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Liebert® Mini-Mate2™ - Emerson Network Power

1. 36 Piping and electrical connections outdoor condensing 37 Indoor water glycol condensing unit dimensions 39 Electrical field connections indoor water glycol condensing unit 40 System piping with indoor water glycol cooled condensing 41 Optional free cooling coil 8 way valve on water glycol 42 Optional free cooling coil 3 way valve on air cooled 42 Wea esd ener eee gerd ich rea eect otha ND e Ee arlene eA ade ee 44 Control Men ve others aad a BSS ast JN E E E DI cata ae aw Satan ad naa d 54 Control board inside evaporator kk kk kK kK eee KK KK KK KK KK KK KK KK 55 Wall bok board ou atte agre seg E Ross e e Aya Bk A oe Gee ce a e rr ARR I d 55 Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 Table 15 Table 16 Table 17 Table 18 Table 19 Table 20 Table 21 Table 22 Table 23 Table 24 TABLES System configurations 60HZ rs 6 System configurations 50Hz eee kk kk kk kk s 6 Application limits evaporator and chilled water units 14 Application limits i
2. 16 System configurations chilled water systems kk kK KK KK KK KK KK KK KK KK KK KK KK KK 16 System configurations close coupled 17 Threaded rod and hardware kit installation 0 0 kk kk KK KK KK KK KK KK KK KK KK KK KK KK KI KK 18 Close coupled installation k kk kk kK kk kk ak kl al a k lk lk le as 19 Evaporator unit electrical connections kK KK KK KK KK KK KK KK KK KK KK KK KK KK kk kk 22 Drain xustallatiou Z ya ues big say ben ye Pos n ette qr eio N Aya ats Sl yan pe 23 Condensate pump 1 es 24 General arrangement diagram chilled water 25 Refrigerant piping diagram KK KK KK KK KK KK kk kk kK kk kk kk kk kK kk kk kk kk 27 Evaporator or chilled water unit 8 29 Indoor air cooled centrifugal condenser electrical connections 31 Piping connections indoor air cooled centrifugal fan condensing unit 32 Indoor air cooled centrifugal condensing unit dimensions and pipe connections 33 Electrical field connections outdoor condensing 35 Footprint dimensions outdoor condensing
3. Add 40 Ib 20kg to units with free cooling or hot water reheat coils 53 Equipment Inspection Upon Receipt When the unit arrives do not uncrate equipment until it is close to its final location All required assemblies are banded and shipped in corrugated containers If you discover any damage when you uncrate the unit report it to the shipper immediately If you later find any concealed damage report it to the shipper and to your Liebert supplier 17 Liebert Mini Mate2 Site Preparation and Installation 5 4 Installing the Ceiling Units A WARNING Risk of ceiling collapse and heavy unit falling Can cause building damage serious injury or death Verify that the supporting roof structure is capable of supporting the weight of the unit s and the accessories during installation and service See 5 2 Ceiling Unit Weights Securely anchor the top ends of the suspension rods and verify that all nuts are tight The evaporator unit and indoor condensing unit are usually mounted above the ceiling and must be securely mounted to the roof structure The ceiling and ceiling supports of existing buildings may require reinforcements Be sure to follow all applicable national state and local building codes Use field supplied 1 2 13 TPI threaded suspension rods and 1 2 13 TPI factory hardware kit Recommended clearance between ceiling grids and building structural members is unit height plus 3 76mm
4. Table 24 Troubleshooting continued Symptom Reheat will not operate Possible Cause DIP switch not set to enable reheat option Check or Remedy See DIP switch settings Table 23 HEAT not displayed at the control panel Increase temperature setpoint to require heating Reheat safety open defective reheat contact or defective board Check voltage at P34 4 or P34 6 to P34 10 on interface board for 24 VAC 2 VAC If voltage check reheat contactor and reheat safety If no voltage check wiring and or replace board Element is burned out Turn off power Check element continuity with Ohm meter Cooling cycle too short Sensor response delay too short Increase sensor response delay See 6 12 Calibrate Sensors Display freezes and control pads do not respond Static discharge During period of low humidity static electricity can cause the control program to freeze or display incorrect information Although this is unlikely the control can be reset by cycling power from the disconnect switch Condensate pump does not operate Open or short circuit in wiring Find open or short circuit and repair power to pump Continuous Cooling Failed temperature sensor Temperature display will indicate dashes Check wiring from temperature humidity board remote sensors to the control board or from control board to wallbox Replace temperature humidity circuit board remote
5. Install the four field supplied rods by suspending them from suitable building structural members Locate the rods so that they will align with the holes in the four hanging brackets factory secured in the unit base Using a suitable lifting device that is rated for the weight of the unit see 5 2 Ceiling Unit Weights raise the unit and pass the threaded rods through the holes in the four hanging brackets factory provided in the unit base Attach the threaded rods to the hanging brackets using the factory supplied hardware kit See Figure 13 The coil springs provide vibration isolation 1 Use the plain nuts to hold unit in place Adjust these nuts so that the weight of the unit is supported by the four rods does not rest on the ceiling grid and is level Ensure none of the springs are compressed to solid height The coil side of the unit is heavier so these springs will be compressed more than the other side NOTE The units must be level in order to drain condensate properly 2 Use the Nylock nuts to jam the plain nuts Figure 13 Threaded rod and hardware kit installation 1 2 Threaded Rod field supplied Hanging 74 Bracket 1 O D Spring 1 2 Flat Washer 1 2 Nylock Locking Nut Base Pan ref 1 2 Hex Nut Liebert Mini Mate2 18 Site Preparation and Installation 5 4 1 Close Coupled Installations If the evaporator and condensing units are to be mounted side to side close cou
6. the time delay should be left at the factory default of 0 Table 19 Alarm default time delays Default Time Delay Alarm seconds Hum Prob 2 Chng 2 Custom Alarm 1 0 Custom Alarm 2 0 Custom Alarm 3 0 High Temperature 30 Low Temperature 30 High Humidity 30 Low Humidity 30 Short Cycle 1 amp 2 0 Loss of Power 0 6 15 Common Alarm Enable Each individual alarm can be selected to activate or deactivate the common alarm relay If the energize common alarm function is set to YES the relay is energized immediately as the alarm is annunciated and de energized when the alarm condition has been resolved If the alarm is disabled the alarm has no effect on the common alarm relay Use the UP DOWN arrows to scroll to a particular alarm press the ENTER button to select it then press the ENTER key again to select YES or NO 6 16 Custom Alarms The custom alarm messages can be selected from a list of standard alarm messages or the operator can write his her own message A MAXIMUM OF THREE 3 ALARM MESSAGES CAN BE CUSTOMIZED The text for custom alarms can be changed at any time by selecting CUSTOM ALARMS To change the text for a custom alarm select the alarm you would like to change 1 2 or 3 Using the UP DOWN arrows step through the list of seven standard alarm messages listed below and two custom alarms Select the alarm message desired and store it by pressing ENTER SM
7. Common Alarm Liebert Mini Mate2 52 Microprocessor Control Test Inputs With the unit On and the fan running the input states may be displayed for the following devices Input Power High Water in Pan High Head 1 High Head Comp2 Air Sail Switch requires additional factory installed components Filter Clog Humidifier Prob Custom Alarm 1 Custom Alarm 2 Custom Alarm 3 Test Micro By selecting this function the microcontroller will perform a sel test lasting approximately 10 seconds When the test is complete the display will show the ROM checksum ROM part number and the firmware revision number 53 Liebert Mini Mate2 Microprocessor Control Figure 33 Control menu Status Display 72 F 50 RH NO ALARMS Menu Setpoints Status Active Alarms Alarm History Time Date Setback Setup Operation Setpoint Password Setup Password Calibrate Sensor Alarm Enable Alarm Time Delay Com Alarm Enable Custom Alarms Custom Text Diagnostics End of Menu Setpoints Temp Setpt Temp Sens Hum Setpt Hum Sens Hi Temp Alm Lo Temp Alm Hi Hum Alm Lo Hum Alm Status Dx Cool CW Valve Econo Cool Heat Dehumidify Humidify Active Alarms No Alarms or Alarm 01 of 01 High Head Setack Wknd Time 1 On Off Wknd Temp 1 Wknd Tsens 1 Wknd Humd 1 Wknd Hsens 1 Wknd Time 2 On Off Wknd Temp 2 Wknd Tsens 2 Wknd Humd 2 Wknd Hsens 2 Wkdy Time 1 On Off Wkdy Temp
8. Use flexible duct work or non flammable cloth collars to attach duct work to the unit and to help control the transmission of vibrations to building structures Duct work must be insulated to prevent condensation during the cooling cycle A vapor barrier is required to prevent absorption of moisture from the surrounding air into the insulation If the return air duct is short or if noise is likely to be a problem sound absorbing insulation should be used on the duct Duct work should be fabricated and installed in accordance with national state and local codes Table 7 Evaporator external static pressure 60Hz at 3750 CFM 6371 CMH Low Static Drive 2 hp Motor High Static Drive 3 hp Motor Turns External Open RPM External Static in RPM Static in 0 N A 1146 1 9 0 5 N A 1125 1 8 1 0 N A 1104 1 7 1 5 946 0 9 1083 1 6 2 0 922 0 8 1063 1 5 2 5 972 0 7 1042 1 4 3 0 899 0 6 1021 1 3 3 5 851 0 5 1000 1 2 4 0 828 0 4 979 1 1 4 5 804 0 3 958 1 0 5 0 780 0 2 938 0 9 5 5 757 0 1 917 0 8 6 0 733 0 896 0 7 If free cooling or hot water coil is ordered reduce available external static pressure by 0 3 8 mm Contact your Emerson representative for other air volumes Factory setting is 0 5 13mm with 2 hp motor Field adjust to suit application NOTE Maximum return air static pressure should not exceed 0 3 8 to provide proper drainage of the unit 5
9. 65 F 18 3 115 F 46 C Operation below 65 F 18 C may result in reduced valve life and fluid noise 5 1 1 Room Preparation The room should be well insulated and must have a sealed vapor barrier The vapor barrier in the ceiling and walls can be a polyethylene film Paint on concrete walls and floors should be vapor resistant NOTE The single most important requirement for maintaining environmental control in the conditioned room is the vapor barrier Outside or fresh air should be kept to a minimum when tight temperature and humidity control is required Outside air adds to the cooling heating dehumidifying and humidifying loads of the site Doors should be properly sealed to minimize leaks and should not contain ventilation grilles Liebert Mini Mate2 14 Site Preparation and Installation 5 1 2 Location Considerations NOTICE Risk of leaking water glycol Can cause equipment furniture and building damage Do not mount units over equipment or furniture that can be damaged by leaking water glycol Install a watertight drain pan with a drain connection under the cooling unit and ceiling mounted water cooled condensing unit Route the drain line to a frequently used maintenance sink so that running water can be observed and reported in a timely manner Post a sign to alert people to report water flowing from the secondary drain pan Do not mount units in areas where normal unit operating sound
10. The Smoke Sensor senses return air shuts down the unit upon sensing smoke and activates visual and audible signals at the wall box This smoke sensor is not intended to function as or replace any room smoke detection system that may be required by local or national codes High Temperature Sensor senses return air temperature and shuts down unit if temperature reaches 125 F 52 C This device is not meant to replace any fire detection system that may be required by local or national codes Switches and Motors Filter Clog Switch senses pressure drop across the filters and activates visual and audible alarms at the wall box display The wall box display annunciates the alarm audibly and flashes a notification upon reaching a customer setpoint A Factory Installed Non Fused Disconnect Switch allows unit to be turned off for maintenance A disconnect switch is standard for the evaporators chilled water units and indoor condensing units but these units may be specified without the switch 3hp Blower Motor is available for high static pressure applications 0 9 to 1 9in 23 to 48mm w g Standard 2hp motor allows for ESP of 0 5 in 13 mm Free cooling or hot water reheat coils reduce the available ESP by 0 3 8mm Maximum return air static pressure should not exceed 0 3 8mm for drain to work properly Free Cooling GLYCOOL free cooling coil can be ordered with the evaporator section This option contains a 3 way modulating valve
11. 1 Wkdy Humd 1 Wkdy Hsens 1 Wkdy Time 2 On Off Wkdy Temp 2 Wkdy Tsens 2 Wkdy Humd 2 Wkdy Hsens 2 Setup Operation Restart TD C F Degrees Humidity Control Lead Compr Dipswch 00000000 Pos 12345678 Valve Time CW Flush Setpoint Password Enter New PSW Setpt PSW 000 Setup Password Enter New PSW Setup PSW 000 Calibrate sensor Temp Cal Hum Cal Temp Delay Hum Delay Alarm Enable Hum Prob Chng Fitr Loss Air Custom 1 Custom 2 Custom 3 High Temp Low Temp High Hum Low Hum Short Cyc1 Short Cyc2 Fan Loss Pwr Alarm Time Delay Hum Prob ChngFilt Loss Air Custom 1 Custom 2 Custom 43 High Temp Low Temp High Hum Low Hum Short Cyc1 Short Cyc2 Fan Loss Pwr Com Alarm Enable Hum Prob Hi Head 1 Hi Head 2 Chng Fitr Loss Air Custom 1 Custom 2 Custom 3 Hi Water High Temp Low Temp High Hum Low Hum Short 1 Short Cyc2 Fan Loss Pwr Custom Alarms Custom Alarm 1 Custom Alarm 2 Custom Alarm 3 Custom Text Custom Text 1 Custom Text 2 Custom Text 3 Diagnostics Test Outputs Test Inputs Test Microcontroller Liebert Mini Mate2 54 Microprocessor Control Figure 34 Control board inside evaporator TB3 4 Connection to Terminal 4 Wallbox TB3 3 Connection to Terminal 3 Wallbox TB3 2 Connection to Terminal 2 Wallbox TB3 1 Connection to Terminal 1 Wallbox P16 P16 Remote Sensor Connection u P22 P38 P39 P3
12. 3 2 4 Evaporator Section Split System The evaporator section is designed for ceiling installation The cabinet and chassis are constructed of heavy gauge galvanized steel The unit can be serviced using only one side increasing its versatility in mounting locations Mounting brackets are factory attached to the cabinet Internal cabinet insulation meets ASHRAE 62 1 requirements for Mold Growth Humidity amp Erosion tested per UL 181 amp ASTM 1338 standards The evaporator section includes includes a dual circuited evaporator coil R 407C charge filter driers expansion valves adjustable belt driven blower assembly and a microprocessor control with wall mounted control box Unit is provided with supply and return air openings for field supplied ducting Evaporators can be configured with canister humidifier and or reheat An indoor or outdoor condensing unit must be selected for each evaporator Condensing Unit Section Split System Indoor Centrifugal Fan Condensing Units Indoor Air Cooled Centrifugal Condensing Units include 3 ton and 5 ton scroll compressors dual circuited condenser coil with R 407C refrigerant charge adjustable belt driven centrifugal blower assembly factory mounted disconnect switch high pressure switches and built in Liebert Lee Temp head pressure controls hot gas bypass liquid line solenoid valves and receivers for operation down to 30 F 34 C ambient Duct flanges are provided Condensing unit
13. 3 16 102mm Typ 1351mm 2 51mm Typ sau 637mm 816mm 51mm 46 7 32 1174mm DPNO000131 Footprint Dimensions Rev 0 36 1 8 918mm 1 2 Bolt Down Holes 6 Places 4 23 32 120mm Table 14 Dimensions and weight Prop Fan Condensing modules Model Dimensions in mm Net Weight 60Hz 50Hz A B C D Ib kg PFH096A L PFH095A L 53 1343 36 1 4 918 38 1 2 978 5 1 2 140 570 259 Source DPN000131 Rev 0 Liebert Mini Mate2 36 Site Preparation and Installation Figure 26 Piping and electrical connections outdoor condensing unit System 2 5 Ton Electrical Entrance for High Voltage Connection Electrical Entrance for Low Voltage Connection Liquid Line Quick Connect Male Coupling Suction Line DPNO0001933 Quick Connect 0 Male Coupling System 1 3 Ton System 1 and System 2 on 8 Ton only Table 15 Piping and electrical connections Model Numbers Electrical Connections In mm Piping Connections In mm 60 Hz 50 Hz A B C D E F G 2 6 8 1 2 4 3 4 7 3 4 8 1 2 11 1 2 EEHO9SA L 152 216 121 197 216 292 Source DPN000133 Rev 0 5 7 Indoor Water Cooled and Glycol Cooled Condensing Unit Installation NOTE Follow all national state and local building electrical and plumbing codes 5 7 1 Loca
14. 5 4 1 Close Coupled Installations 0 0 0 0 kK KK KK kK KK KK KK KK KK kK kk kk n 19 5 4 2 Evaporator Air Distribution xe yay Wa Pey s w tenet A has 19 5 4 3 Electrical Connections Evaporator or Chilled Water 20 544 Piping Connections and Coolant 23 5 5 Indoor Air Cooled Centrifugal Fan Condensing Unit Installation 30 5 6 5 7 5 8 5 9 6 0 6 1 6 2 6 3 6 4 6 5 6 6 6 7 6 8 6 9 6 10 6 11 6 12 6 13 6 14 6 15 6 16 6 17 6 18 Location Considerations iav Ra eR ERES E YE REM NAR RE EE YR a 30 5 5 2 Electrical Connections Condensing Unit 30 Piping Conn ctionss oves Ee Eh ue te ED RE EUMD E 31 9 554 m RR m eo SR ec nx ETC e T 31 Outdoor Air Cooled Condensing Unit 34 5 6 1 Location Considerations i use Epson Eo yl qe r OU E 34 5 6 2 Electrical Connections cope DRIVES del ba EH E BH EAS OE es 34 5 6 3 Piping Connections ogee aa Po ey din eee eee AW la ek ln GRO 34 Indoor Water Cooled and Glycol Cooled Condensing Unit Installation 37 5 71 13 Location Considerations veu a seen ze uae vs wu ee 37 O25 Electrical Connections asec cits ee
