Home

Trane IntelliPak Modular Series User's Manual

1. Or Liquid Line 2 Service Valves High ig Pressure Cutout High Compressor Cutout Schrader Valve Compressor Valve Figure O M Z Typical water cooled SXWG compressor section components SCXG SVX01B EN 105 e TRANE Owner Inlet Guide Vanes On occasion the inlet guide vane actuator Perform the following procedure every or inlet guide vanes may need to be six months for proper inlet guide vane removed For proper adjustment of inlet operation guide vanes and or actuator see Figure 1 Spray all parts of guide vane assembly O M 8 with WD40 Pg aT a SUIT EE 2 Spray all steel parts of guide vane Note Perform this procedure monthly if assembly with ZRC the unit is in a coastal area or corrosive 3 Spray hubs and moving parts with dry environment silicone lubricant Mobil Mobilux 2 Shell alvonia 2 or equivalent Linkage Figure O M 8 Proper adjustment of inlet guide vanes 106 SCXG SVX01B EN Coil Fin and External Cleaning Keep coils clean to maintain maximum performance For operation at its highest efficiency clean the refrigerant coil often during periods of high cooling demand or when dirty conditions prevail Clean the coil a minimum of once per year to prevent dirt buildup in the coil fins where it may not be visible Remove large debris from the coils and straighten fins before cleaning Remove filters before cleaning Clean refrigerant coils with cold water and
2. File Number PL UN SCXF SVX01B EN 700 The Trane Company Supersedes SCXG SVX01A EN A Division of American Standard Inc a WWW com Stocking Location LaCrosse Inland For more information contact your local district office or e mail us at comfort trane com SinceTheTrane Company has a policy of continuous product improvement it reserves the right to change design An American Standard Company and specifications without notice
3. IntelliPak Commercial Self Contained Modular Series 20 35 Ton Models BO and later Design Sequence SCWG 020 025 030 035 SIWG 020 025 030 035 SCRG 020 025 032 SIRG 020 025 032 July 2000 SCXG SVX01B EN e TRANE American Standard Inc 2000 About This Manual Literature Change History Use this manual for commercial self contained models SCWG SIWG SCRG and SIRG This is the original issue of this manual It provides specific installation owner maintenance and diagnostic troubleshooting instructions for BO and later design sequences The BO design sequence includes the VFD option change from Square D Altivar 66 to Altivar 58 For information on previous design sequences contact your local Trane representative Warnings and Cautions Warnings in this manual indicate potential hazardous situations that can result in death or serious injury Cautions in this manual indicate potential hazardous situations that may result in minor or moderate injury and or equipment damage Examples Disconnect electrical power source before servicing unit to prevent injury or death from electrical shock Use only copper conductors for electrical unit connections to prevent equipment damage Common HVAC Acronyms For convenience a number of acronyms and abbreviations are used throughout this manual These acronyms are alphabetically listed and defined
4. 1 15 Occupied Zone Temperature Cooling 93 Occupied Zone Temperature Heating 94 Occupied Unoccupied Contacts 79 Occupied Unoccupied Inputs 78 Occupied Unoccupied Switching 91 Operating Procedures 111 Option Menu and Keypad Operation 69 Optional Controls 5 P Periodic Maintenance Checklists 110 Piping Components 109 Plenum 41 Points List 77 Pre Installation Checklist 16 Pre Startup Checklist 63 Pre Startup Procedures 39 Pressure Cutouts 96 PRESSURIZE sequence 80 Program Button 66 Program Menu 66 Programmable Night Setback Zone Sensors 55 Programmable Night Setback Zone Sensor Installatio 56 Programming the Time Clock Option 73 PURGE sequence D 81 PURGE with duct pressure control E 81 R Receiving 63 Receiving and Handling 9 Receiving Checklist 9 Refrigerant Charge 104 Refrigerant Coils 107 Refrigerant Emissions 102 103 Refrigerant Leak Testing 103 Refrigerant Piping 36 Refrigerant System 102 Remote Human Interface Module Option 80 Remote Human Interface Panel 58 Remote Mounted Thermostat Option 50 Remote Mounted Thermostat Wiring 50 Remote Panel Indicator Signals From UCM to ZSM 70 Remote Zone Sensor Options 51 Reset based on outdoor air tempera ture 94 Reset based on zone temperature 94 121 e TRANE Return Air Humidity Sensor Failure 115 Return Air Temp Sensor Failure 115 Return Air Temperature Sensor 90 RHI 58 80 Rigging and Handling 13
5. 2 Fan isolator locations SCXG SVX01B EN 39 e TRANE Note The compressors and fan assembly are internally isolated Therefore external isolation devices spring mounting isolators are at the discretion of a vibration specialist consulted by the building or HVAC system designer In general the Trane Company does not recommend double isolation 40 Installation Unit Vibration Isolator Option Vibration isolation is not necessary for the unit since the factory internally isolates the fan and compressors thus creating double isolation The Trane Company strongly recommends that you consult a vibration specialist when considering double isolation If job requirements dictate unit isolators use a housed spring isolator with a locating pin Factory provided unit isolators are type CP and indicate the spring number on the outer housing See Figure I PR 3 Set the spring type vibration isolators in position before completing electrical piping or duct connections Units require four isolators per unit Reference the isolator placement sheet that ships with the isolators to indicate proper placement Unit Isolator Installation Procedure Follow the procedure below to install isolators 1 Position the isolators under the unit base referring to the isolator placement sheet that ships with the unit isolators Lift one end of the unit at a time to position the isolators Fasten the isolators to the floor using anchor bol
6. Wall Mounting the RHI Panel 1 Prior to mounting the panel the microprocessor module must be removed from the enclosure Complete step 2 in the previous discussion Mounting on a 4 in x 4 in Electrical Box before proceeding 2 With the microprocessor removed refer to Figure I PR 31 for the location of the mounting holes to be used for wall mounting 3 Place the enclosure against the mounting surface and mark the mounting holes Note The top of the enclosure is marked with 4 With the enclosure in the correct position remove the enclosure and drill the necessary holes in the surface for the appropriate fasteners plastic anchors molly bolts screws etc 5 Remove the necessary knockouts for the wire or conduit entry before mounting the panel 6 Place the enclosure back onto the surface and secure it with the appropriate screws 7 Follow step 5 in the previous section Mounting on a 4 by 4 Electrical Box to replace the microprocessor within the enclosure 59 TRANE Installation 4 78 0 20 X 0 40 SLOT 6 PLACES 20 25 HOLE EIU i i 1 id 6 08 10 70 12 01 3 40 10 98 e 2 4 31 0 65
7. 12 Insulate discharge and suction lines with the insulation provided 13 Remove panel FLR and open the bottom control panel door FLL Pull the fan motor leads coiled in the fan section through the knockout in the bottom of the fan section to the control panel Ensure that the bushing is installed in the hole to prevent the wires from chafing Refer to the unit wiring diagrams to connect the fan motor leads properly and ensure correct phase sequencing IntelliPak Units UCM Only 14 Remove panels FML FMM and FMR 15 Pull the circular plug connector CPC from the compressor section through the knockouts into the fan section Install the bushings provided on the wiring harnesses in the knockouts 16 Using the CPC wiring diagram connect the male CPC to the female CPC in the top control panel 17 If the unit has the mixed air temperature option route the capillary tube on back of the filter rack Units with Thermostat Only 18 Remove panel FMR See Note 1 on Figure 10 19 Pull frost protection wires from the bottom control panel throughknockouts in bottom of fan section Route wires to the appropriate frost protection switches on the evaporator coil Reference the unit wiring diagrams to connect frost protection wiring connectors Air Cooled Units Only 20 Route the refrigerant circuit wires for circuits 1 and 2 from the bottom control panel through the knockouts to the solenoid valves The solenoi
8. 23 _ Maximum Heating Setpoint 43 to 96 F 96 F I I OPTION Option Value Option Number and Use Figure 8 Typical option menu screen SCXG SVX01B EN 69 e TRANE Note On both programmable zone sensor options changing either option 9 or 10 will erase the current program To avoid reprogramming set options 9 and 10 before programming Intelligent Copy Note Once you have used Intelligent Copy you cannot use it again until you ERASE all weekday and weekend time periods by pressing ERASE for 5 seconds If your heating and cooling requirements are the same for each day of the week and for each day of the weekend your ZSM is designed to employ Intelligent Copy To program the five weekdays Monday through Friday program only one weekday Likewise to program the weekend Saturday and Sunday pro gram only one day After programming one weekday and or one weekend day Intelligent Copy automatically copies your program to the other days Using Intelligent Copy 1 Be sure to select the seven day programming format in the Options Menu See Tables I P 1 and 2 2 Be sure the entire program is blank 3 Go to the program menu 4 Enter your setpoint parameters Intelligent Copy will automatically copy these parameters to the other weekdays 5 Depress the DAY pushbutton until a weekend day icon appears 6 Enter setpoint parameters Intelligent Copy will automatically copy these p
9. SXWG 29 SXWG 30 27 12 2 25 11 3 SXWG 35 27 12 2 27 12 2 Table O M 2 Air Cooled Unit SXRG Refrigerant Charge Unit Size Circuit 1 Circuit 2 Circuit 1 Circuit 2 Charge Ibs Charge Ibs kg SXRG 20 B 10T A 10T 36 36 SXRG 25 32 B 10T 15 36 58 104 To charge the system complete the following procedure 1 Charge liquid refrigerant into the liquid line service valve of each compressor circuit The vacuum will draw some of the required refrigerant into the system See Figure O M 7 on page 105 2 Complete the charging process by charging gaseous refrigerant into the suction line shrader valve with the unit running However make sure that some refrigerant is present in each circuit before starting the compressors The refrigerant container should be upright so that gaseous refrigerant is drawn off the top Note Charge each circuit with R22 See Tables O M 1 and O M 2 Ax CAUTION Do not allow liquid refrigerant to enter the suction line Excessive liquid will damage the compressor SCXG SVX01B EN e TRANE Owner Compressor Junction Oil Charging Pressure i iauid Li Valve Relief Suction Liquid Line 12 Line Service Valves Front View Discharge uda N Compressor f lt J Junction Suction Box ai t Discharge Line wil Oil Level Oil Level roe Sight Glass Sighi Glass H gh E 2 Oil Charging uro au TTS Dim Valve Top View
10. s without Cover e Figure I PR 23 Typical zone sensor installation SCXG SVX01B EN Programmable Night Setback Zone Sensors Programmable night setback NSB zone sensors provide programming and zone temperature sensing for the self contained unit It allows the user to monitor room temperatures and program settings in the space without having to access the unit control panel Reference programming instructions for these zone sensors on page 64 SCXG SVX01B EN Installation e TRANE Constant Volume Zone Sensor BAYSENS019 Description This seven day programmable sensor with night setback has four periods for occupied unoccupied programming per day If power is interrupted the program retains in permanent memory If power is off longer than 2 hours only the clock and day may have to be reset The six programming keys on the front of the zone sensor allow selection of system modes heat cool auto and off two fan modes on and auto The zone sensor has dual temperature selection with programmable start time capability The occupied cooling setpoint ranges between 40 and 80 warmup setpoint ranges are between 50 and 90 F with a 2 degree deadband The unoccupied cooling setpoint ranges between 45 and 98 F The heating setpoint ranges between 43 and 96 F Two liquid crystal displays LCD display zone temperature setpoints week day time and operational mode symbols The DIP switches on the
11. Digit 15 16 Motor HP 05 07 10 15 20 25 5 HP Motor 75 HP Motor 10 HP Motor 15 HP Motor 20 HP Motor 25 HP Motor Digit 17 18 19 Fan RPM 085 090 095 100 105 110 850 rpm 900 rpm 950 rpm 1000 rpm 1050 rpm 1100 rpm 115 120 125 130 135 140 145 150 155 160 165 170 175 1150 rpm 1200 rpm 1250 rpm 1300 rpm 1350 rpm 1400 rpm 1450 rpm 1500 rpm 1550 rpm 1600 rpm 1650 rpm 1700 rpm 1750 rpm 180 1800 rpm 185 1850 rpm Digit 20 Heating Type Steam Coil LH Hot Water Coil LH Electric Heat 1 Stage Hydronic Heat Ctrl Interface Elec Heat Ctrl Interface 1 stage Steam Coil Ship Separate LH Hot Water Coil Ship Separate LH Steam Coil RH Hot Water Coil RH Steam Coil Ship Separate RH Hot Water Coil Ship Separate RH None gt igit 21 Unit Isolators lsopads Spring Isolators None igit 22 Unit Finish Paint Executive Beige Protective Coating Protective Coating w Finish Coat Digit 23 0 None Digit 24 Unit Connection 1 Disconnect Switch 2 Terminal Block 3 Dual Point Power Digit 25 Industrial Options Protective Coated Evaporator Coil Silver Solder C D E Ng ozmumvuz w Stainless Steel Screws AandB AandC SCXG SVX01B EN Drain Pan Type Galvanized Sloped Stainless Steel oe ere 8 X 57 E g 3 N
12. The SCRG SIRG air cooled condenser should be wired to the control panel of the SCRG SIRG unit to ensure proper system operation Reference unit wiring diagrams for correct terminal locations Table I PR 3 provides recommended wires sizes for length of run Table I PR 6 Control Wire Size and Maxi mum Length Wire Gauge Max Wire Length 22 30 ft 20 50 ft 18 75 ft 16 125 ft 14 200 ft SCXG SVX01B EN Standard with All Units Figure 15 BAYSENS017 Zone Temperature Sensor Only CV Unit Zone Sensor Option Figure I PR 16 BAYSENS008 Dual setpoint manual automatic changeover sensor Accessory Model Number Digit 6 E VAV Unit Zone Sensor Option Figure I PR 17 BAYSENS021 Single setpoint sensor with system function lights Accessory Model Number Digit 6 H SCXG SVX01B EN e TRANE Pre Startup equirements installation Remote Zone Sensor Options Zone sensor options are available and can be ordered with the unit or after the unit ships Following is a full description of zone sensors and their functions Installation instructions are on page 53 Instructions for the programmable zone sensor are on page 55 Refer to Table O GI 2 on page 79 for the zone sensor temperature vs resistance coefficient curve BAYSENSO17B Description This zone sensor module ships with all units and can be used with 5019 BAYSENS020 or 5 5021 remote sensors When this sensor is wi
13. e CV unoccupied mode indicator CV units only e Alarm e Fan run request e Water pump request water cooled only Analog input e Airside economizer damper minimum position Analog output e Outside air damper actuator Heat Module e Analog output GBAS Module Binary inputs e Demand limit contacts Binary outputs e Dirty filter relay e Refrigeration fail relay e Heat fail relay e Supply fan fail relay e Active diagnostics Analog inputs Occupied zone cooling setpoint Occupied zone heating setpoint Unoccupied zone cooling setpoint Unoccupied zone heating setpoint or minimum outside air flow setpoint Supply air cooling setpoint Supply air heating setpoint Supply air static pressure setpoint ECEM Module Analog inputs e Return air temperature e Return air humidity In addition units with a VOM have Binary inputs e VOM mode A unit off VOM mode B pressurize VOM mode C exhaust VOM mode D purge VOM mode E purge w duct pressure control Binary output e VO relay TCI Module Binary input Enthalpy enable airside economizer Binary outputs Compressor on off status Ventilation status Condenser water flow status Heat status Analog outputs Supply air pressure e Supply air temperature e Suction temperature of each circuit Entering economizer water temperature Zone temperature Entering condenser water temperature Supply air tempera
14. fused disconnect switch in the control box terminals Refer to specific wiring diagrams and fuse information in the unit s control panel A CAUTION Disconnect electrical power source to prevent injury or death from electrical shock Use only copper conductors for electrical unit connections to prevent equipment damage Correct phase sequence is critical If phase sequence of the incoming line voltage is not correct it may result in motor damage Voltage Range Voltages must be within 10 the nameplate voltage Ensure the unit voltage is balanced by measuring at the compressor terminals Voltage imbalance on three phase systems can cause motor overheating and premature failure Maximum allowable imbalance is 2 0 percent Voltage Imbalance Read the voltage at the compressor terminals to determine if it is balanced Voltage imbalance on three phase systems can cause motor overheating and premature failure The maximum allowable imbalance is 2 096 Voltage imbalance is defined as 100 times the sum of the deviation of the three voltages from the average without regard to sign divided by the average voltage For example if the three measured voltages are 221 230 and 227 the average voltage would be 221 230 227 226 volts 3 The percentage of voltage imbalance is then 100 226 221 2 2 226 Control Power In this example 2 296 imbalance is not acceptable Whenever a voltage imbalanc
15. 0 None Digit 19 Tracer Communications Interface Kit TCI 12 TCI Comm 3 Kit 0 None Digit 20 Ventilation Override Module Kit VOM 1 VOM Kit 0 None Digit 21 Sensors and Thermostats BAYSENS017 Zone Temp Only CV and VAV B BAYSENS013 Zone Temp with Timed Override Button CV and VAV BAYSENS014 Zone Temp with Timed Override Button Setpoint Dial E BAYSENS008 CV Zone Sensor F BAYSENS010 CV Zone Sensor with Indicator Lights G BAYSENS019 CV Programmable Night Setback Sensor H 5 5021 Zone Sensor with Indicator Lights J BAYSENSO20 Programmable Night Setback Sensor K Remote Sensor Kit L Outside Air Temperature Sensor Kit M Outside Air Humidity Sensor Kit 0 None Digit 22 Low Entering Air Temperature Protection Device 1 Low Entering Air Temperature Protection Device Kit 0 None Digit 23 High Duct Temperature Thermostat 1 High Duct Temp Thermostat Kit 0 None Digit 24 Plenum High Static Switch 1 Plenum High Static Switch Kit 0 None Digits 25 45 Future Use 0 None SCXG SVX01B EN Receiving and Handling Shipping Package Commercial self contained units ship assembled on skids with protective coverings over the coil and discharge openings Figure I PC 1 illustrates typical shipping package Ship Separate Accessories Field installed sensors ship separately inside the unit s ma
16. 10 Figure I PR 10 Vertical discharge electric heat installation 46 Installation 4 Use the hole pattern in the electric heat as a template for marking and drilling 346 diameter holes in the unit 5 Bolt the electric heaters to the unit using 1 4 sheetmetal screws Note It is very important that electric heaters are selected based on unit voltage and tonnage because discharge opening sizes vary by unit tonnage Electric Heat Coil Wiring Procedure 1 Before wiring the electric heater remove the unit wiring diagram from the unit control panel and refer to the connection points Disconnect electrical power source before wiring electric heat to unit to prevent risk of injury or death from electrical shock 2 Punch out the appropriate knockouts in the electric heater control box and on the unit s left side panel Run the wires down the side of the unit from the heater to the lower unit control box Place the wire in conduit in accordance with local code A CAUTION Use only copper conductors for electrical connections to prevent equipment damage WER Dre Aat e LEFT END VIEW A eur FRONT VIEW Figure I PR 11 Electric heater dimensions Table I PR 4 Electric Heat Dimensions English inches Unit Size B1 B2 2 20Tons 10 34 15 5 8 27 3h 25Tons 12 1 4 15 26 3 4 30
17. 4 request is issued to the compressor staging control function Reset Required PMR A manual reset is required after the disgnostic is set It can be reset by the HI Tracer Summit or by cycling power to the RTM Compressor Trip Ckt 1 2 3 or 4 Problem The compressor ckt 1 2 3 or 4 has tripped Reason for Diagnostic The ckt 1 2 3 or 4 compressor proving input is detected open continuously for more than 3 seconds when either or both compressor outputs on that circuit energize as described in the compressor protection function Reason for Diagnostic The circuit compressor proving input is detected open continuously for more than 3 seconds when either or both compressor outputs on that circuit energize as described in the compressor protection function UCM Reaction A lockout ckt 1 2 3 or 4 request is issued to the compressor staging control function Reset Required PMR A manual reset is required after this diagnostic occurs The diagnostic can be reset by the unit mounted HI module Tracer Summit or by cycling power to the RTM Condenser Temp Sensor Failure Circuit 1 2 3 or 4 Problem The saturated condenser temperature input is out of range for circuit 1 2 3 or 4 Check Sensor resistance should be between 830 ohms 200 F and 345 7Kohms 40 F If so check field unit wiring between sensor and MCM SCM Reason for Diagnostic The unit is reading a signal that is
18. A base for DIN rail mounting is optional Wiring the Timeclock 1 Wire 24 120 or 220 VAC to input terminals Make sure to apply correct voltage Using incorrect voltage will void the warranty 2 Connect wire to the screw terminals according to the unit wiring diagrams Use 12 to 22 AWG wire 57 e TRANE Installing the Remote Human Interface Panel Human Interface HI Panel The HI enables the user to communicate necessary unit operating parameters and receive operating status information from within the occupied space The HI displays top level information in the LCD window unless the operator initiates other displays for the various unit functions It also displays menu readouts in a clear language 2 line 40 character format The 16 key keypad allows the operator to scroll through the various menus to set or modify the operating parameters See Figure I PR 31 to reference the HI keypad Remote Human Interface Panel The remote human interface RHI panel is identical to the unit mounted HI with the exception of the unit select key This key allows the operator to switch from one unit to the next to program or view status information regarding a particular unit The RHI functions the same as the unit mounted HI with two exceptions The first is the test start function The operator can view the service parameters but can only initiate the service test function at the unit The RHI door has a lock
19. Condenser Piped SXWG 20 35 1 V NPT 2 NPT Waterside Economizer Option The waterside economizer option takes advantage of cooling tower water to either precool the entering air to aid the mechanical cooling process or if the water temperature is low enough provide total system cooling Waterside economizing enables when the unit s entering water temperature is below the unit s entering mixed air temperature by a minimum of 4 F plus the economizer s approach temperature The approach temperature default is 4 E Waterside economizing disables when the unit s entering water temperature is not below the unit s entering mixed air temperature by at least the water economizer approach temperature The approach temperature defaults to 4 F The economizer acts as the first stage of cooling If the economizer is unable to maintain the supply air setpoint the unit control module brings on compressors as required to meet the setpoint The waterside economizer includes a coil modulating valves controls and piping with cleanouts The coil construction is 1 2 inch 13 mm OD seamless copper tubes expanded into aluminum fins The evaporator and economizer coils share a common sloped IAQ drain pan Drain pan options are either galvanized or stainless steel and are insulated and internally trapped The waterside economizer coil is avail able with either a two or four row coil with no more than 12 fins per inch The tubes are ar
20. Depressing the negative side will decrease the time Each time you depress the positive or negative side minus and plus the time will either advance or decrease respectively by one minute If you press and hold either side of the time button the time change will accelerate rapidly When you reach the correct time release the time button and the time will be set into permanent memory Note To ensure the time changes are made the ZSM will initiate a 30 second user stabilization time before making changes to the ZSM operation mode Keypad Operation Note After toggling to the program screen the week is divided into seven days with each day divided into four periods Therefore 28 program settings are possible Program Button Depressing the program button will toggle the display from normal run mode 66 Installation to the program menu See Figure 2 Before toggling to the program menu use the mode button to select the type setpoints to review or program heat cool or auto For example if you select cool mode before toggling to the program menu then only the cool setpoints are reviewed or programmed If you select heat mode then only the heat setpoints are reviewed or programmed In auto mode both heat and cool setpoints are reviewed and programmed While in program menu each time you press and release the program button the ZSM toggles through the four periods that divide each day
21. NFPA 90 Make duct connections to the unit with a flexible material such as heavy canvas If a fire hazard exists Trane recommends using Flexweave 1000 type FW30 or equivalent canvas Use three inches for the return duct and three inches for the discharge duct Keep the material loose to absorb fan vibration Note The compressors and fan assembly are internally isolated Therefore external isolation devices spring mounting isolators are at the discretion of a vibration specialist consulted by the building or HVAC system designer Run the ductwork straight from the opening for a minimum of three fan diameters See Figure I MR 1 Extend remaining ductwork as far as possible without changing size or direction Do not make abrupt turns or transitions near the unit due to increased noise and excessive static losses Use elbows with splitters or turning vanes to minimize static losses Poorly constructed turning vanes may cause airflow generated noise Align the fan outlet properly with the ductwork to decrease noise levels in the duct and to increase fan performance To complete trunk ductwork to the VAV terminal units refer to the VAV box manuals for specific requirements Check total external static pressures against fan characteristics to be sure the required airflow is available throughout the ductwork To achieve maximum acoustical perfor mance minimize the duct static pressure setpoint Discharge Duct
22. Occupied Zone Temperature Heating Relies on input from a sensor directly in the space while a system is in occupied heating mode or an unoccupied period to stage electric heat on and off or modulate the hydronic heating valve as required to maintain the zone temperature within the heating setpoint deadband The supply fan will operate when there is a request for heat Electric Heat On units with electric heat the zone temperature can be controlled to a heating setpoint during the occupied mode by cycling a single stage electric heater An interface is provided for field supplied single stage electric heat The zone temperature heating setpoint and 94 Owner deadband are user defined at the HI panel Hydronic Heat Hot Water or Steam On units with hot water or steam heating the zone temperature can be controlled to a heating setpoint during the occupied mode The zone temperature heating setpoint and deadband are user defined at the HI panel or zone sensor VAV occupied heating initiates by closing a field supplied switch or relay contacts connected to the changeover input on the RTM Supply air static pressure is maintained Supply Air Setpoint Reset VAV Units Only Supply air reset can be used to adjust the supply air temperature setpoint on the basis of a zone temperature or outdoor air temperature Supply air reset adjustment is available at the HI panel for supply air heating and supply air cooling contro
23. Rigging and Unit Handling 12 RTM Alarm Relay 78 RTM Analog Outputs 78 RTM Aux Temp Sensor Failure 116 RTM Binary Outputs 78 RTM Data Storage Error 116 RTM Module Board 78 RTM Remote Economizer Minimum Position 78 RTM Sensors 79 RTM Zone Sensor Failure 116 S Saturated Condenser Temperature Sensors 89 SCM 80 SCM Communication Failure 116 Selection Procedures 38 Semi Annual Maintenance 110 Service Access 11 Service Valves 97 Setting the Time 73 Ship Separate Accessories 9 Ship With Accessory Model Number Description 7 Shipping Package 9 Skid Removal 16 Space Static Press Setpt Failure 116 Special Note on Refrigeration Emis sions 2 Split Apart Unit Assembly 14 Standard Remote Sensor BAYSENS017 53 Standard Two Position Damper Interface 88 Startup Log 75 Static Pressure Transducer Installatio 49 Status Annunciator Output 78 Steam and Hot Water Coils 107 Step Control 96 suction pressure approaches 7 4 psig 89 suction pressure exceeds 22 4 psig 89 Supply Air Fan 86 122 Supply Air Pressure Sensor Failure 116 Supply Air Pressure Setpoint Failure 116 Supply Air Setpoint Reset 94 Supply Air Static Pressure Limit 86 Supply Air Temp Cool Setpoint Fail 117 Supply Air Temp Heat Setpoint Fail 117 Supply Air Temperature Control 93 Supply Air Temperature Failure 117 Supply Air Temperature Low Limit 90 Supply Air Temperature Sensor 90 Supply Air Tempering 94 Supply Airflow Provin
24. Standing water in drain pans can promote microbial growth mold which may cause unpleasant odors and serious health related indoor air quality problems If microbial growth is found it must be removed immediately and that portion of the unit properly cleaned and sanitized Inspecting and Cleaning the Fan Inspect the fan section every six months or more frequently if operating experience dictates Clean accumulated dirt and organic matter on the fan interior surfaces following the procedure below 1 Disconnect all electrical power to the unit 2 Don the appropriate personal protective equipment PPE 3 Use a portable vacuum with HEPA filtration to remove the loose dirt and organic matter The filter should be 99 97 efficient at 0 3 micron particle size 4 If no microbial growth mold exists thoroughly clean the fan and associated components with an industrial cleaning solution Carefully follow the cleaning solution manufacturer s instructions regarding personal protection and ventilation when using their product 5 If microbial growth is present remove the contamination Step 2 and thoroughly clean the affected area with an EPA approved sanitizer specifically designed for HVAC use Carefully follow the sanitizer manufacturer s instructions regarding the product usage 6 Rinse the affected surfaces thoroughly with fresh water and a fresh sponge to prevent potential corrosion of metal surfaces 7 Allow the
25. WATER OUTLET 191 SEE DETAIL 629 SEE DETAIL A pup FRONT VIEW WATER INLET ON PAGE 21 64mm ENPT __ 432 WATER OUTLET WATER OUTLET 356 64mm __ IATER WATER INLET en ee 38mm CONDENSER 194 FITTINGS 4X FT SIDE VIEW ET SIDE VIEW FACTORY PIPED UNITS DIRECT CONDENSER CONNECTIONS 19mm 4x ISOLATOR HOLE LOCATION 889 784 ON BOTTOM OF UNIT VERTICAL DISCHARGE OPTION SEE DETAIL B FOR DIMENSIONAL DATA ON PAGE 21 279 TOP VIEW RETURN AIR INLET OPENING FILTER ACCESS FILTER ACCESS 38mm ORAIN QUICK RELEASE QUICK RELEASE ACCESS PANEL ACCESS PANEL 108 191 38mm 4X 114 38MM INPT BACK VIEW DRAN WATER INLET 191 64MM WATER OUTLET 292 WATER OUTLET 375 yi 384 WATER INLET WATER OUTLET RIGHT SIDE VIEW FACTORY PIPED UNITS RIGHT SIDE VIEW DIRECT CONDENSER CONNECTIONS SCXG SVX01B EN e TRANE Installation SCRG SIRG Unit English inches HORIZONTAL DISCHARGE OPTION SEE DETAIL B FOR DIMENSIONAL DATA ON PAGE 21 o 9 Q 4 57 c Bg u QUICK RELEASE 1 1 2 INPT ACCESS PANEL DRAIN 35 1 2 7 SEE DETAIL ON PAGE 21 LIQUID LINES LEFT SIDE VIEW FRONT VIEW 5 8 TUBES 2X 41 2 AIR COOLED UNITS DISCHARGE LINES 5 8 TUBES 2X 9 1 4 RIGHT SIDE VIEW AIR COOLED UNITS FILTER ACCESS 03 4 ISOLATOR MOUNTING
26. cooling If outdoor conditions tempera ture and humidity are suitable or the EWT is within specified setpoints the RTM will attempt to use free cooling without using any compressors The RTM will use either the airside or waterside economizer option When outdoor air conditions are not suitable only mechani cal cooling will function and outside air dampers will remain at their minimum position If the unit does not have an economizer mechanical cooling will operate to satisfy cooling requirements Units With Economizer If the entering condenser water temperature units with a WSE or the outside air enthalpy units with an ASE is appropriate to use free cooling the economizer will attempt to satisfy the cooling zone temperature setpoint Note When using an ASE with econo mizer enabled O A temperature enable can be used instead of comparative enthalpy if the O A temperature falls below the economizer setpoint Then compressors will stage on as necessary to maintain supply air tem perature setpoint which is user defined at the HI Minimum on off timing of compressors prevents rapid cycling When both airside and waterside economizers are on a single unit priority must be set at the HI The economizer with the highest priority attempts cooling first Once it is operating at its maximum and if additional cooling is necessary the other economizer enables before mechanical cooling begins Cooling Wate
27. i m 285 Lec 336 340 SIDE VIEW 9 84 FRONT VIEW 6 2 1 075 amp 875 KNOCKOUTS ON TOP amp 2 ON BOTTOM 0 94 7 19 1 00 8 12 BOTTOM VIEW Figure 32 Remote mounting holes and knockout locations 60 SCXG SVX01B EN Wiring the Remote Human Interface The remote human interface requires 24 VAC 4 volts power source and a shielded twisted pair communication link between the remote panel and the interprocessor communication bridge ICPB module at the self contained unit Field wiring for both the low voltage power and the shielded twisted pair must meet the following requirements Note To prevent control malfunctions do not run low voltage wiring 30 volts or less in conduit with higher voltage circuits 1 All wiring must be in accordance with NEC and local codes 2 Reference Table I PR 8 on page 58 for recommended wiring distance and size 3 Communication link wiring must be 18 AWG shielded twisted pair Belden 8760 or equivalent 4 Communication link must not exceed 5 000 feet maximum for each link 5 Do not run communication link between buildings A WARNING Before servicing unit disconnect all electric power including remote disconnects Failure to do so May Cause severe personal injury or death Low Voltage AC Field Wiring Connections To access the wire entry locations open the RHI
28. malfunctioning of expansion valves damaged compressors and so on will result in pressure variations which are outside the normal range Note If phasing at the main incoming power terminal is incorrect switch two of the three incoming power leads If a compressor has been replaced and the phase is changed at the compressor it will run backwards and discharge pressure will be very low To resolve incorrect compres sor wire phasing change phasing at the compressor It is important that pressures be mea sured under stable and constant condi tions in order for the readings to be useful The unit mounted remote mounted or discharge air setpoint can be temporarily adjusted to simulate full load conditions Voltage Imbalance Voltage imbalance on three phase systems can cause motor overheating and premature failure Maximum allowable imbalance is 2 0 percent and the readings used to determine it must be measured at the compressor terminals Voltage imbalance is defined as 100 times the sum of the division of the three voltages from the average voltage If for example the three measured voltages are 221 230 227 the average would be 22142304227 226 volts 3 The percentage of voltage imbalance is then 100 226 221 2 2 226 In this example 2 2 percent imbalance of more than 2 0 percent exists be sure to check the voltage at the unit disconnect and terminal block switch If an imbalance at the unit
29. occurs after communication has been restored Mode Input Failure Problem The RTM mode input is out of range Check Sensor resistance should be between 1 ohm and 40 Kohms If so check field unit wiring between sensor and RTM Reason for Diagnostic The mode input signal on the RTM is out of range resistance 1k ohm or resistance gt 40k ohms SCXG SVX01B EN UCM s Reaction The system mode reverts to the default HI set system mode Reset Required INFO An automatic reset occurs after the mode input returns to its allowable range for 10 seconds N NSB Panel Zone Temperature Sensor Failure Problem The NSB panel s zone temp sensor input is out of range This input is at the NSB panel not on the unit itself Check If have an external sensor connected to the NSB panel zone sensor input then the internal NSB panel zone sensor should be disabled Verify sensor resistance If in valid range check wiring between the sensor and NSB panel NSB Panel Comm Failure Problem The RTM has lost communications with the night setback panel programmable zone sensor Check Field unit wiring between RTM and NSB Panel Reason for Diagnostic The RTM has lost communication with the NSB panel UCM s Reaction The unit reverts to the next lower priority mode switching source typically the HI default mode If the NSB panel zone sensor is the designated sensor source for any functions those functions are dis
30. provided isolator placement sheet Lift one end of the unit at a time to position isolators to the floor using anchor bolts 2 Level the unit by adjusting isolator heights Unit weight may cause the upper housing to rest on the lower housing of the spring isolators The isolator clearance shown in the side view of Figure I PC 9 must be 1 4 inches To increase the clearance lift 16 Installation Top View Upper Housing Side View 1 4 1 2 I 23 4 1 2 Dia Positioning Pin Leveling Bolt Clearance Unloaded Height Lower Housing et SS i paaa 22 23 5 7 8 5 8 Neoprene Pad Figure 9 Optional spring isolator dimensional data the unit off the isolator and turn the leveling bolt counterclockwise Recheck the unit level and the housing clearances Maximum allowable difference between isolator heights is 1 4 inch Shim as required under the isolators Note The compressors and fan assembly are internally isolated on most units Due to this the addition of external isolation devices spring mounting isolators is at the discretion of the building or HVAC system designer Pre Installation Checklist Complete the following checklist before beginning unit installation Verify the unit size and tagging with the unit nameplate Make certain the floor or foundation is level solid and sufficient to support the unit and accessory weights See Table I DW 1 on
