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Trane RT-SVX10C-EN User's Manual

1. 1 I 09 2 5 o 06 8 0 5 g lt 5 04 E 0 3 gx o lt y lt gt 5 J a dS E ry lt t 6 0 1 4000 6000 8000 10000 20000 40000 60000 Unit Airflow Dry Airside Pressure Drop at 0 075 Ib cu ft 20 through 105 Ton Hi Cap Evaporator Coil Hi Cap Not Available on 115 amp 130 Ton Units Dry Airside Pressure Drop at 0 075 Ib cu ft 20 105 Ton Hi Cap Evaporator Coil Hi Cap Not Available on 115 amp 130 Ton Units 08 t 5 07 lt 06 9 0 5 e 0 4 PC a 03 As rd p e o ANN lt 02 T NS 0 1 4000 6000 8000 10000 20000 40000 Unit Airflow 72 4 4 20 amp 25 Supply Fan Performance with Inlet Guide 1700 RPM 5 20 amp
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3. 3 Wire Power Supply Ground 3 Wire Power Supply EN Ground CONDENSER SECTION CONNECT STEAM OR CIRCUIT 2 CIRCUIT 1 HOt NETER TEM AS ELECTRIC HEAT 200V 230V 60 HZ MAIN UNIT CONTROL SHOWN WHEN REQUIRED UNITS ONLY 4015 5 a m HYDRONIC HEAT 117 118 119 1 2 s 37M ACTUATOR 36AL 1781 OR 4 2 4515 1514 pi pnie VES 2 BLK 777 SPLICE SPLICE 483A A 13 Ai o ES LINE VOLTAGE LINE VOLTAGE 39 Figure 3 14 Continued Typical Field Power Wiring 90 thru 130 Ton Field Supplied Disconnect Switch Required unless optional factory mounted disconnect switch is ordered Heot Section 9 2 3 118i oR 154 uod i 777 ae y pem 3 kh e hk T LINE VOLTAGE Moin Control Ponel CONDENSER SECTION Table 3 6 Customer Connection Wire Range 11 H 1TB1 Pitch Pocket De lor 45 ay 1TB14 0000 J 3 conductor power supply plus ground wire Electri
4. 50 55 60 65 70 75 80 85 90 95 100 Suction Pressure PSIG 70 Ton Standard Operating Pressure Curve All Compressors and Condenser Fans ckt 70 Ton Standard Operating Pressure Curve All Compressors and Condenser Fans per ckt Cooling Cycle Pressure Curve Based on Indoor Airfow of 400 CFM Ton Full Load 360 340 105 F OD Ambient 320 I 95 F OD Ambien 9 300 1 5 5 280 8 85 F OD Ambien L 71 260 ae 5 3 75 F OD Ambien 2 7 240 L 220 4 65 F OD Ambien 50 55 60 65 70 75 80 85 90 95 100 Suction Pressure PSIG 89 Table 4 6 Continued 75 Ton Standard Operating Pressure Curve All Compressors and Condenser Fans per ckt On 75 Ton Std Operating Pressure Curve All Compressors and Condenser Fans ckt Cooling Cycle Pressure Curve Based on Indoor Airfow of 400 CFM Ton Full Load 380 360 340 105 F OD Ambient 320 L 95 F OD Ambient 300 a g 280 85 F OD Ambient a 260 5 9 75 Ambient Q 240 220 __ 65 F OD Ambient
5. General Unit Requirements Main Electrical Power Requirements Field Installed Control Wiring Requirements for Electric Heat Units Requirements for Gas Requirements for Hot Water Heat SLH Requirements for Steam Heat SSH O A Pressure Sensor and Tubing Installation Condensate Drain Connection Shipping Fasteners eene O A Sensor 8 Tubing Installation Units with Statitrac M Gas Heat Units _ Connecting the Gas Supply Line to the Furnace Gas oe acere e eit exe noe Flue Assembly Installation Hot Water Heat Units SLH_ Steam Heat Units _ Disconnect Switch External Handle Electric Heat Units _ Main Unit Power Wiring 2 1 1 111 Disconnect Switch Sizing 055 Field Inst
6. 1 1 l 1 1V3H SV9 6 1 1 1 1 1 1 I I 1 1 1 1 OA 2 6 1 1 1 I I 1 1 1 05 35 30165100 IVNOILdO 195 c lt 512 1 02 8 3OINN3AO NOILV ILLN3A Tes o gt I T lt I cg ee tid B L OVA rZ wool Q3Ig 232oN n I 799191520 Srv ON osr lt 22 1 1 OVA v2 vv WO2 indin wayay 1 1 I I 92v 1 57 1 1 L 4H Hr 4 8vv ON S12V1NOO 3QIMH3A0 NOILV IILN3 SLOVLNOD 2 300W tes NOLLVALLIN3A ces L 1 687 ae Er pron p I gt SLOIVLNOD V 340 1 3014 43 0 NOILVTILN3A LINI1 GNYW3G O66 68S LS uo 01 49JoH suondo AD oer 02 10 BuurM ndino 891 2 aunbig 50 Field Connection Diagram Notes 20 through 130 Applications NOTES 1 ALL WIRING AND COMPONENTS SHOWN DASHED BE SUPPLIED AND INSTALLED
7. 96 See Figure 4 8 Gale type valve on ens 36 37 See Figure 3 12 Figure 3 13 GBAS Analog Input Wiring Diagram 54 See Figure 3 18 GBAS Voltage vs Setpoint GBAS Voltage vs 54 See Figure 3 18 Generic Building Automation System 48 Generic Building Automation System Module 8 Grease 103 See Table 5 6 H Head Pressure Control esses 9 Heat Exchanger au ge deett 98 See Limited Modulating Gas Furnace Modulating Gas Furnace Heat Module 5 necne in eee cte e dde does 7 heating coil falls to 40 22 1 10 High Duct Temp Thermostats 3S16 3517 10 high duct thermostat can be 10 High Pressure Controls 2 9 High Fire 95 See Two Stage Gas Furnace Honeywell Ignition System 56 See Two Stage Gas Furnace Hot Water Piping 1 rere enden dee 36 See Figure 3 12 Human Interface Module 7 See also appropriate SAHF PTG manual Interprocessor Communications 7 L Lead
8. 58 Wet Heat Coil Fin Data 1 2 102 See Table 5 5 2 Zone Temperature 10 Zone Temperature Heating 10 113 WARRANTY AND LIABILITY CLAUSE COMMERCIAL EQUIPMENT RATED 20 TONS AND LARGER AND RELATED ACCESSORIES PRODUCTS COVERED This warranty is extended by American Standard Inc and applies only to commercial equipment rated 20 Tons and larger and related accesso ries The Company warrants for a period of 12 months from ini tial start up or 18 months from date of shipment whichever is less that the Company products covered by this order 1 are free from defects in material and workmanship and 2 have the capacities and ratings set forth in the Company s catalogs and bulletins provided that no war ranty is made against corrosion erosion or deterioration The Company s obligations and liabilities under this war ranty are limited to furnishing f o b factory or warehouse at Company designated shipping point freight allowed to Buyer s city or port of export for shipment outside the con terminous United States replacement equipment or at the option of the Company parts therefore for all Company products not conforming to this warranty and which have been returned to the manufacturer The Company shall not be obligated to pay for the cost of lost refrigerant No liabil ity whateve
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10. 10 31 See Figure 3 9 Status Annunciator Output eee 9 Steam or Hot Water Coils 36 37 109 See Coil Cleaning Figure 3 12 Figure 3 13 Wet Heat Suction Line Filter Drier Installation 105 See Figure 5 2 suction pressure approaches 7 4 psig 9 suction pressure exceeds 22 4 psig 9 supply air temperature falls 10 F below 10 Supply Air Temperature Low 10 supply air temperature reaches 10 F above 10 supply air temperature reaches 240 F 10 Supply Air Temperature Sensor SRT9 8 Supply Air Tempering 10 Supply and Exhaust Airflow Proving Switch 8 Supply and Exhaust Fan Circuit Breakers 9 Supply and Exhaust Fan Shipping Channels 30 See Figure 3 8 Supply and Exhaust Fan VFD Programming Parameters ip aae Ree 106 See Table 5 8 Supply Duct Static Pressure Control 11 swing check vacuum breaker 37 See Figure 3 13 T temporary low limit suppression setting 9 Thermostatic Expansion Valves
11. 7 discharge pressure approaches 405 7 psig 9 discharge pressure decreases to approximately 300 9 Dry Airside Pressure 70 7 See Figure 4 3 Standard amp HI Cap DSP control devices 31 See Figure 3 9 Units with Statitrac E efficiency check point setting 9 Electric Heatin 58 electric heat units operating on 200 230 volts 39 See Figure 3 14 Electrical Service Sizing Data 41 See Table 3 7 Electrical Service Sizing Equations 43 See Figure 3 15 Emergency Stop Switch 5571 48 Evaporator Temperature Sensor 8 Exhaust Air Dampers 80 Exhaust Airflow 66 Exhaust Fan Performancoee 77 79 See Table 4 3 Table 4 4 Exhaust Comparative Enthalpy Module 74 External Auto Stop Switch 5567 49 53 See Figure 3 16 Figure 3 17 F F A Damper Travel Adjustment 82 See Table 4 5 factory mounted disconnect switch
12. ndul INIOdLAS AD AWA d L uc 1uiodiegs sa Svga5 suondo AVA 8 AD 081 02 10 webera IeSId L 81 5 eJnBi4 54 Section One About The Literature Change Overview of Manual 2 Section Two General Information Model Number Description Hazard Identification 2 221211 Commonly Used Acronyms Unit Description nen inenen aasian Input Devices amp System Functions Constant Volume amp Variable Air Volume Units Constant Volume CV Units Variable Air Volume Units Space Temperature Averaging Unit Control Modules UCM Section Three Installation unap a i REA Unit riti SIOrage u hig ect eer ERI EPIS Unit Clearances esee Unit Dimensions amp Weight Information Roof Curb and Ductwork Pitch Pocket Location Unit Rigging amp
13. 38 Fan Belt 104 Fan Performance with Inlet Guide Vanes 73 75 See Figure 4 4 Fan Performance without Inlet Guide MEIN RE 67 69 See Figure 4 2 Fan Rotatlon uie teen hee ela 63 fans are rotating backwards 63 Fenwal Ignition System 2 8864 56 See Two Stage Gas Furnace Field Connection Diagram Notes 49 53 See Figure 3 16 Figure 3 17 Filter Data dieere eene 102 See Table 5 4 Filter Switch Filters See Filter Data Table 5 4 Filter Switch Flame Fail re 1 1 2 96 97 Modulating Gas Float and Thermostatic FT type trap 37 See Figure 3 13 Flue Assembly 4 444 400 34 111 See Figure 3 11 Flue Gas Carbon Dioxide amp Oxygen Measurements 96 See Figure 4 7 Freeze Protection 58 5 ih ederet VP 10 Fresh Air amp Return Air Damper 80 81 See Figure 4 5 Table 4 5 Frostat Control Lee RU 55 Fuse replacement data 101 G Gas Tr ilis tee nie ole niacin 33 See 235 and 350 MBH 500 and 850 MBH 1000 MBH and Modulating Gas Valve Adjustment Screw Locations
14. Space Temperature Averaging Unit Control Modules UCM Section Three Installatiori ec Unit Inspection 44 2242221 SIOL8g6 oed slice k Unit Clearances sese Unit Dimensions amp Weight Information Roof Curb and Ductwork Pitch Pocket Location Unit Rigging amp General Unit Requirements Main Electrical Power Requirements Field Installed Control Wiring Requirements for Electric Heat Units Requirements for Gas Requirements for Hot Water Heat SLH Requirements for Steam Heat SSH O A Pressure Sensor and Tubing Installation Condensate Drain Connection Shipping Fasteners 2 O A Sensor amp Tubing Installation Units with StatitracTM aaa 1 Gas Heat Units _ Connecting the Gas Supply
15. 50 55 60 65 70 75 80 85 90 95 100 Suction Pressure PSIG 75 Ton Hi Cap Operating Pressure Curve All Compressors and Condenser Fans per ckt On 75 Hi Cap Operating Pressure Curve All Compressors and Condenser Fans ckt On Cooling Cycle Pressure Curve Based on Indoor Airfow of 400 CFM Full Load 380 360 105 F OD Ambient 340 320 L 95 F OD Ambien 300 L 85 F OD Ambien 280 260 75 F OD Ambien Discharge Pressure PSIG 240 220 200 180 50 55 60 65 70 75 80 85 90 95 100 Suction Pressure PSIG 90 Table 4 6 Continued 90 Ton Operating Pressure Curve All Compressors and Condenser Fans ckt COOLING CYCLE PRESSURE CURVE Based on Indoor Airflow of 400 CFM Ton FULL LOAD 380 360 340 105 F OD Ambient 0 320 oc 95 F OD Ambient 300 amp 280 85 OD Ambient 260 lt 75 Ambient 5 240 220 65 Ambient 200 180 50 55 60 65 70 75 80 85 90 95 100 SUCTION PRESSURE PSIG To Check Operating Pressures 1 Start the unit and allow the pressures to stabilize 2 Measure the outdoor air dry bulb temperature F entering the condenser coi
16. A 115 amp 130 TON Compressor 1A 4 Compressor 2D HI Designator K3 Compressor 2C Compressor 2B HI Designator K4 c 5 Ne Sc 22 s OF Compressor 2A I Compressor 1 HI Designator K11 i Compressor 1C Compressor 1B HI Designator K12 Compressor 1A ACADNS_HFNCOMP Table 4 6 20 Operating Pressure Compressors Fans COOLING PRESSURE Based Indoor Airflow of 400 FULL LOAD 360 340 105 F OD Ambient 320 o 0 300 95 F OD Ambient 34 oc 280 85 F OD Ambient 260 5 240 75 OD Ambient lt 5 220 2 65 F OD Ambient 200 180 160 50 55 60 65 70 75 80 85 90 95 100 SUCTION PRESSURE PSIG To Check Operating Pressures 1 2 3 25 Start the unit and allow the pressures to stabilize 4 Plot the outdoor dry bulb temperature and the Measure the outdoor air dry bulb temperature F operating suction pressure psig onto the chart entering the condenser coil 5 At the point of intersection read to the left for the Measure the discharge and suction
17. Closed Closed Closed 0 Default 2A Off 2B Off 1B 2B2 2B3 Off Off 1A OffAB On Off Off Off Orff Off Off Off Closed Closed Closed 0 Default 2A Off 2B Off 2A 2B4 Off Off 1A Off 1B Off Off Off Off Off Off Closed Closed Closed 0 Default 2A On 2B Off 2B 2B5 2B6 Off Off 1A OffAB Off Off Off Off Off Off Off Closed Closed Closed 0 Default 2A Off 2B On Refer to the next page for applicable notes 61 Table 4 1 Continued Service Test Guide for Component Operation COMPONENT COMPONENT CONFIGURATION Occ BEING TESTED Supply Exhaust Condenser Econo Exhaust VFD CONDENSER FANS 90 Ton 1A 2B3 2B14 1A On 1B Off K3 Off K12 On 4 Closed Closed 0 Default 2A Off 2B Off 1B 2B1 2B2 1A Off 1B On K3 Off K12 Off K4 Off Closed Closed 0 Default 2A Off 2B Off 2A 2B6 2B13 1A Off 1 B Off K3 Off K12 Off KA On Closed Closed 0 Default 2A On 2B Off 2B 2B4 2B5 1A Off 1 B Off K3 On K12 Off K4 Off Closed Closed 0 Default 2A Off 2B On 105 115 1 2 3 2 14 1 1 K3 Off K12 On 4 Closed Closed 0 Default 2 2 1 2 1 2 2 2 19 1A Off 1B On K3 Off K12 Off KA Off Closed Closed 0 Default 2 2 2 2 6 2 13 1A Off 1 B Off K3 Off K12 Off KA On Closed Closed 0 Default 2A On 2B Off 2B 2B4 2B5 2B15 1A Off 1 B Off K3 On K12 Off K4 Off
18. 42 Figure 3 15 Power Wire Sizing and Protection Device Equations To correctly size the main power wiring for the unit use the appropriate calculation s listed below Read the load definitions that follow and use Calculation 1 for determining the MCA Minimum Circuit Ampacity MOP Maximum Over current Pro tection and RDE Recommended Dual Element fuse size for SAH_ Cooling Only units SXH_ Extended Casing units SSH Cooling with Wet Heat units and SFH_ Cooling with Gas Heat units Use Calculation 2 for Cool ing with electric Heat units Load Definitions LOAD 1 CURRENT OF THE LARGEST MOTOR COMPRESSOR OR FAN MOTOR LOAD 2 SUM OF THE CURRENTS OF ALL REMAINING MOTORS LOAD 3 CURRENT OF ELECTRIC HEATERS LOAD 4 ANY OTHER LOAD RATED AT 1 AMP OR MORE CONTROL POWER TRANSFORMER FOR ALL MODES 20 40 Ton Units add 3 FL Amps 50 75 Ton Units add 6 FL Amps 90 130 Ton Units Add 8 FL Amps CRANKCASE HEATERS FOR HEATING MODE 460 575V ONLY 20 30 Ton Units Add 1 Amp 40 60 Ton Units Add 2 Amps 70 105 Ton Units Add 3 Amps 115 130 Ton Units Add 4 Amps Calculation 1 SAH_ SXH_ SLH_ SSH_ and SFH_ Units MCA 1 25 x LOAD 1 LOAD 2 LOAD 4 MOP 2 25 x LOAD 1 LOAD 2 LOAD 4 Select a fuse rating equal to the MOP value If the MOP value does not equal a standard fuse size as listed in NEC 240 6 select the next lower standard fuse rating Note If sele
19. OOO Outside Air Static Pressure Kit Snap Bushings Conduit Plugs Unit Literature 11 Space Temperature Averaging Space temperature averaging for Constant Volume applica tions is accomplished by wiring a number of remote sensors in a series parallel circuit The fewest number of sensors required to accomplish space temperature averaging is four Figure 8 illustrates a single sensor circuit Single Zone four sensors wired in a series parallel circuit Four Zone nine sensors wired in a series parallel circuit Nine Zone Any number squared is the number of remote sensors required Wiring termination will depend on the type of remote panel or control configuration for the system Refer to the wiring diagrams that shipped with the unit Unit Control Modules UCM Unit control modules are microelectronic circuit boards de signed to perform specific unit functions These modules through Proportional Integral control algorithms provide the best possible comfort level for the customer They are mounted in the control panel and are factory wired to their respective internal components They receive and interpret information from other unit modules sensors remote pan els and customer binary contacts to satisfy the applicable request for economizing mechanical cooling heating and ventilation Figure 9 below illustrates the typical location of each 1U designated module Control Mo
20. Removing Compressor Assembly Shipping Hardware 20 through 60 Ton Each manifolded compressor assembly is rigidly bolted to a mounting rail assembly The rail assembly sets on four 4 rubber isolators The assembly is held in place by two ship ping braces that secure each compressor rail assembly to Installation Continued the unit s base rail To locate and remove the shipping hard ware refer to Figure 3 7 and the following procedure 1 Remove the four anchor bolts 2 front and 2 rear used to secure the shipping brace to the unit s base rail two assemblies on 40 through 60 Ton units 2 Remove the three self tapping screws that secure each shipping brace to the compressor mounting rails 3 Remove and discard the two 30 1 2 long shipping braces for each assembly 4 Do not remove the shipping bracket located on top of the compressors 5 Ensure that the compressor rail assembly is free to move on the rubber isolators Removing Compressor Assembly Shipping Hardware 70 amp 105 Ton Each manifolded compressor assembly is rigidly bolted to a mounting rail assembly The rail assembly sets on six 6 rubber isolators The assembly is held in place by four 4 shipping Tiedown bolts To remove the shipping hardware follow the procedures below 1 At each Tiedown location 2 front and 2 rear remove and discard the tiedown bolt and the slotted shipping spacer located between the compressor rails and the unit b
21. Units Do Not Remove Compressor Plate Rubber Isolator 4 per Assembly Compressor Mounting Rails Belf Tapping Screws 3 per brace Shipping Brace Anchor Bolts Front and Rear 2 per brace Figure 3 7B Removing Scroll Compressor Shipping Hardware for 70 through 105 Ton Units AS _ 9Isolator Bolt Detail A S 4 per Assembly Washer Compressor Base e3 Rails Lower Isolator Body Unit Base Rail Tiedown Bolt Detail plotted Apacer A Washer Cap Screw Compressor Rail Slotted Spacer 7 2 Z Unit Weld Pd Figure 3 7 Removing Scroll Compressor Shipping Hardward for 115 and 130 Ton Units Isolator Bolt Detail 4 per Assembly Ew Washer Plat N ate Compressor Mounting 3 A Tiedown Bolt Detail Rails 2 Lower Isolator Washer pn Cap Screw Body __ Compressor Rail Unit Base Rail Slotted Weld Nutt Base Rail 28 Removing Supply and Exhaust Fan Shipping Channels Motors gt 5Hp Each supply fan assembly and exhaust fan assembly for S_HF units shipped with a motor larger than 5 HP is equipped with rubber isolators as standard or optional spring isolators Each supply fan assembly and exhaust fan assembly for
22. When a cooling request is sent to the RTM from the zone temperature sensor the RTM evaluates the operating con dition of the system using the supply air temperature input and the outdoor temperature input before sending the re quest to the SCM MCM for mechanical cooling If the out Unit Start Up door conditions are suitable for cooling temperature and humidity are within specified setpoints the RTM will at tempt to maintain the zone temperature without using any compressors If the zone temperature can not be main tained within the setpoint deadband the RTM sends a cool ing request to the SCM MCM The compressor module checks the compressor protection circuit before closing Stage 1 K10 on SCM or K11 on MCM After the first functional stage has started the compressor module moni tors the saturated refrigerant temperature and closes the condenser fan output contact 1A when the saturated re frigerant temperature rises above the lower limit setpoint Units with Traq Sensor The fresh air enters the unit through the Traq Sensor as sembly and is measured by velocity pressure flow rings The velocity pressure flow rings are connected to a pres sure transducer solenoid assembly The solenoid is used for calibration purposes to compensate 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 minim
23. 83 Trane Communications Interface Module 7 Trane OlE 42 5 enc tenet cet i ev eta et ra nhe 83 Transducer Voltage Output vs Pressure Input 10 TraqTM Sensor Airflow Measurement 66 Two Stage Gas Furnace 56 Typical Field Power Wiring 39 See Figure 3 14 Typical Field Wiring Diagram 49 53 See Figure 3 16 Figure 3 17 Typical Gas 99 See Figure 4 10 Typical Ventilation Override Binary Output WitiNg si ak ected glo ee a 50 53 See VOM Contacts Flgure 3 16 Figure 3 17 U unit and curb operating weights 22 See Table 3 3 Unit Internal Fuse Replacement Data amp VFD Factory Settings 101 See Table 5 3 units electric heat units operating on 460 575 vol 39 See Figure 3 14 units operating on 200 230 volts 38 units operating on 460 575 volts 38 Units with an Economizer 55 Units with TraqTM Sensor 55 Units without an 2 55 Unoccupied 11 unoccupied an occupied mode with
24. Requirements for Electric Heat Units Requirements for Gas Requirements for Hot Water Heat SLH Requirements for Steam Heat SSH O A Pressure Sensor and Tubing Installation Condensate Drain Connection Shipping Fasteners a u O A Sensor 8 Tubing Installation Units with StatitracTM 222222222 Gas Heat Units _ Connecting the Gas Supply Line to the Furnace Gas TRAIN eter eren dede Flue Assembly Installation Hot Water Heat Units SLH Steam Heat Units _ Disconnect Switch External Handle Electric Heat Units SEH_ Main Unit Power Wiring 2 Disconnect Switch Sizing DSS Field Installed Control Wiring Controls using 24 Controls using DC Analog Input Outputs Constant Volume System Controls Variable Air Volume System Controls Constan
25. SS S YAdWYA LSAVHXa EX DNILVINGOW 001 N NXdWVG LSnVHX3 ao 09 dO LSNAVHXA SNILVIQGON 001 5 V2 amp esq GZ nay oz SHUN 4HXS JHSS 4 16 dHdS 5 95 8 4 18 Installation Continued Table 3 2A Unit Dimensional Data Unit Dimensions Size A B E F G H J 20 amp 25 Ton 5 3 1 8 7 6 1 2 5 8 15 16 3 9 5 16 1 3 1 2 30 Ton 5 8 5 8 7 6 1 2 6 2 3 8 1 3 1 2 40 30 2 1 2 6 1 5 8 7 6 1 2 6 7 3 8 5 9 5 16 15 11 1 8 1 8 2 5 50 amp 55 Ton 6 9 5 16 15 11 1 8 1 8 2 5 60 Ton 6 1 5 8 9 8 6 7 3 8 5 95 16 1511 1 8 1 8 2 5 70 amp 75 Ton 30 2 1 2 6 15 8 9 8 6 7 3 8 5 95 16 15 111 8 1 8 1 4 Dimensions L M N 16 7 818 614 9 16 7 818 61 4 9 19 7 818 614 9 19 7 818 614 9 19 7 818 614 9 Note 19 6 for SFHF Low Heat units or 20 3 for High Heat units Table 3 2B Unit Base Dimensional Data Unit Dimensions Sze A C p E F 20 30 Ton 3 4 3 8 15 5 5 16 40 55 18 11 11 16 60 Ton 4 5 3 8 7 8 316 18 11 11 16 70 75 Ton 18 11 11 16 Unit Size J 20 30 16 9 3 4 9 1 16 40 55 Ton 9 1 16 60Ton 20 1 3 4 9 1 16 70 75 Ton 9 1 16 Note 1 5 5 15 16 for SEHF units or
26. The remote minimum position potentiometer is used on units with an economizer It allows the operator to remotely set the economizer s minimum position which controls the amount of outside air entering the unit Use the installation instructions that shipped with the potentiometer to install it and the appropriate illustrations in Figure 3 16 or 3 17 to connect it to the unit External Auto Stop Switch 5S67 A field supplied single pole single throw switch 5S67 may be used to shut down the unit operation This switch is a bi nary input wired to the RTM When opened the unit shuts down immediately and can be cancelled by closing the switch Refer to the appropriate illustrations in Figure 3 16 or 3 17 for the proper connection terminals in the unit control panel The switch must be rated for 12 ma 24 VDC minimum VOM Contacts 5K90 5K91 5K92 5K93 5K94 If the unit is equipped with a Ventilation Override Module i e unit model number digit 21 is a N a num ber of special functions can be specified by the building owner or contractor These functions can include but are not limited to 1 Unit Off 2 Pressurization 3 Exhaust 4 Purge and 5 Purge with Duct Pressure Control They are controlled by binary inputs wired to the VOM These functions can be initiated by a toggle switch a time clock or ICS output The switch must be rated for 12 ma 24 VDC minimum The following preset sequence
27. Use float and thermostatic traps in the system as re quired by the application O A Pressure Sensor and Tubing Installation All units with Statitrac O A pressure sensor mounted to the roof bracket Factory supplied pneumatic tubing installed between the O A pressure sensor and the connector on the vertical support Field supplied pneumatic tubing connected to the proper fitting on the space pressure transducer located in the filter section and the other end routed to a suitable sens ing location within the controlled space Stainless Steel Drain Pan Option 3 condensate drain openings both sides Standard Drain Pan 1 condensate drain opening both sides Note Stainless Steel Drain Pan Condensate Drain Connections When unit has optional stainless steel drain pan connect all 3 drains on each side of the unit total 6 to the trapped condensate drain Each drain pan connection must be trapped The drains may be trapped individually or connected and then trapped 26 Condensate Drain Connections Each S_HF unit is provided with two or six 1 evaporator condensate drain connections one on each side of the unit Each S_HG unit is provided with two or six 1 1 4 evaporator drain connections one on each side of the unit Due to the size of these units all condensate drain connec tion must be connected to the evaporator drain connec tions Refer to the appropriate illustration in Figure 3 2 for the
28. n Valve Onl 1288 x Valve 7 Agsembly Pilot Valve Bolenoid Valve UL only Pilot Pressure Motorized Pressure Valve CSA only Regulator e Manual Shutoff Valve Valve Pilot Valve 2 Bolenoid 1 1 4 Field Connection Elbow 33 Figure 3 10 Continued Unit Gas Trains Natural Gas 1000 MBH Manual Shutoff N Valve Orifice Pregsure N Z Plug 2 i mado Valve Shutoff Assembly Valve h Motorized Valve Manual Phutorf Pilot Pressure Pilot Valve Regulator Pilot Ol Shutoff Valve EN Mi Iw Sy Manual For odd Valve 1 1 4 Field Connection Elbow Modulating 500 MBH 1000 MBH Pilot Shutoff Valve Burner Nozzle WEF Pilot Solenoid Valve Pilot Regulator Valve _ Pilot Shutoff Valve Shutoff Valve Flue Assembly Installation 1 Locate the flue assembly and the extension refer to Fig ure 3 11 for extension usage in the shipwith section of the unit 2 Install the fl
29. 194 3 168 4 84 2 67 4 90 249 8 216 5 108 3 86 6 110 Kw 305 3 264 6 132 3 105 9 130 n a n a 156 4 125 1 150 Kw 180 4 144 3 170 204 5 163 6 190 228 5 182 8 Combustion FLA FLA FLA FLA Blower Motor SFHF Only 235 350 500 2 1 1 8 0 9 0 7 850 amp 1 000 2 8 2 4 1 2 1 Unit of Compressors Tonnage Type Designation 20 Ton Std and Hi Capacity Two 9 Ton Scrolls A amp B 25 Ton Std and Hi Capacity One 14 Ton Scroll B One 9 Scroll A 30 Ton Std Two 14 Scrolls A amp B 40 Std and Hi Capacity Four 9 Ton Scrolls 1A 1B 2A 2B 50 Ton Std and Hi Capacity Two 14 Ton Scrolls 18828 9 Scrolls 1 amp 55 Std and Hi Capacity Four 14 Ton Scrolls 1A 1B 2A 2B 60Ton Std and Hi Capacity Four 14 Ton Scrolls 1A 1B 2A 2B 70 75 Ton Std Four 9 Ton Scrolls 1A 1B 2A 2B Two 14 Ton Scrolls 1C amp 2C 75 Ton Hi Capacity Four 10 Ton Scrolls 1 amp 2A 1B amp 2B Two 15 Ton Scrolls 1C 2C 90 Ton Two 10 Ton Scrolls 1A amp 2A Four 15 Scrolls 1 2 1 2 105 15 Scrolls 1 2 1 2 1 2 115 Four 15 Scrolls 1 2 amp 1 2 Four 10 Scrolls 1 2 amp 1 20 130 Eight 14 Scrolls 1 2 1 28 1 2 1 20 Note 3 Fullload values shown for the electric heat were determined at 480 600 volts respectively
30. 610 feet 16 gauge 611 970 feet 14 gauge c Do not run the electrical wires transporting DC signals in or around conduit housing high voltage wires Units equipped with a Trane Communication Interface TCI or LonTalk Communication Interface LCI option which uti lizes a serial communication link a Must be 18 AWG shielded twisted pair cable Belden 8760 or equivalent b Must not exceed 5 000 feet maximum for each link c Must not pass between buildings Constant Volume System Controls Remote Panel w o NSB 5056 BAYSENS010B This electronic sensor features four system switch settings Heat Cool Auto and Off and two fan settings On and Auto with four system status LED s It is a manual or auto matic changeover control with dual setpoint capability It can be used with a remote zone sensor BAYSENSO 17B Refer to Table 3 10 for the Temperature vs Resistance coefficient Remote Panel w NSB 5058 BAYSENSO19 This 7 day programmable sensor features four periods for Occupied Unoccupied programming per day If the power is interrupted the program is retained 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 located on the front panel allows selection of four system modes Heat Cool Auto and Off two fan modes On and Auto It has dual temperature se lection with programmable start time capability 45 The occupied cooling setpo
31. 75 F OD Ambient 300 280 260 240 F OD Ambient DISCHARGE PRESSURE PSIG 220 200 180 50 55 60 65 70 75 80 85 90 95 100 SUCTION PRESSURE PSIG To Check Operating Pressures 1 Start the unit and allow the pressures to stabilize 4 Plot the outdoor dry bulb temperature and the 2 Measure the outdoor air dry bulb temperature F operating suction pressure psig onto the chart entering the condenser coil 5 At the point of intersection read to the left for the 3 Measure the discharge and suction pressure psig discharge pressure The measured discharge next to the compressor pressure should be within 7 psig of the graph 40 Ton Operating Pressure Curve All Compressors and Condenser Fans per ckt On COOLING CYCLE PRESSURE CURVE Based on Indoor Airflow of 400 CFM Ton FULL LOAD 380 360 340 105 OD Ambient 0 320 95 F OD Ambient 2 300 d amp 280 85 OD Ambient 260 lt 75 F OD Ambient 5 240 o a 220 65 F OD Ambient 200 180 50 55 60 65 70 75 80 85 90 95 100 SUCTION PRESSURE PSIG To Check Operating Pressures 1 Start the unit and allow the pressures to stabilize 4 Plot the outdoor dry bulb temperature and the 2 Measure the outdoor air
32. 99 Section Five Service amp 100 Fan Belt 24 2222 1 104 Scroll Compressor 105 VFD Programming Parameters 106 Monthly 2 02 107 alc E M 107 Cooling 107 Heating SSASOMN sa 108 Coil Clearing inerte rel eI 108 Final Process utin ipie de 109 e caede tens 111 114 Warranty ur aa au anten die ree re e 114 Unit Inspection As soon as the unit arrives at the job site Verify that the nameplate data matches the data on the sales order and bill of lading including electrical data Verify that the power supply complies with the unit name plate specifications Verify that the power supply complies with the electric heater specifications on the uit nameplate Visually inspect the exterior of the unit including the roof for signs of shipping damage Check for material shortages Refer to the Component Layout and Shipwith Location illustration If the job site inspection of the unit reveals damage or mate rial shortages file a claim with the carrier immediately Specify the type and extent of the damage on the bill of lading before signing Vi
33. The selected MOP value will be the larger of the cooling mode MOP value or the heating mode MOP value calculated above Select a fuse rating equal to the MOP value If the MOP value does not equal a standard fuse size as listed in NEC 240 6 select the next lower standard fuse rating Note If selected MOP is less than the MCA then select the lowest standard maximum fuse size which is equal to or larger than the MCA provided the selected fuse size does not exceed 800 amps Continued on the Next Page 43 Power Wire Sizing and Protection Device Equations Continued RDE 1 5 x LOAD 1 LOAD 2 LOAD 3 LOAD 4 The selected RDE value will be the larger of the cooling mode RDE value or the heating mode RDE value calculated above Select a fuse rating equal to the RDE value If the RDE value does not equal a standard fuse size as listed in NEC 240 6 select the next higher standard fuse rating Note If the selected RDE is greater than the selected MOP value then select the RDE value to equal the MOP value B Dual Source Power units 200V and 230V These units will have two circuit values shown on the nameplate The first circuit value will be the refrigeration cooling mode values calculated using calculation 1 above The second set of circuit values shown on the nameplate will be for the electric heating circuit as follows MCA 1 25 x LOAD 3 MOP 1 25 x LOAD 3 Select a fuse rating for the electric heating circuit that s
34. The temperature sensor signal is sent to the Heat module of the Intellipak Unit Control The control sig nal from the Heat Module is an inverse proportional 5 10V DC The higher the voltage signal the lower the call for heat The 5 10V DC signal controls the angular position of the combustion air damper through a direct coupled damper ac tuator motor The position of the air damper in turn controls the combustion air pressure that is sensed by the modulat ing gas valve The greater the combustion air pressure the greater the call for gas and the higher the firing rate of the heater As the temperature setpoint is reached the Modu lating Heat control will cause the combustion air actuator to change the damper position to a lower firing rate that matches the heat load of the space 1 Use Table 4 1 to program the following system compo nents for operation by scrolling through the Human Inter face displays Gas Heat Supply Fan On Inlet Guide Vanes 100 Open if applicable Variable Frequency Drive 100 Output if applicable RTM Occ Unocc Output Unoccupied High Fire 90 Turn the 115 volt control circuit switch 4S24 located in the heater control panel to the On position Open the manual gas valve located in the gas heat section 2 Once the configuration for the appropriate heating sys tem is complete press the NEXT key until the LCD dis plays the Start test __Sec screen Press the key to designa
35. the MWU 2 2 4 404050 10 V Variable Air Volume Systems 65 Changeover Contacts 46 Control Option u un l 49 53 See Figure 3 16 Figure 3 17 optional CO2 8 optional temperature sensor 8 Velocity Pressure Transducer Solenoid Assembly 8 Ventilation Control Module 8 Ventilation Override Module 7 Programming Parameters 106 See Table 5 8 Voltage 60 Voltage 60 VOM Contacts s uuu 47 See VOM Modes VOM Mode is 47 See Contacts VOM Mode n quit 47 See VOM Contacts VOM Mode isi u eie sui a 47 See VOM Contacts VOM Mode D ede ee 47 See VOM Contacts Mod ee deii ens 47 See VOM Contacts W WAar iBgS eic 6 Wet Airside Pressure Drop 70 72 See Figure 4 3 Wet Heat s ai ot c iiic ei elec pee 58 Wet heat actuator
36. 1 in the model number a damper is factory installed over the condenser fans 2B1 2B4 2B13 amp 2B14 depending on unit size Refer to the illustration in Figure 4 1 for the damper locations For field installation mount the dampers over the con denser fans at the locations shown in Figure 4 1 and con nect the actuator for each circuit Refer to the Installation Instructions provided with each kit Damper Adjustment Factory or Field Installed UCM has a factory default setpoint of 90 F This set point can be adjusted using the Human Interface program ming procedures Inspect the damper blades for proper alignment and opera tion Dampers should be in the closed position during the Off cycle If adjustment is required 1 At the Human Interface program the actuator for 096 on circuit 1 and or circuit 42 The output signal will go to 0 0 VDC Loosen the damper shaft Locking set screws on the ac tuator 3 Firmly hold the damper blades in the closed position 4 Retighten the Locking set screws To check damper operation program the actuator for 10096 on circuit 1 and or circuit 2 The output signal will go to 10 VDC and the damper will drive to the full open position Electric Steam and Hot Water Start Up Constant Volume amp Variable Air Volume Systems 1 Ensure that the System selection switch at the remote panel is in the Off position 2 Close the disconnect switch or circuit pro
37. 1 17 30 23 28 000 88 68 1 17 91 99 79 84 62 98 61 99 20 20 10 39 130 12 000 13 10 25 18 10 08 16 10 13 06 11 O05 05 01 44 37 02 07 16 000 20 16 39 29 18 14 29 17 21 11 419 07 07 02 63 58 05 10 60 20 000 29 23 55 42 27 21 44 24 31 16 27 10 10 2 03 84 82 10 16 24 000 39 31 74 57 40 30 62 33 42 22 39 11 11 04 1 06 1 08 16 23 28 000 50 39 95 73 48 33 85 44 55 32 50 17 17 06 30 30 30 000 56 44 1 06 82 62 38 98 51 63 37 57 20 20 07 34 34 12 000 20 16 10 08 16 10 13 06 11 05 05 01 44 137 02 07 16 000 32 26 18 14 29 17 21 11 19 07 07 02 63 58 05 10 20 000 46 37 N A 27 21 44 24 31 16 27 10 03 84 82 10 16 22 000 54 43 33 25 53 29 37 19 33 12 12 04 95 95 13 20 70 24 000 62 50 N A 40 30 62 33 42 22 39 14 14 04 1 06 1 08 16 23 26 000 70 56 47 32 73 39 49 27 45 16 16 05 1 17 1 23 23 26 28 000 79 64 54 33 85 44 55 32 50 17 417 06 1 22 1 29 130 130 31 000 93 75 40 40 1 04 49 61 39 55 21 21 07 137 36 33 000 1 03 83 N A 65 46 1 18 52 67 44 60 24 24 08 42 40 12 000 25 18 31 23 410 08 16 10 13 06 11 05 05 241 44 37 02 07 16 000 39 29 49 37 18 14 29 17 21 11 19 07 07 02 63 58 05 10 20 000 55 42 69 53 27 21 44 24 31 16 27 10 10 203 84 82 10 16 22 000 65 49 81 62 33 25 53 29 37 19 33 12 12 04 95 95 13 20 75 24 000 74 57 93 71 40 30 62 33 42 22 39 14 14 04 1 06 1 08 16 23 26 000 84 65 1 05
38. 1 24 1 28 14ton 70 1 2 14 ton 1 2 amp 1 28 9 ton 75 Std 1 2C 14 ton 1 248 1 28 9 ton 75 1 2C 15 ton Hi Cap 1 248 1 28 10 ton 90 1 2B amp 1 2C 15ton 1 2A 10 ton 105 1A1B amp 1C 15ton 2A2B amp 2C 115 1 2C amp 1 20 15 ton 1 2A amp 1 28 10 ton 130 1 2C 1 20 14 ton 1 2A amp 1 2B 200V Must Hold 51 76 51 76 51 76 51 76 76 76 51 76 51 76 51 76 51 76 76 51 76 Must Trip 58 7 87 4 58 7 87 4 58 7 87 4 58 7 87 4 87 4 87 4 58 7 87 4 58 7 87 4 58 7 87 4 58 7 87 4 87 4 58 7 87 4 230V Must Must Hold Trip 51 58 7 76 87 4 51 58 7 76 87 4 51 58 7 76 87 4 51 58 7 76 87 4 76 87 4 76 87 4 51 58 7 76 87 4 51 58 7 76 87 4 51 58 7 76 87 4 51 58 7 76 87 4 76 87 4 51 58 7 76 87 4 100 Must Hold 22 2 33 22 2 33 22 2 33 22 2 33 33 33 22 2 33 22 2 33 22 2 33 22 2 33 33 22 2 33 460V Must Trip 25 5 38 25 5 38 25 5 38 25 5 38 38 38 25 5 38 25 5 38 25 5 38 25 5 38 38 25 5 38 Must Hold 17 7 26 4 17 7 26 4 17 7 26 4 17 7 26 4 26 4 26 4 17 7 26 4 17 7 26 4 17 7 26 4 17 7 26 4 26 4 17 7 26 4 575V Must Trip 20 4 30 4 20 4 30 4 20 4 30 4 20 4 30 4 30 4 30 4 20 4 30 4 20 4 30 4 20 4 30 4 20 4 30 4 30 4 20 4 30 4 Service Maintenance Continued Table 5 3 Unit Internal Fuse Replacement Data amp VFD Factory Settings FUSE REPLACEMENT TABLE UNIT VOLTAGE TIME DELAY C