15. a layer of insulating material which causes a drop in current flow As this happens the water level in the canister will slowly rise exposing new electrode surface to the water to maintain normal output Eventually the steady state water level will reach the canister full electrode and indicate so by activating the canister full alarm At this point all of electrode surface has been used up and the canister should be replaced 6 After the entire electrode surface has been coated the output will slowly decrease During these last hours of electrode life the mineral concentration can increase and arcing can occur If the electrodes start to arc turn off the humidifier immediately and replace the canister with the identical part Liebert Mini Mate2 68 System Operation Testing and Maintenance 9 3 3 Replacing the Humidifier Canister A CAUTION Risk of extremely hot surfaces Can cause injury Do not attempt to replace parts until the humidifier has cooled down to a temperature that is safe for human contact Allow time for the humidifier to cool before replacing parts The proper procedure to replace the humidifier canister is 1 Turn Off the humidifier by lowering the humidity setpoint below the ambient humidity level Record the original setpoint Turn unit Off at wallbox Place the RUN DRAIN switch in the DRAIN position to drain the water from the canister Return the RUN DRAIN switch to the RUN position after the canist
16. and equipment Use a filter drier when charging the system with recovered refrigerant NOTE Release of refrigerant to the atmosphere is harmful to the environment and unlawful Refrigerant must be recycled or discarded in accordance with national state and local regulations 4 Remove failed compressor 5 Install replacement compressor and make all connections Use a flow of dry nitrogen through the piping during brazing to prevent formation of copper oxide scale inside the piping Copper oxide forms when copper is heated in the presence of air POE oil will dissolve these oxides from inside the copper pipes and deposit them throughout the system clogging filter driers and affecting other system components A pure dry nitrogen flow of 1 3 ft min 0 5 1 5 l s inside the pipe during brazing is sufficient to displace the air Control the flow using a suitable metering device Pressurize and leak test the system at approximately 150 psig 1034kPa pressure Follow manufacturer s instructions for clean out kits Evacuate the system twice to 250 microns Break the vacuum each time with clean dry nitrogen Evacuate the system a third time to 250 microns Charge the system with refrigerant R 407C based on requirements of the evaporator condensing unit and lines Refer to the unit nameplate 10 Apply power and operate the system Check for proper operation Refer to Table 22 67 Liebert Mini Mate2 System Operation Te
17. and replacement procedures Use copies of the Maintenance Inspection Checklist to record preventive maintenance inspections A WARNING Risk of electric shock Can cause injury or death Open all local and remote electric power disconnect switches before working within the electrical enclosures The Liebert microprocessor control does not isolate power from the unit in the Unit Off mode Some internal components require and receive power even during the Unit Off mode The line side of the disconnect switch on the front of the unit contains live high voltage The only way to ensure that there is NO voltage inside the unit is to install and open a remote disconnect switch and check the internal power supply wires with a voltmeter System Testing Environmental Control Functions The performance of all control circuits can be tested by changing the setpoints which activates each of the main functions Cooling To test the cooling function set the setpoint to a temperature of 10 F 5 C below room temperature A call for cooling should register and prompt the equipment to begin cooling cycle Disregard any temperature alarms Upon completion of testing return setpoint to the desired temperature Heating Reheat may be tested by setting the setpoint 10 F 5 C above room temperature A call for heating should register and prompt the equipment to begin heating cycle Disregard any temperature alarms Upon completion of testing return
18. board aroni ae eo a ea E EE c W n va kel We e een cnet I as 51 Typical discharge hrs 64 Humidifier control board DIP switch 69 Troubleshooting tup eae de des dedi tow aa cen AD a ou 71 Important Safety Instructions IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important safety instructions that should be followed during the installation and maintenance of the Liebert Mini Mate2 Read this manual thoroughly before attempting to install or operate this unit Only properly trained and qualified personnel should move install or service this equipment Adhere to all warnings cautions and installation operating and safety instructions on the unit and in this manual Follow all installation operation and maintenance instructions and all applicable national state and local building electrical and plumbing codes A A A A A A WARNING Arc flash and electric shock hazard Disconnect all electric power supplies and wear protective equipment per NFPA 70E before working within electric control enclosure Failure to comply can cause serious injury or death Customer must provide earth ground to unit per NEC CEC and local codes as applicable Before proceeding with installation read all instructions verify that all the parts are included and check the nameplate to be sure the voltage matc
19. crystal display A seven key membrane keypad for setpoint program control unit On Off and alarm silence is below the LCD screen It provides temperature setpoint and sensitivity adjustment humidity setpoint and sensitivity adjustment digital display of temperature humidity setpoints sensitivities and alarm conditions The wall box is field wired to the microprocessor control using standard four conductor thermostat wire field supplied The temperature and humidity sensors are in the wall box which can be installed up to 300 feet 91 4m from the evaporator unit The unit mounted control board also includes common alarm terminals and shutdown terminals The unit automatically restarts after a power outage Liebert Mini Mate2 8 Standard Features 8 Ton Systems 2 4 4 Three Stage Cooling A unique compressor staging system utilizes independent 3 ton and 5 ton circuits to provide better control of room conditions The unit microprocessor continuously monitors recent cooling operation and selects the most economical cooling stage to satisfy demand 2 4 2 Other Standard Control Features Adjustable auto restart Calibrate sensors 5 day 2 day setback Predictive humidity control Password protection Common alarm output Alarm enable disable Remote shutdown terminals Self diagnostics Figure6 Improved load tracking Three Stage Cooling 10096 7296 46 Capacity Stage 1 Stage 2 Stage 3 Figure 7 Wall bo
20. electrical enclosures CAUTION Risk of contact with hot surfaces Can cause injury The refrigerant discharge lines humidifiers and reheats are extremely hot during unit operation Allow sufficient time for them to cool before working within the unit cabinet Use extreme caution and wear protective gloves and arm protection when working on or near hot discharge lines humidifiers and reheats CAUTION Risk of sharp edges splinters and exposed fasteners Can cause injury Only properly trained and qualified personnel wearing appropriate safety headgear gloves shoes and glasses should attempt to move the unit lift it remove packaging from or prepare the unit for installation 1 Liebert Mini Mate2 Important Safety Instructions NOTICE Risk of leaking water glycol Can cause equipment and building damage Improper installation application and service practices can result in water glycol leakage from the unit Do not mount this unit over equipment or furniture that can be damaged by leaking water glycol Install a watertight drain pan with a drain connection under the cooling unit and the ceiling mounted water glycol condenser unit Route the drain pan to a frequently used maintenance sink so that running water glycol can be observed and reported in a timely manner Post a sign to alert people to report water glycol flowing from the secondary drain pan Emerson recommends installing monitored leak detection equipment for un
21. is active Custom alarm 2 Normally off unless this special customer selectable alarm is active Power Normally on unless unit is turned off through the wall box or any of the following optional devices High Temperature Sensor Smoke Sensor High Water Alarm or Remote Shutdown Test Outputs When this feature is selected the controller is effectively turned off When stepping from one load to the next the previous load is automatically turned off The loads can also be toggled on off by selecting ENTER Once turned on the output will remain on for five minutes unless toggled off or the test outputs function is exited by selecting MENU ESC Compressor is limited to 15 seconds on to prevent damage NOTICE Risk of overheating the compressor during the Test Outputs mode Can cause compressor damage Testing the compressor output for more than a few seconds can damage the compressor Do not operate the unit in the Test Outputs mode any longer than is necessary for troubleshooting NOTICE Risk of extended unit operation in the Test Outputs mode for troubleshooting Can cause damage to unit DO NOT operate unit in the Test Outputs mode any longer than is necessary for troubleshooting NOTE Fan turned on with all loads The outputs are Main Fan Compr1 3 ton 1 amp HGBP1 Compr2 Compr2 amp HGBP2 Compr1 amp Compr2 Chill Water Gly if present Reheat 1 Reheat 2 SCR Reheats if present Humidifier
22. is rated at 95 F 85 C ambient air Outdoor Prop Fan Condensing Units Outdoor Prop Fan Condensing Units include 3 ton and 5 ton scroll compressors two condenser coils propeller fan high pressure switches hot gas bypass Liebert Lee Temp head pressure controls liquid line solenoid valves and built in receivers for operation down to 30 F 34 4 C ambient Condensing unit is rated at 95 F 35 C ambient air Indoor Water Glycol Condensing Units Indoor Water Glycol Condensing Units include 3 ton and 5 ton scroll compressors coaxial condensers R 407C refrigerant charge high head pressure switches factory mounted disconnect switch hot gas bypass and 2 way water glycol regulating valves Design pressure is 150psi 1034kPa Condensing unit can be used on either water or glycol loops Chilled Water Units Chilled Water Units include chilled water coil 2 way proportional modulating valve adjustable belt driven blower assembly and factory mounted disconnect switch Design pressure is 400psi 2757kPa 86psi 593 close off differential Unit is provided with supply and return air openings for field supplied ducting Unit insulation meets ASHRAE 62 1 requirements for Mold Growth Humidity amp Erosion tested per UL 181 amp ASTM 1338 standards System Controls System controls include a microprocessor control board mounted in the evaporator chilled water unit and a wall mounted interface with a two line 16 character liquid
23. reheats are turned on at 25 cooling reheat 1 and 25 heating reheat 2 for improved temperature control The reheats are deactivated at 0 and 50 cooling requirement respectively If overcooling occurs the first stage of dehumidification is disabled at 125 call for heating If 1 stage or 2 stage is selected dehumidification is disabled at 200 call for heating Dehumidification is re enabled at 66 call for 2 stage and 33 call for 1 stage Humidification Operation System Activation The humidifier is activated when the humidity control calculates a requirement for 100 humidification and is deactivated when the requirement falls below 50 Dehumidification Lockout Dehumidification is locked out if overcooling occurs Dehumidification on the 8 ton unit is disabled at 125 first stage and 200 all stages heating requirement Dehumidification is re enabled at 66 and 33 heating requirement Load Control Features The control system monitors the compressor and prevents it from turning on within a 38 minute period of being off If this On Off cycle occurs too often e g 10 times within 60 minutes a Short Cycle Alarm will occur 57 Liebert Mini Mate2 System Performance Microprocessor Controls 7 6 Communication The control system uses a two wire RS 422 channel to communicate with Liebert Site Products via a proprietary protocol The NIC ENCL1 and NIC ENCL2 package one or two Liebert IntelliSlot Web 485 Cards
24. sensors or wallbox Continuous Heating Dehumidification Humidification Shorted wiring or failed control board Check wiring and or replace control board Display Problem Incorrect wiring Review 5 4 3 Electrical Connections Evaporator or Chilled Water Unit Verify VDC between 5 to 6 Volts at TB 3 Pin 1 Ground and TB 3 Pin 2 of the control board and wall box If the transmit lines TB 3 Pin 3 amp 4 are not connected only the POWER LED will be lit It will flash once every 10 12 sec If T is connected but not T TX1 will flash approximately every 2 3 sec And the POWER LED will flash once every 10 12 sec If T and T are reversed the POWER LED and RX1 Will be lit and flash every 10 12 sec NOTE Erratic operation of the unit could occur If no LED is lit there is no power or the 5VDC polarity is reversed If any of these conditions occur remove power from the evaporator using the disconnect switch and correct wiring from the control board to the wall box NOTE It may take up to 20 seconds for the display to appear on the wall box LCD after power is applied Liebert Mini Mate2 72 Troubleshooting NOTES 73 Liebert Mini Mate2 Troubleshooting Liebert Mini Mate2 74 Ensuring The High Availability Of Mission Critical Data And Applications Emerson Network Power a business of Emerson NYSE EMR is the global leader in enabling Business Critical Continuit
25. the evaporator unit and the condensing unit if applicable Control wiring between the control panel wallbox and the evaporator or chilled water unit control board Power supply to outdoor condensing unit if applicable Power Connections All power and control wiring and ground connections must be in accordance with the National Electrical Code NEC and local codes Refer to Unit serial tag data for electrical requirements A WARNING Risk of loose electrical wiring connections Can cause overheating of wire smoke and fire resulting in building and equipment damage serious injury or death Use copper wiring only Verify periodicallythat all connections are tight Voltage supplied must agree with the voltage specified on the unit serial tag If a field supplied disconnect switch 18 required it may be bolted to the ceiling unit but not to any of the removable panels This would interfere with access to the unit Make sure that no refrigerant lines are punctured when mounting the disconnect switch Route the electrical service conduit through the hole provided in the cabinet and terminate it at the electric box Make connections at the factory terminal block or disconnect switch L1 L2 L3 Connect earth ground to lug provided See transformer label for primary tap connections Installer will need to change transformer primary taps if applied unit voltage 18 other than pre wired tap voltage An optional single point power kit is avail
26. with Adapters respectively in one steel enclosure for installation external to the Liebert Mini Mate2 The Liebert IntelliSlot Web 485 Card with Adapter provides communication with the Liebert Mini Mate2 via SNMP HTTP RTU Modbus 485 and BACnet IP The self contained kit includes an external 120VAC to 24VAC transformer as a power source Wiring harnesses are not provided Power and communication wiring are field provided The communications channel provides both monitoring and control options including TEMPERATURE HUMIDITY Current temperature and humidity readings STATUS Cooling heating and humidify dehumidify operating status PRESENT ALARMS Alarms currently activated SETPOINTS Temperature Setpoint Temperature Sensitivity Humidity Setpoint Humidity Sensitivity High Temperature Alarm Low Temperature Alarm High Humidity Alarm Low Humidity Alarm ON OFF STATUS and CONTROL SILENCE ALARM Liebert Mini Mate2 58 Alarms 8 0 ALARMS 8 1 The microprocessor control system will audibly and visually signal all ENABLED Alarms including two 2 custom alarms These special alarms can be chosen from the optional alarm list and or can have their own fully custom text The custom alarm inputs are contact closures wired from terminal 24 through a normally open contact to either 50 alarm 1 51 alarm 2 or 56 alarm 3 The alarms can be enabled disabled refer to 6 0 Microproce