31. 127 V 87 7 26168 10 460V 9 7 8 7 12 7 127 7 8W 7 26168 15 200V 9 33 8 33 22 3 217 3 117 V 75168 15 460V 9 y 8 7 123 7 127 8 7 26168 20 200 9 3 8 32 22 21 3 1 V 75168 20 460V 9 7 8 V 16 V 157 V 87 7 31168 25 200V 14 1 12 1 26 n 24 7 121 7 126168 25 460V 95 93 8 7 22 3 21 VW V 75168 Variable Frequency Drive Dimensions Metric mm Motor HP Voltage A B c D E F G H J K Weight 7 5 200V 229 13 203 13 324 6 311 6 210 6 12 kg 7 5 460V 175 10 156 10 286 10 267 10 184 6 7 kg 10 200V 229 13 203 13 324 6 311 6 210 6 12 kg 10 460V 229 13 203 13 324 6 311 6 210 6 12 kg 15 200V 244 19 206 19 559 10 540 10 286 6 34 kg 15 460V 229 13 203 13 324 6 311 6 210 6 12 kg 20 200V 244 19 206 19 559 10 540 10 286 6 34 kg 20 460V 229 13 203 13 416 6 403 6 210 6 14 kg 25 200V 356 25 305 25 660 10 629 22 308 10 57 kg 25 460V 244 19 206 19 559 10 540 10 10 286 34 kg SCXG SVX01B EN Installation Variable Frequency F Drive with Bypass B _ G H m G I 1 E D D J ki r1 1 00 DIA 25mm 37 DIA 9mm MOUNTING HOLES 4X MOUNTING HOLES 4X FRONT VIEW LEFT SIDE VIEW A B C KNOCKOUTS TOP AND BOTTOM i 2121 Qi O MARNE O o VIEW BOTTOM VIEW SCXG SVX01B
32. 44 8 19 6 25 25 20 55 6 24 2 30 24 66 8 29 0 32 26 72 4 31 6 35 28 78 34 0 Note Electric heat amperage should not be considered when determining minimum circuit ampacity The current of the unit in the heating mode will not exceed the current of the unit in the cooling mode SCXG SVX01B EN e TRANE Installation Pre Startup Procedures Before starting up units perform the following procedures to ensure proper unit operation Unit Protective Covers Remove the shipping protection coverings from the human interface panel HI at the control panel the filter box or air inlet opening the discharge air opening and optional variable frequency drive VFD Compressor Isolators Loosen compressor isolator mounting bolts and remove shipping bracket from beneath the compressor feet Retighten isolator mounting bolts Torque to 18 ft Ibs 2 ft Lbs Supply Fan Isolators Remove the shipping channels and mounting bolts from beneath the fan See Figure I PR 1 Open both fan compartment access doors to access the channels The unit has six isolator mounting points See Figure I PR 2 While keeping the fan mounting frame level turn the fan isolator height adjusting bolts until the fan housing P gasket compresses 1 4 against the roof transi tion piece See Figure I PR 1 Remove 2 shipping bolts Remove 2 shipping bolts and channels from flange and channels from flange Isolators Figure
33. 5 4 8 mm holes Gently tap the plastic wall anchors into the holes until the anchor tops are flush with the wall 6 Pull the zone sensor module wires through the subbase as shown in Figure I PR 31 7 Loosely secure subbase to the wall with the mounting screws Do not tighten the subbase screws yet 8 Level the subbase by sight then firmly tighten the three subbase mounting screws Figure 29 Securing the subbase A CAUTION Do not overtighten the subbase screws Overtightening may cause the screws to crack the subbase 9 Before wiring the subbase identify the wires from the unit s low voltage terminal strip Each screw terminal is labeled 10 Remove TB from subbase and discard the tape 11 Strip the wires and connect the wires from the units low voltage terminal strip to the zone sensor module subbase Reference connection details on the unit wiring diagrams located on the unit 12 Firmly tighten each screw terminal 13 Fit the wires as close to the subbase as possible SCXG SVX01B EN Figure 30 Grasslin time clock option SCXG SVX01B EN Installation e TRANE Time Clock Option The time clock option has a programmable timer that is factory wired to the unoccupied input to provide on off control The time clock will not allow the unit to pass through the night setback morning warmup mode except on units with optional night heat morning warm up or progra
34. EN 29 e TRANE Installation Variable Frequency Drive With Bypass Dimensions English inches Motor HP Voltage A B C D E F G H J K L M Weight 7 5 200V 19 17 1 41 393 13 12 3 38 17 20 23 126 Ibs 10 200V 197 17 17 41 39 13 12 31 38 1 20 2 126165 10 460V 19 1 177 17 4 3997 13 12 37 38 17 20 2 126 lbs 15 200V 20 18 17 49 477 16 147 6 463 207 180 Ibs 15 460V 1975 17 17 4 393 13 12 3 38 1 20 23 126 Ibs 22 2V 2 18 17 49 477 163 14 6 4 207 1801 20 460V 197 17 17 41 39 3 13 12 31 38 1 20 2 126165 25 200V 20 18 17 49 477 16 147 6 46 207 180 Ibs 25 460V 20 18 17 49 477 16 147 6 46 207 180 Ibs Variable Frequency Drive With Bypass Dimensions Metric Motor HP Voltage A B C D E F G H J K L M Weight 75 200V 495 445 48 1041 1010 343 305 83 965 38 521 60 57 kg 75 460V 362 311 48 889 857 343 305 83 813 38 375 60 40 kg 10 200V 495 445 48 1041 1010 343 305 83 965 38 521 60 57 kg 10 460V 495 445 48 1041 1010 343 305 83 965 38 521 60 57 kg 15 200V 508 457 48 1244 1216 416 378 152 1178 521 82 kg 15 460V 495 445 48 1041 1010 33 305 83 965 38 521 60 57 20 200V 508 457 48 1244 1216 416 378 152 1178 521 82 kg 20 460V 495 445 48 1041 1010 343 305 83 965 38 521 60 57 kg 25 200V 508 457 48 1244 1216 416 378 152 1178 521 82 kg 25 460V 508 457 48 1244 121
35. LOCATION ON BOTTOM OF UNIT VERTICAL DISCHARGE OPTION SEE DETAIL B FOR DIMENSIONAL DATA L ON PAGE 21 ut SCXG SVX01B EN 19 e TRANE Installation SCRG SIRG Unit HORIZONTAL DISCHARGE OPTION Metric mm SEE DETAIL B FOR DIMENSIONAL DATA ON PAGE 21 FILTER ACCESS FILTER ACCESS 38mm INPT DRAIN SEE DETAIL ON PAGE 21 LIQUID LINES LEFT SIDE VIEW FRONT VIEW 16mm TUBES 2X 114 AIR COOLED UNITS DISCHARGE LINES 16mm TUBES 2x 235 RIGHT SIDE VIEW AIR COOLED UNITS FILTER ACCESS 19mm 4X ISOLATOR MOUNTING LOCATION ON BOTTOM OF UNIT VERTICAL DISCHARGE OPTION SEE DETAIL B FOR DIMENSIONAL DATA ON PAGE 21 279 BACK VIEW 20 SCXG SVX01B EN e TRANE Installation SCRG SIRG SCWG SIWG Detail SCRG SIRG SCWG SIWG Detail A Electrical Connections A Electrical Connections English inches Metric mm 12 375 9 375 38mm KO LOW VOLTAGE CUSTOMER CONNECTIONS 61 50 KO LOW VOLTAGE CUSTOMER CONNECTIONS Unit Dimensions English inches UnitTons A B c D E F SCWG SCRG 20 20 10 58 5 13 117 SCWG SCRG 25 9 12 575 5 137 T SCWG 30 35 SCRG 32 18 145 56 5 13 17 FRONT VIEW SHOWN WITH HORIZONTAL DISCHARGE OPTION Unit Dimensions Metric mm UnitTons A B C D E F SCWG SCRG 20 508 508 1486 130 337 292 SCWG SCRG 25 489 489 1464 130 337 292 SCWG 30 35 SCRG 32 457 457 1435 130
36. M Manifolded Air Cooled Digits 7 8 Unit Nominal Capacity 20 20 Tons Water or Air 22 22Tons Water Only 25 25 Tons Water or Air 29 29 Tons Water or Air 30 30 Tons Air Only 32 32 Tons Water Only 35 35 Tons Water or Air 38 38 Tons Water Only 40 40 Tons Air Only 42 42 Tons Water Only 46 46 Tons Water Only 50 50 Tons Air Only 52 52 Tons Water Only 58 58 Tons Water Only 60 60 Tons Air Only 65 65 Tons Water Only 72 72 Tons Water Only 80 80 Tons Water Only Digit 9 Unit Voltage 6 200 Volt 60 Hz 3 ph 4 460 Volt 60 Hz 3 ph 5 575 Volt 60 Hz 3 ph 0 Not Defined Digits 10 11 Design Sequence 0 A Design Digit 12 Unit Power Connection 1 Single Point Power 2 Dual Point Power 0 Not Defined Digit 13 14 Motor HP 05 5 HP Motor 07 7 5 HP Motor 10 10 HP Motor 15 15 HP Motor 20 20 HP Motor 25 25 HP Motor 30 30 HP Motor 40 40 HP Motor 50 50 HP Motor 460V amp 575V Only 0 Not Defined Digit 15 Exhaust Comparative Enthalpy Module Field Installed 1 Kit 2 None Digit 16 Generic BAS Module 1 GBAS 0 5 VDC Kit 0 None Digit 17 Heat Module 1 Electric Heat Module Kit 2 Hydronic Heat Module Kit 0 None Digit 18 Remote Human Interface and IPCB 1 Remote Human Interface Panel Kit RHI Only 2 Interprocessor Communications Module Kit IPCB Only 3 RHI and IPCB Kit
37. Measure fan belt tension with a Browning Gates or equivalent belt tension gauge Determine deflection by dividing the belt span distance in inches by 64 See Figure O M 2 Recommended belt tension range values are on the unit fan scroll The belt tension label is on the top right hand corner of the fan scroll See Figure 4 Follow the procedure below to measure belt tension 1 Measure belt span between centers of sheaves and set the large O ring of the tension gauge at 1 inch for each inch of belt span 2 Set the load O ring at zero 3 Place the large end of the gauge at the center of the belt span Press down until the large O ring is even with the top of the belt line or the next belt as in Figure O M 2 Place a straight edge across the sheaves as a reference point See Figure O M 1 on page 99 4 Remove the gauge Note that the load O ring now indicates a number on the plunger scale This number represents pounds of force required to deflect the belt 5 Check the reading from step 4 against the values given on the unit fan scroll If necessary readjust belt tension 100 Owner Adjusting Belt Tension To adjust belt tension refer to Figure O M 2 and perform the following procedure 1 Loosen bolts A B and E on both sides of the sliding motor base See Figure O M 4 2 Loosen nuts C and D as required for motor horsepower to slide the motor on its mounting plate in the
38. Remote Human Interface Module Option The optional remote mount human interface RHI panel has all the functions of the unit mounted version except for service mode To use a RHI the unit must be equipped with an optional interprocessor communications bridge IPCB Model number digit 32 2 indicates if the ICPB was ordered with the unit If not contact your local Trane representative to order an ICPB kit for field installation The RHI can be located up to 1 000 feet 304 8 m from the unit A single RHI can monitor and control up to four self contained units if each one contains an IPCB The IPCB switches must be set as SW1 off SW2 off and SW3 on Interprocessor Communications Board Option used with RHI The interprocessor communication board expands communications from the CSC unit s UCM network to a remote human interface panel DIP switch settings on the IPCB module for this application are switches 1 and 2 off switch on 80 Owner Waterside Module Standard on AllWater Cooled Units The waterside module WSM controls all water valves based on unit configuration In addition the WSM monitors waterflow proving and the following temperatures entering water entering air low mixed air entering condenser water refrigerant circuit 3 saturated condenser evaporator frost motor winding refrigerant circuit 4 condenser evaporator motor winding Cooling Tower I
39. a constant speed However the fan may have the IGV or VFD option that modulates airflow based on supply air temperature control Pressing the stop key on the HI will turn the supply fan off The fan is on continuously when a CV unit is in occupied mode and except when a unit is in the night heat morning warmup mode During the night heat and setback mode the fan cycles on and off in response to a call for heat See Table O GI 9 for available fan horsepower Low Entering Air Temperature Sensor This is standard on all units with a hydronic coil or waterside economizer It can also be ordered as an option A thermostat limit switch is factory mounted on the unit s entering air side with a capillary tube serpentine across the coil face If the temperature falls below 35 F 2 C the fan shuts down and the waterside economizer and or hydronic heat valve options open to allow full water flow The heat output also energizes A manual reset is required The low entering air temperature setpoint is adjustable High Duct Temperature Thermostat A factory supplied temperature limit switch with reset element detects the supply air duct temperature This sensor should be field installed downstream from the unit s discharge in the supply air duct If the supply air duct temperature exceeds 240 F 115 6 C the unit shuts down and displays a diagnostic A manual reset is required at the unit The high duct temperature can be adjusted at the the
40. and may cause personal injury Note Plenum insulation must be applied properly to prevent air bypass around the plenum See Figure PR 4 Plenum Bottom View Dashed line indicates correct insulation placement Figure I PR 4 Correct plenum insulation placement SCXG SVX01B EN 41 e TRANE 42 Installation Waterside Economizer Installation Procedure 1 Install screws the top 6x and bottom 6x Economizer Loosen and pull all end devices that go through the bushing or the filter rack upper right corner of rack Remove the filter rack from the back of the unit by removing the 1 4 hex head screws from the top and bottom of the filter rack assembly The filter rack assembly will hang on the unit when the screws are removed Remove the filter rack by lifting it up off the unit Remove the economizer from the crate and position it behind the unit with the headers on the left side when facing the back of the unit Remove the plastic envelope that is taped to the economizer box assembly This envelope contains the gasket that must be installed onto the vertical side flanges of the box Install the pressure sensitive gasket to the unit side of the vertical flange on the economizer box Hang the economizer on the unit as shown in Figure I PR 5 Lift the economizer by using the holes provided in the top panel of the economizer 6 Align economizer holes
41. assumed to be an open circuit The system will use the default minimum position value RTM Analog Outputs The RTM has two 0 10 vdc outputs one for the inlet guide vane option and one for the economizer option These outputs provide a signal for one or two damper actuators There are no terminal strip locations associated with these wires They go directly from pins on the RTM circuit board to the actuator motor RTM Binary Outputs The RTM has an output with pressure switch proving inputs for the supply fan There is a 40 second delay from when the RTM starts the supply fan until the fan proving input must close A fan failure diagnostic will occur after 40 seconds This is a manual reset diagnostic and all heating cooling and economizer functions will shut down If this proving input is jumped other nuisance diagnostics will occur If the proving input fails to close in 40 seconds the economizer cycles to the minimum position This is a manual reset diagnostic External control of the fan is not recommended VAV Drive Max Output This is a single pole double throw relay rated at a maximum voltage of 24 vac 2 amps The relay contacts of this relay switch when the unit goes from the occupied mode to the unoccupied mode by means of the occupied binary input The contacts will stay switched during the unoccupied and morning warmup mode They will return to the position shown on the unit wiring diagram when the unit returns
42. be used to shut down unit operation This switch is a binary input wired to the RTM When opened the unit shuts down immediately and can be cancelled by closing the switch Refer to the unit wiring diagrams attached to the unit control panel for proper connection terminals The switch must be rated for 12 ma 24 VDC minimum This input will override all VOM inputs if the VOM option is on the unit SCXG SVX01B EN Owner Occupied Unoccupied Contacts Table 2 Sensor Resistance vs Temperature To provide night setback control if a remote panel with night setback was not Temperature F Resistance ohms Temperature F Resistance ohms 40 346 71 11 60 ordered install field supplied contact nete 5 Sages a 230 241 7 72 11 31 This binary input provides the building s 20 170 1 13 1103 occupied unoccupied status to the RTM It 1214 74 1076 can be initiated by a time clock ora 5 103 0 75 10 50 building automation system control 0 87 56 76 10 25 output The relay s contacts must be rated 5 74 65 71 10 00 for 12 ma 24 VDC minimum Refer to 10 63 8 78 9 76 the appropriate wiring diagrams 15 54 66 79 6 53 attached to the unit control panel for the 25 40 40 85 8 25 proper connection terminals in the unit 30 2485 90 155 control panel 35 30 18 100 582 Emergency Stop Input 40 26 22 105 5 21 A binary input i
43. below BAS Building automation systems CFM Cubic feet per minute CKT Circuit CV Constant volume CW Clockwise CCW Counterclockwise E A Exhaust air ECEM Exhaust comparative enthalpy module F A Fresh air GBAS Generic building automation system HGBP Hot gas bypass HI Human Interface HVAC Heating ventilation and air conditioning IGV Inlet guide vanes Inputs outputs IOD Installation owner diagnostic manual IPC Interprocessor communications IPCB Interprocessor communications bridge LH Left hand MCM Multiple compressor module MWU Morning warmup NSB Night setback O A Outside air psig Pounds per square inch gauge pressure R A Return air RH Right hand RPM Revolutions per minute S A Supply air SCM Single circuit module SZ Single zone unit airflow TCI Tracer communications module UCM Unit control modules VAV Variable air volume VCM Ventilation control module VOM Ventilation override module w c Water column WSM Waterside module ZSM Zone sensor module Special Note on Refrigeration Emissions World environmental scientists have concluded that ozone in our upper atmosphere is being reduced due to the release of CFC fully halogenated compounds The Trane Company urges all HVAC service personnel to make every effort to prevent any refrigerant emissions while installing operating or servicing equip ment Always cons
44. control drum and line pressures when pressure testing the system Excessive pressures may cause line ruptures equipment damage or an explosion which may result in injury or death 10 e TRANE A WARNING Do not exceed 200 psig when leak testing the system Damage to the unit could result or an explosion may occur causing injury or death In the event of required system repair leak test the liquid line evaporator coil and suction line at pressures dictated by local codes using the following guidelines 1 Charge enough refrigerant and dry weight Use an accurate scale or charging cylinder to determine the exact weight of the refrigerant entering the system Failure to use either a scale or acharging cylinder can lead to undercharging or overcharging resulting in unreliable operation Do not apply flame to the refrigerant container to increase refrigerant pressure Uncontrolled heat may cause excessive drum pressures and explosions resulting in injury or death and equipment damage A CAUTION Do not allow liquid refrigerant to come into contact with the skin If it does treat the injury as if the skin had been frostbitten or frozen Slowly warm the affected area with lukewarm water and seek medical attention immediately Table O M 1 Water Cooled Unit SXWG Refrigerant Charge Unit Size Circuit A Circuit B Charge 165 kg Charge 165 SXWG 20 25 11 3 25 11 3
45. detergent or with one of the com mercially available chemical coil clean ers Rinse coils thoroughly after cleaning Economizer and evaporator coils are installed so the evaporator is directly behind the economizer To clean between the coils remove the sheet metal block off Access the block off by removing the corner panels on the unit s left or right rear side A CAUTION Caution Do not clean the refrigerant coil with hot water or steam The use of hot water or steam as a refrigerant coil cleaner agent will cause high pressure inside the coil tubing and subsequent damage to the coil A CAUTION Caution To prevent damage to the unit do not use acidic chemical coil cleaners Also do not use alkaline chemical coil cleaners with a pH value greater then 8 5 after mixing without using an aluminum corrosion inhibitor in the cleaning solution SCXG SVX01B EN Owner e TRANE A WARNING Some chemical coil cleaning compounds are caustic or toxic Use these substances only in accordance with the manufacturer s instructions Failure to do so may result in injury death or equipment damage If the refrigerant coil is installed back to back with the waterside economizer coil use a cleaner that is acceptable for cleaning both types of coils Inspecting and Cleaning Coils Coils become externally fouled as a result of normal operation Dirt on the coil surface reduces it s ability to transfer heat th
46. disconnect switch does not exceed 2 0 percent the imbalance is caused by faulty wiring within the unit Be sure to conduct a thorough inspection of the unit electrical wiring connections to locate the fault and make any repairs necessary Table D T 1 Common Unit Problems and Solutions Plugged drain line Problem Possible Cause Remedy Drain pan is overflowing Plugged drain line Clean drain line Unit not level Level unit Standing water in drain pan Unit not level Level unit Clean drain line Wet interior insulation n Excess Dirt in unit Missing filters Filter Coil face velocity too high Improper trap design Drain pan leaks overflowing Co Reduce fan speed Design trap per unit installation instructions Repair Leaks Replace filters il Microbial growth mold Standing water in drain pan See Standing water in drain pan above 111 e TRANE Diagnostics Refer to the ntelliPak Self Contained Programming Guide PKG SVPO1B EN for specific unit programming and troubleshooting information In particular reference the Service Mode Menu and Diagnostic Menu sections in the programming guide Refer to the following text for general diagnostic and troubleshooting procedures Common diagnostics and troubleshooting procedures follow below A Auto Reset S A Static Pressure Limit Problem The supply air static pressure went too high Reason for Diagnostic The S A static pre
47. entire section carefully to become familiar with the procedures Disconnect electrical power to prevent injury or death from electrical shock Receiving Olnspect unit and components for shipping damage File damage claims immediately with the delivering carrier LICheck unit for missing material Look for ship with drives isolators filters and sensors that are packaged separately and placed inside the main control panel fan section or compressor section See page 9 for more information on ship with items LICheck nameplate unit data to verify against the sales order requirements Unit Location LIRemove crating from the unit Do not remove the shipping skid until the unit is set in its final position LIEnsure the unit location is adequate for unit dimensions ductwork piping and electrical connections OEnsure access and maintenance clearances around the unit are adequate Allow space at the end of the unit for shaft removal and servicing See the Service Access section on page 11 Unit Mounting LIPlace unit in its final location ORemove shipping skid bolts and skid Olf using isolators properly mount using the isolator placement sheet ORemove shipping brackets on the compressors and supply fan ORemove the unit protective shipping covers Component Overview the fan and motor shafts are parallel LlVerify the fan and motor sheaves aligned LICheck the belt tension for p
48. exhaust damper inlet guide vane positioning or variable frequency drive output and airside economizer operation based on that information Reference the RTM points list on page 77 Note Emergency stop and external auto stop stop the unit immediately emer gency stop generates a manual reset diagnostic that must be reset at the unit human interface External auto stop will return the unit to the current operating mode when the input is closed so this input is auto reset RTM Remote Economizer Minimum Position The remote minimum position potentiometer BAYSTAT023A provides a variable resistance 0 270 ohms to adjust the economizer minimum position from 0 to 100 when connected to the economizer remote minimum position input of the RTM RTM must be selected 78 Owner as the source for economizer minimum position If the RTM is the selected source for economizer minimum position and if a valid resistance per Table O GI 1 is provided to the RTM remote minimum position input the OA cfm compensation function will not operate even if enabled Default is the only possible source for economizer minimum position when using the OA cfm compensation function Table 1 Economizer Remote Minimum Position Input Resistance Input Economizer Resistance Min Position 0 30 ohms 0 30 240 ohms 0 100 Linear 240 350 ohms 100 gt 350 ohms N A Note A resistance greater than 350 ohms is
49. fan capacity and limit horsepower at lower system air require ments When in any position other than full open the vanes pre spin the air in the same direction as the supply fan rotation As the vanes approach the full closed position the amount of spin induced by the vanes increases at the same time that intake airflow and fan horsepower diminish The IGV s will close when the supply fan is off Supply Air Static Pressure Limit The opening of the IGV s and VAV boxes coordinate during unit startup and transition to from occupied unoccupied modes to prevent supply air duct overpressurization However if for any reason the supply air pressure exceeds the user defined supply air static pressure limit set at the HI panel the supply fan VFD shuts down and the IGV s close The unit will attempt to restart up to three times If the overpressurization condition still occurs on the third restart the unit shuts down and a manual reset diagnostic sets and displays at the HI Variable Frequency Drive Option The variable frequency drive VFD is driven by a modulating 0 10 vdc signal from the RTM module A pressure transducer measures duct static pressure and the VFD adjusts the fan speed to maintain the supply air static pressure within an adjustable user defined range The range is determined by the supply air pressure setpoint and supply air pressure deadband which are set at the HI panel VFD s provide supply fan motor s
50. function if applicable and the compressor staging chilled water cooling function will be cancelled b If any of the GBAS setpoint control parameters are the Hl selected setpoint sources then those setpoints will revert to the default HI setpoints c Any active GBAS output control parameters will be ignored d A failsafe function in the GBAS module will cause all GBAS outputs to be zeroed and deenergized Reset Required PAR An automatic reset occurs after communication has been restored H Heat Failure Problem The heat has failed Electric heat unit Typically this is because the electric heat section became too hot Reason for Diagnostic The heat fail input on the heat module was closed a for more than 80 seconds b for ten consecutive occurrances each lasting five seconds or more within a 210 second period Reaction An information only diagnostic is set Reset Required INFO An automatic reset occurs after the heat fail input remains open for 210 seconds continuously Heat Module Auxilliary Temperature Sensor Fail Problem The heat mod aux temp sensor input is out of range Check Sensor resistance should be between 830 ohms 200 F and 345 7Kohms 40 F If so check field unit wiring between sensor and heat module Reason for Diagnostic At least one enabled unit function has the heat module auxillary temperature input designated as its sensor and the unit is reading a
51. has the same function in temporary manual override menu as in all other menus with a few exceptions Depressing the holdtemp or program buttons while in temporary manual override menu will enter settings and begin temporary manual override run mode See Figure I P 5 0 02 DAYS HOURS SUPPLY AIR OVERRIDE TIME Figure 6 Temporary manual override menu screen Depressing the day button will toggle the ZSM between the day and hour icon Depressing the mode button will toggle the ZSM between the heat and cool icons and setpoints Depressing the erase button will cancel the override and return the ZSM to normal run mode f no button is pressed for 20 seconds the ZSM exits temporary manual override menu and enters the normal run mode ignoring the temporary manual override menu settings Temporary Manual Override Run Mode The temporary manual override run mode sends setpoint data to the UCM from the setpoint data entered in the temporary manual override menu See Figure 7 In temporary manual override run mode most of the keypad functions lock out with these exceptions The mode button still functions as in normal run mode Depressing the holdtemp button toggles the ZSM between temporary manual override menu and temporary manual override run mode If no button is pressed for 20 seconds while in the temporary manual override menu the ZSM exits to the normal run mode ignoring the
52. in the control panel for field installation in the supply air duct work The installer is responsible for providing pneumatic tubing Transducer Location Place the head assembly in an area of the ductwork that will provide an average and evenly distributed airflow pattern Use the following guidelines to determine an appropriate installation location 1 Locate the static head assembly about two thirds to three fourths of the way down the longest duct run in an area approximately 10 duct diameters downstream and 2 duct diameters upstream of any major interferences turns or changes in duct diameter 2 When installing pneumatic tubing between the head assembly and transducer in the control panel do not exceed 250 feet for 1 4 OD tubing or 500 feet for OD tubing Static Pressure Head Assembly Sheet Metal Screws provided by installer Installing the Transducer Complete the following procedure to properly install the inlet guide vane static pressure transducer 1 Mount the pressure sensing head assembly in the duct so that the sensing tip is in the middle of the duct and perpendicular to the airflow This will provide proper pressure measurement See Figure I PR 14 2 Connect the pneumatic tubing from the sensing head to the push on tubing connection in the control panel Use a plastic static pickup tubing Do not exceed 250 feet for OD tubing or 500 feet for 3 OD tubing The tr
53. non condensing Ambient Storage Conditions Temperatures 50 to 200 F Relative humidity 5 to 9596 non condensing Table I PR 9 Wiring Recommendations for the Remote HI Panel Distance from Unit Recommended to Remote HI Wire Size 0 460 feet 18 gauge 461 732 feet 16 gauge 733 1000 feet 14 gauge SCXG SVX01B EN Mounting the Remote Human Interface RHI Panel The installer must provide all mounting hardware such as hand tools electrical boxes conduit screws etc Refer to Figure I PR 32 on page 60 for the mounting hole and knockout locations Procedure Follow the procedure below for mounting the remote HI panel on a 4 by 4 electrical junction box Place the microprocessor in a clean dry location during the enclosure mounting procedures to prevent damage 1 Mount an electrical junction box in the wall so that the front edge of the box will be flush with the finished wall surface 2 Prior to mounting the panel the microprocessor module must be carefully removed from the enclosure To remove the module a Lay the remote panel face up on a flat surface and remove the locking screw from the right hand bottom end of the panel b Remove the recessed hinge screw from the left hand bottom end of the panel c Unlatch the door of the enclosure as if to open it and slide the left hand side of the door upward away from the hinge Lay it aside d With the key pad visible remove the t
54. panel door and remove the two screws on the right hand side of the key pad Swing the keypad open exposing both the wire entries and the back of the HI module Refer to Figure I PR 32 on page 60 and connect one end of the three conductor 24 volt wires to the remote panel terminal strip and ground SCXG SVX01B EN Installation e TRANE Communication Link Shielded Twisted Pair Wiring Trim the outer covering of the shielded cable back approximately 1 inch See Figure I PR 35 Do not cut the bare shield wire off Strip approximately 7 inch of insulation from each insulated wire to connect them to the terminal strip at the remote panel Connect the white lead to the positive terminal the black lead to the negative terminal and the bare shield wire to the terminal at the remote human interface panel Close the key pad plate Install and tighten the two screws removed earlier Close the outer door and install the recessed locking screw at the bottom right hand side of the enclosure to prevent accidental starting of the unit by unauthorized personnel while completing the wiring at the self contained unit At the Self Contained Unit Connect the opposite end of the three conductor 24 volt wire to the appropriate terminal strip as follows Note Although the 24 volt power is not polarity sensitive do not connect either the plus or minus terminals from the remote panel to ground at the self
55. pressure control valve that allows compressor operation down to entering water temperatures of 35 F 2 C For more information on constant and variable water flow see the Owner s section of this manual Note Units with a waterside economizer can be set from the human interface panel for variable or constant water flow Flexible Cleanout Connection Tee Union From SWUD Unit To SWUD Unit UNION Flexible Plugged Connection Cleanout Tee Figure I MR 3 Condenser water piping components for cooling tower system Pressure Thermometer T Gauge Flexible Union Connection From To SWUD Unit Shutoff Pressure Valve Plugged Gauge Thermometer ri Flexible Connection Tee Pressure Reducing Balancing Valve Figure I MR 4 Typical water piping for city or well water system 35 e TRANE 36 Installation Refrigerant Piping Air Cooled Units Only The maximum line pressure design of each refrigerant circuit is 3 psig Include the following items when designing refrigerant piping oil traps dual risers oil return etc Refer to the Trane Reciprocating Refrigeration Manual for proper line sizing and layout See the Start Up section on page 74 of this manual for instructions on refrigerant evacuation charging and superheat measurement Leak test the entire refrigeration system after all piping is complete Leak Test Remote Air cooled Units Only Units ship with a hold
56. proper direction to tension or relieve tension on the belt 3 Adjust nuts A D and bolt E Do not stretch the belts over the sheaves 4 Retighten all nuts and bolts 5 Verify tension is adjusted properly A CAUTION Do not over tension the belts Excessive tension will reduce fan and motor bearing life accelerate belt wear and possibly cause shaft failure Deflection Belt Span 64 Figure O M 2 Fan Belt Adjustment Recommended belt tension range values on the unit fan scroll To access the fan scroll face the right hand side of the unit and remove the top left panel The belt tension label is on the top right hand corner of the fan scroll See Figures O M 4 The correct operation tension for a V belt drive is the lowest tension at which the belt will not slip under the peak load conditions It may be necessary to increase the tension of some drives to reduce flopping or excessive start up squealing Force Scale Small O Ring 7 221 550505041 SY xe XxX 50 5555560 1 250 x 555250605050 9 SEC ZIX 5050 re 5 L 2 5 25 RS 3 jane Span Scale O Ring TI Figure O M 3 Belt Tension Gauge Figure O M 4 Location of fan belt label on fan scroll SCXG SVX01B EN Owner Figure O M 5 Fan assembly 25 HP Fan Motor Figure O M 6 Fan motor adjustment points SCXG SVX01B EN 101 e T
57. switches Water cooled units also include a liquid line service valve for each circuit For more detailed information see the Owner s section of this manual Figure 1 IntelliPak commercial self contained Modular Series unit SCXG SVX01B EN SCXG SVX01B EN Installation e TRANE Control Options Units can have either a thermostat control or IntelliPak UCM control network IntelliPak Unit Controls Standard controls supplied with the IntelliPak unit include the human interface HI panel with unit control module UCM hi lo inlet air temperature sensor and frost protection All setup parameters are preset from the factory Human Interface Panel The HI is unit mounted and accessible without opening the unit s front panel It allows easy setpoint adjustment using the HI keypad In addition the HI displays all unit operating parameters and conditions in a clear language display which can be configured for either English French or Spanish The optional remote human interface RHI will control up to four self contained units each containing an interprocessor communications bridge IPCB It has all the same features as the unit mounted HI except for the service mode For more information on setpoint defaults and ranges and unit programming see the IntelliPak Self Contained Program ming Guide PKG SVP01B EN A copy ships with each unit Unit Control Module The UCM provides smart
58. system has stabilized Normal start up can occur provided that Tracer Summit is not controlling the module outputs or the generic BAS is not keeping the unit off To ensure that Tracer Summit has no affect on unit operation remove Tracer wiring and make required changes to setpoint and sensor sources See the IntelliPak Self Contained Programming Guide PKG SVPO1B EN for more information Unit Startup Reference the ntelliPak Self Contained Programming Guide PKG SVP01B EN for unit operating instructions A copy ships with each unit For units with the VFD option reference Instruction Bulletin Altivar 58 Adjustable Drive Controllers and or Installation Guide Type H Controllers Keypad Display A copy ships with each VFD SCXG SVX01B EN e TRANE installation Startup Log Complete this log at unit start up Unit Unit Location Unit Voltage A B Evaporator Evaporator fan motor horsepower Evaporator fan motor amps Evaporator fan RPM actual B Evaporator System Static from test and balance report or actual readings Supply Duct Static Return Duct Static Evaporator Air Conditions with both compressors operating Enter Leaving Dry Bulb F Dry Bulb F Wet Bulb F Wet Bulb F Evaporator System CFM test and balance sheet or actual tested Compressor Amp Draw Circuit A Circuit B A B C A B C Circuit C Circuit D A B C Sucti
59. temperature for supply air temperature control supply air temperature reset supply air temperature low limiting and supply air tempering It is mounted in the supply air discharge section of the unit and connected to the RTM Supply Airflow Proving Switches This is binary input device used on units to signal the RTM when the supply fan is operating It is mounted in the supply fan section and is connected to the RTM During a request for fan operation and if the differential switch opens for 40 consecutive seconds compressor operation turns off heat operation turns off the request for supply fan operation is turns off and locks out IGV option closes economizer damper option closes and a manual reset diagnostic initiates Low Entering Air Protection Device The low entering air protection device LEATPD is a binary input on units with hydronic heat or a waterside economizer It is optional on all water cooled units If the LEATPD is on a unit with factory installed heat it is mounted in the heat section and connected to the heat module If the entering air temperature to the heating coil falls to 40 F the normally open contacts on the LEATPD close and cause the following events a the hydronic heat actuator fully opens b the supply fan turns off c the outside air damper closes d the SERVICE light at the remote zone sensor option turns on e a LEATPD diagnostic displays at the human interface panel I