39. 3 I80 1 5 Tie Down Bolt Shipping Channel M X Tie Down Bolt Shipping Channel 180 1 Sensor amp Tubing Installation An Outside Air Pressure Sensor is shipped with all units de signed to operate on variable air volume applications or constant volume units with 100 modulating exhaust w Stratitrac On VAV systems a duct pressure transducer 3U60 and the outside air sensor is used to control the discharge duct static pressure to within a customer specified parameter On CV amp VAV units equipped with 100 modulating ex haust w Stratitrac a space pressure transducer 3U62 and the outside air sensor is used to control the exhaust fan and dampers to relieve static pressure to within a customer specified parameter within the controlled space Refer to Figure 3 9 and the following steps to install the sensor and the pneumatic tubing 1 Remove the O A pressure sensor kit located inside the filter section The kit contains the following items O A static pressure sensor with sensor mounting bracket 2 of 3 16 O D pneumatic tubing Mounting hardware 2 Using two 10 32 x 1 3 4 screws provided install the sensor s mounting bracket to the factory installed bracket near the filter section 3 Using the 10 32 x 1 2 screws provided install the O A static pressure sensor vertically to the sensor bracket 4 Remove the dust cap from the tubing connector located below the sensor i
40. 7 8 1 2 for SFHF SLHF SSHF SXHF units Dimensions Table 3 2C Electrical Entrance Data Unit Dimensions Size F G H J K L M N 20 25 amp 30 8 7 32 6 31 32 15 21 32 13 21 32 9 17 32 8 1 2 18 1 16 19 9 16 amp 75 Ton Table 3 2D CPVC Dimensional Data Unit Size Furnace Dimensions Note Unit Size Furnace Dimensions Note Size MBH Length Height Size MBH Length Height 20 amp 25Ton 235 195 5 32 9 5 32 50 75 Low 500 240 1 8 9 5 32 High 500 195 5 32 9 5 32 High 850 231 1 8 9 5 32 30 Ton Low 350 195 5 32 9 5 32 90 130 1000 267 3 16 10 11 32 High 500 195 5 32 9 5 32 Note length dimension is the exhaust 40 Ton Low 350 240 1 8 9 5 32 end of the unit The height dimension is High 850 231 1 8 9 5 32 from the bottom of the unit base rail Figure 3 2 5 Cooling amp Heating Units 90 through 130 Exhaust Air M Outdoor Air 6 9 3 8 1 3 8 Drain Hole Both Sides 2 6 7 3 6 6 1 1 1 4 Condensate Drain Both Sides 2 Furnace Drain Refer to Table 3 20 Lifting Lug 6 Points Legend 1 3 8 Drain Hole iw Both Sides A 1 1 8 Dia Hole for field installed DC wiring terminatin
41. 700 RPM icem PW c 1 5 4 _ 3HP 1 0 s 1 500 RPM xL c LL 90 ae 2 ee c 0 0 0 4000 20000 73 Figure 4 4 Continued 40 50 amp 55 Ton Supply Fan Performance with Inlet Guide Vanes 1 5 600 RPM 8 0 5 40 50 55 7 5 Dual 20 X 20 Fans 70 Entrance Losses 4200 RPM Nc he N Mee with Inlet Guide Vanes 6 5 M 5 without Evap Coil M ES SN 9 40HP without Filters 6 0 ES ET Se N 5 without Return Air Dampers g 1100 axe 30 50 60 without Exhaust 55 E AS Fan Curve Limits 8 5 0 S Sf x 70 Minimum Motor 7 5 NS sare Maximum Motor HP ag 1900 40 50 amp 55 30 p 40 ES 7 5 15HP 1141 EM 20 30 HP 1170 as Maximum CFM g 3 0 800 RPM C40 18 000 K C50 22 500 25 7 i C55 24 000 20 700 7 5HP ES Maximum Static Pressure in m LF x Leaving the Unit 4 0 w c 1 0 500 RPM PU dee 0 0 0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000 22000 24000 26000 28000 30000 CFM 60 70 amp 75 Ton Supply Fan Performance with Inlet Guide Vanes 8 0 1200 RPM ES 5 n S_HFC60 C70 C75 7 5 1100 RPM NS NE Dual 22 X22 Fans E i Entrance Losses 7 0 4 x 8 with Inlet Guide Vanes 6 5 Be gt 50 HP 22 Without Evap Coil 5 E without Filters 6
42. 8 25 15 EN Maximum RPM go 3 HP 5 HP 1100 m a 1200RPM 7 5 15 HP 1655 P 70 Maximum 3 0 1100 RPM dee TEN NE C20 9 000 ES lt C25 11 000 b 25 1000 iem Maximum Static Pressure 201 900 RPM eS PHP ec I gt 80 Leaving the Unit 4 0 w c 151 800 RPM sss be M NC A 9096 1 0 ONEN een 3 600 RPM 6 ees 0 5 500 RPM e e E 0 0 5 0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000 30 Ton Supply Fan Performance without Inlet Guide Vanes Ser S HFC30 7 5 Dual 18 X 18 Fans T Entrance Losses 7 0 5 without Inlet Guide 1 without 6 5 without Filters 6 0 1 1300 T without Return Air Dampers 1 es 7 25 without Exhaust 55 ren b Fan Curve Limits 2 100 EC 50 Minimum Motor HP 5 5 50 4 7 20 HP Pls Maximum Motor HP 20 ae Maximum RPM 1379 100 RPM Mus SS 15 Seis 13 500 2 4 0 ss E Maximum Static Pressure sel 1000 RPM D Leaving the Unit 4 0 w c a 1 004 gt 304 _ 10 lt 1 5 gt lt i mes a 25 gt sul ae 70 20 __ 700 gt 600 DNA a os 500 RPM 90 wocfm 0 5 pn
43. Compressor Operational Sounds 83 Thermostatic Expansion Valves 93 Charging by 2 93 Low Ambient 93 Electric Steam and Hot Water Start Up 94 Gas Furnace 94 Two Stage Gas 95 Full Modulating Gas Furnace 97 Limited Modulating Gas Furnace 98 Final Unit 99 Section Five Service amp 100 Fan Belt Adjustment 104 Scroll Compressor 105 VFD Programming Parameters 106 Monthly 107 Filters ime to aie nk 107 Cooling Season ln lu 107 Heating Season eden 108 Coil Cleaning ze eere 108 Final Process tete ala 109 Index sisa guau a ODE 111 Watranty si seat were ree Rh E debes 114 General Information Model Number Description All products are identified by a multiple character model number listed on the unit nameplate An explanation of the alphanumeric id
44. Compressors and Condenser Fans ckt COOLING CYCLE PRESSURE CURVE Based on Indoor Airflow of 400 CFM Ton FULL LOAD 380 360 105 F OD Ambient 340 o 0 320 95 OD Ambient 300 hi 280 85 F OD Ambient 260 _ 75 F OD Ambient 5 240 2 65 F OD Ambient 220 200 180 50 55 60 65 70 75 80 85 90 95 100 SUCTION PRESSURE PSIG To Check Operating Pressures 1 Start the unit and allow the pressures to stabilize 4 Plot the outdoor dry bulb temperature and the 2 Measure the outdoor air dry bulb temperature F operating suction pressure psig onto the chart entering the condenser coil 5 At the point of intersection read to the left for the 3 Measure the discharge and suction pressure psig discharge pressure The measured discharge next to the compressor pressure should be within 7 psig of the graph 130 Ton Operating Pressure Curve All Compressors and Condenser Fans per ckt COOLING CYCLE PRESSURE CURVE Based on Indoor Airflow of 400 CFM Ton FULL LOAD 380 360 105 F OD Ambient o 340 i 95 F OD Ambient 0 320 300 85 F OD Ambient 280 75 OD Ambient g 260 g 65 F OD Ambient G 240 220 200 180 50 55
45. Control Mod ules UCM which provides operating functions that are sig nificantly different than conventional units Refer to the Start Up and Test Mode procedures within this Installation Op eration amp Maintenance manual and the latest edition of the appropriate programming manual for CV or VAV applications before attempting to operate or service this equipment Note The procedures discussed in this manual should only be performed by qualified experienced HVAC technicians Overview of Manual This booklet describes proper installation start up opera tion and maintenance procedures for 20 through 130 Ton rooftop air conditioners designed for Constant Volume CV and Variable Air Volume VAV applications By carefully re viewing the information within this manual and following the instructions the risk of improper operation and or component damage will be minimized Note One copy of the appropriate service literature ships inside the control panel of each unit It is important that periodic maintenance be performed to help assure trouble free operation Should equipment failure occur contact a qualified service organization with qualified experi enced HVAC technicians to properly diagnose and repair this equipment Note Do Not release refrigerant to the atmosphere If adding or removing refrigerant is required the service technician must comply with all federal state and local laws Section One About
46. D12 115 Tons D13 130 Tons Digit 8 Power Supply 4 460 60 3 XL 5 575 60 3 XL E 200 60 3 XL F 230 60 3 XL Digit 9 Heating Capacity 0 Heat H High Heat 2 J Limited Modulating High Heat P Full Modulating High Heat Note When the second digit calls for E electric heat the following values apply in the ninth digit W 190 kw Note When the second digit calls for L or S one of the following valve size values must be in Digit 9 High Heat Coil 3 1 0 4 1 25 5 1 50 6 2 0 7 2 5 Low Heat Coil C 1 0 D 1 25 1 50 F 2 0 G 2 5 Digit 10 Design Sequence W Disconnect Redesign Note Sequence may be any letter Z or any digit 1 thru 9 Digit 11 Exhaust Option O None 7 100 15 HP w Statitrac 8 100 20 HP w Statitrac 9 100 25 HP w Statitrac F 50 15 HP H 100 30 HP Statitrac J 100 40 HP w Statitrac 100 15 Statitrac CV Only L 100 20 w o CV Only 100 25 HP w o Statitrac CV Only N 100 30 HP w o Statitrac CV Only P 100 40 HP w o Statitrac CV Only 123 4 5 67 8910 111213 14 15 16 17 18 19 20 21 Digit 12 Exhaust Air Fan Drive 0 None 5 500 RPM 6 600 RPM 7 700 8 800 Digit 13 Filter Throwaway High Efficiency Throwaway D with Prefilter Cartridge with Prefilter F Th
47. Fan Location with Human Interface Designator 90 TON HI designator 1A 1K7 1B 1K8 2B4 2a 1K9 2B6 1K10 2B 1K10 1 9 2B2 281 1K8 1K8 105 amp 115 TON HI designator 1A 1B 1K8 IT 2 19 BA 2B6N 1K10 2B 1K10 1 0 1 9 2819 1K8 2B1 1K8 2B2 1K8 130 TON HI designator 1A 1B 1KB 2B6 2B4 2B 1 10 1 9 1 10 2 19 2B20 1K8 1K8 2B2 2B1 1K8 1K8 S HF C20 HI designator NM 281 B 2B2 S HF C25 C30 HI designator A 2B1 B 2B2 2B2 288 18 Q 1K8 S HF C40 HI designator 1A 2 1 1B 2B2 2B4 2A 2B4 1K9 2B 2 5 1K10 1K8 S HF C50 C55 HI designator 1A 281 18 2B2 284 282 283 1K9 1K8 2a 2B4 28 285 1K10 1K8 1K10 S HF C60 C75 HI designator 2BL 283 1K10 1 2B4 2H 285 1K9 1K8 5 Use Table 4 1 to program the Supply Fan for operation by scrolling through the displays 6 Once the configuration for the Fan is complete press the NEXT key until the LCD displays the Start test in screen Press the key to designate the delay before the test is to start This service test will begin after the TEST
48. Inspect all control panel components tighten any loose connections Connect properly sized and protected power supply wir ing to a field supplied installed disconnect and unit Properly ground the unit Note All field installed wiring must comply with NEC and applicable local codes Installation Continued Field Installed Control Wiring Complete the field wiring connections for the constant volume controls as applicable Refer to Field Installed Control Wiring for guidelines Complete the field wiring connections for the variable air volume controls as applicable Refer to Field Installed Control Wiring for guidelines Note field installed wiring must comply with NEC and applicable local codes Requirements for Electric Heat Units SEHF Units 380 minimum voltage amp SEHG units Verify that the power supply complies with the electric heater specifications on the unit and heater nameplate Inspect the heater junction box and control panel tighten any loose connections Check electric heat circuits for continuity SEHF Units w 200V or 230V Electric Heat Requires Separate Power Supply to Heater Connect properly sized and protected power supply wir ing for the electric heat from a dedicated field supplied installed disconnect to terminal block 4TB2 or to an op tional unit mounted disconnect switch 4515 Requirements for Gas Heat Gas supply line properly siz
49. ON UNITS WITH HEATING OPTION TERMINAL BLOCK 17817 AND ASSOCIATED WIRING REQUIRED WITH GBAS 1051 OPTION DEMAND LIMIT RELAY 5K89 TO BE PROVIDED BY CUSTOMER VENTILATION OVERRIDE CONTACTS RATED 12MA 24VDC MINIMUM 5K90 5 91 5K92 5K93 5K94 TO BE PROVIDED BY CUSTOMER WIRE NODES 533 534 REQUIRED WITH BAS NETWORK COMM MODULE 1054 OPTION USE SHIELDED TWISTED PAIR WIRE JSAHHAHAAAAAA A A em 15A FUSE REPLACEMENT IS REQUIRED FOR 50 THRU 60 0 50 TRANSFORMER WITH 200 230V 460V OR 575V UNIT VOLTAGE 20A FUSE REPLACEMENT IS REQUIRED FOR 50 THRU 60 TON 0 50 TRANSFORMER WITH 380V 415V UNIT VOLTAGE CONTACTS RATED 12 MA 24VDC MINIMUM CONNECT TO 24VAC CLASS 2 CIRCUITS ONLY REMOVE JUMPER WHEN OPTIONAL FIELD SUPPLIED OUTSIDE AIR SENSOR 3RT3 IS INSTALLED AND THE UNIT DOES NOT HAVE ECONOMIZER amp AAA A FIELD SUPPLIED AND INSTALLED OCCUPIED UNOCCUPIED CONTACTS 5K86 FOR USE ON UNITS WITHOUT REMOTE PANEL WITH NIGHT SETBACK 5058 2309 3396 51 3 17 Typical Field Wiring Diagram for 20 through 130 Control Option WARNING AVERTISSEMENT HAZARDOUS VOLTAGE VOLTAGE HASARDEUX DECONNECTEZ TOUTES LES SOURCES ELECTRIQUES INCLUANT LES DISJ
50. START key is pressed and the delay desig nated in this step has elapsed Press the ENTER key to confirm this choice N wanNING Live Electrical Components During installation testing servicing and troubleshoot ing of this product it may be necessary to work with live electrical components Have a qualified licensed electri cian or other individual who has been properly trained in handling live electrical components perform these tasks Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury 64 7 Press the TEST START key to start the test Remember that the delay designated in step 6 must elapse before the fans will begin to operate 8 With the system in the SERVICE MODE and the supply fan rotating in the proper direction measure the amper age at the supply fan contactor 1K16 amp 1K15 additional contactor for 90 thru 130 Ton units If the amperage ex ceeds the motor nameplate value the static pressure is less than design and the airflow is too high If the amper age is below the motor nameplate value static pressure may be too high and CFM may be too low To determine the actual 5 a Measure the actual fan RPM b Calculate the Theoretical BHP Actual Motor Amps X Motor HP Motor Nameplate Amps c Plot this data onto the appropriate Fan Performance Curve in Figure 4 2 Where the two points in
51. THE FIELD General Information Continued Control Module Locations for S HF 40 60 70 amp Control Module Locations for S HF 50 amp 55 Ton Units 75 Ton Units NOTES lt T PLACE SCREW IN THE CENTER MOUNTING HOLE S OF ANY UCM BOARD TO ALLOW FOR EASIER BOARD REMOVAL IN THE FIELD NOTES DO NOT PLACE A SCREW IN THE CENTER MOUNTING HOLE S OF ANY UCM BOARD TO ALLOW FOR EASIER BOARD REMOVAL IN THE FIELD a Control Module Locations for S HG 90 130 Ton Units NOTES lt I DO NOT PLACE A SCREW IN THE CENTER MOUNTING HOLE S OF ANY UCM BOARD TO ALLOW FOR EASIER BOARD REMOVAL IN THE FIELD 13 Section One About Manual aaa Gas Literature Change History Overview of Manual Section Two General Information 74 Model Number Description Hazard Identification u Commonly Used Acronyms Unit Description 002011 Input Devices amp System Functions Constant Volume amp Variable Air Volume Units Constant Volume CV Units Variable Air Volume VAV Units
52. The Manual a u aa iu mata iu paqa Literature Change History Overview of 22 Section Two General Information Model Number Description Hazard Identification eene Commonly Used Acronyms Unit Description oett ette Input Devices amp System Functions Constant Volume amp Variable Air Volume Units Constant Volume CV Variable Air Volume Units Space Temperature Averaging Unit Control Modules UCM Section Three Installatiohi 5 i NS Unit lrispectiOn 2 e pte eem 1 cM c Whit Clearances uai s Unit Dimensions amp Weight Information Roof Curb and Ductwork Pitch Pocket Location 2 242422 1 Unit Rigging amp General Unit Requirements Main Electrical Power Requirements Field Installed Control Wiring
53. Throwaway D with Prefilters Cartridge with Prefilters F No Filters T A Rack Only G No Filters Bag Cart Rack Only Digit 14 Supply Fan Horsepower 12 3 0HP 6 200 2 7 25 0 HP 3 7 5 8 30 0 HP 4 10 0 9 40 0 HP 5 15 0 Digit 15 Supply Fan Drive 5 500 RPM 1100 RPM 6 600 RPM 1200 7 700 D 1300 RPM 8 800 RPM 1400 9 900 RPM 1500 1000 1600 Digit 16 Fresh Air Section A No Fresh Air B 0 25 Manual D 0 100 Economizer 1 Available as standard 460 volt only for 70 and 75 ton models Digit 17 System Control 1 CV Control Zone Control 2 VAV S A Temp Control without Inlet Guide Vanes 3 VAV S A Temp Control with Inlet Guide Vanes 4 Space Pressure Control with Exhaust VFD without Bypass 5 Space Pressure Control with Exhaust VFD and Bypass 6 Temperature Control with VFD w o Bypass 7 VAV Air Temperature Control with VFD and Bypass 8 Supply and Exhaust Fan with VFD without Bypass 9 Supply and Exhaust Fan with VFD and Bypass Digit 18 Accessory Panel 0 None BAYSENS008 B BAYSENS010 BAYSENS013 D BAYSENS014 BAYSENSO 19 F BAYSENS020 BAYSENS021 Digit 19 Ambient Control 0 Standard 1 2 0 Degree Fahrenheit Digit 20 Agency Approval 0 None UL Gas Heater see note 1
54. Turn the 115 volt control circuit switch 151 and the 24 volt control circuit switch 1570 to the On position 5 Open the Human Interface access door located in the unit control panel and press the SERVICE MODE key to display the first service screen Refer to the latest edition of the RT SVPO1A EN for CV applications or RT SVPO2A EN for applications for the SERVICE TEST screens and programming instructions 6 Use Table 4 1 to program the following system compo nents for operation by scrolling through the displays 20 to 30 Ton Compressor 1A On Compressor 1B Off Condenser Fans 40 through 60 Ton Compressor 1A On Compressor 1B Off Compressor 2A Off Compressor 2B Off Condenser Fans 70 amp 105 Ton Compressor 1A amp 1B On Compressor 1C Off Compressor 2A amp 2B Off Compressor 2C Off Condenser Fans 115 amp 130 Ton Compressor 1A amp 1B On Compressor 1C amp 1D Off Compressor 2A amp 2B Off Compressor 2C amp 2D Off Condenser Fans 7 Attach a set of service gauges onto the suction and dis charge gauge ports for each circuit Refer to Figure 4 6 for the various compressor locations 8 Once the configuration for the components is complete press the NEXT key until the LCD displays the Start test in screen Press the key to designate the delay before the test is to start This service test will begin after the TEST START key is pressed and the delay desig nated i
55. adjust the combustion air damper to increase or decrease the amount of air enter ing the combustion chamber Refer to Figure 4 10 for the location of the combustion air damper 8 Recheck the oxygen and carbon dioxide levels after each adjustment After completing the high fire checkout and adjustment procedure the low fire setting may require adjusting Low Fire Adjustment MBH 850 amp 1 000 MBH only Use the TEST initiation procedures outlined in the previ ous section to operate the furnace in the low fire state 1st Stage 2 Use a carbon dioxide analyzer and measure the percent age of carbon dioxide in the flue gas Refer to the illus tration in Figure 4 7 Inset A Take several samples to as sure that an accurate reading is obtained Refer to Table 4 8 for the proper carbon dioxide levels If the measured carbon dioxide level is within the listed values no adjustment is necessary A carbon dioxide level ex ceeding the listed range indicates incomplete combus tion due to inadequate air or excessive gas 3 Check the manifold gas pressure by using the manifold pressure port on the gas valve Refer to Table 4 8 for the required manifold pressure during low fire operation If it needs adjusting remove the cap covering the low fire adjustment screw on the gas valve Refer to Figure 4 8 for the adjustment screw location Turn the screw clock wise to increase the gas pressure or counterclockwise to decrease the gas
56. an economizer but can be field provided installed and used for informational purposes on units without an economizer Refer to the appropriate il lustrations in Figure 3 16 or 3 17 for the proper connection terminals in the unit control panel Refer to Table 3 10 for Temperature vs Resistance coefficient Generic Building Automation System 1U51 The Generic Building Automation System GBAS module allows a non Trane building control system to communicate with the rooftop unit and accepts external setpoints in form of analog inputs for cooling heating demand limiting and supply air pressure parameters Refer to Figure 3 18 for the input wiring to the GBAS module and the various desired setpoints with the corresponding DC voltage inputs for both VAV and CV applications For complete application details of the module refer to Engineering Bulletin UN PRBOO1 EN Figure 3 16 Typical Field Wiring Diagram for 20 through 130 Control Options WARNING HAZARDOUS VOLTAGE DISCONNECT ALL ELECTRIC POWER INCLUDING REMOTE DISCONNECTS BEFORE SERVICING FAILURE TO DISCONNECT POWER BEFORE SERVICING CAN CAUSE SEVERE PERSONAL INJURY OR DEATH AVERTISSEMENT VOLTAGE HASARDEUX DECONNECTEZ TOUTES LES SOURCES ELECTRIQUES INCLUANT LES DISJONCTEURS SITUES A DISTANCE AVANT D EFFECTUER L ENTRETIEN FAUTE DE DECONNECTER LA SOURCE ELECTRIQUE AVANT D EFFECTUER L ENTRETIEN PEUT ENTRAINER DES BLESSURES CORPORELLES SEVERES OU LA M
57. area b Measure the difference between the pressures at both locations c Plot this value onto the appropriate pressure drop curve in Figure 4 3 Use the data in Table 4 2 Component Static Pressure Drops to assist in calculating a new fan drive if the CFM is not at design specifications d Plug the holes after the proper CFM has been established 9 Press the STOP key at the Human Interface Module in the unit control panel to stop the fan operation 65 Exhaust Airflow Measurement Optional with all Units 1 Close the disconnect switch or circuit protector switch that provides the supply power to the unit s terminal block 1TB1 or the unit mounted disconnect switch 1514 A warnine Hazardous Voltage Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvert ently energized Failure to disconnect power before ser vicing could result in death or serious injury HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK 1TB1 OR UNIT DISCONNECT SWITCH 1514 2 Turn the 115 volt control circuit switch 151 and the 24 volt control circuit switch 1570 to the On position 3 Open the Human Interface access door located in the unit control panel and press the SERVICE MODE key to display the first service screen Refer to the latest edition of the appropriate SAHF PTG manual for CV or VAV ap plications for the SERVICE TEST screens and
58. be opened A warnine Hazardous Voltage Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power not be inadvert ently energized Failure to disconnect power before ser vicing could result in death or serious injury Once the door has been opened it can be closed with the handle in any one of the three positions outlined above provided it matches the disconnect switch position The handle can be locked in the OFF position While holding the handle in the OFF position push the spring loaded thumb key attached to the handle into the base slot Place the lock shackle between the handle and the thumb key This will prevent it from springing out of posi tion An overall layout of the field required power wiring is illus trated in Figure 3 14 T insure that the unit s supply power wiring is properly sized and installed follow the guildelines outlined below Additional Disconnect Switch External Handle Air Handler Units Only Slot Looking Thumb Key Fi Under Handle Disconnect Switch External Handle Main Control Panel Note All field installed wiring must conform to NEC guide lines as well as State and Local codes warnine Live Electrical Components During installation testing servicing and troubleshoot ing of this product it may be necessary to work with live electrical component
59. board 4U18 and the post purge time delay relay 4014 is de energized The combustion blower motor will continue to operate for approximately 15 seconds to purge the heat exchanger on the Off cycle Honeywell Ignition System 500 amp 850 MBH Natural Gas When a heating requirement exists the Rooftop Module RTM starts the supply fan and sends a request for heat to the Heat Module The Heat Module closes K1 contacts and starts the combustion blower motor 4B11 The combustion blower motor starts on low speed through the normally closed combustion blower relay 4K33 contacts The supply airflow switch 4538 and the combustion air switch 4525 closes Power is applied through the high limit cutout 4526 to the Honeywell ignition control board 4018 The ignition control board 4018 starts a pre purge timing cycle At the end of the pre purge cycle the ignition transformer 4T7 and the pilot solenoid valve 419 are en ergized This starts a 10 second trial for pilot ignition When the pilot flame is established and sensed by the flame sens ing rod 4U19 stage 1 of the main gas valve 4L7 and the 60 seconds sequencing time delay relay 4016 is ener gized The system will operate in the low heat mode until there is an additional call for heat is established by closing the K3 contacts on the Heat Module On Variable Air Volume systems the sequencing time delay relay 4DL6 will energize the combustion blower motor re
60. contactor 1K17 If the amperage ex ceeds the motor nameplate value the static pressure is less than design and airflow is too high If the amperage is below the motor nameplate value static pressure may be too high and CFM may be too low To determine the actual 5 a Measure the actual fan RPM b Calculate the Theoretical BHP Actual Motor Amps X Motor HP Motor Nameplate Amps Use Tables 4 3 amp 4 4 to calculate a new fan drive if the CFM is not at design specifications 8 Press the STOP key at the Human Interface Module in the unit control panel to stop the fan operation Traq Sensor Airflow Measurement Optional with all units equipped with an economizer 1 Open the Human Interface access door located in the unit control panel and press the SERVICE MODE key to display the first service screen Refer to the latest edition of the appropriate SAHF PTG manual for CV or VAV ap plications for the SERVICE TEST screens and program ming instructions 2 Use Table 4 1 to program the following system compo nents for Economizer operation by scrolling through the displays Supply Fan On Inlet Guide Vanes 10096 Open if applicable Fresh Air dampers Selected Open Variable Frequency Drive 10096 Output if applicable RTM Occ Unocc Output Unoccupied Outside Air CFM Setpoint Outside Air Pre Heater Operation if applicable 3 Once the configuration for the components is complete press the NEXT key
61. designated in step 4 must elapse before the system will begin to operate 6 After all of the compressors and condenser fans for the number 1 circuit have been operating for approximately 30 minutes observe the operating pressures Use the appropriate pressure curve in Tables 4 6 to determine the proper operating pressures For superheat and sub cooling guidelines refer to Thermostatic Expansion Valves and Charging by Subcooling at the end of this section Unit Start Up Continued Note Do Not release refrigerant to the atmosphere If adding or removing refrigerant is required the service technician must comply with all Federal State and local laws Refer to general service bulletin MSCU SB 1 latest edition 7 Nerify that the oil level in each compressor is correct The oil level may be down to the bottom of the sightglass but should never be above the sightglass 8 Press the STOP key at the Human Interface Module in the unit control panel to stop the system operation 9 Repeat steps 1 through 8 for the number 2 refrigeration circuit 10 After shutting the system off check the compressor s oil s appearance Discoloration of the oil indicates that an abnormal condition has occurred If the oil is dark and smells burnt it has overheated because of compressor is operating at extremely high condensing temperatures high superheat a compressor mechanical failure or oc currence of a motor burnout If the oil is
62. diagnostic is displayed on the Human Interface LCD screen For heating control settings and time delay specifications refer to Table 5 1 Use the checklist provided below conjunction with the General Unit Requirement checklist to ensure that the unit is properly installed and ready for operation Be sure to complete all of the procedures described in this section be fore starting the unit for the first time Turn the field supplied disconnect switch located up stream of the rooftop unit to the Off position A warnine Hazardous Voltage Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvert ently energized Failure to disconnect power before ser vicing could result in death or serious injury Turn the 115 volt control circuit switch 151 to the Off position It is located in the secondary of the 1T1 trans former Turn the 24 volt control circuit switch 1570 to the Off position It is located in the secondary of the 172 amp 173 transformers Turn the System selection switch at the Remote Panel to the Off position and the Fan selection switch if Applicable to the Auto or Off position Check all electrical connections for tightness and point of termination accuracy Verify that the condenser airflow will be unobstructed Check the compressor crankcase oil leve
63. e CN 0 0 ih 0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000 CFM Figure 4 2 Continued 40 50 amp 55 Ton Supply Fan Performance without Inlet Guide Vanes 8 0 7 7 5 701 6 5 601 551 5 0 4 5 4 0 35 3 0 STATIC PRESSURE Inches w c 251 2 0 1 5 1 0 0 5 0 0 0 60 70 amp 75 Ton Supply Fan Performance without Inlet Guide Vanes STATIC PRESSURE Inches w c 1200 RPM 1100 RPM 1000 RPM 900 RPM 800 RPM 700 600 RPM 500 2000 4000 6000 8000 1200 RPM u 1100 1000 RPM 900 800 RPM 20 700 RPM LARES 7740 HP 600 RPM 500 40 wocfm 50 10000 12000 14000 16000 18000 20000 22000 24000 26000 28000 30000 40 dac s 80 90 wocfm 0 3000 6000 9000 12000 15000 18000 CFM 68 21000 27000 30000 33000 36000 S_HFC40 C50 C55 Dual 20 X 20 Fans Entrance Losses without Inlet Guide Vanes without Evap Coil without Filters without Return Air Dampers without Exhaust Fan Curve Limits Minimum Motor HP 7 5 Maximum Motor HP C40 C50 amp C55 30 HP Maximum RPM 7 5 15 1141 20 30 HP 1170 40 18 000 50 22 500 55 24 000 Maximum Static Pressure Leaving the Unit 4 0 w c S_HFC60 C
64. equipped with rubber or spring isolators have mounting bolts at the same locations and must not be removed Rubber Isolator Locations Detail 180 2 180 1 1 2 Tie Down Bol 4 Locations ceo 022 1 2 Flat Washe j fur ee oe SE Goan Rn p 80 5 r o I Shipping Channel TOP VIEW IS0 4 IS0 3 Spring Isolator Locations 190 1 180 2 Shipping Channel Fan Assembly Rail Ground Strap Right End View TE Unit Base Rail Do Not Remove 90 through 130 Ton Supply Fan Assembly TOP VIEW ee 6 Tie Down j Shipping Channel Tie Down Bolt Shipping Channel Optional Exhaust Fan Assembly TOP VIEW IS0 4 NI Tie Down Bolt Shipping Channel z Tie Down Bolt Shipping Channel Shipping Channel 4 180 2 Fan Assembly Rail Ground 8trap Right End View 59586 Unit Base Rail Do Not Remove 30 190 4 IS0
65. field supplied wiring to extend the control wires from the heater section to the valve Two access holes are pro vided in the unit base as illustrated in Figure 3 2 Following the guidelines listed below will enhance both the installation and operation of the wet heat system Figure 3 13 illustrates the recommended piping configura tions for the steam coil Table 3 5 list the coil connection sizes Note The valve actuators are not waterproof Failure to protect the valve from moisture may result in the loss of heating control 1 Support all field installed piping independently from the heating coil 2 Use swing joints or flexible connectors adjacent to the heating coil These devices will absorb the strains of ex pansion and contraction 3 Install the 2 way valve in an upright position Ensure that the valve s location lends itself to serviceability 4 Pitch the supply and return steam piping downward 1 per 10 of run in the direction of flow 5 All return lines and fittings must be equal to the diameter of the outlet connection on the steam coil s If the steam trap connection is smaller that the coil outlet di ameter reduce the pipe size between the strainer and the steam trap connections only 6 Install a 1 2 15 degree swing check vacuum breaker at the top of the return coil header using the tapped pipe connection Position the vacuum breaker as close to the coil as possible Note Vacuum breakers shou
66. flow during operation the unit and curb must be as level as possible The maximum slope allowable for rooftop unit applications excluding SSH s is 4 end to end and 2 side to side Units with steam coils SSH s must be set level If the unit is elevated a field constructed catwalk around the unit is strongly recommended to provide easy access for unit maintenance and service Recommendations for installing the Supply Air and Return Air ductwork joining the roof curb are included in the curb instruction booklet Curb ductwork must be fabricated and installed by the installing contractor before the unit is set into place Note For sound consideration cut only the holes in the roof deck for the ductwork penetrations Do not cut out the entire roof deck within the curb perimeter 5 Engineering Bulletin 80 provides additional information concerning duct design and sound reduction Pitch Pocket Location The location of the main supply power entry for S_HF 20 through 75 Ton units is located at the bottom right hand corner of the control panel Figures 3 2A B C illus trate the location for the electrical entrance through the base in order to enter the control panel If the power supply conduit penetrates the building s roof beneath this opening it is recommended that a pitch pocket be installed before the unit is placed onto the roof curb The center line dimen sions shown in the illust
67. header using the tapped pipe connection Or b vent the coil from the top of the return header down to the return piping At the vent connection size the return piping to provide sufficient water velocity 9 Install a Globe type valve in the Bypass line as shown in Figure 3 12 Table 3 5 Connection Sizes for Hot Water amp Steam Coil See Note 1 Heat Coil Connections Section diameter inches Unit Model Capacity and Size Note 2 Suppl Return SLH 20 High or 2 1 2 2 1 2 to 130 Low Heat SSHF 20 High or to 30 Low Heat 3 1 1 4 SSHF 40 High Heat 3 1 1 2 to 75 Note 3 Low Heat 1 1 2 T SSHG 90 Low Heat to 130 Note 3 Notes 1 Type W coils with center offset headers are used in SLH_ units Type NS coils are used in SSH_ units 2 See Digit 9 of the unit model number to determine the heating capacity 3 SSH 40 to 130 Ton units have multiple headers Steam Heat Units SSH Steam heating coils are factory installed inside the heater section of the unit The coils are pitched within the units to provide the proper condensate flow from the coil To main tain the designed degree of pitch for the coil the unit must be level Once the unit is set into place the steam piping and the factory provided two way modulating valve must be in stalled The valve can be installed inside the heater section or near the unit If the valve is installed in a remote location Installation Continued use
68. installation and servicing of equipment referred to in this publication With 3 D Scroll Compressors 2004 American Standard Inc All rights reserved Note This document is customer property must be retained by the unit s owner for use by maintenance personnel Literature Change History RT SVX10C EN November 2004 Re issue of manual for minor corrections to Connection Sizes Table 3 5 provides specific installation operation and maintenance instructions for S_HF with 6 and later design sequence 5 with Y and later de sign sequence with constant volume CV or variable air volume VAV controls RT SVX10C EN October 2004 Re issue of manual for minor corrections to warranty and updated sensor numbers BAYSENS019 20 provides specific installation operation and maintenance instruc tions for S_HF with 6 and later design sequence and S HG with Y and later design sequence with constant volume CV or variable air volume VAV controls RT SVX10C EN July 2004 Re issue of manual for minor WARNING and CAUTIONS and Warranty information updates provides specific in stallation operation and maintenance instructions for S HF with 6 and later design sequence and S HG with Y and later design sequence with constant volume CV or variable air volume VAV controls RT SVX10C EN December 2003 Re issue of manual for minor changes to programming parameters provides specific inst
69. installation of ultravio let lights its equipment for the intended purpose of im proving indoor air quality High intensity C band ultravio let light is known to severely damage polymer plastic materials and poses a personal safety risk to anyone exposed to the light without proper personal protective equipment Polymer materials commonly found in HVAC equipment that may be susceptible include insulation on electrical wiring fan belts thermal insulation various fasteners and bushings Degradation of these materials can result in serious damage to the equipment Trane accepts no responsibility for the performance or operation of our equipment in which ultraviolet devices were installed outside of the Trane factory or its approved suppliers 115 116
70. is used when the RTM has been programmed as the source for zone temperature control Refer to Table 3 10 for the Tem perature vs Resistance coefficient Remote Zone Sensor 5 5014 This electronic analog sensor features single setpoint capa bility and timed override with override cancellation It is used with a Trane Integrated Comfort system Refer to Table 3 10 for the Temperature vs Resistance coefficient Remote Zone Sensor 5RT16 5U57 and 5U69 BAYSENSO16A This bullet type analog Temperature sensor can be used for outside air ambient sensing return air temperature sens ing supply air temperature sensing remote temperature sensing uncovered morning warm up temperature sens ing and for VAV zone reset Wiring procedures vary accord ing to the particular application and equipment involved When this sensor is wired to a BAYSENSO 19 or BAYSENS020 Remote Panel wiring must be 18 AWG Shielded Twisted Pair Belden 8760 or equivalent Refer to Table 3 10 for the Temperature vs Resistance coefficient Remote Zone Sensor 5 16 5U57 and 5U69 BAYSENSO17B This electronic analog sensor can be used with BAYSENSO19 020 or 021A Remote Panels When this sensor is wired to a BAYSENSO19 or BAYSENSO20 Re mote Panel wiring must be 18 AWG Shielded Twisted Pair Belden 8760 or equivalent Refer to the specific Remote Panel for wiring details Remote Minimum Position Potentiometer 5070 BAYSTAT023A