27. with pump kit must be installed on pump end 2 The High Water Safety Float included with pump must be interlocked with unit control Wire to terminals 60 amp 61 on evaporator terminal strip to shut down unit DPNO000239 Rev 1 Humidifier Water Supply Line Units supplied with the optional humidifier package have a 1 4 in 6 4 mm copper compression fitting connection for water inlet Supply pressure range is 10 psig to 150 psig Required flow rate is 1 gpm 3 8 Ipm A shutoff valve should be installed in this line to isolate the humidifier for maintenance NOTE DO NOT route humidifier supply line in front of filter box access panel Liebert Mini Mate2 24 Site Preparation and Installation Chilled Water Piping Chilled Water Systems Only Refer to Figure 18 for recommended field installed hardware such as shutoff valves and hose bibs Chilled water supply and return lines must be insulated to prevent condensation The minimum recommended water temperature is 42 F Connection sizes are 1 3 8 34 9mm OD copper Figure 18 General arrangement diagram chilled water systems Bleed Valve Chilled Water Chilled Supply Water Chilled Water Coil Return p Chilled Water Control Valve Shutoff ber Valves is 2 Return 3 Way Chilled Water Z Control Valve Optional Hoses Components are not supplied by Emerson but Field Piping Bib are recom
28. 1 Designed to Match Computer and Electronic Equipment Needs From Installation to Operation Installed above the ceiling the system controls the cooling humidity and air distribution required by sensitive electronic equipment A range of sizes and configurations are available to meet site needs The Liebert Mini Mate2 is also easy to use Advanced microprocessor technology allows easy precise control and menu driven monitoring keeps you informed of system operation through the LCD readout These features combined with Liebert quality construction and reliable components guarantee satisfaction from installation through operation Liebert Precision Cooling Liebert Precision Cooling systems are designed to control the temperature and humidity required for computers and other sensitive electronic equipment Liebert Mini Mate2 provides complete control on an around the clock basis as well as the high sensible heat ratio required by sensitive electronic equipment Easy Installation The Liebert Mini Mate 2 is a split system air water or glycol cooled unit or a self contained chilled water unit Each split system has thermostat type wiring to the controls and condensing unit Easy to Service Low maintenance components are easily accessed through removable panels Spare parts are always in Liebert s inventory and available on short notice Advanced Control Technology A menu driven microprocessor control system provides precise temperat
29. 3 7 3 8 Field Piping NOTE If free cooling is applied to an open water tower an optional cupro niche CuNi coil is required to prevent premature corrosion or a heat exchanger must separate the tower water from the free cooling loop The cupro nickel coil requires an extended lead time S Optional Configuration Prop Fan Condensing Units Outdoor Prop Fan Condensing Units are available with condenser coils that can be phenolic coated for extended coil life in coastal areas Optional Configurations Water Glycol Condensing Units Indoor Water Glycol Condensing Units are available with the following piping options 2 way water regulating valves with 350psi 2413kPa design pressure 3 way water regulating valves with 150psi 1034kPa design pressure 3 way water regulating valves with 350psi 2413kPa design pressure Optional Configuration Chilled Water Units Chilled Water units are available with 3 way modulating chilled water valve rated for 400psi 275 7kPa operating pressure Valve is non spring return 11 Liebert Mini Mate2 Ship Loose Accessories Field Installed 4 0 SHIP LOOSE ACCESSORIES FIELD INSTALLED 4 1 Filter box kit for ducted applications includes filter box with duct flange connection one 8 ASHRAE 52 2 2007 filter 20 x 25 x 4 508mm x 635mm x 102mm and a duct flange for use on the supply air opening of the unit
30. 3 Ras 55 Liebert Mini Mate2 System Performance Microprocessor Controls 7 0 SYSTEM PERFORMANCE MICROPROCESSOR CONTROLS 7 1 7 2 7 2 1 7 2 2 7 2 3 Control Type Response Proportional Control The percent requirement is determined by the difference between the return air temperature and the temperature setpoint As the return air temperature rises above the temperature setpoint the percent cooling required increases proportionally from 0 to 100 over a temperature band equal to the temperature sensitivity plus 1 degree Fahrenheit The heating requirement is determined in a similar manner as the temperature decreases below the setpoint With this control type the temperature at which the room is controlled increases as the room load increases At full load the room would be controlled at a temperature equal to the setpoint plus the sensitivity Cooling Multi Step Cooling Compressorized Direct Expansion DX Systems The system will use the 3 ton compressor 1 and 5 ton compressor 2 compressors in an 8 ton system The control will determine the average cooling requirement updated every hour and select the lead compressor or the user can select the lead compressor through the Setup Operation menu At startup the 3 ton compressor will be the lead compressor The compressors will be staged on with hot gas bypass energized at 50 and 100 cooling requirements The c
31. 4 3 Electrical Connections Evaporator or Chilled Water Unit A WARNING Arc flash and electric shock hazard Disconnect all electric power supplies and wear protective equipment per NFPA 70E before working within electric control enclosure Failure to comply can cause serious injury or death Customer must provide earth ground to unit per NEC CEC and local codes as applicable Before proceeding with installation read all instructions verify that all the parts are included and check the nameplate to be sure the voltage matches available utility power The Liebert microprocessor control does not isolate power from the unit even in the Unit Off mode Some internal components require and receive power even during the Unit Off mode The line side of the disconnect switch on the front of the unit contains live high voltage The only way to ensure that there is NO voltage inside the unit is to install and open a remote disconnect switch and check the internal power supply wires with a voltmeter Refer to unit electrical schematic Follow all applicable national state and local electric codes Liebert Mini Mate2 20 Site Preparation and Installation Each unit is shipped from the factory with internal wiring completed Refer to electrical schematic Figure 15 Figure 34 and Figure 35 when making connections Electrical connections to be made at the installation site are Power supply to each ceiling unit Control wiring between
32. 60Hz B 575V 3ph 60Hz Y 208 230V 3ph 60Hz M 380 415 3ph 50Hz H Hot Gas Bypass 7 R 407C Refrigerant Figure 3 Air cooled systems Outdoor prop fan condensing units PFH Prop Fan Condensing Unit w HGBP 0 Standard Sound Level Nominal Capacity kBtuh 96 8 Ton 60Hz 95 8 Ton 50Hz Air cooled Unit 0 96 L 7 Standard Coil EN C Coated Coil Supply Power 460V 3ph 60Hz B 575V 3ph 60Hz Y 208 230V 3ph 60Hz M 380 415 3ph 50Hz Liebert Lee Temp L 95 F 35 C Ambient 7 R 407C Refrigerant Liebert Mini Mate2 4 Model Number Nomenclature Figure 4 Water glycol cooled systems Indoor condensing units M Liebert Mini Mate2 C Condensing Unit D Disconnect Switch 0 No Disconnect Switch Nominal Capacity kBtuh Cooling Method W Water Glycol M C 98 W 2 A H 7 2 2 Way Standard Pressure Valve 3 3 Way Standard Pressure Valve D 2 Way High Pressure Valve Supply Power T 3 Way High Pressure Valve 460V 3ph 60 Hz B 575V 3ph 60Hz Y 208 230V 3ph 60Hz M 380 415V 3ph 50Hz H Hot Gas Bypass Refrigerant 7 R 407C 5 Liebert Mini Mate2 Model Number Nomenclature Figure 5 Model number nomenclature Chilled water units MM Liebert Mini Mate2 D Disconnect Switch 0 No Disconnect Switch D 8T Nominal Capacity 8T 8 Ton 60 50Hz Cooling Method C Chilled Water D Val
33. 70 Troubleshooting 11 0 TROUBLESHOOTING Table 24 Troubleshooting Symptom Unit will not start Possible Cause No power to unit Check or Remedy Check voltage at input terminal block Control voltage fuses at transformer open Locate and repair short Replace fuses Float switch relay has closed due to high water in the condensate pan Check drain and line Access through left panel Power must be cycled at the disconnect to reset Check return air static pressure is less than 0 3 wg Jumper not in place Check terminal 37 and 38 for jumper or N C contact Check pins P39 1 and P39 2 for jumper or N C firestat contact Check pins P40 12 and 1HWAR Com for jumper or N C smoke detector contact No cooling Cooling is not displayed at the control panel Adjust TEMP control setpoint and sensitivity to require cooling Short cycle prevention control Control software delays compressor 3 minutes cooling from stop to start Compressor contactor not pulling in Compressor high head pressure Check for 24 VAC 2 VAC at terminals TB2 to TB1 for Compressor 1 TB6 to TB5 for Compressor 2 If voltage is present check contactor If voltage is present check freeze stat FR1 and FR2 See below for cause Plugged filter dryer Replace filter dryer Low refrigerant charge Check pressure gauges At low ambient temperatures proper refrigerant charge is very
34. ATURE Figure 1 Model number nomenclature Evaporator Units MM Liebert Mini Mate2 D Disconnect Switch 0 No Disconnect Switch Nominal Capacity 96 8 Ton Evaporator 60 hz 95 8 Ton Evaporator 50 hz E Split Evaporator K Split Evaporator w Free Cooling Coil 3 way valve 7 R 407C Refrigerant MM 96 E 7 A H E L A Supply Power 460V 3ph 60Hz 575V 3ph 60Hz 208V 3ph 60Hz 230V 3ph 60Hz 380 415V 3ph 50Hz Humidifier H Humidifier 0 No Humidifier R Remote Humidifier Contact Reheat J Canister Humdifier amp Remote 0 No Reheat Humidifier Contact E Electric Reheat S SCR Reheat Fan Drive L Low Static Blower 2hp motor H High Static Blower 3hp motor Options 0 None Filter Clog B Smoke Sensor C High Temperature Sensor D Filter Clog amp Smoke Sensor E Filter Clog and High Temperature Sensor F Smoke Sensor amp High Temperature Sensor G Filter Clog Smoke Sensor amp High Temperature Sensor 3 Liebert Mini Mate2 Model Number Nomenclature Figure 2 Model number nomenclature Air cooled indoor condensing units MM Liebert Mini Mate2 Condensing Unit D Disconnect Switch 0 No Disconnect Switch Nominal Capacity 96A 8 Ton Air Cooled Centrifugal 60Hz 95A 8 Ton Air Cooled Centrifugal 50Hz MC D 96A L A H 7 L Lee Temp Head Pressure E Control Air Cooled Supply Power A 460V 3ph
35. EXT XFMR or XFMR24 Liebert SiteScan is a monitoring solution that gives you decision making power to effectively manage the equipment critical to your business Liebert SiteScan enables communication from Liebert environmental and power units as well as many other pieces of analog or digital equipment to a front end software package that provides real time status and alarms so you can react quickly to changing situations Liebert SiteScan is designed with flexibility for both small systems and large complex systems such as those in computer rooms telecommunications facilities or industrial process control rooms Contact your local Emerson representative for assistance with a Liebert SiteScan system The NIC ENCL1 and NIC ENCL2 package one or two Liebert IntelliSlot Web 485 Cards with Adapters respectively in one steel enclosure for installation external to the Liebert Mini Mate2 The Liebert IntelliSlot Web 485 Card with Adapter provides communication with Liebert Mini Mate2 via SNMP HTTP RTU Modbus 485 and BACnet IP The self contained kit includes an external 120VAC to 24VAC transformer as a power source Wiring harnesses are not provided Power and communication wiring are field provided 13 Liebert Mini Mate2 Site Preparation and Installation 5 0 SITE PREPARATION AND INSTALLATION NOTE Before installing unit determine whether any building alt
36. INSTALLED FEATURES EVAPORATOR CHILLED WATER UNITS 10 3 1 REHCAG s t Y di ambe du du er S Gt 10 3 2 PUPA CE ois he Se a ee ie 10 3 3 Sensors ico sd e ae whew o poet Ty bcr uos v Nace ptio eltog e ae v D MIEV 10 3 4 Switches and MOLOES os eso Pase e s PUR UR S FIERE ERAS CUR HR RUN E la ay a UIS Aa 10 3 5 FreezGooling ii EAN bau qe eO MS 10 3 6 Optional Configuration Prop Fan Condensing Units 11 3 7 Optional Configurations Water Glycol Condensing Units 11 3 8 Optional Configuration Chilled Water 11 4 0 SHIP LOOSE ACCESSORIES FIELD INSTALLED 12 4 1 Remote Monitoring Autochangeover and Leak Detection Equipment 12 5 0 SITE PREPARATION AND INSTALLATION kk kk kk kk kk kk a kk hh 14 5 1 Installation Considerations cave vno xuna kala k a SA wa SE k eke 14 Room Preparation 4 amp Ja 4a eR er ee a bees Bead pa ee 14 5 1 2 Location Considerations J as 15 5 2 Ceiling Unit Weights cesa ER WE CR Ra Da V eS Re HGS 17 5 3 Equipment Inspection Upon 17 5 4 Installing the Ceiling Units as Lan ek n r en e W RII RR Hn 18
37. IRING MAY BE REQUIRED AT THE FACTORY FOR SOME OF THE ALARMS Custom Alarms Custom alarm s messages are programmed at the LCD display The message displayed may be included in a list of provided alarms or it may be customized text for up to three alarms IF CUSTOMIZED TEXT IS USED MAINTENANCE PERSONNEL SHOULD BE INFORMED OF THE ALARM FUNCTION AND THE REQUIRED ACTION High Head Pressure Compressor head pressure is monitored with a pressure switch One SPDT pressure switch is used per refrigerant circuit If head pressure exceeds 400 psig 2785kPa the switch turns off the compressor contactor and sends an input signal to the control The condition is acknowledged by pressing the alarm silence button on the wall box which will clear if the high head pressure condition is alleviated If the head pressure alarm has activated three times the alarm will lock until the unit is serviced After the head pressure problem is fixed reset the control by disconnecting power to the evaporator unit Air Cooled Systems Check for power shut off to the condenser condenser fans not working defective head pressure control valves dirty condenser coils or crimped lines Water Glycol Systems Check water regulating valves Verify water glycol flow 1 pumps operating and service valves open Is water tower or drycooler operating Is the coolant temperature entering the condenser at or below design conditions Is AUX relay terminals 70 amp 71 op
38. LARM ENABLE ALARM TIME DELAY COM ALARM ENABLE CUSTOM ALARMS CUSTOM TEXT DIAGNOSTICS END OF MENU Use the UP and DOWN arrows to scroll through the selections when ready to select a particular function press Enter Setpoints Setpoints and system setup parameters are kept in nonvolatile memory Selecting SETPOINTS from the Main Menu will display the following selections TEMPERATURE SETPOINT TEMPERATURE SENSITIVITY HUMIDITY SETPOINT HUMIDITY SENSITIVITY HIGH TEMPERATURE ALARM LOW TEMPERATURE ALARM HIGH HUMIDITY ALARM LOW HUMIDITY ALARM Scroll through this submenu by using the UP and DOWN arrows then press ENTER to select particular function To change a particular value press ENTER and use the UP and DOWN arrows to change the value When the value has been changed press ENTER to store the value For example to change the temperature setpoint from the main status display 1 2 3 4 Press the MENU key to display main menu Scroll to SETPOINTS using the UP and DOWN arrows Press ENTER Scroll to TEMP SETPOINT using the UP and DOWN arrows Press ENTER Use the UP and DOWN arrows to change the value Press ENTER 45 Liebert Mini Mate2 Microprocessor Control 6 4 6 5 6 6 6 7 6 8 Table 16 Default setpoints and allowable ranges Setpoint Default Range Temperature Setpoint 72 F 40 90 F 5 32 C Temperature Sensiti
39. OKE DETECTED CUSTOM 2 CUSTOM 3 STANDBY GC PUMP WATER FLOW LOSS STANDBY UNIT ON CUSTOM 1 Liebert Mini Mate2 50 Microprocessor Control 6 17 Custom Text To modify the two custom alarm messages select CUSTOM TEXT Then select CUSTOM TEXT 1 Custom Text 2 or Custom Text 3 Text can be up to 16 characters in length and can be either a blank space or any of the following alphanumeric characters and symbols A B C D E F G H 1 J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 or 9 Use the UP DOWN arrows to select a character then press ENTER The cursor will move to the next space where you may once use the UP DOWN arrows to select another character etc The custom text alarm will be displayed only if the alarm is selected in CUSTOM ALARMS LCD Display Contrast The level of contrast due to the viewing angle of the LCD can be adjusted using a potentiometer screw inside the wall box next to the display Nonvolatile Memory All critical information is stored in nonvolatile memory Setpoints and setup parameters are kept inside the microcontroller in EEPROM Equipment Options Switches Equipment options are selected and enabled using DIP switches 1 through 7 These are located on the control board near TB3 These switches are factory set and should not require any user changes The setting and function of the switches can be individually read on the LCD NOTE To update the DIP switch sett
40. Outside North America 00800 1155 4499 Single Phase UPS amp Server Cabinets liebert upstech emerson com 800 222 5877 Outside North America 00800 1155 4499 Three Phase UPS amp Power Systems 800 543 2378 Outside North America 614 841 6598 Environmental Systems 800 543 2778 Outside the United States 614 888 0246 Locations United States 1050 Dearborn Drive P O Box 29186 Columbus OH 43229 Europe Via Leonardo Da Vinci 8 Zona Industriale Tognana 35028 Piove Di Sacco PD Italy 39 049 9719 111 Fax 39 049 5841 257 Asia 29 F The Orient Square Building F Ortigas Jr Road Ortigas Center Pasig City 1605 Philippines 63 2 687 6615 Fax 63 2 7309572 EmersonNetworkPower com AC Power Embedded Computing Outside Plant Racks amp Integrated Cabinets Connectivity Embedded Power Power Switching amp Controls Services DC Power Infrastructure Management amp Monitoring Precision Cooling Surge Protection Emerson Business Critical Continuity Emerson Network Power and the Emerson Network Power logo are trademarks of Emerson Electric Co or one of its affiliated companies 2009 Emerson Electric Co