60. the subbase enable or disable applicable functions i e morning warmup economizer minimum position override during unoccupied status heat installed remote zone temperature sensor 12 24 hour time display and daytime warmup During an occupied period an auxiliary relay rated for 1 25 amps 30 volts AC with one set of single pole double throw contacts activates Figure 25 BAYSENS020 Programmable night setback sensor Accessory Model Number Digit 6 J 55 e TRANE Programmable Night Setback Zone Sensor Installation Mounting Location Mount the sensor on the wall in an area with good air circulation at an average temperature Choose a location that is easily accessible and on a wall where the subbase can be mounted about 5 feet 1 5 meters above the floor Avoid mounting space temperature sensor is areas subject to the following conditions e Drafts or dead spots behind doors or in corners e Hot or cold air from ducts e Radiant heat from the sun or appliances e Concealed pipes and chimneys e Unheated or non cooled surfaces behind the sensor such as outside walls e Airflows from adjacent zones or other units PROGRAM TIME DAY ERASE 33 4 95 mm HOLD TEMP SS MODE FAN e e J 1 51 2 140 mm Figure I PR 26 BAYSENSO019 dimensions 33 4 95mm HOLDTEMP MODE L 140mm Figure
61. the system s condenser piping in reverse returns This helps balance the system by equalizing the length of supply and return pipes Multistory buildings may use a direct return system with balancing valves at each floor Install the supply riser and its return in close proximity Furnish both with permanent thermometers to check the waterside balance during start up and routine maintenance checks Also include strainers at each pump inlet and unit Install drain valves at the riser s base to allow drainage points for system flushing during start up and routine maintenance For condenser draining and header removal include a shutoff balancing valve on the entering and leaving waterside pipes drain tees and unions of each unit Also install a shutoff valve on the unit entering water pipe for condenser draining SCXG SVX01B EN Installation e TRANE Note Unit does not have floor drains Water Temperature Requirements Do not allow the entering water temperature to go below 54 F 12 2 C on units with constant water flow basic piping This will cause the compressors to shut down and the mechanical cooling function will lockout However the economizer if enabled will continue to function The compressors will reset when the entering water temperature reaches 58 F 15C Pressure Gauge Valve Pressure Gauge Water Units with variable water flow intermedi ate piping have a modulating condensing
62. to establish the minimum damper position When outdoor air conditions are above the setpoint or comparative enthalpy 93 e TRANE control setting only mechanical cooling will function and outside air dampers will remain at their minimum position Mechanical Cooling If the zone temperature cannot be maintained within the setpoint deadband using the economizer option or if there is no economizer the RTM sends a cooling request to the MCM The compressor module checks the compressor protection circuit before closing stage one After the first functional stage starts the compressor module monitors the saturated refrigerant temperature and closes the condenser fan output contact when the saturated refrigerant temperature rises above the lower limit setpoint Air Cooled Units Only The compressor module closes the condenser fan output contact when the saturated refrigerant temperature rises above the lower limit setpoint Water Cooled Units Only The WSM modulates the condenser coil water valves to maintain condenser temperature if applicable Otherwise it will check the entering condenser water temperature to ensure it is greater than 54 F or if not it will lock out cooling Auto Changeover Units with Heat When the system mode is in auto the mode will change to cooling or heating as necessary to satisfy the zone cooling and heating setpoints The zone cooling and heating setpoints can be as close as 2 F 1 1 C
63. to the occupied mode This binary output signals the VAV boxes or other terminal devices to go full open RTM Alarm Relay This is a single pole double throw relay rated at a maximum voltage of 24 vac 2 amps max Relay contacts can be programmed from the unit human interface This relay can be programmed to pick up on any one or group of diagnostics from the HI Status Annunciator Output The status annunciator output is an internal function within the RTM module on CV and VAV units It provides a diagnostic and mode status signals to the remote panel LEDs and to the HI b control of the binary alarm output on the RTM c control of the binary outputs on the GBAS module to inform the customer of the operational status and or diagnostic conditions Occupied Unoccupied Inputs There are four ways to switch to occupied unoccupied 1 Field supplied contact closure hardwired binary input to the RTM 2 Programmable night setback zone sensor 3 Tracer Summit 4 Factory mounted time clock VAV Changeover Contacts These contacts are connected to the RTM when daytime heating units with internal or external hydronic heat is required Daytime occupied heating switches the system to operate as a CV unit Refer to the unit wiring diagram for the field connection terminals in the unit control panel The switch must be rated at 12 ma 24 VDC minimum External Auto Stop Switch A field supplied switch may
64. to the unit does not exceed 400 psig Note To prevent water pump damage design system piping to provide relief when using energy saving waterside economizer valves Condensate Drain Connections The condensate drain is internally trapped Condensate drain connections are on the units left side Connect condensate drain piping to the 1 1 4 NPT female fitting using at least OD copper or 3 4 OD iron pipe Pitch the condensate line downward a minimum of 1 for each 10 of horizontal run away from the unit Be sure to install the condensate drain P trap drain plug Before starting the unit fill the trap with water to prevent negative pressure in the fan section from impeding condensate flow To facilitate drain pipe cleaning install plugged tees in place of 90 elbows Table I MR 1 Water Connection Sizes Unit Size SXWG 20 35 Direct Condenser 17 2 NPT Factory Piped 21 NPT Figure I MR 2 Direct condenser connections SCXG SVX01B EN General Waterside Recommendations Cooling Towers Cooling tower control affects the unit cycle rates Condenser water temperature swings from 10 15 degrees F may cause excessive compressor water valve and unit cycling Be sure to set the tower controls to minimize compressor unit cycling Waterside Piping Arrangements Install a condenser water pump between the cooling tower either open or closed and the self contained unit Lay out the remainder of
65. unit control with safety features and control relays for pumps dampers etc The Modular Series IntelliPak self contained unit is controlled by a microelectronic control system that consists of a network of modules These modules are referred to as unit control modules UCM In this manual the acronym UCM refers to the entire control system network These modules perform specific unit functions using proportional integral control algorithms They are mounted in the unit control panel and are factory wired to their respective internal compo nents Each module receives and interprets information from other unit modules sensors remote panels and customer binary contacts to satisfy the applicable request i e economizing mechanical cooling heating ventilation See the Owner s section of this manual for a detailed description of each modules function Optional Controls Optional controls include a disconnect switch dirty filter switch water flow switch water cooled only supply air temperature reset or external setpoint inputs Night heat morning warmup is available with electric steam or hot water heat control options The static pressure probe zone night heat morning warm up supply air temperature reset sensor options ship separate inside the unit control panel for field installation For more detailed information on the unit control options see the Owner s section of this manual Unit Nameplate The uni
66. valve will sacrifice free cooling and modulate to maintain condensing saturated temperature If not economizing the condenser valve will modulate to maintain condensing saturated temperature Water cooled units without head pres sure control will lock out mechanical cooling at entering condenser water temperatures below 54 F Mechanical cooling will resume when the entering 89 e TRANE condenser water temperature exceeds 58 F Low Ambient Control Air Cooled Units Only The low ambient modulating output on the compressor module is functional on all units with or without the low ambient option When the compressor module stages up to it s highest stage stage 2 or 3 depending on unit size the modulating output is 100 10 VDC When the control is at stage 1 the modulating output 0 to 10 VDC controls the saturated condensing temperature to within the programmable condensing temperature low ambient control point Low Ambient Compressor Lockout Air Cooled Units Only The low ambient compressor lockout utilizes an analog input device When the system is configured for low ambient compressor lockout the compressors will not operate if the temperature of the outside air falls below the lockout setpoint When the temperature rises 5 F above the lockout setpoint the compressors will operate The setpoint for units without the low ambient option is 50 F For units with the low ambient option the setpoint is 0 F The setpo
67. with the holes in the unit channel Install screws in the top 6x and bottom 6x of the economizer 7 Remove the units rear middle panel and unbraze the two copper pipes in the 2 water pipe Do not remove the pipe outlet blockoff panel 8 Remove the economizer tubing assemblies from the shipping box Check ship separate parts against those shown in Figures I PR 6 I PR 7 l PR 8 and I PR 9 Face the front of the unit to see which side the water pipe exits to determine if the unit has either right or left hand piping 9 Assemble tubing as shown in Figure l PR 6 or I PR 9 Tack all tubes in place before brazing to ensure proper fit up For right hand piped units install the ball valve actuator assembly and actuator Refer to the unit wiring diagram for wiring connection points 10 Install the pipe insulation on all pipe line to prevent sweating Install the rear middle panels Re install the filter rack on the back of the economizer coil box and affix with screws provided Waterside economizer must be lifted and hooked over flange in the opening of the unit channel Unit Top Figure I PR 5 Installing the waterside economizer SCXG SVX01B EN e TRANE Installation Waterside Economizer with Left Hand Factory Piping Components 30 9 16 ASSEMBLY 1 38 7 8 ASSEMBLY 2 ws 9 1 ASSEMBLY 3 TET Rh d Lge 16 3 8 Figure I PR Z Waterside economizer with left hand fact
68. zero The outside air damper minimum position function will revert to using the O A flow compensation function if O A flow compensation is enabled or set to the default minimum position function if O A flow compensation is disabled or not available Reset Required PAR An automatic reset occurs after communication is restored communications with the VOM Velocity Pressure Sensor Failure Problem The velocity pressure input signal is out of range Check Check field unit wiring between sensor and VCM Reason for Diagnostic The unit is reading a signal that is out of range for the velocity pressure transducer input during calibration V lt 40 mV or V gt 420 mV during operation V lt 40 mV orV gt 0 75 V UCM s Reaction The minimum airflow control function is disabled The outside air damper minimum position function reverts to using the O A flow compensation function if O A flow compensation is enabled or to the default minimum position function if O A flow compensation is disabled or not available Reset Required PAR An automatic reset occurs after the designated space pressure transducer sends a signal within range for 10 continuous seconds VOM Communications Failure Problem The RTM has lost communication with the VCM Check Field unit wiring between RTM and Reason for Diagnostic The RTM has lost communications with the VOM UCM s Reaction Ventilation override actions will not be al
69. 0 7575 1 Actuator Assembly X21080406030 14 ft Rubatex Insulation X21040098390 10 ft Gasket These items require field assembly Item Description Assembly 1 Assembly 2 Assembly 3 Assembly 4 Tube 25 x 11 3 4 Tube 2 x 20 1 4 Actuator Assembly Q m O O gt Figure I PR 8 Waterside economizer with right hand factory piping tubing assembly 9 1 33 3 8 Assembly 1 Assembly 3 5 5 8 16 3 8 Assembly 4 Assembly 2 Figure I PR 9 Detail view of ship separate tubing assemblies for waterside economizer right hand factory piping 44 SCXG SVX01B EN SCXG SVX01B EN Installation e TRANE Hydronic Coil Installation These instructions are for steam and hot water coil installation The hydronic coil assembly has a full coil piping a modu lating temperature control valve and a disc temperature limit device located in the unit near the fan on the motor frame Hydronic coils are available with either right or left hand pipe connections Piping connections are identical to the unit piping For example if you have right hand unit piping the hydronic coil will have right hand connections The hydronic coil assembly has temperature controls to keep the unit s internal cabinet temperature below 105 F to prevent motor and bearing damage Installation Procedure 1 Remove filter rack from the back of the unit Remove the inch h
70. 2 Stage Off 5 Stage On on the suction line near the TXV bulb of 3 Stage On 6 Stage Off each circuit to protect the evaporator from freezing Control Response Figure O SO 3 Typical pulldown curve for unit operating improperly outside control band If the evaporator temperature ap proaches the specified setpoint adjust able between 25 and 35 F at the HI the compressor s will cycle off The supply fan remains on to help de ice the coil The compressors will restart when the evaporator temperature has risen 10 F above the specified cutout temperature and when the compressor s have been off a minimum of three minutes This prevents rapid cycling of the compres sors Service Valves Service valves are factory installed on each circuit before and after the compressor to allow compressor isolation for servicing SCXG SVX01B EN 97 e TRANE Maintenance Procedures Air Filters Filter access doors are on the same side of the unit as the water piping connections To replace throwaway filters remove the dirty elements and install new filters with the filter s directional arrows pointing toward the fan Verify that no air bypasses the filters All unit sizes require four 16 x 25 x 2 inch 508 x 635 x 51 mm and four 20 x 25 x 2 inch 508 x 635 x 51 mm filters Inspecting and Cleaning the Drain Pan Check the condensate drain pan and drain line to ensure that the condensate drains properly at least every six mont
71. 3 Fan Diameters Return Air Figure 1 Duct connection recommen dations 33 e TRANE Water Piping Note To prevent water damage install all piping drain and vent plugs Condenser Connections Condenser water piping knockouts are in the lower left end panel If necessary remove insulation to gain access All field installed piping must conform to applicable local state and federal codes To complete condenser water connections follow the procedure below Note Four condenser waterline drain plugs ship bag in the units left end The installer must field install these four plugs using pipe thread sealer An addi tional plug are provided for units with a waterside economizer 1 Install the vent plugs in the economizer coil headers and condenser manifolds These plugs ship in a bag with the condenser drain plugs 34 Installation 2 Attach the water supply line to the inlet connection and the return line to the outlet connection Entering and leaving water connections for all condensers are factory manifolded and require only single connections for entering and leaving water If the unit has a waterside economizer and or control valves the factory pipes between these components 3 If using a cooling tower refer to Figure I MR 3 on page 35 for a typical piping circuit from the unit For typical city or well water piping see Figure I MR 4 on page 35 4 Ensure the water pressure
72. 32 35 Tons 14 3 4 15 5 8 23 3 4 Table I PR 5 Electric Heat Dimensions Metric Unit Size 1 2 Z 20Tons 273 397 705 25Tons 311 397 679 30 32 35 Tons 375 397 603 SCXG SVX01B EN Installation e TRANE Variable Frequency Drive Option VFD The variable frequency drive VFD option can only be used with IntelliPak units The VFD and VFD w bypass is available from 7 5 to 25 hp and is a Square D model Altivar 58 All VFDs are pre configured and run tested at the factory prior to shipping The VFD is wall mounted For more information on the VFD see the manuals that ship with each VFD Altivar 58 Adjustable Speed Drive Controllers Keypad Display and Altivar 58 Adjustable Speed Drive Controllers Installation Guide Type H Controllers Control and line voltage wiring from the VFD to the unit must be in accordance with all local and National Electric Codes Do not touch circuit components until main power has been turned off and charge lamp is extinguished The capacitors are still charged and can be quite dangerous Disconnect electrical power source to prevent injury or death from electric shock Do not connect or disconnect wires and connectors while power is applied to the circuit A CAUTION Use only copper conductors for electrical unit connections to prevent equipment damage VFD Mounting Requirements Proper location of the VFD is important to achieve pr
73. 337 292 p pee LJ LJ TOP VIEW SHOWN WITH VERTICAL DISCHARGE OPTION SCXG SVX01B EN 21 e TRANE Hot Water Coil AIR INLET 22 Installation HOT WATER OUTLET CONNECTION HOT WATER OUTLET CONNECTION Hot Water Coil Dimensions English inches UnitTon A B C D E F G H J 20 35 277 539 16 73 4 167 431 5 7 Hot Water Coil Dimensions Metric mm UnitTon A B C D E F G H J 20 35 946 1365 422 1867 378 413 1099 14 187 SCXG SVX01B EN e TRANE Installation Steam Coil VACUUM TRAP CONNECTION CONDENSATE RETURN Z AIR INLET P VACUUM TRAP CONNECTION Q CONDENSATE RETURN STEAM INLET CONNECTION R Steam Coil Dimensions English inches Unit Ton A B C D E K L M N P Q R 20 35 371 53 16 737 10 22 3 157 1 41 93 43 Steam Coil Dimensions Metric mm UnitTon A B C D E K L M N P Q R 20 35 946 1365 422 1867 276 572 86 403 25 1041 238 111 SCXG SVX01B EN 23 e TRANE Installation eA 7 Installation Waterside Economizer 10 254mm 53 3 4 1365mm AIR INLET SCXG SVX01B EN 25 TRANE Installation SEE DETAIL A ON PAGE 27 LIFT ON BOTTOM EDGE OF ECONOMIZER TYP
74. 4 5 vde 50 to 90 F CV and VAV Occupied Zone Heating Setpoint 0 5 to 4 5 vdc 50 to 90 F CV units onl Unoccupied Zone Heating Setpoint 0 5 to 4 5 vde 50 to 90 F CV and Supply Air Cooling Setpoint 0 5 to 4 5 vde 40 to 90 F VAV units only NI Air Hydronic Heating Setpoint 0 5 to 4 5 vdc 40 to 180 F VAV units only Space Static Pressure Setpoint 0 5 to 4 5 vdc 0 03 to 0 30 IWC Supply Air Pressure Setpoint 0 5 to 4 5 vdc 0 0 to 5 0 IWC VAV units only Note 1 Input voltages less than 0 5 vdc are considered as 0 5 vdc input signal is lost the setpoint will clamp to the low end of the setpoint scale No diagnostic will result from this condition 2 Input voltages greater than 4 5 vdc are considered to be 4 5 vdc 3 The actual measured voltage is displayed at the HI Table O GI Z GBAS Input Voltage Corresponding Setpoints Volts Temp Volts Temp Volts Temp Volts Temp 0 6 51 17 61 27 71 28 81 07 52 18 62 28 72 29 82 08 53 19 63 29 73 3 0 83 0 9 54 2 0 64 3 0 74 3 1 84 1 0 55 2 1 65 3 1 75 3 2 85 1 1 56 2 2 66 3 2 76 3 3 86 1 2 57 2 3 67 3 3 77 34 87 1 3 58 2 4 68 34 78 3 5 88 1 5 59 2 5 69 3 5 79 3 6 89 83 e TRANE Waterside Components Waterside components consist of water piping water valves water flow switch option water cooled condensers SXWF only and the economizer option Water Purge This user definable feature allows the user to select a purge schedule to auto
75. 52 100 SCRG 25 47 100 SCRG 32 52 100 SCXG SVX01B EN e TRANE Owner band according to the desired unit performance Increasing the control band 7 1 reduces the equipment cycle rate and 1 1st stage on increases the maximum potential supply 2 2 2nd stage on air temperature deviation from setpoint 3 3rd stage on Conversely decreasing the control band 3 reduces the maximum potential tem perature deviation but increases the compressor cycle rate Follow these recommendations concern ing the supply air temperature control band settings based on expected unit sizing 2 Cooling stage unit 9 F 3 Cooling stage unit 7 F Typical Pulldown Response 4 Cooling stage unit 6 F Figure O SO 2 Typical pulldown curve for unit operating properly within control band Low Ambient Compressor Lockout This function will lock out the compressor if the outdoor air temperature sensor reads an outdoor temperature below the low ambient compressor lockout temperature setpoint This setpoint is adjustable at the human interface panel Compressors will lock Out when outdoor I c air temperature falls below that selected temperature and will start again when Set the temperature rises 5 F above the Point setpoint Control Band Evaporator Coil Frost Protection FROSTAT The FROSTAT system eliminates the need for hot gas bypass It utilizes an 1 Stage On 4 Stage Off evaporator temperature sensor mounted
76. 6 416 378 152 1178 521 82 30 SCXG SVX01B EN Installation e TRANE Flexible Horizontal Discharge Plenum SCXG SVX01B EN Flexible Horizontal Discharge Plenum Dimensions English inches 20 35 Tons A B C Low Height 35 177 86 5 Standard Height 35 25 1 86 Flexible Horizontal Discharge Plenum Dimensions Metric mm 20 35 Tons A B C LowHeight 889 438 2197 Standard Height 889 641 2197 e TRANE Installation Table I DW 1 Unit Weights English SCWG SCRG SIWG SIRG 2 Row 4 Row Unit Base Airside Waterside Waterside Heating Size Weight Economizer Economizer Economizer Coil Box Ibs Ibs Ibs Ibs Ibs SCWG SIWG 20 2620 273 488 584 460 25 2730 273 488 584 460 30 2864 273 488 584 460 35 3000 273 488 584 460 SCRG SIRG 20 2344 273 488 584 460 25 2479 273 488 584 460 32 2614 273 488 584 460 Notes 1 All unit weights include refrigerant water inlet guide vanes and controllers electric heat and valves 2 Add 150 Ibs to total weight to obtain approximate shipping weight 3 Flexible horizontal discharge plenum option weights Standard height plenum 352 Ibs Low height plenum 262 165 4 VFD weights are on pages 28 and 30 Table I DW 2 Unit Weights Metric SCWG SIWG SCRG SIRG 2 Row 4 Row Unit Base Airside Waterside Waterside Heating Size Weight Economizer Economizer Economizer Coil Box Kg Kg Kg Kg Kg SCWG SIWG 20 13
77. 65 195 65 155 210 25 1400 195 65 155 210 30 1500 225 85 175 210 35 1640 225 130 230 210 SCRG SIRG 20 1325 195 65 155 210 25 1425 225 85 175 210 32 1530 225 130 230 210 Notes 1 All unit weights include refrigerant water inlet guide vanes and controllers electric heat and valves 2 Add 68 kg to total weight to obtain approximate shipping weight 3 Flexible horizontal discharge plenum option weights Standard height plenum 160 kg Low height plenum 119 kg 4 VFD weights are on pages 28 and 30 32 SCXG SVX01B EN SCXG SVX01B EN Installation e TRANE Duct Connections Disconnect electrical power source before servicing the unit Failure to do so may result in injury or death from electrical shock or entanglement in moving parts Return air enters the rear of the unit and conditioned supply air discharges through the top Attach supply air ductwork directly to the unit s top panel around the fan discharge opening A duct collar is not provided Note Units equipped with the flexible horizontal discharge plenum option may include a duct collar when holes are factory cut If discharge openings are field cut refer to the Plenum Installation section Install all air ducts according to the National Fire Protection Association standards for the Installation of Air Conditioning and Ventilation Systems other than Residence Type NFPA 90A and Residence Type Warm Air Heating and Air Conditioning Systems
78. 8 Installing the Transducer 49 ntelligent Copy 70 IntelliPak Unit Controls 5 ntermediate Water Piping 84 Interprocessor Communication Bridge Module Wiring 61 nterprocessor Communications Board 80 PCB 80 K Keypad Lockout 67 Keypad Operation for Temporary Manual Override Men 67 68 L Leak Test 36 LEATPD 90 Literature Change History 2 Low Air Temp Limit Trip 114 Low Ambient Compressor Lockout SCXG SVX01B EN e TRANE 90 97 Low Ambient Control 89 90 Low Ambient Sensor 86 Low Entering Air Protection Device 90 Low Entering Air Temperature Sensor 86 Low Pressure Control 89 Low Pressure Control Open 114 Low Pressure Control Open 114 Low Voltage AC Field Wiring Connections 61 M Maintenance Procedures 98 Manual Override 73 Manual Reset SA Static Press Limit 114 MCM 80 MCM Communications Failure 114 Measuring Belt Tension 100 Mechanical Cleaning of Condenser and Economizer Coils 108 Mechanical Cooling 94 Minimum Outside Air Setpoint w VCM Module Traq 81 Mode Button 67 Mode Input Failure 114 Model Number Description 6 Monthly Checklist 110 Morning Warmup 91 Mounting Location 53 Mounting the Remote Human Interface 59 Mounting the Subbase 53 MWU 91 N NSB Panel Comm Failure 115 NSB Panel Zone Temperature Sensor Failure 115 O A Humidity Sensor Failure 115 O A Temp Sensor Failure 115 Occupied Sequence Of Operation 93 Occupied Zone Heat Setpoint Failure
79. AS VOM and RHI N GBAS TCI and RHI P VOM TCI and R GBAS VOM TCI and RHI 0 None Digit 34 Agency T UL Agency Listing 0 None Digit 35 Filter Type 1 2 inch Construction Throwaway 2 2 inch Med Eff Throwaway Digit 36 Miscellaneous Control Option Low Entering Air Temp Protect Device LEATPD High Duct Temp T Stat Plenum High Static Switch Kit for Heat Mode Output w t stat AandB AandC Band C A B and C None BAYSTATOS7A 2 Heat 2 Cool Programmable Thermostat 0 None Digit 7 Mixed Air Temperature Protec tion Kit field installed 1 Mixed Air Temperature Protection Kit 0 None Digit 8 Carbon Dioxide Sensor field installed 1 Carbon Dioxide Sensor Kit 0 None Digit 9 Future Option 0 None Digit 10 11 Design Sequence AO A Design e TRANE installation AfterShipment Accessory Model Number 20 4 2 A B2 065 B A 1 010 AACF A 1 10 20 123 4 5 67 8 9 1011 12 13 14 1516 171819 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Digit 1 Parts Accessories P Parts Accessories Digit 2 Unit Model S Self Contained Digit 3 Shipment A After Unit Digit 4 Development Sequence F Signature Series G Modular Series Digit 5 Condenser Medium W Water Cooled R Remote Air Cooled Digit 6 Refrigerant Circuit Configuration N Independent Water Cooled
80. Assembly section on page 14 before completing this step Test lift the unit to determine exact unit balance and stability before hoisting it to the installation location See Figure 7 and 8 on page 13 for typical rigging procedures including cautions and proper uses of such equipment as fork lifts spreader bars and hooks 4 Remove the skids from under the unit See the Rigging and Handling section on page 12 Refer to the Skid Removal section on page 16 If you find internal damage file a claim immediately to the delivering carrier 5 Remove the protective shipping covers from the unit Refer to the Unit Protective Covers section on page 39 Note Unit height and connection locations will change if external vibration isolators are used The unit may be raised an additional 5 7 5 inches with spring type isolators Note Unit height and connection locations will change if the unit is constructed to be split a part in the field See unit submittal drawings for connection locations 6 Electrical supply power must meet specific balance and voltage requirements as described in the Electrical Requirements section on page 37 7 Water cooled units only model SXWG The installer must furnish and install a condenser main and standby water pump cooling tower pressure gauges and all components for the waterside piping See the Water Piping section on page 34 for general waterside
81. BOTH ENDS Airside Economizer Dimensions English inches Unit Size A B C D E F F2 G G Hm HQ J K L M SCWG SIWG 20 25 36 655 37 741 67 56 49 231 20 5 7 207 17 17 49 SCRG SIRG 20 SCWG SIWG 30 35 36 65 37 747 6 61 623 28 207 3 7 207 17 5 62 SCRG SIRG 25 32 Airside Economizer Dimensions Metric mm Unit Size A B C D E 1 F 2 GA G 2 1 H 2 J K L M SCWG SIWG 20 25 914 1667 940 1886 156 1435 1264 591 521 143 178 521 435 305 1264 SCRG SIRG 20 SCWG SIWG 30 35 914 1667 940 1886 156 1559 1594 714 521 83 178 521 435 140 1594 SCRG SIRG 25 32 26 SCXG SVX01B EN Detail A DETAIL A SHOWS THE AIRSIDE ECONOMIZER WITH ALL 1 DAMPER CONFIGURATIONS CURRENTLY AVAILABLE AND 2 ALL OPENING DIMENSIONS NECESSARY FOR DUCT WORK Detail STATIC PRESSURE TUBE FROM UNIT 5 gt STATIC PRESSURE TUBE FROM UNIT AND CONNECTOR ON ECONOMIZER ECONOMIZER GASKET Factory provided for field installation SCXG SVX01B EN 27 e TRANE Variable Frequency Drive 28 Variable Frequency Drive Dimensions English inches B Installation K MOUNTING HOLES 4X FRONT VIEW RIGHT SIDE VIEW Motor HP Voltage A B C D E F G H J K Weight 75 200V 9 7 8 7 29 WV 127 V 87 7 26168 75 460V 6 6 Choo 11 S 00 7h 3o o 77 OW 15lbs 10 200V 9 U 8 7 12 7
82. Chemical Clean Full Cap 4 row Chemical Clean Low Cap 2 row Mechanical Clean Full Capacity 4 row Ship Separate Mechanical Clean Low Capacity 2 row Ship Separate G Chemical Clean Full Capacity 4 row Ship Separate H Chemical Clean Low Capacity 2 row Ship Separate 0 None Digit 28 Ventilation Control Airside Econ w Traq Damper Top O A Inlet C Airside Econ w Standard Dampers Top O A Inlet E Airside Econ w Traq Damper and Comparative Enthalpy Top O A Inlet F Airside Econ w Std Dampers and Comparative Enthalpy Top O A Inlet G Trag Damper Ventilation Interface n Installation e TRANE Ve 2 For 2 Pos Cntrl Interface Non igit 29 Water Piping Right Hand Condenser Connection Left Hand Condenser Connection Right Hand Basic Piping Left Hand Basic Piping Right Hand Intermediate Piping Left Hand Intermediate Piping Right Hand Basic w Flow Switch Left Hand Basic w Flow Switch Right Hand Intermediate w Flow Switch M Left Hand Intermediate w Flow Switch 0 None a ae Digit 30 Condenser Tube Type A Standard Condenser Tubes B 90 10 CuNi Condenser Tubes 0 None Digit 31 Compressor Service Valves 1 With Service Valves 0 None Digit 32 Miscellaneous System Control Timeclock Interface for Remote Dirty Filter Switch 1 2 1 2 1 2 None 2 3 4 5 6 7 0 Self Con
83. HCFC22 R22 rather than CFC12 R12 or any other fully halogenated refrigerants Be aware of any new leak test methods which eliminate refrigerant as a trace gas When cleaning system components or parts do not use CFC11 R11 or CFC 113 R113 Refrigeration system clean up methods using filters and dryers are recommended Do not use solvents which have ozone depletion factors Properly dispose of used materials eTake extra care to properly maintain all service equipment directly supporting refrigerant service work such as gauges hoses vacuum pumps and recycling equipment e Stay aware of unit enhancements conversion refrigerants compatible parts and manufacturer s recommendations that will reduce refrigerant emissions and increase equipment operating efficiencies Follow specific manufacturer s guidelines for conversion of existing systems To assist in reducing power generation emissions always attempt to improve equipment performance with improved maintenance and operations that will help conserve energy resources Refrigerant Leak Testing Do not work in a closed area where refrigerant or nitrogen gases may be leaking A sufficient quantity of vapors may be present and cause injury or death Do not use oxygen acetylene or air in place of refrigerant and dry nitrogen for leak testing A violent explosion may result causing injury or death Always use a pressure regulator valves and gauges to
84. I PR 27 BAYSENS020 dimensions Installation Procedure 1 Remove the zone sensor module from the subbase Carefully hold the zone sensor module with one hand and firmly grasp the subbase with the other 56 Installation See Figure I PR 27 To remove the zone sensor module from the subbase gently pull away and upward CAUTION The zone sensor module is an electronic sensitive device Do not touch printed circuit board electronic components or connector pins Handle plastic housing only to prevent damage to electronic components Figure I PR 28 Removing the zone sensor module from the subbase 2 After disassembly protect the internal surfaces from contact with objects or substances that could cause damage 3 Remove the terminal block from subbase and set aside for wiring Discard the tape 4 Mount the zone sensor module using the mounting hardware included in the shipping package The mounting hardware is contained in single plastic bag and includes Plastic wall anchors 3 x e Mounting screws 3 x The zone sensor module can mount directly to a wall or to a junction box mounted to wall To mount to junction box you must have the mounting plate and adapter kit BAYMTPLOO3 Installation instructions are enclosed with the mounting plate 5 To mount the zone sensor module directly to a wall a Hold the subbase in position and mark the three mounting hole locations on the wall b Drill three 3
85. NE Su Mo Tu We Th Fr Sa NOWE TAFTS MODE CL bL OFF Desired L HEAT HEAT COOL AM PM OVERRIDE AUTO T I AMAN II I OCCUPIED Ton ER ERN AUTO ROOM TEMP Figure I P 5 Override run mode screen Temporary Override Run Mode The temporary override run mode sends setpoint data to the Unit Control Module UCM from the setpoint data entered in the temporary manual override menu In temporary override run mode most of the keypad functions lock out with these exceptions e The mode button still functions as in normal run mode e The fan button still functions as in normal run mode e Depressing the holdtemp button toggles the ZSM between the temporary manual override menu and override run mode if no button is pressed for 20 seconds while in temporary manual override menu the ZSM exits to normal run mode ignoring the temporary override settings Depressing either the T or arrow while in the override run mode will cause the ZSM to toggle to the temporary manual override menu The erase button will turn off the check filter icon if displayed e Simultaneously depressing and holding the positive and negative sides of the minus and plus for four seconds will lock out the keypad eTime is not adjustable in this mode The program button is disabled 68 Installation Keypad Operation for Temporary Manual Override Menu The keypad
86. Only During occupied mode if the zone temperature falls to a preset user defined zone low limit temperature setpoint the unit is put into daytime warmup The system changes over to CV heating the VAV boxes drive full open However unit airflow modulation control operates to maintain duct static setpoint and full heating capacity is provided until the daytime warmup setpoint is reached The unit is then returned to normal occupied mode Supply Air Tempering Supply air tempering is available on units without volume control and with hot water steam or electric heat or units with supply air temperature control with steam or hot water heat When the unit is in heat mode but not actively heating if the supply air temperature drops to 10 F 5 5 C below the occupied zone heating temperature setpoint electric heat will stage on or the hydronic valve will modulate to maintain a minimum supply air temperature The unit transitions out of heat mode if the supply air temperature rises to 10 F 5 5 C above the occupied zone heating temperature setpoint Changeover This mode only functions on units with supply air temperature control and hydronic heat When the changeover binary input is closed the unit will control to a discharge air heating setpoint This setpoint is entered at he can be a higher temperature than the supply air cooling setpoint This function maintains duct static pressure SCXG SVX01B EN Compr
87. RANE 102 Owner Refrigerant System Special Note on Refrigerant Emissions Follow the Trane recommended procedures on operation maintenance and service to ensure refrigerant conservation and emission reduction Also pay specific attention to the following e Whenever removing refrigerant from air conditioning or refrigerating equipment recover for reuse recycle reprocess reclaim or properly destroy it e Always determine possible refrigerant recycling or reclaiming requirements before beginning recovery Questions about recovered refrigerants and acceptable refrigerant quality standards are addressed in ARI Standard 700 e Use approved containment vessels and safety standards Comply with all applicable transportation standards when shipping refrigerant containers eTo minimize emissions while recovering refrigerant use recycling equipment Always attempt to use methods which will pull the lowest possible system vacuum while recovering and condensing refrigerant into containment When leak checking with trace refrigerant and nitrogen use HCFC22 R22 rather than CFC12 R12 or any other fully halogenated refrigerants Be aware of any new leak test methods which eliminate refrigerant as a trace gas e When cleaning system components or parts do not use CFC11 R11 or CFC113 R113 Refrigeration system clean up methods using filters and dryers are recommended Do not use solvents which have ozone depleti
88. Reaction Off or close requests are issued as appropriate to the following functions a Compressor staging chilled water cooling control b Heat operation c Supply fan control and proof of operation d Exhaust fan control and proof of operation e Exhaust actuator control f Outside air damper control g On units IGV VFD control Reset Required PMR A manual reset is required after the emergency stop input recloses The diagnostic can be reset by the HI Tracer Summit or by cycling power to the RTM Entering Cond Water Temp Sensor Fail Problem Activation Conditions temperature lt 50 F or temperature gt 209 F and unit configured for water cooled condenser c Time to React 10 sec lt T lt 20 sec d Diagnostic Text Human Interface Display ENT COND WATER TEMP SENSOR FAIL e Actions to be Initiated A Lockout All Ckts request is issued to the Compressor Staging Function f Reset An automatic reset occurs after the entering condenser water temperature input returns to within range continuously for 15 seconds Entering Water Temp Sensor Fail a Data used module packet byte bit SCXG SVX01B EN Diagnostic Troubleshooting e TRANE WSM 01 18 05 b Activation Conditions temperature lt 50 F or temperature gt 209 F and unit configured with water cooled condenser and or economizer c Time to React 10 sec lt T lt 20 sec d Diagnostic Text Human Interf