71. must comply with all federal state and local laws Refer to general service bulletin MSCU SB 1 latest edition Heating Season Before completing the following checks turn the unit OFF and lock the main power disconnect switch open N wanNING Hazardous Voltage Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvert ently energized Failure to disconnect power before ser vicing could result in death or serious injury Inspect the unit s air filters If necessary clean or replace them Check supply fan motor bearings repair or replace the motor as necessary Lubricate the supply fan bearings with a lithium based grease Refer to Table 5 6 for recommended greases Note The bearings are manufactured using a special synthetic lithium based grease designed for long life and minimum lube intervals Too much lubrication in a bearing can be just as harmful as not enough Use a hand grease gun to lubricate the bearings add grease until a light bead appears all around the seal Do not over lubricate 108 Service amp Maintenance Continued After greasing the bearings check the setscrews to ensure that the shaft is held securely Make sure that all bearing braces are tight Inspect both the main unit control panel and heat section control box for loose electrical components and terminal conn
72. network Using a velocity pressure sensing ring located in the fresh air section allows the VCM to monitor and control the quan tity of fresh air entering the unit to a minimum airflow set point An optional temperature sensor can be connected to the VCM which enables it to control a field installed fresh air preheater An optional CO sensor can be connected to the VCM to control CO reset The reset function adjust the minimum CFM upward as the CO concentrations increase The maximum effective reset setpoint value for fresh air enter ing the unit is limited to the systems operating CFM The following table lists the Minimum Outside Air CFM vs Input Voltage Minimum Outside Air Setpoint w VCM Module amp Traq Sensing Unit Input Volts CFM 20 amp 25 Ton 0 5 4 5 vde 0 14000 30 Ton 0 5 4 5 vde 0 17000 40 Ton 0 5 4 5 vde 0 22000 50 amp 55 Ton 0 5 4 5 vde 0 28000 60 thru 75 Ton 0 5 4 5 0 33000 90 thru 130 0 5 4 5 0 46000 The velocity pressure transducer solenoid assembly is illus trated below Refer to the Traq Sensor Sequence of Op eration section for VCM operation Velocity Pressure Transducer Solenoid Assembly Assembly is located the Filter Compartment Tube From Tee to Tube From Solenoid to Low Side of transducer High Side of Transducer Tube From High Side of Velocity Flow Ring Tube From Low Side of Velocity Flow Ring
73. others keep in mind that these commercial rooftop units do not have base pans in the condenser section Note this is REPLACEMENT UNIT keep in mind that the CURRENT DESIGN commerical rooftop unitsdo not have base pans in the condenser section Unit Rigging amp Placement Z warnine Heavy Objects Do not use cables chains or slings except as shown Each of the cables chains or slings used to lift the unit must be capable of supporting the entire weight of the unit Lifting cables chains or slings may not be of the same length Adjust as necessary for even unit lift Other lifting arrangements may cause equipment or property only damage Failure to properly lift unit may result in death or serious injury See details below Note Use spreader bars as shown in the diagram Refer to the Installation manual or nameplate for the unit weight Refer to the Installation Instructions located inside the side control panel for further rigging information 1 A Center of Gravity illustration and the dimensional data is shown in Figure 3 3 2 Attach adequate strength lifting slings to all four lifting lugs on 20 through 75 Ton units and to all six lifting lugs on 90 through 130 Ton units The minimum distance be tween the lifting hook and the top of the unit should be 7 feet for 20 through 75 Ton units and 12 feet for 90 through 130 Ton units Figure 3 4 illustrates the installa tion of spreader bars to protect the unit and t
74. p h a wind screen around the unit may be required By restricting the airflow across the condenser coils saturated condensing temperatures can be maintained as the ambient temperatures change The low ambient modulating output s on the compressor module controls the low ambient damper actuator for each refrigerant circuit in response to saturated condensing tem perature When the control has staged up to it s highest stage stage 2 or 3 depending on unit size the modulating output will be at 10096 10 VDC When the control is at stage 1 the modulating output 0 to 10 VDC will control the saturated condensing temperature to within the programmable con densing temperature low ambient control point The following Table gives the minimum starting tempera tures for both Standard amp Low Ambient units Do not start the unit in the cooling mode if the ambient temperature is below the recommended operating temperatures Minimum Starting Ambient 1 Standard 2 Low Ambient with without Unit Size HGBP HGBP 20 amp 40 55 10 0 25 amp 30 50 10 0 70 130 45 102 02 55 40 10 0 50 35 10 0 60 30 10 0 Notes 1 Min starting ambients in degrees F and is based on unit operating at min step of unloading amp unloading amp 5 mph wind across condenser 2 With or Without HGBP 93 Damper Installation When a unit is ordered with the low ambient option i e Digit 19 is a
75. pressure psig discharge pressure The measured discharge next to the compressor pressure should be within 7 psig of the graph Ton Operating Pressure Curve All Compressors and Condenser Fans On COOLING CYCLE PRESSURE CURVE Based on Indoor Airflow of 400 CFM Ton FULL LOAD 380 360 340 105 F OD Ambient a 320 95 OD Ambient 2 30 280 85 OD Ambient 260 75 F OD Ambient 240 _____ 220 65 OD Ambient 200 180 50 55 60 65 70 75 80 85 90 95 100 SUCTION PRESSURE PSIG To Check Operating Pressures 1 2 3 Start the unit and allow the pressures to stabilize 4 Plot the outdoor dry bulb temperature and the Measure the outdoor air dry bulb temperature F operating suction pressure psig onto the chart entering the condenser coil 5 At the point of intersection read to the left for the Measure the discharge and suction pressure psig discharge pressure The measured discharge next to the compressor pressure should be within 7 psig of the graph 85 Table 4 6 Continued 30 Ton Operating Pressure Curve All Compressors and Condenser Fans On COOLING CYCLE PRESSURE CURVE Based on Indoor Airflow of 400 CFM Ton FULL LOAD 380 360 105 F OD Ambient 340 320 F OD Ambient 85 F OD Ambient
76. program ming instructions 4 Use Table 4 1 to program the following system compo nents for operation by scrolling through the displays Exhaust Fan Exhaust Dampers 100 Open if applicable Fresh Air dampers 100 Open Variable Frequency Drive 100 if applicable RTM Occ Unocc Output Default 5 Once the configuration for the components is complete press the NEXT key until the LCD displays the Start test screen Press the key to designate the delay before the test is to start This service test will begin after the TEST START key is pressed and the delay desig nated in this step has elapsed Press the ENTER key to confirm this choice N wanNING Live Electrical Components During installation testing servicing and troubleshoot ing of this product it may be necessary to work with live electrical components Have a qualified licensed electri cian or other individual who has been properly trained in handling live electrical components perform these tasks Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury 6 Press the TEST START key to start the test Remember that the delay designated in step 5 must elapse before the fans will begin to operate 66 Unit Start Up Continued 7 With the exhaust dampers open and the exhaust fan op erating at full airflow capability measure the amperage at the exhaust fan
77. result in death or serious injury HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK 1TB1 OR UNIT DISCONNECT SWITCH 1514 3 Turn the 115 volt control circuit switch 181 and the 24 volt control circuit switch 1570 to the On position 4 Open the Human Interface access door located in the unit control panel and press the SERVICE MODE key to display the first service screen Refer to the latest edition of the appropriate SAHF PTG manual for CV or VAV ap plications for the SERVICE TEST screens and program ming instructions 5 Use Table 4 1 to program the following system compo nents for operation by scrolling through the displays Supply Fan Inlet Guide Vanes 10096 Open if applicable Variable Frequency Drive 10096 Output if applicable RTM Occ Unocc Output Unoccupied 6 Once the configuration for the components is complete press the NEXT key until the LCD displays the Start test Sec screen Press the key to designate the de Unit Start Up Continued lay before the test is to start This service test will begin after the TEST START key is pressed and the delay designated in this step has elapsed Press the ENTER key to confirm this choice A warnine Live Electrical Components During installation testing servicing and troubleshoot ing of this product it may be necessary to work with live electrical components Have a qualified licensed electri cian or other individual who has been properly trained in handli
78. resulting value represents the amount of belt deflection that corresponds to the proper belt tension 2 Set the large O ring on the belt tension gauge at the de flection value determined in Step 1b 3 Set the small O ring at zero on the force scale of the gauge plunger 4 Place the large end of the gauge at the center of the belt span then depress the gauge plunger until the large O ring is even with the top of the next belt or even with a straightedge placed across the fan and motor sheaves Refer to Figure 5 1 5 Remove the belt tension gauge The small O ring now in dicates a number other than zero on the plunger s force scale This number represents the force in pounds re quired to give the needed deflection 6 Compare the force scale reading Step 5 with the ap propriate force value listed in Figure 5 1 If the force reading is outside the range readjust the belt tension Note Actual belt deflection force must not exceed the maximum force value shown in Figure 5 1 7 Recheck the belt tension at least twice during the first 2 to 3 days of operation Belt tension will decrease rapidly until the new belts are run in Service 8 Maintenance Continued Figure 5 1 Belt Tension Measurement and Deflection Ranges D e fl ec ti on B elt S p an Deflection Force Lbs 6 4 Steel Cable Belts Gripbelts Gripnotch Gripbelts Cross SmalilP D Section Range Min Max Min Max M
79. test pressure as specified in appli cable unit literature Failure to properly regulate pres sure could result in a violent explosion which could re sult in death or serious injury or equipment or prop erty only damage add when appropriate See maxi mum recommended unit test pressure below Access holes are provided on the unit as illustrated in Fig ure 3 2B to accomodate a side or bottom pipe entry on 20 through 75 Ton units and Figure 3 2C for bottom entry on 90 through 130 Ton units Following the guidelines listed below will enhance both the installation and operation of the furnace Note In the absence of local codes the installation must conform with the American National Standard Z223 1a of the National Fuel Gas Code latest edition 1 assure sufficient gas pressure at the unit use Table 3 4 as a guide to determine the appropriate gas pipe size for the unit heating capacity listed on the unit s name plate 2 If a gas line already exist verify that it is sized large enough to handle the additional furnace capacity before connecting to it 3 Take all branch piping from any main gas line from the top at 90 degrees or at 45 degrees to prevent moisture from being drawn in with the gas 4 Ensure that all piping connections are adequately coated with joint sealant and properly tightened Use a piping compound that is resistant to liquid petroleum gases 5 Provide a drip leg near the unit 32 Installa
80. the AC control wiring between the controls and the unit s termination point does not exceed three 3 ohms conductor for the length of the run Note Resistance in excess of 3 ohms per conductor may cause component failure due to insufficient AC voltage supply c Be sure to check all loads and conductors for grounds shorts and miswiring Table 3 8 AC Conductors Distance from Unit Recommended to Control Wire Size 000 460 feet 18 gauge 461 732 feet 16 gauge 733 1000 feet 14 gauge d Do not run the AC low voltage wiring in the same conduit with the high voltage power wiring Installation Continued Controls using DC Analog Input Outputs Before installing any connecting wiring between the unit and components utilizing a DC analog input output signal refer to the appropriate illustration in Figure 3 2 for the electrical access locations provided on the unit and Table 3 9 for conductor sizing guidelines and a Use standard copper conductor thermostat wire unless otherwise specified b Ensure that the wiring between the controls and the unit s termination point does not exceed two and a half 2 5 ohms conductor for the length of the run Note Resistance in excess of 2 5 ohms per conductor can cause deviations in the accuracy of the controls Table 3 9 DC Conductors Distance from Unit Recommended to Control Wire Size 000 150 feet 22 gauge 151 240 feet 20 gauge 241 385 feet 18 gauge 386
81. the satu rated condensing temperature is above the efficiency check point setting a fan stage will be added If the satu rated condensing temperature falls below the efficiency check point setting the fan control will remain at the present operating stage If a fan stage cycles four times within a 10 minute period the control switches from control ling to the lower limit to a temperature equal to the lower limit minus the temporary low limit suppression setting It will utilize this new low limit temperature for one hour to reduce condenser fan short cycling High Pressure Controls High Pressure controls are located on the discharge lines near the scroll compressors They are designed to open when the discharge pressure approaches 405 7 psig The controls reset automatically when the discharge pressure decreases to approximately 300 20 psig However the compressors on that circuit are locked out and a manual re set diagnostic is initiated Outdoor Air Humidity Sensor 3U63 Is an analog input device used on CV amp VAV applications with 100 economizer It monitors the outdoor humidity lev els for economizer operation It is mounted in the fresh air intake section and is connected to the RTM 1U48 Return Air Humidity Sensor 3064 Is an analog input device used on CV amp VAV applications with the comparative enthalpy option It monitors the return air humidity level and compares it to the outdoor humidity lev
82. to scroll to the Setup 1 setting Press the OK button v Press the Change Data button w Press the Up Arrow button to scroll to the Down load Parameters setting x Press the OK button Note Item 5 resets the drive to the default factory settings The program parameters listed in Table 5 8 will need to be verified or changed as described in Item 3 and 4 Note Some of the parameters listed in the Table are motor specific Due to various motors and efficiencies available use only the values stamped on the specific motor nameplate Do not use the Unit nameplate values 6 Follow the start up procedures for supply fan in the Vari able Air Volume System section or the Exhaust Airflow Measurement start up procedures for the exhaust fan 7 After verifying that the VFD s are operating properly press the STOP key at the Human Interface Module to stop the unit operation 8 Follow the applicable steps in the Final Unit Checkout section to return the unit to its normal operating mode Service amp Maintenance Continued Monthly Maintenance Before completing the following checks turn the unit OFF and lock the main power disconnect switch open N wanNING Hazardous Voltage Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvert ently energized Failure to disconnect power before ser vicing coul
83. unit s heater for temporary heat without first completing the startup procedure detailed under Starting the Unit Trane will not assume any responsibility for equipment damage resulting from condensate accumulation on the unit s electrical and or mechanical components Unit Clearances Figure 3 1 illustrates the minimum operating and service clearances for either a single or multiple unit installation These clearances are the minimum distances necessary to assure adequate serviceability cataloged unit capacity and peak operating efficiency Providing less than the recommended clearances may re sult in condenser coil starvation short circuiting of ex haust and economizer airflows or recirculation of hot con denser air Unit Dimensions amp Weight Information Overall unit dimensional data for a SAHF 20 thru 75 Ton cooling only unit is illustrated in Figure 3 2A Tables 3 1A 3 1B and 3 1C list the dimensions Dimensional data for SFH SSH and SXH 20 thru 130 units are illustrated in Figure 3 2B Tables 3 2A 3 2B and 3 2C list the dimensions for the 20 thru 75 Ton units Di mensions for 90 through 130 Ton units are listed on the il lustration in Figure 3 2C A Center of Gravity illustration and the dimensional data is shown in Figure 3 3 Table 3 3 list the typical unit and curb operating weights Weights shown represent approximate operating weights Actual weights are stamped on t
84. until the LCD displays the Start test Sec screen Press the key to designate the delay before the test is to start This service test will begin after the TEST START key is pressed and the delay desig nated in this step has elapsed Press the ENTER key to confirm this choice 4 Press the TEST START key to start the test Remember that the delay designated in step 3 must elapse before the fans will begin to operate 5 With the unit operating in the TEST the amount of outside air flowing through the traq sensor can be view by switching to the STATUS MENU screen 6 Scroll to the ECONOMIZER ENABLE ECONOMIZER POSITION screen by pressing the NEXT key and read the corresponding damper opening percentage 96 7 Press the STOP key at the Human Interface Module in the unit control panel to stop the unit operation 4 2 20 amp 25 Supply Fan Performance without Inlet Guide Vanes 8 0 S HFC20 amp 25 Ton 1700 RRM x E Dual 15 X 15 Fans 7 0 5 Entrance Losses 1600 RPM E without Inlet Guide Vanes 6 5 SY without Evap Coil gt 20 HP without Filters 6 0 1500 RPM ES 55 50 without Return Air Dampers 55 Se n3 OS without Exhaust Fan s S Su DE AL 60 Limits o NS 22 9 5 0 1400 RPM _ Sag Minimum Motor HP 3 N ES 15 HP Maximum Motor HP ui 45 S EM 20
85. 0 3710 16110 3 10 Units without Exhaust Fan Dim Dim 3710 3710 3710 40 40 40 4710 4 10 3 3 9 3 11 4 0 3 11 4 9 4 10 4 10 6 3 6 4 6 2 20711 6 2 6 3 21 10 6 3 with Supply amp 1 Dimensions shown for the center of gravity are approximate and are based on a unit equipped with Standard coils 100 economizer throwaway filters hi efficiency motors inlet guide vanes 460 volt XL start high capacity heat as applicable 21 Table 3 3 Typical Unit amp Curb Weights Typical Unit Operating Weight 1 Installation Continued Roof Curb Unit SESL Max Weight 3 Size SAHF 55 SFHF SXHF SEHG SFHG SXHG SAHF S HAG C20 4360 4690 4970 4580 490 510 C25 4520 4860 5130 4750 490 510 C30 5220 5590 5840 5460 490 510 C40 6890 7400 7880 7240 515 550 C50 7890 8450 8900 8290 515 550 C55 8140 8690 9170 8540 515 550 C60 9320 9650 10120 9480 610 640 C70 9860 10160 10640 10040 610 640 75 9860 10160 10640 10040 610 640 C90 14730 15400 14580 770 011 15310 15940 15160 770 012 15730 16370 15560 770 013 16080 16710 15930 770 Typical Unit Operating Weight 2 Roof Curb Unit SE SL Max Weight 3 Size SAHF SSHF SFHF SXHF SEHG SFHG SXHG SAHF 5 C20 4650 5000 5270 4860 490 510 C25 4830 5180 5440 5060 490 510 C30 5570 5930 6200 5800 490 510 C40 7290 7820 8280 7650 515 550 C50 8350 8900 9380 8740 515 550 C55 8600 9160 9640 9010 515 550 C60 9840 10150 10
86. 0 1000 RPM lt PM css 50 without Return Air Dampers 2S without Exhaust 8 5 5 Fan Limits 9 50 E Minimum Motor 10 S 900 RPM Maximum Motor 40 45 60 Maximum RPM 1130 u Maximum CFM 2 4091 8008 C60 27 000 o E C70 amp C75 30 000 3 5 X gt 5 70 ane Picus 30 22 lt eaving the Unit 4 0 w c 700 RPM gt A M 1 5 Mert 1 0 RS E 90 wocfm 0 5 0 0 es T a T T T 0 3000 6000 9000 12000 15000 18000 21000 24000 27000 30000 33000 36000 74 Figure 4 4 Continued 90 105 115 amp 130 Ton Supply Fan Performance with Inlet Guide Vanes Static Presure Inches w c 9 3800 RPM 1 300 RPM x OI 1200 RPM HEP nm I 1100 RPM 10000 20000 30000 40000 50000 60000 CFM 75 Table 4 2 20 through 75 Component Static Pressure Drops Inches W C Evaporator Coil Heating System Filters Econ CFM High ThrowawayPerm Bag Cartridge Std With Or Nom STD Std Capacity SFHEG SEHF G SLHF G SSHF G ae Wire And And Roof Without 14 000 29 22 39 29 26 20 22 22 28 15 28 07 07 203 56 50 07 08 50 55 17 000 39 30 53 40 39 29 32 31 40 22 41 40 10 04 72 68 12 11 20 000 51 39 68 52 58 41 44 42 52 30 51 12 12 205 188 88 19 17 24 000 69 53 91 70 73 58 62 48 72 45 75 16 16 207 1 11
87. 00 1 03 79 N A 36 21 41 48 36 50 16 96 96 32 130 39 000 1 21 4 N A N A 42 26 49 57 44 60 19 1 09 1 12 44 43 000 1 42110 45 30 57 66 53 71 22 1 22 1 30 04 46 000 1 581 23 N A N A 55 34 65 75 61 79 24 0 0 64 otes 1 Static pressure drops of accessory components must be added to external static pressure to enter fan selection tables 2 Gas heat section maximum temperature rise of 60 3 Throwaway filter option limited to 300 ft min face velocity 4 Bag filter option limited to 740 ft min face velocity 5 Horizontal roof curbs assume 0 50 static pressure drop or double the standard roof curb pressure drop whichever is greater 6 No additional pressure loss for model SXHF 7 90 130 ton roof curbs adds no pressure drop Table 4 3 90 through 130 100 Modulating Exhaust Fan Performance STD Negative Static Pressure AIR 0 25 W G 0 50 W G 0 75 W G 1 00 W G 1 25 W G 1 50 W G CFM RPM BHP RPM RPM RPM RPM RPM BHP 24 000 477 7 04 513 7 95 561 929 604 10 66 648 1215 693 13 83 27 000 530 9 80 558 10 69 597 11 99 639 13 54 677 15 08 716 16 73 30 000 584 13 24 608 14 16 637 15 34 675 16 96 712 18 67 746 20 38 33 000 638 17 42 659 18 39 683 19 53 713 21 02 749 22 88 781 24 75 36 000 693 2242 711 23 46 732 24 61 756 25 99 786 2775 818 2980 40 000 766 30 50 782 31 62 800 32 83 819 34 17 841 35 75 868 37 69 STD Negative Stat
88. 0000 14000 18000 20000 22000 24000 CFM 14000 18000 22000 26000 28000 30000 CFM 27000 32000 36000 40000 43000 46000 81 4 5 Fresh Air amp Return Air Linkage Adjustment Top View RETURN AIR DAMPERS FRESH AIR DAMPERS FILTER SECTION Compressor Start Up All Systems 1 Ensure that the System selection switch at the remote panel is in the Off position 2 Before closing the disconnect switch ensure that the compressor discharge service valve and the liquid line service valve for each circuit is back seated AN CAUTION Compressor Damage Do not allow liquid refrigerant to enter the suction line Excessive liquid accumulation in the liquid lines may result in compressor damage COMPRESSOR SERVICE VALVES MUST BE FULLY OPENED BEFORE START UP SUCTION DISCHARGE LIQUID LINE AND OIL LINE 3 Close the disconnect switch or circuit protector switch that provides the supply power to the unit s terminal block 1TB1 or the unit mounted disconnect switch 1514 to allow the crankcase heater to operate a minimum of 8 hours be fore continuing Note Compressor Damage could occur if the crankcase heater is not allowed to operate the minimum of 8 hours before starting the compressor s 82 Unit Start Up Continued 4
89. 01 2 CSA Note Includes UL clsssified gas heating section only when second digit of Model No isa F Digits 21 38 Miscellaneous 21 A Unit Disconnect Switch 22 Hot Gas Bypass 23 Economizer Control w Comparative Enthalpy 23 2 Economizer Control w Reference Enthalpy 23 W Economizer Control w Dry Bulb 23 O None W O Economizer 24 Low Leak Fresh Air Dampers 25 High Duct Temperature Thermostat 26 G High Capacity Evaporator Coil 27 Fins Cond only 28 Generic B A S Module 29 L High Efficiency Motors Supply amp Exhaust 30 M Remote Human Interface 31 N Ventilation Override Module 32 R Extended Grease Lines 33 T Access Doors 34 V Interprocessor Communications Bridge 35 0 No communication module 35 Trane Communication Interface Module 35 7 LonTalk Communication Interface Module 36 8 Spring Isolators 37 6 15A GFI Convenience Outlet 38 0 Sample Model No S X HG D 114 0 A H 7 C G 8 D 1 0 0 1 Digit No Digit 1 Unit Type S Self Contained Digit 2 Unit Function s E DX Cooling Electric Heat F DX Cooling Natural Gas Heat L DX Cooling Hot Water Heat S DX Cooling Steam Heat X DX Cooling Extended Casings Digit 3 Unit Airflow H Single Zone Digit 4 Development Sequence G Seventh Digits 5 6 7 Nominal Capacity C90 90 Tons D11 105 Tons
90. 1 On N A Default B A On B Off K10 On N A Default 40 thru 60 Ton 1A 1 1 12 Default 2A Off 2B Off 1B 1A On 1B Off K12 Off Default 2A Off 2B Off 2A 1A Off 1 B Off K12 Off Default 2A Off 2B On 2B 1A Off 1 B Off K12 Off Default 2A On 2B Off 70 thru 105 Ton 1A amp 1B 1A Off 1B On K12 On Default 2 2 1C 1A On 1B Off K12 Off Default 2 2 2 amp 2B 1A Off 1 B Off K12 Off Default 2A Off 2B On 2 1 1 12 Default 2 2 115 thru 130 1A amp 1B 1A Off 1B On K12 On Default 2 2 1C amp 1D 1A On 1B Off K12 Off Closed Closed Default 2A Off 2B Off 2A amp 2B 1A Off 1 B Off K12 Off Closed Closed Default 2A Off 2B On 2C amp 2D 1 1 K12 Off Closed Closed Default 2A On 2B Off CONDENSER FANS 20 Ton A 2B1 A On B Off Default B 2B2 A Off B On Default 25 30 Ton A 2B1 A On B Off Default B 2B2 2B3 A Off B On Default 40 Ton 1A 2B1 1A On 1B Off Default 2A Off 2B Off 1B 2B2 1A Off 1B On Default 2A Off 2B Off 2A 2B4 1A Off 1 B Off Default 2A On 2B Off 2B 2B5 1A Off 1 B Off Default 2A Off 2B On 50 amp 55 Ton 1A 2B1 1A On 1B Off Closed Closed Default 2A Off 2B Off 1B 2B2 2B3 1A Off 1B On Closed Closed Default 2A Off 2B Off 2A 2B4 1A Off 1 B Off Closed Closed Default 2A On 2B Off 2B 2B5 2B6 1A Off 1 B Off Closed Closed Default 2A Off 2B On 60 thru 75 Ton 1A 2B1 Off Off 1A On 1B Off Off Off Off Off Off
91. 12 13 14 15 16 17 18 19 20 21 Figure 4 8 Gas Valve Adjustment Screw Locations Top View 235 350 MBH High Fire Manifold Pressure 5 Adjustment Screw Located Under this Cover Turn Clockwise to Increase Turn Counterclockwise to Decrease Top View 500 850 1000 MBH 96 High Fire Manifold Pressure Adjustment Screw Turn Clockwise to Increase Turn Counterclockwise to Decrease Low Fire Manifold Pressure Adjustment Screw Turn Clockwise to Increase Turn Counterclockwise to Decrease Full Modulating Gas Full Modulating gas heaters are available for the 500 850 and 1000 MBH heater sizes These heaters are available the same cabinet sizes as the current heaters The firing rate of the unit can vary from the pilot rate of 125 MBH up to the nameplate rating of the unit The turn down ratios therefore vary from 4 1 for the 500 MBH to 8 1 for the 1000 MBH heater Heat Exchanger The heat exchanger drum tubes and front and rear ers are constructed from AL 6XN or 25 6MO two of the most corrosion resistant stainless steel alloys available Unit control The unit is controlled by a supply air temperature sensor lo cated in the supply air stream for VAV units CV units have two sensors one located in the supply air stream and the zone sensor
92. 25 7 5 Entrance Losses with Inlet Guide Vanes 7 0 1600 RPM EN xl without 5 without Filterts 6 5 Se Ss without Return Air dampers 6 0 1500 20 50 without Exhaust Fan i Z Fan Curve Limits 5 55 15 60 Minimum Motor HP 3 2 HOO REM 70 Maximum Motor HP 5 50 C20 amp C25 15 HP 45 1300 RPM Maximum RPM 10 5 1100 5 40 7 5 HP 15 HP 1655 DOORPM an 80 Maximum g 35 C20 9 000 a 30 _ 25 11 000 Maximum Static Pressure E 2 5 Leaving the Unit 4 0 w c 2 0 15 90 wocfm 1 0 0 5 0 0 0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000 30 Supply Fan Performance with Inlet Guide Vanes iih S HFC30 7 5 4 Dual 18 18 Fans 1 Entrance Losses 7 0 1400 with Inlet Guide Vanes 65 1 no 9 without Coil n T without Filters 6 0 1300 LM 25 50 without Return Air Dampers 1 1 20 without Exhaust 5 54 Fan Limits g 50 1 1200 RPM 15 Minimum Motor 5 5 ace Maximum Motor HP 20 454 ES EN Maximum RPM 1379 s o ui j 1100 60 Maximum 13 500 2 4 0 5 ES Maximum Static Pressure Leaving th it 4 0 w c 8 354 1000 5 eaving the Uni 0 w c 5 301 Eo 75 Us 70 1 EN gt t 800 RPM 2 0 SS ORES 80
93. 4 9 16 1 4 9 16 Dimensions 6 31 32 15 21 32 13 21 32 9 17 32 Installation Continued Dimensions A B D E F G H 21 934 5 3 1 8 7 61 2 5 815 16 3 9 5 16 21 934 5 85 8 7 61 2 6 27 16 4 95 16 6 7 3 8 5 8 7 8 Dimensions D 5 7 5 7 6 10 7 8 6 10 7 8 8 1 2 5 9 5 16 6 9 5 16 E 3 4 3 8 3 4 3 8 4 5 3 8 4 5 3 8 K L M 18 1 16 7 3 4 17 7 8 15 7 8 9 29 32 10 1 16 20 13 32 5 13 16 5 13 16 5 13 16 5 13 16 19 9 16 22 5 32 15 11 1 8 15 11 1 8 1 G 6 6 15 16 7 8 3 16 7 8 3 16 7 8 3 16 1 3 1 2 2 5 2 5 2 5 1 4 eornjooe sg p yyturo s loq ay yeulqeo p pu xq JHXS 6 m Aiddng JOH ureejg 68 0 SHUN B Y jou ureojs 104 88 9 AHTS lou esn SPUN sep 104 AHAS erg 8 0 9104 asn 3894 514393 022 802 104 4 45 8830N pun ASIA pug 9ougrjug 8 1 T AN JJ
94. 4T7 and solenoid 4L9 on the inter mittent pilot valve At that point 4U18 gives electrode 4E1 approximately 10 seconds to establish a pilot flame The presence of this flame is proven by flame rod 4U19 4018 does not detect a pilot flame at the end of this pe riod it will shut down and lock out the ignition combustion circuit If the pilot is ignited within 10 seconds the IC board de en ergizes the ignition transformer 4T7 and electrode 4E1 At this point relay 4K119 will energize starting the combus tion air actuator and the furnace The feedback signal from the discharge temperature sensor will cause the modulating output from the heat module to change the damper position as required to maintain the outlet temperature within the de sired band Flame Failure In the event that IC board 4U18 loses the proof of flame input signal during furnace operation it will make one at tempt at reignite If a flame is not reestablished within the 10 second trial period 4U18 will shut down and lock out the ignition combustion control circuit Combustion blower mo tor 4B11 continues to run as long as a heating requirement exists and control circuit switch 4S24 is ON Once locked out on flame failure the IC board will not reac tivate the ignition combustion control circuit until it is reset manually To do this press the reset button on the front of the IC board case 57 of relay contacts available for ex
95. 5 Exhaust Airflow Measurement 66 TraqTM Sensor Airflow Measurement 66 Economizer Damper Adjustment 80 Compressor 2 82 Compressor Operational Sounds 83 Thermostatic Expansion Valves 93 Charging by 93 Low Ambient 21 111 93 Electric Steam and Hot Water Start Up 94 Gas Furnace Start Up 94 Two Stage Gas 95 Full Modulating Gas Furnace 97 Limited Modulating Gas Furnace 98 Final Unit 2 99 Section Five Service amp 100 Fan Belt 21 2 2 1 104 Scroll Compressor Replacement 105 VFD Programming Parameters 106 Monthly 107 s 107 Cooling 107 Heating 108 Coil Cleaning 108 Final Process 2r nu EU 109 Index e np
96. 5 43 678 5 68 702 5 95 726 6 29 752 6 91 13 000 659 6 09 679 6 44 699 6 76 720 7 04 741 731 Note Blocked areas identify non standard motor selections 90 through 130 Ton 50 Modulating Exhaust Fan Performance CFM Negative Static Pressure STD 0 250 W G 0 500 W G 0 750 W G 1 000 W G 1 250 W G 1 500 W G AIR RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 12 000 452 3 68 495 421 536 485 576 546 614 6 17 651 6 95 14 000 516 571 551 621 586 6 85 622 7 63 657 8 36 690 909 16 000 583 841 609 885 643 957 672 10 29 704 11 18 _ 735 12 07 18 000 650 11 88 672 1229 699 1294 729 13 79 755 14 59 20 000 718 16 20 737 16 62 758 17 18 785 18 03 811 18 97 Negative Static Pressure STD 1 750 W G 2 000 W G 2 250 W G 2 500 W G AIR RPM BHP RPM BHP RPM BHP RPM BHP 12 000 687 7 73 722 855 759 9 46 1797 10 45 14 000 723 9 96 754 10 88 785 11 79 815 12 72 16 000 764 12 84 793 13 72 822 14 72 850 18 000 811 16 62 838 17 53 864 1841 889 19 39 20 000 859 20 87 885 2205 910 23 18 934 Note Blocked areas identify non standard motor selections 79 Economizer Damper Adjustment Exhaust Air Dampers Verify that the exhaust dampers if equipped close tightly when the unit is off Adjust the damper linkage as necessary to ensure proper closure An access panel is provided un der each damper assembly Fresh Air amp Return Air Damper Operation The fresh air and return air damper linkage is accessible from the filter sect
97. 56 152 00 smooth S HG DT3 Evaporator 38 0 5 5 148 60 40 Hi Cap Evaporator n a n a n a n a n a n a Condenser waw 3B 0 3 5 4 156 152 00 smooth 103 Fan Belt Adjustment The supply fan belts and optional exhaust fan belts must be inspected periodically to assure proper unit operation Replacement is necessary if the belts appear frayed or worn Units with dual belts require a matched set of belts to ensure equal belt length When removing or installing the new belts do not stretch them over the sheaves Loosen the belts using the belt ten sion adjustment bolts on the motor mounting base Once the new belts are installed using a Browning or Gates tension gauge or equivalent illustrated below ad just the belt tension as follows Force Scale Small O Ring 25525050506 RS kx 55 Ke Span Scale O Ring 104 Service amp Maintenance Continued A warnine Hazardous Voltage Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvert ently energized Failure to disconnect power before ser vicing could result in death or serious injury 1 determine the appropriate belt deflection a Measure the center to center shaft distance in inches between the fan and motor sheaves b Divide the distance measured in Step 1a by 64 the
98. 58 0 58 731 0 73 797 0 90 856 1 08 3 000 435 0 36 522 0 51 614 0 67 694 0 88 765 1 11 830 1 34 886 1 54 4 000 529 0 76 592 0 86 654 1 03 728 1 29 797 151 861 1 77 919 2 05 5 000 623 132 687 156 735 1 67 778 1 79 836 2 13 896 245 953 2 72 6 000 722 2 13 779 2 47 830 2 72 870 2 86 905 2 96 944 3 16 994 3 59 7 000 924 323 874 364 922 4 02 965 4 30 1000 4 48 1032 4 59 1062 4 72 S HF C40 3 000 288 0 22 393 0 38 477 0 55 547 074 611 0 94 668 1 16 721 1 39 5 000 372 0 66 430 0 83 495 1 05 557 129 621 157 680 1 87 732 2 16 7 000 472 155 522 1 82 563 2 04 606 229 653 259 698 291 742 324 9 000 578 3 06 621 341 661 3 76 695 4 06 725 4 34 758 4 65 794 5 01 11 000 688 536 725 5 80 760 6 24 793 6 66 822 7 06 850 7 42 875 7 76 S HF C50 3 000 288 0 22 393 0 38 477 0 55 547 074 611 0 94 668 1 16 721 1 39 S HF C55 5 000 372 0 66 430 0 83 495 1 05 557 129 621 1 57 680 1 87 732 2 16 7 000 472 155 522 182 563 2 04 606 229 653 2 59 698 2 91 742 3 24 9 000 578 3 06 621 341 661 3 76 695 4 06 725 4 34 758 465 794 5 01 11 000 688 536 725 5 80 760 6 24 793 6 66 822 7 06 850 7 42 875 7 76 S HF C60 4 000 271 0 29 364 0 54 438 0 82 499 1 07 550 1 30 601 1 56 651 1 87 S HF C70 6 000 339 0 71 391 0 90 456 1 22 517 1 60 572 2 01 622 243 668 2 85 S HF C75 8 000 425 1 55 460 1 73 497 1 96 542 230 591 2 72 639 3 20 684 3 73 10 000 517 2 88 543 3 13 571 334 600 3 59 632 3 94 668 4 37 707 4 87 12 000 612 484 633 515 655
99. 6 27 3 178 21 8 143 Condenser Fans Total FLA 1 Total FLA 1 Total FLA 1 Total FLA 1 20 Ton 2 fans 8 2 8 2 3 6 2 8 25 30 Ton 3 fans 12 3 12 3 5 4 4 2 40 Ton 4 fans 16 4 16 4 7 2 5 6 50 75 Ton 6 fans 24 6 24 6 10 8 8 4 90 Ton 8 fans 32 8 32 8 14 4 11 2 105 amp 115 Ton 10 41 41 24 14 fans 130 Ton 12 fans 49 2 49 2 28 8 16 8 Supply Fan Motor FLA ea FLA ea FLA ea FLA ea Horsepower 3 0 HP 10 4 9 4 5 3 8 5 0 HP 16 14 2 7 1 5 8 7 5 24 8 21 6 10 8 8 6 10 0 30 6 26 6 13 3 10 6 15 0 2 44 9 40 20 15 6 20 0 2 57 5 51 25 5 20 5 25 0 2 75 65 32 5 26 30 0 2 81 74 37 31 40 0 2 121 105 8 52 9 42 4 Exhaust Fan Motor FLA FLA FLA FLA Horsepower 1 5 HP 5 5 4 8 2 4 1 9 3 0 HP 10 4 9 4 5 3 8 5 0 HP 16 14 2 7 1 5 8 7 5 HP 24 8 21 6 10 8 8 6 10 0 HP 30 6 26 6 13 3 10 6 15 0 HP 44 9 40 20 15 6 20 0 HP 57 5 51 25 5 20 5 25 HP 75 65 32 5 26 30 HP 81 74 37 31 40 HP 121 105 8 52 9 42 4 Notes 1 Full load amp values represents the total condenser fan amps 2 Two 2 motors are used on 90 through 130 Ton units 41 Table 3 7 Continued Electrical Service Sizing Data 20 through 130 Ton Unit 200 60 Nominal 230 60 3 Nominal 460 60 3 Nominal 575 60 3 Nominal Component s 180 220 Utiliz 207 253V Utiliz 414 506V Utiliz 517 633 Utiliz Electric Heat FLA 3 FLA 3 FLA 3 3 Only 30 83 3 72 2 36 1 28 9 50 138 8 120 3 60 1 48 1 70
100. 60 65 70 75 80 85 90 95 100 SUCTION PRESSURE PSIG To Check Operating Pressures 1 Start the unit and allow the pressures to stabilize 4 Plot the outdoor dry bulb temperature and the 2 Measure the outdoor air dry bulb temperature F operating suction pressure psig onto the chart entering the condenser coil 5 At the point of intersection read to the left for the 3 Measure the discharge and suction pressure psig discharge pressure The measured discharge next to the compressor pressure should be within 7 psig of the graph 92 Thermostatic Expansion Valves The reliability and performance of the refrigeration system is heavily dependent upon proper expansion valve adjust ment Therefore the importance of maintaining the proper superheat cannot be over emphasized Accurate measure ments of superheat will provide the following information 1 How well the expansion valve is controlling the refriger ant flow 2 The efficiency of the evaporator coil 3 The amount of protection the compressor is receiving against flooding or overheating The recommended range for superheat is 10 to 16 degrees at the evaporator Sys tems operating with less than 10 degrees of superheat a Could cause serious compressor damage due to refrigerant floodback b Removes working surface from the evaporator normally used for heat transfer Systems operating with superheat in excess of 16 degrees a Could cause excessive compresso