41. P Swatch l945 bre ced gg TRUE 48 6 106 Valve Lie v eSI RAS So EU AE E t te Bus d e UR e s 48 61077 retos STA Set buses Opes Ree 48 Change Passwords vues exa Se SE 49 Calibrate Sensors rv heir er irse oos E te bow e 49 cen PTS ER GREE BEG ESD SEMA BE T eai du is 49 Alarm Tne oe te BE eda e si b E 50 Common Alarm Enable tase pustie cc cc ce eee s 50 Custom Alaris fected BEEN EEE CR RE DER Wan ERI 50 Custom cos ete eet hd tex Ata ante tetas Bao Sate peas A 51 SNOSEICS armes sank ta AE SIA Mas E PPAR MERRILL SAI NS 52 7 0 7 1 7 2 7 3 7 4 7 5 7 6 8 0 8 1 8 2 9 0 9 1 9 2 9 8 SYSTEM PERFORMANCE MICROPROCESSOR CONTROLS 56 Control Type Response Proportional 1 56 Cooling zonis Rime beue NU toe lie tise Se Sic hah tense bu P ie da end 56 7 2 1 Multi Step Cooling Compressorized Direct Expansion DX Systems 56 7 2 2 Chilled Water Cooling 8 ce es 56 7 2 8 GLYCOOL Coolmg 8 Ton v Exeter eae ORB LER eL epe um 56 Reheat MI JJ JNN Sb me nr M 57 Tad Reheat Stage Qis u okies wack UE RE see e ER Raley ees 57 17 3 2 OCR Electric hak sa
42. P2 llo G2 6364 G5 Oo Figure 35 Wall box board Qe ASSY 4153610 P2 U1 caz US g 5 As C23 R45 624 5 i 025 05 S R52 c28 P18 Il 02 R46 au CNDS D3 11054 Bm m TB3 1 uim mos 3 2 5V RIS TB3 3 m 4 J lt TPH TB4 4 VRI P20 N P C35 m s NP _ R55 Mu Y1 P21 gt 5 L TE Safe c31 R4 N P Us 629 4 Q R54 U3 G 7 R53 9 ar 2 R60 5 TPS TP3 R5 ze G C16 772 227 or Tre TEI cs pao 052 830 isi pa c I R31 5 ui Wall Box ct DIP Switches 1 8 RI ue R59 RHI e1 R15 R28 R42 Cz RTI RIO Ree R57 R16 3
43. Precision Cooling For Business Critical Continuity Liebert Mini Mate2 User Manual 8 Tons 50 amp 60Hz EMERSON Network Power TABLE OF CONTENTS IMPORTANT SAFETY 5 kk ak ak kk kk kk kk kk 1 MODEL NUMBER kk kk kk a kk a a kk ak hh ak kk eee 3 1 0 INTRODUCTION os yey aya a a EWE REKE eg ure das ay Ja 7 1 1 Designed to Match Computer and Electronic Equipment Needs From Installation sas Seg oes a tenete Sire ole Fe ALA ema Genel E pt o o get 7 2 0 STANDARD FEATURES 8 TON SYSTEMS 8 2 1 Evaporator Section Split System 8 2 2 Condensing Unit Section Split 8 2 2 1 Indoor Centrifugal Fan Condensing 8 2 2 20 Outdoor Prop Fan Condensing Units k kk kk kk KK KK teen KK KK KK k 8 2 2 8 Indoor Water Glycol Condensing k kK kk k KK KK KK KK KK KK KK KK kk kk kk 8 2 3 Water e oes S EE Ak hate GERI e WAK l Ov dw S 8 2 4 System Controls 24 w A et ORDERS sets Du SU esM ke 8 2 44 Thr e Stage Cooling ue RERO We u WS m en Wera Baten E DEIN SS rent 9 2 4 2 Other Standard Control Features liess n 9 3 0 OPTIONAL FACTORY
44. The Condensate Pump is field mounted on the outside of the cabinet wired to the unit power block and is equipped with a discharge check valve A secondary float is field wired to shut down the unit upon high condensate level Condensate Pump Mounting Bracket mounts on the end of the evaporator easing alignment and installation of the condensate pump A Remote Temperature and Humidity Sensor package includes sensors in an attractive case with 30 ft 9m of cable Can be wall or duct mounted Remote sensors should be used when the wall box is not located in the space to be conditioned NOTE Installing the remote sensors disables the sensors included in the wall box allowing the wall box to be mounted up to 300 ft 91m from the Liebert Mini Mate2 unit Field Installed Kits available for filter clog smoke sensor high temperature sensor electric reheat and humidifier The kits include installation instructions and are designed to be added to the evaporator unit before it is installed in the ceiling Electric reheat kits cannot be installed in units with free cooling Humidifier kit cannot be installed on units with SCR reheat The Refrigerant Line Sweat Adapter Kit contains four suction line and four liquid line fittings that allow field supplied refrigerant piping between the evaporator and condensing unit Single Point Power Kit contains the necessary electrical components to interconnect the high voltage sections of a close coupled evapo
45. a is not supplied sitescan Electric service not by Liebert Entrance for customer high volt connections NOTES 1 Refer to specification sheet for full load amp and wire size amp ratings 2 Control voltage wiring must be a minimum of 16 GA 1 3mm for up to 75 23m or not to exceed 1 volt drop in control line Electrical entrance for optional condensate pump on left side of unit Optional Single Point Power Kit Field Installed amp Wired Field supplied field wired thermostat wire to remote wall box Entrance for customer low voltage connections Entrance for customer low DPN000244 voltage connections Field supplied 24V NEC Class2 wiring to condensing unit if applicable Rev 3 Liebert Mini Mate2 22 Site Preparation and Installation 5 4 4 Piping Connections and Coolant Requirements Drain Line NOTICE Risk of water backing up in the evaporator coil drain line and overflowing the drain pan Leaking water can cause building and equipment damage Do not install an external trap in the drain line This line already has a factory installed trap inside the cabinet This line may contain boiling water Use copper or other suitable material for the drain line Sagging condensate drain lines may inadvertently create an external trap A 8 4 19 1mm NPT female connection is provided for the evaporator coil condensate drain This line also drains the humidifier if applicable The
46. able for units that are close coupled refer to Figure 15 and 5 4 4 Piping Connections and Coolant Requirements This kit should be mounted inside the evaporator unit before installing the unit in the ceiling Specific installation instructions are included with the single point power kit Control Connections 10 Wire on Air Cooled 8 Wire on Water Glycol Cooled A field supplied control connection 24 VAC is required between the evaporator and the condensing unit Control wiring must be installed in accordance with the National Electrical Code NEC Class 2 circuit Glycol cooled units also require a two wire control connection to the drycooler pump control box Class 1 circuit is required for water glycol units Control wiring between the evaporator and the condensing unit must not allow a voltage drop in the line of more than 1 volt 16 gauge minimum for 75 feet Do not connect additional electrical devices to the control circuit The internal control transformer is only sized for factory supplied components Additional control wiring will be required if your system includes other optional monitoring and control devices Four 4 wire thermostat type must be connected between the evaporator control board and the wall box See Figure 34 and Figure 35 and see Figure 15 for electrical connections 21 Liebert Mini Mate2 Site Preparation and Installation Figure 15 Evaporator unit electrical connections Customer Remote Al
47. appear bottom near left DOWN ARROW Decreases the value of displayed parameter while in a set mode bottom near right ENTER After setting a control point press ENTER to store the information in the microprocessor bottom far right Figure 32 Wall box Active alarms are displayed on the LCD screen and sound an audible beeper To silence an alarm press the ALARM SILENCE HELP key as prompted on the display Setpoints DIP switch settings and other selections were made during factory testing of the unit and are based on typical operating experience Other default selections were made according to options included with your unit MAKE ADJUSTMENTS TO THE FACTORY DEFAULT SELECTIONS ONLY IF THEY DO NOT MEET YOUR SPECIFICATIONS Allowable ranges are displayed by pressing the HELP key A password will be required if enabled to change setpoints time delays etc The display normally shown includes the present room temperature humidity active status functions cooling heating dehumidifying humidifying and active alarms The Status Display may also be selected from the Main Menu Liebert Mini Mate2 44 Microprocessor Control 6 2 6 3 Main Menu lt Menu gt Press the MENU key to display the Main Menu The menu selections in the following order include SETPOINTS STATUS ACTIVE ALARMS TIME DATE SETBACK SETUP OPERATION SET PASSWORD SETUP PASSWORD CALIBRATE SENSOR A
48. arm Connection TB50 51 56 24 Field supplied 24V Class 2 wiring Earth Ground Connection Connection terminal for field supplied earth grounding wire Common Alarn Connection Use field supplied 24V Class 2 wire TB75 76 Factory installed disconnect switch High Volt Power Connections Electric service connection terminals Drycooler Circulating Pump Control Circuit TB70 71 Optional W Glycool Econ O Cycle models Use field supplied 24V class 2 wire Optional Condensate Pump Auxiliary Float Switch Shut _ Down Connection ns TB60 61 Microprocessor Board Front of Unit Remote Control Panel Connection to TB3 1 2 3 4 connected with field supplied Thermostat wire 22ga shielded jacketed available from Liebert or others Heat Rejection Connection Field supplied 24V NEC Class 2 wiring TB1 10 See note 2 4 A Ba Remote Humidifier Contact Field Supplied 24V class 2 wiring to terminals 11 amp 12 located in field wire Remote Unit Shutdown Use field supplied Optional Remote Sensor 24V Class 2 wire Replace existing jumper Connection P16 1 2 3 4 between TB37 amp TB38 with NC switch having a minimum 75 VA rating Site Monitoring Connection Terminals TB78 TB77 are for compartment Field supplied unit disconnect switch gt connection 2 A beu pair when factory unit disconnect switch pa ion cable to option
49. aused by room cooling load is small compared to capacity of the unit If room load is low increase temperature sensitivity to reduce cycle Liebert Mini Mate2 60 Alarms 8 2 8 2 1 8 2 2 8 2 3 Optional Custom Alarms Change Filter Periodically the return air filters in the evaporator must be changed The Change Filter alarm notifies the user that filter replacement is necessary A differential air pressure switch closes when the pressure drop across the filters becomes excessive The switch is adjustable using the procedure on the switch label High Temperature Sensor The optional high temperature sensor is a bi metal operated sensing device with a closed switch under normal conditions Connected between pins 1 8 and 1 9 this device will shut down the entire unit Smoke Sensor The optional smoke sensor constantly samples return air through a tube Its power supply is located in the electric panel The smoke sensor shuts down the unit upon detecting smoke and activates visual and audible alarms This smoke sensor is not intended to function as or replace any room smoke detection system that may be required by local or national codes Locate the source of the smoke and follow appropriate emergency procedures 61 Liebert Mini Mate2 System Operation Testing and Maintenance 9 0 SYSTEM OPERATION TESTING AND MAINTENANCE 9 1 9 1 1 9 1 5 This section describes system testing maintenance
50. cc eee es 61 8 2 9 Smoke Sensors due swa eh use alain p REN E cadets EV Na RAW stu 61 SYSTEM OPERATION TESTING AND 62 System Testina xs EDO tdt hey te Bob SA a 62 9 1 1 Environmental Control 62 COONS oeste n tial ots bathe oy ci d cdit ates A 62 1 oi dae aria Sade cag cbe ate eo e ER rele e OR Era NE 62 Humadifieatioljs eere cette Me Te 62 97125 D hiurirdifiCAot10n oo Bets Er ee ese e e ee EE Ee RU 62 9 16 Remote Shutdown osse ec tcs oe tcr e we be neee 62 Maintenance and Component Operation 63 9 251 Electric Panek 5S deer eee rete ya o the e ir te e ege 63 ale CERE EAE e dan aee e LEN a ene MON A Hee 63 9 2 9 Blower System y n Xwe d ved uU reed uet el x e e SP SES e E 63 9 2 4 Electric Reheat cose ea SES Ge ele hed RAE lel Ee dk lk RECEN RE 64 9 275 2 Retrigeration Systemes cv ese eu er SU ERES YVES UE WESS 2 eaa 64 Replacement Procedures Wi 2 3A 22 ss kl Xw je u rs 66 iii 9 8 1 Compressor Replacement es 66 9 8 2 Steam Generating Humidifier Operation 68 9 8 8 Humidifier Circu
51. ce from evaporator guidelines as shown in Table 9 Install a solid base capable of supporting the weight of the condensing unit The base should be at least 2 inches 51mm higher than the surrounding grade and 2 inches 61mm larger than the dimensions of the condensing unit base For snowy areas a base of sufficient height to clear snow accumulation must be installed Electrical Connections Refer to 5 4 3 Electrical Connections Evaporator or Chilled Water Unit for general wiring requirements and cautions Refer to electrical schematic when making connections Power Connections The outdoor condensing unit requires its own power source and earth ground with a disconnect switch field supplied to isolate the unit for maintenance Control Connections Field supplied control wires must be connected between the evaporator and the condensing unit See Figure 21 and the electrical schematic on the units for more details Ten wires are required between the evaporator and condensing unit Piping Connections Details for Refrigerant R 407C Loop piping are in 5 4 4 Piping Connections and Coolant Requirements Liebert Mini Mate2 34 Site Preparation and Installation Figure 24 Electrical field connections outdoor condensing unit Field supplied unit disconnect switch Single or three phase pe electric service not provided by Liebert Field supplied 24V NEC class 2 wiring to evaporator module Factor
52. connection Water Glycol Outlet Connection Extends 3 1 2 88 9mm beyond panel exterior See Detail E _ 1 3 8 34 9mm OD Cu Water Glycol Inlet Connection Extends 3 1 2 88 9mm beyond panel exterior System 1 3Ton Suction Line Connection Aeroquip 11 Male System 2 5Ton Suction Line Connection Aeroquip 12 Male System 1 3Ton Liquid Line Connection Aeroquip 6 Male Removable Access Panel 7 8 22mm dia knockout System 2 5Ton Liquid Line Connection electrical entrance 7 8 22mm diameer Aeroquip 10 Male for alternate control panel Slectrical entrance low voltage routing for low voltage connection DPNO000250 P gp jm Qmm Rev 3 2 8 1 16 ME 205mm o Unit Weight C Model 3 7 8 vum 98mm 60Hz 50Hz Ib kg I TA i 181mm MC 98W MC 97W 470 213 154mm 8 9 16 217mm 1 12 9 16 319 elen Detail E DPN000251 16 9 16 421mm Natail N Back Of Unit _ __ Rev 0 39 Liebert Mini Mate2 Site Preparation and Installation Figure 28 Electrical field connections indoor water glycol condensing unit Field Supplied Unit Disconnect Switch when factory unit disconnect switch is not supplied Electric Service not Factory Installed by Emerson Disconnect Switch _ TI 4 Heat rejection connection Field supplied 24V NEC class 2 wirin
53. cooling coil outlet can be field piped to the condensing unit inlet if a 3 way regulating valve has been installed within the water glycol condensing unit see Figure 30 Figure 30 Optional free cooling coil 3 way valve on water glycol units Bleed Valve Fluid Tube in Tube Se Condenser Fluid Unit Supply to Unit Free Cooling Coil Shutoff N ds Valve p y A 2 22 GE 4 I Shutoff 3 Way Wat Hose 2 Z7 uto Hose 2 Fluid ay Bib ok 7 Valves Bibs 22 Regulating Valve ae Supply i N d to Unit OPtional 7 Recommended piping for units with free cooling coil option Components are not supplied by Emerson and water glycol condenser but are recommended for proper circuit operation and maintenance FACTORY PIPING DPN000241 FIELD PIPING Rev 2 Figure 34 Optional free cooling coil 3 way valve on air cooled units Bleed Valve Ir Free Cooling ies Control Fluid prom Valve Supply Unit Free Cooling to Unit y Coil n e Components are not supplied by Emerson Shutoff but are recommended for proper Temperature pk Sensor circuit operation and maintenance 2 Valves _ 2 e 2 P FACTORY PIPING DPNO000241 RE d FIELD PIPING Rev 2 Liebert Mini Mate2 42 Site Preparation and Installation 5 9 Checklist for Com
54. cy Two common alarm relay outputs are available A built in LCD and RS 232 port for direct PC terminal connection provides two options for configuration and monitoring of the product The Liebert ENV DO interface card provides 16 discrete outputs corresponding to status and major alarm conditions of Environmental units The Liebert ENV DO ENCL1 packages one Environmental DO interface card in its own steel enclosure and the ENV DO ENCL2 packages two Environmental DO interface cards in one enclosure for installation external to the Liebert Mini Mate2 The self contained kit includes an external 120VAC to 24VAC power transformer Wiring harnesses are not provided Power and communication wiring is field provided Liebert Mini Mate2 12 Ship Loose Accessories Field Installed The Liebert Liqui tect 410 Point Leak Detection Sensor detects the presence of conductive liquid using a pair of corrosion resistant gold plated probes mounted in a painted height adjustable enclosure Dual Form C dry contact common alarm relays rated at 24VAC 3A signal a leak detected as well as loss of power and cable fault The Liebert Liqui tect 410 requires an external 24VAC or 24VDC power source Liebert LT460 Zone Leak Detection Kits include one LT460 sensor a specified length of LT500 xxY cable maximum length is 100 ft 30 5m and a corresponding number of hold down clips The Liebert LT460 requires an external 24VAC 0 12A power source such as