89. Temporary Manual Override While in normal run mode depressing the hold temp button toggles the ZSM to the temporary manual override menu The mode will override any number of programmed setpoints through any of the 28 programmed periods After entering setpoints and length of override time these new settings are used in place ofthe setpoints programmed for normal run mode Time Button While in the program menu each time you press and release the positive or negative side of the time button the time will advance or decrease by ten minute increments If you press and hold the positive or negative side minus and plus keys the ZSM will increment rapidly When the display is in the normal run mode each time you press and release the positive or negative side of the time button minus and plus keys the time will advance or decrease by one minute If you press and hold the positive or negative side minus and plus keys the ZSM will increment rapidly Note Blank temperature settings may be entered at any of the four daily periods When a setpoint is left blank and in an occupied condition the ZSM will default to the last occupied setpoint Keypad Lockout If you simultaneously depress and hold both the positive and negative sides of the minus and plus keys for four seconds the lock icon will appear and all keypad functions will lock out If you repeat this operation the lock icon will disapp
90. Those four periods are Morn ing Day Eve ning and Night To exit the program menu depress the program button for two seconds Morn Day Eve Nite Su Mo Tu We Th Fr Sa mF oe Desired oan at 1 HEAT COOL AM PM OCCUPIED Figure I P 3 Display Program Menu Screen Program Menu BAYSENSO20 Only Note After toggling to the program screen the week is divided into seven days with each day divided into four periods Setpoint programming depends on the setting status occupied or unoccupied and whether or not the heat installed modulated heat morning warmup or daytime warmup options are enabled In the occupied period the cool supply air temperature is always set If heat installed and modulated heat options are on the supply air heat is also set during occupied periods The warmup tempera ture is also set in occupied periods if heat installed and warmup options are enabled During unoccupied periods only the desired room temperature setpoints are entered Each unoccupied period has a heat and cool setpoint and both setpoints are offered during programming Blank temperature settings may also be entered When a setpoint is blank the program will default to the last setpoint of its type If there is no setpoint of its type the default setpoint is used If all setpoints in the time period are blank is erased after exiting from the program menu The ZSM has independent seven da
91. abled Reset Required PAR An automatic reset occurs after communication has been restored 0 O A Humidity Sensor Failure Problem The outside air humidity sensor data is out of range Check Check field unit wiring between the sensor and RTM Reason for Diagnostic The unit is reading SCXG SVX01B EN Diagnostic Troubleshooting e TRANE a signal that is out of range for the outside air humidity sensor humidity lt 5 or humidity gt 100 5 Reaction The economizer enable r e enthalpy function reverts to dry bulb temperature changeover Level 1 control Reset Required PAR An automatic reset occurs after the OA humidity input returns to its allowable range for 10 seconds O A Temp Sensor Failure Problem The outside air temperature sensor input is out of range Check Sensor resistance should be between 830 ohms 200 F and 345 7 Kohms 40 If so check field unit wiring between sensor and RTM Reason for Diagnostic The unit is reading a signal that is out of range for the outside air temperature input on the RTM temp lt 55 F or temp gt 209 F Reaction These unit functions occur low ambient compressor lockout disables e O A damper drives to minimum position e on units with S A temp reset type selected as O A temp reset the reset type reverts to none for the duration of the failure Reset Required PAR an automatic reset occurs
92. ace Display ENTERING WATERTEMP SENSOR FAIL e Actions to be Initiated A Disable Water Side Economizer request is issued to Water Side Economizer Temperature Enable Function f Reset An automatic reset occurs after the Entering Water Temp input returns to within range continuously for 10 seconds Evap Temp Sensor Failure Circuit 1 2 3 or 4 Problem The evaporator temperature sensor ckt 1 2 3 or 4 is out of range Check Sensor resistance should be between 830 ohms 200 F and 345 7Kohms 40 F If so check field unit wiring between sensor and MCM SCM Reason for Diagnostic The unit is reading a signal that is out of range for the circuit 1 evaporator temperature sensor input temp lt 55 F or temp gt 209 Reaction The coil frost protection function for the refrigeration circuit 1 2 3 or 4 only is disabled Reset Required PAR An automatic reset occurs after the 1 2 3 or 4 evap temp input returns to its allowable range for 10 seconds G GBAS 0 5 VDC Module Comm Failure Problem The RTM has lost communication with the GBAS module Check Field unit wiring between RTM and GBAS Reason for Diagnostic The RTM has lost communication with the GBAS module UCM s Reaction The UCM will initiate the following actions If the demand limit input was closed prior to the communications loss then the demand limit commands issued to the heat operation
93. after the O A temperature input returns to its allowable range To prevent rapid cycling of the diagnostic there is a 10 second delay before the automatic reset Occupied Zone Heat Setpoint Failure Problem The occupied zone heat setpoint input is out of range Reason for Diagnostic The input designated as occupied zone heating setpoint source is out of range for the outside air temperature input on the RTM temp lt 45 F or temp gt 94 F UCM s Reaction The active occupied zone heating setpoint reverts to the default value Reset Required PAR an automatic reset occurs after the occupied zone heating setpoint input returns to its allowable range for 10 continuous seconds or after a different occupied zone heating setpoint selection source is user defined R Return Air Humidity Sensor Failure Problem On units with both airside economizer and comparative enthalpy installed the return air humidity sensor input is out of range Check Check field unit wiring between the sensor and ECEM Reason for Diagnostic The unit is reading a signal that is out of range for the return air humidity sensor humidity lt 5 or humidity gt 100 UCM s Reaction The economizer enable r e enthalpy function reverts to reference enthalpy changeover Level 2 control Reset Required PMR An automatic reset occurs after the RA humidity input returns to its allowable range continuously for 10 seconds Retum Air T
94. age immediately by phone and mail Request an immediate joint inspection of the damage by the carrier and consignee O Notify your Trane representative of the damage and arrange for repair Have the carrier inspect the damage before making any repairs to the unit Shipping Covers Detail A C Channel Figure 1 Typical unit mounted on shipping skid Filter Channels Note 1 Filter Channels Note 1 Supply and Control Wiring Knockouts Metal Channel Shipping Skid Optional spring isolators or isopads strapped inside of unit e TRANE Installation Installation Preparation Before installing the unit perform the following procedures to ensure proper unit operation 1 Verify the floor or foundation is level Shim or repair as necessary To ensure proper unit operation install the unit level zero tolerance in both horizontal axis Failure to level the unit properly can result in condensate management problems such as standing water inside the unit Standing water and wet surfaces inside units can result in microbial growth mold in the drain pan that may cause unpleasant odors and serious health related indoor air quality problem 2 Allow minimum recommended clearances for maintenance and routine service See Service Access section on page 11 3 Position the unit and skid assembly in its final location If unit shipped split apart follow the procedure in the Split Apart Unit
95. agnostic there is a 10 second delay before the automatic reset RTM Data Storage Error Problem There was a data transmission error Check This can be caused by an intermittant power loss Turn the unit off for 1 2 minutes then back on again If diagnostic persists then the RTM may need to be replaced Reason for Diagnostic An error occurred while the RTM was writing data to its internal non volitile memory EEPROM Reaction An information only diagnostic will be displayed at the Human Interface Reset Required INFO A manual reset may be made at the Human Interface at Tracer Summit or by cycling power to the RTM RTM Zone Sensor Failure 116 Diagnostic Troubleshooting Problem The RTM zone temperature sensor input is out of range Check Sensor resistance should be between 830 ohms 200 F and 345 7 Kohms 40 F If so check field unit wiring between sensor and RTM Reason for Diagnostic At least one enabled unit function has the RTM zone temperature input designated as its sensor and the unit is reading a signal that is out of range for this input temp 55 F or temp 150 F UCM Reaction The functions with the RTM zone temperataure input deignated as their sensor are disabled Reset Required PAR an automatic reset occurs after the designated zone temperature signal returns to its allowable range To prevent rapid cycling of the diagnostic there is a 10 second delay
96. ak w o Vol CTRL w Supply Air Temp Ctrl 8 Thermostat Interface 9 Thermostat Interface w Anti Short A AB Thermostat Interface w Compressor Start Delay B Thermostat Interface w Anti Short CycleTimer and Comp Start Delay Digit 10 11 Design Sequence BO B Design Digit 12 Unit Construction Vertical Discharge Vertical Discharge with Double Wall 6 C D mm G H Horizontal Discharge Horizontal Discharge w Double Wall Vertical Discharge Ship Separate Vertical Discharge w Double Wall Ship Separate Horizontal Discharge Ship Separate Horizontal Discharge w Double Wall Ship Separate igit 13 Plenum Type D B C E F H J p M R U V 0 Std Plenum w Factory Cut Holes Low Plenum w Factory Cut Holes Std Plenum w Field Cut Holes Low Plenum w Field Cut Holes Std Plenum Double Wall Perf w Field Cut Holes Low Plenum Double Wall Perf w Field Cut Holes Std Plenum w Factory Cut Holes Ship Separate Low Plenum with Factory Cut Holes Ship Separate Std Plenum w Field Cut Holes Ship Separate Low Plenum w Field Cut Holes Ship Separate Std Plenum Double Wall Perf w Field Cut Holes Ship Separate Low Plenum Double Wall Perf w Field Cut Holes Ship Separate Without Plenum Digit 14 Motor Type 1 2 3 Std Efficiency ODP Premium Eff ODP Std Efficiency Totally Enclosed
97. amper position to compensate for VAV supply air modula tion is inherent in the unit controls and can be enabled by the operator The mixing box fabrication is 16 gauge galvanized steel Opposed low leak damper blades are fabricated from 16 gauge galvanized steel and rotate on rustproof nylon bushings A factory installed 24V modulating spring return actuator controls both damper positions Airside Economizers with Traq Damper Outside air enters the unit through the Traq damper assembly and is measured by velocity pressure flow rings The velocity pressure flow rings are connected to a pressure transducer solenoid assembly which compensates for temperature swings that could affect the transducer The ventilation control module VCM utilizes the velocity pressure input the RTM outdoor air temperature input and the minimum outside air CFM setpoint to modify the volume CFM of fresh air entering the unit as the measured airflow deviates from setpoint When the optional preheat temperature sensor is installed at the auxiliary temperature on the VCM and the preheat function is enabled the sensor will monitor the combined averaged fresh air and return air temperatures As this mixed air temperature falls below the preheat actuate temperature setpoint the VCM activates the preheat binary output to control a field installed heater The output deactivates when the tem perature rises 5 F above the preheat actuate tempera
98. and cooling functions VAV units Reset Required PAR an automatic reset occurs after the designated S A temperature input returns to its allowable range To prevent rapid cycling of the diagnostic there is a 10 second delay before the automatic reset Supply Fan Failure Problem There is no supply airflow indication after the supply fan has been requested on Check Check belts linkages etc on the Supply Fan assembly If these are ok check field unit wiring between RTM and supply fan If the supply fan will run in service mode then verify airflow proving switch and wiring Reason for Diagnostic The supply airflow input is detected OPEN for 40 continuous seconds during any period of time in which the supply fan binary output is ON between 830 ohms 200 F and 345 7Kohms 40 F If so check field unit wiring between the sensor and MCM This input is ignored for up to 5 minutes after the supply fan is first started until airflow is first detected UCM s Reaction OFF or Close requests are issued as appropriate to the following functions a Compressor staging chilled water control b Heat operation c Supply fan control and proof of operation d Exhaust fan control and proof of operation e Exhaust actuator control f Economizer actuator control g IGV VFD control Reset Required PMR A manual reset is required anytime after the diagnostic is set The diagnostic can be reset at the HI Trace
99. ansducer inside the control panel picks up low side or reference pressure Note If plastic tubing pulls away from a connection trim it back before replacing it on the fitting Stretched tubing may leak and cause faulty control Duct Pressure Sensor Note Place sensor inlet perpendicular to airflow Figure I PR 14 Static pressure sensor installation 49 e TRANE 50 Installation Remote Mounted Thermostat Option Mount the thermostat in the largest space occupied by the most people for the best average temperature sensing The thermostat should be mounted about 5 feet from the floor in contact with freely circulating air but not with major drafts Avoid the following areas e Behind doors or in corners where ther is no free circulation e Locations where the sun s rays or infrared radiation from appliances or fireplaces may affect thermostat operation e Surfaces subject to vibration On walls that contact outside air Adjacent to or in line with conditioned air discharge grilles or doorways Remote Mounted Thermostat Wiring After the thermostat is mounted wire the thermostat back to the unit control panel according to the correct diagram shown on inside of panel door The total resistance of the thermostat and the control wiring to each terminal must not exceed 1 ohm Table I PR 6 provides recommended wire sizes for length of run Wiring the Remote Air cooled CCRC and SCRG
100. arameters to the other weekend day Remote Panel Indicator Signals From UCM to ZSM The unit control module UCM can send four signals to the ZSM Heat Cool e Service Each of these four signals have three different conditions See Table I P 3 e Off e Flashing 70 Installation Table 2 Zone Sensor BAYSENS020 Option Menu Settings Option Description Value Factory Setting 1 Morning Warmup 0 Disabled 0 1 z Enabled 2 Economizer minimum 0 Disabled 1 Position override 1 Enabled 3 Temperature Scale 0 Fahrenheit 0 1 Enabled 4 Heat Installed 0 0 1 Yes 5 Time Clock 0 12 hours 0 1 24 hours 6 Hydronic Heat 0 No 0 1 Yes 7 Daytime Warmup 0 Disabled 0 1 Enabled 8 Programmable Days Week 0 7 days M T W T ES S 0 1 23 days M F S S 2 2 days M F 5 5 9 Programmable Periods Day 2 3 4 4 10 Remote Sensor Installed 0 0 1 Yes 11 Check Filter Interval 0 Disabled 350 3000 to 50 in 50 hour increments 12 Display Zone Temperature 0 No 1 1 Yes 13 Keypad Lockout Enabled 0 Disabled 1 1 Enabled 14 Initial Time Setting inTemporary 1 2 3 4 5 3 Override Mode hrs 15 Buzzer Options 0 Key Press only 1 1 Key Press amp Check filter 2 Key Press Check Filter and System Failures 16 Zone Temperature Calibration Displays current temp 0 offset with any offsets 17 Default Cooling Setpoint 45 to 98 F unoccupie
101. ariable Water Flow 85 VAV Box Option 79 VAV Changeover Contacts 78 VAV Drive Max Output 78 92 VCM 81 87 VCM Communication Failure 118 Velocity Pressure Sensor Failure 118 Ventilation Control Module 81 87 Ventilation Override Module 80 VFD 47 86 VFD Electrical Installation Procedure 47 VFD Mounting Requirements 47 VFD with Bypass 86 Voltage Imbalance 37 111 Voltage Range 37 VOM 80 VOM Communications Failure 118 W Wall Mounting the RHI Panel 59 Warnings and Cautions 2 Water Condenser Connection Sizes 84 Water Flow Fail 119 Water Flow Switch Option 84 Water Piping 34 Water Piping Options 84 Water Purge 84 89 SCXG SVX01B EN SCXG SVX01B EN e TRANE Water Temperature Requirements 35 Water Valves 109 Water Cooled Condensers 84 Water Cooled Unit Piping 63 Waterside Components 84 Waterside Economizer Flow Control 84 Waterside Economizer Installation Procedure 42 Waterside Economizer Option 84 Waterside Module 80 Waterside Piping Arrangements 35 Wiring 53 Wiring the Remote Air cooled CCRC and SCRG 50 Wiring the Remote Human Interface 61 Wiring the Timeclock 57 WSM 80 WSM Communications Fail 119 WSM Mixed Air Temp Sensor Fail 119 Z Zone Cool Setpoint Failure 119 Zone Sensor Installation 53 Zone Sensor Maximum Lengths and Wire Size 53 Zone Temperature Heating 94 Zone Temperature Control 93 123 TRANE Literature Order Number SCXG SVX01B EN
102. at can result in comfort problems increased airflow resistance and thus increased operating energy costs If the coil surface dirt becomes wet which commonly occurs with cooling coils microbial growth mold may result causing unpleasant odors and serious health related indoor air quality problems Inspect coils at least every six months or more frequently as dictated by operating experience Cleaning frequently is dependent upon system operating hours filter maintenance and efficiency and dirt load The suggested cleaning method is below Steam and Hot Water Coils 1 Disconnect all electrical power to the unit 2 Don the appropriate personal protective equipment PPE 3 Gain access to both sides of the coil section 4 Use a soft brush to remove loose debris from both sides of the coil 5 Use a steam cleaning machine starting from the top of the coil and working downward Clean the leaving air side of the coil first then the entering air side Use a block off to prevent steam from blowing through the coil and into a dry section of the unit 6 Repeat step 5 as necessary Confirm that the drain line is open following completion of the cleaning process 7 Allow the unit to dry thoroughly before putting the system back into service 8 Straighten any coil fins that may be damaged with a fin rake 9 Replace all panels and parts and restore electrical power to the unit 10 Ensure that contaminated material do
103. ate the unit will either maintain a constant level of cooling capacity with the supply air temperature within the control band or the highest active cooling level will cycle to provide an average supply air temperature equal to the setpoint If the supply air temperature swings outside the limits of the control band the mechanical cooling capacity will increase or decrease by one level accordingly The change occurs by integrating the tem perature offset from the control band limit A minimum time delay of five minutes follows each change in cooling level This time delay promotes stability by allowing the system to respond to the change before any further control action occurs As the supply air temperature ap proaches setpoint the time duration between changing levels of cooling capacity increases See Figure O SO 2 for the typical unit operating curve Figure O SO 3 shows typical unit performance when supply air temperature swings exceed the control band limits Adjust the supply air temperature control Table O SO 3 IntelliPak Unit Cooling Capacity Percent Cooling Stage Utilized Unit Tons Cool 1 SCWG 20 53 SCWG 25 53 SCWG 30 47 Cool 2 Cool 3 100 100 65 100 SCWG35 0B 10 Table O SO 4 Thermostat Controlled Unit Cooling Capacity Stages Unit Cooling Stages Size Cool 1 Cool 2 ity Utilized Capacity SCWG 20 53 100 SCWG 24 53 100 SCWG 30 65 100 SCWG35 0B SCRG 20
104. ates If the water is cool enough for economizing but mechanical cooling is also required the economizer valve fully opens to establish full water flow through the condensers Whenever the water is too warm for economizing and there is a call for cooling the economizer valve fully closes and the bypass valve fully opens establishing full water flow through the condensers Full water flow is always maintained through the condensers when mechanical cooling is required Both valves close whenever cooling is not required and in the event of a power failure See Figures O GI 4 and O GI 5 SCXG SVX01B EN e TRANE Owner Condenser 1 Condenser 1 Condenser 2 Condenser 2 v2 Figure O GI 3 Basic water piping configu Figure 4 Intermediate water piping ration constant water flow configuration variable water flow Condenser 1 Economizer vi Condenser 2 v2 Iu c Figure O GI 5 Intermediate piping configuration with waterside economizer variable or constant water flow 85 e TRANE Unit Airside Components The unit s air delivery system consists of condensers dampers enthalpy switch option airside economizer option filters low ambient sensors and factory mounted single or double wall plenums Supply Air Fan The unit has a single supply fan that runs at
105. ating Mode RTM sensors include zone sensors with T inti Resistance or without setpoint inputs and modes applied to RTM Mode CV Units VAV Units supply air sensor duct static pressure input terminals Ohms Fan Mode System Mode System Mode outside air temperature outside air 2320 Auto Off Off humidity airflow proving and dirty filter 4870 Auto Cool 7680 Atl Att Ati 10 7700 Oo Of 13 320 On Cool 16 130 On Auto 19 480 Auto Heat 27 930 Heat Note Mode boundaries are 1000 to 40 000 ohms Other boundaries are equal to the midpoint between the nominal mode resistance SCXG SVX01B EN 79 e TRANE Compressor Module SCM and Standard on All Units The compressor module single circuit and multiple circuit energizes the appropriate compressors and condenser fans upon receiving a request for mechanical cooling It monitors the compressor operation through feedback information it receives from various protection devices Human Interface Module Standard on all units The human interface HI module enables the operator to adjust the operating parameters for the unit using it s 16 key keypad on the human interface panel The HI panel provides a 2 line 40 character clear language English Spanish or French LCD screen with unit status information and menus to set or modify operating parameters It is mounted in the unit s main control panel and accessible through the unit s control panel door
106. before the automatic reset S SCM Communication Failure Problem The RTM has lost communication with the SCM Check Check field unit wiring between the RTM and SCM Reason for Diagnostic The RTM has lost communication with the SCM UCM s Reaction A Lockout request is sent to the compressor staging control function A failsafe function in the SCM will cause all SCM outputs to be zeroed and deenergized Reset Required PAR An automatic reset occurs after communication has been restored Space Static Press Setpt Failure Problem The active space static pressure setpoint is out of range Check Check setpoint value Also if space pressure setpoint source is GBAS but this setpoint has not been assigned to any of the 4 analog inputs on GBAS this message will occur Reason for Diagnostic The unit is reading a signal that is out of range for the space static pressure setpoint input 0 03 IWC or input 0 20 IWC UCM Reaction The default space pressure setpoint will become the active space pressure setpoint Reset Required PAR An automatic reset occurs after the designated space pressure setpoint source sends a signal within range for 10 continuous seconds or after a different space pressure setpoint source is user defined Supply Air Pressure Sensor Failure Problem The supply air pressure sensor voltage input is out of range Check Check field unit wiring between the sensor and RTM Reas
107. contained unit Remote Display End Connected the two insulated leads to the Remote Panel Connect the wire connected to the positive terminal at the remote panel Connect the wire connected to the negative terminal at the remote panel Connect the ground wire from the remote panel to the unit control panel casing Interprocessor Communication Bridge Module Wiring Refer to Figure I PR 33 and trim the outer covering of the shielded cable back approximately one inch Cut the bare shield wire off even with the outer covering Strip approximately 1 inch of insulation from each insulated wire in order to connect them to the terminal strip at the unit Wrap tape around any exposed foil shield and or base shield wire Note The communication link is polarity sensitive Refer to the unit wiring diagram and connect the white lead to the positive terminal and the black lead to the negative terminal These terminals are numbered Reference to color is for clarification to maintain polarity Note To maintain polarity do not connect the base shield wire to ground at the self contained unit Unit End Cut ground Shield Wire Outer Off at Unit End d Ingulation Foil Bhield to the ground screw provided in the Remote Digplay panel Cover any exposed Foil dniela and Shield Wire with electrical Connect the Shield Ground Wire tape oo HA Connect the two ingulated leads to t
108. crements e Depressing and holding either the T or arrow will cause the temperature setting to increment rapidly Simultaneously depressing the 7 or arrow for two seconds while in the program menu or temporary override menu will toggle the ZSM between an occupied and unoccupied condition Holdtemp Button While in normal run mode depressing the hold temp button toggles the ZSM to a temporary manual override menu See Figure 3 This mode overrides any number of programmed setpoints through any of the 28 programmed periods After entering setpoints and length of override time these settings are now used CO aa Desired HEAT COOL DAYS HOURS OVERRIDE I lt gt OCCUPIED an am Figure 4 Temporary Manual Override Menu Screen Keypad Operation for Temporary Manual Override Menu The keypad has the same function in temporary manual override menu as in all other menus with a few exceptions Depressing the day button will toggle your ZSM between the day and hour icon See Figure 3 on page 65 e Depressing the mode button will toggle your ZSM between the heat and cool icons and setpoints e Depressing the erase button will cancel the override and return the ZSM to normal run mode e Depressing the holdtemp or program buttons while in the temporary manual override menu will toggle your ZSM to the temporary override mode See Figure 4 67 e TRA
109. ction Reaction A Lockout Ckt 1 2 3 or 4 request is issued to the compressor staging control function Reset Required PMR A manual reset is required anytime after the diagnostic is set The diagnostic can be reset by the human interface Tracer Summit or by cycling power to the RTM M Manual Reset SA Static Press Limit Problem The supply air static pressure went too high for the third consecutive time Reason for Diagnostic The auto reset supply air static pressure limit diagnostic has occurred for the third time while the unit is operating in occupied mode Reaction A supply air pressure shutdown signal is sent to the following functions a Compressor staging control b Economizer actuator control c Heat operation d Supply fan control e IGV VFD control f Exhaust fan control g Exhaust actuator control Reset Required PMR A manual reset is required and can be accomplished at the HI Tracer Summit or by cycling power to the RTM MCM Communications Failure Problem The RTM has lost communication with the MCM Check Check field unit wiring between RTM and MCM Reason for Diagnostic The RTM has lost communications with the MCM Reaction A Lockout request is sent to the compressor staging control function And a failsafe function in the MCM will cause all MCM outputs to be zeroed and deenergized Reset Required PAR An automatic reset
110. ction nameplate matches that on the compressor nameplate 2 Remove the connector brackets holding the the sheet metal shipping cover on compressor section Retain brackets and screws 3 Remove shipping cover from the compressor section and verify the ship with packge contains e suction and discharge line couplings e insulation e sheet metal screws 4 Lift fan section onto the compressor section using the rigging method in Figure l PC 8 on page 13 5 Remove skid from the fan section placing the fan section onto the compressor section Reference Figure l PC 9 on page 15 6 Install the connection brackets with the sheet metal screws referenced in step 2 on all sides of the unit Reference Detail A in Figure l PC 9 7 Remove the unit panels labeled RU and RL in Figure 10 on page 15 To remove panels first remove the four shipping screws located in the corner of each panel Next turn the remaining 1 4 turn fasteners to the unlatch position The panel is supported by a lip channel So lift the panel up and off the unit to remove it See Detail A in Figure I PC 9 on page 15 8 Connect the drain hose to the drainpan outlet fitting and secure it with the drain hose clamp provided 9 Circulate nitrogen thoughout refrigerant circuits 10 Unbraze and remove the caps on the discharge and suction lines in both the compressor and fan sections 11 Install and braze discharge and suction line couplings
111. d SCXG SVX01B EN VO relay energized e Exhaust fan field installed on e Exhaust damper field installed open PURGE sequence D This sequence could be used for purging the air out of a building before coming out of unoccupied mode of operation on VAV units Also it can be used to purge smoke or stale air e Supply fan on e Supply fan VFD on 60 Hz if equipped e Inlet guide vanes VAV boxes Open if equipped e Outside air damper Open e Heat all stages Off Modulating heat output at 0 vdc e Occupied unoccupied output Energized e VO relay Energized Exhaust fan field installed On Exhaust damper field installed Open PURGE with duct pressure control E This sequence can be used when supply air control is required for smoke control e Supply fan on e Supply fan VFD on if equipped e Inlet guide vanes controlled by supply air pressure control function with supply air pressure high limit disabled e Outside air dampers open Heat all stages off hydronic heat output at 0 vdc e Occupied unoccupied output energized e VO relay energized e Exhaust fan field installed on Exhaust damper field installed open Note Each system cooling exhaust supply air etc within the unit can be redefined in the field for each of the five sequences if required Also the definitions of any or all of the five sequences may be locked into the so
112. d 74 18 Default Heating Setpoint 43 to 96 F unoccupied 68 F 19 Default Supply Air Cool 40 to 80 F occupied 55F 20 Default Supply Air Heat 60 to 160 F 100 F 21 Default Warmup 50 to 90 F occupied 68 22 Minimum Cooling Setpoint 45to 98 F 4 23 Maximum Heating Setpoint 43 to 96 F 96 F 24 Minimum Supply Air Cool 40 to 80 F occupied 40 F 25s Maximum Supply AirHeat GO to 1GOF GO 26s Maximum Warmup 50 to 90 F 90 F Table 3 UCM Signal Conditions Signal Condition Heat On FlashingHEAT is ON and indicated by a solid HEAT icon in the Display Failure in the cooling system indicated by a flashing COOL FAIL icon Cool On FlashingCOOLING is ON and indicated by a solid COOL icon in the Display Failure in the cooling system indicated by a flashing COOL FAIL icon On Off FlashingSystem is OFF and indicated by a solid colon on the time of On day display System is ON and indicated by a flashing colon on the time of day display System is in TEST mode and indicated by a flashing TEST icon Service Flashing ON System requires service and is indicated by a solid SERVICE icon There is a FAN failure indicated by a flashing SERVICE icon Note There is no indication for a signal in the OFF condition If Option 16 is set to 2 any flashing signals will also give audible buzzer indication SCXG SVX01B EN SCXG SVX01B EN Installation e TRANE 2 s MornDay EveNite Su Mo Tu W
113. d valves are located in the liquid refrigerant lines on the right hand side of the unit Refer to the unit wiring diagrams to make splice connections SCXG SVX01B EN ATTACH ANGLE AS EACH SIDE Installation e TRANE FROST PROTECTION SWITCH BASIC CONTROL UNIT SHOWN ON PANEL LIP DETAIL A Figure 9 How to assemble the split apart modular unit NOTES lt PANEL FMM IS ONLY USED ON UNITS WITH INTELLIPAK CONTROL UNITS W BASIC CONTROLS HAVE ONE PANEL THAT REPLACES FMM amp FMR FUL FUM FUR FML FMM FMR EN o FL FLR FRONT VIEW SCXG SVX01B EN RU SOLENOID VALVE SOLENOID VALVE RL ei RIGHT SIDE Figure I PC 10 Modular unit panel description and internal connections COUPLING 4 PLACES __ DRAIN HOSE A HA FAN MOTOR POWER WIRES REFRIGERANT CIRCUIT 2 REFRIGERANT CIRCUIT 1 SSEMBLED UNIT CONTROL PANEL RNESSES AIR COOLED UNITS ONLY e TRANE Skid Removal The unit ships on skids to provide forklift locations from the front or rear The skid allows easy maneuverability of the
114. e compressor and an motor terminals with the unit running Voltage must be within the range listed on the motor nameplate Phase imbalance must be less than 2 0 percent 2 Check all wiring and connections to be sure that they are intact secure and properly routed The as wired system diagrams are provided in the unit control panel 3 Check that all fuses are installed and properly sized 4 Inspect air filters and coils to bel sure that airflow to the unit is not restricted 5 Check the zone thermostat settings 6 Ensure that the fan is rotating in the proper direction If phasing is wrong at the main power terminal block the fan and compressors will not run 7 Inspect ductwork and duct connections for tightness 8 Inspect air temperature Extremely warm return air will decrease the cooling capacity of the air conditioner Some common unit problems and solutions are in Table D T 1 A complete list of operating diagnostics begin on page 112 Reference the ntelliPak Programming Guide PKG SVP01B EN SCXG SVX01B EN Diagnostic Troubleshooting e TRANE for additional operational info on the UCM system Operating Procedures Install pressure gauges on the discharge and suction line access valves When the unit has stabilized after operating approximately 15 minutes at full load record suction and discharge pressures System malfunctions such as low airflow line restrictions incorrect refrigerant charge
115. e Th Fr Sa 4 T el 6 cr CIC DAYSAMPM HOURS OVERRIDE MODE OFF HEAT COOL AUTO EMER TIME re estu 8 o rest Check Filter Desired S 18 en 10 11 12 ROOM TEMP 16 OPTION 15 13 14 Figure 9 BAYSENS019 complete icon display Icon Descriptions BAYSENS019 Icon Descriptions Refer to Figure I P 9 for a pictorial view of the written descriptions below 1 The four periods of the day used only during programming mode 2 The seven days of the week used during programming and in normal mode to display the day not current in Program Menu 3 Four digits used to display the time of day in normal run mode Also used in Programming Menu and Temporary manual Override Menu and options menu 4 Time of day colon used on the time of day clock The colon blinks to indicate the UCM system is functional 5 AM and PM are used to indicate the time of day when using a 12 hour clock AM and PM are not used when a 24 hour clock is selected 6 DAYS and HOURS are used to set the override timer period 7 Displayed in temporary manual OVERRIDE mode and when setting the override timer 8 Only used when setting the override timer 9 Displays the desired state of either OCCUPIED or UNOCCUPIED 10 The padlock symbol indicates that the keyboard lockout is in effect 11 This extends the mode selec
116. e air temperature and relative humidity sensor are provided for field installation to monitor reference enthalpy Economizer operation enables when the outside air enthalpy is less than 25 BTU s Ib adjustable 19 28 BTU s Ib During occupied mode the outside air damper opens to 15 adjustable 0 100956 for ventilation purposes Also the ability to alter the outside air damper position to compensate for VAV supply air modulation is inherent in the unit controls and can be enabled by the operator An analog 2 10 VDC output adjustable 0 10 VDC is provided to modulate the field provided 30 second damper actuators adjustable 1 255 seconds Airside Economizer Interface with Comparative Enthalpy Units with airside economizer interface and comparative enthalpy are equipped with the necessary control sequences to allow using outside air for the first stage of cooling in occupied or unoccupied mode and when ambient conditions are favorable for economizing Inherent in the unit controller is the ability to suppress the setpoint below the normal unit setpoint This allows the building to improve comfort levels when possible and at the same time optimize building mechanical cooling operation for peak operating efficiency A factory installed 88 Owner Air Cooled Condensers SXRG units are designed for use with the remote air cooled condenser model CXRC For more information see the air cooled condenser Installation Ow
117. e and pipe cover on the coil box Connect the wires that are coiled in the coil box referring to the wiring diagram installed on the unit control panel door Route wires into the unit through knockouts in the top of the box 7 Reinstall the filter rack on the back of the heating coil rack If the unit has the waterside economizer option the filter rack will require additional support legs 45 e TRANE Electric Heat Installation The electric heat option consists of a single stage heater and is used in IntelliPak units or units with a field installed thermostat The electric heater ships separate for field installation and wiring Available heater kW per unit size is listed Table I PR 3 Electric heat can be installed on units with either a vertical or horizontal discharge However it cannot be installed on units with plenums See Figure I PR 10 Tables I PR 4 and I PR 5 for electric heat dimensional data Table I PR 3 Available Electric Heat kW Unit Size Heater kW 20Tons 16 25Tons 20 30Tons 24 32Tons 26 35Tons 28 Installation Procedure 1 Remove the fan discharge shipping covers if they have not already been removed 2 Install the open cell gasket around the discharge opening on the heater 3 Position the electric heater so that the unit fan discharge openings line up with the electric heater openings For a vertical discharge unit position the electric heater as shown in Figure I PR