101. 619 1 81 10 000 640 2 79 712 3 25 12 000 737 4 44 806 5 22 14 000 837 6 67 640 675 711 767 860 1 08 1 65 2 48 3 48 5 64 730 765 797 837 905 1 45 2 22 3 01 4 26 5 89 811 845 876 911 956 1 87 2 78 3 66 5 04 6 49 882 912 947 980 2 34 3 27 4 40 5 70 947 975 1013 1045 2 88 3 77 5 18 6 46 1017 1036 1075 1106 3 55 4 30 5 94 7 31 40 7 500 334 0 75 438 121 9 000 362 1 09 449 1 57 12 000 435 2 19 496 2 70 14 000 486 3 22 542 3 86 16 000 537 4 55 592 5 35 9 000 362 1 09 449 1 57 12 000 435 2 19 496 2 70 15 000 511 3 85 567 4 56 18 000 590 6 21 642 7 16 20 000 644 8 26 692 9 35 S HF C50 535 536 563 594 563 614 685 735 1 77 2 16 3 35 4 47 3 35 5 18 7 97 10 33 616 618 628 653 628 667 724 772 2 35 2 84 4 04 5 25 4 04 5 96 8 69 11 17 686 689 693 707 693 720 766 807 2 98 3 52 4 83 6 04 4 83 6 80 9 54 11 97 750 753 757 763 812 844 3 64 4 24 5 71 6 91 10 54 12 91 809 817 819 856 885 4 34 864 867 873 874 5 06 5 77 8 53 8 89 6 63 7 86 867 873 876 898 926 5 77 7 53 9 63 12 56 15 13 11 55 14 00 S HF C55 Mo 386 1 40 463 1 90 13 000 461 2 67 518 323 16 000 537 4 55 592 5 35 19 000 617 7 19 667 821 21 500 685 10 08 731 11 26 540 578 636 710 772 2 48 3 88 6 00 9 10 12 36 618 639 683 74
102. 620 10010 610 640 10370 10690 11160 10560 610 640 75 10370 10690 11160 10560 610 640 C90 15460 16050 15240 770 011 15950 16590 15810 770 012 16380 17010 16220 770 013 16730 17380 16580 770 Note 1 The weights shown this table represents the typical unit operating weights for the heating cooling function indicated with an econom 2 The weights shown represents the typical unit operat izer and exhaust fan installed ing weights for the heating cooling function indicated with an economizer exhaust fan with supply amp exhaust VFD installed 3 Roof curb weights include the curb and pedestal Roof Curb and Ductwork The roof curbs for 20 through 130 Ton units consists of two main components a pedestal to support the unit s con denser section and a full perimeter enclosure to support the unit s air handler section Before installing any roof curb verify 1 That it is the correct curb for the unit 2 That it includes the necessary gaskets and hardware 3 That the purposed installation location provides the required clearance for proper operation 4 Insure that the curb is level and square The top surface of the curb must be true to assure an adequate curb to unit seal Step by step curb assembly and installation instructions ship with each Trane accessory roof curb kit Follow the in structions carefully to assure proper fit up when the unit is set into place 22 Note To assure proper condensate
103. 7 809 3 18 4 61 6 74 9 87 13 38 691 698 735 785 842 3 94 5 39 7 64 10 68 14 20 755 759 783 827 874 4 70 6 26 8 53 11 66 15 08 814 818 831 870 910 5 48 8 22 9 47 12 73 16 10 869 874 880 911 948 6 30 8 21 10 48 13 80 17 28 S HF C60 12 000 351 1 49 423 2 09 502 3 00 572 4 02 634 5 07 690 6 09 740 7 04 784 7 91 70 amp 75 15 000 412 2 68 460 3 15 521 3 96 585 5 02 646 6 24 702 7 53 754 8 83 801 10 14 18 000 478 4 41 516 4 88 557 5 54 607 649 662 7 66 715 9 01 766 10 48 814 12 01 21 000 547 6 75 578 7 36 612 7 92 647 8 71 688 9 77 735 11 03 781 12 46 827 14 03 24 000 617 9 83 644 10 59 672 11 22 702 11 88 732 12 77 766 13 89 805 15 22 Note Blocked areas table identify nonstandard drive selections 78 Table 4 4 20 through 75 50 Modulating Exhaust Fan Performance Negative Static Pressure 0 20 W G 0 40 0 60 W G 0 80 W G 1 00 W G 1 20 W G 1 40 W G Std Air RPM BHP RPM RPM BHP RPM BHP RPM RPM BHP RPM S HF C20 2 000 364 0 17 487 0 30 582 045 658 0 58 731 0 73 797 0 90 856 1 08 S HF C25 3 000 435 0 36 522 0 51 614 0 67 694 0 88 765 1 11 830 1 34 886 1 54 4 000 529 0 76 592 0 86 654 1 03 728 1 29 797 1 51 861 1 77 919 2 05 5 000 623 132 687 156 735 167 778 179 836 213 896 245 953 2 72 6 000 722 213 779 247 830 2 72 890 2 86 905 2 96 S HF C30 2 000 364 0 17 487 0 30 582 045 6
104. 70 C75 Dual 22 X 22 Fans Entrance Losses without Inlet Guide Vanes without Evap Coil without Filters without Return Air Dampers without Exhaust Fan Curve Limits Minimum Motor HP 10 Maximum Motor HP 40 Maximum RPM 1130 Maximum CFM C60 27 000 C70 amp C75 30 000 Maximum Static Pressure Leaving the Unit 4 0 w c Figure 4 2 Continued 90 105 115 amp 130 Ton Supply Fan Performance without Inlet Guide Vanes Static Presure Inches w c 9 0 10000 20000 30000 40000 50000 60000 CFM 69 4 3 Wet Airside Pressure Drop at 0 075 Ib cu ft 20 through 60 Standard Evaporator Coil Wet Airside Pressure Drop at 0 075 Ib cu ft 20 60 Ton Standard Evaporator Coil 0 7 0 6 0 5 0 4 0 3 0 2 0 1 0 09 0 08 Airside Pressure Drop Inches H 0 0 07 0 06 0 05 4000 5000 6000 7000 8000 9000 10000 20000 30000 Unit Airflow Dry Airside Pressure Drop at 0 075 Ib cu ft 20 through 60 Ton Standard Evaporator Coil Dry Airside Pressure Drop at 0 075 Ib cu ft 20 60 Ton Standard Evaporator Coil 0 7 0 6 0 5 0 4 0 3 0 2 0 09 0 08 0 07 Airside Pressure Drop Inches H 0 0 06 0 05 0 04 3000 4000 5000 6000 7000 8000 9000 10000 20000 30000 Unit Airflow CFM 70 Figure 4 3 Continued Wet Airside Pressure Drop at 0 075 Ib cu ft 70 through 130 Ton Sta
105. 8 Electrical Phasing u uuu uuu u uu a 59 Voltage Supply and Voltage Imbalance 60 Service Test Guide for Component 61 Verifying Proper Fan Rotation 63 If all of the fans are rotating backwards 63 System Airflow Measurements 63 Constant Volume Systems 63 Variable Air Volume Systems 65 Exhaust Airflow Measurement 66 TraqTM Sensor Airflow Measurement 66 Economizer Damper Adjustment 80 Compressor Start Up 82 Compressor Operational Sounds 83 Thermostatic Expansion Valves 93 Charging by Subcooling 2 93 Low Ambient 8040121 93 Electric Steam and Hot Water Start Up 94 Gas Furnace 94 Two Stage Gas Furnace 95 Full Modulating Gas 97 Limited Modulating Gas Furnace 98 Final Unit
106. 8 1 1 2 SHLI 78 Surjeuruue 00 prey epou 8 8 3e Sura 1 8 1 1 V a OT esn 80114091A g _ V S8320V EN amp eseg VUN HOSS3HdWOO f TANVd TOULNOD 31VSNX NOO 18 ONILVINGOW 001 15 09 15 PNILVINGOW 001 SDIVLNI VI esq Ieuorsu urq yun uo GZ nay 02 SHUN 2 4HvS Ve e 16 3 1 Unit Dimensional Data Unit Size 20 amp 25 Ton 30 Ton 40 Ton 50 amp 55 Ton 60 Ton 70 amp 75 Table 3 1 6 1 5 8 5 3 1 8 6 1 5 8 98 Unit Base Dimensional Data Unit Size 20 30 Ton 40 55 Ton 60 Ton 70 75 Ton Table 3 1C A 14 0 1 4 16 7 13 16 16 7 13 16 16 7 13 16 Electrical Entrance Data Unit Size 20 25 amp 30 50 amp 55 Ton 40 60 70 amp 75 Ton 8 7 32 8 3 4 2 2 1 2 2 5 2 5 2 5 7 6 1 2 7 6 1 2 11 3 4 11 3 4 1
107. 81 47 32 73 39 49 27 45 16 16 05 1 17 1 23 23 26 28 000 95 73 1 19 92 54 33 85 44 55 32 50 17 17 06 1 22 1 29 130 130 31 000 1 12 87 1 40 1 08 60 40 1 04 49 61 39 55 21 21 07 37 36 33 000 1 24 96 1 55 1 20 65 46 1 18 52 67 44 60 24 24 08 42 40 76 Table 4 2 Continued 90 through 130 Ton Component Static Pressure Drops Inches W C Evaporator Coil Heating System Filters Econ High Throwaway Perm Bag Cartridge Std With Or Nom STD Std Capacity SFHF G SEHFIG SLHFG 55 Std High Wire And Roof Without Tons AIR Wet Dry Wet Dry Low High All KW s Low High Low High Fiber Effic Mesh Prefilter Prefilter Curb Exh Fan 27 000 40 31 567 51 25 13 26 31 22 32 11 13 68 65 20 32 000 53 41 89 68 31 16 35 41 30 43 14 16 84 84 31 90 37 000 67 52 1 12 86 39 23 45 52 40 55 17 19 1 02 1 04 41 42 000 82 63 1 36 1 06 46 29 56 65 50 68 21 22 1 19 1 06 52 45 000 92 71 1 53 1 19 N A 52 32 63 73 58 76 24 24 63 31 000 56 45 84 64 28 17 33 39 29 40 32 80 222 35 000 68 54 1 02 78 36 21 41 48 36 50 16 96 96 32 105 39 000 81 65 121 94 42 26 49 57 44 60 19 1 09 1 12 44 43 000 94 76 1 42 1 10 N A 45 30 57 66 53 71 22 122 1 30 54 46 000 1 05 84 1 58 1 23 55 34 65 75 61 79 24 64 31 000 84 64 N A 28 17 33 39 29 40 82 80 22 115 35 0
108. 9 3357 LG uo 01 056 mas 434 4 SNOTLYIINANNOD 3313WOILN3L0d m NOILISOd ees vec WOWINIM 310WN34H o2ns 0 206 512 1 02 3 3qQ0N 4 XILT PER SEE z2 4 806 11 MOSN3S 606 1 S19VLNOD MV pt T 3qISInO r H Ho 4 2835 TWNOILdO lt E eiye 1 SLOVLNOD 8 3Q0N 179170 S glia ru 3OIS83A0 NOLLV ILIN3A lt WO2 2vS 3 EN E og 1 ro Pm 1V3H 5 9 ON prs M I ONILV INGOW YO lt SvS iV3H JN 9vS 1 1 1 1 1 1 l 1 1 1 1 1 aui OA 2 6 1 1 1 1 1 i 626 ON l erp lt AVA lt 87 I l es ON lt 22 i bod 1 1 ae E OVA vv OO Wavy e __ hi 30D333A0 NOILYTILNIA ED Su 3QINN3AO NOILVTILN3A 68536 jl p suondo 5 AVA UOL 081 uBnoiu1 Og 10
109. After greasing the bearings check the setscrews to ensure that the shaft is held securely to the bearings and fan wheels Make sure that all bearing supports are tight Check the supply fan belt s If the belts are frayed or worn replace them Refer to the Fan Belt Adjustment section for belt replacement and adjustments 107 Check the condition of the gasket around the control panel doors These gaskets must fit correctly and be in good condition to prevent water leakage Verify that all wire terminal connections are tight Remove any corrosion present on the exterior surfaces of the unit and repaint these areas Generally inspect the unit for unusual conditions e g loose access panels leaking piping connections etc Make sure that all retaining screws are reinstalled in the unit access panels once these checks are complete 1 With the unit running check and record the ambient temperature compressor oil level each circuit compressor suction and discharge pressures each circuit superheat and subcooling each circuit Record this data on an operator s maintenance log like the one shown in Table 5 8 If the operating pressures in dicate a refrigerant shortage measure the system super heat and system subcooling For guidelines refer to Charging by Subcooling Note Do Not release refrigerant to the atmosphere If adding or removing refrigerant is required the service technician
110. Air Temperature Sensor 3RT6 Is an analog input device used with a return humidity sen sor on CV amp VAV applications when the comparative en thalpy option is ordered It monitors the return air tempera ture and compares it to the outdoor temperature to estab lish which temperature is best suited to maintain the cooling requirements It is mounted in the return air section and is connected to the ECEM 1U52 Evaporator Temperature Sensor 3RT14 and 3RT15 Is an analog input device used with CV amp VAV applications It monitors the refrigerant temperature inside the evaporator coil to prevent coil freezing It is attached to the suction line near the evaporator coil and is connected to the SCM MCM 1U49 It is factory set for 30 F and has an adjustable range of 25 F to 35 F The compressors are staged Off as necessary to prevent icing After the last compressor stage has been turned Off the compressors will be allowed to restart once the evaporator temperature rises 10 F above the coil frost cutout temperature and the minimum three minute Off time has elapsed Filter Switch 3521 Is a binary input device used on CV amp VAV applications It measures the pressure differential across the unit filters It is mounted in the filter section and is connected to the RTM 1U48 A diagnostic SERVICE signal is sent to the remote panel if the pressure differential across the filters is at least 0 5 w c The contacts will automatica
111. BY THE CUSTOMER IN ACCORDANCE WITH LOCAL ELECTRICAL CODES lt 2 CUSTOMER CONNECTIONS MAIN UNIT CONTROL CIRCUIT 1 ARE LOCATED THE CONDENSER SECTION FOR 20 THRU 75 TON UNITS CUSTOMER CONNECTIONS FOR 90 THRU 130 TON UNITS ARE LOCAT HEATING SECTION D IN THE SEE CUSTOMER CONNECTION WIRE RANGE TABLE FOR ACCEPTABLE WIRE SIZES FOR CONNECTION TO MAIN UNIT TERMINAL BLOCK 1TB1 4TB2 OR DISCONNECT SWITCH 1514 4515 WIRES TO THE OPTIONAL STEAM AND OR HOT WATE THE UNIT WIRE CONNECTIONS TO THE VALVE TO B 12 HEAT VALVE ARE SUPPLIED WITH MADE BY THE CUSTOMER OPTIONAL 5057 REMOTE ZONE TEMP SENSOR IS USED FOR REMOTE ZONE TEMP SENSING WHEN 5069 REMOTE ZONE TEMP SENSOR IS USED REMOVE 51 58 INTERGRAL ZONE TEMP SENSOR ATTACHED TO TERMINALS 51 AND 52 WIRES USE SHIELDED TWISTED PAIR WIRE USE SHIELDED TWISTED PAIR WIRE WRAP SHIELDS WITH TAPE TO PREVENT CONTACT WITH GROUND REMOVE JUMPER 1TB4 15 4 4 16 AND INSTALL HIGH DUCT TEMP T STAT amp OR FIELD SUPPLIED DEVICE REMOVE JUMPER 1TB4 17 amp 1 4 18 WHEN FIELD SUPPLIED EXTERNAL AUTO STOP SWITCH 5S67 IS INSTALLED ALARM OUTPUT SWITCHES ON ANY MANUAL RESET DIAGNOSTIC OPTIONAL HEAT MODULE AUX TEMP 5 16 IS USED FOR MORNING WARM UP CONTROL
112. Closed Closed 0 Default 2A Off 2B On 130 Ton 1A 2B3 2B14 1A On 1B Off Closed Closed 0 Default 2A Off 2B Off 1B 2B1 2B2 1A Off 1B On Closed Closed 0 Default 2B19 2B20 2A Off 2B Off 2A 2B6 2B13 1A Off 1 B Off Closed Closed 0 Default 2A On 2B Off 2B 2B4 2B5 1A Off 1 B Off Of Closed Closed 0 Default 2B15 2B21 Open EXHAUST FAN Off On All Off Off 100 Default Open GAS HEAT Closed Closed 100 Unocc Stage 1 On Off WA Closed Closed 100 Stage 2 Off On WA Closed Closed 100 Full Modulating Closed Closed 100 Unocc High Fire Adjustment Full Modulating Closed Closed 100 Unocc Low Fire Adjustment Limited Modulating Closed Closed 100 Unocc High Fire Adjustment Limited Modulating Closed Closed 100 Unocc Low Fire Adjustment ELECTRIC HEAT Closed Closed 100 Unocc Stage 1 Closed Closed 100 Stage 2 Closed Closed 100 Stage 3 All Off Closed Closed 100 Unocc Hydronic Heat All Off Closed Closed 0 Default All Off Closed Closed 0 Default Fresh Air Dampers All Off Closed 0 Default Exhaust Dampers Off Off 10096 Closed 0 Default O Compressors for the 20 thru 60 Ton units can operate individually or together and any order while the SERVICE TEST mode Compressors 1A amp 1B and compressors 2A amp 2B operate sim
113. D displays the Start test screen Press the key to designate the delay before the test is to start This service test will begin after the TEST START key is pressed and the delay desig nated in this step has elapsed Press the ENTER key to confirm this choice A warninc Rotating Components Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvert ently energized Failure to disconnect power before ser vicing could result in death or serious injury 7 Press the TEST START key to start the test Remember that the delay designated in step 6 must elapse before the fan will begin to operate 8 With the fresh air dampers fully closed and the supply fan operating at 100 airflow requirements measure the return static pressure at the location determined in step 1 9 Press the STOP key at the Human Interface Module in the unit control panel to stop the fan operation 10 Open the field supplied main power disconnect switch upstream of the rooftop unit Lock the disconnect switch in the Open position while working on the dampers 11 Compare the static pressure reading to the static pres sure ranges and linkage positions in Table 4 5 for the unit size and operating CFM Unit Start Up Continued To relocate the fresh air return air connecting rod to balance 15 Reattach the drive rod and swivel to th
114. Generic Building Automation System Module GBAS Optional 1U51 used with non Trane building control systems The Generic Building Automation System GBAS module allows a non Trane building control system to communicate with the rooftop unit and accepts external setpoints in form of analog inputs for cooling heating supply air pressure and a binary Input for demand limit Refer to the Field In stalled Control Wiring section for the input wiring to the GBAS module and the various desired setpoints with the corresponding DC voltage inputs for both VAV and CV ap plications General Information Continued For complete application details of the module refer to En gineering Bulletin RT EB 109 Input Devices amp System Functions The descriptions of the following basic Input Devices used within the UCM network are to acquaint the operator with their function as they interface with the various modules Refer to the unit s electrical schematic for the specific mod ule connections Constant Volume amp Variable Air Volume Units Supply Air Temperature Sensor 3RT9 Is an analog input device used with CV amp VAV applications It monitors the supply air temperature for supply air tem perature control VAV supply air temperature reset VAV supply air temperature low limiting CV supply air temper ing CV VAV It is mounted in the supply air discharge sec tion of the unit and is connected to the 1048 Return
115. Line to the Furnace Gas DN Flue Assembly Installation Hot Water Heat Units SLH Steam Heat Units _ Disconnect Switch External Handle Electric Heat Units _ Main Unit Power Wiring 2 Disconnect Switch Sizing 055 Field Installed Control Wiring Controls using 24 VAC Controls using DC Analog Input Outputs Constant Volume System Controls Variable Air Volume System Controls Constant Volume or Variable Air Volume System COMMONS RE Table of Contents Section Four te S ea ee SE 55 Cooling Sequence of Operation 55 Gas Heating Sequence of 56 Fenwal Ignition System see 56 Honeywell Ignition 56 Modulating Gas Sequence of Operation 57 Flame Failure sa u a au 57 Electric Heat Sequence of Operation 58 Wet Heat Sequence of Operation 5
116. NNECT STEAM OR HOT WATER VALVE AS 4 SHOWN WHEN REQUIRED HYDRONIC HEAT ACTUATOR 36AL Table 3 7 Electrical Service Sizing Data 20 through 130 Unit 200 60 3 Nominal 230 60 3 Nominal 460 60 3 Nominal 575 60 3 Nominal Componeni s 180 220V Utiliz 207 253V Utiliz 414 506V Utiliz 517 633V Utiliz RLA ea LRA ea RLA ea LRA ea RLA ea LRA ea RLA ea LRA ea Compressor 20 A amp B 41 9 269 41 9 251 18 2 117 14 6 94 25 B 62 8 409 62 8 376 27 3 178 21 8 143 41 9 269 41 9 251 18 2 117 14 6 94 30 amp 62 8 409 62 8 376 27 3 178 21 8 143 40 1 2 1 2 41 9 269 41 9 251 18 2 117 14 6 94 50 1B amp 2B 62 8 409 62 8 376 27 8 178 21 8 143 4 2A 41 9 269 41 9 251 18 2 117 14 6 94 55 1 2 1 28 62 8 409 62 8 376 27 3 178 21 8 143 60 1 2 1 28 62 8 409 62 8 376 27 3 178 21 8 143 70 1 2 1 28 41 9 269 41 9 251 18 2 117 14 6 94 1 26 62 8 409 62 8 376 27 3 178 21 8 143 75 1 2 1 2 41 9 269 41 9 251 18 2 117 14 6 94 1 26 62 8 409 62 8 376 27 3 178 21 8 143 75 1 2 1 2 41 9 269 41 9 251 18 2 117 14 6 94 1 20 62 8 409 62 8 376 27 3 178 21 8 143 90 1 2 41 9 269 41 9 251 18 2 117 14 6 94 1 2 amp 62 8 409 62 8 376 27 3 178 21 8 143 1 2 105 1 2 62 8 409 62 8 376 27 3 178 21 8 143 1 2 1 2 115 1 2 amp 62 8 409 62 8 376 27 3 178 21 8 143 1 2 1 2 amp 41 9 269 41 9 251 18 2 117 14 6 94 1 20 130 1 2A B C D 62 8 409 62 8 37
117. ONCTEURS SITUES A DISTANCE AVANT D EFFECTUER L ENTRETIEN FAUTE DE DECONNECTER LA SOURCE ELECTRIQUE AVANT D EFFECTUER L ENTRETIEN PEUT ENTRAINER DES BLESSURES CORPORELLES SEVERES OU LA MORT ZONE RESET OPTION DISCONNECT ALL ELECTRIC POWER INCLUDING REMOTE DISCONNECTS BEFORE SERVICING FAILURE TO DISCONNECT POWER BEFORE SERVICING CAN CAUSE SEVERE PERSONAL INJURY OR DEATH DEVICE PREFIX LOCATION CODE LOCATION INSIDE UNIT CONTROL BOX 5571 T 435 431 CONDENSER SECTION 1 J MM 537 I 416 8 417 1 4415 403 1 D r 418 1 i COMM P7 aue POPE 24 VAC 14b T 403 1 1 5058 REMOTE PANEL H 5 Refer to Wiring Notes page 51 52 STOP SWITCH 9 7 4 p 1 Qal CAUTION USE COPPER CONDUCTORS ONLY UNIT TERMINALS ARE NOT DESIGNED TO ACCEPT OTHER TYPES OF CONDUCTORS FAILURE TO DO SO MAY CAUSE DAMAGE TO THE EQUIPMENT 5567 EXTERNAL AUTO STOP SWITCH 0 lt MER p 4 434 438 1 Wapa 437 d m L 4 4 438 I SK86 OCCUPIED 44 3 77 94 1 SB REMOTE HUMAN INTERFACE MODULE J1 2 J2 1 J2 2 EARTH T GROUND 230
118. ONTROL POWER FUSE 0 25 0 30 CONTROL 171 TRANSFORMER RATING 20 30 TON CONDENSER FAN FUSE 1 1 THRU 1 6 CLASS RKS 0 50 KVA 1 7 S 50 60 70 130 CLASS 5 ELECTRIC HEAT FUSE 4F19 THRU 4F36 4F46 47 48 COMPRESSOR PROTECTION FUSE TRANSFORMER CIRCUIT FUSE 1 44 amp 1 45 1 72 THRU 1 74 FLO 7 5 10 20 25 30 VOLTAGE STANDARD MOTORS 175A 225A 225A FUSE RATING 1 5 HP 3 HP 150A 200A 225A seo sox asa son ase wn OPTIONAL EXHAUST FAN CIRCUIT FUSES 20 THRU 130 TON 1 63 1 65 CLASS T FUSES UNIT Gor c 1 5 HP 5 7 5 HP 10 15 20 25 HP 30 HP 40 HP 1004 125A 175A 225A 225A 350A 125A 150A 175A 225A 300A 110A 200v 60 3 6 230v 60 3 eoov N A 460 60 3 600 125A 150A 5 5 3 eov 101 200 60 3 230 60 3 380 50 3 415 50 3 460 60 3 575V 60 3 15 FUSE REPLACEMENT IS REQUIRED FOR 50 THRU 60 0 50 TRANSFORMER WITH 200V 230V 460V 575V UNIT VOLTAGE 20A FUSE REPLACEMENT IS REQUIRED FOR 50 THRU 60 0 50 KVA TRANSFORMER WITH 380V OR 415V UNIT VOLTAGE OPTIONAL CONVENIENCE OUTLET FUSE 1 55 AND 1 56 TIME DELA
119. ORT INSIDE UNIT CONTROL BOX CONDENSER SECTION AIR HANDLER SECTION HEATING SECTION EXTERNAL FIELD MOUNTED DEVICE ZONE TEMP SENSOR 5058 REMOTE PANEL L wi nse DEVICE PREFIX LOCATION CODE LOCATION HEATING SETPOINT Refer to Wiring Notes on page 51 49 I r ao iJ m Rcs a CAUTION USE COPPER CONDUCTORS ONLY UNIT TERMINALS ARE NOT DESIGNED TO ACCEPT OTHER TYPES OF CONDUCTORS FAILURE TO DO SO MAY CAUSE DAMAGE TO THE EQUIPMENT 5571 EMERGENCY STOP SWITCH EXTERNAL AUTO STOP 9 7 0 el 0 434 438 435 431 I J Roque epos T 4 3 LOAST 438 LA Eg L 04 4 3 77 5 7 41 1 las 538 24 2 INTERFACE MODULE 403 92 41 92 2 EARTH T GROUND 2309 3356 02 6 6 IN 9vs l1V3H 1ndino AV 133 SGOW lV3H 1 SNOLLYDINAWAOD ia N313A0I1N310d Ges ves MNT s 310N3M 1 d 0275 i uu waits 22 pu 7696 1 DN TUUM I 1 ON Trs bg pw 18810 4 NOD E
120. RVE Based on Indoor Airflow of 400 CFM Ton FULL LOAD 380 360 105 F OD Ambient 3 0 320 95 F OD Ambient 2 300 hi 280 85 F OD Ambient 260 lt 75 F OD Ambient 5 240 220 65 Ambient 200 180 50 55 60 65 70 75 80 85 90 95 100 SUCTION PRESSURE PSIG To Check Operating Pressures 1 Start the unit and allow the pressures to stabilize 4 Plot the outdoor dry bulb temperature and the 2 Measure the outdoor air dry bulb temperature F operating suction pressure psig onto the chart entering the condenser coil 5 At the point of intersection read to the left for the 3 Measure the discharge and suction pressure psig discharge pressure The measured discharge next to the compressor pressure should be within 7 psig of the graph 88 Table 4 6 Continued 60 Ton Hi Operating Pressure Curve All Compressors and Condenser Fans ckt 60 Ton Hi Operating Pressure Curve All Compressors and Condenser Fans ckt Cooling Cycle Pressure Curve Based on Indoor Airfow of 400 CFM Ton Full Load 105 F OD Ambient 320 L 300 as sil 95 F OD Ambient 280 9 85 OD Ambi 260 mbien 9 a 240 S 75 F OD Ambient 5 9 220 65 F OD Ambient
121. S TRANE Installation RT SVX10C EN Operation Maintenance Library Service Literature Product Section Unitary Product Rooftop Air Conditioning Comm SZ 20 130 Tons Model SAH SFH_ SLH_ SSH SXH Literature Type Installation Operation Maintenance Sequence 10C Date January 2005 File No SV UN RT RT SVX10C EN 01 05 Supersedes RT SVX10C EN 11 04 INTELLIPAK Commercial Single Zone Rooftop Air Conditioners with CV or VAV Controls 7ZZZZZZZZZZZZZZZZZZZ 2 ZZZZZZZZZZZZZZZZZ7 Models 5 and later Design Sequence SAHF C20 C25 C30 C40 C50 C55 C60 C70 C75 SEHF C20 C25 C30 C40 C50 C55 C60 C70 C75 SFHF C20 C25 C30 C40 C50 C55 C60 C70 C75 SLHF C20 C25 C30 C40 C50 C55 C60 C70 C75 SSHF C20 C25 C30 C40 C50 C55 C60 C70 C75 SXHF C20 C25 C30 C40 C50 C55 C60 C70 C75 X and later Design Sequence Units whose model numbers SXHG C90 D11 D12 D13 SEHG C90 D11 D12 D13 have a 2 in digit 20 are certified SFHG C90 D11 D12 D13 SLHG C90 D11 D12 D13 by the Canadian Standards SSHG C90 D11 D12 D13 Association CSA Units whose model numbers have a 1 in digit 20 are certified by Underwriters Labortory Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice Only qualified technicians should perform the
122. S_HG units is equipped with spring isolators Shipping channels are installed beneath each fan assembly and must be removed To locate and remove these chan nels refer to Figure 3 8 and use the following procedures Rubber Isolators 1 Remove and discard the shipping bolts from the fan as sembly rails Installation Continued 2 Elevate the fan and motor assembly and slide the shipping channels out from between the fan assembly rails and the unit s base rail 3 Lower the fan and motor assembly onto the isolators Make sure that the pins at the top of the isolators are en gaged in the corresponding holes on the fan assembly 4 Verify that the fan assembly is being supported by the iso lators Spring Isolators Spring isolators for the supply and or exhaust fan are shipped with the isolator adjusting bolt backed out Field adjustment is required for proper operation Figure 3 8 shows isolator locations To adjust the spring isolators use the following procedure 1 Remove and discard the shipping tie down bolts but leave the shipping channels in place during the adjust ment procedure See Figure 3 8 2 Tighten the leveling bolt on each isolator until the fan assembly is approximately 1 4 above each shipping channel 3 Secure the lock nut on each isolator 4 Remove the shipping channels and discard 29 3 8 Removing Fan Assembly Shipping Hardware 20 through 75 Note Fan assemblies not
123. See Figure 4 6 Compressor Module sese 7 Compressor Module SCM detects a problem 10 Compressor Motor Winding Thermostats 10 Compressor 83 concealed 14 Condensate Trap Installation 27 See Figure 3 6 Condenser Fan 64 See Figure 4 1 condensing temperature rises above the lower limit 9 Connection Sizes for Hot Water amp Steam 35 See Table 3 5 Constant Volume Systems 63 Constant Volume Zone 46 Control Settings and Time Delays 100 See Table 5 1 Customer Connection Wire Range 40 See Table 3 6 CV Control OptionS u ecce 49 53 See Figure 3 16 Figure 3 17 Index D Damper Adjustment esee 93 See Low Ambient Dampers Damper 94 See Low Ambient Dampers Daytime Warm up 11 DG GConductots tetro ette ee gi Sas 45 See Table 3 9 Dimensional data eese 15 20 See Table 3 1A Table 3 1B Table 3 1C Table 3 2A Table 3 2B Table 3 2C DIP switch settings
124. Verify with an appropriate voltmeter that all capacitors have discharged Failure to disconnect power and dis charge capacitors before servicing could result in death or serious injury Note For additional information regarding the safe dis charge of capacitors see PROD SVB06A EN VFD Programming Parameters Units shipped with an optional variable frequency drive VFD are preset and run tested at the factory If a problem with a VFD occurs ensure that the programmed param eters listed in Table 5 8 have been set before replacing the drive Note Check to make sure that parameter 104 is set to 60 Hz To check parameter 104 press the Extended Menu button press the Left Arrow button until menu Load amp Motor is shown press the up arrow until parameter 104 is displayed Parameter 104 can then be modified by pressing the Change Data button and then the Up Arrow button When the desired selection has been made press the OK button Should replacing the VFD become necessary the placement is not configured with all of Trane s operating parameters The VFD must be programmed before at tempting to operate the unit To verify and or program a VFD use the following steps 1 At the unit turn the 115 volt control circuit switch 1870 to the Off position 2 Turn the 24 volt control circuit switch to the Off position 106 Z warnine Hazardous Voltage Disconnect all electric power including remote discon nects
125. Y TYPE FUSE 101 Service 8 Maintenance Continued Table 5 4 Filter Data Panel Type Filters Bag Type Filters Cartridge Filters Panel Type Prefilters Unit Model Note 1 Note 2 box type Note 2 Note 3 Qty Sizeofeach Qty Sizeofeach Qty Sizeofeach Qty Size ofeach S HF C20 amp 12 20X20X2 4 12 X 24 X 19 4 12 X 24 X 12 4 12X24X2 C25 3 24 X 24 X 19 3 24 X 24 X 12 3 24 X 24 X2 S 0 16 20X20X2 2 12 X 24 X 19 2 12 X 24 X 12 2 12X24X2 6 24 X 24 X 19 6 24 X 24 X 12 6 24 X 24 X 2 S_HF C40 16 20 X 25X2 5 12 X 24X19 5 12 X 24 X 12 5 12 X 24 X 2 6 24 X 24 X 19 6 24 X 24 X 12 6 24 X 24 X 2 S_HF C50 amp 20 20 X25 X 2 3 12 X 24 X 19 3 12 X 24 X 12 3 12 X 24 X 2 C55 9 24 X 24 X 19 9 24 X 24 X 12 9 24 X 24 X 2 S_HF C60 35 16 X 20 X 2 6 12 X 24 X 19 6 12 X 24 X 12 6 12 X 24 X 2 70 75 8 24 X 24 X 19 8 24 X 24 X 12 8 24 X 24 X 2 S_HG C90 amp 25 24 X 24 X 2 3 12 X 24 X 19 3 12 X 24 X 12 3 20 X 24 X 2 S HG D11 15 24 X 24 X 19 15 24 X 24 X 12 15 24 X 24 X 2 S_HG D12 4 25 24 X 24 X 2 3 12 X 24 X 19 3 12 X 24 X 12 3 20 X 24 X 2 S HG D13 15 24 X 24 X 19 15 24 X 24 X 12 15 24 X 24 X 2 Notes 1 Dimensions shown for Panel Type Filters apply to Throw away Cleanable Wire Mesh and High Efficiency Throw away Filters 2 S_HF units ordered with Bag Type Filters or Cartridge Filters box type include a bank of Panel Type Prefilters 3 The same Panel Type Prefilters are used with Bag Typ
126. ace and the unit must be manually reset Refer to the appropriate illustrations in Figure 3 16 or 3 17 for the proper connection terminals in the unit control panel The switch must be rated for 12 ma 24 VDC minimum Occupied Unoccupied Contacts 5K86 To provide Night Setback control if a remote panel with NSB 5U58 was not ordered a field supplied contact 5K86 must be installed This binary input provides the Occupied Unoccupied status information of the building to the RTM It can be initiated by a time clock or a Building Automation System control output The relay s contacts must be rated for 12 24 VDC minimum Refer to the appropriate il lustrations in Figure 3 16 or 3 17 for the proper connection terminals in the unit control panel Demand Limit Relay 5K89 If the unit is equipped with a Generic BAS Module 1U51 i e unit model number digit 21 is a K a normally open N O switch may be used to limit the electrical power us age during peak periods When demand limit is initiated the mechanical cooling and heating operation is limited to either 50 or 100 Demand limit can be initiated by a toggle switch closure a time clock or an ICS control output These contacts must be rated for 12 ma 24 VDC mini mum Outside Air Sensor 3RT3 BAYSENSO16A This device senses the outdoor air temperature and sends this information in the form of an analog input to the RTM It s factory installed on units with
127. al to some roofing materials Care must be taken to protect the roof from oil leaks or spills 4 Pour the cleaning solution into the sprayer If a high pressure sprayer is used a Do not allow the sprayer pressure to exceed 600 psi The minimum spray nozzle angle is 15 degrees b Spray the solution perpendicular at 90 degrees to the coil face c Maintain a minimum clearance of 6 between the sprayer nozzle and the coil 5 Spray the leaving airflow side of the coil first then spray the opposite side of the coil Allow the cleaning solution to stand on the coil for five minutes 6 Rinse both sides of the coil with cool clean water 7 Inspect both sides of the coil if it still appears to be dirty repeat Steps 7 and 8 8 Reinstall all of the components and panels removed in Step 2 then restore power to the unit Steam or Hot Water Coils To clean a steam or hot water coil use a soft brush a steam cleaning machine and water 1 Verify that switches 151 and 1570 are turned OFF and that the main unit disconnect is locked open 2 Remove enough panels and components from the unit to gain sufficient access to the coil 3 Straighten any bent coil fins with a fin comb Use the data in Table 5 5 to determine the appropriate fin comb size 4 Remove loose dirt and debris from both sides of the coil with a soft brush 5 Use the steam cleaning machine to clean the leaving air side of the coil first start a
128. allation operation and maintenance instructions for S HF with 6 and later de sign sequence and S HG with Y and later design se quence with constant volume CV or variable air volume controls About The Manual RT SVX10B EN October 2003 Updated issue of this manual provides specific installation operation and maintenance instructions for S HF with 6 and later design sequence and S HG with Y and later de sign sequence with constant volume CV or variable air vol ume VAV controls RT SVX10A EN May 2003 Updated issue of this manual provides specific installation operation and maintenance instructions for 5 HF with 5 and later design sequence and S HG with X and later de sign sequence with constant volume CV or variable air vol ume VAV controls SXH 9 November 2002 Re issue of manual for minor clarity issues provides specific installation operation and maintenance instructions for 3 and later design sequence on S HF units and W and later design sequence on S HG units with constant volume CV or variable air volume VAV controls SXH 9 June 2002 Original issue of manual provides specific installation op eration and maintenance instructions for 3 and later design sequence on S HF units and W and later design sequence on S HG units with constant volume CV or variable air vol ume VAV controls These units are equipped with electronic Unit
129. allation process It does not replace the detailed instructions called out in the appli cable sections of this manual Check the unit for shipping damage and material short age file a freight claim and notify Trane office Verify that the installation location of the unit will provide the required clearance for proper operation Assemble and install the roof curb Refer to the current edition of SAHF IN 5 for 20 through 75 Ton units or SXHG IN 2 for 90 through 130 Ton units Fabricate and install ductwork secure ductwork to curb Install pitch pocket for power supply through building roof If applicable Rigging the unit Set the unit onto the curb check for levelness Ensure unit to curb seal is tight and without buckles or cracks 1 Install and connect condensate drain lines to each evaporator drain connection Remove the shipping hardware from each compressor assembly Remove the shipping hold down bolts and shipping chan nels from the supply and exhaust fans ordered with rub ber or spring isolators Check all optional supply and exhaust fan spring isola tors for proper adjustment Verify that all plastic coverings are removed from the compressors Verify all discharge and liquid line service valves one per circuit are back seated Main Electrical Power Requirements Verify that the power supply complies with the unit name plate specifications
130. alled Control Wiring Controls using 24 Controls using DC Analog Input Outputs Constant Volume System Controls Variable Air Volume System Controls Constant Volume or Variable Air Volume System Table of Contents Section Four Unit Start p 55 Cooling Sequence of Operation 55 Gas Heating Sequence of Operation 56 Fenwal Ignition System esee 56 Honeywell Ignition System 56 Modulating Gas Sequence of Operation 57 Flame Failure iiio eer 57 Electric Heat Sequence of Operation 58 Wet Heat Sequence of Operation 58 Electrical Phasing u u 59 Voltage Supply and Voltage Imbalance 60 Service Test Guide for Component 61 Verifying Proper Fan Rotation 63 If all of the fans are rotating backwards 63 System Airflow Measurements 63 Constant Volume 63 Variable Air Volume Systems 6
131. ase rail illustrated in Figure 3 7B Tiedown Bolt detail 2 Remove the bolt in each rubber isolator and the slotted shipping spacer located between the compressor rails and the unit base rail illustrated in Figure 3 7B Isolator Bolt detail Reinstall the bolts at the same location by screwing them into the base rail two to three turns only 3 Ensure that the compressor rail assembly is free to move on the rubber isolators Removing Compressor Assembly Shipping Hardware 115 and 130 Ton Each manifolded compressor assembly is rigidly bolted to a mounting rail assembly The rail assembly sets on eight 8 rubber isolators The assembly is held in place by six 6 Tiedown Bolts To remove the shipping hardware follow the procedure below 1 At each Tiedown location 6 remove and discard the tiedown bolt and the slotted shipping spacer located be tween the compressor rails and the unit base rail illus trated in Figure 3 7C Tiedown Bolt detail 2 Remove the bolt in each rubber isolator and the slotted shipping spacer located between the compressor rails and the unit base rail illustrated in Figure 3 7C Isolator Bolt detail Reinstall the bolts at the same location by screwing them into the base rail two to three turns only 3 Ensure that the compressor rail assembly is free to move on the rubber isolators 27 Figure 3 7 Removing Scroll Shipping Hardware 20 through 60
132. atic pressure control General Information Continued and the unit will return to discharge air control If the occ zone heating setpoint is less than the DWU terminate setpoint the heat will turn off when the occ zone heat setpoint is reached but it will stay in DWU mode and cycle the heat to maintain setpoint Unoccupied Heating Zone Temperature When a VAV unit is equipped with gas electric or hydronic heat and is in the unoccupied mode the zone temperature will be controlled to within the customers specified setpoint deadband During an unoccupied mode for a VAV unit the VAV box unocc relay will be in the unoccupied position and the VFD IGV output will be at 10096 This means that if there is a call for heat or cool and the supply fan comes on it will be at full airflow and the VAV boxes in the space will need to be 100 open as signaled by the box unocc relay Supply Air Tempering On VAV units equipped with Modulating Heat if the sup ply air temperature falls 10 F below the supply air tempera ture setpoint the hydronic heat valve will modulate to maintain the supply air temperature to within the low end of the setpoint deadband Supply Duct Static Pressure Control Occupied The RTM relies on input from the duct pressure transducer when a unit is equipped with Inlet Guide Vanes or a Vari able Frequency Drive to position the Inlet Guide Vanes or set the supply fan speed to maintain the supply duct static pres