55. d clean the system It is important to note that successive burnouts OF THE SAME SYSTEM are usually caused by improper cleaning If a severe burnout has occurred the oil will be black and acidic Liebert Mini Mate2 66 System Operation Testing and Maintenance Electrical Failure In the event of an electrical failure and subsequent burnout of the refrigeration compressor motor proper procedures must be followed to thoroughly remove any acids that would cause a future failure There are two kits that can be used with a complete compressor burnout Sporlan System Cleaner and Alco Dri Kleener Follow the manufacturer s procedure DAMAGE TO A REPLACEMENT COMPRESSOR DUE TO IMPROPER SYSTEM CLEANING CONSTITUTES ABUSE UNDER THE TERMS OF THE WARRANTY THEREBY VOIDING THE WARRANTY Replacement compressors are available from your Emerson supplier and will be shipped to the job site in a reusable crate as required by the service contractor If the compressor is under warranty it must be returned to Emerson in order to receive proper warranty credit It should be returned in the same container it was shipped in The possible cause s or condition s of the damage should be recorded on the provided return tag Replace a Failed Compressor Proper procedures to remove and replace the failed compressor are 1 Disconnect power 2 Attach suction and discharge gauges to access fittings 3 Recover refrigerant using standard recovery procedures
56. d st ect y ahs tendo ois ee Slee uem E 37 D 1 3 Pipin Connections Wakes cubes Qe WE nde ao ue eta eco tee ke lots nA E RE 38 Optional Equipment Piping RR RR e ls 42 5 8 1 Free Cooling Coil GLYCOOL KK KK KK KK KK KK KK KK KK KK KK KK KK KK rs 42 Checklist Tor Completed Installatiori 2 2a pe Dex as KK KK KK KI KK KK KK KK KK 43 MICROPROCESSOR CONTROL 4 4 kk kk kk kk a kk kk kk a kk a a kk a ak hh a kk kk nnn 44 Heatuire Overviews DR e fa buie b E desides 44 Main Menu Menus oui ser ab RI GIN RUPEE DS 45 DetDOLW 5 ce 3 lt De cea RAV n Mu emen Mee hens 45 s Ka a Ee ar ER a A dikan UM a d Lie esed d M 46 Active Alarms v eas Di i S cte rdiet on o AUN E LU 46 Alarm History onu roce s etos oro Led SA tem epitope e mend 46 Nis DD e e ee D DpD n n n mm mnn ng 46 Datesse lie varied 4 Sew PR ICH EES r r r 46 ea pez EUN alas Men Luar pea beer genos 47 Setup Operation wake rad NE ee vU tac Be OR IUS ase 47 6 1051 Restart Time Delays l ak Sao Rya emm ara e ek k eh cae A ana age 47 6 10 2 SCIB D6B T6682 enc 47 6 10 3 Humidity Control Method KK KK KK KK KK KK KK KK KK es 48 6104 Lead Compressor xm erste ret TE a an a e aye ke er rg 48 6 105 Show DI
57. drain line must be located so it will not be exposed to freezing temperatures The drain should be the full size of the drain connection The evaporator drain pan includes a float switch to prevent unit operation if drain becomes blocked Figure 16 Drain installation Continuous slope away from unit Do not externally trap the unit Correct Incorrect These are external traps also although unintentional Lines must be rigid enough to not sag between supports Humidifier drain water can approach 212 F 100 Incorrect 23 Liebert Mini Mate2 Site Preparation and Installation Condensate Pump The optional condensate pump kit is required when the evaporator is installed below the level of the gravity fed drain line Refer to the installation instructions provided with the condensate pump kit Figure 17 Condensate pump installation 3 8 Compression Fitting Power Supply from Drain Connection Electric Service Power Block in Fan Coil Module Route Wire down to avoid obstructing Filter Removal Drain Line field supplied Condensate Pump Evaporator or Chilled Water Unit 10 9716 Front of Unit 268 3mm Condensate Drain 3 4 13mm FPT Customer Connection 168 3mm 241 3mm Condensate Pump Support Bracket 3 4 13mm Hose Barb Supplied on Pump Tank Flexible Rubber Tubing Notes 1 3 4 13mm Flexible Rubber Tubing Assembly supplied
58. e Male Quick Valves ard L Factory Piping Connect Coupling amp y ox AMA Regulating Valve Hose Bibs Ha Notes Two circuits provided single circuit shown for clarity Components are not supplied by Liebert Condenser circuits are headered together DPN000247 but are recommended for proper circuit to form one supply connection and operation and maintenance Rev 1 return connection 41 Liebert Mini Mate2 Site Preparation and Installation 5 8 5 8 1 Optional Equipment Piping Free Cooling Coil GLYCOOL The free cooling coil is a secondary coil located upstream of the DX coil To take maximum advantage of available free cooling the secondary coil may operate at the same time as the DX coil A temperature sensor is factory mounted to the free cooling piping When fluid temperature is sufficiently below the room temperature cooling is provided by circulating the fluid through the secondary cooling coil flow is controlled by a motorized valve Compressors are staged on if needed to supplement the free cooling To keep deposits from building up in the free cooling coil the coil is flushed periodically NOTE If the free cooling coil is piped to an open water tower a Cu Ni cupro nickel type coil must be ordered to prevent corrosion of the copper tubes or a heat exchanger must separate the tower water from the free cooling loop On water cooled systems the free
59. e collected in the system Liebert Mini Mate2 48 Microprocessor Control 6 11 6 12 6 13 Table 18 Setup functions default values and allowable ranges Function Default Range Restart Time Delay 0 1 0 Degrees F C or F Humidity Control Rel Relative or Absolute Valve Time 165 50 to 250 seconds CW Flush 24 0 to 99 hours Change Passwords The display will prompt the operator to enter a three digit password when attempting to make changes The system includes two 2 passwords one for setpoints and one for setup The system allows the password to be changed by first entering the default password set at the factory 1 2 3 for setpoints and 8 2 1 for setup The password function provides system security so that only authorized personnel are allowed to make changes to the system If unauthorized changes are being made the passwords may be compromised and new ones should be selected The password function can be disabled by setting DIP switch 8 in the wall box to Off then resetting power to the unit Calibrate Sensors The temperature and humidity sensors can be calibrated by selecting the CALIBRATE SENSORS menu item The temperature sensor can be calibrated 5 F while the humidity sensor can be calibrated 10 RH When calibrating the humidity sensor the value shown will always be RH even though absolute humidity control may be selected If absolute humidity control is select
60. e operation can be determined by measuring superheat level If too little refrigerant 15 being fed to the evaporator then the superheat will be high Conversely if too much refrigerant is being supplied then the superheat will be low The correct superheat setting is between 10 and 15 F 5 6 and 8 3 C Only the 5 ton valve is adjustable Air Cooled Condensing Units Restricted airflow through the condenser coil will reduce the operating efficiency of the unit Additionally it can result in high compressor head pressure and loss of cooling Using compressed air or commercial coil cleaner clean the condenser coil of all debris that will inhibit airflow In winter do not permit snow to accumulate around the side or underneath the condenser At the same time check for bent or damaged coil fins and repair as necessary Check all refrigerant lines and capillaries for vibration and support as necessary Carefully inspect all refrigerant lines for signs of oil leaks Coaxial Condensers Water Glycol Cooled Condensing Units Each water or glycol cooled condensing unit has a coaxial condenser consisting of an exterior steel tube and an interior copper tube If the water supply is clean coaxial condensers do not normally require maintenance or replacement Should your system begin to operate at high head pressure with reduced capacity and all other causes have been eliminated the condenser may be obstructed or fouled and should be replaced Liebe
61. ed the Normal Status Display will display the adjusted reading This reading may not agree with the relative humidity reading displayed while in calibration If the sensors are subject to frequent wide temperature and humidity swings it may be necessary to shorten the cycling by increasing the sensor time delay If the sensors are located too close to the air discharge they will likely experience rapid swings in measurement Another method in reducing compressor cycling is to increase the temperature and or humidity sensitivity Alarm Enable Each alarm can be disabled or enabled Use the UP and DOWN arrows to select a particular alarm press ENTER to select either ENABLE or DISABLE Press ENTER again to store the change When the alarm is disabled it will NOT report to either the wall box beeper or to the common alarm relay NOTE The high water alarm will automatically shut the unit Off 49 Liebert Mini Mate2 Microprocessor Control 6 14 Alarm Time Delay Each individual alarm can be programmed with a time delay Table 19 causing the unit to delay a specified amount of time 0 255 seconds before recognizing the alarm The alarm condition must be present for the full amount of the time delay before the alarm will sound If the alarm condition is diverted prematurely the alarm will not be recognized and the time delay will automatically reset NOTE For software alarms such as loss of power and short cycle
62. er has drained Turn Off the power at the main unit Remove the cover from the humidifier cabinet oN Locate the power wires to the steam canister They are connected to the canister with 1 4 quick connects Make note of the wiring configuration before removing any wires Refer to schematic on unit Slide the rubber boot back to expose the connections Remove the three 8 power wires and the canister full wire Do not loosen the screws that secure the electrodes 8 Loosen the steam outlet hose clamps and slide the steam hose away from the canister fitting 9 Remove the canister 10 Reverse previous steps to reassemble humidifier Humidifier Circuit Board Adjustments A WARNING Risk of electric shock Can cause injury or death Open all local and remote electric power disconnect switches before working on the humidifier printed circuit board Circuit board adjustment should be performed by properly trained and qualified personnel only Power should be disconnected prior to the procedure The humidifier control board governs humidifier operation There are three potentiometers mounted on the board and can be used to adjust for extreme water conductivity conditions POT2 controls the amperage at which the drain will energize and is clearly marked in percentages This adjustment is factory set at 85 which indicates that the unit will drain when the amperage falls off to 85 of the capacity setpoint Raising the value increases
63. erating during cooling to turn on the drycooler 59 Liebert Mini Mate2 Alarms 8 1 3 8 1 4 Humidity The humidity alarm may be activated under the following conditions High The room return air humidity exceeds the pre set high humidity alarm setpoint Is the unit set up for dehumidification Check DIP switch Low The room return air humidity decreases to the low humidity alarm setpoint Is the unit setup for humidification Check DIP switch High and Low Humidity simultaneously The simultaneous display of two alarms results in loss of the humidity input signal DASHES WILL BE DISPLAYED IN THE HUMIDITY READING DISPLAY Under these conditions the control system deactivates both humidification and dehumidification Check for a disconnected cable or failed sensor NOTE Check for proper setpoints Does the room have a vapor barrier to seal it from outdoor humidity Are doors or windows open to outside air Temperature The temperature level alarm may be activated under the following conditions High The room return air temperature increases to the high temperature alarm setpoint Check for proper setpoint value Is the room load more than the unit can handle 1 capacity too small Make sure cooling components are operating compressor or valves Low The room return air temperature decreases to the low temperature alarm setpoint Check for proper setpoint value Make sure all heating components are operat
64. erations are required to run piping wiring and duct work Carefully follow all unit dimensional drawings and refer to the submittal engineering dimensional drawings of individual units for proper clearances 5 1 Installation Considerations The evaporator unit is usually mounted above the suspended ceiling using field supplied threaded rods Refer to Figures 9 10 and 11 for possible configurations The condensing unit may be Indoor Air Cooled Centrifugal Fan Condensing Unit mounted remotely or close coupled to the evaporator in the ceiling space Outdoor Air Cooled Propeller Fan Condensing Unit Indoor Water Glycol Cooled Condensing Unit mounted remotely or close coupled to the evaporator Table 3 Application limits evaporator and chilled water units Input Voltage Range of Return Air Conditions to Unit Minimum Maximum Dry Bulb Temp Relative Humidity o o 5 10 ee 290 20 to 80 Unit will operate at these conditions but will not control to these extremes Table 4 Application limits indoor and outdoor air cooled condensing units Entering Dry Bulb Input Voltage Air Temperature Minimum Maximum Condensing Units Min Max Outdoor Prop Fan Condensing Unit 30 F 34 C 115 F 46 C 5 10 o o Indoor Air Cooled Centrifugal Condensing Unit 20 F 29 119 46 C Table 5 Application limits indoor water glycol cooled condensing units Input Voltage Entering Fluid Temperature Minimum Maximum Minimum Maximum 5 10
65. fluid temperature sensor and supply return piping System includes an adjustable timed flush cycle Coil is active anytime there is a call for cooling and fluid temperature is 8 F 4 4 C below room air temperature The coil can provide the majority of the cooling with DX compressor coil cycled on as needed to complete the cooling requirements Air cooled condensing units can be matched with evaporators using free cooling coils with chilled water sources to serve as backup cooling When matched with a water glycol condensing unit a three way water regulating valve is recommended for the condensing unit to simplify piping to the main supply pipes The coil is designed for closed loop applications using properly treated and circulated fluid Not available with SCR reheat options Liebert Mini Mate2 10 Optional Factory Installed Features Evaporator Chilled Water Units Figure 8 A free cooling coil allows the system to take advantage of a primary chilled water Cooling source or colder water glycol J Coil temperatures available during colder outdoor temperatures The free cooling coil is used for cooling whenever fluid temperature is 8 F 4 4 C or more below room air temperature reducing the need Free cooling option example Drycooler Liebert Mini Mate2 Water Temperature Sensor for compressor operation 3 6
66. g 1 2 minimum ships with Filter Box diameter recommended typ 4 ye 16 13 16 54 1 8 Cabinet 427mm 1375mm Dimension 3 4 Threaded Rod lao Centers 12 1 8 15 518 308mm 397 ervice Access Panels 2 1 3 16 397mm 50 8mm 30 2mm 15 5 8 397mm 26 1 2 lt 673mm o b 9 16 14mm diameter 19 1 2 16 13 16 SS holes for threaded rods typ 2 each end 495mm y 2 typ Air Outlet Air Inlet Pa 4 25 4 50 1270mm 69 1 2 Cabinet 1765mm Dimension Hanger Bracket 72 48 3 4 1828 8mm 1238mm Threaded Rod 2 51 7 8 entere Centers Shaded area indicates a 1 1317 6mm recommended clearance 25 4mm 1 of 30 762mm for access and 497 filter removal 7 8 25 4mm 22 2mm 19 1 2 495 3mm 17 1 2 Shaded area indicates a 444 5 recommended clearance a amm of 30 762mm for access and Cum filter removal Duct Flange 1193 8mm DPN000240 Filter Box Optional Rev 4 25 4mm 203mm 29 Liebert Mini Mate2 Site Preparation and Installation 5 5 5 5 1 5 5 2 Indoor Air Cooled Centrifugal Fan Condensing Unit Installation NOTE Follow all national state and local building electrical and plumbing codes Location Considerations The centrifugal fan air cooled condensing unit may be located above the dropped ceiling or any remote indoor area If noise is of concern the condensing un
67. g See note 2 Wire connections from evaporator module 1 24V GND System 1 2 24V Supply System 1 3 High Pressure Alarm System 1 4 Hot Gas Bypass Connection System 1 5 24V GND System 2 6 24V Supply System 2 7 High Pressure Alarm System 2 Removable Access Panel 8 Hot Gas Bypass Connection System 2 Line Voltage Electric Power Supply Conduit Field Supplied 24V NEC Class 2 Wiring between Glycol Condensing Unit and Drycooler Connection Terminal for Field Supplied Earth Grounding Wire Remote Drycooler Connection Field supplied 24V NEC Class 2 wiring glycol cooled units only N Low Voltage Electric Power Supply Conduit Entrance NOTES 1 Refer to specification sheet for full load amp and wire size amp ratings DPNO000252 2 Control voltage wiring must be a minimum of 16GA 1 3mm for up to 75 23m or Rev 2 not to exceed 1 volt drop in control line Liebert Mini Mate2 40 Site Preparation and Installation Figure 29 System piping with indoor water glycol cooled condensing unit High Pressure Scroll Switch Compressor Tube in Tube KS Tube in Tube Condenser Condenser Liquid Injection Valve Bulb Suction Line Male Quick Fluid Connect Coupling Water Glycol Return Return Line From Unit Water Glycol Q Supply Li uid Supply luid Return Eee To Unit d Liquid Injection Valve From Unit egulating alve Optional Field Piping Shut off T m Liquid Lin