118. e assembly and perform maintenance procedures in the IGV maintenance section on page 106 Note Perform this procedure monthly if the unit is in a coastal or corrosive environ ment Annual Maintenance Check and tighten all set screws bolts locking collars and sheaves 1 Inspect clean and tighten all electrical connections 2 Visually inspect the entire unit casing for chips or corrosion Remove rust or corrosion and repaint surfaces 3 Visually check for leaks in refrigerant piping 4 Inspect fan motor and control contacts Replace badly worn or eroded contacts 5 Inspect the thermal expansion valve sensing bulbs for cleanliness good contact with the suction line and adequate insulation from ambient air 6 Verify the superheat setting is between 12 and 17 F at the compressor When checking operating pressures and conditions establish the following nominal conditions for consistent mea surements 1 Leaving air temperature greater than 60 F 2 Entering air temperature between 80 and 90 F 3 Entering water temperature greater than 65 F 4 Inlet vanes at least halfway open 5 Compressors running at full load 6 Drain the condensing water system and inspect it thoroughly for fouling Clean the condensers if necessary SCXG SVX01B EN System Checks Before proceeding with technical trouble charts or controls checkout complete the follow system analysis 1 Measure actual supply voltage at th
119. e is equal to the inner tube diameter 4 Wrap each refrigerant line component with a wet cloth to keep it cool during brazing Excessive heat can damage the internal components 5 If using flux apply it sparingly to the joint Excess flux will contaminate the refrigerant system 6 Apply heat evenly over the length and circumference of the joint 7 Begin brazing when the joint is hot enough to melt the brazing rod The hot copper tubing not the flame should melt the rod 8 Continue to apply heat evenly around the joint circumference until the brazing material is drawn into the joint by capillary action making a mechanically sound and gas tight connection 9 Visually inspect the connection after brazing to locate any pinholes or crevices in the joint Use a mirror if joint locations are difficult to see SCXG SVX01B EN SCXG SVX01B EN Installation e TRANE Unit Wiring Diagrams Specific unit wiring diagrams are provided on the inside of the control panel door Use these diagrams for connections or trouble analysis Supply Power Wiring It is the installer s responsibility to provide power supply wiring to the unit terminal block or the non fused disconnect switch option Wiring should conform to NEC and all applicable code requirements Bring supply wiring through the knockout in the lower left side of the unit control panel Connect the three phase wires to the power terminal block or the non
120. e of more than 2 096 exists check the voltage at the unit disconnect switch If the imbalance at the unit disconnect switch does not exceed 2 096 faulty unit wiring is causing the imbalance Conduct a thorough inspection of the unit electrical wiring connections to locate the fault and make any repairs necessary Access the connection terminal block through the control panel on the unit s upper left side All wiring should conform to NEC and applicable local code requirements Be sure all wiring connections are secure Reference the unit specific diagrams inside the control panel A CAUTION Unit transformers are sized to provide power to the unit only Do not use these transformers to supply power to field equipment Field connections to these transformers may create immediate or premature component failures 37 e TRANE Selection Procedures RLA Rated Load Amps Compressor LRA Locked Rotor Amps Fan Motor LRA Locked Rotor Amps N E C Table 430 150 FLA Full Load Amps N E C Table 430 150 Voltage utilization range is 10 percent Determination of minimum circuit ampacity MCA MCA 1 25 x largest motor amps VFD amps FLA or RLA the sum of the remaining motor amps Determination of maximum fuse size MFS and maximum circuit breaker size MCB MFS and MCB 2 25 x largest motor amps FLA or RLA the sum of the remaining motor amps If the rating value determined does not equal a s
121. ear and all keypad functions will be available again SCXG SVX01B EN Installation e TRANE e Keypad lockout applies only to normal run mode and temporary manual override mode Day Button normal run mode depressing the day button will move the current day ahead While in the program menu depressing the day button will move you through the seven days of the week and allow you to program temperature settings for each of the four daily periods Erase Button Pressing the erase button while in normal run mode will turn off the check filter icon Pressing the erase button while in the program menu will erase all time and temperature setpoints of a given period The erase button will acknowledge the failure buzzer Option 16 until 12 00 am Mode Button BAYSENS019 only Pressing the mode button toggles through all modes off heat cool auto and emer HP unit e BAYSENS020 only Pressing the mode button while in normal run mode or temporary manual override run mode will toggle through both modes off and auto Fan Button The fan button allows you to toggle between on and auto Up and Down Button Arrows e Depressing T or 4 arrow while in normal run mode will cause your ZSM to toggle to the temporary manual override menu Depressing either T or arrow while in the program menu or temporary override menu will cause the temperature setpoint to advance or decrease in one degree in
122. ecommended tension Refer to Adjusting BeltTension section on page 100 7 Retighten bearing set screws to the proper torques after aligning the sheaves 8 Check the fan bearing locking collars for tightness on the shaft To tighten the locking collar loosen the set screw and slide the collar into its proper position over the extended end of the inner case Tighten the set screw to the appropriate torque value 9 During air balancing verify the sheave alignment belt tension and that the shaft is parallel SCXG SVX01B EN For uneaven width sheaves use a taut string down the 4 F j center of both sides Straightedge should touch sheave at top and bottom Fixed Sheave Fixed Sheave Straightedge Straightedge Straightedge should touch sheave at top and bottom Fixed Sheave Figure O M 1 Fan shaft and motor sheave alignment 99 e TRANE Fan Bearings The opposite drive end bearing is a special bearing with close tolerance fit of balls and races Replace this bearing with the same part number as the original bearing Fan Belt Tension Note Check fan belt tension at least twice during the first days of new belt operation since there is a rapid decrease in tension until belts are run in Proper belt tension is necessary to endure maximum bearing and drive component life and is based on fan brake horsepower requirements If frayed or worn replace belts in matched sets Measuring Belt Tension
123. ecuring it to the skid from the side flanges Retain these screws for later use Unit Preparation 3 The support legs are secured to the skid and the hanging bracket is secured with wire ties to an inside flange near the cabinet s base Remove the C channel collar and install it on the unit if not already installed 4 Remove the roll of thick gasket from the damper cabinets W supports and apply it to the C channel collar mounted on the rear of the unit This gasket will provide a seal between the damper cabinet and the unit 5 Attach the legs with screws provided to the leg brackets located on the damper s base 6 Attach a field provided clevis of suitable strength gt 1 2 to each of the corner lifting brackets through the 7 diameter holes 7 Attach to the clevises a means of lifting the damper cabinet from its skid Unit Installation 8 Slowly raise the damper cabinet from its skid 9 Attach the hanging bracket across the front of the damper cabinet Position it with its short flange pointing to four o clock and secure it with screws provided See Figure I PR 13 10 Lift the damper cabinet and position it such that the hanging bracket is positioned over the unit s C channel collar Installation SPREADER Figure 12 Proper lifting of the airside economizer 10 Lower the damper cabinet until the holes in its side flanges are aligned with the holes in the C channel colla
124. ed upstream of the hydronic coil Units with Electric Heat LIVerify the supply air temperature sensor is installed downstream of the electric heat coil 63 e TRANE Programmable Zone Sensor Option BAYSENS019 INDICATES TIME OF DAY BY HOUR AND MINUTE INDICATES Installation SuMoTuWeThFrSa 88 98 AM MORNING OR AFTERNOON INDICATES OCCUPIED AND UNOCCUPIED PERIOD INDICATES KEYPAD LOCKOUT STATUS INDICATES OPERATING MODE IN EFFECT OFF HEAT COOL AUTO EMER 5 5019 Keypad and Display Explanation 1 Up and Down Buttons e Increases or decreased programmed temperature settings in program menu Shifts to temporary manual override in normal run mode Increases or decreases temperature while in temporary override menu 2 Time Adjust Button Used to set the correct time of day Used to set programmed time for temperature variations 3 Program Button Toggles between the display control screen and the display program screen 64 OCCUPIED INDICATES INDICATES FAN STATUS ROOM TEMPERATURE AUTO HOLD TE MP quum MODE FAN aue Figure 1 BAYSENS019 Keypad and display configuration 4 Erase Button Erases time and temperature settings throughout each of the programmed periods Exits temporary manual override 5 Day Button Toggles through the seven days of the week 6 Hold Tem
125. elt operation Belt tension will rapidly de crease until the belts are run in 110 Owner 5 Check the liquid line sight glasses during operation Bubbles in the sight glasses indicate a possible shortage of refrigerant or an obstruction in the liquid lines such as dirty liquid line filter driers 6 Inspect filter driers for leaks flow obstructions or temperature drop across the filter drier A noticeable temperature differential such as 5 F in the liquid line may indicate an obstruction Replace the filter drier if it appears clogged 7 Inspect the optional waterside economizer coil Clean the coil to prevent airflow restrictions through the fins 8 Check and record operating pressures Semi Annual Maintenance 1 Verify the fan motor is properly lubricated Follow lubrication recommendations on the motor tag or nameplate Contact the motor manufacturer for more information 2 Lubricate fan bearings For best results lubricate bearings during unit operation Refer to the Fan Bearings section on page 100 3 With power disconnected manually rotate the fan wheel to check for obstructions in the housing or interference with fan blades or inlet guide vane option Remove obstructions and debris Center the fan wheel if necessary 4 Check the fan assembly sheave alignment Tighten set screws to their proper torques 5 Check water valves for leakage at valve stem packing nut 6 Inspect the inlet van
126. emp Sensor Failure Problem On units with the comparative enthalpy option the return air temperature sensor input is out of range Check Sensor resistance should be between 830 ohms 200 F and 345 7Kohms 40 F If so check field unit wiring between the sensor and ECEM Reason for Diagnostic The unit is reading a signal that is out of range for the return air humidity sensor temp 55 F or temp gt 209 F UCM s Reaction The economizer enable r e enthalpy function reverts to reference enthalpy changeover Level 2 control Reset Required PAR An automatic reset occurs after the RA temp input returns to 115 e TRANE its allowable range continuously for 10 seconds RTM Aux Temp Sensor Failure Problem The RTM auxillary temperature sensor data is out of range Check Sensor resistance should be between 830 ohms 200 F and 345 7 Kohms 40 F If so check field unit wiring between sensor and RTM Reason for Diagnostic At least one enabled unit function has the RTM auxillary temperature input designated as its sensor and the unit is reading a signal that is out of range for this input temp lt 55 F or temp gt 209 F 5 Reaction The functions with the RTM auxillliary temperataure input deignated as their sensor are disabled Reset Required PAR an automatic reset occurs after the designated zone temperature signal returns to its allowable range To prevent rapid cycling of the di
127. en and the display program screen 4 Erase Button e Erases time and temperature settings throughout each of the programmed periods e Exits temporary manual override 5 Day Button Toggles through the seven days of the week 6 Hold Temp Button Shifts controller to temporary manual override and begins temperature override 7 Mode Button eToggles the controller between the two modes off and auto e Advances to next setpoint in program menu 8 During Programming Indicates e Heat supply air e Cool supply air e Warmup temperature 65 e TRANE Initial Power Up Before applying power to your ZSM and before performing setup and operation procedures verify that all wiring is correct See Figures I P 9 on page 71 and 10 on page 72 for a complete zone sensor icon display description For BAYSENS020 only at initial power up the ZSM controls to default tempera tures of 68 F 19 C for warmup and 55 F 13 C supply air until the ZSM is pro grammed or the arrow keys are pressed If the arrow keys and mode are moved the ZSM starts controlling to these new settings Time and Day Settings On power up your ZSM will be in normal run mode and will begin operating using setpoints The display will show the wrong day and time and will need to be set To set the time there is a single rubber button on the keypad minus and olus mark time Depressing the positive side will advance the time
128. equired PAR An automatic reset occurs after the SA temp cooling setpoint input returns to within range for 10 continuous seconds or after a different SA temp cooling setopint selection source is user defined Supply Air Temp Heat Setpoint Fail Problem The active supply air temperature cooling setpoint is out of range Reason for Diagnostic The input designated as the SA temp heating setpoint is out is out of range Temp lt 35 F or Temp gt 185 Reaction The default SA temp heating setpoint becomes the active SA temp heating setpoint Reset Required PAR An automatic reset occurs after the SA temp heating setpoint input returns to within range for 10 continuous seconds or after a different SA temp heating setopint selection source is user defined Supply Air Temperature Failure Problem The supply air temperature sensor input is out of range Check Sensor resistance should be between 830 ohms 200 F and 345 7 Kohms 40 F If so check field unit wiring between sensor and RTM SCXG SVX01B EN Diagnostic Troubleshooting e TRANE Reason for Diagnostic The unit is reading a signal that is out of range for the supply air temperature input on the RTM temp lt 55 F or temp gt 209 F UCM s Reaction These unit functions are disabled e supply air tempering e economizing supply air temperature low limit function CV units supply air temperature control heating
129. er flow with or without a waterside economizer A two way modulating control valve is wired and installed in the unit to maintains a specific range of water temperature rise through the condenser when entering fluid 84 Owner temperature is less than 58 F 15 C This option allows the compressor to operate with entering fluid temperature down to 35 F 2 C The minimum valve position to maintain minimum condenser flow rates is user defined at the Hl This valve drives closed if the unit shuts down or if a power failure occurs Water Flow Switch Option A water flow switch is factory installed in the condenser water pipe within the unit Whenever the flow switch detects a water flow loss prior to or during mechanical cooling compressor operation locks out and a diagnostic code displays If water flow is restored the compressor operation automatically restores To prevent injury or death due to instantaneous release of high pressure water provide relief valves on system water piping This will also help prevent water pump damage or stoppage due to excessive system pressure Water Cooled Condensers Units that are set up for variable water flow will modulate a water valve to maintain a user defined condensing temperature setpoint Condensing temperature will be referenced utilizing factory installed sensors located at each condenser Table O GI 8 Water Condenser Connection Sizes Unit Size Direct Factory
130. erve refrigerants for continued use SCXG SVX01B EN SCXG SVX01B EN e TRANE Cross reference to related publications information IntelliPak Self Contained Programming Guide PKG SVPO1B EN Remote Air Cool Condenser Installation Owner and Diagnostic Manual CXRC SVX01A EN Installation General Information Pre installation Considerations Dimensions Weights Mechanical Requirements Electrical Requirements Pre Startup Requirements Programming Startup Owner General Information Sequence of Operation Maintenance Diagnostic Troubleshooting Troubleshooting Diagnostics 17 33 ou 39 64 74 d 3 98 111 111 112 e TRANE Modular Series Self Contained Unit Components Commercial self contained units are complete HVAC systems used in floor by floor applications Units are easy to install because they feature a single point power connection factory installed and tested controls single water point connection factory installed options and an internally trapped drain connection Modular self contained units can ship as split apart units for installation ease Split apart units ship with a dry nitrogen charge and require field refrigerant charging Units consist of multiple compressors water cooled condensers water cooled units only an evaporator coil dual forward curved fans and control panel Air cooled units require a remote air cooled condenser model CXRC The hermetica
131. es not contact other areas of the unit or building Properly dispose of all contaminated materials and cleaning solutions Refrigerant Coils 1 Disconnect all electrical power to the unit 2 Don the appropriate personal protective equipment PPE 3 Gain access to the coil section of the unit both sides 4 Use a soft brush to remove loose debris from both sides of the coil 5 Mix a high quality coil cleaning detergent with water according to the manufacturer s instructions If the detergent is strongly alkaline after mixing pH 8 5 or higher it must contain an inhibitor Carefully follow the cleaning solution manufacturer s instructions regarding product use 6 Place the mixed solution in a garden pump up sprayer or high pressure sprayer If using a high pressure sprayer note the following e Maintain a minimum nozzle spray angle of 15 degrees e Spray perpendicular to the coil face e Protect other areas of the unit and internal controls from contact with moisture or the cleaning solution Keep the nozzle at least 6 inches from the coil Do not exceed 600 psig Draining the Coil 4 CAUTION Failure to properly drain and vent coils when not in use during freezing temperatures may result in coil freeze up damage Drain plugs are in the piping below each coil s supply and return header Use these plugs to drain the coil and piping When draining the coil open the vents at the top of the supply and r
132. esignated as the unoccupied zone cooling setpoint source is out of range Temp lt 45 F orTemp gt 94 F Reaction The active unoccupied zone cooling setpoint reverts to the default value Reset Required PAR An automatic reset occurs after the designated unoccupied zone cool setpoint input returns to its allowable range for 10 continuous seconds or after the user defines a different valid unoccupied zone cool setpoint selection source Unoccupied Zone Heat Setpoint Failure Problem The unoccupied zone heating setpoint input is out of range Reason for Diagnostic The input designated as unoccupied zone heating setpoint source is out of range temp lt 45 F or temp gt 94 F 5 Reaction The active unoccupied zone heating setpoint reverts to the default value Reset Required PAR An automatic reset occurs after the designated unoccupied zone heat setpoint input returns to its allowable range for 10 continuous seconds or after the user defines a different valid unoccupied zone heating setpoint selection source V VCM Communication Failure Problem The RTM has lost communication with the VCM Verify Check field unit wiring between RTM and VCM Reason for Diagnostic The RTM has lost communication with the VCM UCM s Reaction All active commands and setpoints provided by the VCM are canceled and or ignored A fail safe function in the VCM will cause all outputs to deenergize and or set to
133. essors Units use two sizes of hermetic scroll compressors 10 and 15 hp and can use from two to four compressors When viewing the front of the unit compressors are identified A through B from left to right The second compressor from the left or compressor is always the first to come on unless locked out for a malfunction or shut off on frost protection Refer to Table O SO 1 for compressor cycling stages andTable O SO 3 on page 96 for percent cooling capacity by stage The control system logic permits com pressor operation only after the supply fan is on If the supply fan shuts down compressors will not operate Units without head pressure control units with intermediate piping packages will lock out mechanical cooling when the entering condenser water temperature falls below 54 Mechanical cooling will resume when the entering condenser water temperature exceeds 58 F Table O SO 1 Compressor Stages Owner e TRANE Compressor Cycling Compressors cycle to maintain the operating state required by the temperature controls In the event of a compressor failure the next available compressor turns on Refer to Table O SO 1 for compressor cycling by unit model and tons During normal conditions compressors will not shut off until they have been on for at least three minutes and will not turn on until they have been off for at least three minutes Normal operating condi tions are established on an individua
134. eturn headers 107 e TRANE 108 Owner Also a drain plug is at the bottom of the inlet condenser manifold and in the outlet pipe near the unit s left side Remove these plugs to drain the condensers Be sure to open the vent plugs at the top of the condenser inlet and outlet manifold See Figure O M 7 on page 105 When refilling the condenser waterside economizer coil system with water provide adequate water treatment to prevent the formation of scale or corrosion A CAUTION Failure to provide adequate water treatment in condenser systems may result in coil and condenser fouling or undue metal damage Cleaning the Condenser Note Using improperly treated or un treated water in this equipment may result in scaling erosion corrosion algae or slime Engage the services of a qualified water treatment specialist to determine what treatment is advisable The Trane Company warranty specifically excludes liability for corrosion erosion or deteriora tion of Trane equipment Trane assumes no responsibilities for the results of the use of untreated or improperly treated water saline or brackish water Condensing water contains minerals that collect on the condenser tube walls Cooling towers also collect dust and foreign materials that deposit in the condenser tube The formation of scale or sludge in the condenser is indicated by a decreased water flow low temperature difference between inlet and outlet wa
135. ex head screws from the top and bottom of the filter rack assembly The filter rack assembly will hang on the unit when the screws are removed The filter rack can now be removed by lifting up on the filter rack 2 Remove the hydronic coil from the crate and position it behind the unit with the open side facing the unit evaporator coil inlet Also remove the plastic envelope that is taped to the coil box assembly This envelope contains the mounting screws needed to attach the coil box to the unit and the gasket required on the vertical side flanges of the box 3 Install the pressure sensitive gasket to the unit side of the vertical flange on the coil box in two places 4 Using 2 standard thread eyebolts thread into the coil lift plates to raise the coil up to the height necessary to attach it to the unit The top panel has a J hook on it to allow hanging similar to the filter rack Align the holes so that the coil hangs on the unit If the unit has the dirty filter option connect the static pressure tube to the unit before bolting the coil in place Locate the static pressure tubing on the unit evaporator coil and route through the knockout in the top corner of the coil box 5 Align the hydronic coil with the holes in the unit channel or waterside economizer option Move the coil box up against the unit and install using six mounting screws in the top and six in the bottom of the coil box 6 Remove the valv
136. f it is correct switch wires on the fan contact so the fan is properly phased 2 Check the fan belt condition and tension Adjust the tension if belts are floppy or squeal continually Replace worn or fraying belts in matched sets 3 Check voltage at all compressor terminals Actual voltage should be within 10 percent of nameplate voltage 4 Check voltage imbalance from these three voltage readings at each compressor Maximum allowable voltage imbalance phase to phase is 2 5 Check amp draw at compressor terminals RLA and LRA is on the unit nameplate 6 Measure amp draw at evaporator fan motor terminals FLA data is on the motor nameplate 7 After the system has stabilized 15 to 30 minutes check and record operating pressures and temperatures for all circuits When checking the operating pressures and conditions establish nominal conditions for consistent measurements as follows e Leaving air greater than 60 F e Entering air temperature between 70 and 90 F e Entering water temperature greater than 60 F e Inlet guide vanes at least halfway open With all compressors running at full load 1 Compute superheat from the suction line pressure and temperature at the compressor on each circuit Adjust the thermal expansion valve settings if necessary Superheat should be between 12 and 17 F 2 Inspect refrigerant flow in the liquid line sight glass Flow should be smooth and even with no bubbles once the
137. f the LEATPD is on a water cooled unit without factory installed heat it is wired to the WSM It will trip if the entering water temperature falls to 34 F open the economizer valve and energize the pump output High Duct Temp Thermostat Option On Units with a The high duct temperature thermostats are binary input devices used on units with aTrane communication interface module TCI The high duct temperature thermostat provides a high limit unit shutdown and requires a manual reset The thermostats are factory set to open if the supply air temperature reaches 240 F or the return air temperature reaches 135 F Once tripped the thermostat requires a manual reset Reset by pressing the sensor s reset button when the air temperature decreases approximately 25 F below the cutout point Filter Switch The filter switch is a binary input device used on units to measure the pressure differential across the unit filters It is mounted in the filter section and connected to the RTM A diagnostic SERVICE signal displays at the remote panel if the pressure differential across the filters is at least 0 5 w c The contacts automatically open when the pressure differential across the filters decrease to 0 4 w c The switch differential is field adjustable between 0 17 to 5 0 w c 0 05 High Duct Static Switch Option The high duct static switch is field mounted in the ductwork or plenums with smoke dampers It wil
138. ftware by simple key strokes at the human interface panel Once locked into the software the sequences cannot be changed Trane Communications I Interface Module TCI Option used with Trane ICS The Trane communication interface module allows external setpoints for most of the unit functions to be communicated to the unit s UCM network via aTrane ICS systems DIP switch settings on the TCI module for this SCXG SVX01B EN Ventilation Control Module ube From Solenoid to igh Side of Transducer e TRANE General Owner Information application are switch 1 off 2 on and Ventilation Control Module 3 off Available only with Traq Damper Option Exhaust Comparative The ventilation control module VCM is located in the airside economizer section of the unit and linked to the units UCM network Using a velocity pressure transducer solenoid pressure sensing ring in the fresh air section allows the VCM to monitor and control fresh air entering the unit to a minimum airflow setpoint See Figure O GI 2 for a detail view of the velocity pressure transducer solenoid assembly Enthalpy Module ECEM On Units with Comparative Enthalpy Option The exhaust comparative enthalpy module receives information from the return air humidity sensor and the RTM outside air temperature sensor and outside air humidity sensor the outside air humidity sensor and temperature sensor to util
139. g Switches 90 Supply and Exhaust Fan Circuit Break ers 90 Supply Duct Static Pressure Control 79 Supply Fan 99 Supply Fan Circuit Breaker Fuses and Overloads 90 Supply Fan Failure 117 Supply Fan Isolators 39 Supply Fan VFD Bypass Enabled 117 Supply Power Wiring 37 System Checks 111 T TCI 81 TCI Module Comm Failure 117 Temporary Manual Override 67 Temporary Manual Override Run Mode 68 Temporary Override Run Mode 68 Time and Day Settings 66 Time Button 67 Time Clock 91 Time Clock Option 57 Timeclock Installation 57 Timeclock Installation Checklist 57 Timed Override Activation 92 Tracer Communications Failure 117 Tracer Summit System 91 Trane Communications Interface Module 81 Transducer Location 49 U Unit Airside Components 86 Unit Components 4 Unit Control Components 78 Unit Control Module 5 Unit HI Communications Failure 118 Unit Isolator Installation Procedure 40 Unit Location 63 Unit Mounting 63 Unit Nameplate 5 UNIT OFF sequence A 80 Unit Protective Covers 39 Unit Shipping 14 Unit Start Up Procedures 74 Unit Startup 74 Unit Vibration Isolator Option 40 Unit Wiring Diagrams 37 Units With Economizer 93 Unoccupied 91 Unoccupied Zone Cool Setpoint Failure 118 Unoccupied Zone Heat Setpoint Failure 118 Up and Down Button Arrows 67 Using Intelligent Copy 70 V Variable Air Volume Zone Sensor 55 Variable Frequency Drive 86 Variable Frequency Drive Option 47 V
140. he appropriate terminals in the unit control panel Figure I PR 33 Dressing shielded twisted wire 61 e TRANE 62 Installation Connecting to Tracer Summit IntelliPak self contained units operate with Trane building automation software Tracer Summit version 10 0 4 or later or any OS2 operating system CAUTION Tape the non insulated end of the shield on shielded wire at the unit Any connection between the shield and ground will cause a malfunction If daisy chained in the unit splice and tape the shields to prevent contact with ground Communication Wiring Note Communication link wiring is a shielded twisted pair of wire and must comply with applicable electrical codes An optional communication link provides serial communication interface SCI between Tracer Summit and each commercial self contained CSC unit in the system The CSC system can have a maximum of 12 CSC units per connection link to Summit Use a single 18 AWG shielded twisted pair wire with stranded thinned copper conductors to establish each communication link between Summit and each unit SCXG SVX01B EN SCXG SVX01B EN Installation e TRANE Pre Startup Checklist Complete this checklist after installing the unit to verify all recommended installation procedures are complete before unit start up This does not replace the detailed instructions in the appropriate sections of this manual Always read the
141. hin 4to 131 2 Locate the time clock at least 5 feet away from any large electrical contact or machinery to avoid possible electrical interference problems 3 Provide a separate independent circuit for the time clock power supply 4 Since all electronic instruments are sensitive to voltage spikes pay close attention to the following a If possible supply power to the electronic time clock from a phase different than the one supplying power to the load b Provide a suitable Varistor or RC network across the INDUCTIVE LOADS supply terminals to reduce voltage spikes c Place a diode across the DC OPERATED INDUCTOR terminals to eliminate back EME d HIGHLY INDUCTIVE LOADS especially fluorescent lights may require a relay in which case A and C apply The Digi 20A timeclock unit can be surface or flush mounted Lift off the front cover and loosen the two screws on opposite corners Pull off the base s plug with a left to right rolling motion Surface Mounting Inside Panel Place screws through the bases preset holes and screw to back of panel or wall Wire according to the instructions in the following section Depending upon the specific installation you may find it more convenient to complete wiring before attaching the base Place the terminal cover over the terminal block by aligning the two screws with the corner holes in the base Push the timer firmly onto the plug in the base Tighten the two screws
142. hould approve or provide all materials used in the external circulating system along with the quantity of cleaning material duration of cleaning time and safety precautions necessary for handling the cleaning agent SCXG SVX01B EN SCXG SVX01B EN Owner e TRANE Piping Components Water Valves Water valves have a stern packing nut If there is evidence of water leakage at the valve stem proceed as follows 1 Remove actuator motor from support plate Remove four mount bolts 2 Remove shaft coupling 3 Torque the packing nut to 10 ft Ibs of torque 4 Replace shaft coupling 5 Replace actuator motor reinstall the four mount bolts Note If it is necessary to remove the four valve body bolts for valve cleaning or service torque to 45 ft lb Flow Switch Maintenance Flow switches have a magnet on the vane assembly that attracts ferrous particulate may build up on the magnet to the point that the vane will wedge so that it will not operate When the flow switch does not operate remove and replace it or disassemble and clean it Cleaning the Flow Switch If ferrous particulate contaminates tower water the ferrous particles will cling to the magnet on the switch paddle assembly A buildup of the ferrous particles over a period os time will cause the paddle to stick and cease to function properly To avoid this problem remove the switch and clean each time you clean the condensers or clean a
143. hs or as dictated by operating experience If evidence of standing water or condensate overflow exists take steps to identify and remedy the cause immediately Refer to the trouble shooting section of this manual for possible causes and solutions If microbial growth is evident in the drain pan remove and clean it immediately Clean drain pans using the following procedure 1 Disconnect all electrical power to the unit 2 Don the appropriate personal protective equipment PPE 3 Remove all standing water 4 Use a scraper or other tools to remove and solid matter Remove solid matter with a vacuum device that utilizes high 98 Owner efficiency particulate arrestance HEPA filters with a minimum efficiency of 99 97 at 0 3 micron particle size 5 Thoroughly clean the contaminated area s with a mild bleach and water solution or an EPA approved sanitizer specifically designed for HVAC use Carefully follow the sanitizer manufacturer s instructions regarding product use 6 Immediately rinse the drain pan thoroughly with fresh water to prevent potential corrosion from the cleaning solution 7 Allow the unit to dry thoroughly before putting the system back into service 8 Determine and correct the cause of any microbial contamination 9 Be careful that the contaminated material does not contact other areas of the unit or building Properly dispose of all contaminated materials and cleaning solution Note
144. iate terminals at the unit control panel and atthe zone sensor subbase In general zone sensor connections to the unit use the convention of connecting zone sensor terminals to like numbered unit terminals 1 to 1 2 to 2 etc The connection detail is shown on the unit wiring diagrams which are located in the unit control panel 3 Replace the zone sensor cover back on the subbase and snap securely into place Standard Remote Sensor BAYSENSO 17 When using the remote sensor BAYSENS017 mount it in the space that is to be controlled Wire according to the interconnecting wiring diagrams on the unit Table I PR Z Zone Sensor Maximum Lengths and Wire Size Distance from Recommended Unit to Controller Wiring Size 0 150 feet 22gauge 151 240 feet 20gauge 241 385 feet 18gauge 386 610 feet 16gauge 611 970 feet 14gauge 53 TRANE Installation 54 1 000 2 750 NNI i ff o N 1 i 3 300 n DI 45208 2 100 342 500 Figure I PR 22 Zone sensor mounting hole locations Mounting Directly to the Wall Q Control Wire sss Wall Surface Plastic Anchors for Wall Installation Mounting to Junction Box Junction Control Wire Sensor Subbase without Cover Seal these areas before mounting the subbase Sensor Subbase
145. ime Clock 91 Fan Bearings 100 Fan Belt Tension 100 Fan Button 67 Fan Drive 99 Fan shaft and motor sheave alignment 99 Field Supplied Occupied Unoccupied Input on the RTM 91 Filter Switch 90 Flow Switch Maintenance 109 FROSTAT 97 Full Capacity Morning Warmup 91 G GBAS 0 5 VDC Module Comm Failure 113 GBAS Analog Input Setpoints 83 GBAS Analog Inputs 82 GBAS Binary Input 82 GBAS Binary Outputs 82 GBAS Demand Limit Relay 82 GBAS Diagnostics 82 GBAS Input Voltage Corresponding Setpoint 83 General Waterside Recommendations Cooling Towers 35 Generic Building Automation System Module 82 H Head Pressure Control 89 Heat Failure 113 Heat Module 80 Heat Module Auxilliary Temperature SCXG SVX01B EN Sensor Fail 113 eat Module Comm Failure 114 58 80 Location Recommendations 58 igh Duct Static Switch 90 igh Duct Temp Thermostat 90 igh Duct Temperature Thermostat 86 igh duct thermostat can be reset 90 oldtemp Button 67 uman Interface 58 uman Interface Module 80 uman Interface Panel 5 ydronic Coil Installation 45 ydronic Heat 94 y Icon Descriptions 71 ICPB 61 Initial Power Up 66 Inlet Guide Vane 86 Inlet Guide Vanes 106 nput Devices and System Functions 89 nspecting and Cleaning Coils 107 nspecting and Cleaning the Drain Pan 98 nspecting and Cleaning the Fan 98 Installation Preparation 10 nstalling the Remote Human Interface Panel 5
146. in control panel Extra filters sheaves and belts ship in the unit s fan motor section Condenser plugs spring isolators and isopads ship in the unit s bottom left side Receiving Checklist Complete the following checklist immediately after receiving unit shipment to detect possible shipping damage Inspect individual cartons before accepting Check for rattles bent carton corners or other visible indications of shipping damage If a unit appears damaged inspect it immediately before accepting the shipment Make specific notations concerning the damage on the freight bill Do not refuse delivery Inspect the unit for concealed damage before it is stored and as soon as possible after delivery Report concealed damage to the freight line within the allotted time after delivery Check with the carrier for their allotted time to submit a claim SCXG SVX01B EN Installation Do not move damaged material from the receiving location It is the receiver s responsibility to provide reasonable evidence that concealed damage did not occur after delivery Do not continue unpacking the shipment if it appears damaged Retain all internal packing cartons and crate Take photos of damaged material if possible Shipping Covers Metal Channel Shipping Skid NOTE 1 Remove 4 center channels The filter rack is to be used with 4 filters e TRANE O Notify the carrier s terminal of the dam