133. ation DUCT amp SPACE STATIC PRESSURE CONTROL COMPONENT LAYOUT Space Static Supply Air Transducer Duct Static 3U62 Transducer 3060 Static Reference O Tubing Connects X Discharge Duct Static Tubing Connects Here Space Pressure Sensing Tube Connects Here Calibration Solenoid 3L21 31 Gas Heat Units SFH_ All internal gas piping is factory installed and pressure leak tested before shipment Once the unit is set into place the gas supply line must be field connected to the elbow lo cated inside the gas heat control compartments AN waRNING Hazardous Gases and Flammable Vapors Exposure to hazardous gases from fuel substances have been shown to cause cancer birth defects or other reproductive harm Improper installation adjust alteration service or use of this product could cause flammable mixtures To avoid hazardous gases and flammable vapors follow proper installation and set up of this product and all warnings as provided in this manual Failure to follow all instructions could result in death or serious injury When using dry nitrogen cylinders for pressurizing units for leak testing always provide a pressure regula tor on the cylinder to prevent excessively high unit pressures Never pressurize unit above the maximum recommended unit
134. ator temperature sensor 14 amp 15 mounted on the suction line of each circuit to protect the evaporator from freezing If the evapo rator temperature approaches the specified setpoint adjust able between 25 F and 35 F the compressor s will be off The compressors will not be allowed to restart until the evaporator temperature has risen 10 F above the specified cutout temperature and the compressor s have been off for a minimum of three minutes 55 Lead Lag Operation When Lead Lag is enabled each time the system cycles af ter having stages 1 and 2 On Stage 2 K11 on SCM or K3 on MCM and the corresponding condenser fan output 2A will start first The compressor module cycles the compressors On and Off to keep the zone temperature within the cooling setpoint deadband The condenser fans are cycled On and Off to maintain the saturated refriger ant temperature within the specified controlband Units equipped with 100 modulating exhaust The exhaust dampers are controlled through an Exhaust Comparative Enthalpy Module ECEM The ECE module receives input form a space transducer and modulates the exhaust dampers to maintain the space pressure to within the specified setpoint controlband Gas Heating Sequence of Operation Standard Two Stage Gas Furnace The control system for the rooftop units are wired to ensure that the heating and cooling do not occur simultaneously Refer to the wiring d
135. before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvert ently energized Failure to disconnect power before ser vicing could result in death or serious injury HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK 1TB1 OR UNIT DISCONNECT SWITCH 1514 3 To modify parameters Press the Extended Menu button Press the Left or Right Arrow button to scroll through menus Press the up or down arrow to scroll through parameter settings within a specified menu Press the Change Data button to allow a parameter value to be changed Press the Up or Down arrow button to change the parameter f Press OK button when desired change has been made 4 Repeat step 3 for each menu selection setting in Table 5 To reset all programming parameters back to the factory defaults Press the Extended Menu button Press the Left or Right Arrow button to scroll to the KEYB amp DISPLAY menu i Press the Down Arrow button to scroll to the Active Setup menu j Press the Change Data button Press the Up Arrow button to scroll to the Factory Default setting Press the OK button Press the Up Arrow button to scroll to the Setup Copy menu Press the Change Data button Press the Up Arrow button to scroll to the Copy to Setup 1 setting Press the OK button q Press the button to scroll to the Active Setup menu r Press the Change Data button s Press the Up Arrow button
136. black and contains metal flakes a mechanical failure has occurred This symptom is often accompanied by a high compressor amperage draw If a motor burnout is suspected use an acid test kit to check the condition of the oil Test results will indicate an acid level exceeding 0 05 mg KOH g if a burnout oc curred The scroll compressor uses Trane OIL 42 without substi tution The appropriate oil charge for a 9 and 10 Ton scroll compressor is 8 5 pints For a 14 and 15 Ton scroll compressor use 13 8 pints Compressor Crankcase Heaters 9 and 10 ton scroll compressors have a 100 watt heater in stalled 14 and 15 ton scroll compressors have two 80 watt heaters installed per compressor Compressor Operational Sounds Because of the scroll compressor design it emits a higher frequency tone sound than a reciprocating compressor It is designed to accommodate liquids both oil and refriger ant without causing compressor damage The following dis cussion describes some of the operational sounds that dif ferentiate it from those typically associated with a recipro cating compressor These sounds do not affect the opera tion or reliability of the compressor At Shutdown When a Scroll compressor shuts down the gas within the scroll expands and causes momentary reverse rotation until the discharge check valve closes This results in a flutter type sound At Low Ambient Start Up When the compressor starts up under low ambient co
137. board 4U18 the se quencing time delay relay 4016 and the 2nd stage sole noid on the gas valve 4L15 Once power is removed from the ignition control board it will reset automatically If a call for heat still exists after approximately 60 seconds the contacts for the sequencing time delay relay 4DL6 will close powering the pre purge time delay circuit while tim ing open to the combustion blower relay 4K33 and the 2nd stage solenoid on the gas valve 4L15 The pre purge time delay relay 4DL5 will initiate another ignition se quence The combustion blower motor will continue to op erate as long as a heating requirement exists and the ser vice switch 4524 is On Once the heating demand has been satisfied the combus tion blower motor and the ignition control board is de ener gized Propane Gas Units that operate on propane gas have one additional con trol that affects the combustion blower motor operation when a heating demand has been initiated or satisfied The post purge time delay relay 4014 is installed which delays the starting of the combustion blower by approxi mately 60 seconds Once it has timed out the combustion blower motor will start closing the combustion air flow switch 4525 The ignition sequence will follow the same sequence from the combustion airflow switch 4525 to the subsequent controls as a natural gas system Once the heating demand has been satisfied the Fenwal ignition control
138. box unocc relay will switch to the occupied mode and the VFD IGV output will be controlled by the duct static pressure During Full Capacity MWU the economizer damper is held closed for as long as it takes to reach setpoint During Cycling Capacity MWU the economizer damper is allowed to go to minimum position after one hour of operation if setpoint has not been reached Compressor Motor Winding Thermostats 28751 2B17S2 2B27S5 2B8S3 2B18S4 amp 2B28S6 A thermostat is embedded in the motor windings of each Scroll compressor Each thermostat is designed to open if the motor windings exceeds approximately 221 F The ther mostat will reset automatically when the winding tempera ture 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 SCM detects a problem outside of it s normal parameters it turns any operating 10 General Information Continued compressor s on that circuit Off locks out all compressor operation for that circuit and initiates a manual reset diag nostic Supply Air Temperature Low Limit Uses the supply air temperature sensor input to modulate the economizer damper to minimum position in the event the supply air temperature falls below the occupied heating setpoint temperature Freezestat 4S12 Is a binary input device u
139. c Heat Control Panel Gas Heat Control Panel Steam or Hot Water Control Panel CUSTOMER CONNECTION WIRE RANGE UNITS WITH MAIN POWER NOTES TERMINAL BLOCK ALL VOLTAGES A BLOCK SIZE DISCONNECT SIZE ARE CALCULATED BY SELECTING THE SIZE BLOCK SIZE QTY CONNECTOR WIRE RANGE GREATER THAN DR EQUAL TO Lis X SUM UNIT LOADS SEE UNIT So R 19 5330 MEM LITERATURE FOR UNIT LDAD VALUES 760 c DUO MEM UNITS WITH MAIN POWER DISCONNECT SWITCH KALL gt DISCONNECT SIZE WIRE QTY CONNECTOR WIRE RANGE 100 AMP SP 14 1 0 250 gt 4 350 kcnil 400 D 1 600 kcmil e 1 250 kcnil 600 AMP e 250 500 1000 3 3 0 500 kcmil NOTES ALL WIRING AND COMPONENTS SHOWN DASHED SUPPLIED AND INSTALLED BY THE CUSTOMER IN ACCORDANCE WITH LOCAL ELECTRICAL CODES CUSTOMER CONNECTIONS MAIN UNIT CONTROL CIRCUIT 81 ARE LOCATED IN THE CONDENSER SECTION FOR 20 THRU 75 TON UNITS CUSTOMER CONNECTIONS FOR 90 THRU 130 TON UNITS ARE LOCATED IN THE HEATING SECTION SEE CUSTOMER CONNECTION WIRE RANGE TABLE FOR ACCEPTABLE WIRE SIZES FOR CONNECTION MAIN UNIT TERMINAL BLOCK 1TB1 4TB OR DISCONNECT SWITCH 181474815 WIRES TO THE OPTIONAL STEAM AND OR HOT WATER HEAT VALVE ARE SUPPLIED WITH THE UNIT WIRE CONNECTIONS TO THE VALVE BE MADE BY THE CUSTOMER 40 CO
140. ck the disconnect switch in the open position while working at the unit c Interchange any two of the fan motor leads at the contactor for each fan that is rotating backwards System Airflow Measurements Constant Volume Systems 1 Ensure that the System selection switch at the remote panel is in the Off position and the Fan selection switch for constant volume units is in the Auto position VAV units do not utilize a Fan selection input 2 Close the disconnect switch or circuit protector switch that provides the supply power to the unit s terminal block 1TB1 or the unit mounted disconnect switch 1514 Z warnine Hazardous Voltage Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvert ently energized Failure to disconnect power before ser vicing could result in death or serious injury HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK 1TB1 OR UNIT DISCONNECT SWITCH 1514 3 Turn the 115 volt control circuit switch 151 and the 24 volt control circuit switch 1S70 to the On position 4 Open the Human Interface access door located in the unit control panel and press the SERVICE MODE key to display the first service screen Refer to the latest edition of the appropriate SAHF PTG manual for CV or VAV ap plications for the SERVICE TEST screens and program ming instructions 63 Figure 4 1
141. control Supply Inlet Vanes VFD if equipped Controlled by S A Pressure Control with supply air pressure high limit disabled Exhaust fan ON Exhaust dampers Open O A dampers Open Heat All stages OFF Modulating Heat output at 0 vdc Occupied Unoccupied output Energized Unoccupied VO Relay Energized Pre heater State Off if equipped OFF will appear in the Ventilation Override screen after all VOM binary inputs have been reset opened Due to codes in some areas the definitions for some or all of the VOM modes may have to be locked into the program by the user Once the definitions are locked the Ventilation Override Module must be replaced in order to reprogram that sequence Refer to Figure 3 16 amp 3 17 for the proper connection termi nals in the unit control panel for each of the VOM initiating device s and the appropriate Programming Troubleshooting Guide PTG Latest Edition for programming instructions Emergency Override Definitions with LCI I module installed When module is installed the user can initiate one of five 5 Emergency Override sqeuences that have the fol lowing predefined unit operation PRESSURIZE Supply Fan On Inlet Vanes Open if equipped Exhaust Fan Off if equipped Exhaust Dampers Closed if equipped OA Dampers Open Heat All heat stages Off staged gas and elec Hydronic heat amp Mod Gas Heat outp
142. cted MOP is less than the MCA then select the lowest standard maximum fuse size which is equal to or larger than the MCA provided the selected fuse size does not exceed 800 amps RDE 1 5 x LOAD1 LOAD2 LOAD4 Select a fuse rating equal to the RDE value If the RDE value does not equal a standard fuse size as listed in NEC 240 6 select the next higher standard fuse rating Note If the selected RDE is greater than the selected MOP value then select the RDE value to equal the MOP value Calculation 2 Rooftop units with Electric Heat SEH_ 20 130 Tons A Single Source Power 380V 415V 460V and 575V To arrive at the correct MCA MOP and RDE values for these units you must perform two sets of calculations First calculate the MCA MOP and RDE values as if the unit was operating in the cooling mode use the equations given in Calculation 1 above Then calculate the MCA MOP and RDE values as if the unit was operating in the heating mode as follows Keep in mind when determining LOADS that the compressors do not operate while the unit is in the heating mode For units using heaters less than 50 kw MCA 1 25 x LOAD 1 LOAD 2 LOAD 4 1 25 x LOAD 3 For units using heaters equal to or greater than 50 kw MCA 1 25 x LOAD 1 LOAD 2 LOAD 4 LOAD 3 The nameplate MCA value will be the larger of the cooling mode MCA value or the heating mode MCA value calculated above MOP 2 25 x LOAD 1 LOAD 2 LOAD 3 LOAD 4
143. d for proper rotation The direction of rotation is indicated by an arrow on the fan housings Check the condenser fans for clockwise rotation when viewed from the top If all of the fans are rotating backwards a Press the STOP key at the Human Interface Module in the unit control panel to stop the fan operation b Open the field supplied disconnect switch upstream of the rooftop unit Lock the disconnect switch in the open position while working at the unit Unit Start Up Continued Z warnine Hazardous Voltage Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvert ently energized Failure to disconnect power before ser vicing could result in death or serious injury c Interchange any two of the field connected main power wires at the unit terminal block 1TB1 or the factory mounted disconnect switch 1514 Note Interchanging Load side power wires at the fan contactors will only affect the individual fan rotation Ensure that the voltage phase sequence at the main terminal block 1TB1 or the factory mounted disconnect switch 1514 is as outlined in the Electrical Phasing section If some of the fans are rotating backwards a Press the STOP key at the Human Interface Module in the unit control panel to stop the fan operation b Open the field supplied disconnect switch upstream of the rooftop unit Lo
144. d result in death or serious injury Filters 1 Inspect the return air filters Clean or replace them if nec essary Refer to the Table 5 4 for filter information Cooling Season Check the unit s drain pans and condensate piping to ensure that there are no blockages 1 Inspect the evaporator and condenser coils for dirt bent fins etc If the coils appear dirty clean them according to the instructions described in Coil Cleaning later in this section 1 Manually rotate the condenser fans to ensure free move ment and check motor bearings for wear Verify that all of the fan mounting hardware is tight 1 Inspect the F A R A damper hinges and pins to ensure that all moving parts are securely mounted Keep the blades clean as necessary Verify that all damper linkages move freely lubricate with white grease if necessary Check supply fan motor bearings repair or replace the motor as necessary Check the fan shaft bearings for wear Replace the bear ings as necessary Lubricate the supply fan bearings with a lithium based grease Refer to Table 5 6 for recommended greases Note The bearings are manufactured using a special synthetic lithium based grease designed for long life and minimum lube intervals Over lubrication can be just as harmful as not enough Use a hand grease gun to lubricate these bearings add grease until a light bead appears all around the seal Do not over lubricate
145. death or serious injury HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK 1TB1 OR UNIT DISCONNECT SWITCH 1514 Turn the 115 volt control circuit switch 151 Off Turn the 24 volt control circuit switch 1570 to the On position At the Human Interface Module press the SETUP key The LCD screen will display various preset parameters of operation based on the unit type size and the in stalled options Compare the factory preset information to the specified application requirements If adjustments are required follow the step by step instructions pro vided in the appropriate SAHF PTG manual for CV or applications Program the Night Setback NSB panel if applicable for proper unoccupied operation Refer to the programming instructions for the specific panel Verify that the Remote panel System selection switch Fan selection switch and Zone Temperature settings for constant volume systems are correct Verify that the Remote panel System selection switch and the Supply Air Temperature settings for variable air volume systems are correct Inspect the unit for misplaced tools hardware and de bris Turn the 115 volt control circuit switch 151 On Press the AUTO key at the Human Interface Module to begin system operation The system will start automati cally once the dampers modulate and a request for either heating or cooling has been given Verify that all exterior pan
146. dry bulb temperature F operating suction pressure psig onto the chart entering the condenser coil 5 At the point of intersection read to the left for the 3 Measure the discharge and suction pressure psig discharge pressure The measured discharge next to the compressor pressure should be within 7 psig of the graph 86 Table 4 6 Continued 50 Ton Operating Pressure Curve All Compressors and Condenser Fans ckt COOLING CYCLE PRESSURE CURVE Based on Indoor Airflow of 400 CFM Ton FULL LOAD 380 360 30 105 OD Ambient 0 320 t 95 F OD Ambient 300 o Lu 280 85 F OD Ambient E 260 rc lt 75 Ambient 5 240 D 220 65 OD Ambient 200 180 50 55 60 65 70 75 80 85 90 95 100 To Check Operating Pressures 1 Start the unit and allow the pressures to stabilize 2 Measure the outdoor air dry bulb temperature F entering the condenser coil 3 Measure the discharge and suction pressure psig next to the compressor SUCTION PRESSURE PSIG 4 Plot the outdoor dry bulb temperature and the operating suction pressure psig onto the chart 5 At the point of intersection read to the left for the discharge pressure The measured discharge pressure should be within 7 psig of the graph 55 Ton Operating Pressure Curve All Compr
147. dule Locations for S HF 20 amp 25 Ton Units NOTES C1 00 NOT PLACE A SCREW IN THE CENTER MOUNTING HOLE S OF ANY UCM BOARD TO ALLOW FOR EASIER BOARD REMOVAL IN THE FIELD Bracket 7 gt 5 A lt y 3141 3 Bracket D Bracket Heat MOD 1050 1054 Mounting VOM SA h Mounting dd Plate 12 General Information Continued Space Temperature Averaging with Multiple Sensors Single Zone Averaging Circuit Remote Sensor 1 Four Zone Averaging Circuit Remote Sensor 1 1 Terminals on the Zone Sensor 1 4 Remote Sensor 2 Remote Sensor 43 IV VVV 3j Remote Sensor 4 IV VV VP VVVV 3 Nine Zone Averaging Circuit Remote Sensor 1 Remote Sensor 4 Remote Sensor 7 Remote Sensor 2 9 V V VV Y 9 VV VV v 3 VVVVv 3 Remote Sensor 5 E 9 V V VV Y 9 VV VV v VVV V e e Remote Sensor 8 L 9VVVVt 3VVVVv 3VVVVY i To Terminals on the Zone Sensor Module or to 1TB4 Remote Sensor 3 Remote Sensor 6 Remote Sensor 9 1 To Terminals on the Zone Sensor Module or to 1 4 Control Module Locations for S HF 30 Ton Units NOTES C1 DO NOT PLACE A SCREW IN THE CENTER MOUNT NG HOLE S OF ANY UCM BOARD TO ALLOW FOR EASIER BOARD REMOVAL IN
148. e and Cartridge box type filters Table 5 5 Wet Heat Coil Fin Data Total Coil Fins Fins Coil Coil Face Area per per Model Type Rows sq ft Foot Foot SLHF C20 WC C25 amp C30 Prima Flo 2 13 75 80 110 hot water SLHF C40 WC C50 amp C55 Prima Flo 2 19 25 80 110 hot water SLHF C60 WC C70 amp C75 Prima Flo 2 26 25 80 110 hot water SLHG C90 WC D11 D12 Prima Flo 2 17 5 2 80 110 amp D13 hot water SSHF C20 NS 1 13 75 42 96 C25 amp C30 steam SSHF C40 NS 1 13 75 1 42 96 C50 amp C55 steam 5 5 1 SSHF C60 NS 1 18 75 1 42 72 C70 amp C75 steam 7 5 1 SLHG C90 NS 1 17 5 2 52 96 011 012 steam amp 013 Note To determine unit heating capacity low heat or high heat see Digit 9 of the model number stamped on the unit nameplate 102 Service 8 Maintenance Continued Table 5 6 Grease Recommendations Recommended Recommended Grease Operating Range Exxon Unirex 2 Mobil 532 20 F to 250 F Mobil SHC 220 Texaco Premium RB Table 5 7 Refrigerant Coil Fin Data oil ns il Face Coil Fin Tube Coil per Area Tube Model Type Config Dia Rows Foot sq ft Type S HF C20 Evaporator waw 3B 0 5 2 148 20 30 FF Hi Cap Evaporator wavy 3B 0 5 4 148 20 30 FF Condenser waw 3B 0 375 3 156 35 00 smooth S HF C25 waw 3B 0 5 2 148 20 30 FF Hi Cap Evaporator wavy 3B 0 5 4 148 20 30 FF Condenser 38 0 375 3 156 35 00 smo
149. e appropriate the fresh air damper pressure drop against the return static hole s The length of the drive rod may need to be pressure use the following steps If no adjustment is neces adjusted to align with the new hole s location If so sary proceed to step 17 loosen the lock nut on the drive rod against the swivel Turn the swivel in out to shorten lengthen the 12 Remove the drive rod and swivel from the crank arm s as necessary For some holes both ends of the rod may If only one hole requires changing loosen only that end need to be adjusted 13 Manually open the return air dampers to the full open 16 Tighten the lock nut against the swivel s position 17 Plug the holes after the proper CFM has been 14 Manually close the fresh air dampers established Table 4 5 F A Damper Travel Adjustment Position of Damper Connecting Arm Hole See Figure 4 5 Configuration Position 1 2 3 Use the tables below to select the appropriate Position 2 2 4 crank arm hole configuration based on the Position 3 2 5 a specific unit Position 4 2 6 b operating CFM Position 5 1 8 c and return static pressure Position 6 1 7 Note As shipped from the factory the connect rod is installed in Position 1 Fresh Air Damper Pressure Drop inches w c 20 and 25 Ton Units 50 55 Ton Units 1 2 3 4 5 6 1 2 3 4 5 6 1
150. e e ten edes 111 ON isn Ain cds ee ead n 114 Warranty Sant ates Aves 114 Cooling Sequence of Operation Time delays are built into the controls to increase reliability and performance by protecting the compressors and maxi mizing unit efficiency Sequence of Operation Compressor Crankcase Heaters Each compressor is equipped with a crankcase heater and is controlled by a 600 volt auxiliary switch on the compres sor contactor The proper operation of the crankcase heater is important to maintain an elevated compessor oil tempera ture during the Off cycle to reduce oil foaming during com pressor starts When the compressor starts the sudden reduction in crank case pressure causes the liquid refrigerant to boil rapidly causing the oil to foam This condition could damage com pressor bearings due to reduced lubrication and could cause compressor mechanical failures When power has been Off for an extended period allow the crankcase heater to operate a minimum of 8 hours be fore starting the unit Units without an Economizer Upon entering an occupied mode of operation the RTM receives input from the remote panel to start the supply fan For constant volume applications the RTM supply fan con tacts K2 close which energizes the supply fan contactor 1K16 Units equipped with Inlet Guide Vanes IGV the fan is delayed until the inlet guide vanes are driven to the full closed position When the s
151. ections as well as damaged wire insulation Make any necessary repairs Gas Heat Units only Check the heat exchanger for any corrosion cracks or holes Check the combustion air blower for dirt Clean as neces sary Note Typically it is not necessary to clean the gas furnace However if cleaning does become necessary remove the burner inspection plate from the rear of the heat exchanger to access the drum Be sure to replace the existing gaskets with new ones before reinstalling the inspection plate Open the main gas valve and apply power to the unit heating section then initiate a Heat test using the start up procedure described in Gas Furnace Start Up A warnine Hazardous Gases and Flammable Vapors Exposure to hazardous gases from fuel substances have been shown to cause cancer birth defects or other reproductive harm Improper installation adjust ment alteration service or use of this product could cause flammable mixtures To avoid hazardous gases and flammable vapors follow proper installation and set up of this product and all warnings as provided in this manual Failure to follow all instructions could result in death or serious injury When using dry nitrogen cylinders for pressurizing units for leak testing always provide a pressure regula tor on the cylinder to prevent excessively high unit pressures Never pressurize unit above the maximum recommended unit test pressure as specified in a
152. ed Modulating High Heat G Limited Modulating Low Heat P Full Modulating High Heat M Full Modulating Low Heat Note When the second digit calls for E electric heat the following values apply D 30 KW R 130 KW H 50 KW U 150 KW L 70 KW V 170 KW N 90 KW W 190 KW Q 110 KW Note When the second digit calls L Hot Water or S Steam Heat one of the following valve size values must be in Digit 9 High Heat Coil 1 50 2 75 3 1 4 1 25 5 1 5 6 2 Low Heat Coil 50 75 1 D 1 25 1 5 2 Digit 10 Design Sequence 3 Disconnect Redesign Note Sequence may be any letter A thru 2 or any digit 1 thru 9 Digit 11 Exhaust Option 0 1 Barometric 2 100 1 5 3 100 3 4 100 5 5 100 7 5 6 100 10 7 100 15 8 100 20 50 1 5 50 3 50 5 D 50 7 5 E 100 1 5 HP F 100 3 HP G 100 5 HP H 100 7 5 HP J 100 10 HP K 100 15 HP L 100 20 50 w Statitrac w Statitrac w o Statitrac CV only Digit 12 Exhaust Fan Drive 0 None 8 800 4 400 RPM 9 900 RPM 5 500 1000 6 600 1100 7 700 RPM Digit 13 Filter Throwaway Cleanable Wire High Efficiency
153. ed and connected to the unit gas train All gas piping joints properly sealed 1 Drip leg Installed in the gas piping near the unit Gas piping leak checked with a soap solution If piping connections to the unit are complete do not pressurize piping in excess of 0 50 psig or 14 inches w c to prevent component failure Main supply gas pressure adequate Flue Tubes clear of any obstructions Factory supplied flue assembly installed on the unit Connect the 3 4 CPVC furnace drain stubout to a proper condensate drain Requirements for Hot Water Heat SLH Route properly sized water piping through the base of the unit into the heating section 1 Install the factory supplied 3 way modulating valve Complete the valve actuator wiring 25 Requirements for Steam SSH_ Install automatic air vent at the top of the return water coil header Route properly sized steam piping through the base of the unit into the heating section Install the factory supplied 2 way modulating valve Complete the valve actuator wiring Install 1 2 15 degree swing check vacuum breaker s at the top of each coil section Vent breaker s to theatmo sphere or merge with return main at discharge side of steam trap Position the steam trap discharge at least 12 below the outlet connection on the coil Figure 3 6 Condensate Drain Locations Installation Continued
154. ediately and will 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 be locked out and a manual reset diagnostic is initiated Saturated Condenser Temperature Sensors 2RT1 and 2RT2 Are analog input devices used on CV amp VAV applications mounted inside a temperature well located on a condenser tube bend They monitor the saturated refrigerant tempera ture inside the condenser coil and are connected to the SCM MCM 1U49 As the saturated refrigerant temperature varies due to operating conditions the condenser fans are cycled On or Off as required to maintain acceptable op erating pressures Head Pressure Control is accomplished using two saturated refrigerant tempera ture sensors on CV amp VAV applications During a request for compressor operation when the condensing tempera ture rises above the lower limit of the controlband the Compressor Module SCM MCM starts sequencing con General Information Continued denser fans On If the operating fans can not bring the condensing temperature to within the controlband more fans are turned on As the saturated condensing tempera ture approaches the lower limit of the controlband fans sequenced Off The minimum On Off time for condenser fan staging is 5 2 seconds If the system is operating ata given fan stage below 100 for 30 minutes and
155. el to establish which conditions are best suited to main tain the cooling requirements It is mounted in the return air section and is connected to the ECEM 1U52 Low Ambient Control The low ambient modulating output on the compressor module is functional on all units with or without the low am bient option When the compressor module has staged up to it s highest stage stage 2 or 3 depending on unit size the modulating output will be at 100 10 VDC When the control is at stage 1 the modulating output 0 to 10 VDC will control the saturated condensing temperature to within the programmable condensing temperature low ambient control point Status Annunciator Output Is an internal function within the RTM 1U48 module on CV amp VAV applications that provides a diagnostic and mode status signals to the remote panel LEDs and to the Human Interface 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 Low Ambient Compressor Lockout Utilizes an analog input device for CV amp VAV applications When the system is configured for low ambient compressor lockout the compressors are not allowed to operate if the temperature of the outside air falls below the lockout set point When the temperature rises 5 F above the lockout setpoint the compressors are allowed to operate The set point for unit
156. electrical service entrance is illustrated in stalled non fused disconnect switch a field supplied dis Figure 3 2 Complete the unit s power wiring connections connect switch must be installed at or near the unit in ac onto either the main terminal block 1TB1 or the factory cordance with the National Electrical Code NEC latest mounted non fused disconnect switch 1514 inside the edition Refer to the Power Wire Sizing amp Protection De unit control panel Refer to the customer connection dia vice Equations DSS calculation for determining the gram that shipped with the unit for specific termination correct size points 4 Provide proper grounding for the unit in accordance with local and national codes Figure 3 14 Typical Field Power Wiring 20 thru 75 Ton SEHF 200 230 ONLY Field Supplied Additional field supplied SL SS HF Units Only Disconnect Switch Disconnect Switch 4 Field Electrical Req d unless factory mounted Req d unless factory mounted Connection at valve disconnect switch is ordered disconnect switch is ordered Actuator 4U15 Wiring is factory supplied E Ns BBBB 1514 4515 4511 67 1 4U15 Pitch Pocket Pitch Pocket Pitch Z Pocket
157. els including the control panel doors and condenser grilles are secured in place 99 Table 5 1 Control Settings Time Delays Service amp Maintenance Control Description Elec Designation Contacts Open Contacts Closed Compressor Circuit Breakers S HF 20 60 1CB8 thru 1CB11 See Table 5 2 See Table 5 2 S HG 90 130 1CB14 thru 1CB17 See Table 5 2 See Table 5 2 Combustion Airflow Switch Gas Heat Only 4S25 see note 1 0 1 0 25 wc rise in press diff High Limit Cutout Gas Heat Only 4S26 250 15 210 Supply Airflow Switch Gas Heat Only 4538 0 03 0 12 wc 0 15 0 05 wc rise press diff Disch High Limit Electric Heat Only 4S27 133 5F 110 5 Linear High Limit Electric Heat Only 4533 185 10 F std UL 145 F std UL 165 F 10 F CSA 125 F CSA Freezestat Hydronic Heat Only 4S12 N O Auto Reset 40 F Gas Heat Units Prepurge Timer Fenwall 4DL5 N C timed to close 60 seconds Honeywell 4U18 internal timing function 60 seconds Sequencing Time Delay Relay 4DL6 N C timed to close 60 seconds 20 Notes 1 The combustion airflow switch 4S25 differential is 0 02 0 08 we Compressor Circuit Breakers 1CB8 1CB11 amp 1CB14 1CB17 Electrical Characteristics Table 5 2 Unit Compr Compr Size Desig Size 20 A amp B 9 ton 25 B 14 ton A 9 ton 30 A amp B 14 ton 40 1 2 1 28 9 ton 50 1B 2B 14 ton 1 2 9 ton 55 1 2 4 1 28 14ton 60
158. ely 221 F 10 N Nameplate location 2 6 Natural Gas Combustion Curve 96 See Table 4 8 Occupied 11 Occupied Heating esent 11 Occupied Unoccupied Contacts 47 Operating Pressure Curve 85 92 See Table 4 6 Standard amp Hi Cap Operation and Service Clearances 15 Operator s Maintenance Log 110 See Table 5 8 ordering replacement parts 4 Outdoor Air Humidity Sensor a 9 Outside Air Pressure Sensor 31 Outside Air adeb mites 31 See Figure 3 9 P PzTraps at the Unit ihe nte tees 27 See Figure 3 6 Power Wire Sizing and Protection Device Equations 43 See Figure 3 15 eel e Ce DARE 56 R Refrigerant Charging 83 Refrigerant Coil Fin 103 See Table 5 7 Refrigerant Coils cedere 109 See Coil Cleaning Remote Human Interface Module 46 Remote Panel w 45 See BAYSENS019 BAYSENSO20 Remote Panel w o NSB 45 46 See BAYSENSO10B BAYSENS021A Re
159. ength when determining the appropriate gas pipe size 2 Obtain the Specific Gravity and BTU Cu Ft from the gas company 3 The following example demonstrates the considerations necessary when determining the actual pipe size Example A 40 pipe run is needed to connect a unit with a 500 MBH furnace to a natural gas supply having a rating of 1 000 BTU Cu Ft and a specific gravity of 0 60 Cu Ft Hour Furnace MBH Input Gas BTU Cu Ft X Multiplier Table 3 1 Cu Ft Hour 500 Table 3 indicates thata 1 1 4 pipe is required Specific Gas Heating Capacity Altitude Correction Factors Gravity Multiplier Altitude Ft 0 50 1 10 Sea Level 2001 2501 3501 4501 5501 6501 0 55 1 04 2000 102500 3500 To4500 To5500 To6500 7500 0 60 1 00 Capacity 0 65 0 96 Multiplier 1 00 92 88 84 80 76 72 Note Correction factors AGA Sid 221 30 1964 Part 6 12 Local codes may supersede Figure 3 10 Unit Gas Trains Natural Gas 235 and 350 MBH Pa Gas Valve Orifice Assembly XL Manual Shutoff Valve 1 1 4 Field Connection Elbow 500 and 850 MBH Manual Orifi Manual n Shutoff er ST d alve
160. entification code is provided below Its use can define the unit s specific components type of applica tion i e CV or for a particular unit SXHF C2040A 1 0 A 15 D 01 A R L etc 1234 5 6 7 8 910 11 12 13 14 15 16 17 18 19 20 21 When ordering replacement parts or requesting service be sure to refer to the specific model number serial number and DL number if applicable stamped on the unit name plate Sample Model No Digit Digit 1 Unit Type S Self Contained Digit 2 Unit Function A DX Cooling No Heat E DX Cooling Electric Heat F DX Cooling Natural Gas Heat L DX Cooling Hot Water Heat S DX Cooling Steam Heat X DX Cooling Extended Casings DX Cooling Propane Gas Heat Digit 3 Unit Airflow H Single Zone Digit 4 Development Sequence Sixth Digits 5 6 7 Nominal Capacity C20 20 Tons 55 55 Tons C25 25 Tons C60 60 Tons 30 Tons 70 70 Tons C40 40 Tons 75 75 Tons C50 50 Tons Digit 8 Power Supply 4 460 60 3 XL 5 575 60 3 XL E 200 60 3 XL F 230 60 3 XL Note SEHF units unit with electric heat utilizing 208V or 230V require dual power source Digit 9 Heating Capacity Note When the second digit calls for F Gas Heat the following values apply Additionally please note G and M available ONLY on 50 Ton models and above H High Heat 2 Stage L Low Heat 2 Stage 0 Heat J Limit
161. equal to the MOP value obtained in the equation above If the MOP value does not equal a standard fuse size as listed in NEC 240 6 select the next lower standard fuse rating see note be low for exception Note If selected MOP is less than the MCA obtained in the equation above then select the lowest standard maximum fuse size which is equal to or larger than the MCA provided the selected fuse size does not exceed 800 amps RDE LOAD 3 Select a fuse rating for the electric heating circuit that s equal to the RDE value If the RDE value does not equal a standard fuse size as listed in NEC 240 6 select the next higher standard fuse rating Note If the selected RDE is greater than the selected MOP value then select the RDE value to equal the MOP value Disconnect Switch Sizing DSS Calculation 1 SX SF SA SL or SS Single Power Source Units DSS 1 15 X LOAD 1 LOAD 2 LOAD 4 Calculation 2 All SEH_ Single Power Source Units DSS 1 15 X LOAD 3 Supply Fan FLA Exhaust Fan FLA PLUS DSS 1 15 X LOAD 1 LOAD 2 LOAD 4 Use the larger value of the two calculations to size the electrical service Calculation 3 SEHF 200 230 Volt 20 75 Ton Dual Power Source Units DSS 1 15 X LOADS for the Electric heater AND Calculation 1 for the Refrigeration Components 44 Field Installed Control Wiring The Rooftop Module RTM must have a mode input in or der to operate the rooftop unit The flexibility of ha
162. eration and monitor unit operating status from a remote location Use the installation instructions that shipped with the panel to install it and the unit s field wiring diagram to connect it to the unit VAV Changeover Contacts 5K87 These contacts are connected to the RTM when daytime heating on VAV units with internal or external hydronic heat is required Daytime occupied heating switches the system to a CV type mode of operation Refer to the unit wiring dia gram for the field connection terminals in the unit control panel The switch must be rated at 12 ma 24 VDC mini mum Constant Volume or Variable Air Volume System Controls Remote Human Interface Module 5U66 The remote Human Interface module enables the operator to set of modify the operating parameters of the unit using it s 16 key keypad and view the operating status of the unit on the 2 line 40 character LCD screen without leaving the building However the Remote Human Interface module can not be used to perform any service functions One remote panel is designed to monitor and control up to four units providing each of the units are equipped with an IPCB module Use the installation instructions that shipped with the module to install it and the appropriate illustrations in Figure 3 16 or 3 17 to connect it to the unit Remote Zone Sensor BAYSENS013C This electronic analog sensor features remote zone sensing and timed override with override cancellation It