68. gree 90 Degree 45 Degree Gate Globe Angle OD in Elbow Copper Elbow Cast Elbow Tee Valve Valve Valve 1 2 0 8 0 24 1 3 0 39 0 4 0 12 2 5 0 76 0 26 0 07 7 0 2 13 4 0 1 21 5 8 0 9 0 27 1 4 0 42 0 5 0 15 2 5 0 76 0 28 0 08 9 5 2 89 5 0 1 52 3 4 1 0 0 3 1 5 0 45 0 6 0 18 2 5 0 76 0 3 0 09 12 0 3 65 6 5 1 98 7 8 1 45 0 44 1 8 0 54 0 8 0 24 3 6 1 09 0 36 0 1 17 2 5 24 9 5 2 89 1 1 8 1 85 0 56 2 2 0 67 1 0 0 3 4 6 1 4 0 48 0 14 22 5 6 85 12 0 3 65 1 3 8 2 4 0 73 2 9 0 88 1 3 0 39 6 4 1 95 0 65 0 19 32 0 9 75 16 0 4 87 1 5 8 2 9 0 88 3 5 1 06 1 6 0 48 7 2 2 19 0 72 0 21 36 0 10 97 19 5 5 94 Refrigerant trap Four times equivalent length of pipe per this table Liebert Mini Mate2 26 Site Preparation and Installation Figure 19 Refrigerant piping diagram Pitch down 1 2 per 10 feet Evaporator NOTE When installing remote condensing units below the evaporator the suction gas line should be trapped with an inverted trap to the height of the evaporator This prevents refrigerant migration to the compressors during off cycles Maximum recommended vertical drop to condensing Suction Line Piping unit is 20 feet 6 1 m Condensing Unit Below Evaporator Condensing Unit Condensing Unit Evaporator Suction Line Piping Condensing Unit Above Evapora
69. hes available utility power The Liebert microprocessor control does not isolate power from the unit even in the Unit Off mode Some internal components require and receive power even during the Unit Off mode The line side of the disconnect switch on the front of the unit contains live high voltage The only way to ensure that there is NO voltage inside the unit is to install and open a remote disconnect switch and check the internal power supply wires with a voltmeter Refer to unit electrical schematic Follow all applicable national state and local electric codes WARNING Risk of explosive discharge from high pressure refrigerant Can cause injury or death This unit contains fluids and gases under high pressure Relieve pressure before working with piping WARNING Risk of refrigerant system rupture or explosion from overpressurization Can cause equipment damage injury or death If a pressure relief device is not provided with the condenser unit the system installer must provide and install a discharge pressure relief valve per national state and local codes in the high side refrigerant circuit Do not install a shutoff valve between the compressor and the field installed relief valve Do not isolate any refrigerant circuits from overpressurization protection WARNING Risk of high speed moving parts Can cause injury or death Open all local and remote electrical power disconnect switches before working in the unit and component
70. ield supplied earth grounding wire Factory Installed Disconnect Switch Heat rejection connection Field supplied 24V NEC class 2 wiring see Note 2 Wire connections from evaporator module Low Voltage Electric Power 1 24V GND System 1 Supply Conduit Entrance 2 24V Supply System 1 3 High Pressure Alarm System 1 Openings for field supplied N 4 Hot Gas Bypass Connection System 1 24V NEC Class 2 wiring BY AN _ 5 24V GND System 2 between condensing unit and 6 24V Supply System 2 fan coil unit 7 High Pressure Alarm System 2 8 Hot Gas Bypass Connection System 2 9 24V GND Condenser Fan 10 24V SUPPLY Condenser Fan 4 101 6mm NOTES 1 Refer to specification sheet for full load amp and wire size ratings 2 Control voltage wiring must be a minimum of 16GA 1 3mm for up to 75 23m or not to exceed 1 volt drop in control line DPN000249 Rev 2 152 4mm 8 1 2 215 9mm 12 1 2 317 5mm 16 1 2 4191mm 5 5 3 Piping Connections Details for refrigerant R 407C loop piping are in 5 4 4 Piping Connections and Coolant Requirements 5 5 4 Ducting Fan operation is designed for 5000 CFM 8495 CMH at 0 5 external static pressure 31 Liebert Mini Mate2 Site Preparation and Installation General Considerations Use flexible duct work or nonflammable cloth collars to attach duct work to the unit and to control vibration transmission to the building Attach the duct work to the u
71. igeration system should be inspected for proper function and signs of wear Since in most cases evidence of malfunction is present prior to component failure periodic inspections can be a major factor in the prevention of most system failures Refrigerant lines must be properly supported and not allowed to vibrate against ceilings floors or the unit frame Inspect all refrigerant lines every six months for signs of wear and proper support Inspect the capillary and equalizer lines from the expansion valve Suction Pressure Suction pressure will vary with load conditions Suction pressure normally ranges from 58 psi to 75 psi 405 kPa to 517 kPa When the 3 ton circuit is operating alone the upper range of suction pressure may approach 100 psig This is a function of the unit design and is acceptable for scroll compressors Discharge Pressure The discharge pressure will vary greatly with load and ambient conditions Table 22 The high pressure switch will shut the compressor down at its cut out setting Table 22 Typical discharge pressures Discharge Pressure psig System Design kPa Air Cooled 200 300 1380 2070 Water Cooled 65 to 85 F water 18 to 29 4 C Glycol Cooled 250 350 1725 2415 High Pressure Cut Out 400 2760 200 250 1380 1725 Thermostatic Expansion Valve The thermostatic expansion valve keeps the evaporator supplied with enough refrigerant to satisfy load conditions Proper valv
72. important on units with Liebert Lee Temp receivers Compressor high head pressure Insufficient air flow across condenser coil Remove debris from coil and air inlets Water Glycol Cooled only No fluid flowing through condenser Check fluid supply to regulating valve Adjust valve if necessary Condenser fan not operating Check fan operation Humidifier does not operate DIP switch not set to enable humidifier option See DIP switch settings Table 23 HUMIDIFY not displayed at control panel Increase humidity control setpoint and sensitivity to require humidification Defective board Check voltage at 35 1 and 35 5 on interface board for 24 VAC 2 VAC If no voltage check wiring and or replace board Check wiring from control panel to board Failed humidity sensor Humidity display will indicate dashes Check wiring from temperature humidity board to the control board and from the wall box to the control board Replace wallbox or temperature humidity circuit board if remote No water flow Make sure switch is in Run position Check humidifier water supply including filter screen and check nylon overflow line if canister is full Canister fill rate is not keeping up with the steam output Check fill valve screen opening and capillary tube for obstructions Check water supply pressure minimum 10 psig 71 Liebert Mini Mate2 Troubleshooting
73. ing e g contactors reheats etc Are reheats drawing the proper current refer to amp rating on nameplate High and Low simultaneously The simultaneous display of these two alarms results in loss of the temperature input signal or the humidity is out of sensor range 15 to 8596 RH Dashes will be displayed for the temperature reading The control system will initiate 10096 cooling Check for a disconnected cable or a failed sensor Humidifier Problem Alarm The Humidifier Problem Alarm will sound and display a message if any of the following humidifier conditions occur overcurrent detection fill system fault or end of cylinder life Check fault indicator LED on humidifier control board Constant LED on Overcurrent 1 second LED Flash Fill System Fault 1 2 second LED Flash End of cylinder life replace tank High Water Alarm A float switch in the evaporator pan will shutdown the evaporator on a high water level Clear the drain and reset power to the unit in order to clear the alarm Loss of Power The Loss of Power Alarm will activate after power is restored to the unit if the unit has lost power or the disconnect switch was incorrectly turned off before the unit ON OFF switch was pressed A Liebert remote monitoring unit optional will immediately indicate loss of power Short Cycle A Short Cycle Alarm will occur if a compressor system has exceeded 10 cooling start attempts in a one hour period This can be c
74. ings power must be cycled Off then On from the unit disconnect switch Table 20 Equipment switch settings unit control board Switch OFF Position ON Position Step Cool Ramp Cool 2 Step Heat Ramp Heat 3 Not Used Not Used 4 No GLYCOOL GLYCOOL 5 Disable 1 stage CW Enable 1 stage CW 6 Not used Not used oe dehumidification dehumidification 8 Disable SCR Reheat Enable SCR Reheat Table 21 Switch settings wallbox board Switch OFF Position ON Position Beeper Disable Beeper Enable 2 Not Used Not Used 3 Not Used Not Used 4 Enable Reheat Disable Reheat 5 Enable Hum Disable Hum 6 Enable Dehum Disable Dehum 7 Disable Setback Enable Setback 8 Enable Password Disable Password 51 Liebert Mini Mate2 Microprocessor Control 6 18 Run Diagnostics By selecting RUN DIAGNOSTICS maintenance personnel can check system inputs outputs and conduct a test of the microcontroller circuit board from the wall box control A review of the system inputs and the microcontroller test can be done without interrupting normal operation Show Inputs With the unit On and the fan running the input states may be displayed for the following devices High Water Alarm Normally off unless High Water Alarm is active High Head Pressure Alarm Normally off unless High head Pressure alarm is active Custom alarm 1 Normally off unless this special customer selectable alarm
75. it Board 69 10 0 MAINTENANCE INSPECTION eee 70 11 0 TROUBLESHOOTING 71 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 FIGURES Model number nomenclature Evaporator 3 Model number nomenclature Air cooled indoor condensing units 4 Air cooled systems Outdoor prop fan condensing 4 Water glycol cooled systems Indoor condensing 5 Model number nomenclature Chilled water 6 Improved load tracking kk kk kk kk kk kk een kk kk kk hr 9 Wal ane ser ea werk ooo d ag UR KC NR b KK Np hes 9 Free cooling option example 11 System configurations air cooled 15 System configurations water glycol systems
76. it and supply lines and in the secondary drain pan Check drain lines periodically for leaks sediment buildup obstructions kinks and or damage and verify that they are free running NOTICE Risk of a leaking coil due to freezing and or corrosion Can cause equipment and building damage Cooling coils and piping systems that are connected to open cooling towers or other open water glycol systems are at high risk for freezing and premature corrosion Fluids in these systems must contain the proper antifreeze and inhibitors to prevent freezing and premature coil corrosion The water or water glycol solution must be analyzed by a competent water treatment specialist before startup to establish the inhibitor requirement The water or water glycol solution must be analyzed every six months to determine the pattern of inhibitor depletion The complexity of water caused problems and their correction makes it important to obtain the advice of a water treatment specialist and follow a regularly scheduled maintenance program NOTICE Risk of damage from forklift Can cause unit damage Keep tines of the forklift level and at a height suitable to fit below the skid and or unit to prevent damage NOTICE Risk of improper storage Can cause unit damage Keep the Liebert Mini Mate2 upright indoors and protected from dampness freezing temperatures and contact damage Liebert Mini Mate2 2 Model Number Nomenclature MODEL NUMBER NOMENCL
77. it should be located away from personnel Normal operating sound may be objectionable if the condensing unit is placed near quiet work areas mount the unit in the ceiling refer to 5 4 Installing the Ceiling Units for hanging guidelines and to Figure 23 for dimensional data Electrical Connections Condensing Unit Refer to 5 4 3 Electrical Connections Evaporator or Chilled Water Unit and Figure 21 for general wiring requirements and cautions Refer to electrical schematic when making connections Refer to unit serial tag for full load amp and wire size amp ratings Power Connections The condensing unit requires its own power source and earth ground with a disconnect switch to isolate the unit for maintenance NOTE Refer to serial tag for full load amp and wire size amp ratings Control Connections Field supplied control wires must be connected between the evaporator and the condensing unit See Figure 21 and the electrical schematic on the units for more details Ten 10 wires are required between the evaporator and condensing unit Liebert Mini Mate2 30 Site Preparation and Installation Figure 21 Indoor air cooled centrifugal condenser electrical connections Field Supplied Unit Disconnect Switch when factory unit disconnect switch is not supplied Electric Service not by Emerson Line Voltage Electric Power Supply Removable Conduit Access Panels Connection Terminal for f
78. may disturb the working environment Locate the evaporator unit over an unobstructed floor space if possible This will allow easy access for routine maintenance or service Do not attach additional devices to the exterior of the cabinet as they could interfere with maintenance or service NOTE Temperature and humidity sensors are located in the wall box Carefully select a position for the box where discharge air DOES NOT blow directly on the sensors Figure9 System configurations air cooled systems 5 Prop Fan Condensing Unit G R A Centrifugal Fan Condensing Unit 15 Liebert Mini Mate2 Site Preparation and Installation Figure 10 System configurations water glycol systems lt a Cooling Tower WATER COOLED SYSTEMS Evaporator Water Glycol Condensing Unit GLYCOL COOLED SYSTEMS Drycooler Water Glycol Condensing Unit Figure 11 System configurations chilled water systems lt Evaporator Liebert Mini Mate2 16 Site Preparation and Installation Figure 12 System configurations close coupled components gt Evaporator GF o Condensate Pump 5 2 Ceiling Unit Weights Table 6 Unit weights Unit Type Model Weight Ib kg Cooling Units MMD8TC 665 302 MMD96E 665 302 MMD95E 665 302 Condensing Units MCD96A 530 241 MCD95A 530 241 MCD98W 470 213 MCD97W 470 213
79. mended for proper circuit operation ZC Factory Piping and maintenance DPN000236 Rev 3 Water Glycol Piping Water cooled and glycol cooled systems require coolant loop connections as specified in the condensing unit installation instructions 25 Liebert Mini Mate2 Site Preparation and Installation Refrigerant R 407C Piping A WARNING Risk of explosive discharge of high pressure refrigerant Can cause serious injury Relieve refrigerant system pressure before working with piping connections All split systems require two sets of refrigerant lines two insulated copper suction lines and two copper liquid lines between the evaporator and the condensing unit Two possible methods exist for installing the copper suction and liquid lines Close coupling the units together using the quick connects see Figure 12 Using an optional Sweat Adapter Kit and hard piping between the two units All refrigeration piping should be installed with high temperature brazed joints Prevailing good refrigeration practices should be employed for piping supports leak testing evacuation dehydration and charging of the refrigeration circuits The refrigeration piping should be isolated from the building by the use of vibration isolating supports To prevent tube damage when sealing openings in walls and to reduce vibration transmission use a soft flexible material to pack around the tubes When installing remote condensing units abo
80. mounts belts fan bearings and impellers Fan impellers should be thoroughly inspected and any debris removed Check to see if they are tightly mounted on the fan shaft and do not rub against the fan housing during rotation Motor and fan bearings are permanently sealed and self lubricating and do NOT need lubricated The drive belt should be checked monthly for signs of wear and proper tension Pressing on belts midway between the sheave and pulley should produce from 1 2 to 1 12 to 25 mm of deflection Belts that are too tight can cause excessive bearing wear Belt tension can be adjusted by raising or lowering the fan motor base Loosen nut above motor mounting plate to remove belt Turn nut below motor mounting plate to adjust belt tension If belt appears cracked or worn it should be replaced with a matched belt identically sized With proper care a belt should last several years NOTE After adjusting or changing the belt always be certain that motor base nuts are tightened The bottom adjustment nut should be finger tight The top locking nut should be tightened with a wrench Air Distribution Since all unit models are designed for constant volume air delivery any unusual restrictions within the air circuit must be avoided High efficiency filters can reduce air performance and evaporator capacity Blower Removal Evaporator NOTICE Risk of refrigerant and water glycol piping damage Can cause leaks that result in e
81. n The hot gas bypass valve is installed between the compressor discharge piping and suction piping bypassing the condenser and evaporator coils The discharge gas mixes with the suction gas raising the suction temperature and pressure and decreasing the mass flow through the evaporator The higher suction temperatures could cause compressor overheating therefore a separate liquid quenching valve is provided to mix refrigerant from the system liquid line with the discharge gas before mixing with the suction gas entering the compressor During normal operation when the evaporator is under full load the hot gas bypass equalizer pressure will remain high enough to keep the valve port closed If the evaporator load decreases the evaporator temperature and pressure will drop When the suction pressure reduces below the hot gas bypass valve setting the hot gas bypass valve opens diverting some of the refrigerant flow back to the compressor suction The liquid quenching valve bulb senses this increased superheat and opens allowing liquid refrigerant to mix with the discharge gas desuperheating it Proper mixing of the three refrigerant paths ensures stable operation and system performance The liquid quenching valve bulb must be located downstream of all these connections to control superheat at the compressor inlet Superheat settings for the liquid quenching valve are chosen to maintain consistency with the system expansion valve During hot gas bypass