147. in normal run mode 3 Four digits used to display the time of day in normal run mode Also used in Programming Mode override timer setting menu and options menu 4 Time of day colon used on the time of day clock The colon blinks to indicate the UCM system is functional 5 AM and PM are used to indicate the time of day when using a 12 hour clock AM and PM are not used when a 24 hour clock is selected 6 DAYS and HOURS are used to set the override timer period 7 Displayed in temporary manual OVERRIDE mode and when setting the override timer 8 Only used when setting the override timer 9 Displays the desired state of either OCCUPIED or UNOCCUPIED in the Programming Run and Menu 10 The padlock symbol indicates that the keyboard lockout is in effect 11 Operating mode selection box 12 Displayed in normal run mode when displaying the actual room temperature 13 Displayed in option setting mode only 14 Digits used to display temperature 15 HEAT and COOL have two functions they indicate UCM status in normal run mode and indicate which type of setpoint is DESIRED during programming and override setting 16 Only used during programming and override setting to indicate the DESIRED setpoint temperature 17 Flashes when check filter timer is elapsed 18 Flashing cooling fail status indicator 19 Only used during UCP self test mode 20 Flashing service status indicator and fan failure 21 Flash
148. in step 1 Enter the time of day and days of week just as in the programming steps above The old program is overwritten with the new selections Press Prog to store the new program 3 To delete an individual program select the program as in step 1 and press h and m keys until appears in the display Press either Prog or 1 key until flashes The program is deleted after a few seconds Manual Override While in the run mode G symbol is displayed pressing the key will reverse the load status switch load off if itis on or switch it on if it is off A hand symbol appears in the display to indicate the override is active At the next scheduled switching time automatic time control resumes eliminating the override Pressing the key a second time appears in the display indicating the load is permanently on Pressing the amp key a third time O appears in the display indicating the load is permanently off Pressing the key a fourth time returns to automatic 5 appears in the display All days shown in the respective blocks will switch on or off at the selected hour and minute 73 e TRANE Unit Startup Procedures 1 Check all electrical connections for tightness 2 For water cooled units gain access to the liquid line service valves in the unit s left lower section Note Verify the liquid line service valve is ope
149. ing charge of dry nitrogen Before installing the unit refrigerant piping momentarily depress either the suction or discharge line access valve to verify the holding charge has not been lost If no nitrogen escapes the access valve leak test the entire refrigerant system to determine the leak source Use a halogen leak detector a halide torch or soap bubbles to leak test After finding a leak remove the test pressure and repair the leak Retest the unit to ensure all leaks are repaired Brazing Procedures Proper brazing techniques are essential when installing refrigerant piping The following factors should be kept in mind when forming sweat connections 1 When heating copper in the presence of air copper oxide forms To prevent copper oxide from forming inside the tubing during brazing sweep an inert gas such as dry nitrogen through the tubing A nitrogen flow of 6 to 10 cubic feet per hour is sufficient to displace the air in the tubing and prevent oxidation of the interior surfaces Use a pressure regulating valve or flow meter to control the flow 2 Ensure that the tubing surfaces requiring brazing are clean and that the tube ends are carefully reamed to remove any burrs 3 Make sure the inner and outer tubes of the joint are symmetrical and have a close clearance providing an easy slip fit If the joint is too loose the connections tensile strength is significantly reduced Ensure the overlap distanc
150. ing heating fail status indicator 22 Used in programming mode to set HEAT SUPPLY AIR COOL SUPPLY AIR and MORNING WARMUP temperatures SCXG SVX01B EN Programming the Time Clock Option Setting the Time Important Depress reset key before beginning to set time and program 1 Select military 24 00 hr or AM PM 12 00 hr time mode by depressing and holding the h key while pressing 1h key to toggle between military and AM PM AM appears in the display when in AM PM mode 2 Press and hold down key 3 If setting the time when daylight savings time is in effect press 1h key once 1h will appear in display 4 Set hour with h key If AM or PM does not appear in display the unit is in military time See note above to change display 5 Set minutes with m key 6 Press Day key repeatedly to the day of the week 1 is Monday 7 is Sunday 7 Release key colon will begin flashing Note If keys h or m are kept de pressed for longer than 2 seconds a rapid advance of figures will result The Digi 20 electronic time switch is freely programmable for each day of the week in one minute increments For easy and quick programming the following 4 block programs are available Monday through Sunday Monday through Saturday e Monday through Friday e Saturday and Sunday SCXG SVX01B EN Installation e TRANE Programming Follow the instructions below fo
151. ing screw to deter access by unauthorized person nel Additionally the RHI can control up to four different units HI Location Recommendations The HI microprocessor module is mounted inside a molded plastic enclosure for surface mounting It is not weatherproof Therefore it is only applicable for indoor use Locate the RHI panel in an area that will ensure the communication link between the panel and the unit s does not exceed 5 000 feet maximum or pass between buildings See Table I PR 8 The run length of the low voltage AC power wiring to the remote HI must not exceed three 3 ohms conductor Refer to Table I PR 9 58 Installation Menus Nou d Test N Status Setpoints Diagnostics Start J Setup configuration Service J Custom Mode N a N Previous A Enter J Auto Next Cancel Stop s o Figure I PR 31 Human Interface HI Panel Keypad Table 8 Maximum Communication Link Wiring Length Max Wire Max Capaci tance Length Between Conductors 1 000 ft up to 60 pf ft 2 000 ft up to 50 pf ft 3 000 ft up to 40 pf ft 4 000 ft up to 30 pf ft 5 000 ft up to 25 pf ft Note pf ft picofarads foot Ambient Temperature and Humidity Limits Ambient Operating Conditions Temperature 32 to 120 F Relative humidity 10 to 9096
152. ints are adjustable at the human interface panel Return Air Temperature Sensor The return air temperature sensor is an analog input device used with a return humidity sensor on units with the comparative enthalpy option The sensor monitors the return air temperature and compares it to the outdoor temperature to establish which temperature is best suited to maintain cooling requirements It is mounted in the return air path and connected to the ECEM Supply Fan Circuit Breaker Fuses and Overloads The supply fan motor is protected by either circuit breakers fuses or a combination of fuses and overloads dependent upon unit configuration Circuit breakers are used on units without VFDs They will trip and interrupt the motor power supply if the current exceeds the breaker trip value The RTM shuts all system functions off when detecting an open fan proving switch Units with VFDs have fuses to protect the VFD and motor 90 Owner Units with VFD w bypass have fuses to protect VFD circuit and overloads to protect the motor when in bypass Supply Air Temperature Low Limit The supply air temperature low limit function uses the supply air temperature sensor input to modulate the economizer damper to the minimum position if the supply air temperature falls below the occupied heating setpoint temperature Supply Air Temperature Sensor The supply air temperature sensor is an analog input device It monitors the supply air
153. it SEE DETAIL B FOR English inches ON PAGEA SEE DETAIL ON PAGE 20 FILTER ACCESS FILTER ACCESS 27 5 8 WATER OUTLET 4 5 8 J 7 1 2 SEE DETAIL A SEE DETAIL 24 3 4 ON PAGE 21 FRONT VIEW WATER INLET ON PAGE 21 2 1 2 __ 7 1 2 17 WATER OUTLET WATER OUTLET 14 2 1 2 ENPT __ 14 3 4 WATER INLET WATER INLET 1 1 2 INPT CONDENSER 7 5 8 FITTINGS 4X FT SI VIEW FILTER ACCESS FT SI VIEW FACTORY PIPED UNITS DIRECT CONDENSER CONNECTIONS 93 4 4X ISOLATOR HOLE LOCATION ON BOTTOM OF UNIT VERTICAL DISCHARGE OPTION SEE DETAIL 78 FOR DIMENSIONAL DATA ON PAGE 21 69 FILTER ACCESS FILTER ACCESS 1 1 2 INPT DRAIN 4 1 4 QUICK RELEASE ACCESS PANEL QUICK RELEASE ACCESS PANEL I aye 7 1 2 1 1 2 INPT 4X 4 1 2 1 1 27 INPT ae BACK VIEW 2 DRAIN 7 7 8 WATER INLET 2 1 2 ENPT WATER OUTLET 11 1 2 WATER OUTLET 2 1 27 ENPT 15 1 8 WATER INLET 7 WATER INLET WATER OUTLET RIGHT SIDE VIEW RIGHT SIDE VIEW FACTORY PIPED UNITS DIRECT CONDENSER CONNECTIONS SCXG SVX01B EN 17 e TRANE Installation SCWG SIWG Unit HORIZONTAL DISCHARGE OPTION Metric mm DAT SEE DETAIL ON PAGE 21 ONPAGE21 N uv N n ul o lt 1448 3 c u ul 2 902 I 702 17 n MEG 2197
154. ith chilled water cooling Reason for Diagnostic A low air temp limit trip is detected continuously for more than one second This can occur if 114 Diagnostic Troubleshooting the hydronic heat low air temp limit input closes for gt 1 second or if the chilled water low air temp limit trip input opens for 1 second On units with both hydronic heat and chilled water both low air temp limit inputs are active and the unit will respond in the same manner regardless of which input is used UCM s Reaction The UCM will initiate the following actions a An open all water valves request is issued to the heat module function causing any steam hot water or chilled water valves on the unit to open b An all heat off request is issued to the heat control function c A fan off request is sent to the supply fan control function d A close damper request is sent to the economizer actuator control function Reset Required PMR A manual reset is required after the low air temp limit trip condition clears The diagnostic can be reset at the unit mounted human interface by Tracer Summit or by cycling power to the RTM Low Pressure Control Open Circuit 1 2 3 or 4 Problem The Low Pressure Control LPC for Ckt 1 2 3 or 4 is open Check State of refrigerant charge for ckt 1 2 3 or 4 Reason for Diagnostic The Ckt 1 LPC input is detected open as described in the compressor protection fun
155. ith supply air temperature control entering the unoccupied mode the following sequence will occur e Heating cooling functions cease and the economizer option closes fully The supply fan shuts down for proper cool down time of the heat exchanger However the supply fan may remain on for a short period of time e After the supply fan shuts down the occupied unoccupied relay energizes and the IGV option fully opens Also the VAV box stroke time begins The VAV box stroke time is field adjustable to allow time for VAV boxes to go to the full open airflow position e After the max VAV box stroke time expires and the IGVs are fully open the supply fan economizer if enabled compressors and heat enable to satisfy the unoccupied zone temperature setpoints Note Unoccupied economizer operation can be enabled or disabled at the HI or using Tracer Summit For units without volume control entering the unoccupied mode the following sequence will occur occupied unoccupied relay energizes and the economizer option fully closes e The fan mode is set to auto and the unit will control to the unoccupied zone temperature setpoints With MWU enabled at the HI if the zone MWU Ventilation Enable MWU ventilation Enable Offset MWU Figure O SO 1 Typical cycling morning warmup cycle SCXG SVX01B EN temperature is below the MWU setpoint the unit enters the MWU mode Morning Warmup This featu
156. ize the lowest possible enthalpy level when considering economizer operation In addition it receives space pressure information to maintain the space pressure within the setpoint control band Refer to the Figure O GI 1 for humidity vs voltage values An optional temperature sensor can be connected to the VCM to enable control of a field installed fresh air preheater Also a field provided CO sensor can be connected to the VCM to control CO reset The reset function adjusts the minimum cfm upward as the CO 1 0 concentrations increase The maximum d effective reset setpoint value for fresh 07 air entering the unit is limited to the 8 0 6 system s operating cfm Table O GI 5 lists 5 the minimum outside air cfm vs input 031 voltage 0 2 1 Table 5 Minimum Outside Air 0 10 20 30 40 50 60 70 80 90 100 Setpoint w VCM Module and Traq Percent Relative Humidity Sensing Unit Input Volts CFM SXWG 20 0 5 4 5 vde 6 350 8 500 Figure 1 Relative Humidity vs SXWG 25 05 45 vde __ 7 250 10 625 Voltage SXWG 30 0 5 4 5 vde 7 250 12 750 SXWG 35 0 5 4 5 vdc 7 250 14 875 SXRG 20 0 5 4 5 vde 7 250 8 500 SXRG 25 0 5 4 5 vdc 7 250 10 625 SXRG 32 0 5 45 vde 7 250 13 600 Assembly located ingide the Filter Compartment Trang Tube From Tee to Low Side of trangducer Tube From High Side of Veloci
157. kers 89 Compressor Contactor Fail 112 Compressor Cycling 95 Compressor Isolators 39 Compressor Lead Lag Operation 95 Compressor Module 80 Compressor Motor Winding Thermo stats 89 Compressor Safety Devices 96 Compressor Stages 95 Compressor 112 Compressors 95 Condensate Drain Connections 34 Condenser Connections 34 Condenser Temp Sensor Failure 112 condensing temperature rises above the lower limit 89 Connecting to Tracer Summit 62 Constant Volume Zone Sensor 55 Constant Water Flow 84 Control Options 5 Control Power 37 Control Sequences of Operation 91 Cooling 93 Cooling Capacity Percent 96 Cooling Tower Interlock 80 Cooling Airside Economizer 93 Cooling Waterside Economizer 93 Cycling Capacity Morning Warmup 91 D Day Button 67 Daytime Warmup 94 Diagnostics 112 Dirty Filter 112 Dirty Filter Sensor Option 86 Draining the Coil 107 Duct Connections 33 Ductwork 63 E ECEM 81 ECEM Communications Failure 112 Electric Heat 94 Electric Heat Coil Wiring Procedure 46 Electric Heat Installation 46 Emergency Stop 113 Emergency Stop Input 79 Entering Cond Water Temp Sensor Fail 113 Entering Water Temp Sensor Fail 113 Erase Button 67 Evacuation 103 Evap Temp Sensor Failure 113 Evaporator Coil Frost Protection 97 Evaporator Temperature Sensor Frostat 89 EXHAUST sequence 80 Exhaust Comparative Enthalpy Module 81 External Auto Stop Switch 78 External Unit Isolation 16 F Factory Mounted T
158. l Reset based on outdoor air temperature Outdoor air cooling reset is sometimes used in applications where the outdoor temperature has a large effect on building load When the outside air temperature is low and the building cooling load is low the supply air setpoint can be raised thereby preventing subcooling of critical zones This reset can lower usage of mechanical cooling thus savings in compressor kW but an increase in supply fan kW may occur Outdoor air heating reset is the inverse of cooling with the same principles applied For both outdoor air cooling reset and heating reset there are three user defined parameters that are adjustable through the human interface panel e Beginning reset temperature e Ending reset temperature Maximum amount of temperature reset Reset based on zone temperature Zone reset is applied to the zone s in a building that tends to overcool or overheat The supply air temperature setpoint is adjusted based on the temperature of the critical zone s This can have the effect of improving comfort and or lowering energy usage The user defined parameters are the same as for outdoor air reset Supply Air Tempering Hot Water and Steam VAV Units Only When supply air temperature falls below the supply air temperature deadband low end the heating valve modulates open to maintain the minimum supply air temperature setpoint Daytime Warmup Units with Supply Air Temperature Control
159. l compressor basis When a compressor starts its timer also starts The compres sor evaporator circuit frost protection can override the minimum timer and reduce the five minute minimum re quired time period When the unit is powered up or manually reset there will be a three to eight minute delay before the first compressor may be turned on as requested by the unit temperature control algorithm Compressor Lead Lag Operation Compressor lead lag is a user selectable feature at the HI panel and is available on all units After each request for compressor operation the lead refrigeration circuit or compressor switches thereby causing a more equitable or balanced run time among compressors When lead lag is enabled each time the system cycles it will alternate between the standard compressor staging and the lead lag staging Using Table O SO 1 a SXWG 30 ton unit will first stage com pressor B then A then AB for first cycle and A then AB for the second cycle Appropriate condenser valves water cooled and condenser fans air cooled will stage with appropriate compressors to maintain saturated condensing temperature Enabling lead lag may drop cooling stage when compared to standard staging See Table O SO 1 for compressor staging Unit Refrigerant Compressor HP Standard Lead Lag SCM Size Circuit Type by Stage Compressor Compressor or Model Digit 5 Staging Staging MC SXWG 20 25 Independen
160. l cause a manual reset diagnostic if the duct static exceeds the preset static limit The static limit is adjustable at the HI SCXG SVX01B EN Control Sequences of Operation Occupied Unoccupied Switching There are four ways to switch occupied unoccupied 1 Night setback zone sensor 2 Field supplied contact closure hardwired binary input to RTM 3 Tracer Summit 4 Factory mounted time clock Field Supplied Occupied Unoccupied Input on the RTM This input accepts a field supplied switch or contacts closure such as a time clock with a rating of 12 mA at 24 VDC minimum Tracer Summit System The Tracer Summit system can control the occupied unoccupied status of the self contained unit Factory Mounted Time Clock A time clock can control the occupied unoccupied status of the self contained unit Unoccupied The unoccupied mode helps conserve energy during times when a building is usually unoccupied When in unoccupied mode the unit will control to the unoccupied setpoints usually a lower heating setpoint and higher cooling setpoint Setpoints can be programmed at the HI Tracer Summit or the night setback zone sensor The unit enters the unoccupied mode when the RTM receives a closed signal MWU Terminate Temperature Morning warmup A Temperature B es lt Terminate 2 Owner e TRANE on the unoccupied input for more than five seconds For units w
161. l remain off for a minimum of three minutes If the LP cutout trips four consecutive times during the first three minutes of operation the compressors on that circuit will lock out and a manual reset diagnos tic initiates Evaporator Temperature Sensor Frostat The evaporator temperature sensor is an analog input device that monitors refrigerant temperature inside the evaporator coil to prevent coil freezing It is attached to the suction line near the evaporator coil with circuits 1 and 2 connected to the SCM MCM and circuits 3 and 4 connected to the WSM The coil frost cutout temperature is factory set at F It is adjustable at the HI from 25 35 The compressors stage off as necessary to prevent icing After the last compressor stages off the compressors restart when the evaporator temperature rises 10 F above the coil frost cutout temperature and the minimum three minute off time elapses Saturated Condenser Temperature Sensors The saturated condenser temperature sensors are analog input devices used on all units They are mounted inside a temperature well located on a condenser tube bend on air cooled units and in the condenser shell on water cooled units The sensors monitor the saturated refrigerant temperature inside the condenser coil and are connected to the SCM MCM for circuits 1 and 2 air or water cooled and WSM for circuits 3 and 4 only water cooled Head Pressure Control Head pressure co
162. ling mode When the unit is in occupied cooling the RTM controls the zone temperature within the cooling setpoint deadband by modulating the economizer option and or staging mechanical cooling on and off as required Supply Air Temperature Control Unit Model Number Digit 9 1 2 3 or 6 When the unit is in occupied cooling the RTM controls the supply air temperature to the specified supply air cooling setpoint SCXG SVX01B EN Owner e TRANE by modulating the economizer option and or staging mechanical cooling on and off as required The changeover relay contacts field supplied must be open on units with hydronic heat for cooling to operate Cooling Upon entering occupied mode the RTM receives an input from either the HI RHI Tracer Summit or the GBAS to start the supply fan The RTM supply fan contacts close and energize the supply fan contactor On units with IGV the fan delays until the fully close When the supply fan starts the fan proving switch closes signaling the RTM that airflow is established Depending on unit options either the IGV will begin to drive open or the VFD will ramp the fan and or the airside economizer dampers will open to the user defined minimum position When cooling request is sent to the RTM from the zone sensor the RTM evaluates the system operating condi tions using the supply air and outdoor temperature input before sending the request to the MCM for mechanical
163. lly sealed 3 D scroll compressor motors utilize internal motor protection and time delays to prevent excessive cycling Unit controls are either an electromechanical thermostat or microprocessor controls on the IntelliPak unit See Figure 1 for a typical unit The hermetically sealed 3 D scroll compressor motors utilize internal motor protection and time delays to prevent excessive cycling The water cooled condensers are shell and tube type with an internal subcooler Condensers are available as mechani Installation cally or chemically cleanable The evaporator fan is double width double inlet and forward curved with a fixed pitch belt drive assembly Frequency drives or inlet guide vanes are optional Motor options are standard efficiency open drip proof ODP or totally enclosed fan cooled TEFC or premium efficiency ODP All water cooled units ship with a full refrigerant and oil charge Air cooled units ship with oil and a dry nitrogen holding charge and require field piping refrigerant connections to the air cooled condensing unit Also air cooled units have two refrigerant circuits Water cooled units have four refrigerant circuits which include a filter drier pressure relief valve liquid line service valve sight glass moisture indicator thermal expansion valve with a sensing bulb and external equalizing line discharge line shrader valve a suction line shrader valve and high and low pressure cutout
164. lowed and the VO Output relay will be deenergized Reset Required PAR An automatic reset occurs after communication has been restored SCXG SVX01B EN SCXG SVX01B EN Diagnostic Troubleshooting e TRANE W WSMI Communications Fail Problem The RTM has lost communication with the WSM Check Field unit wiring between RTM and WSM Reason for Diagnostic The RTM has lost communication with the WSM Reaction The UCM will react as if a freezestat has occurred by issuing e An All Heat On or Mod Output Full Open request to Heat Control eA Fan off request to Supply Fan Control A Close Damper request to Economizer Actuator Control e The water pump to turn on and position all water valves to provide maximum flow through all water source heat exchangers e Disables preheat function if WSM Mixed AirTemp Sensor is selected as Preheat Sensor Reset Required An automatic reset occurs after one complete set of IPC packets is received WSM Mixed Air Temp Sensor Fail b Activation Conditions temperature lt 50 F or temperature gt 209 F and sensor is selected for use by Water Side Economizer Temperature Enable Function or Preheat Function c Time to React 10 sec lt T lt 20 sec e Actions to be Initiated Water Side Economizer Temperature Enable Function uses Supply Air Cooling Setpoint instead of Mixed Air Temperature If Mixed Air Tempera
165. matically circulate water through the economizer and condensers periodically during non operational times This allows fresh chemicals to circulate in waterside heat exchangers This feature is on all units and is defined at the HI Water Piping Options Water piping is factory installed with left hand connections Units can be ordered with either basic piping or intermediate piping Also units with waterside economizers can be set for either variable or constant water flow at the HI See Figures O GI 3 4 and O GI 5 for detailed piping configuration information With compatible piping configurations the unit can be configured to provide 1 Constant water flow with basic or intermediate piping or 2 Variable water flow head pressure control with intermediate piping only Constant water flow is for condenser pumping systems that are not capable of unloading the water pumping system Variable water flow maximizes energy saving by unloading the water pumping system Basic Water Piping This option is available on units without a waterside economizer and with condenser water applications above 54 F 12 2 C that do not require condensing pressure control Left hand water connections and piping are extended to the unit exterior Manifold piping is factory installed Intermediate Water Piping This option provides condensing temperature control when the unit is configured user defined at the HI for variable wat
166. mmable night setback See Figure I PR 30 The timeclock a Digi 20 by Grasslin is inside the control panel but accessible with the control panel door closed This same type timer is also used for pro grammable night setback morning warm up Programming instructions for the Digi 20 timer are in the Program ming section on page 73 Timeclock Installation 1 Ensure operating temperature is within 4to 131 F 2 Locate the time clock at least 5 feet away from any large electrical contact or machinery to avoid possible electrical interference problems 3 Provide a separate independent circuit for the time clock power supply 4 Since all electronic instruments are sensitive to voltage spikes pay close attention tot he following a If possible supply power to the electronic time clock from a phase different than the one supplying power to the load b Provide a suitable Varistor or RC network across the INDUCTIVE LOADS supply terminals to reduce voltage spikes c Place a diode across the DC OPERATED INDUCTOR terminals to eliminate back EMF d HIGHLY INDUCTIVE LOADS especially fluorescent lights may require a relay in which case step a and c apply The timeclock can be surface or flush mounted Lift off the front cover and loosen the two screws on opposite corners Pull off the base s plug with a left to right rolling motion Timeclock Installation Checklist 1 Ensure operating temperature is wit
167. n at unit start up Each compressor suction line contains a low pressure sensor that will shut the compressor down in low pressure situations See Table O SO 2 on page 97 A CAUTION Never manually or automatically pump down below 7 psig This will cause the compressor to operate in a vacuum and cause compressor damage 1 Be sure all system components are properly set and installed 2 Inspect all ductwork and duct connections 3 Remove compressor and fan assembly tie down bolts However on 20 38 ton units do not remove the fan assembly shipping blocks and tie down bolts if the fan speed is 750 rpm or less To start the unit complete the following list in order 1 Apply power to the unit Close the unit disconnect switch option 2 Make sure that the liquid line service valves are open on water cooled units 3 Adjust setpoints at the HI See the ntelliPak Self Contained Programming Guide PKG SVPO1B EN for available unit operating setpoints Refer to the job specifications for proper setpoints Note A sufficient cooling load must be visible to refrigerant circuit controls for the mechanical refrigeration to operate If necessary temporarily reduce the dis charge air setpoint to verify the refrigera tion cycle operation 74 Installation 1 Ensure the fan rotation is in the direction of the arrow on the fan housing If rotation is incorrect first verify the incoming power phasing is correct I
168. ner and Diagnostic Manual CXRC SVX01A EN See Table O GI 10 for CXRC refrigerant connection sizes control board with outside and return air temperature and relative humidity sensors are provided for monitoring outside and return air The sensors are field installed Economizer operation enables when the outside air enthalpy is 3 BTU s lb less than the return air enthalpy During occupied mode the outside air damper opens to 1596 adjustable 0 100956 for ventilation purposes Also the ability to alter the outside air damper position to compensate for VAV supply air modulation is inherent in the unit controls and can be enabled by the operator An analog 2 10 VDC output adjustable 0 10 VDC is provided to modulate the field provided 30 second damper actuators adjustable 1 255 seconds Condenser fans will stage per a user defined setting If the condenser is equipped with head pressure control air modulation on last stage of condenser capacity the condenser airflow will modulate to maintain condensing temperature setpoint Condensing temperature is determined by sensors located at each condenser coil Maximum Airflow Increasing Reset Amount Increasing Concentration Carbon Dioxide Carbon Dioxide Reset Start Maximum Reset Figure O GI 6 CO Reset Function Outside Air vs CO 0 Setpoint Table 10 Remote Air Cooled Condenser Refrigerant Connection Sizes English inches Me
169. ng sequence can be used e Supply fan Off e Supply fan VFD Off 0 Hz if equipped Inlet guide vanes closed if equipped e Outside air dampers Closed e Heat all stages Off Modulating heat output at 0 vdc e Occupied unoccupied output De energized e VO relay Energized e Exhaust fan field installed Off e Exhaust damper field installed Closed PRESSURIZE sequence B This override sequence can be used if a positively pressured space is desired instead of a negatively pressurized space e Supply fan on e Supply fan VFD on 60 Hz if equipped Inlet guide vanes VAV boxes open if equipped e Outside air dampers open e Heat all stages off hydronic heat output at 0 vdc Occupied unoccupied output energized VO relay energized e Exhaust fan field installed off Exhaust damper field installed closed EXHAUST sequence With the building s exhaust fans running and the unit s supply fan off the conditioned space becomes negatively pressurized This is desirable for clearing the area of smoke when necessary i e from an extinguished fire to keep smoke out of areas that were not damaged e Supply fan off e Supply fan VFD off 0 Hz if equipped e Inlet guide vanes closed if equipped e Outside air dampers closed e Heat all stages Off hydronic heat output at 0 vdc e Occupied unoccupied output de energize
170. ns any operating compressor s on that circuit off locks out all compressor operation for that circuit and initiates a manual reset diagnostic Compressor Motor Winding Thermostats A thermostat is embedded in the motor windings of each compressor Each thermostat opens if the motor windings exceed approximately 221 F The thermostat resets automatically when the winding temperature decreases to approximately 181 F Rapid cycling loss of charge abnormally high suction temperatures or the compressor running backwards could cause the thermostat to open During a request for compressor operation if the compressor module detects a problem outside of it s normal parameters it turns any operating compressor s on that circuit off locks out SCXG SVX01B EN Owner e TRANE all compressor operation for that circuit and initiates a manual reset diagnostic Low Pressure Control Low pressure LP control uses a binary input device LP cutouts are mounted on the suction lines near the compressors The LP control contacts close when the suction pressure exceeds 27 4 psig If the LP control is open when a compres sor starts none of the compressors on that circuit will operate They are locked out and a manual reset diagnostic initiates The LP cutouts open if the suction pressure approaches 7 4 psig If the LP cutout opens after a compressor starts all compressors operating on that circuit will turn off immediately and wil
171. nterlock To interlock condenser pump tower with cooling operation wire the cooling tower to an external 115 volt control power source to ground and to control terminal block Normally open closed contacts are provided Heat Module The heat module is standard on all units with factory installed heat It controls the unit heater to stage up and down to bring the temperature in the controlled space to within the applicable heating setpoint Also it includes a LEATPD morning warmup and heating outputs Ventilation Override Module VOM Option The ventilation override module can be field configured with up to five different override sequences for ventilation override control purpose When any one of the modules five binary inputs activated it will initiate specified functions such as space pressurization exhaust purge purge with duct pressure control and unit off Once the ventilation sequences are configured they can be changed unless they are locked using the HI Once locked the ventilation sequences cannot be unlocked The compressors and condenser fans disable during the ventilation operation If more than one ventilation sequence activates the one with the highest priority VOM begins first with VOM E having lowest priority and beginning last A description of the VOM binary inputs follows below UNIT OFF sequence A When complete system shut down is required the followi
172. ntrol is accomplished using two saturated refrigerant temperature sensors on air cooled units and up to four sensors on water cooled units e Air cooled units During a request for compressor operation when the con densing temperature rises above the lower limit of the control band the compressor module SCM MCM sequences condenser fans on If the operating fans cannot bring the condens ing temperature to within the control band more fans turn on As the satu rated condensing temperature ap proaches the lower limit of the control band fans sequence off The minimum on off time for condenser fan staging is 5 2 seconds If the system is operating at a given fan stage below 100 for 30 minutes he saturated condensing temperature is above the efficiency check point setting a fan stage will be added If the saturated condensing temperature falls below the efficiency check point setting fan control remains at the present operating stage If the fan stage cycles four times within a 10 minute period the lower limit tempera ture is redefined as being equal to the lower limit minus the temporary low limit suppression setting The unit will utilize this new low limit temperature for one hour to reduce condenser fan short cycling e Water cooled Units without WSE the condenser valve modulates to maintain an average saturated condenser temperature Units with WSE if econo mizing and mechanical cooling is neces sary the economize
173. o go to a full open airflow position SCXG SVX01B EN Occupied Sequence Of Operation All setpoints can be adjusted using the panel Also cooling heating setpoints can be adjusted in the zone if using one of the zone sensor options BAYSENS020 BAYSENS021 5 5008 5 5010 5 5019 or 5 5014 For a complete list of unit setpoint default values and ranges see the IntelliPak Self Contained Programming Guide PKG SVPO1B EN Occupied Zone Temperature Cooling The unit transitions from unoccupied to occupied when the occupied unoccupied input on the RTM is open for more than five seconds after having been closed This input can be received from Tracer Summit the remote NSB zone sensor the timed override function or a field supplied contact Dependent on unit options and the HI programming the following sequence will occur The unit will begin MWU and then switch to the occupied mode after the MWU setpoint is met e Purge will be enabled by Tracer Summit Then Tracer Summit will enable the occupied mode The unit will switch from unoccupied to occupied control immediately Upon entering occupied mode the IGV option will close while the supply fan remains on The occupied unoccupied relay will de energize Zone Temperature Control Unit Model Number Digit 9 4 or 5 A zone sensor located directly in the space sends input to the RTM while the CV unit is in occupied coo
174. on factors Properly dispose of used materials eTake extra care to properly maintain all service equipment directly supporting refrigerant service work such as gauges hoses vacuum pumps and recycling equipment Stay aware of unit enhancements conversion refrigerants compatible parts and manufacturer s recommendations that will reduce refrigerant emissions and increase equipment operating efficiencies Follow specific manufacturer s guidelines for conversion of existing systems To assist in reducing power generation emissions always attempt to improve equipment performance with improved maintenance and operations that will help conserve energy resources WARNING Do not work in a closed area where refrigerant or nitrogen gases may be leaking A sufficient quantity of vapors may acetylene or air in place of refrigerant and dry nitrogen for leak testing A violent explosion may result causing injury or death WARNING Always use a pressure regulator valves and gauges to control drum and line pressures when pressure testing the system Excessive pressures may cause line ruptures equipment damage or an explosion which may result in injury or death WARNING Do not exceed 200 psig when leak testing the system Damage to the unit could result or an explosion may occur causing injury or death In the event of required system repair leak test the liquid line evaporator coil and sucti
175. on Pressure psig Circuit A Circuit B Circuit C Circuit D Discharge Pressure psig Circuit A Circuit B Circuit C Circuit D Super Heat F Circuit A Circuit B Circuit C Circuit D Liquid Line Pressure psig Circuit A Circuit B Circuit C Circuit D Sub Cooling F Circuit A Circuit B Circuit C Circuit D SCXG SVX01B EN 75 e TRANE installation Water Cooled Units Circuit A Entering Water Temperature F Leaving Water Temperature F Entering Water Pressure psig Leaving Water Pressure psig Circuit B Enter Water Temperature F Leaving Water Temperature F Entering Water Pressure psig Leaving Water Pressure psig Circuit C Entering Water Temperature F Leaving Water Temperature F Entering Water Pressure psig Leaving Water Pressure psig Circuit D Enter Water Temperature F Leaving Water Temperature F Entering Water Pressure psig Leaving Water Pressure psig Air Cooled Units Data taken from outside condensing unit Voltage Amp Draw A B C A B C Entering Air Temperature F Leaving Air Temperature F Refrigerant Pressures at condenser psig Sub cooling at condenser F 76 SCXG SVX01B EN SCXG SVX01B EN Owner e TRANE Points List RTM Module Binary inputs e Emergency stop e External auto stop e Unoccupied occupied e Dirty filter eVAV changeover with hydronic heat Binary outputs eVAV box drive max units only