163. erator to set or modify the operating parameters Heat Module 1U50 used on heating units The Heat module upon receiving a request for Heating en ergizes the appropriate heating stages or strokes the Modu lating Heating valve as required General Information Continued Ventilation Override Module VOM Optional 1U51 The Ventilation Override module initiates specified func tions such as space pressurization exhaust purge purge with duct pressure control and unit off when any one of the five 5 binary inputs to the module are activated The com pressors and condenser fans are disabled during the ven tilation operation If more than one ventilation sequence is activated the one with the highest priority is initiated Interprocessor Communications Board IPCB Optional 1U55 used with the Optional Remote Human Interface The Interprocessor Communication Board expands commu nications from the rooftop unit UCM network to a Remote Human Interface Panel DIP switch settings on the IPCB module for this application should be Switches 1 and 2 Switch 3 Trane Communications Interface Module TCI Optional 1U54 used on units with Trane ICS The Trane Communication Interface module expands com munications from the unit UCM network to a Trane Tracer 100 or a Tracer Summit system and allows external setpoint adjustment and monitoring of status and diagnos tics DIP Switch settings on the TCI module for t
164. essors and Condenser Fans per ckt 55 Ton Operating Pressure Curve All Compressors and Condenser Fans per ckt Cooling Cycle Pressure Curve 360 340 320 300 240 Discharge Pressure PSIG 220 200 Based Indoor Airfow of 400 Full Load 105 F OD Ambient 95 F OD Ambient 85 F OD Ambient 75 F OD Ambient lier 65 F OD Ambient L 1 50 55 60 65 70 75 80 Suction Pressure PSIG 87 85 90 95 100 Table 4 6 Continued 55 Hi Operating Pressure Curve Compressors Condenser Fans ckt 55 Ton Hi Operating Pressure Curve Compressors and Condenser Fans ckt Cooling Cycle Pressure Curve Based on Indoor Airfow of 400 CFM Ton Full Load 360 105 F OD Ambient ien 340 320 A 95 F OD Ambient 300 9 e 2 280 85 F OD Ambient E 9 a 260 2 75 F OD Ambient S 9 240 65 F OD Ambient 220 L 200 50 55 60 65 70 75 80 85 90 95 100 Suction Pressure PSIG 60 Ton Operating Pressure Curve All Compressors and Condenser Fans per ckt On COOLING CYCLE PRESSURE CU
165. g at 1TB4 Lae B 1 1 8 Dia Hole for field installed DC wiring terminating at 1TB15 1 1 8 Dia Hole for installing AC control wiring terminating at 1 16 115 6 D 1 1 8 Dia for installing H1 4 3 4 AC amp DC control wiring terminating at 1TB17 14 0 19 32 3 1 2 Dia Hole for main power wiring 14 2 19 32 _ 12 4 1 8 M 12 11 1 8 e 2 5 91 a ls 5 7 8 21 D C B K 5 Return Air 8 1 2 7 9 32 Opening 2 Main Unit p Control Box 3 9 77 0 Supply Air Opening 97173 or Gas u 21 25 32 ontrol a N 2 4 71 10 0 5 8 WT 11 10 25 32 21 5 3 8 3 1 2 Dia Hole 4 11 16 Dia Hole for Steam for das Piping or Hot Water Piping 20 Figure 3 3 Center of Gravity Data See Note 1 i Condenser Section B Top View Units with 100 Exhaust Fan Unit Dim Dim B SAHF 12 6 12 9 12 5 15 7 16 7 4 8 3 8 3 8 15 7 4 7 4 8 4 8 17 10 18 1 18 5 17 0 17 5 28 3 7 3 8 3 9 3710 3710 46 4 7 18 9 19 1 90 18 11 60 011 193 60 012 192 5710 511 5 10 5 10 D12 19 4 6 0 D13 196 60 Note D13 19 5 13 5 13 7 13 3 16 9 17 9 18 1 371
166. h sides of the unit and the filters A warnine No Step Surface Do not walk on the sheet metal drain pan Walking on the drain pan could cause the supporting metal to collapse Failure of the drain pan could result in death or serious injury Note Bridging between the unit s main supports may consist of multiple 2 by 12 boards or sheet metal grating 2 Straighten any bent coil fins with a fin comb Use the data in Table 5 7 to determine the appropriate fin comb size 3 Mix the detergent with water according to the manufacturer s instructions If desired heat the solution to 150 F maximum to improve its cleansing capability N wanNING Contains Refrigerant System contains oil and refrigerant under high pres sure Recover refrigerant to relieve pressure before opening the system See unit nameplate for refrigerant type Do not use non approved refrigerants refrigerant substitutes or refrigerant additives Failure to follow proper procedures or the use of non ap proved refrigerants refrigerant substitutes or refriger ant additives could result in death or serious injury or equipment damage 6 Rinse both sides of the coil with cool clean water 7 Inspect both sides of the coil if it still appears to be dirty repeat Steps 7 and 8 8 Reinstall all of the components and panels removed in Step 2 then restore power to the unit Service amp Maintenance Continued Note Refrigerant oil is detriment
167. haust Dampers Closed if equipped OA Dampers Closed Heat All heat stages Off staged gas and elec Hydronic heat amp Mod Gas Heat output at 0 Occupied Unoccupied output De energized VO Relay Energized with VOM module installed OA Preheater State Off with VCM module installed Table 3 10 Temperature vs Resistance Coefficient The UCM network relies on various sensors located throughout the system to provide temperature information in the form of an analog input All of the sensors used have the same temperature vs resistance co efficient and are made from Keystone Carbon D97 material with a 1 degree Centigrade tolerance Resistance in 1000 Ohms Resistance Temperature F Temperature F in 1000 Ohms 40 346 1 71 11 6 30 2417 72 11 31 20 170 1 73 11 03 10 121 4 74 10 76 5 103 75 10 5 0 87 56 76 10 25 5 74 65 77 10 10 638 78 9 76 15 54 66 79 9 53 20 46 94 80 9 3 25 40 4 85 8 25 30 34 85 90 7 33 35 30 18 100 5 82 40 26 22 105 5 21 45 22 85 110 4 66 50 19 96 120 3 76 55 17 47 130 3 05 60 15 33 140 25 65 13 49 150 2 05 66 1315 160 1 69 67 12 82 170 14 68 12 5 180 1 17 69 12 19 190 0 985 70 11 89 200 0 83 48 Emergency Stop Switch 5571 A normally closed N C switch 5S71 wired to the RTM may be used during emergency situations to shut down all unit operations When opened an immediate shutdown oc curs An emergency stop diagnostic is entered into the Hu man Interf
168. he least amount of turbulence Several locations may be necessary and average the reading ZA warnine Hazardous Voltage Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvert ently energized Failure to disconnect power before ser vicing could result in death or serious injury HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK 1TB1 OR UNIT DISCONNECT SWITCH 1514 80 Unit Start Up Continued 2 Close the disconnect switch or circuit protector switch that provides the supply power to the unit s terminal block 1TB1 or the unit mounted disconnect switch 1514 Turn the 115 volt control circuit switch 161 and the 24 volt control circuit switch 1570 to the On position Open the Human Interface access door located in the unit control panel and press the SERVICE MODE key to display the first service screen Refer to the latest edition of the applicable SAHF PTG manual for CV or VAV applications for the SERVICE TEST screens and programming instructions Use Table 4 1 to program the following system components for operation by scrolling through the displays Supply Fan On Inlet Guide Vanes 100 Open if applicable Variable Frequency Drive 100 Output if applicable RTM Occ Unocc Output Unoccupied Fresh Air Dampers Closed Once the configuration for the components is complete press the NEXT key until the LC
169. he unit nameplate Figure 3 1 Minimum Operation and Service Clearances for Single amp Multiple Unit Installation NOT TO SCALE Single Unit Installation TEE Legend Series MON opning See Note 4 M Clearance Fres ir Intake 4 Supply Opening v G D Condenser Section i B D Optional 2 10 3 4 Access ES 2 Door 180 swing 58 a 850 Hinged 2 10 3 4 Filter Note 1 SE Access Door 180 swing gt ors Hinged 2710 3 4 Heater TE me Access Door 180 swing x 28 Hinged 2 10 3 4 Supply Fan ou Access Door 180 swing iy N 90 130 SEE 377 J Hinged 2 4 1 2 Control Panel ali 2 Door 180 Swing Note 2 80 Minimum 90 thru 130 Ton Service Airflow K VFD Access Panel Clearance Multiple Unit Installation ae Fresh Air Exhaust Air Intake Exhaust Air Intake L Fresh Air Exhaust Air Intake I Condenser Condenser lt um Section eT Mimi Section Note 1 inimum Note Service Airflow ees N Clearance N 4 Note 3 12 0 Minimum Service Airflow Notes S 1 Provide unrestricted clearance above
170. hese applications should be Tracer 100 Comm3 Switches 1 2 and 3 are Off Tracer Summit Comm4 Switch 1 is On switches 2 and 3 are Off Lontalk Communication Interface Module LCI Optional 1U54 used on units with Trane ICS or 3rd party Build ing AutomationSystems The LonTalk Communication Interface module expands communications from the unit UCM network to a Trane Tracer Summit or a 3rd party building automation system utilizing LonTalk and allows external setpoint and configu ration adjustment and monitoring of status and diagnostics Exhaust Comparative Enthalpy Module ECEM Optional 1U52 used on units with Statitrac and or comparative enthalpy options The Exhaust Comparative Enthalpy module receives infor mation from the return air humidity sensor the outside air humidity sensor and the return air temperature sensor to utilize the lowest possible humidity level when considering economizer operation In addition it receives space pres sure information which is used to maintain the space pres sure to within the setpoint controlband Refer to the table below for the Humidity vs Voltage input values 20 18 16 14 12 10 CURRENT IN mA 0 10 20 30 40 50 60 70 80 90 100 HUMIDITY IN Ventilation Control Module Design special option only The Ventilation Control Module is located in the filter section of the unit and is linked to the unit s UCM
171. hird nameplate is located on the inside of the control panel door Compressor Nameplate The Nameplate for the Scroll Compressor is located on the compressor lower housing Hazard Identification Indicates a potentially hazardous situation which if not avoided could result in death or serious injury CAUTION Indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury It may also be used to alert against unsafe practices A warnine Fiberglass Wool Product contains fiberglass wool Disturbing the insula tion in this product during installation maintenance or repair will expose you to airborne particles of glass wool fibers and ceramic fibers known to the state of California to cause cancer through inhalation Glass wool fibers may also cause respiratory skin or eye irri tation Precautionary Measures Avoid breathing fiberglass dust Use a NIOSH approved dust mist respirator Avoid contact with the skin or eyes Wear long sleeved loose fitting clothing gloves and eye protection Wash clothes separately from other clothing rinse washer thoroughly Operations such as sawing blowing tear out and spraying may generate fiber concentrations requiring additional respiratory protection Use the appropriate NIOSH approved respiration in these situations First Aid Measures Eye Contact Flush eyes with water to remove dust If symptoms pe
172. iagram that shipped with the unit while reviewing the following sequence of operation Fenwal Ignition System 235 amp 350 MBH Natural Gas When a heating requirement exists the Rooftop Module RTM starts the supply fan and sends a request for heat to the Heat Module The Heat Module closes K11 contacts and starts the combustion blower motor 4B11 The com bustion blower motor starts on low speed through the nor mally closed combustion fan relay 4K33 contacts The heat module also closes K12 contacts Power is then sup plied through the supply air flow switch 4S38 the com bustion air flow switch 4S25 the high limit cutout 4S26 and finally through the normally closed sequencing time delay 4DL6 contacts to the pre purge time delay relay 4DL5 The Fenwal ignition control board 4U18 the 60 second sequencing time delay relay 4DL6 and the com bustion blower relay 4K33 will not energize until the pre purge timer 4015 closes its contacts Once closed the Fenwal ignition control board 4U18 energizes the 1st stage solenoid on the gas valve 4L15 the interlock relay 4K32 and the ignition electrode 4E1 A second set of normally open timed closed contacts on the pre purge timer 4DL5 are wired into the 1050 heat fail input in se ries with a normally closed set of contacts on the interlock relay 4K32 When the commonly open contacts on the in terlock relay 4K32 closes it will maintain an electrical path fo
173. ic Heat Actuator 10096 Open Open the main steam or hot water valve supplying the rooftop heater coils 6 Once the configuration for the appropriate heating sys tem is complete press the NEXT key until the LCD dis plays the Start test Sec screen Press the key to designate the delay before the test is to start This ser vice test will begin after the TEST START key is pressed and the delay designated in this step has elapsed Press the ENTER key to confirm this choice Z warnine Rotating Components During installation testing servicing and troubleshoot ing of this product it may be necessary to measure the speed of rotating components Have a qualified or li censed service individual who has been properly trained in handling exposed rotating components per form these tasks Failure to follow all safety precau tions when exposed to rotating components could re sult in death or serious injury 7 Press the TEST START key to start the test Remember that the delay designated in step 6 must elapse before the fan will begin to operate 8 Once the system has started verify that the electric heat or the hydronic heat system is operating properly by us ing appropriate service technics i e amperage readings delta tees etc 9 Press the STOP key at the Human Interface Module in the unit control panel to stop the system operation Gas Furnace Start Up Constant Volume amp Variable Air Volume Syste
174. ic Pressure AIR 1 75 W G 2 00 W G 2 25 W G 2 50 W G CFM RPM BHP RPM BHP RPM BHP RPM BHP 24 000 737 15 66 781 17 54 823 1945 862 21 42 27 000 756 18 53 796 20 51 835 22 59 874 2471 30 000 781 22 18 817 2410 853 26 19 889 28 42 33 000 812 26 63 844 28 57 877 30 61 910 32 79 36 000 848 31 85 877 33 89 905 3598 935 38 14 40 000 897 _ 39 94 926 4224 952 4450 977 46 77 Note Blocked areas identify non standard drive selections 77 Table 4 3 Continued 20 through 75 100 Modulating Exhaust Fan Performance Std Air RPM BHP RPM Negative Static Pressure 1 00 W G RPM 0 25 W G 0 50 W G 0 75 W G BHP RPM BHP 1 25 W G RPM BHP 1 50 W G RPM 1 75 W G 2 00 W G BHP RPM BHP RPM BHP S HF C20 4 000 6 000 8 000 10 000 399 0 38 538 0 75 453 0 74 570 1 17 547 1 59 619 1 81 640 2 79 640 675 711 1 08 1 65 2 48 730 765 797 1 45 2 22 3 01 811 845 1 87 2 78 882 2 34 947 2 88 S HF C25 4 000 399 0 38 538 0 75 6 000 453 0 74 570 1 17 8 000 547 1 59 619 1 81 10 000 640 2 79 712 3 25 12 000 737 4 44 640 675 711 767 1 08 1 65 2 48 3 48 730 765 797 837 1 45 2 22 3 01 4 26 811 845 876 911 1 87 2 78 3 66 5 04 882 912 947 2 34 3 27 4 40 947 975 2 88 3 77 1017 1036 3 55 4 30 S HF C30 4 000 399 0 38 538 0 75 6 000 453 0 74 570 1 17 8 000 547 1 59
175. in 3 0 3 6 3 41 2 378 51 2 31 4 4 A 3 8 4 8 31 2 5 41 2 61 4 33 4 43 4 5 0 7 0 4 5 1 2 5 6 7 8 41 4 51 4 3 4 4 2 4 51 2 53 4 8 41 2 51 2 44 56 51 8 71 8 612 91 8 53 4 71 4 5 8 8 8 63 8 83 4 738 101 8 7 8 3 4 Deflection Force Lbs 358 358 Gripnotch Belt Gripbelts Belts Cross Small P D Section Range Min Max Min Max 44 87 10 15 5V 7 1 10 9 101 2 153 4 1278 183 4 11 8 16 0 13 19 1 2 15 22 Scroll Compressor Replacement The compressor manifold system was purposely designed to provide proper oil return to each compressors The refrig erant manifold system must not be modified in any way Note Altering the compressor manifold piping may cause oil return problems and compressor failure Should a compressor replacement become necessary and a suction line filter drier is to be installed install it a mini mum of 18 inches upstream of the oil separator tee See Figure 5 2 Figure 5 2 Suction Line Filter Drier Installation TOP VIEW Compressor Bracket Do Not Remove 30 Ton Compressor Pair Illustrated Oil Separator Tee Anytime a compressor is replaced the oil for each com pressor within the manifolded set must be replaced The scroll compressor uses Trane OIL 42 without substitu tion The appropriate oil charge for a 9 and 10 Ton scroll compressor is 8 5 pints For a 14 and 15 Ton scroll com pressor use 13 8 pints Note Do Not release refrigerant to the atmosphere If adding
176. int ranges between 40 and 80 Fahrenheit The warm up setpoint ranges between 50 and 90 degrees Fahrenheit with a 2 degrees deadband The Un occupied cooling setpoint ranges between 45 and 98 degrees Fahrenheit The heating setpoint ranges between 43 and 96 degrees Fahrenheit Two liquid crystal displays LCD display zone temperature temperature setpoints week day time and operational mode symbols The DIP switches on the subbase are used to enable or dis able applicable functions i e Morning Warm up Econo mizer 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 is activated See Table 3 10 for the Tempera ture vs Resistance coefficient Constant Volume Zone Panel 5U68 BAYSENS008B This electronic sensor features four system switch settings Heat Cool Auto and Off and two fan settings On and Auto It is a manual or automatic changeover control with dual setpoint capability Variable Air Volume System Controls Remote Panel w NSB 5U58 BAYSENS020B This 7 day programmable sensor features four periods for Occupied Unoccupied programming per day Either one or all four periods can be programmed If the power is inter rupted the program is retained in pe
177. ion of the unit The damper linkage con necting the fresh air dampers to the return air dampers is preset from the factory in the number 1 position Refer to Table 4 5 for the appropriate linkage position for the unit and operating airflow CFM N wARNING No Step Surface Do not walk on the sheet metal drain pan Walking on the drain pan could cause the supporting metal to col lapse Failure of the drain pan could result in death or serious injury Note Bridging between the unit s main supports may consist of multiple 2 by 12 boards or sheet metal grating Arbitrarily adjusting the fresh air dampers to open fully when the return air dampers are closed or failing to main tain the return air pressure drop with the fresh air dampers when the return air dampers are closed can overload the supply fan motor and cause building pressurization control problems due to improper CFM being delivered to the space The fresh air return air damper linkage is connected to a crank arm with a series of holes that allows the installer or operator to modify the amount of fresh air damper travel in order to match the return static pressure Refer to Table 4 5 for the equivalent return air duct losses that corre spond to each of the holes illustrated in Figure 4 5 To Adjust the Fresh Air Damper Travel 1 Drill a 1 4 hole through the unit casing up stream of the return air dampers Use a location that will produce an accurate reading with t
178. l 3 Measure the discharge and suction pressure psig next to the compressor 4 Plot the outdoor dry bulb temperature and the operating suction pressure psig onto the chart 5 At the point of intersection read to the left for the discharge pressure The measured discharge pressure should be within 7 psig of the graph 105 Ton Standard Hi Cap Operating Pressure Curve All Compressors and Condenser Fans per ckt COOLING CYCLE PRESSURE CURVE Based on Indoor Airflow of 400 CFM Ton FULL LOAD 380 360 340 o 105 F OD Ambient 0 320 2 300 95 OD Ambient o 280 ul 85 F OD Ambient 260 lt 5 240 75 OD Ambient o 220 65 F Ambient 200 180 50 55 60 65 70 75 80 85 90 95 100 SUCTION PRESSURE PSIG To Check Operating Pressures 1 Start the unit and allow the pressures to stabilize 2 Measure the outdoor air dry bulb temperature F entering the condenser coil 3 Measure the discharge and suction pressure psig next to the compressor 4 Plot the outdoor dry bulb temperature and the operating suction pressure psig onto the chart 5 At the point of intersection read to the left for the discharge pressure The measured discharge pressure should be within 7 psig of the graph 91 Table 4 6 Continued 115 Operating Pressure Curve
179. l Oil should be visible in the compressor oil sight glass The oil level should be 1 2 to 3 4 high in the sight glass with the com pressor Off Verify that the compressor discharge service valve and the liquid line service valve is back seated on each cir cuit CAUTION Compressor Damage Do not allow liquid refrigerant to enter the suction line Excessive liquid accumulation in the liquid lines may result in compressor damage Compressor service valves must be fully opened before start up suction discharge liquid line and oil line Do not start the unit in the cooling mode if the ambient tem perature is below the following minimum recommended op erating temperatures Standard unit with or without HGBP 55 for 20 amp 40 Ton 50 F for 25 amp 30 Ton 45 for 70 thru 130 Ton 40 F for 55 Ton 35 for 50 Ton 30 for 60 Ton Unit Start Up Continued Units with Low Ambient option without HGBP 0 F Units with Low Ambient option with HGBP 10 Note To prevent compressor damage due to no refrigerant flow do not pump the system down with the compressor s below 7 PSIG under any circumstance Check the supply fan belts for proper tension and the fan bearings for sufficient lubrication If the belts require adjustment or if the bearings need lubricating refer to the Service Maintenance section of this manual for in structions Inspect the interior of the unit for tools and debris In
180. lay 4K33 which switches the combustion blower motor to high speed and energizes the 2nd stage solenoid on the gas valve 4L7 after approximately 60 seconds If the flame rod 4U19 does not detect a pilot flame within the 10 second trial for ignition period the control will lock out If a flame failure occurs during operation the gas valve 4L7 the sequencing time delay relay 4DL6 and the combustion blower relay 4K33 is de energized The sys tem will purge and attempt to relight the pilot If a flame is not detected after this attempt the Honeywell ignition con trol 4U18 will lock out The combustion blower motor will continue to operate as long as a heating demand exists and the system switch 4S24 is On Once the heating demand has been satisfied the combus tion blower and the Honeywell ignition control board 4U18 is de energized Propane Gas Units that operate on propane gas after 1990 have two 2 additional controls that affect the combustion blower motor operation and the sequence of the gas valve operation With the post purge time delay relay 4DL4 the additional service switch 4S24 and the additional 115 volt control re lay 4K31 installed the sequence of operation is as fol lows Power is applied to the Honeywell ignition control board 4U18 through the high limit switch 4S26 The Honeywell ignition control board 4U18 will sequence through its pre purge timing and pilot ignition sequence
181. ld have extended lines from the vent ports to the atmosphere or connect each vent line to the return pipe on the discharge side of the steam traps 7 Install a Gate type valve in the supply branch line as close as possible to the steam main and upstream of any other device 8 Install a Gate type valve in the return branch line as close as possible to the condensate return main and downstream of any other device 9 Install a strainer as close as possible to the inlet of the control valve and steam trap s 10 Steam trap selection should be based on the maximum possible condensate flow and the recommended load factors 11 Install a Float and Thermostatic FT type trap to main tain proper flow They provide gravity drains and continu ous discharge operation FT type traps are required if the system includes either a an atmospheric pressure gravity condensate return Or b a potentially low pressure steam supply 35 In 12 Position the outlet or discharge port of the steam trap at least 12 below the outlet connection on the coil s This will provide adequate hydrostatic head pressure to over come the trap losses and assure complete condensate removal 40 through 130 Ton units Utilizes two steam coils stacked together These two coils must be piped in a parallel arrangement steps listed below should be used in addition to the previous steps Fig ure 3 13 illustrates the recommended piping configurati
182. less the 151 stage bank of heat ing elements already operating are not satisfying the heat ing load 58 Unit Start Up Continued Wet Heat Sequence of Operation Electrical circuitry for units with steam or hot water heat is limited to the connections associated with the modulating valve actuator 4U15 and the freezestat 4S12 Like the furnaces described earlier SL SH control systems are wired to ensure that simultaneous heating and cooling do not occur The supply fan will cycle On and Off with each call for heat during both an occupied and unoccupied period Whenever there is a call for heat 1U50 K3 energizes This allows a modulated voltage signal to be sent to the Wet heat actuator 4U15 Depending on the value of this signal 4U15 regulates the flow of steam or hot water through the coil by positioning the valve stem at some point between fully closed 6 VDC and fully open 8 5 VDC Freeze Protection A freezestat 4S12 is mounted inside the heat section of SLH_ and SSH_ units to prevent the wet heat coil from freezing during the Off cycle the temperature of the air leaving the heating coils falls to 40 F the freezestat s normally open contacts close com pleting the heat fail circuit on the UCM When this occurs a The supply fan is turned Off b Wet heat actuator 4U15 fully opens to allow hot water or steam to pass through the heating coil and prevent freeze up c A Heat Fail
183. lly open when the pressure differential across the filters decrease to 0 4 w c The switch differential can be field adjusted between 0 17 W C to 5 0 w c 0 05 w c Supply and Exhaust Airflow Proving Switches 3568 and 3S69 3S68 is a binary input device used on CV amp VAV applica tions to signal the RTM when the supply fan is operating It is located in the supply fan section of the unit and is con nected to the RTM 1U48 During a request for fan opera tion if the differential switch is detected to be open for 40 consecutive seconds compressor operation is turned Off heat operation is turned the request for supply fan op eration is turned Off and locked out IGV s if equipped are closed exhaust dampers if equipped are closed economizer dampers if equipped are closed and a manual reset diagnostic is initiated 3569 is binary input device used all units equipped with an exhaust fan It is located in the exhaust fan section of the unit and is connected to the RTM 1U48 During a request for fan operation if the differential switch is detected to be open for 40 consecutive seconds the economizer is closed to the minimum position setpoint the request for exhaust fan operation is turned Off and locked out and a manual reset diagnostic is initiated The fan fail ure lockout can be reset at the Human Interface located in the unit s control panel by Tracer or by cycling the c
184. location of these drain connections A condensate trap must be installed due to the drain con nection being on the negative pressure side of the fan In stall the P Traps at the unit using the guidelines in Figure 3 6 Pitch the drain lines at least 1 2 inch for every 10 feet of horizontal run to assure proper condensate flow Do not al low the horizontal run to sag causing a possible double trap condition which could result in condensate backup due to air lock Units with Gas Furnace Units equipped with a gas furnace have a 3 4 CPVC drain connection stubbed out through the vertical support in the gas heat section It is extremely important that the conden sate be piped to a proper drain Refer to the appropriate il lustration in Figure 3 2 for the location of the drain connec tion Note Units equipped with an optional modulating gas furnace will likely operate in a condensing mode part of the time An additional 1 1 4 non connectable water drain is located in the base rail within the heating section Ensure that all condensate drain line installations comply with applicable building and waste disposal codes Figure 3 6 Condensate Trap Installation Shipping Fasteners Condensate Channel Evaporator Section Base Rail 1 Inch 8 HF units 1 1 4 Inch NPT S HG units Female Connection Field Supplied Condensate Piping 4 5 Inches 2 25 Inches NEM Cleanout ug PI
185. ment is necessary If the CO is outside this range it indicates incomplete combustion due to inadequate air or exces sive gas The pressure ratio and bias adjustment screws are lo cated on top of the regulator under a sealed plate The actual settings can be seen through windows on each side of the regulator Refer to the illustration in Figure 4 9 Note The burner capacity is controlled by the movement of the air damper This has been preset at the factory and normally does not need field adjustment The combustion quality air gas is controlled by the settings on the regulator the plus and minus indications relate to the change in gas flow 7 Set the air gas ratio to the desired value using the 1 ad justment screw until the optimum values between 8 0 and 9 5 are obtained course setting 8 Use Table 4 1 to program the minimum 5 firing rate Allow the system to operate for approximately 10 min utes 9 Use a carbon dioxide analyzer and measure the percent age of carbon dioxide in the flue gas If the measured carbon dioxide level is between 6 0 and 8 0 justment is necessary If an adjustment is needed turn the 2 adjustment screw on the regulator in the Plus direction to increase the CO and in the Minus direc tion to decrease the Refer to the illustration in Fig ure 4 9 for the adjustment screw location Note It is normal for the low fire CO to be lower than the high fi
186. mote Zone Sensor sse 46 request for exhaust fan operation 8 request for supply fan operation 8 requesting service 2 4 required number of conductors 49 53 See Figure 3 16 Figure 3 17 Return Air Humidity Sensor 9 Return Air Humidity Sensor 3U64 8 return air temperature reaches 135 F 10 u ciet crees 7 RTM Resistance Input vs Setpoint Temperatures 7 RTM Resistance Value vs System Operating Mode 7 5 Sample Model 4 5 Sample Operator s Maintenance Log 110 See Table 5 8 Saturated Condenser Temperature Sensors 9 saturated condensing temperature falls 9 Scroll Compressor Replacement 105 See Figure 5 2 Service Test Guide for Component Operation 61 See Table 4 1 Shipwith Locations 11 Sizing Natural Gas Pipe Mains amp Branches 33 See Table 3 4 some fans are rotating backwards 63 See Fan Rotation Space Pressure Transducer
187. ms It is important to establish and maintain the appropriate air fuel mixture to assure that the gas furnace operates safely and efficiently Since the proper manifold gas pressure for a particular in stallation will vary due to the specific BTU content of the lo cal gas supply adjust the burner based on carbon dioxide and oxygen levels The volume of air supplied by the combustion blower deter mines the amount of oxygen available for combustion while the manifold gas pressure establishes fuel input By mea suring the percentage of carbon dioxide produced as a by product of combustion the operator can estimate the amount of oxygen used and modify the air volume or the gas pressure to obtain the proper air fuel ratio Arriving at the correct air fuel mixture for a furnace results in rated burner output limited production of carbon monoxide and a steady flame that minimizes nuisance shutdowns N WARNING Hazardous Gases and Flammable Vapors Exposure to hazardous gases from fuel substances have been shown to cause cancer birth defects or other reproductive harm Improper installation adjust alteration service or use of this product could cause flammable mixtures To avoid hazardous gases and flammable vapors follow proper installation and set up of this product and all warnings as provided in this manual Failure to follow all instructions could result in death or serious injury When using dry nitrogen cyli
188. n a VAV units is equipped with Modulating Heat and the system is in an occupied mode and the field supplied changeover relay contacts 5K87 have closed the supply air temperature will be controlled to the customer specified supply air heating setpoint It will remain in the heating sta tus until the changeover relay contacts are opened Occupied Cooling Supply Air Temperature When a VAV unit is in the occupied mode the supply air temperature will be controlled to the customers specified supply air cooling setpoint by modulating the economizer and or staging the mechanical cooling On and Off as re quired The changeover relay contacts must be open on units with Modulating Heat for the cooling to operate Daytime Warm up On VAV units equipped with heat if the zone temperature falls below the daytime warm up initiate temperature dur ing the occupied mode the system will switch to full air flow During this mode the VAV box unocc relay RTM K3 will be energized this is to signal the VAV boxes to go to 100 After the box max stroke time has elapsed factory set at 6 minutes the VFD IGV output will be set to 100 The airflow will be at 100 and the heat will be turned on to control to the occupied heating setpoint When the zone temperature reaches the daytime warm up termination setpoint the heat will be turned off the K3 re lay will be de energized releasing the VAV boxes the VFD IGV output will go back to duct st
189. n for the gas pressure sensing line 5 Connection for the air pressure sensing line 6 Stroke indication Note There are no serviceable parts on the SKP70 actuator Should it become inoperative replace the actuator Figure 4 10 Typical Gas Damper Stop Bolt Min Rate Full Mod 5Z PET welded Stop Limited Mod at 33 ETE Max Rate approx 100 Min Rate Limited Mod 33 N N y EM Combustion Air Damper Adjustment Combustion Fan Proving Switch Unit Start Up Continued Final Unit Checkout After completing all of the checkout and start up procedures outlined in the previous sections i e operating the unit in each of its Modes through all available stages of cooling and heating perform these final checks before leaving the unit Close the disconnect switch or circuit protector switch that provides the supply power to the unit s terminal block 1TB1 or the unit mounted disconnect switch 1514 waRNING Hazardous Voltage Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvert ently energized Failure to disconnect power before ser vicing could result in
190. n the vertical support 5 Attach one end of the 2 x 3 16 O D factory provided pneumatic tubing to the sensor s top port and the other end of the tubing to the connector in the vertical support Discard any excess tubing Units with StatitracTM 6 Open the filter access door and locate the DSP control devices illustrated in Figure 3 9 There are three tube connectors mounted on the left of the solenoid and transducers Connect one end of the field provided 3 16 O D pneumatic tubing for the space pressurization con trol to the bottom fitting Route the opposite end of the tubing to a suitable location inside the building This lo cation should be the largest open area that will not be af fected by sudden static pressure changes Installation Continued Figure 3 9 OUTSIDE AIR SENSING KIT Top Port Connection 2 X 3 16 OD ee 29 Factory Provided Pneumatic Tubing Field Installed Outside Air _ Pressure Sensor ensor Mounting racket 8442224 Installed Tubing Connector Mn racket in vertical Support Calibration Solenoid DUCT amp SPACE PRESSURE TRANSDUCER TUBING SCHEMATIC Space Static Duct Static Transducer Transducer LO HI LO HI HF Sensing Tube to Discharge Static Pressure Sensing Location Calibration Solenoid ra Sensing Tube to Outside Air Reference Sensing Tube to Space Sensing Loc
191. n this step has elapsed Press the ENTER key to confirm this choice wARNING Rotating Components Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvert ently energized Failure to disconnect power before ser vicing could result in death or serious injury 9 Press the TEST START key to start the test Remember that the delay designated in step 8 must elapse before the system will begin to operate 10 Once each compressor or compressor pair has started verify that the rotation is correct If a scroll compressor is rotating backwards it will not pump and a loud rattling sound can be observed Check the electrical phasing at the load side of the compressor contactor If the phasing is correct before condemning the compressor inter change any two leads to check the internal motor phas ing If the compressor runs backward for an extended period 15 to 30 minutes the motor winding can over heat and cause the motor winding thermostats to open This will cause compressor trip diagnostic and stop the compressor 11 Press the STOP key at the Human Interface Module in the unit control panel to stop the compressor operation 12 Repeat steps 5 through 11 for each compressor stage and the appropriate condenser fans Refrigerant Charging 1 Attach a set of service gauges onto the suction and dis charge ga