82. n the return air temperature and the temperature setpoint Unnecessary dehumidification can result when overcooling occurs during a dehumidification cycle This is due to a higher than normal RH reading caused by overcooling the room about 2 RH for each degree of overcooling This drop in temperature extends the dehumidification cycle Later when the dehumidification ends and the temperature rises to the setpoint the RH reading falls The final RH reading will then be lower than actually desired If the temperature drop was significant enough the percentage RH could be low enough to activate the humidifier If the absolute humidity control is selected over dehumidification may be avoided When overcooling occurs 1 causing an increase in the RH reading the humidity control program estimates what the RH will be when the dehumidification cycle ends and temperature returns to the setpoint This allows the dehumidification cycle to end at the proper time Predictive humidity control can greatly reduce energy consumption by minimizing both compressor reheat operation Use the UP or DOWN arrow key to select the desired humidity control method Lead Compressor This function allows the user to select which compressor is the lead Compressor 1 8 ton Compressor 2 5 ton or Auto The factory default is AUTO If AUTO is selected the control will determine which compressor is to be the lead compressor based on the average room load over the pre
83. ndoor and outdoor air cooled condensing units 14 Application limits indoor water glycol cooled condensing 14 etre eR e vb roe en tete teo 17 Evaporator external static pressure 60Hz at 3750 6871 CMH 20 Recommended refrigerant line sizes 26 Pipe length and condenser elevation relative to evaporator 26 Equivalent lengths for various pipe fittings ft 26 Unit refrigerant charges voe ertet heed rads a dba do e e o rage Rea A dr ede ee ue es BS 27 Line charges refrigerant per 100 ft 30m of Type L 27 Refrigerant quick connect sizes and 1 28 Dimensions and weight Prop Fan Condensing 36 Piping and electrical lesser as 37 Default setpoints and allowable ranges 2 0 s 46 Night and weekend setback plan KK KK KK KK KK KK KK KK KK KK KK k 47 Setup functions default values and allowable 49 Alarm detault time delays 2o PRAE es EES pe BE eget 50 Equipment switch settings unit control 51 Switch settings wallbox
84. nit using the flanges provided Locate the unit and duct work so that the discharge air does not short circuit to the return air inlet Duct work that runs through a conditioned space or is exposed to areas where condensation may occur must be insulated Duct work should be suspended using flexible hangers Duct work should not be fastened directly to the building structure For multiple unit installations space the units so that the hot condensing unit exhaust air is not directed toward the air inlet of an adjacent unit Considerations for Specific Applications In applications where the ceiling plenum is used as the heat rejection domain the discharge air must be directed away from the condensing unit air inlet and a screen must be added to the end of the discharge duct to protect service personnel Locate the air discharge a minimum of 4 feet from an adjacent wall Failure to do so may result in reduced air flow and poor system performance If the condensing unit draws air from the outside of the building rain hoods must be installed Hood intake dimensions should be the same as the condensing unit duct dimensions In addition install a triple layer bird screen over rain hood openings to eliminate the possibility of insects birds water or debris entering the unit Avoid directing the hot exhaust air toward adjacent doors or windows Figure 22 Piping connections indoor air cooled centrifugal fan condensing unit Condenser Coil Ho
85. ompressors will turn off at 75 and 25 requirements Chilled Water Cooling 8 Ton The chilled water control valve is adjusted proportionally as the temperature control varies the requirement for cooling from 0 to 100 This is based on the full valve travel time programmed in the Setup Operation menu GLYCOOL Cooling 8 Ton When GLYCOOL is available the temperature control will calculate a total cooling requirement of 200 Assuming that full GLYCOOL capacity is available the GLYCOOL valve opens proportionally as the requirement for cooling rises from 0 to 100 If the call for cooling continues to increase the control will energize the compressors as needed to match the average cooling requirement As long as GLYCOOL is available the control will leave the valve 100 open If GLYCOOL cooling is not available the temperature control will operate the compressors in the same manner as the Multi Step without GLYCOOL Liebert Mini Mate2 56 System Performance Microprocessor Controls 7 3 7 3 1 7 3 2 7 4 7 4 1 7 4 2 7 4 3 7 5 Reheat Electric Reheat Staged For 2 stage electric reheat they are activated when the temperature control calculates a requirement of 50 and 100 They are deactivated when the requirement decreases to 75 reheat 2 and 25 reheat 1 SCR Electric Reheat The SCR Silicon Controlled Rectifier controller shall proportionally control the stainless steel reheats to main
86. operation higher superheats 25 40 F 14 22 C may be observed at the compressor The liquid quenching valve is internally equalized and superheat is not adjustable 65 Liebert Mini Mate2 System Operation Testing and Maintenance 9 3 9 3 1 Adjustment 1 Install the suction and discharge pressure gauge 2 Adjust temperature setpoint to call for cooling so that the refrigeration compressor will run continuously 3 Remove the TOP adjusting nut from the valve 4 Insert an Allen wrench in the brass hole at top of valve in adjusting port and turn CLOCKWISE if a higher evaporator temperature is required Adjust no more than 1 4 turn at a time Let the system stabilize for 15 minutes before determining if additional adjustment is necessary 5 After obtaining the suction pressure required reinstall cap tightly making sure there are no leaks 6 Let the evaporator operate for approximately 10 to 15 minutes to make sure the suction pressure is within the range desired 7 There may be a fluctuation of approximately 3 to 6 psig 21 to 41 kPa on the evaporator due to the differential on the hot gas bypass 8 Return temperature setpoint to the desired setting Replacement Procedures Compressor Replacement Infrequently a fault in the motor insulation may result in a motor burnout if system is properly installed motor burnout rarely occurs Primarily this type of failure is due to mechanical or lubrication problems
87. ormally 2 Ifthe conductivity of the water is low the canister fills and the water level reaches the canister full electrode before the amperage setpoint is reached The humidifier stops filling to prevent overflow Boiling should commence in time As water is boiled off the mineral concentration in the canister increases and current flow also increases The canister eventually reaches full output and goes to normal operation No drain 15 permitted until then 3 When full output is reached the circuit board starts a time cycle which 18 factory set at 60 seconds During this repeating time cycle the fill valve will open periodically to replenish the water being boiled off and maintain a steady state output at the setpoint The amperage variance will depend on the conductivity of the water 4 After a period of time the mineral concentration in the canister becomes too high When this occurs the water boils too quickly As the water quickly boils off and less of the electrode is exposed the current flow decreases When the current crosses the low threshold point factory set at 8596 before the end of the time cycle the drain valve opens draining the mineral laden water out and replacing it with fresh water This lowers the mineral concentration and returns the canister to steady state operation and prolongs canister life The frequency of drains depends on water conductivity 5 Over a period of time the electrode surface will become coated with
88. pled hang each unit before connecting them together See Figure 14 If Single Point Power Kit is used install the box into the evaporator prior to suspending the units Route power wire flex conduit into condensing unit as units are suspended Refer to instructions supplied with kit for details Align bolt holes in the condensing unit and in the evaporator Insert rubber spacers and secure four 4 sets of hardware provided Align the refrigerant connections and tighten them as described in 5 4 4 Piping Connections and Coolant Requirements Remove P clamps from piping to aid fitting alignment Figure 14 Close coupled installation Condensing Unit Evaporator Isolator Rubber 5 16 Lock Washer 5 16 Capscrew 5 16 Flat Washer NOTE Disconnect P clamps on lines in the evaporator for easy close coupling P clamps are for shipping purposes only 5 42 Evaporator Air Distribution Filter Box The optional filter box attaches directly to the return air opening of the evaporator The filter box is supplied with 1 25 4mm duct flange connection quantity two 20 x 25 x 4 nominal 508mm x 635mm x 102mm filters and a 1 25 4 mm duct flange for use on the supply air opening Filters are MERV 8 efficiency per ASHRAE Standard 52 2 2007 NOTE Do not operate the unit without filters installed in return air system 19 Liebert Mini Mate2 Site Preparation and Installation Connections for Ducted Systems
89. pleted Installation 10 11 12 13 14 15 16 17 18 19 20 21 Proper clearance for service access has been maintained around the equipment Equipment is level and lock nuts are installed with the leveling nuts on the spring isolators Piping completed to refrigerant or coolant loop if required Refrigerant charge added if required Condensate pump installed if required Drain line s connected and checked for leaks Water supply line connected to humidifier if required Route to allow air filter removal Field provided pan with drain installed under all cooling units and water glycol condensing units Filter box installed Ducting completed Filter s installed in return air duct Line voltage to power wiring matches equipment serial tag Power wiring connections completed and phased correctly between disconnect switch evaporator and condensing unit including earth ground Power line circuit breakers or fuses have proper ratings for equipment installed Control wiring connections completed to evaporator and condensing unit if required including wiring to wall mounted control panel and optional controls Control panel DIP switches set based on customer requirements All wiring connections are tight Foreign materials have been removed from in and around all equipment installed shipping materials construction materials tools etc Fans and blowers rotate freely without
90. quipment and building damage and loss of cooling Use caution and do not contact piping when removing the blower motor and blower sled If the blower or bearings must be removed or serviced use the following procedure 1 Prepare the main center section of the three 3 piece electric panel by first marking and disconnecting all power and control wiring entering the panel Remove the electric panel by removing screws from top and bottom sections Remove the bottom electric panel mounting flange from unit base Remove the belt motor motor mounting plate and tensioning bolt Remove the four 4 screws holding the blower mounting rails to the sled Remove the 4 screws holding the blower mounting rails to the sled Slide the blower rail assembly forward and rotate approximately 45 degrees and remove from unit 8 Replace failed parts NDT 63 Liebert Mini Mate2 System Operation Testing and Maintenance 9 2 4 9 2 5 Electric Reheat Reheat element sheets and fins are manufactured with stainless steel Regular inspections are necessary to assure proper cleanliness of the reheating element Should inspection reveal corrosion particles on the reheating element or adjoining surfaces including ducts and plenums appropriate cleaning should be performed Periodic replacement of the reheating element may be necessary to meet specific application requirements Refrigeration System Each month the components of the refr
91. rator and MCD condensing unit Remote Monitoring Autochangeover and Leak Detection Equipment The Liebert 4 isa four point normally open dry contact monitoring panel One Form C dry contact common alarm relay output rated at 24 VAC 3 Amp is provided Four red LEDs illuminate on the respective alarm and the alarm buzzer is silenced by a front panel switch The RCM4 requires a 24VAC or 24VDC power source Power supply is not included The Liebert AC4 Autochangeover Controller provides autochangeover and autosequence control for up to four Liebert Mini Mate2 units within a room The Liebert AC4 will enable redundant units in an alarm condition balance usage and test standby units at programmed intervals Two common alarm relay outputs are available A built in LCD and RS 232 port for direct PC terminal connection provides two options for configuration and monitoring of the product The Liebert AC4 requires 24VAC input power The Liebert is ideal for coordinated control of systems with redundant units The Liebert AC8 enables redundant devices during an alarm condition balances usage of devices and tests standby devices at programmable intervals Supports four zones and can use the 4 20mA temperature sensor TW420 for temperature staging in each zone Two programmable output control relays are available for auxiliary control such as humidity lockout Emergency power operation input provided for device control during an emergen
92. readed rods typ 2 each end entrance for high voltage Air connection Air Inlet Single Point Power Kit Connection from Evaporator System 1 3Ton Suction Line Connection Aeroquip 11 Male System 2 5Ton Suction Line Connection Aeroquip 12 Male System 1 3Ton Liquid Line Connection Aeroquip 6 Male System 2 5Ton Liquid Line Connection Aeroquip 10 Male 7 8 22 2mm dia electrical entrance 7 8 22 2mm dia knockout for low voltage connection electrical entrance for alternate DPN000248 control panel low voltage routing Rev 2 33 Liebert Mini Mate2 Site Preparation and Installation 5 6 5 6 1 5 6 2 5 6 3 Outdoor Air Cooled Condensing Unit Installation NOTE Follow all local state and national building electrical and plumbing codes Location Considerations ensure a satisfactory air supply locate air cooled propeller fan condensing units in an environment providing clean air away from loose dirt and foreign matter that may clog the coil Condensing units must not be located in the vicinity of steam hot air or fume exhausts or closer than 18 inches from a wall obstruction or adjacent unit Avoid areas where heavy snow will accumulate at air inlet and discharge locations The condensing unit should be located for maximum security and maintenance accessibility Avoid ground level sites with public access The condensing unit should be located within maximum distan
93. riate cleaning should be performed Periodic reheating element replacement may be required to meet specific application requirements MONTHLY Filters 1 Check for restricted airflow 2 Check for filter 3 Wipe section clean 1 Impellers free of debris and move freely 2 Bearings in good condition 3 Check belt tension and condition SEMIANNUALLY Compressor Section 1 Signs of oil leaks ___ 2 Vibration isolation Refrigeration Cycle 1 Suction pressure 2 Head pressure 3 Superheat 4 Evaporator coil clean 5 Insulation intact Air Cooled Condensing Unit if applicable ___ 1 Condenser coil clean 2 Motor mount tight 3 Refrigerant lines properly supported Signature Humidifier 1 Check canister for mineral deposits 2 Check condition of electrodes 3 All hoses and fittings tight 4 Check water make up valve for leaks 1 Check for obstructions and sediment buildup 2 Check for damage and or corrosion 3 Check for leaks Flood Back Head Pressure Control 1 Check refrigerant level Water or Glycol Cooled Condensing Unit 1 Water valve adjustment 2 Water flow 8 Water leaks Glycol Pump if applicable 1 Glycol leaks 2 Pump operation 3 Glycol solution 4 pH level Electric Panel 1 Check electrical connections 2 Operational sequence Electric Reheat 1 Check element for corrosion Make photocopies of this form for your records Liebert Mini Mate2
94. rt Mini Mate2 64 System Operation Testing and Maintenance Regulating Valves Water Glycol Condensing Units The water regulating valve automatically regulate the amount of fluid necessary to remove the heat from the refrigeration system permitting more fluid to flow when load conditions are high and less fluid to flow when load conditions are low The water regulating valve is designed to begin opening at 180 psi 1240 kPa and be fully opened at 240 psi 1655 kPa The valve is factory set and should not need adjustment Glycol Solution Maintenance It is difficult to establish a specific schedule of inhibitor maintenance since the rate of inhibitor depletion depends upon local water conditions Analysis of water samples at time of installation and every six 6 months should help to establish a pattern of depletion A visual inspection of the solution and filter residue is often helpful in judging whether or not active corrosion is occurring The complexity of problems caused by water requires expert advice from a water treatment specialist plus a regular maintenance program schedule It is important to note that improper use of water treatment chemicals can cause severe problems Proper inhibitor maintenance must be performed in order to prevent corrosion of the glycol system Consult your glycol manufacturer for proper testing and maintenance procedures Do not mix products from different manufacturers Hot Gas Bypass Operatio