176. on for Diagnostic The unit is reading a signal that is out of range for the supply air pressure sensor voltage input Input 40mV or Input gt 4 75V Reaction The IGV s will drive closed and the following functions are disabled a SA pressure control b SA static pressure limit Reset Required PAR An automatic reset occurs after the SA temp heating setpoint input returns to within range for 10 continuous seconds or after a different SA temp heating setopint selection source is user defined Supply Air Pressure Setpoint Failure Problem The SA pressure input signal is out of range Reason for Diagnostic The SA pressure setpoint input is sending a signal that is out of range Input lt 1 0 IWC or Input gt 4 3 IWC Reaction The default SA pressure setpoint will become the active SA pressure setpoint Reset Required PAR An automatic reset occurs after the designated SA pressure setpoint source sends a signal within SCXG SVX01B EN range for 10 continuous seconds or after a different SA pressure setpoint source is user defined Supply AirTemp Cool Setpoint Fail Problem The active supply air temperature cooling setpoint is out of range Reason for Diagnostic The input designated as the SA temp cooling setpoint is out is out of range temp lt 35 F or temp gt 95 F 5 Reaction The default Hl set SA temp cooling setpoint becomes the active SA temp cooling setpoint Reset R
177. on line at pressures dictated by local codes and using the following guidelines 1 Charge enough refrigerant and dry SCXG SVX01B EN nitrogen into the system to raise the pressure to 100 psig 2 Use a halogen leak detector halide torch or soap bubbles to check for leaks Check interconnecting piping joints the evaporator coil connections and all accessory connections 3 If a leak is detected release the test pressure break the connections and reassemble it as a new joint using proper brazing techniques 4 If no leak is detected use nitrogen to increase the test pressure to 150 psig and repeat the leak test Also use soap bubbles to check for leaks when nitrogen is added 5 Retest the system to make sure new connections are solid 6 If a leak is suspected after the system has been fully charged with refrigerant use a halogen leak detector halide torch or soap bubbles to check for leaks Evacuation For field evacuation use a rotary style vacuum pump capable of pulling a vacuum of 100 microns or less When connecting the vacuum pump to a refrigeration system it is important to manifold the pump to both the high and low side of the system Follow the pump manufacturer s directions A CAUTION Do not use a Meg ohm meter or apply power to the winding of a compressor while it is under a deep vacuum This may damage the motor windings Refrigerant Charging After leak testing and evacuating the
178. one CSP input returns to its allowable range for 10 continuous seconds or after a different valid occupied zone CSP selection source is user defined 119 e TRANE A After Shipment Accessory Model Number 8 Air Filters 98 Air Cooled Condensers 88 Airside Economizer Installation 48 Airside Economizer Interface 88 Airside Economizer Interface with Comparative Enth 88 Airside Economizer Option 87 Airside Economizers with Trag Damper 87 Ambient Temperature and Humidity Limits 58 Annual Maintenance 110 Auto Changeover 94 Auto Reset S A Static Pressure Limit 112 Basic Water Piping 84 BAYSENO20 Icon Descriptions 72 BAYSENSOOS8 Description 50 BAYSENSO 10 Description 52 BAYSENSO 13 Description 52 5 5014 Description 52 BAYSENSO017B Description 51 5 5019 64 BAYSENSO19 Description 55 BAYSENSO19 Icon Descriptions 71 BAYSENSO19 Keypad and Display Explanation 64 BAYSENSO20 Keypad and Display Explanation 65 BAYSENSO20 Description 55 BAYSENSO 21 Description 51 Brazing Procedures 36 C Cautions 59 Changeover 94 Chemical Cleaning of Condenser and Economizer Coil 108 Cleaning the Condenser 108 Cleaning the Flow Switch 109 CO sensor 87 CO Sensor Failure 112 Coil Fin and External Cleaning 107 Common HVAC Acronyms 2 Communication Link Shielded Twisted 120 Pair Wiring 61 Communication Wiring 62 Comparative Enthalpy Control 87 Component Overview 63 Compressor Circuit Brea
179. oper performance and normal operating life Installation must be in an area where it will be protected from Direct sunlight rain or moisture Corrosive gases or liquids e Vibration airborne dust or metallic particles For effective cooling as well as proper maintenance install the VFD vertically to the ground using four mounting screws There must be a minimum eight inch clearance above and below the VFD A minimum two inch clearance is required on each side Also allow enough clearance for opening the VFD cabinet door This will ensure sufficient air space for cooling Refer to the Dimensions and Weights sections on pages 28 30 for VFD dimensions and weights VFD Electrical Installation Procedure Refer to the National Electric Code section 310 16 for sizing wires 4B 9B All other control wires should be twisted shielded or twisted pair shielded 20 14 AWG with lead length not to exceed 164 feet When using shielded wire the shield sheath must be connected at the VFD only The connection on units with VFD only is J13 S On units with VFD w bypass the connection is ITB1 10 47 e TRANE Airside Economizer Installation Unit Handling 1 Hoist the damper cabinet to the installation location with straps positioned under the skid as shown in Figure I PR 12 Use spreader bars to prevent unit damage during lifting 2 With the damper cabinet at its final location near the unit remove the screws s
180. ory piping tubing assembly ASSEMBLY 4 Table I PR 1 Waterside Economizer Ship Separate Parts List LH temi Pant Description Factory Item Part Qty Description Assembly 1 Piping Figure 6 petal view of ship separate B Assembly 2 LeftHand 7001 2 Tube 2 5 7 x 9 tubing assemblies for waterside econo C Assembly 3 X17110026250 5 Elbow 2 5 s x 2 mizer left hand piping D Assembly 4 4003 1 Tube 2 5 x 26 15 6 E Tube 25 x 16 7 4 1 17 BL 5 8 x 8 Tube 2 W x22 X21040098390 10 ft Gasket X21080406030 1 Insulation 2 58 Rubatex X16120203570 1 Plug 1 1 2 Brass X17150027060 1 Bushing 2 1 2 ftg x 1 1 2 X17170031210 1 Tee 2 59 x 2 1 8 x 2 5 8 4738 1 Tube 2 5 x 19 1 16 4007 1 Tube 2 5 x 14 1 2 4006 1 Tube 2 5 x 19 he SCXG SVX01B EN 43 e TRANE Installation Waterside Economizer with Right Hand Factory Piping Components Table I PR 2 Waterside Economizer Ship Separate Parts List RH Right Hand 4001 1 Tube 2 5 x 9 4607 1 Tube 2 5 x 17 X17110026250 5 Elbow 2 x 2 5 s 4605 2 Tube 2 55 x 9 1 2 X153301770100 1 Water Valve 4008 1 Tube 2 s x 20 1 4 X17170031210 1 Tee 2 9 x 2 1 8 x 2 8 X16120203570 1 Brass Plug 1 1 2 X17150027060 1 Bushing 2 s ftg x 1 1 2 4007 1 Tube 2 5 x 14 1 2 4606 1 Tube 2 5 x 62 4603 1 Tube 2 5 x 11 34 4006 1 Tube 2 9s x 19 34 446
181. out of range for the circuit 1 2 3 or 4 saturated condenser temperature sensor temp 55 F or temp gt 209 F 5 Reaction A Lockout Ckt 1 2 3 or 4 request is issued to the compressor staging control function Reset Required PAR An automatic reset occurs after the circuit 1 2 3 or 4 condenser temp input returns to its allowable range within 10 seconds D Dirty Filter Problem There is a dirty filter Reason for Diagnostic The filter switch input on the RTM is closed for more than 60 seconds continuously UCM s Reaction An information only diagnostic is set Reset Required INFO An automatic reset occurs after the dirty filter input reopens for 60 continuous seconds E ECEM Communications Failure Problem The RTM has lost communication with the ECEM Check Field unit wiring between RTM and ECEM module Reason for Diagnostic The RTM has lost communication with the ECEM UCM s Reaction If the unit has the comparative enthalpy option the economizer enable r e enthalpy function will revert to level 2 enthalpy comparison SCXG SVX01B EN Reset Required PAR An automatic reset occurs after communication has been restored Emergency Stop Problem The emergency top input is open Reason for Diagnostic An open circuit has occurred on the emergency stop input caused either by a high duct temp t stat trip or the opening of field provided contacts switch etc UCMs
182. ove the MWU terminate setpoint 91 e TRANE 92 Owner Timed Ovenide Activation ICS This function is operational whenever the units RTM module is used as the zone temperature sensor source which can be set at the HI panel When this function is initiated by the push of the override button on the zone sensor the unit will switch to the occupied mode Unit operation occupied mode during timed override is terminated by a signal from Tracer Timed Override Activation Non ICS This function is active whenever the unit s RTM module board is selected as the zone temperature source which can be set at the human interface panel When this function is initiated by the push of the override button on the zone sensor the unit will switch to the occupied mode Automatic cancellation of the timed override mode occurs after three hours of operation VAV Drive Max Output This is a single pole double throw relay rated at a maximum voltage of 24 vac 2 amps max The relay contacts of this relay switch when the unit goes from the occupied mode to the unoccupied mode by means of the unoccupied binary input night setback zone sensor or Tracer Summit The contacts will stay switched during the unoccupied and morning warmup mode They will return to the position shown on the unit wiring diagram when the unit returns to the occupied mode The intent of this binary output is to signal the VAV boxes or other terminal devices t
183. p Button Shifts controller to temporary manual override and begins temperature override 7 Fan Button Toggles the fan controller between on and auto mode 8 Mode Button Toggles the controller through its four modes off heat cool and auto if HP version also emer emergency 9 e Indicates day of the week e Indicates begin time in program menu Indicates time setting in temporary override mode SCXG SVX01B EN BAYSENS020 INDICATES TIME OF DAY BY HOUR Installation MornDayEveNite AND MINUTE SuMoTuWeThFrSa _ od INDICATES SUPPLY AIR MORNING OR WARM UP I 1 AFTERNOON MODE Yam INDICATES ROOM TEMP OVERRIDE TIME AND OCCUPIED OR UNOCCUPIED PERIODS INDICATES KEYPAD LOCKOUT STATUS OFF BAYSENSO20 Keypad and Display Explanation 1 Up and Down Buttons Increases or decreased programmed temperature settings in program menu e Shifts to temporary manual override in normal run mode elncreases or decreases temperature while in temporary override menu Pressed together toggles between unoccupied occupied setting 2 Time Adjust Button Used to set the correct time of day Used to set programmed time for temperature variations SCXG SVX01B EN AUTO OPTION INDICATES ROOM TEMPERATURE Figure 2 BAYSENS020 Keypad and display configuration 3 Program Button Toggles between the display control scre
184. page 32 Level or repair the floor before positioning the unit if necessary Allow minimum recommended clearances for routine maintenance and service Refer to unit submittals for dimensions Allow three fan diameters above the unit for the discharge ductwork Return air enters the rear of the unit and conditioned supply air discharges through the top Electrical connection knockouts are on the top left side of the unit Allow adequate space for piping access and panel removal Condenser water piping refrigerant piping and condensate drain connections are on the lower left end panel Note Unit height and connection locations will change if using vibration isolators The unit height may increase up to 57 with spring type isolators Electrical supply power must meet specific balance and voltage requirements as described in the Electrical Requirements section on page 37 L1 Water cooled units only The installer is responsible for providing a condenser main standby water pump cooling tower pressure gauges strainers and all components for waterside piping See the Water Piping section on page 34 for general waterside recommendations L1 Air cooled units only The installer is responsible for providing and installing the remote air cooled condenser and refrigerant piping including filter driers SCXG SVX01B EN e TRANE Installation HORIZONTAL DISCHARGE OPTION SCWG SIWG Un
185. peed modulation The drives will accelerate or decelerate as required to maintain the supply air static pressure setpoint VFD with Bypass Bypass control is an option that provides full nominal airflow in the event of drive failure The user must initiate the bypass Table O GI 9 Supply Fan Horsepower Selections Unit Model HP 2 159 140 15 2 25 SXWG2 KKK KK SXWG 25 30 35 X X X X X X SXRG 20 X X X X X SXRG 25 32 X X X X X SCXG SVX01B EN mode at the HI panel When in bypass mode VAV boxes need to be fully open The self contained unit will control heating and cooling functions to maintain setpoint from a user defined zone sensor Supply air static pressure limit is active in this mode For more detailed information on VFD operation reference the Square D VFD technical manual that ships with the unit Airside Economizer Option Units with the airside economizer option are equipped with the necessary control sequences to use outside air for the first stage of cooling in occupied or unoccupied mode and when ambient conditions are favorable for economizing Inherent in the unit controller is the ability to suppress the setpoint below the normal unit setpoint This allows the building to improve comfort levels when possible and at the same time optimize building mechanical cooling operation for peak operating efficiency An outside air temperature and relative humidity sensor are pro
186. r programming the time clock 1 Press Prog key 1234567 AM will appear in display Pressing Prog key again display will show the number of free programs Fr 20 Press again to RETURN to 1st program 2 Press key ON symbol will appear Pressing the key again will toggle to OFF O Select ON or OFF for the program 3 Press h to select hour for switching time 4 Press m to select minute for switching time 5 If the program is to occur every day of the week 24 hour time control ignore Day key and press Prog key to advance to program 6 For 7 day time control press Day key 123456 Monday through Saturday block of days appears in display Pressing Day key again 123 4 5 Monday through Friday appears in display Repeated presses will cycle through all days of the week and back to 1 through 7 Monday through Sunday Select day or block of days desired 7 Press Prog key and repeat steps 2 through 6a to enter additional programs of ON and OFF times Note that more than one OFF time may be programmed enabling automatic control or manual overrides 8 Press key to enter run mode To review and change programs 1 To review a program at any time press Prog key Programs display in the sequence they were entered with repeated presses of Prog key 2 To change a program select that program as outlined
187. r Install screws removed in step 3 through the damper cabinet s side flanges and into the C channel s corresponding holes 11 Attach ductwork to the top and back dampers according to local codes Field Wiring Connections 12 Open the damper cabinet s door and connect the factory provided plug from the actuator to the factory provided plug in the unit s filter section Cable with spreoder bar 13 Cabinets withTRAQ dampers only Unroll the two rolls of pneumatic tubing located inside the damper cabinet Route these tubes through the cabinet s front upper panel 0 25 dia holes provided Connect them to the two pneumatic tubes protruding from the customer electrical connection panel on the unit Be sure to connect like tubes to each other black to black white stripe to white stripe 14 Cabinets with TRAQ dampers only Locate the bullet sensor and rolled up wiring in the unit s filter section Route it into the damper cabinet and insert the sensor into the sensor mounting clip attached to underside of one of theTraq dampers Figure I PR 13 Proper installation of the airside economizer option SCXG SVX01B EN Connector For 1 4 Tubing SCXG SVX01B EN Installation e TRANE Static Pressure Transducer Installation VAV units only Supply air static pressure controls the inlet guide vane and VFD options A static pressure head assembly ships separate
188. r Summit or by cycling power to the RTM Supply Fan VFD Bypass Enabled a Data used module packet byte bit RTM b Activation conditions supply fan VFD bypass has been activated and supply fan vfd bypass is installed c Time to React 10 sec lt T lt 20 sec d Diagnostic text human interface display SUPPLY FAN VFD BYPASS ENABLED e Actions to be Initiated NONE f Reset The INFO diagnostic is cleared when the supply fan VFD bypass is deactivated T TCI Module Comm Failure Problem The RTM has lost communication with the TCI Check Check field unit wiring between RTM and module Reason for Diagnostic The RTM has lost communication with the TCI module UCM s Reaction All active commands and setpoints provided by Tracer Summit through the TCI will be cancelled and or ignored And where Tracer Summit has been designated as setpoint source local HI default setpoints will be used Reset Required PAR An automatic reset occurs after communication has been restored Tracer Communications Failure Problem The TCI has lost communications with Tracer Summit Check Tracer Summit building control panel is powered up and running properly If so check unit wiring between TCI and Tracer Summit building control panel 117 e TRANE Reason for Diagnostic The TCI has lost communications with Tracer Summit for gt 15 minutes UCM s Reaction All active commands and setpoint
189. ranged in a staggered pattern to maximize heat transfer The coil has round copper supply and return headers with removable cleanout and vent plugs The optional mechanical cleanable economizer has removable cast iron headers to allow easy mechani cal cleaning of the tubes The waterside working pressure is rated for 400 psig 2758 kPa Waterside Economizer Flow Control Units equipped with a waterside economizer can be set from the human interface panel for variable or constant water flow Constant Water Flow Two way modulating control shutoff valves are wired controlled and installed in the unit One valve is located in the economizer s water inlet and the other is in the condenser bypass water inlet When the waterside economizer enables the two way valves modulate to maintain the discharge air temperature setpoint As the economizer valve opens the SCXG SVX01B EN condenser bypass valve closes and vice versa Full water flow is always maintained through the condensers Both valves will close in the event of a power failure See Figures O GI 3 and O GI 5 e Variable Water Flow Two way modulating control shutoff valves are wired controlled and installed in the unit One valve is located in the economizer s water inlet and the other is in the condenser bypass water inlet When the economizer valve is active the condenser bypass valve closes The economizer valve modulates thus water flow through the unit modul
190. re can be enabled at the HI and can be used with factory or field installed heat If MWU is not required disable the function in the setup menu at the HI MWU transitions the zone from unoccupied to occupied It will heat until the MWU setpoint is met The unit is then released to occupied mode Supply duct static pressure is maintained during this sequence MWU can be set at the HI to function as either full or cycling capacity Full Capacity Morning Warmup MWU Full capacity morning warmup uses full heating capacity to heat the zone as quickly as possible Full heating capacity is provided until the morning warmup setpoint is met At this point the unit is released to daytime mode Cycling Capacity Morning Warmup MWU Cycling capacity morning warmup provides a more gradual heating to overcome building sink as the zone is heated Normal zone temperature control with varying capacity is used to raise the zone temperature to the MWU zone temperature setpoint This method of warmup is used to overcome the building sink effect Reference Figure O SO 1 for a pictorial explanation of the cycling MWU se quence Cycling capacity MWU will heat until MWU temperature setpoint is reached Next a 60 minute timer begins If the building load reaches the MWU ventilation setpoint or the 60 minutes expire whichever is first the airside economizer will control to the minimum position MWU will end when the zone temperature rises ab
191. re servicing the unit Failure to do so may result in injury or death from electrical shock or entanglement in moving parts Table 1 SCWG SIWG SCRG SIRG Clearance Requirements Side Distance Purpose Front 42 in 1066 mm NEC code requirement Left 18 in Air cooled units only 36 in 914 mm Refrigeration and waterside component service 77 in Fan shaft removal Right 36 in 914 mm Provides uniform airflow Inlet 18 in 457 mm Provides uniform airflow Air Inlet 18 457 2 mm Minimum SeeTable I 36 914mm Minimum 42 1066 8 mm Minimum Figure 4 Top view of self contained unit showing recommended service code clearances 11 e TRANE Installation Rigging and Unit Handling Before lifting the unit or modular component determine the approximate center of gravity for lifting safety See Figure 5 for assembled modular units and Figure PC 6 for split apart units The center of gravity may vary slightly within the gravity block depending on unit options 7 WARNING Ensure lifting equipment capacity exceeds unit weight by an adequate safety factor to prevent injury death or unit damage Always test lift the unit to determine the exact unit balance and stability before hoisting it to the installation location See Figures 7 and I PC 8 for typical rigging procedures and proper rigging equipment usage Figure I PC 5 A
192. recommendations 8 Air cooled units only model SXRG These units require field installation of a remote air cooled condenser and refrigerant piping See the Refrigerant Piping section on page 36 for general piping recommendations SCXG SVX01B EN SCXG SVX01B EN Installation e TRANE Service Access See Figure 4 and Table 1 for recommended service and code clearances Access to thermostat unit controls is through a hinged access panel door on the front lower left of the unit s compressor section IntelliPak unit control access is through a panel on the middle right of the fan section The panel is secured with an automatic latch and quick acting fasten ers which require a screwdriver to open Removable front unit panels provide access to compressors fan motor inlet guide vane actuator and belts Removable left side panels give access to drive side fan bearing inlet guide vanes condensers and waterside economizer control valve The compressor con denser and fan motor access panels are secured with quick acting fasteners Access panels for evaporator coils expansion and water valves and left fan bearing are sheet metal screws Access to other components for service requires removal of panels secured with sheet metal screws During operation sight glasses are viewable through portholes on the upper right side panel of the fan section Disconnect electrical power source befo
193. red to one of these remote zone sensors wiring must be 18 AWG shielded twisted pair Belden 8760 or equivalent Refer to the specific zone sensor for wiring details It provides the following features and system control functions Remote temperature sensing in the zone Morning warmup sensor Zone sensor for ICS systems Zone temperature averaging When used as a remote sensor for standard zone sensor the thermistor sensor must be disabled BAYSENS008 Description This zone sensor module is for use with cooling heating constant volume units It has four system switch settings heat cool auto and off and two fan settings on and auto The zone sensor provides either manual or automatic changeover control with dual setpoint capability BAYSENS008 features and system control functions include System control switch to select heating mode HEAT cooling mode COOL automatic selection of heating or cooling as required AUTO or to turn the system off OFF Fan control switch to select automatic fan operation while actively heating or cooling AUTO or continuous fan operation ON Dual temperature setpoint levers for setting desired temperature The blue lever controls cooling and the red lever controls heating Thermometer to indicate temperature in the zone This indicator is factory calibrated BAYSENSO 1 Description This zone sensor module is for use with VAV units without night setback It allows the u
194. rmostat Dirty Filter Sensor Option A factory installed pressure switch senses the pressure differential across 86 Owner the filters When the differential pressure exceeds 0 9 inches 23 mm WG contact closure occurs and the HI will display a diagnostic The unit will continue to run until you replace the air filters A field installed indicator device may be wired to relay terminals to indicate when filter service is required Contacts are rated at 115 VAC and are powered by a field supplied transformer Low Ambient Sensor Air Cooled Units The low ambient sensor is field installed on air cooled units Position it in a location subject to ambient temperatures only and not exposed to direct sunlight or exhaust fans The low pressure cutout initiates based on the ambient temperature A time delay on the low pressure cutout initiates for ambient temperatures between 50 zero minutes and 0 F 10 minutes This helps to prevent nuisance low pressure cutout trips Inlet Guide Vane Option Inlet guide vanes IGV are driven by a modulating 0 10 vdc signal from the RTM module A pressure transducer measures duct static pressure and the IGV modulates to maintain the supply air static pressure within an adjustable user defined range The range is determined by the supply air pressure setpoint and supply air pressure deadband which are set through the HI panel IGV assemblies installed on the supply fan inlet regulate
195. roper adjustment the fan rotates freely LITighten locking screws bearing set screws and sheaves bearing locking collars do not wobble when rotated Ductwork Olf using return ductwork to the unit secure it with three inches of flexible duct connector LIExtend discharge duct upward without change in size or direction for at least three fan diameters OUse 3 flexible duct connection on discharge ductwork trunk ductwork to boxes is complete and secure to prevent leaks OWVerify that all ductwork conforms to NFPA 90A or 90B and all applicable local codes Water Cooled Unit Piping LIVerify the condensate drain piping is complete for the unit drain pan Install and tighten the condensate P trap drain plug Olnstall water piping drain plugs economizer header and condenser vent plugs return and supply water connections to the unit and or waterside economizer piping package with recommended valves and piping components Refer to the Water Piping section on page 34 Olnstall unions to allow waterside maintenance Olnstall cooling tower and standby pumps LITreat water to prevent algae slime and corrosion LIPrevent refrigerant piping from rubbing against other objects Air Cooled Units Only LIConnect refrigerant lines Olnstall liquid line filter driers Units with Hydronic Heat LIVerify the entering water temperature sensor is install
196. rride run 7 Intelligent Temperature Recovery 0 Disabled 0 mode The option value shown is in 1 Enabled hours and value selected is five hours 8 Programmable Days Week 0 7 days M TW TES S 0 1 23 days 5 S S When the option menu displays the only 2 2 days M F 5 5 active buttons are the T or arrow and 9 Programmable Periods Day 234 4 the minus and plus button The 7 or 10 Programmable Fan Operation 0 Disallowed 0 4 arrow increment through the available 1 Remote Sensor installed No 0 options by number 1 24 and the 1 Yes minus and plus button toggles 12 Check Filter Interval 0 Disabled 350 through the various option values 2990 t9 selina Nour g p f increments associated with each option number See Display Zone Temperature 0 No 1 Table 1 1 Yes 14 Keypad Lockout Enabled 0 Disabled 1 Note On both programmable zone sensor E 2 5 15 nitial Time Setting Tempora 1 2 3 4 5 options changing either option 9 or 10 will Override Mode bre ry erase the current program To avoid 16 Buzzer Options O KeyPressoniy 1 reprogramming set options 9 and 10 1 Key Fress e Check filter I Key Press eck Filter before programming and System Failures 17 Zone Temperature Calibration Displays current temp 0 offset with any offsets 18 Baud Rate 0 1024 baud 1 1 1200 baud 19 CV or HP Operation 0 CV 0 1 HP 20 Default Cooling setpoint 45 to 98 F 74F Def E E 1
197. rside Economizer Waterside economizing enables when the unit s entering water temperature is below the unit s entering mixed air temperature by 4 F plus the user adjustable economizer approach temperature The approach temperature default is 4 F Waterside economizing disables when the unit s entering water temperature is not below the unit s entering mixed air temperature by at least the water economizer approach temperature default value of 4 F The economizer acts as the first stage of cooling If the economizer is unable to maintain the zone or supply air temperature setpoint the compressor module will bring on compressors as required to meet the setpoint Cooling Airside Economizer On units with an airside economizer a call for cooling will modulate the fresh air dampers open The rate of economizer modulation is based on deviation of the zone temperature from setpoint i e the further away from setpoint the faster the fresh air damper will open The first stage of cooling will start after the economizer reaches full open Note The airside economizer will only function freely if ambient conditions are below the enthalpy control settings or below the return air enthalpy If unit has comparative enthalpy installed If outside air is not suitable for economizing the fresh air dampers drive to the minimum open position A field adjustable factory default setting at the panel or Tracer Summit can provide the input
198. s needed to keep the switch operational To clean the paddle assembly remove it following the procedure below 1 Remove the switch from the unit 2 The paddle assembly and wire retainer clip holds the paddle assembly in the switch body 3 Remove the wire retainer clip by reaching down past the paddle with a pair of slim nosed pliers and gripping the end of the wire Pull up on the wire clip and remove it 4 After removing the wire clip use the pliers to pull the paddle assembly out of the switch barrel Clamp the pliers onto the end of the paddle and remove the paddle assembly It will slide straight out 5 Clean the ferrous particulate from the magnet using a rag or tack cloth The particulate is attracted to the magnet So it is necessary to pull it off It will not simply wipe off 6 After cleaning the magnet replace the paddle assembly into the switch body s barrel However it is important to position the paddle perpendicular to the arrow on the switch s side and place the paddles flat side facing the opposite direction or the arrow Push the paddle assembly in until it hits the barrel cavity bottom 7 Place the spring clip into the switch barrel and push it down with a small flat blade screwdriver until the spring clip engages the groove in the switch barrel 8 When replacing the paddle assembly check the operation by pushing on the paddle s flat side The paddle should swing freely in the direction of
199. s provided the RTM 45 22 85 110 4 66 board for installation of a field supplied 50 19 96 120 376 normally closed N C switch to use Ea A Aes during emergency situations to shut 65 13 49 150 205 down all unit operations When open an 66 13 15 160 1 69 immediate shutdown occurs An 67 12 82 170 140 emergency stop diagnostic enters the 68 1250 180 117 human interface and the unit will require 69 12 19 190 0 985 a manual reset Refer to the unit wiring 70 11 89 200 0 830 diagrams attached to the unit control panel for the proper connection terminals The switch must be rated for 12 ma 24 VDC minimum This input will override all VOM inputs if the VOM option is on the unit Table O GI 3 RTM Setpoint Analog Inputs Box Option quu pepe 2 using Resistance ohms To interlock VAV box operation with 40 10 1084 evaporator fan heat cool modes 45 45 992 wire the VAV boxes air valves to VAV box so 50 899 control connections on the terminal block 55 55 796 Supply Duct Static Pressure Control gt The RTM relies on input from the duct 70 70 500 pressure transducer when a unit is 75 75 403 equipped with or VFD to position the 80 80 305 IGV or set the supply fan speed to NA 85 208 maintain the supply duct static pressure NA 90 111 to within the static pressure setpoint deadband Sensors Table 4 RTM Resistance Value vs System Oper
200. s provided by Tracer Summit through the TCI will be cancelled and or ignored And where Tracer vSummit has been designated as the setpoint source local HI default setpoints are used Reset Required PAR An automatic reset occurs after communication between Tracer Summit and the TCI is restored U Unit HI Communications Failure Problem The RTM has lost communication with the unit mounted local human interface HI Check Field unit wiring between RTM hand local HI Reason for Diagnostic The RTM has lost communication with the unit mounted human interface Reaction A fail safe function in the HI will cause the following sequence a disallow any interaction between the HI and the RTM or any other modules b render all HI keystrokes ineffective c cause the following message to display on the unit mounted HI display Local HI communications loss Check comm link wiring between modules If the unit has a remote HI option then this diagnostic will display as any other automatic reset diagnostic Reset Required INFO An automatic reset occurs after communication is restored between the RTM and the HI When the failure screen clears the general display restores to allow the HI to interact with the RTM again Unoccupied Zone Cool Setpoint Failure Problem The unoccupied zone cooling setpoint input is out of range Reason for Diagnostic The input 118 Diagnostic Troubleshooting d
201. s without night setback It has four system switch settings heat cool auto and off two fan settings on and auto and four LED s The zone sensor provides either manual or automatic changeover control with dual setpoint capability In addition it can be used with 5 5017 BAYSENS010 features and system control functions include e System control switch to select heating mode HEAT cooling mode COOL automatic selection of heating or cooling as required AUTO or to turn the system off OFF e Fan control switch to select automatic fan operation while actively heating or cooling AUTO or continuous fan operation ON e Dual Temperature setpoint levers for setting desired temperature The blue lever controls cooling and the red lever controls heating Thermometer to indicate temperature in the zone This indicator is factory calibrated e Function status indicator lights e SYSTEM ON glows continuously during normal operation or blinks if system is in test mode e COOL glows continuously during cooling cycles or blinks to indicate cooling system failure e HEAT glows continuously during heating cycles or blinks to indicate heating system failure e SERVICE blinks or glows to indicate a problem These signals vary depending on the particular equipment being used Integrated Comfort Systems Sensors for CV and VAV Applications These zone sensor options are for use with cooling heating Integrated Comfor
202. ser to control system operation and monitor unit operating status from a remote location The sensor has a system switch a S A temperature setpoint indicator a local sensor and four LED s BAYSENSO21 features and system control functions include Temperature sensing in the zone e System control switch with mode setting for AUTO and OFF Supply air single temperature setpoint e Function status indicator lights SYS ON glows continuously during normal operation or blinks if system is in test mode COOL glows continuously during cooling cycles or blinks to indicate a cooling system failure HEAT glows continuously during heating cycles or blinks to indicate a heating system failure SERVICE blinks or glows to indicate a problem These signals vary depending on the particular equipment being used 51 e TRANE CV Unit Zone Sensor Option p A Figure I PR 18 BAYSENS010 Dual setpoint manual automatic changeover sensor with system function lights Accessory Model Number Digit 6 F CV and VAV Unit Zone Sensor Options 6 Figure 19 BAYSENS014 Zone temperature sensor w timed override and local setpoint adjustment Accessory Model Number Digit 6 Figure 20 BAYSENSO13 Zone temperature sensor w timed override Accessory Model Number Digit 6 B 52 Installation BAYSENS010 Description This zone sensor module is for use with cooling heating constant volume unit
203. signal that is out of range for 113 e TRANE this input temp lt 55 F or temp gt 209 F UCM s Reaction The functions that designated the heat module auxillary temperature input as their input are disabled Reset Required PAR An automatic reset occurs after the heat module auxillary temperature input returns to its allowable range for 10 seconds Heat Module Comm Failure Problem The RTM has lost communication with the heat module Check Check field unit wiring between RTM and heat module Reason for Diagnostic The RTM has lost communication with the heat module UCMS Reaction An all heat off request is sent to the heat operation function If the unit has staged gas or electric heat all heat module outputs will be zeroed and deenergized If the unit has hydronic heat or chilled water installed the unit will turn off the supply fan and close the outside air damper upon the occurrance of a heat module comm failure A failsafe function in the heat module will cause all water valves to be set to 10096 to provide full water flow Unless used for switching purposes air handlers with chilled water and mod gas or chilled water and hydronic heat all binary outputs will be deenergized Reset Required PAR An automatic reset occurs after communication has been restored L Low Air Temp Limit Trip Problem The low air temp limit has tripped Units with steam or hot water heating or air handlers w