192. nd 1 The furnace will not light unless the manual gas valves are open and the control circuit switch 4S24 is closed 2 The control systems are wired to ensure that heating and cooling cannot occur simultaneously 3 The unit supply fans must run continuously so air flow switch 4538 will stay closed 4 Modulating Gas heat is available during both occupied and unoccupied operation Whenever there is a call for heat 1U50 K1 energizes and combustion blower motor 4B11 begins to operate at High speed on the 850 and 1000 MBH heaters The blower will operate on low speed for the 500 MBH A relay 4K119 in parallel with the main gas valve actuator control output in sures the actuator will be open prior to proof of flame This will force the combustion air actuator 4U82 to the open po sition causing the auxiliary switch on 4U82 to close This insures complete purging of the combustion chamber during the 60 second purge cycle Ignition control IC board 4U18 will not energize however unless the supply air flow switch 4538 combustion air flow switch 4525 high limit cutout 4S26 the auxiliary switch on combustion air actuator 4U82 and the proof of closure switch on gas valve 4L22 are closed These are all part of the safety interlock system With all these conditions satisfied the IC board energizes and initiates an internal 60 second pre purge time delay When the pre purge period expires 4U18 energizes both the ignition transformer
193. ndard Evaporator Coil Wet Airside Pressure Drop at 0 075 Ib cu ft 70 130 Ton Ton Standard Evaporator Coil 9 Ao AS r ak 1 E 5 09 08 4 lt lt ex 5 2 0 5 amp lt ev S o4 7 lt 0 3 0 2 20000 30000 40000 50000 60000 Unit Airflow Dry Airside Pressure Drop at 0 075 Ib cu ft 70 through 130 Ton Standard Evaporator Coil Dry Airside Pressure Drop at 0 075 Ib cu ft 70 130 Ton Ton Standard Evaporator Coil 1 5 09 08 Y s nk 07 5 0 6 2 lt 05 5 0 4 lt lt ES 9 ex 0 3 5 0 2 20000 30000 40000 50000 Unit Airflow 71 Figure 4 3 Continued Wet Airside Pressure Drop at 0 075 Ib cu ft 20 through 105 Ton Hi Cap Evaporator Coil Hi Cap Not Available on 115 amp 130 Ton Units Wet Airside Pressure Drop at 0 075 Ib cu ft 20 105 Ton Hi Cap Evaporator Coil Hi Cap Not Available on 115 amp 130 Ton Units
194. nders for pressurizing units for leak testing always provide a pressure regula tor on the cylinder to prevent excessively high unit pressures Never pressurize unit above the maximum recommended unit test pressure as specified in appli cable unit literature Failure to properly regulate pres sure could result in a violent explosion which could re sult in death or serious injury or equipment or prop erty only damage Two Stage Gas Furnace High Fire Adjustment 1 Use Table 4 1 to program the following system compo nents for operation by scrolling through the Human Inter face displays Gas Heat Supply Fan On Inlet Guide Vanes 100 Open if applicable Variable Frequency Drive 100 Output if applicable RTM Occ Unocc Output Unoccupied Heat Stages 1 amp 2 On Turn the 115 volt control circuit switch 4S24 located in the heater control panel to the On position Open the manual gas valve located in the gas heat section 2 Once the configuration for the appropriate heating sys tem is complete press the NEXT key until the LCD dis plays the Start test __ screen Press the key to designate the delay before the test is to start This ser vice test will begin after the TEST START key is pressed and the delay designated in this step has elapsed Press the ENTER key to confirm this choice 3 Press the TEST START key to start the test Remember that the delay designated in step 2 must elapse before
195. ndi tions the initial flow rate of the compressor is low due to the low condensing pressure This causes a low differential across the thermal expansion valve that limits its capacity Under these conditions it is not unusual to hear the com pressor rattle until the suction pressure climbs and the flow rate increases 83 4 6 Locations 20 30 TON n 40 60 TON nn or 70 75 TON 299 90 105 TON imm Compressor B J Designator K10 Compressor A Designator Compressor 2B Ja gr Designator Compressor 2A Ja Designator K4 Compressor 1B Ja Designator K11 28 Compressor 1A Designator K12 Compressor 2C Ja ui Designator K3 Compressor 2B Designator Compressor 2A EL Compressor 1C Designator 11 Compressor 1B HI Designator 12 Compressor 1A Compressor 2C Designator K3 Compressor 2B Designator Compressor 2A ______ Compressor 1C Designator 11 1 Designator K12 RO
196. nections 3 locations Steam Trap Float amp Thermostatic Type 3 locations Air Vent A 2 Way Modulating Valve n Field Installed Strainer Supply Soe os 6 H Steam INLET 4 Gate Valve Steam Trap OUTLET Strainer Float and Thermostatic Type Return 2 Way Modulating Valve Vacuum TRE Breaker 2 locations 6 11 Gate 1 locations 3 estona OUT 2 locations Use same size pipe as Steam Main Strainer p 12 Minimum both Outlets Use same size pipe Coil Connection 2 locations 37 Disconnect Switch External Handle Factory Mounted Option Units ordered with the factory mounted disconnect switch comes equipped with an externally mounted handle This allows the operator to disconnect power from the unit with out having to open the control panel door The handle loca tions and its three positions are shown below ON Indicates that the disconnect switch is closed allowing the main power supply to be applied at the unit OFF Indicates that the disconnect switch is open interrupting the main power supply to the unit controls OPEN COVER RESET Turning the handle to this position releases the handle from the disconnect switch allowing the control panel door to
197. ng live electrical components perform these tasks Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury 7 Press the TEST START key to start the test Remember that the delay designated in step 6 must elapse before the fan will begin to operate 8 With the IGV s VFD at 100 and the supply fan operat ing at full airflow capability measure the amperage at the supply fan contactor 1K16 amp 1K15 additional contactor for 90 through 130 Ton units If the amperage exceeds the motor nameplate value the static pressure is less than design and the airflow is too high If the amperage is below the motor nameplate value static pressure may be too high and CFM may be too low To determine the actual CFM 5 a Measure the actual fan RPM b Calculate the Theoretical BHP Actual Motor Amps X Motor HP Motor Nameplate Amps c Plot this data onto the appropriate Fan Performance Curve in Figure 4 4 Where the two points intersect read straight down to the CFM line Use this data to assist in calculating a new fan drive if the CFM is not at design specifications An alternate method with less accuracy is to measure the static pressure drop across the evaporator coil This can be accomplished by a drilling a small hole through the unit casing on each side of the coil Note Coil damage can occur if care is not taken when drilling holes in this
198. nit Description Each Trane commercial single zone rooftop air conditioner ships fully assembled and charged with the proper refriger ant quantity from the factory An optional roof curb specifically designed for the 5 HF and S HG units is available from Trane The roof curb kit must be field assembled and installed according to the lat est edition of SAHF IN 5 or SXHG IN 2 respectively Trane Commercial Rooftop Units are controlled by a micro electronic control system that consists of a network of mod ules and are referred to as Unit Control Modules UCM The acronym UCM is used extensively throughout this document when referring to the control system network These modules through Proportional Integral control algo rithms perform specific unit functions which provide the best possible comfort level for the customer They are mounted in the control panel and are factory wired to their respective internal components They receive and interpret information from other unit modules sensors remote panels and customer binary contacts to satisfy the applicable request for economizing mechanical cooling heating and ventilation Refer to the following discussion for an explanation of each module function RTM 1048 Standard units The Rooftop Module RTM responds to cooling heating and ventilation requests by energizing the proper unit com ponents based on information received from other unit mod
199. njury HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK 1TB1 OR UNIT DISCONNECT SWITCH 1514 59 Observe the phase indicator lights the face of the sequencer The ABC indicator light will glow if the phase is ABC If the CBA indicator light glows open the disconnect switch or circuit protection switch and reverse any two power wires Restore the electrical power and the phasing If the phasing is correct open the disconnect switch or circuit protection switch and remove the phase sequence indicator Voltage Supply and Voltage Imbalance Voltage Supply Electrical power to the unit must meet stringent require ments for the unit to operate properly Measure each leg phase to phase of the power supply Each reading must fall within the utilization range stamped on the unit name plate If any of the readings do not fall within the proper tol erances notify the power company to correct this situation before operating the unit A warnine Live Electrical Components During installation testing servicing and troubleshoot ing of this product it may be necessary to work with live electrical components Have a qualified licensed electri cian or other individual who has been properly trained in handling live electrical components perform these tasks Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serio
200. o facilitate a uniform lift Table 3 3 list the typical unit operating weights 3 Test lift the unit to ensure it is properly rigged and bal anced make any necessary rigging adjustments 4 Lift the unit and position it over the curb and pedestal These units have a continuous base rail around the air handler section which matches the curb 5 Align the base rail of the unit s air handler section with the curb rail while lowering the unit onto the curb Make sure that the gasket on the curb is not damaged while positioning the unit The pedestal simply supports the unit s condenser section A cross section of the juncture between the unit and the roof curb is shown in Figure 3 5 23 Figure 3 4 Typical Unit Rigging Typical 90 through 130 Ton Unit Typical 20 through 75 Ton Unit Lifting 120 Spreader Barg Figure 3 5 Unit Base amp Roof Curb Section Unit all Lifting Lug Ships With Curb Field Installed Gasket 2 1 2 2 X 4 Nailer Furnished with Kit 3 8 _1 7 16 Roof Curb L 2 13 167 lt 19 32 24 General Unit Requirements The checklist listed below is a summary of the steps re quired to successfully install a Commercial rooftop unit This checklist is intended to acquaint the installing person nel with what is required in the inst
201. on and de energize the hot gas bypass valves before taking performance mea surements Unit Start Up Continued With the unit operating at Full Circuit Capacity acceptable subcooling ranges between 14 F to 22 F Measuring Subcooling 1 At the liquid line service valve measure the liquid line pressure Using a Refrigerant 22 pressure temperature chart convert the pressure reading into the correspond ing saturated temperature 2 Measure the actual liquid line temperature as close to the liquid line service valve as possible To ensure an accu rate reading clean the line thoroughly where the tem perature sensor will be attached After securing the sen sor to the line insulate the sensor and line to isolate it from the ambient air Note Glass thermometers do not have sufficient contact area to give an accurate reading 3 Determine the system subcooling by subtracting the ac tual liquid line temperature measured in step 2 from the saturated liquid temperature converted in step 1 Low Ambient Dampers Operation Low Ambient Dampers are available as a factory installed option on 20 75 Ton units or can be field installed Damp ers are used to extend the operation of these units from the standard operational temperatures to a minimum of OF without hot gas bypass or 10 F with hot gas bypass These values apply when wind speed across the condenser coil is less than 5 m p h If typical wind speeds are higher than 5 m
202. on for the steam coils Figure 3 12 Hot Water Piping 20 through 75 Ton stallation Continued 13 Install a strainer in each return line before the steam trap 14 Trap each steam coil separately as described in steps 10 and 11 to prevent condensate backup in one or both coils 15 In order to prevent condensate backup in the piping header suppling both coil sections a drain must be in stalled utilizing a strainer and a steam trap as illustrated in Figure 3 13 3 Way Modulating Valve Field Installed A y AB d Return W Ln Water Air Vent i OUTLET Pressure Drop Bypass Gate Valves Balancing Globe Hot Water Coil Valve ARI Listed m INLET Strainer E Suppl
203. ontrol power to the RTM 1570 Lead Lag Is a selectable mode of operation on 40 thru 130 Ton units within the Human Interface It alternates the starting be tween the first compressor of each refrigeration circuit Only the compressor banks will switch not the order of the com pressors within a bank providing the first compressor in each circuit had been activated during the same request for cooling Supply and Exhaust Fan Circuit Breakers 1CB1 1CB2 The supply fan and exhaust fan motors are protected by cir cuit breakers 1CB1 and 1CB2 respectively They will trip and interrupt the power supply to the motors if the current exceeds the breaker s must trip value The rooftop module RTM will shut all system functions Off when an open fan proving switch is detected Low Pressure Control Is accomplished using a binary input device on CV amp VAV applications LP cutouts are located on the suction lines near the scroll compressors The LPC contacts are designed to close when the suction pressure exceeds 22 4 psig If the LP control is open when compressor is requested to start none of the com pressors on that circuit will be allowed to operate They are locked out and a manual reset diagnostic is initiated The LP cutouts are designed to open if the suction pressure approaches 7 4 psig If the LP cutout opens after a com pressor has started all compressors operating on that cir cuit will be turned off imm
204. or removing refrigerant is required the service technician must comply with all Federal State and local laws Refer to general service bulletin MSCU SB 1 latest edition Common Suction Line from Evaporator Minimum 18 straight unobstructed piping between the Suction Filter Drier and the first Oil Separator Tee 105 Service amp Maintenance Continued Table 5 8 Supply and Exhaust Fan VFD Programming Parameters Setting 103 Motor Voltage Set Based on Motor Nameplate tar 20012 30V etna 50hz applications Motor Current Set Based on Motor Nameplate Sets the motor FLA Set only for applications using 3hp Hi Efficiency motors Set to 2 2 kW Load amp Motor Motor RPM _ Set Based on Motor Nameplate Sets the motor RPM Reference amp 215 Current Limit 1 x Rated Current Limits Limits the maximum current to motor These parameters are motor specific and the actual motor nameplate rating must be used Do not use the unit name plate values ZA warnine Hazardous Voltage w Capacitors Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power cannot be inadvertently energized For variable frequency drives or other en ergy storing components provided by Trane or others refer to the appropriate manufacturer s literature for al lowable waiting periods for discharge of capacitors
205. oth S HF C30 Evaporator wavy 3B 0 5 3 148 24 40 Evaporator wavy 3B 0 5 4 148 24 40 1 38 0 375 3 168 46 30 smooth S HF C40 Evaporator wavy 3B 0 5 2 148 32 50 FF Hi Cap Evaporator wavy 3B 0 5 4 148 32 50 FF Condenser 38 0 375 3 168 63 20 smooth S HF C50 Evaporator waw 3B 0 5 3 148 37 90 FF Hi Cap Evaporator wavy 3B 0 5 4 148 37 90 1 waw 3B 0 3 5 3 168 70 00 smooth S HF C55 Evaporator waw 3B 0 5 3 148 37 90 FF Hi Cap Evaporator wavy 3B 0 5 4 148 37 90 FF Condenser 38 0 375 4 144 70 00 smooth S HF C60 Evaporator wavy 3B 0 5 2 164 43 10 wavy 3B 0 5 4 148 43 10 1 38 0 375 4 168 88 00 S HF C70 Evaporator 3 0 5 3 180 43 10 FF Hi Cap Evaporator n a n a n a n a n a Condenser 38 0 375 4 168 88 00 smooth S HF C75 Evaporator waw 3B 0 5 4 148 43 10 Evaporator wavy 3B 0 5 5 148 43 10 1 waw 3B 0 375 4 168 88 00 smooth S HG C90 Evaporator waw 3B 0 5 3 148 59 30 FF Hi Cap Evaporator wavy 3B 0 5 5 148 59 30 FF Condenser 38 0 375 3 156 152 00 smooth S HG DTT Evaporator wavy 3B 0 5 3 180 60 40 Evaporator wavy 3B 0 5 5 148 60 40 FF Condenser waw 3B 0 375 4 156 152 00 smooth S HG D12 Evaporator wavy 3B 0 5 5 148 60 40 I F Hi Cap Evaporator n a n a n a n a n a n a Condenser waw 3B 0 375 4 1
206. ppli cable unit literature Failure to properly regulate pres sure could result in a violent explosion which could re sult in death or serious injury or equipment or prop erty only damage Verify that the ignition system operates properly Coil Cleaning Regular coil maintenance including annual cleaning en hances the unit s operating efficiency by minimizing compressor head pressure and amperage draw water carryover fan brake horsepower and static pressure losses At least once each year or more often if the unit is located in a dirty environment clean the evaporator and con denser coils using the instructions outlined below Be sure to follow these instructions as closely as possible to avoid damaging the coils CAUTION Coil Cleaners Coil cleaners can damage roofs surrounding buildings vehicles etc Cleaning substances should be checked to ensure that they will not cause damage to surround ings Coils and roof if applicable should berinsed thor oughly Do not spray coil cleaners in windy conditions Refrigerant Coils To clean refrigerant coils use a soft brush and a sprayer either a garden pump up type or a high pressure sprayer A high quality detergent is also required suggested brands include SPREX A C OAKITE 161 OAKITE 166 and COILOX If the detergent selected is strongly al kaline pH value exceeds 8 5 add an inhibitor 1 Remove the access panels on bot
207. pressure Note Do not adjust the combustion air damper while the furnace is operating at low fire 4 Check the carbon dioxide levels after each adjustment 5 Press the STOP key at the Human Interface Module in the unit control panel to stop the system operation 95 Table 4 7 Recommended Manifold Pressures and Levels during Operation Notes Furnace MBH Firing Manifold Stage Rate CO2 Pressure High Fire 235 100 8 5 9 5 3 0 3 5 Low Fire 117 50 6 0 7 0 0 9 High Fire 350 100 8 5 9 5 3 0 3 5 Low Fire 175 50 6 0 7 0 0 9 High Fire 500 100 8 5 9 5 3 0 3 5 Low Fire 250 50 6 0 7 0 1 25 High Fire 850 100 8 5 9 5 3 0 3 5 Low Fire 500 59 6 0 7 0 1 25 High Fire 1000 100 8 5 9 5 3 0 3 5 Low Fire 500 50 6 0 7 0 1 25 Manifold pressures are given in inches w c High fire manifold pressure is adjustable on all heaters Low fire manifold pressure is non adjustable on 235 MBH and 350 MBH heaters Table 4 8 Natural Gas Combustion Curve Ratio of Oxygen to Carbon Dioxide in percent 18 17 Figure 4 7 Flue Gas Carbon Dioxide amp Oxygen Measurements Flue Vent 16 15 14 13 Curve Fuel 1 000 BTU per ft of Natural Gas Test Probe 4 Minimum 12 11 10 Percent Carbon Dioxide N G b QO NOC 0123 4 5 6 7 8 9 1011
208. priate SAHF PTG manual for CV or VAV ap plications for the SERVICE TEST screens and program ming instructions 5 Use Table 4 1 to program the unit Fans for operation by scrolling through the displays All of the Fans Supply Exhaust and Condenser fans can be programed to be if desired Verify proper fan rotation for VFDs with bypass Refer to Figure 4 1 for the condenser fan locations and the Human Interface designator 6 Once the configuration for the Fans is complete press the NEXT key until the LCD displays the Start test in __ screen Press the key to designate the delay before the test is to start This service test will begin after the TEST START key is pressed and the delay desig nated in this step has elapsed Press the ENTER key to confirm this choice waRNING Rotating Components During installation testing servicing and troubleshoot ing of this product it may be necessary to measure the speed of rotating components Have a qualified or li censed service individual who has been properly trained in handling exposed rotating components per form these tasks Failure to follow all safety precau tions when exposed to rotating components could re sult in death or serious injury 7 Press the TEST START key to start the test Remember that the delay designated in step 6 must elapse before the fans will begin to operate 8 Check the supply fan and the exhaust fans if equippe
209. r cycling on internal winding thermostat which leads to compressor motor failure b Lowers the efficiency of the evaporator by reducing the heat transfer capability Tables are based on outdoor ambient between 65 amp 105 F relative humidity above 40 percent Measuring the operat ing pressures can be meaningless outside of these ranges Measuring Superheat 1 Measure the suction pressure at the suction line gauge access port located near the compressor 2 Using a Refrigerant Temperature chart convert the pres sure reading to a corresponding saturated vapor tem perature 3 Measured the suction line temperature as close to the expansion valve bulb as possible 4 Subtract the saturated vapor temperature obtained in step 2 from the actual suction line temperature obtained in step 3 The difference between the two temperatures is known as superheat When adjusting superheat recheck the system subcooling before shutting the system Off Charging by Subcooling The outdoor ambient temperature must be between 65 and 105 F and the relative humidity of the air entering the evaporator must be above 40 percent When the tempera tures are outside of these ranges measuring the operating pressures can be meaningless Do not attempt to charge the system with the low ambient dampers and or hot gas bypass operating if applicable Disable the low ambient dampers in the Open position re fer to the Low Ambient Damper secti
210. r shall attach to the Company until said prod ucts have been paid for and then said liability shall be lim ited to the purchase price of the equipment shown to be defective The Company makes certain further warranty protection available on an optional extra cost basis Any further war ranty must be in writing signed by an officer of the Com pany The warranty and liability set forth herein are in lieu of all other warranties and liabilities whether in contract or in negligence express or implied in law or in fact including implied warranties of merchantability and fitness for par ticular use In no event shall the Company be liable for any incidental or consequential damages 114 THE WARRANTY AND LIABILITY SET FORTH HEREIN ARE IN LIEU OF ALL OTHER WARRANTIES AND LIABILITIES WHETHER IN CONTRACT OR IN NEGLI GENCE EXPRESS OR IMPLIED IN LAW OR IN FACT INCLUDING IMPLIED WAR RANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR USE IN NO EVENT SHALL WARRANTOR BE LIABLE FOR ANY INCIDENTAL OR CONSEQUEN TIAL DAMAGES Manager Product Service American Standard Inc Clarksville Tn 37040 1008 PW 215 2688 A 10 year limited warranty is provided on optional Full Modulation Gas Heat Exchanger Optional Extended Warranties are available for compres sors and heat exchangers of Combination Gas Electric Air Conditioning Units A CAUTION Equipment Damage From Ultraviolet UV Lights Trane does not recommend field
211. r the ignition control board 4U18 and subsequent controls after the pre purge timer 4DL5 is de energized by the sequencing time delay relay 4016 The normally open contacts on the pre purge time delay relay 4015 will open in the 1U50 heat fail input preventing the Heat Fail diagnostic The ignition electrode 4E1 will spark continuously for 4 7 seconds in an attempt to establish a flame The flame is proven by the flame rod 4U19 The system will operate in the low heat mode until there is an additional call for heat established by closing the K1 contacts on the Heat Mod ule 60 second sequencing time delay relay 4DL6 will energize the combustion blower relay 4K33 which switches the combustion blower motor to high speed and energizes the 2nd stage solenoid on the gas valve 4L15 56 Unit Start Up Continued If the flame rod 4U19 does not detect a flame at the time of an initial call for heat or detects a loss of flame during operation it will de energize the gas valve and the inter lock relay 4K32 The Fenwal ignition control board 4U18 will lockout automatically If a flame failure occurs prior to the sequencing time delay relay 406 opening its contacts which de energizes the pre purge timer 4015 the sequencing time delay relay 4016 will complete its timing When completed the pre purge time delay relay 4015 is de energized opening its contacts which discon nects power to the ignition control
212. rameters it turns any operating compressor s on that circuit Off locks out all compressor operation for that circuit and ini tiates a manual reset diagnostic Constant Volume CV Units Zone Temperature Cooling Relies on input from a sensor located directly in the space while a system is in the occupied Cooling mode It modu lates the economizer if equipped and or stages the me chanical cooling On and Off as required to maintain the zone temperature to within the cooling setpoint deadband Zone Temperature Heating Relies on input from a sensor located directly in the space while a system is in the occupied Heating mode or an un occupied period to stage the heat on and off or to modu late the heating valve hydronic heat only as required to maintain the zone temperature to within the heating setpoint deadband The supply fan will be requested to operate any time there is a requested for heat On gas heat units the fan will continue to run for 60 seconds after the furnace is turned off Supply Air Tempering On units equipped with staged heat if the supply air temperature falls 10 F below the occupied heating setpoint temperature while the heater is Off the first stage of heat will be turned On The heater is turned Off when the sup ply air temperature reaches 10 F above the occupied heat ing setpoint temperature Variable Air Volume Units Occupied Heating Supply Air Temperature Whe
213. ration below indicates the center line of the electrical access hole in the unit base when it is positioned on the curb 3 8 inch The actual diameter of the hole in the roof should be at least 1 2 inch larger than the diameter of the conduit penetrating the roof This will al low for the clearance variable between the roof curb rail and the unit base rail illustrated in Figure 3 5 The pitch pocket dimensions listed are recommended to en hance the application of roofing pitch after the unit is set into place The pitch pocket may need to be shifted as illus trated to prevent interference with the curb pedestal onduit Diameter 1 2 Clearance E Roof qupd Pitch Pocket Cut a Way h Contest tote uae ton ba A Table for Center Unit Dimension S HF 20 25 amp 30 4 5 9 16 5 9 16 S HF 50 amp 55 9 5 11 16 5 1 2 S HF 40 60 70 amp 75 6 9 5 8 7 3 16 unit functions SAHF SEHF SFHF 55 SLHF and SXHF Curb Accessory is not used The ductwork attached directly to the factory provided flanges around the unit s supply and return air openings Be sure to use flexible duct connections at the unit b For built up curbs supplied by others gaskets must be installed around the curb perimeter flange and the supply and return air opening flanges Installation Continued Note If a built up curb is provided by
214. re 97 10 If the measured carbon dioxide level is below the ommended values for low heat return the burner to 9096 fire rate and repeat steps 6 and 7 to achieve optimum combustion 11 Program the burner for 100 operation and recheck the CO or O value 12 Check the flue gas values at several intermediate out put levels If corrections are necessary Adjust the pressure ratio screw 1 at high fire operation only Adjust the bias screw 2 at low fire operation only 13 Press the STOP key at the Human Interface Module in the unit control panel to stop the system operation Limited Modulating Gas Furnace Limited Modulating gas heaters are available for the 500 850 and 1000 MBH heater sizes These heaters are avail able in the same cabinet sizes as the current heaters The firing rate of the unit can vary from 33 rated MBH up to the nameplate rating of the unit The turn down ratios therefore is limited to 3 1 Heat Exchanger The heat exchanger drum tubes and front and rear head ers utilities the same materials as the standard two stage furnace Unit control The unit is controlled by a supply air temperature sensor lo cated in the supply air stream for VAV units CV units have two sensors one located in the supply air stream and the zone sensor The temperature sensor signal is sent to the Heat module of the Intellipak Unit Control The control sig nal from the Heat Module is an inverse propor
215. rements 63 B 5 u etu t 49 3 16 5 5010 000 49 See Figure 3 16 Remote Panel 5 BAYSENS013C vss Ls qun al Salas 49 53 See Figure 3 16 Figure 3 17 BAYSENS014C tn eres dinis 49 53 See Figure 3 16 Figure 3 17 5 5016 49 53 See Figure 3 16 Figure 3 17 Outside Air Sensor BAYSENS016A 5 5017 00 49 53 See Figure 3 16 Figure 3 17 019 ater nays 49 See Figure 3 16 BAYSENS020 aa l enia deste i eie qa 52 See Figure 3 17 5 5021 52 See Figure 3 17 Belt Tension Measurement and Deflection Ranges 105 See Figure 5 1 C CAUTIONS eie pi a dg deeds 6 21 See Figure 3 3 Charging by 2 93 Coil Cleaning iride 108 Combustion Air Adjustment 95 See High Fire Adjustment Full Modulating Gas Furnace Limited Modulating Gas Furnace Component Static Pressure Drops 76 See Table 4 2 Compressor Assembly Shipping 27 See Figure 3 7A Figure 3 7B Figure 3 7C Compressor Circuit Breakers 10 100 See Table 5 2 Compressor Locations 84
216. rmanent memory If power is off longer than 2 hours only the clock and day may have to be reset The front panel allows selection of Occupied Unoccupied periods with two temperature inputs Cooling Supply Air Temperature and Heating Warm up temperature per occu pied period The occupied cooling setpoint ranges between 40 and 80 Fahrenheit The warm up setpoint ranges be tween 50 and 90 degrees Fahrenheit with a 2 degrees deadband The Unoccupied cooling setpoint ranges be tween 45 and 98 degrees Fahrenheit The heating setpoint ranges between 43 and 96 degrees Fahrenheit The liquid crystal display LCD displays zone temperature temperature setpoints week day time and operational mode symbols The DIP switches on the subbase are used to enable or dis able applicable functions i e Morning warm up econo mizer minimum position override during unoccupied status heat installed remote zone temperature sensor 12 24 hour time display and daytime warm up Refer to Table 3 10 for the Temperature vs Resistance coefficient During an occupied period an auxiliary relay rated for 1 25 amps 30 volts AC with one set of single pole double throw contacts is activated Remote Panel w o NSB 5U59 BAYSENS021A The remote panel w o Night setback has a system switch as well as a S A temperature setpoint indicator a local sensor and four LED s These features allow the operator to control 46 Installation Continued system op
217. rowaway Filter Rack Less Filter Media Bag Filter Rack Less Filter Media Digit 14 Supply Air Fan HP 30 HP 2 15 HP D 40 HP 2 20 HP 50 HP 2 25 HP F 60 HP 2 30 G 80 HP 2 40 HP Digit 15 Supply Air Fan Drive 1000 RPM 1100 RPM 1200 1300 1400 1500 1600 RPM Digit 16 Fresh D 0 100 Economizer Std Digit 17 System Control 1 Constand Volume Control 2 VAV Supply Air Temperature Control without Inlet Guide Vanes 3 VAV Supply Air Temperature Control with Inlet Guide Vanes 4 Space Pressure Control with Exhaust VFD w o Bypass 5 Space Pressure Control with Exhaust and Bypass 6 VAV Supply Air Temperature Control with VFD without Bypass 7 VAV Supply Air Temperature Control with VFD and Bypass 8 Supply and Exhaust Fan with and without Bypass 9 Supply and Exhaust Fan with VFD and Bypass Digit 18 Accessory Panel 0 5008 BAYSENS010 BAYSENS013 D 5014 BAYSENS019 F BAYSENS020 BAYSENS021 Digit 19 Ambient Control 0 Standard Digit 20 Agency Approval 0 None UL Gas Heater See Note 1 1 UL 2 CSA Note Includes UL classified gas heating section only when second digit of Model No is a F Digits 21 36 Miscellaneous 21 Unit Disconnect Switch 22 Hot Gas Bypass 23 C Economi
218. rsist seek medical attention Skin Contact Wash affected areas gently with soap and warm water after handling General Information Continued Commonly Used Acronyms For convenience a number of acronyms and abbreviations are used throughout this manual These acronyms are al phabetically listed and defined 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 IOM Installation operation maintenance manual IPC Interprocessor communications IPCB Interprocessor communications bridge LonTalk Communication Interface for IntelliPak LH Left hand MCM Multiple compressor module MWU Morning warm up 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 RT Rooftop unit RTM Rooftop module S A Supply air SCM Single circuit module SZ Single zone unit airflow TCI Tracer communications module UCM Unit control modules VAN Variable air volume Ventilation control module VOM Ventilation override module w c Water column U
219. s Have a qualified licensed electri cian or other individual who has been properly trained in 38 Installation Continued handling live electrical components perform these tasks Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury Verify that the power supply available is compatible with the unit s nameplate rating for all components The avail able power supply must be within 10 of the rated voltage stamped on the nameplate Use only copper conductors to connect the 3 phase power supply to the unit CAUTION Use Copper Conductors Only Unit terminals are not designed to accept other types of conductors Failure to use copper conductors may re sult in equipment damage Electric Heat Units SEH_ SEHF 20 through 75 Ton electric heat units operating on 200 230 volts require two power supplies as illustrated in Figure 3 14 Unless the unit was ordered with the optional factory mounted non fused disconnect switches two field supplied disconnect switches must be installed The power wires for the electric heat is routed into the electric heat control panel using the thru the base access provided in the heating section Refer to the appropriate illustration in Fig ure 3 2 Unit Base layout and Electrical Entrance diagram for dimensional data 20 through 75 Ton units operating on 460 575 volts and all 90 through 130 Ton units require one po
220. s bag aa ganas ees 9 Lead Lag Operation 56 Limited Modulating Gas Furnace 98 Low Ambient Compressor Lockout 10 Low Ambient Control 9 Low Ambient Dampers 93 Low Pressure 9 Low Fire 95 See Two Stage Gas Furnace M Manifold Pressures and CO2 96 See Gas Furnace Start Up Table 4 7 112 Measuring 93 See Charging by Subcooling Measuring 93 Minimum Position Potentiometer 47 Model Number Description 4 5 Modulating GaS a Na lh ua eds 57 Modulating Gas Furnace 97 Modulating Gas Heat Control 97 98 See Full Modulating Gas Furnace Limited Modulating Gas Furnace Modulating Gas 98 See Figure 4 9 Modulating Gas Train 34 Figure 3 10 Morning Warm Up 10 motor winding temperature decreases to ee 10 motor windings exceeds approximat
221. s can be modified by the customer 1 VOM Mode A Priority 1 Unit Off Supply fan OFF Inlet vanes VFD 0 if equipped Exhaust fan OFF Exhaust dampers Closed O A dampers Closed Heat All stages OFF Modulating Heat output at 0 vdc Occupied Unoccupied output De energized Occupied VO Relay Energized Pre heater State Off if equipped 2 VOM Mode B Priority 2 Pressurize Supply fan ON Inlet Vanes VFD 100 if equipped Exhaust fan OFF Exhaust dampers Closed O A dampers Open Heat All stages OFF Modulating Heat output at 0 vdc Occupied Unoccupied output Energized Unoccupied VO Relay Energized Pre heater State Off if equipped 3 VOM Mode C Priority 3 Exhaust Supply fan OFF Inlet Vanes VFD 0 if equipped Exhaust fan ON Exhaust dampers Open O A dampers Closed Heat All stages OFF Modulating Heat output at 0 vdc Occupied Unoccupied output De energized Occupied VO Relay Energized Pre heater State Off if equipped Installation Continued 4 VOM Mode D Priority 4 Purge Supply Inlet Vanes VFD 100 if equipped Exhaust fan ON Exhaust dampers Open O A dampers Open Heat All stages OFF Modulating Heat output at 0 vdc Occupied Unoccupied output Energized Unoccupied VO Relay Energized Pre heater State Off if equipped 5 VOM Mode E Priority 5 Purge with duct pressure
222. s without the low ambient option is 50 F For units with the low ambient option the setpoint is 0 F The setpoints are adjustable at the Human Interface inside the unit control panel Space Pressure Transducer 3U62 Is an analog input device used on CV amp VAV applications with the Statitrac option It modulates the exhaust dampers to keep the space pressure within the building to a cus tomer designated controlband It is mounted in the filter section just above the exhaust damper actuator and is con nected to the ECEM 1U52 Field supplied pneumatic tub ing must be connected between the space being controlled and the transducer assembly Transducer Voltage Output vs Pressure Input 4 0 3 5 3 0 2 5 2 0 Volts 1 5 1 0 0 5 0 0 0 5 0 0 0 5 1 0 1 5 20 2 5 3 0 35 40 45 5 0 Pressure inches w c Morning Warm Up Zone Heat When a system changes from an unoccupied to an occu pied mode or switches from STOPPED to AUTO or power is applied to a unit with the MWU option the heater in the unit or external heat will be brought on if the space tem perature is below the MWU setpoint The heat will remain on until the temperature reaches the MWU setpoint If the unit is VAV then the VAV box unocc relay will continue to stay in the unoccupied position and the VFD IGV output will stay at 100 during the MWU mode When the MWU setpoint is reached and the heat mode is terminated then the VAV