204. ssembled unit gravity block location Table 2 Gravity Block Dimensions Re 2 0 SXWG 36 14 38 12 To prevent injury or death and SXRG 36 16 40 12 unit damage always test lift the unit to determine actual center of gravity See Figures I PC 5 and I PC 6 Fan Section Only Figure 6 Split apart unit gravity block location 12 SCXG SVX01B EN e TRANE Installation Rigging and Handling Spreader Bars Unit Shipping 1 Position rigging sling under wood shipping skid 2 Use spreader bars to avoid unit damage 3 When using a forklift exercise caution to prevent unit damage 4 Use the standard fork length to lift one end and drag or pull unit while skidding the opposite end 5 The unit center of gravity will fall within center of gravity block at various locations depending on unit options 6 Use hooks to lift fan section only Do not hook into open channels to lift unit 7 See unit nameplate for unit weight 8 Do not stack units A CAUTION Do not use hooks to lift unit or hook into open channels to lift unit This could cause unit damage Spreader Bars INSERT HOOK AS SHOWN TYPICAL FOR 4 PLACES Compressor Section Fan Section Figure 8 Split apart modular unit proper rigging SCXG SVX01B EN e TRANE installation Split Apart Unit Assembly 1 Ensure the tagging information on the fan se
205. ssure exceeded the S A static pressure limit setpoint for at least one second continuously UCM s Reaction A supply air pressure shutdown signal is sent to the following functions a Compressor staging control b Economizer actuator control c Heat operation d Supply fan control e IGV VFD control f Exhaust fan control g Exhaust actuator control Reset Required PAR An automatic reset occurs after the IGV close The supply fan is not allowed to restart for 15 seconds after the diagnostic occurs An auto reset will also occur if the unit cycles out of occupied mode and back C CO Sensor Failure Problem The VCM CO sensor input signal is out of range Check Check field unit wiring between sensor and VCM Reason for Diagnostic The unit is reading a signal that is out of range for the CO sensor transducer input UCM s Reaction The CO reset function disables 112 Diagnostic Troubleshooting Reset Required PAR An automatic reset occurs after the CO sensor transducer input receives a signal that is within range for ten continuous seconds Compressor Contactor Fail Circuit 1 2 3 or 4 Problem The compressor contactor for Ckt 1 2 3 or 4 has malfunctioned Reason for Diagnostic The circuit compressor proving input is detected closed continuously for more than three seconds while neither compressor output on that circuit closes Reaction A lockout ckt 1 2 3 or
206. subbase enable or disable applicable functions i e morning warmup economizer minimum CFM override during unoccupied status Fahrenheit or Centigrade supply air tempering remote zone temperature sensor 12 24 hour time display smart fan and computed recovery During an occupied period an auxiliary relay rated for 1 25 amps 30 volts AC with one set of single pole double throw contacts activates Figure 24 BAYSENS019 Programmable night setback sensor Accessory Model Number Digit 6 G Variable Air Volume Zone Sensor BAYSENS020B Description This seven day programmable sensor with night setback has four periods for occupied unoccupied programming per day Either one or all four periods can be programmed If power is interrupted the program retains in permanent memory If power is off longer than 2 hours only the clock and day may have to be reset The zone sensor keypad allows you to select occupied unoccupied periods with two temperature inputs cooling supply air temperature and heating warmup temperature per occupied period The occupied cooling setpoint ranges be tween 40 and 80 F The warmup setpoint ranges between 50 90 F with a 2 degree deadband The unoccupied cooling setpoint ranges between 45 and 98 EThe heating setpoint ranges be tween 43 and 96 F The liquid crystal display LCD displays zone temperature setpoints week day time and operational mode symbols The DIP switches on
207. system charge liquid refrigerant into the system through the liquid line valve After some refrigerant has entered each circuit charge gaseous refrigerant into the suction line shrader valve with the compressors running SCXG SVX01B EN Owner e TRANE CAUTION Caution Do not operate the compressors without some refrigerant in each circuit Failure to do so may damage the compressors Charge refrigerant into the system by Refrigerant System Special Note on Refrigerant Emissions Follow the Trane recommended procedures on operation maintenance and service to endure refrigerant conservation and emission reduction Also pay specific attention to the following e When removing refrigerant from air conditioning or refrigerating equipment recover for reuse recycling reprocessing reclaim or properly destroy it e Always determine possible refrigerant recycling or reclaiming requirements before beginning recovery Questions about recovered refrigerants and acceptable refrigerant quality standards are addressed in ARI Standard 700 Use approved containment vessels and safety standards when shipping refrigerant containers eTo minimize emissions while recovering refrigerant use recycling equipment Always attempt to use methods that will pull the lowest possible system vacuum while recovering and condensing refrigerant into containment e When leak checking with trace refrigerant and nitrogen use
208. t 10 10 B AB A AB MCM SXRG 20 SXWG 30 Independent 15 10 SXRG 25 SXWG 35 Independent 15 15 B AB A AB MCM SXRG 32 SCXG SVX01B EN 95 e TRANE 96 Owner Compressor Safety Devices The compressors have motor temperature cutout switches in the motor windings These switches are provided to take the compressors off line during high motor winding temperature conditions If a compressor low pressure cutout opens during compressor start up the UCM will not shut the compressor off during the first two to three minutes after start up This prevents possible nuisance trips during low ambient start conditions See Table O SO 2 Each compressor s discharge line contains a high pressure cutout Under abnormal operating conditions the cutout will open to stop compressor operation Table O SO 2 Pressure Cutouts Unit High Pressure Low Pressure Model Cutout Cutout SXWG 360 270 20 35 SXRG 425 350 12 27 Step Control Steps of mechanical cooling are control based on supply air or zone temperature See Table O SO 1 on page 95 for compressor staging Capacity is based on an integrating control concept The unit capacity matches the existing load and maintains an average supply air temperature within the supply air setpoint temperature control band region The supply air temperature control band is centered around supply air tempera ture setpoint and is adjustable from 2 to 12 F In a steady st
209. t System ICS systems BAYSENSO 14 Description This electronic analog sensor features single setpoint capability and timed override with override cancellation BAYSENSO 4 features and system control functions include Remote temperature sensing in the zone A timed override button to move an ICS or a building management system from its unoccupied to occupied mode e Thumbwheel for local setpoint adjustment e A cancel button to cancel the unoccupied override command BAYSENSO 13 Description This electronic analog sensor features single setpoint capability and timed override with override cancellation It is used with a Trane Integrated Comfort system BAYSENS013 features and system control functions include e Remote temperature sensing in the zone e A timed override button to move an ICS or a building management system from its unoccupied to occupied mode e Cancel button to cancel the unoccupied override mode SCXG SVX01B EN Figure 21 Standard zone sensor 5 5017 ships with all units SCXG SVX01B EN Installation e TRANE Zone Sensor Installation All sensor options ship in the main control panel and are field installed Programmable option installation procedures are on page 55 Mounting Location Mount the sensor on the wall in an area with good air circulation at an average temperature Avoid mounting space temperature sensor is areas subjec
210. t nameplate identifies the unit model number appropriate service literature and wiring diagram numbers It is mounted on the left end of the unit control panel e TRANE Model Number Description Installation Each self contained unit has a multiple character model number unique to that unit To determine a unit s specific options reference the model number on the unit nameplate using the model number explanation below SC WGN 20 4 2 2 10 065 B A 1 010 AACF A 1 10 20 123 4 5 67 8 9 1011 12 13 14 1516 1718 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Digit 1 Unit Model S Self Contained Digit 2 Unit Type C Commercial Industrial Digit 3 Condenser Medium W Water Cooled R Remote AirCooled Digit 4 Development Sequence G Modular Series Digit 5 Refrigerant Circuit Configuration N Independent Digit 6 7 Unit Nominal Capacity 20 20Tons Water or Air Cooled 25 25Tons Water or Air Cooled 30 30Tons Water Cooled Only 32 32Tons Air Cooled Only 35 35Tons Water Cooled Only Digit 8 Unit Voltage 6 200Volt 60 Hz 3 ph 4 460 Volt 60 Hz 3 ph 5 575Volt 60 Hz 3 ph Digit 9 Air Volume Temp Control 1 l Pak amp IGV and Supply AirTemp Ctrl 2 Pak amp VFD and Supply Air Temp Ctrl Pak amp VFD w Bypass Supply AirTemp Ctrl Pak w o Vol CTRL w Zone Temp Cool Pak w o Vol CTRL w ZoneTemp Heat Cool 6 l P
211. t to the following conditions e Drafts or dead spots behind doors or in corners Hot or cold air from ducts Radiant heat from the sun or appliances Concealed pipes and chimneys e Unheated or non cooled surfaces behind the sensor such as outside walls Airflows from adjacent zones or other units To mount the sensors remove the dust cover and mount the base on a flat surface or 2 x 4 junction box Sensors ship with mounting screws Mounting the Subbase Remove the zone sensor cover from subbase and mount subbase on the wall or on a 2 x 4 junction box Route wires through the wire access hole in the subbase See Figure I PR 22 on page 54 Seal the hole in the wall behind the subbase Wiring A WARNING Disconnect all electric power including remote disconnects before servicing Failure to do so before servicing may cause severe personal injury or death Note Guidelines for wire sizes and lengths are shown in Table 7 The total resistance of these low voltage wires must not exceed 2 5 ohms per conductor Any resistance greater than 2 5 ohms may cause the control to malfunction due to excessive voltage drop Note Do not run low voltage control wiring in same conduit with high voltage power wiring 1 Run wires between the unit control panel and the zone sensor subbase To determine the number of wires required refer to the unit wiring diagrams 2 Connect the wiring to the appropr
212. tained Ship With Accessory Model Number Description P 5 Ww G S A 1 1 0 AO 1 2 3 4 5 6 7 8 9 10 11 Digit 1 Parts Accessories P Parts Accessories Digit 2 Unit Model S Self Contained Digit 3 Shipment W With Unit Digit 4 Development Sequence F Signature Series G Modular Series Digit 5 Sensors and Other Accessories S Sensors Digit 6 Sensors and Thermostats field installed A BAYSENS017 Zone Temp Only CV and VAV BAYSENS013 Zone Temp with Timed Override Button CV and VAV SCXG SVX01B EN C BAYSENS014 Zone Temp with Timed Override Button Setpoint Dial CV D BAYSENS023 Remote Min Position Potentiometer Control OA Damper E BAYSENS008 CV Zone Sensor F BAYSENS010 CV Zone Sensor with Indicator Lights G BAYSENS019 CV Programmable Night Setback Sensor H BAYSENS021 Zone Sensor with Indicator Lights J BAYSENS020 VAV Programmable Night Setback Sensor K Remote Sensor Kit L Outside Air Temperature Sensor Kit M Outside Air Humidity Sensor Kit N BAYSTAT010 2 Heat 2 Cool Thermostat Digit 33 Control Interface Options Generic BAS Module GBAS B Ventilation Override Module VOM C z Tracer Comm Interface Module TCI D Remote Human Interface RHI E GBAS and TCI F VOM and TCI G GBAS and VOM GBAS and RHI and RHI K TCI and RHI L GBAS VOM and TCI M GB
213. tandard current rating of over current protective device use the next lower standard rating for the marked maximum rating For units with the dual power option there are two circuits that need calcula tions using the formulas above circuit 1 fans circuit 2 compressors If the rating value determined does not equal a standard current rating of over current protective device use the next lower standard rating for the marked maximum rating 38 Installation Table I ER 1 Number of Compressors per Unit SCWG SIWG 20 25 30 35 SCRG SIRG 20 25 32 10 HP 2 2 1 15 HP 1 2 Table 2 SCWG SIWG Compressor Motor Data 200V 460V 575V HP RLA LRA RLA LRA RLA LRA 10 33 1 269 14 4 117 11 5 94 15 46 9 409 20 4 178 16 4 143 Table ER 3 SCRG SIRG Compressor Motor Data 200V 460V 575V HP RLA LRA RLA LRA RLA LRA 10 38 4 269 16 7 117 13 4 94 15 55 0 409 24 1 178 19 1 143 Table 4 Fan without VFD 200V 460V 575V HP LRA 5 16 1 105 67 46 5 4 37 7 5 25 0 152 10 8 66 82 54 10 32 9 193 142 84 11 4 66 15 448 290 20 3 126 16 2 102 20 61 0 373 25 0 162 20 0 132 25 74 0 469 31 0 204 24 2 162 Table 5 Fan with VFD 200V 460V HP LRA LRA 75 29 0 152 14 3 66 10 38 3 193 18 2 84 15 42 7 290 25 3 126 20 55 2 373 32 0 162 25 67 8 469 32 7 204 Table 6 Electric Heat Single Stage SCWG SIWG SCRG SIRG Heat 200V 460V Size Size Kw Amps Amps 20 20 16
214. temporary manual override settings Depressing either the up or down arrow keys while in temporary manual override run mode will cause the ZSM to toggle to temporary manual override menu The erase button will turn off the check filter icon if displayed e Simultaneously depressing and holding the positive and negative sides of the minus plus key for four seconds will lock out the keypad eTime is not adjustable in this mode OVERRIDE OCCUPIED ROOM TEMP Figure 7 Temporary manual override run mode screen SCXG SVX01B EN e TRANE installation Option Menu and Keypad Operation Table 1 Zone Sensor BAYSENS019 Option Menu Settings The operation menu sets all MENU C RUN A 2 224 Option Description Value Factory Setting programmable options built into your B B 1 Morning Warmu 0 Disabled 0 ZSM All options are retained in i P 1 Enabled permanent EEPROM memory 2 Economizer minimum 0 Disabled 1 Position override 1 Enabled To access the option menu display 3 Temperature Scale 0 Fahrenheit 0 simultaneously depress and hold the 1 Enabled mode button and program button forfour 4 Supply AirTempering 22 Deed 0 seconds See Figure 8 i Tame Ci 5 The example in Figure 8 shows option 1224 hours 15 displayed and indicates the initial timer 5 Smart Fan 1 setting In the temporary ove
215. ter and abnormally high condensing tem peratures To maintain maximum condenser efficiency the condenser must remain free of built up scale and sludge Clean the condenser either mechanically or chemically Mechanical Cleaning of Condenser and Economizer Coils 1 Turn off the condenser supply water Remove drain plugs discussed in the Draining the Coil section on page 94 2 Remove the condenser s left side to expose the condenser tubes 3 Rotate a round brush through the tubes to loosen contaminant 4 Flush tubes with water to push the sludge out through the drain opening in the bottom of the supply header and the return pipe 5 To clean the economizer tubes remove the cast iron header plates at the coil s right end between the inlet and outlet headers 4 row coils 2 row coils do not have cover plates at right end Rotate round brush through tubes from left end to loosen contaminants Flush tubes with water 6 Replace condenser end plates and clamps The end plates must be centered when tightening the clamp 7 Replace coil headers with gaskets and torque bolts to 50 ft Ib 8 Replace drain and vent plugs Chemical Cleaning of Condenser and Economizer Coil Chemical cleaning removes scale deposits built up by minerals in the water For a suitable chemical solution consult a water treatment specialist The condenser water circuit is composed of copper steel and cast iron The chemical supply house s
216. thalpy Control Comparative enthalpy controls the economizer operation and measures temperature and humidity of both return air and outside air to determine which source has lower enthalpy This allows true comparison of outdoor air and return air enthalpy by measurement of outdoor air and return air temperatures and humidities A factory installed control board with field installed outside and return air temperature and relative humidity sensors allows monitoring of outside and return air Note If comparative enthalpy is not ordered the standard method compares outdoor air enthalpy with the fixed reference enthalpy The reference enthalpy is set at the human interface panel Units with comparative enthalpy control are equipped with the necessary control sequences to allow using outside air for the first stage of cooling in occupied or unoccupied mode and when ambient conditions are favorable for economizing Inherent in the unit controller is the ability to suppress the setpoint below the normal unit setpoint This allows the building to improve comfort levels when possible and at the same time optimize building mechanical cooling operation for peak operating efficiency Economizer operation enables when the outside air enthalpy is BTU S Ib less than the return air enthalpy During occupied mode the outside air damper opens to 15 adjustable 0 100 for ventilation purposes Also the ability to alter the outside air d
217. the arrow This action confirms that the paddle assembly is properly installed 9 Replace the switch into the unit piping using a good pipe thread sealer Tighten the switch so that its final position has the arrow parallel to the water pipe and pointing toward the left end of the unit arrow is pointing in the direction of the water flow 109 e TRANE Periodic Maintenance Checklists Monthly Checklist The following check list provides the recommended maintenance schedule to keep the unit running efficiently Disconnect power source and allow all rotating equipment to stop completely before servicing or inspecting the unit Failure to do so may result in injury or death 1 Inspect unit air filters Clean or replace if airflow is blocked or if filters are dirty 2 Inspect coils for excess moisture or icing Icing on the coils may indicate low airflow supply restricted airflow from dirty fins evaporator frost protection sensor problems or a shortage of refrigerant flowing through the coil 3 Check that condensate from the evaporator and economizer coils flows freely through the condensate piping traps drain pan and drainage holes Remove algae and or any airflow obstructions 4 Check the condition and tension of fan belts Adjust tension if belts are floppy or squeal continually Replace worn or fraying belts in matched sets Note Check and adjust belt tension at least twice daily the first days of new b
218. tion are either partially 50 or completely disabled 100 to save energy The demand limit definition is user definable at the HI panel Demand limit binary input accepts a field supplied switch or contact closure When the need for demand limiting discontinues the units cooling heating functions become fully enabled again GBAS Analog Inputs The GBAS accepts external setpoints in the form of analog inputs for cooling heating supply air pressure Refer to the unit wiring diagram for GBAS input wiring and the various desired setpoints with the corresponding DC voltage input 82 Owner Any of the setpoint or output control parameters can be assigned to each of the four analog inputs on the GBAS module Also any combination of the setpoint and or output control param eters can be assigned to the analog inputs through the HI To assign the setpoints apply an external 0 5 vdc signal 1 directly to the signal input terminals or 2 to the 5 vdc source at the GBAS module with a 3 wire potentiometer Note There is a regulated 5 output on the GBAS module that can be used with a potentiometer as a voltage divider The recommended potentiometer value is 1000 100 000 ohms The setpoints are linear between the values shown in Table O GI 6 on page 83 Reference Table O GI 7 on age 83 for corresponding input voltage setpoints Following are formulas to calculate input voltage or setpoint SP setpoint IPV input
219. tion box in order to accommodate the emergency heat mode on the ZSM heat pump version 12 Fan mode selection box 13 Displayed in normal run mode when displaying the actual room temperature 14 Displayed in option setting mode only 15 Digits used to display temperature 16 HEAT and COOL have two functions they indicate UCM status in normal run mode and indicate which type of setpoint is DESIRED during programming and override setting 17 Only used during programming and override setting to indicate the DESIRED setpoint temperature 18 Flashes when check filter timer is elapsed 19 Flashing cooling fail status indicator 20 Only used during UCP self test mode 21 Flashing service status indicator and fan failure 22 Flashing heating fail status indicator 23 Operating MODE selection box 71 e TRANE Installation 1 22 21 20 2 oN MornDay EveNite 19 Su Mo Tu We Th Fr Sa TEST 70 00 Check Filter 18 amp nc Desired 17 s eme 1 6 om PUT WM I i 16 Whe Als fy 7 UNOCCUPIED I i 15 MODE 8 m v qi me 10 14 11 12 13 Figure 10 BAYSENS020 complete icon display BAYSENO2O Icon Descriptions Refer to Figure I P 10 for a pictorial view of the written descriptions below 1 The four periods of the day used only during programming mode 2 The seven days of the week used during programming and
220. tric mm Unit Circuit 1 Circuit 1 Circuit 2 Circuit 2 Size Liquid Line Discharge Line Liquid Line Discharge Line CXRC 20 25 29 30 g 1 7 s 1 16 29 16 29 SCXG SVX01B EN Input Devices and System Functions Following are basic input device and system function descriptions used within the UCM network on IntelliPak self contained units Refer to the unit wiring diagrams for specific connections Water Purge During the unoccupied mode water cooled units will periodically circulate water through the condensers and waterside economizer if the user has enabled the purge function at the HI The water purge function circulates water to introduce fresh water treatment chemicals and help prevent water stagnation The number of hours be tween each periodic purge or purge duration is user defined at the HI between 1 999 hours If the periodic purge timer expires while the unit is in occupied mode it will wait for the next available unoccupied time before initiating water purge Contrary if a request for cooling occurs during a purge sequence purge will terminate and cooling will commence Compressor Circuit Breakers The compressors are protected by circuit breakers that interrupt the compressor power supply if the current exceeds the breakers must trip value During a request for compressor operation if the compressor module MCM or SCM detects a problem outside of it s normal parameters it tur
221. ts 2 Level the unit by adjusting the isolator heights Unit weight may cause the Top View Upper Housing Side View gt 1 4 1 2 Clearance Lower Housing upper housing of the spring isolators to rest on the lower housing Maintain clearances between 1 4 to 1 2 To increase the clearance lift the unit off the isolator and turn the leveling bolt counterclockwise Verify that the unit is level and the housing clearances are correct The maximum allowable difference between isolator heights is 14 Shim as required under the isolators Note The unit is equipped with a posi tively sloped drain pan to help indoor air quality and does not require one corner of the unit to be pitched l 23 4 1 2 Dia Positioning Pin Leveling Bolt Unloaded Height Neoprene Pad Figure I PR 3 Optional spring flex vibration isolator type CP 1 for unit isolation SCXG SVX01B EN e TRANE Pre Startup Installation Requirements Plenum Treat field cut holes to prevent fiberglass Before installing the plenum attach the from entering the airstream insulation strip that ships with the plenum See Figure I PR 4 for proper insulation location Align the plenum front with the control panel side of the unit Using the strips and screws provided secure the plenum to the unit A CAUTION Do not remove more than two nonadjacent panels at one time Failure to do so will cause the plenum frame to collapse
222. ture is being used for Preheat Function issue a Disable request to Preheat Function f Reset An automatic reset occurs after the Mixed AirTemp input returns to within range continuously for 10 seconds Water Flow Fail a Data used module packet byte bit WSM 01 19 05 b Activation Conditions The water flow input is detected open 1 at the end of precool water flow initiation state or 2 continuously for five minutes while water side economizer is open 100 presetting of a Head Pressure Valve or demand for mechanical cooling Unit must be a configured with water cooled condenser and or water economizer and b have water flow switch installed c Time to React immediate e Actions to be Initiated A Lockout All Ckts request is issued to the Compressor Staging Function f Reset An automatic reset occurs after the Water Flow input returns to within range continuously for 3 seconds the water pump is requested OFF or the water flow switch becomes not installed Z Zone Cool Setpoint Failure Problem The occupied zone cooling setpoint is out of range Reason for Diagnostic The input designated as occupied zone cooling setpoint source is out of range temp 45 F or temp 94 F UCM s Reaction The active occupied zone cooling setpoint reverts to the default occupied zone cooling setpoint Reset Required PAR an automatic reset occurs after the designated occupied z
223. ture reset signal Morning warmup sensor temperature Entering air temperature Analog inputs Cooling and heating setpoints e VAV discharge air temperature setpoints Supply air pressure setpoint Cooling and heating enable disable Air economizer enable disable Airside economizer minimum position Unit priority shutdown 77 e TRANE Unit Control Components The Modular Series IntelliPak self contained unit is controlled by a microelectronic control system that consists of a network of modules These modules are referred to as unit control modules UCM In this manual the acronym UCM refers to the entire control system network These modules perform specific unit functions using proportional integral control algorithms They are mounted in the unit control panel and are factory wired to their respective internal compo nents Each module receives and interprets information from other unit modules sensors remote panels and customer binary contacts to satisfy the applicable request i e economizing mechanical cooling heating ventilation Following is a detailed description of each modules function RTM Module Board Standard on all Units The RTM responds to cooling heating and ventilation requests by energizing the proper unit components based on information received from other unit modules sensors remote panels and customer supplied binary inputs It initiates supply fan exhaust fan
224. ture setpoint Using a field installed CO sensor with CO reset enabled as the CO concentra tion increases above the CO reset start value the VCM modifies the minimum outside air CFM setpoint to increase the amount of fresh air entering the unit The setpoint adjusts upward until reaching the CO maximum reset value The maxi mum effective reset setpoint value for fresh air is limited to the system s operating CFM As the CO concentration decreases the effective reset setpoint value adjusts downward toward the minimum outside air CFM setpoint See Figure O GI 6 on page 88 for an airflow cfm vs CO concentration curve 87 e TRANE Standard Two Position Damper Interface Units with the two position damper interface are provided with a 0 10 VDC control output suitable for controlling a field provided modulating actuator In occupied mode the output drives to the maximum position Airside Economizer Interface Units with airside economizer interface are equipped with the necessary control sequences to allow using outside air for the first stage of cooling in occupied or unoccupied mode and when ambient conditions are favorable for economizing Inherent in the unit controller is the ability to suppress the setpoint below the normal unit setpoint This allows the building to improve comfort levels when possible and at the same time optimize building mechanical cooling operation for peak operating efficiency An outsid
225. ty Flow Ring Tube From Low Side of Velocity Flow Ring Figure 2 Velocity Pressure Trans ducer Solenoid Assembly 81 e TRANE Generic Building Automation System Module Option The generic building automation system module GBAS provides broad control capabilities for building automation systems other than Trane s Tracer system A field provided potentiometer or a 0 5 vdc signal can be applied to any of the inputs of the GBAS to provide the following points GBAS Analog Inputs Four analog inputs that can be configured to be any of the following 1 Occupied zone cooling 2 Unoccupied zone cooling 3 Occupied zone heating 4 Unoccupied zone heating 5 SA cooling setpoint 6 SA heating setpoint 7 Space static pressure setpoint 8 SA static pressure setpoint GBAS Binary Outputs Five binary outputs to provide diagnostics signaling up to five alarms Each of the five 5 relay outputs can be mapped to any all of the available diagnostics Each output contains a dry N O and N C contact with aVA rating of 2 amps at 24 VAC GBAS Binary Input One binary input for the self contained unit to utilize the demand limit function This function is operational on units with a GBAS and is used to reduce electrical consumption at peak load times Demand limiting can be set at either 50 or 100 When demand limiting is needed mechanical cooling and heating with field provided 2 stage electric heat only opera
226. unit during storage and transportation Remove the skids before placing the unit in its permanent location Remove the skids using a forklift or jack Lift one end of the unit off of the skids See Figure l PC 5 and I PC 6 on page 12 for unit gravity block location Slide the skids out and lower the unit at the installation location Note External isolation is not necessary since units are internally isolated Consult a vibration specialist before double isolating the unit External Unit Isolation If your job requires external vibration isolation two options are available isopads or spring type isolators Isopads should be placed under the unit at locations indicated on the factory provided isolator sheet Set the spring type isolators Figure I PC 9 in position after the unit is removed from skids before making electrical piping or duct connections All units require a minimum of four isolators per unit But some may require six isolators depending upon unit options Note The Trane Company strongly recommends you consult a vibration specialist before double isolating the unit Double isolation is not recommended If you decide to externally isolate the unit use spring flex type CP isolators The spring number is marked on the outer housing See Figure I PC 9 To install external isolators complete the following procedure 1 Locate the isolators under unit base at the locations indicated on the factory
227. unit to dry completely before putting it back into service 8 Ensure that contaminated material does not contact other areas of the unit or building Properly dispose of all contaminated materials and cleaning solution Determine the cause of any microbial growth mold and take action to ensure it does not reoccur SCXG SVX01B EN Owner e TRANE Supply Fan Fan Drive Perform the following procedures according to the Periodic Maintenance Check List on page 110 Disconnect electrical power source to prevent injury or death from electrical shock 1 Rotate the fan wheel to be sure it turns freely in the proper direction and is not rubbing on the fan housing inlet or inlet guide vanes If necessary center the fan wheel again 2 Check the position of both shafts Fan and motor shafts should operate parallel to each other for maximum belt and bearing life Shim as necessary under the motor or fan bearings to obtain proper alignment 3 Check the fan motor sheave alignment with straight edge or a tightly pulled string For sheaves of different widths place a string in the center groove of each sheave and pull it tight for a center line See Figure O M 2 on page 100 for recommended torques 4 Once the sheaves are properly aligned tighten sheave set screws to proper torque 5 Check belt tension Refer to the Measuring BeltTension section on page 100 6 If required adjust belt to the minimum r
228. vided to allow monitoring of reference enthalpy and are field installed If the unit has the ECEM board econo mizer operation enables when the outside air enthalpy is less than 25 BTU s Ib default adjustable 19 28 BTU S Ib During occupied mode the outside air damper opens to 15 adjustable 0 100 at the HI for ventilation purposes Also the ability to alter the outside air damper position to compensate for VAV supply air modulation is inherent in the unit controls and can be enabled by the operator If the unit does not have an ECEM board it will economize when the O A tempera ture falls below the O A economizer setpoint The mixing box fabrication is 16 gauge galvanized steel Opposed low leak damper blades are fabricated from 16 gauge galvanized steel and rotate on rustproof nylon bushings A factory installed 24V modulating spring return actuator controls both damper positions When outdoor conditions are not suitable for economizer cooling the enthalpy control disables the economizer function SCXG SVX01B EN Owner e TRANE and permits the outdoor air damper to open only to the minimum position On water cooled units compressor operation lockout will not occur at low ambient air temperatures However lockout will still occur via low condenser water temperature The outdoor air dampers drive fully closed whenever the supply air fan is off provided there is power to the unit Comparative En
229. voltage If the setpoint range is between 50 90 F IPV SP 50 0 1 0 5 SP IPV 0 5 0 1 50 If the setpoint range is between 40 90 F IPV SP 40 0 8 0 5 SP IPV 0 5 0 08 40 If the setpoint range is between 40 180 F IPV SP 40 0 029 0 5 SP IPV 0 5 0 029 40 If the static pressure range is between 0 03 0 3 iwc IPV SP 0 03 14 8 0 5 SP IPV 0 5 14 8 0 03 If the static pressure range is between 0 0 5 0 SP 0 8 0 5 SP IPV 0 8 0 5 GBAS Demand Limit Relay Binary Input The GBAS allows the unit to utilize the demand limit function by using a normally open N O switch to limit the electrical power usage during peak periods Demand limit can initiate by a toggle switch closure a time clock or an ICS control output These contacts must be rated for 12 ma 24 VDC minimum When the GBAS module receives a binary input signal indicating demand limiting is required a command initiates to either partially 50 or fully 100 inhibit compressor and heater operation This can be set at the HI using the setup menu under the demand limit definition cooling and demand limit definition heating screens A toggle switch time clock or building automation system control output can initiate demand limiting If the cooling demand limit is set to 50 half of the cooling capacity disables when the demand limit binar
230. wo 2 screws located on the right hand side of the key pad e Carefully slide the key pad plate upward from the bottom releasing the extruded hinge pin from its socket at the top f Set the microprocessor aside until mounting is complete 3 Remove the junction box knockout in the back of the enclosure SCXG SVX01B EN Installation e TRANE Note The top of the enclosure is marked TOP 4 With the enclosure in the correct position align the mounting holes around the knockout in the enclosure with the screw holes in the electrical handy box and secure with the appropriate screws 5 Replace the microprocessor within the enclosure as follows a Verify that the terminal block jumpers are connected properly b Slide the extruded hinge pin at the top left of the key pad plate into the hole located at the top left hand side of the enclosure c Slide the bottom of the plate into place aligning the two 2 clearance holes with the screw holes on the right Install the screws but do not tighten at this time Note If the two screws are not installed as called out in the previous step hold against the key pad plate while installing the door in the next step to prevent it from faling out d Slide the extruded hinge pin at the top left of the door into the hole located under the bottom left side of the display e Install and tighten the hinge screw located at the bottom left side of the enclosure
231. y programming Each day can be programmed with different times temperatures and occupied status Each day can be programmed with up to four periods Although four periods are available each day you can program just one of the four e Each period be programmed for occupied or unoccupied To begin programming follow these steps Determine which periods during the day will be occupied and unoccupied Write your daily schedule on the sheet enclosed with the zone sensor Enter your program by following the steps below To program time periods and setpoints for a day Press the program button to enter program mode Press the day button to select first day to be programmed To set the begin time for the first period of the day press the minus or plus keys To set the temperature setpoint for that period use f or 4 Press the program button to move to the next period for that day To program time periods and setpoints for the next day press the day button e When finished press and hold the program button for two seconds to return to the normal run mode SCXG SVX01B EN Note Blank temperature settings may be entered at any of the four daily periods When a setpoint is left blank and in occupied condition the ZSM will default to the last occupied setpoint When a setpoint is left blank and in an unoccupied condition the ZSM will default to the last unoccupied setpoint
232. y input closes The heating demand limit definition can only be set at 100 unless the unit has field provided two stage electric heat In that case if the heating demand limit is set to 50 half or one stage of heating disables when the demand limit binary input closes If the demand limit definition is set to 100 all cooling and or heating will disable when the demand limit input closes GBAS Diagnostics Binary Outputs The GBAS can signal up to five alarm diagnostics which are fully mappable using the setup menu on the HI These diagnostics along with the alarm output on the RTM allow up to six fully mappable alarm outputs Each binary output has a NO and NC contact with a rating of 2 amps at 24VAC The five binary outputs are factory preset as shown on the unit wiring diagram on the unit control panel door However these outputs can be field defined in a variety of configurations assigning single or multiple diagnostics to any output For a complete listing of possible diagnos tics see the ntelliPak Self Contained Programming Guide PKG SVPO1B EN For terminal strip locations refer to the unit wiring diagram for the GBAS SCXG SVX01B EN SCXG SVX01B EN e TRANE Owner Table 6 GBAS Analog Input Setpoints Control Parameter Signal Range Setpoint Range Occupied Zone Cooling Setpoint 0 5 to 4 5 vde 50 to 90 F CV units only Unoccupied Zone Cooling Setpoint 0 5 to

Trane IntelliPak Modular Series User's Manual

Contents

Download Pdf Manuals

Related Search

Related Contents