223. sed on CV amp VAV units with Hy dronic Heat It is mounted in the heat section and con nected to the Heat Module 1U50 If the temperature of the air entering the heating coil falls to 40 F the normally open contacts on the freezestat closes signalling the Heat Mod ule 1U50 and the Rooftop Module RTM to a drive the Hydronic Heat Actuator 4U15 to the full open position b turn the supply fan Off c closes the outside air damper d turns On the SERVICE light at the Remote Panel e initiates a Freezestat diagnostic to the Human Interface High Duct Temp Thermostats Optional 3516 3517 Are binary input devices used on CV amp VAV applications with a Trane Communication Interface Module TCI They provide high limit shutdown of the unit and requires a manual reset They 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 can be reset by pressing the button located on the sensor once the air temperature has decreased approximately 25 F below the cutout point Compressor Circuit Breakers 1CB8 1CB9 1CB10 1CB11 amp 1CB14 1CB15 1CB16 1CB17 The Scroll Compressors are protected by circuit breakers which interrupt the power supply to the compressors if the current exceeds the breakers must trip value During a re quest for compressor operation if the Compressor Module SCM detects a problem outside of it s normal pa
224. stall all panels in preparation for starting the unit Electrical Phasing Unlike traditional reciprocating compressors scroll com pressors are phase sensitive Proper phasing of the electri cal supply to the unit is critical for proper operation and reli ability The compressor motor is internally connected for clockwise rotation with the incoming power supply phased as A B C Proper electrical supply phasing can be quickly determined and corrected before starting the unit by using an instru ment such as an Associated Research Model 45 Phase Se quence Indicator and following the steps below Turn the field supplied disconnect switch that provides power to terminal block 1TB1 or to the unit mounted dis connect switch 1514 to the Off position Connect the phase sequence indicator leads to the ter minal block or unit mounted disconnect switch as fol lows Phase Sequence Unit Power Leads Terminal Black phase A L1 Red phase B L2 Yellow Phase C L3 Close the disconnect switch or circuit protector switch that provides the supply power to the unit s terminal block 1TB1 or the unit mounted disconnect switch 1514 N wanNING Hazardous Voltage Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvert ently energized Failure to disconnect power before ser vicing could result in death or serious i
225. sually inspect the internal components for shipping damage as soon as possible after delivery and before it is stored Do not walk on the sheet metal base pans wARNING No Step Surface FOR ACCESS TO COMPONENTS THE BASE SHEET METAL SURFACE MUST BE REINFORCED Bridging between the unit s main supports may consist of multiple 2 by 12 boards or sheet metal grating Failure to comply could result in death or severe personal injury from falling concealed damage is discovered notify the carrier s terminal of damage immediately by phone and by mail Concealed damage must be reported within 15 days Request an immediate joint inspection of the damage by the carrier and the consignee Do not remove damaged material from the receiving location Take photos of the damage if possible The owner must provide reasonable evidence that the damage did not occur after delivery Remove the protective plastic coverings that shipped over the compressors 14 Installation Storage Take precautions to prevent condensate from forming inside the unit s electrical compartments and motors if a the unit is stored before it is installed or b the unit is set on the roof curb and temporary heat is provided in the building Isolate all side panel service entrances and base pan openings e g conduit holes S A and R A openings and flue openings from the ambient air until the unit is ready for startup Note Do not use the
226. sure to within the static pressure setpoint deadband Refer to the Transducer Voltage Output vs Pressure Input values listed in the Space Pressure Transducer 3U62 section Unit Component Layout and Shipwith Locations Flue Vent Accessories 8 20 75 Note Remove amp discard 2 mounting brackets j T E 8 SUPPLY FAN SECTION Z ZC zs Variable a Frequency lt Drive option S EN Condenser Fans Compressor Section 2 RETURN amp EXHAUST SECTION 13 o eese lt 1 Hot Water or Steam Valve Outside Air Static Kit Actuator amp Linkage Snap Bushings Conduit Plugs Unit Literature Steam or Hot Water Valve Actuator amp Linkage Typical S_HG 90 130 Ton T Flue Vent Accessories po d Ff el T 2 B 5 Variable gt Frequency lt jm Drive 5 FILTER 117 SECTION g 81 RETURN amp EXHAUST SECTION x mln ERN Ls lt 1 SUPPLY SECTION HTG ACCESS a Q Q Ral 4 HEAT SECTION 2 Compressor Section ELEC CONTROL PANEL
227. t _ L RE 0 29 696 317114 gos 61 214 Z d sgr H 6 ep m er zir ED V amu UO a a a on 9918 i9191 V 41 217 S ses 40 ld 959 S ses 29 2 zQ J HNR zrp MEET 69 dos m 2 eu sya Kos NI OVA Z sos wo V S LLgONSvIG 19 NN 2 5 de ir San w zrp V 69 TpOS ON 3ALLOV lt 1 914434 eoepjieju u uo enjeA penndur enpe eu OPA Se eq S uey JeuBiu sindu OPA S 0 S IM S 0 uey ss sindu 0404000 2 0190 140495 015 OMI 5 0 91 0 0 PA GY 0190 eunsseJg 9181 eoeds x x 5081 01420 ODA S O S O uO AVA BuneeH v S x 4 06 91 4 07 IPA 6 01640 juiodjes v S x 4 06 01 4 0 Gv 019 0 julodjas Bune H euoz x x 4 06 01 4 0 Gv 0160 luiod S euoz x 4 06 91 4 0 IPA Gv 01640 yulodjes euoz x x 006
228. t Volume or Variable Air Volume System edibus Table of Contents Section Four Unit Stark UD ocio tere e etis Ride 55 Cooling Sequence of Operation 55 Gas Heating Sequence of 56 Fenwal Ignition System sese 56 Honeywell Ignition 56 Modulating Gas Sequence of Operation 57 Elame Eall tre a tete ets 57 Electric Heat Sequence of Operation 58 Wet Heat Sequence of Operation 58 Electrical Phasing eee 59 Voltage Supply and Voltage Imbalance 60 Service Test Guide for Component Operation 61 Verifying Proper Fan Rotation 63 If all of the fans are rotating backwards 63 System Airflow Measurements 63 Constant Volume Systems 63 Variable Air Volume 65 Exhaust Airflow Measurement 66 Sensor Airflow 66 Economizer Damper Adjustment 80 Compressor 82
229. t the top of the coil and work downward then clean the entering air side of the coil starting at the top of the coil and working downward 6 Check both sides of the coil if it still appears dirty repeat Step 5 7 Reinstall all of the components and panels removed in Step 2 then restore power to the unit 109 Service Maintenance Continued Final Process Complete Unit Model Number For future reference you may find it helpful to record the unit data in the blanks provided Unit Serial Number Unit DL Number Design special units only Wiring Diagram Numbers from unit control panel schematic s connections Unit Address TCI Network ID Table 5 8 Sample Operator s Maintenance Log See Note Refrigerant Circuit 1 Refrigerant Circuit 2 Current Ambient Compr Suct Disch Liquid Super Sub Compr Suct Disch Liquid Super Sub Temp Oil Press Press Press heat cool Oil Press Press Press heat cool Date F Level Psig Psig Psig F F Level Psig Psig Psig F F ok low low low low low low low low low low low low Note Check and record the data requested above each month during the cooling season with the unit running 110 Peres 45 See Table 3 8 Adjusting the Fresh Air Damper 80 Airflow Measu
230. te the delay before the test is to start This ser vice test will begin after the TEST START key is pressed and the delay designated in this step has elapsed Press the ENTER key to confirm this choice 3 Press the TEST START key to start the test Remember that the delay designated in step 2 must elapse before the system will begin to operate Unit Start Up Continued Z warnine Rotating Components During installation testing servicing and troubleshoot ing of this product it may be necessary to measure the speed of rotating components Have a qualified or li censed service individual who has been properly trained in handling exposed rotating components per form these tasks Failure to follow all safety precau tions when exposed to rotating components could re sult in death or serious injury 4 Once the system has started check the appearance of the flame through the sight glass provided on the front of the heat exchanger In appearance a normal flame has a clearly defined shape and is primarily 75 blue in color with an orange tip 5 Check the inlet gas pressure at the modulating gas valve The inlet pressure should be 6 to 8 w c 6 Use a carbon dioxide analyzer and measure the percent age of carbon dioxide in the flue gas Refer to the illus tration in Figure 4 7 Take several samples to assure that an accurate reading is obtained If the measured carbon dioxide level is between 8 0 and 9 5 no adjust
231. tector switch that provides the supply power to the unit s terminal block 1TB1 or the unit mounted disconnect switch 1514 wanNING Hazardous Voltage Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvert ently energized Failure to disconnect power before ser vicing could result in death or serious injury HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK 1TB1 OR UNIT DISCONNECT SWITCH 1514 3 Turn the 115 volt control circuit switch 151 and the 24 volt control circuit switch 1570 to the On position 4 Open the Human Interface access door located in the unit control panel and press the SERVICE MODE key to display the first service screen Refer to the latest edition of the appropriate SAHF PTG manual for CV or VAV ap plications for the SERVICE TEST screens and program ming instructions 94 Unit Start Up Continued 5 Use Table 4 1 to program the following system compo nents for operation by scrolling through the Human Inter face displays Electric Heat Supply Fan On Inlet Guide Vanes 10096 Open if applicable Variable Frequency Drive 10096 Output if applicable RTM Occ Unocc Output Unoccupied Heat Stages 1 amp 2 On Steam or Hot Water Heat Supply Fan On Inlet Guide Vanes 10096 Open if applicable Variable Frequency Drive 10096 Output if applicable RTM Occ Unocc Output Unoccupied Hydron
232. ternal use heat fail Information Only Note The modulating gas heaters are factory adjusted for the proper air gas ratio at minimum and nameplate rated firing MBH for most areas in the country Electric Heat Sequence of Operation The control system for the rooftop units are wired to ensure that the heating and cooling do not occur simultaneously Refer to the electric heat wiring diagrams that shipped with the unit while reviewing the following sequence of opera tion As you review the sequence of operations remember these points Whenever there is a call for heat 1U50 K1 energizes This energizes HEAT 1 contactors 4K34 and 4K35 which in turn energize two of the six 4HR3 heating elements Note Electric heater 4HR3 will only energize if both of the heat section s high limit safety controls 4527 4533 closed 1 High limit Switch 4527 will trip if exposed to a tempera ture of 133 5 F and reset automatically once the tem perature falls to 110 5 F It is mounted on the control box side of the electric heat element assembly 2 Linear high limit 4533 is encased a capillary that ex tends across the unit s supply air opening and is an chored near the bottom of the heat section control box It is designed to trip if the temperature across any 6 span of the capillary exceeds 185 10 F Refer to Table 5 1 The HEAT 2 4K36 4K37 and HEAT 3 4K38 4K39 con tactors are not energized un
233. tersect read straight down to the CFM line Use this data to assist in calculating a new fan drive if the CFM is not at design specifications An alternate method with less accuracy is to measure the static pressure drop across the evaporator coil This can be accomplished by a drilling a small hole through the unit casing on each side of the coil Note Coil damage can occur if care is not taken when drilling holes in this area b Measure the difference between the pressures at both locations c Plot this value onto the appropriate pressure drop curve in Figure 4 3 Use the data in Table 4 2 Component Static Pressure Drops to assist in calculating a new fan drive if the CFM is not at design specifications d Plug the holes after the proper CFM has been established 9 Press the STOP key at the Human Interface Module in the unit control panel to stop the fan operation Variable Air Volume Systems 1 Ensure that the System selection switch at the remote panel is in the Off position 2 Close the disconnect switch or circuit protector switch that provides the supply power to the unit s terminal block 1TB1 or the unit mounted disconnect switch 1514 N wanNING Hazardous Voltage Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvert ently energized Failure to disconnect power before ser vicing could
234. the condenser fans minimum clearance of 2 4 1 2 is required to open the hinged control panel doors on 90 thru 130 Ton units 3 Increase the clearance between staggered units by 150 of the minimum clearance for a single unit installation i e 1270 clearance for 20 through 130 A minimum clearance of 16 0 is required if the units are not staggered 4 4 minimum clearance for 20 through 75 Ton units Condenser 8 minimum clearance for 90 through 130 Ton units Bection Staggering the units Note 1 minimizes span deflection which deters sound transmission and b maximizes proper diffusion of the exhaust air before it reaches the adjacent unit s fresh air intake 15 1309 4 ASIA pug 0914 T 8 1 9 D 1 gyrun uo GZ pue 04 09 OF uo epou erp 8 9 9 8 1 7 Ajuo GG pue og 08 Gz OZ uo loq BID 8 1 7 910N sr 5995 8 0 0 8 1 9943 Surg g S S 10 8 1 7 d ATALI ye 3urjeuruue Jum oljuoo oq 2 OV p llg sur lou g I T1 918117 3e Surneurunrej orjuoo FP
235. the system will begin to operate 4 Once the system has started check the appearance of the flame through the sight glass provided on the front of Unit Start Up Continued the heat exchanger In appearance a normal flame has a clearly defined shape and is primarily 75 blue in color with an orange tip 5 Check the manifold gas pressure by using the manifold pressure port on the gas valve Refer to Table 4 7 for the required manifold pressure for high fire operation If it needs adjusting remove the cap covering the high fire adjustment screw on the gas valve Refer to Figure 4 8 for the adjustment screw location Turn the screw clock wise to increase the gas pressure or counterclockwise to decrease the gas pressure 6 Use a carbon dioxide analyzer and measure the percent age of carbon dioxide in the flue gas Refer to the illus tration in Figure 4 7 Take several samples to assure that an accurate reading is obtained Refer to Table 4 7 for the proper carbon dioxide levels A carbon dioxide level exceeding the listed range indicates incomplete combus tion due to inadequate air or excessive gas Combustion Air Adjustment 7 Use an oxygen analyzer and measure the percentage of oxygen in the flue gas Take several samples to assure an accurate reading Compare the measured oxygen level to the combustion curve in Table 4 8 The oxygen content of the flue gas should be 4 to 5 If the oxygen level is outside this range
236. tion Continued 6 Install a pressure regulator at the unit that is adequate to maintain 7 w c for natural gas while the furnace is oper ating at full capacity Note Gas pressure in excess of 14 w c or 0 5 psig will damage the gas train Failure to use a pressure regulating device will result in in correct gas pressure This can cause erratic operation due to gas pressure fluctuations as well as damage the gas valve Over sizing the regulator will cause irregular pulsating flame patterns burner rumble potential flame outages and pos sible gas valve damage If a single pressure regulator serves more than one rooftop unit it must be sized to ensure that the inlet gas pressure does not fall below 7 w c with all the furnaces operating at full capacity The gas pressure must not exceed 14 w c when the furnaces are off 7 Provide adequate support for all field installed gas piping to avoid stressing the gas train and controls 8 Leak test the gas supply line using a soap and water so lution or equivalent before connecting it to the gas train 9 Check the supply pressure before connecting it to the unit to prevent possible gas valve damage and the un safe operating conditions that will result Note Do not rely on the gas train shutoff valves to isolate the unit while conducting gas pressure leak test These valves are not designed to withstand pressures in excess of 14 w c or 0 5 psig Connecting the Gas Suppl
237. tional 5 10V DC The higher the voltage signal the lower the call for heat The 5 10V DC signal controls the angular position of the combustion air damper through a direct coupled damper ac tuator motor The position of the air damper in turn controls the combustion air pressure that is sensed by the modulat ing gas valve The greater the combustion air pressure the greater the call for gas and the higher the firing rate of the heater As the temperature setpoint is reached the Modu lating Heat control will cause the combustion air actuator to change the damper position to a lower firing rate that matches the heat load of the space 1 To verify and check system optimum combustion use Table 4 1 to program the limited modulating heat system components for 9096 operation by scrolling through the Human Interface displays 98 Unit Start Up Continued 2 Follow the checkout procedures discussed in the previ ous steps Note The minimum firing rate for a limited modulating gas furnace in step 8 is 33 Travel of the combustion air damper is limited by a welded stop 3 Press the STOP key at the Human Interface Module in the unit control panel to stop the system operation Figure 4 9 Modulating Gas Regulator Modulating Gas Regulator Legend 1 Adjustment and indication of the air to gas ratio 2 Adjustment and indication of the bias 3 Connection for the Ambient compensation line 4 Connectio
238. to The post purge time delay relay 4DL4 delays the starting of the combus tion blower motor by approximately 60 seconds Once the timing has elasped the combustion blower motor will start closing the combustion air switch 4S25 Energize the control relay 4K31 and the sequence time delay relay 4DL6 24 volts is applied from the new service switch 4524 through the normally open control relay 4K31 contacts to energize the 1st stage solenoid on the gas valve 4L7 On an additional call for heat the K3 contacts on the Heat Module will close to energize the combustion blower relay 4K33 which switches the combustion blower motor to high speed and closes its normally open contacts allowing 24 volts to energize the 2nd stage on the gas valve 4L7 Once the heating demand has been satisfied the Honeywell ignition control board 4U18 and the post purge time delay relay 4DL4 is de energized The combustion blower motor will continue to operate for approximately 15 seconds to purge the heat exchanger on the Off cycle Modulating Gas Sequence of Operation Full and Limited Modulating Gas Furnace The control system for the rooftop units are wired to ensure that the heating and cooling do not occur simultaneously Refer to the modulating heat wiring diagram that shipped with the unit while reviewing the following sequence of op Unit Start Up Continued eration As you review the sequence of operations keep the following in mi
239. ue extension onto the flue assembly as shown in Figure 3 11 3 Slide the pipe clamp onto the heater flue tube located in side the heater compartment 34 Installation Continued 4 Insert the tube on the flue assembly into the hole located in the vertical support for the heat section 5 Butt both flue tube sections together and center the pipe clamp over joint 6 Using the pre punch holes in the flue assembly exten sion and the vertical support install the appropriate number of mounting brackets Refer to Figure 3 11 for details Figure 3 11 Flue Assembly Mounting Brackets Flue 4 20 25 Ton N A Extension 30 Ton 2 20 25 Ton N A 30 Ton 13 Long 40 60 70 75 Ton 25 Long 50 55 Ton 37 Long 90 130 Ton 37 Long 40 130 Ton 4 Pipe Clamp Vent Cap Assembly Heat Section Vertical Support Hot Water Heat Units SLH Hot water heating coils are factory installed inside the heater section of the unit Once the unit is set into place the hot water piping and the factory provided three way modulating valve must be installed The valve can be in stalled inside the heat section or near the unit If the valve is installed in a remote location use field supplied wiring to extend the control wires from the heater section to the valve Two access holes are provided in the unit base as il lustrated in Figure 3 2 Following the guidelines listed belo
240. uge ports for each circuit Refer to Figure 4 6 for the various compressor locations 2 Open the Human Interface access door located in the unit control panel and press the SERVICE MODE key to display the first service screen Refer to the latest edition of the SAHF PTG 1B for CV applications or SAHF PTG 2B for VAV applications for the SERVICE TEST screens and programming instructions 3 Use Table 4 1 to program the following system compo nents for the number 1 refrigeration circuit by scrolling through the displays Supply Fan On Inlet Guide Vanes VFD 100 if applicable OCC UNOCC Relay Unoccupied for VAV units All Compressors for each circuit On Condenser Fans for each circuit On 4 Once the configuration for the components is complete press the NEXT key until the LCD displays the Start test _ Sec screen Press the key to designate the delay before the test is to start This service test will begin after the TEST START key is pressed and the delay desig nated in this step has elapsed Press the ENTER key to confirm this choice wanNING Rotating Components Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power can not be inadvert ently energized Failure to disconnect power before ser vicing could result in death or serious injury 5 Press the TEST START key to start the test Remember that the delay
241. ules sensors remote panels and customer supplied bi nary inputs It initiates supply fan exhaust fan exhaust damper inlet guide vane positioning or variable frequency drive output and economizer operation based on that in formation RTM Resistance Input vs Setpoint Temperatures RTM cooling or RTM cooling heating setpoint input setpoint input used as the used as the source for source for a SUPPLY AIR ZONE temp temp setpoint setpoint F cooling F Resistance Ohms Max Tolerance 5 RTM Resistance Value vs System Operating Mode Resistance applied to RTM MODE input Constant Volume Units Terminals Ohms Max Tolerance Fan System 5 2320 Auto Off 4870 Auto Cool 7680 Auto Auto 10770 On Off 13320 On Cool 16130 On Auto 19480 Auto Heat 27930 On Heat Compressor Module SCM amp MCM 1U49 standard on all units The Compressor module Single Circuit amp Multiple Circuit upon receiving a request for mechanical cooling energizes the appropriate compressors and condenser fans It moni tors the compressor operation through feedback information it receives from various protection devices Human Interface Module HI 1U65 standard on all units The Human Interface module enables the operator to adjust the operating parameters for the unit using it s 16 key key pad The 2 line 40 character LCD screen provides status information for the various unit functions as well as menus for the op
242. ultaneously within their respective circuits on the 70 thru 105 Ton units Compressors 1A amp 1B 1C amp 1D 2A amp 28 2C 2D operate simultaneously within their respective circuits on 115 and 130 Ton units Caution Do Not operate the compressors for extended periods of time without the condenser fans High Head Pressure will develope Condenser fan outputs can operate individually or together and in any order while in the SERVICE TEST mode Once the unit has started refer to the Status Menu in the Human Interface for the OA CFM 62 RTM OCC UNCCC output the Service Test Mode must be in the unoccupied mode to open the system boxes and the Inlet Guide Vanes or to drive the VFD to 100 Verifying Proper Fan Rotation 1 Ensure that the System selection switch at the remote panel is in the Off position and the Fan selection switch for constant volume units is in the Auto position VAV units do not utilize a Fan selection input 2 Close the disconnect switch or circuit protector switch that provides the supply power to the unit s terminal block 1TB1 or the unit mounted disconnect switch 1514 3 Turn the 115 volt control circuit switch 151 and the 24 volt control circuit switch 1570 to the On position 4 Open the Human Interface access door located in the unit control panel and press the SERVICE MODE key to display the first service screen Refer to the latest edition of the appro
243. um outside air CFM setpoint to modify the volume CFM of fresh air enter ing the unit as the measured airflow deviates from setpoint When the optional temperature sensor is installed 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 Actu ate Temperature Setpoint the VCM will activate the preheat binary output used to control a field installed heater The output will be deactivated when the temperature rises 5 above the Preheat Actuate Temperature Setpoint When the optional CO sensor is installed and the CO Re set is enabled as the concentration increases above the CO Reset Start Value the VCM will modify the mini mum outside air CFM setpoint to increase the amount of fresh air entering the unit The setpoint will be adjusted up ward until the CO Maximum Reset Value is reached The maximum effective reset setpoint value for fresh air enter ing the unit is limited to the systems operating CFM As the CO concentration decreases the effective reset setpoint value is adjusted downward toward the minimum outside air CFM setpoint Carbon Dioxide Reset Maximum Airflow Increasing Reset Amount Increasing 0 Concentration Setpoint ___ Carbon Dioxide Carbon Dioxide Reset Start Maximum Reset Frostat Control The compressor module utilizes an evapor
244. upply fan starts the fan proving switch 3568 closes signaling the RTM that airflow has been established Inlet Guide Vanes will begin to drive open if equipped or the VFD will begin to ramp the fan if equipped When cooling request is sent to the RTM from a zone temperature sensor the RTM evaluates the operating con dition of the system using the supply air temperature input and the outdoor temperature input before sending the re quest to the SCM MCM Once the request is sent to the SCM MCM the compressor module checks the compressor protection circuit before closing Stage 1 K10 on SCM or K11 After the first functional stage has started the compressor module monitors the saturated refrigerant temperature and closes the condenser fan output contact 1A when the saturated refrigerant temperature rises above the lower limit setpoint Units with an Economizer Upon entering an occupied mode of operation the RTM receives input from the remote panel to start the supply fan For constant volume applications the RTM supply fan con tacts K2 close which energizes the supply fan contactor 1K16 Units equipped with Inlet Guide Vanes IGV the fan is delayed until the inlet guide vanes are driven to the full closed position When the supply fan starts the fan proving switch 3S68 closes signaling the RTM that airflow has been established The RTM opens the economizer dampers to the specified minimum position
245. us injury 60 Unit Start Up Continued Voltage Imbalance Excessive three phase voltage imbalance between phases will cause motors to overheat and eventually fail The maxi mum allowable voltage imbalance is 2 Measure and record the voltage between phases 1 2 and 3 and calcu late the amount of imbalance as follows 100 X AV VD where AV Voltage Imbalance Volt 1 Volt 2 Volt 3 3 V1 V2 V3 Line Voltage Readings VD Line Voltage reading that deviates the farthest from the average voltage AV Average Voltage Example If the voltage readings of the supply power measured 221 230 and 227 the average volts would be 221 230 227 226 Avg 3 VD reading farthest from average 221 The percentage of Imbalance equals 100 X 226 221_ 2 2 226 The 2 2 imbalance in this example exceeds the maximum allowable imbalance of 2 0 This much imbalance be tween phases can equal as much as 20 current imbal ance with a resulting increase in motor winding tempera tures that will decrease motor life If the voltage imbalance is over 2 notify the proper agencies to correct the voltage problem before operating this equipment Table 4 1 Service Test Guide for Component Operation COMPONENT COMPONENT CONFIGURATION Occ BEING TESTED Condenser Heat Stages Econo Exhaust FD Unocc Fans 2 3 4 IGV Output Relay COMPRESSOR 20 thru 30 Ton A K10 Off K1
246. ut at 0 Occupied Unoccupied output Energized VO Relay Energized with VOM module installed OA Preheater State Off with VCM module installed DEPRESSURIZE Supply Fan Off Inlet Vanes Closed if equipped Exhaust Fan On if equipped Exhaust Dampers Open if equipped OA Dampers Closed Heat All heat stages Off staged gas and elec Hydronic heat amp Mod Gas Heat output at 096 Occupied Unoccupied output De energized VO Relay Energized with VOM module installed OA Preheater State Off with VCM module installed 47 Supply Fan On Inlet Vanes Open if equipped Exhaust Fan On if equipped Exhaust Dampers Open if equipped OA Dampers Open Heat All heat stages Off staged gas and elec Hydronic heat amp Mod Gas Heat output at 0 Occupied Unoccupied output Energized VO Relay Energized with VOM module installed OA Preheater State Off with VCM module installed SHUTDOWN Supply Fan Off Inlet Vanes Closed if equipped Exhaust Fan Off if equipped Exhaust Dampers Closed if equipped OA Dampers Closed Heat All heat stages Off staged gas and elec Hydronic heat amp Mod Gas Heat output at 0 Occupied Unoccupied output De energized VO Relay Energized with VOM module installed OA Preheater State Off with VCM module installed FIRE Supply Fan Off Inlet Vanes Closed if equipped Exhaust Fan Off if equipped Ex
247. ving sev eral system modes depends upon the type of sensor and or remote panel selected to interface with the RTM An overall layout of the various control options available for a Constant Volume application with the required number of conductors for each device is illustrated in Figure 3 16 Figure 3 17 il lustrates the various control options with the required num ber of conductors for a Variable Air Volume application Note field wiring must conform to guidelines as well as state and local codes The various field installed control panels sensors switches and contacts discussed in this section require both AC and DC consideration These diagrams are representative of standard applications and are provided for general refer ence only Always refer to the wiring diagram that shipped with the unit for specific electrical schematic and connection information A warnine Hazardous Voltage Disconnect all electric power including remote discon nects before servicing Follow proper lockout tagout procedures to ensure the power not be inadvert ently energized Failure to disconnect power before ser vicing could result in death or serious injury Controls using 24 VAC Before installing any connecting wiring refer to Figure 3 2 for the electrical access locations provided on the unit and Table 3 8 for AC conductor sizing guidelines and a Use copper conductors unless otherwise specified b Ensure that
248. w will enchance both the installation and operation of the wet heat system Figure 3 12 illustrates the recommended piping configura tion for the hot water coil Table 3 5 list the coil connection sizes Note The valve actuators are not waterproof Failure to protect the valve from moisture may result in the loss of heating control 1 Support all field installed piping independently from the heating coil 2 Use swing joints or flexible connectors adjacent to the heating coil These devices will absorb the strains of ex pansion and contraction 3 All return lines and fittings must be equal to the diameter of the outlet connection on the hot water coil 4 Install Gate type valve the supply branch line as close as possible to the hot water main and upstream of any other device or takeoff 5 Install a Gate type valve in the return branch line as close as possible to the return main and down stream of any other device 6 Install a strainer in the hot water supply branch as shown in Figure 3 12 7 Install the 3 way valve in an upright position piped for valve seating against the flow Ensure that the valve s lo cation lends itself to serviceability 8 The Type W hot water coil used in SLHF units is self venting only when the tube water velocity exceeds 1 5 feet per second fps If the tube velocity is less than 1 5 feet per second either a install an automatic air vent at the top of the return
249. wer entry as illus trated in Figure 3 14 Use the information provided in Table 3 7 and the Power Wire Sizing amp Protection Device Equations to determine the appropriate wire size and Maximum Over current Pro tection for the heaters unit Note Each power supply must be protected from Short circuit and ground fault conditions To comply with NEC protection devices must be sized according to the Maximum Over current Protection MOP or Recommended Dual Element RDE fuse size data on the unit nameplate Provide grounding for the supply power circuit in the elec tric heat control box Main Unit Power Wiring Table 3 6 list the field connection wire ranges for both the main power terminal block 1TB1 and the optional main power disconnect switch 1514 Table 3 7 list the compo nent electrical data for 20 through 130 Ton units The elec trical service must be protected from over current and short circuit conditions in accordance with NEC requirements Protection devices must be sized according to the electri cal data on the nameplate Refer to the Power Wire Sizing amp Protection Device Equations for determining a the appropriate electrical service wire size based on Minimum Circuit Ampacity MCA b the Maximum Over current Protection MOP device c the Recommended Dual Element fuse size RDE Installation Continued 2 If the unit is not equipped with an optional factory 3 Location for the
250. y Water Hot Water Piping 90 through 130 Ton Air Vent n 3 Way Modulating Valve Field Installed OUTLET A AB Return L Water Hot Water Coil ARI Listed B INLET Bypass Air Vent n OUTLET Pressure Drop Balancing Globe Valve Hot Water Coil ARI Listed 1 Strainer Supply Water INLET 36 Figure 3 13 Steam Coil Piping 20 through 30 Ton Units NS Type Steam Coil ARI Listed Steam Coil Piping 40 through 130 Ton Units Use same size pipe as Trap Con
251. y Line to the Furnace Gas Train Follow the steps below to complete the installation between the supply gas line and the furnace Refer to Figure 3 10 for the appropriate gas train configuration 1 Connect the supply gas piping using a ground joint type union to the furnace gas train and check for leaks 2 Adjust the inlet supply pressure to the recommended 7 to 14 w c parameter for natural gas 3 Ensure that the piping is adequately supported to avoid gas train stress Table 3 4 Sizing Natural Gas Pipe Mains amp Branches Sizing Natural Gas Pipe Mains amp Branches Gas Input Cubic Feet Hour Gas Supply 1 1 4 1 1 2 2 2 1 2 3 4 Pipe Run ft Pipe Pipe Pipe Pipe Pipe Pipe 10 1050 1600 3050 4800 8500 17500 20 730 1100 2100 3300 5900 12000 30 590 890 1650 2700 4700 9700 40 500 760 1450 2300 4100 8300 50 440 670 1270 2000 3600 7400 60 400 610 1150 1850 3250 6800 70 370 560 1050 1700 3000 6200 80 350 530 990 1600 2800 5800 90 320 490 930 1500 2600 5400 100 305 460 870 1400 2500 5100 125 275 410 780 1250 2200 4500 150 250 380 710 1130 2000 4100 175 225 350 650 1050 1850 3800 200 210 320 610 980 1700 3500 Table is based specific gravity of 0 60 Use Table 3 1 for specific gravity of the local gas supply Specific Gravity Multipliers Installation Continued Notes 1 If more than one unitis served by the same main gas supply consider the total gas input cubic feet hr and the total l
252. zer Control with Comparative Enthalpy Z Economizer Control with Reference Enthalpy W Economizer Control w Dry Bulb 0 None W O Economizer E Low Leak Fresh Air Dampers F High Duct Temperature Thermostat G High Capacity Evaporator Coil 90 105 Only K Generic BAS Module L High Efficiency Motors Supply and Exhaust 29 M Remote Human Interface 30 N Ventilation Override Module 31 R Extended Grease Lines 32 T Access Doors 33 V Inter processor Communication Bridge 0 No communication module Y Trane Communication Interface Module 7 LonTalk Communication Interface Module 0 6 Factory Powered 15A GFI Convenience Outlet 23 23 23 24 25 26 27 28 34 34 34 35 36 Echelon LON LONWORKS LonBuilder NodeBuilder LonManager LonTalk LonUsers Neuron 3120 3150 the Echelon logo and the LonUsers logo are trademarks of Echelon Corporation registered in the United States and other countries LonLink LonResponse LonSupport LonMaker and LonPoint are trademarks of Echelon Corporation Unit Nameplate One Mylar unit nameplate is located on the outside upper left corner of the control panel door It includes the unit model number serial number electrical characteristics weight refrigerant charge as well as other pertinent unit data A small metal nameplate with the Model Number Se rial Number and Unit Weight is located just above the Mylar nameplate and a t

Trane RT-SVX10C-EN User's Manual

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