95. se the UP and DOWN arrows to change the first character press ENTER to store then press the UP or DOWN arrows to change the character press Enter to store etc THERE IS A BATTERY BACKUP FOR THE DATE AND TIME FEATURES Date The controller date must be set to allow for setback control To change the date press ENTER then use the UP and DOWN arrows to change the first character press ENTER to store press the UP and DOWN arrows to change the second character etc Liebert Mini Mate2 46 Microprocessor Control 6 9 Setback The microprocessor can be programmed for night and weekend setback Two 2 events can be programmed for a five day work week and two 2 events can be programmed for a two day weekend The following table can be used to devise a setback plan Table 17 Night and weekend setback plan Event Weekend Weekday Time 1 Temperature1 Sensitivity 1 Humidity 1 Humidity Sensitivity 1 Time 2 Temperature 2 Sensitivity 2 Humidity 2 Humidity Sensitivity 2 6 10 Setup Operation Selecting SETPOINT SETUP from the MAIN MENU will display the following selections RESTART TIME DELAY DEGREES HUMIDITY CONTROL METHOD SHOW DIPSWITCH CW FLUSH VALVE TIME Use the UP and DOWN arrows to scroll through the submenu Press ENTER to select a particular function 6 10 1 Restart Time Delay This function delays unit restart after main power is restored
96. setpoint to the desired temperature Humidification To check humidification set the humidity setpoint at RH 10 above the room humidity reading After a short delay the canister will fill with water and steam will be produced Upon completion of testing return the humidity setpoint to the desired humidity Dehumidification The dehumidification performance can be tested by setting the humidity setpoint at RH 10 below room relative humidity The compressor should turn on Upon completion of testing return humidity setpoint to the desired humidity Remote Shutdown A connection point is provided for remote shutdown devices supplied by the customer This terminal strip is located in the electric panel Terminals 37 and 38 are fitted with a jumper when no remote shutdown device is installed Liebert Mini Mate2 62 System Operation Testing and Maintenance 9 2 9 2 1 9 2 2 9 2 3 Maintenance and Component Operation Electric Panel The electric panel should be inspected on a semi annual basis for any loose electrical connections Filters Filters are usually the most neglected item in an environmental control system In order to maintain efficient operation they should be checked monthly and changed as required ALWAYS TURN POWER OFF BEFORE REPLACING FILTERS Filters are replaced by opening the hinged door on the return air filter box Blower System Monthly inspection of the blower package includes motor
97. ssor Control and a time delay of 0 255 seconds can be set The alarms can also be programmed to either sound the alarm amp activate the common alarm relay OR to sound the alarm only When a new alarm occurs it is displayed on the screen and the audible alarm is activated If communicating with a Liebert Site Product the alarm is also transmitted The message PRESS ALARM SILENCE will prompt the operator to silence the alarm After the alarm is silenced the display will return to the Normal Status Display Alarms can be reviewed by selecting the ACTIVE ALARMS feature The alarms can also be silenced through communications with a Liebert Site Products Unit Many alarms will reset automatically when the alarm condition is no longer present and only after it has been acknowledged by being Silenced The exceptions are 1 Software alarms i e Loss of Power and Short Cycle alarms will reset automatically 30 seconds and 90 minutes respectively after being silenced or acknowledged and 2 Specific alarms monitoring overload or high pressure switches may require a manual reset depending upon the model Alarms Definitions and Troubleshooting The following list provides a definition and troubleshooting suggestions for each type of alarm Refer to 11 0 Troubleshooting for additional details If you need further assistance contact your Liebert supplier THE CUSTOMER MUST SPECIFY ALARM S AT THE TIME OF ORDER OTHER DEVICES AND W
98. sting and Maintenance 9 3 2 Steam Generating Humidifier Operation Procedures Steam generating humidifiers operate efficiently over a wide range of water quality conditions and automatically adjust to changes in the conductivity of water The system will automatically drain and refill to maintain a current setpoint and alert the operator when the humidifier canister needs to be replaced The humidifier RUN DRAIN switch is located in the humidifier assembly This switch should be in the RUN position when the humidifier is in normal operation and in the DRAIN position during service The electronic control board for the humidifier 15 also located in the humidifier assembly When the unit is energized power is available to humidifier Operation involves the following steps 1 During start up when the humidity control calls for humidification the fill valve will open allowing water to enter the canister When the water level reaches the electrodes current flows and the water will begin to warm The canister fills until the amperage reaches the setpoint and the fill valve closes As the water warms its conductivity increases and the current flow in turn rises If the amperage reaches 115 of the normal operating amperage the drain valve opens and flushes some of the water out of the canister This reduces electrode contact with the water and lowers the current flow to the amperage setpoint Boiling soon commences and the canister operates n
99. sure units Refer to unit serial tag and model number description page at beginning of this manual NOTE HVAC grade ethylene or propylene glycol should be used on glycol systems Automotive antifreeze must not be used Regulating Valve Water Glycol cooled units include a coolant flow regulating valve which is factory adjusted and should not need field adjustment Standard water pressure and high water pressure valves are adjusted differently Contact Liebert Service before making any adjustments Liebert Mini Mate2 38 Site Preparation and Installation Figure 27 Indoor water glycol condensing unit dimensions 32 54 813mm 1372mm Cabinet Cabinet Dimension Customer supplied threaded Dimension rods for module support from ceiling 1 2 diameter minimum recommended typ 4 660mm Cabinet Dimension Shaded area indicates a recommended clearance of 30 762mm for component access and removal 9 16 14mm dia hole for module rigging typ 2 each end 50 3 4 1289mm Threaded Rod Threaded Rod cao H anger Bracket Centers N Centers NOTE Unit is evenly spaced reference See Detail 4 1 8 29mm dia knockout electrical Single Point Power Kit entrance for line voltage connection Connection from Evaporator 7 8 22mm dia knockout electrical 1 3 8 34 9mm OD Cu entrance for line voltage
100. t Gas Bypass Control Liquid Injection Valve Bulb 3 8 SAE 45 Male Flare MCD or Atmospheric PFH Pressure Relief Valve Connect Coupling Suction Line Female Quick Connect Coupling 3 S Sensing Bulb 2 S e External Equalizer gt ee X A Liquid Injection Ye Valve Valve DPNO000236 Rev 3 Service Access Receiver Ports lt 2 2 Liquid Line Male Quick Receiver Heater Pressure Balancing oo Connect Coupling Pressure Limiting Valve Liauid Li Switch A iquid Line Female Quick Connect Couplin Filter pang z Drier Expansion Evaporator Coil Liebert Mini Mate2 32 Site Preparation and Installation Figure 23 Indoor air cooled centrifugal condensing unit dimensions and pipe connections 40 5 32 66 9 32 1020mm 1683 5mm isi Cabinet Dimension Customer supplied Dimension 1 13 16 threaded rods for module 40mm support from ceiling 1 2 19 1 32 59 13 16 483mm M minimum diameter recommended typ 4 224mm 1 3 32 13 16 26mm 21mm 16 5 16 414mm 23 7 8 26 3 8 606mm 670mm Shaded area indicates a recommended clearance of 42 17 32 a 30 762mm for component 1080 3mm 62 1 2 access and removal Threaded Rog nci H Centers Bin 7 8 22mm and NOTE Unit is spaced evenly in a 1 1 8 20mm reference to threaded 9 16 14mm dia holes for dia knockouts electrical rod centers th
101. ta aera le Rb RUE toe enc teo yaya Ree Sle l esa Rams 57 Dehumidification Humidification Percent Required 57 7 4 1 Staged Dehumidification Compressorized Direct Expansion DX Systems 57 1 42 Humidification Operation cece s 57 7 4 3 Dehumidification Lockout ce KK KK KK s 57 Load Control Features i s cee al el re 57 Gomm nication san eee ir Gel C ep wg pU reta td aet 58 XE eg eee 59 Alarms Definitions and Troubleshooting 0 0 0000 eA 59 Su p Custom Alarms ccs eias ees pete Gre tat tee rena di eod a ty al Meteo de 59 81 2 High Head Pr ssure uuo reete Wat Aone xu ek eee SI N N was 59 8769 Humidity ei WE ENE e e 60 9 14 Tempera qui see toO PR vae er CRURA EY NN tol orate etu 60 8 1 5 Humidifier Problem Alarm 60 8 16 High Water Alarm H ya e HEWE RR Bil Sone Rer e ah we May Se peeled ran e gn 60 8 1 7 POWER iia erre d E eese re eec ree e me cie e 60 Short Cycles vote ade Ba e PNG ar a e S NM ORT pet HHH e 60 Optional Custom Alarms lee RR e e s 61 9 2 p Chance Falters ciate s irse Ape S 61 8 2 2 High Temperature
102. tain the selected room temperature The rapid cycling made possible by the SCR controller provides precise temperature control and the more constant element temperature extends heater life During operation of the SCR control the compressor s operate s continuously The heaters are modulated to provide temperature control If overcooling occurs the compressor s will be locked off when the temperature drops to the low temperature alarm SCR reheats are 15 kW closely matching 5 Ton capacity Unit control will choose and run continuously the correct combinations of compressors 5T 3T or both to offset room load The SCR Reheat is modulated to precisely maintain room temperature with output typically between 10 to 85 of full output Dehumidification Humidification Percent Required The humidity control for the MM2 is based on a calculated percent requirement for dehumidification or humidification The percent requirement is calculated from the difference between the sensor reading and the humidity setpoint divided by the sensitivity The control method is selectable between relative and absolute Relative humidity control is the default Staged Dehumidification Compressorized Direct Expansion DX Systems For the 8 ton unit operation 1 or 2 stage dehumidification is selected through DIP switch 7 For 2 stages the 5 ton compressor is the lead compressor when dehumidifying Dehumidification will be staged on at 50 and 100 call The electric
103. te all piping and evacuate lines before connecting quick connects Be especially careful when connecting the quick connect fittings Read through the following steps before making the connections 1 Remove protector caps and plugs Carefully wipe coupling seats and threaded surfaces with a clean cloth Lubricate the male diaphragm and synthetic rubber seal with refrigerant oil Thread the coupling halves together by hand to ensure that the threads mate properly Tighten the coupling body hex nut and union nut with the proper size wrench until the coupling bodies bottom out or until a definite resistance is felt Using a marker or pen make a line lengthwise from the coupling union nut to the bulkhead 7 Tighten the nuts an additional quarter turn the misalignment of the lines shows how much the coupling has been tightened This final quarter turn is necessary to ensure that the joint will not leak Refer to Table 13 for torque requirements Table 13 Refrigerant quick connect sizes and torque QU M OBS 9 Size Coupling Torque O D Cu Size lb ft Nm 3 8 6 10 12 13 6 16 43 1 2 10 35 45 47 5 61 7 8 11 35 45 47 5 61 1 1 8 12 50 65 67 8 88 1 Liebert Mini Mate2 28 Site Preparation and Installation Figure 20 Evaporator or chilled water unit dimensions Customer Supplied Optional 1 25 4mm threaded rods for module Discharge Duct Connection support from ceilin
104. the frequency of drain cycles Lowering the value decreases the frequency of drain cycles The frequency should be increased for highly conductive water and decreased for less conductive water If adjustment is necessary and a change of three to four percent in either direction does not permit normal operation of the unit consult your Liebert supplier The controls the duration of the drain cycle This adjustment is factory set at 60 seconds 1 VDC and should not be readjusted without consulting your Liebert supplier The DIP switch settings are used to set the capacity of the humidifier If the humidifier is replaced in the field the DIP switches should be set to the required settings described below Table 23 Humidifier control board DIP switch settings Voltage SW1 SW2 SW3 SW4 Amps 208 On On On Of 89 240 Off On On Off 8 5 380 415 Off Off Off Off 5 2 460 On On On Off 4 5 575 On On Off Off 3 4 69 Liebert Mini Mate2 Maintenance Inspection Checklist 10 0 MAINTENANCE INSPECTION CHECKLIST Liebert Mini Mate2 Date Model Prepared By Serial Number NOTE Q Reheat element sheaths and fins are manufactured with stainless steel Regular inspections are necessary to assure proper cleanliness of the reheating element Should inspection reveal corrosion particles on the reheating element or adjoining surfaces including ducts and plenums approp
105. tion Considerations The condensing unit may be located above the dropped ceiling or any remote indoor area If noise is of concern the condensing unit should be located away from personnel Normal operating sound may be objectionable if the condensing unit is placed near quiet work areas To mount the unit in the ceiling refer to 5 4 Installing the Ceiling Units 5 7 2 Electrical Connections Refer to 5 4 3 Electrical Connections Evaporator or Chilled Water Unit for general wiring requirements and cautions Refer to electrical schematic when making connections Refer to serial tag for full load amp and wire size amp ratings Control Connections An eight wire control connection is required from the evaporator unit to the water glycol condensing unit Glycol cooled units also require a two wire control connection to the drycooler pump control panel 37 Liebert Mini Mate2 Site Preparation and Installation 5 7 3 Piping Connections Details for Refrigerant R 407C Loop piping are in 5 4 4 Piping Connections and Coolant Requirements Water Glycol Piping Considerations Refer to Figure 29 for recommended field installed piping hardware such as shut off valves and hose bibs Water filters should be installed if water quality is poor Filters will extend the service life and efficiency of the condensers Condensing Unit Fluid Requirements The maximum fluid pressure is 150 psi standard pressure or 350 psi for high pres
106. to the unit If several systems are operating the time delays should be set to different values to cause a sequential start Delay can be set from 0 1 minutes to 9 9 minutes 6 seconds to 594 seconds Setting the value to zero 0 will prevent the unit from restarting when power is restored In this case the unit must be restarted manually by pressing the ON OFF button on the keypad 6 10 2 C F Degrees The control may be selected to show readings and setpoints in either degrees Fahrenheit F or Celsius C To change the value use ENTER to select this function then use the UP and DOWN arrows to change the value Press ENTER to store the value 47 Liebert Mini Mate2 Microprocessor Control 6 10 3 6 10 4 6 10 5 6 10 6 6 10 7 Humidity Control Method The operator may select either relative direct or absolute predictive humidity control If relative is selected the RH control is taken directly from the RH sensor If absolute is selected the RH control is automatically adjusted whenever return air temperature deviates from the desired temperature setpoint i e predictive humidity control The LCD will indicate percentage relative humidity for both methods of control If the absolute feature is selected the adjusted humidity reading will also be shown When utilizing the predictive humidity control feature the humidity level is automatically adjusted 2 RH for each degree difference betwee
107. tor Traps recommended every 25 feet 7 6 m of vertical rise Refrigerant Charge Requirements Total refrigerant charge R 407C will be required only if units are evacuated during installation or maintenance For safe and effective operation refer to 5 4 4 Piping Connections and Coolant Requirements NOTE If field supplied refrigerant piping is installed refrigerant R 407C must be added to the system Total refrigerant Units and Lines Table 11 Unit refrigerant charge Model R 407C oz kg 60Hz 50Hz 3 Ton Circuit 5 Ton Circuit MM 96E 95 7 0 20 7 0 20 MM 96K MM 95K 7 0 20 7 0 20 MC 96A MC 95A 210 6 0 402 11 4 PFHO96A PFHO95A 361 10 2 581 16 5 MC 98W MC 97W 54 1 5 94 2 7 All evaporator units and condensing units are fully factory charged with refrigerant If field supplied refrigerant piping is installed refrigerant charge must be added refer to Table 12 to determine the additional charge Table 12 Line charges refrigerant per 100 ft 30m of L copper tube Line Size R 407C 1b 100 ft kg 30m O D in Liquid Line Suction Line 3 8 3 7 1 7 1 2 6 9 3 1 5 8 11 0 5 0 0 4 0 2 3 4 15 7 7 1 0 6 0 3 7 8 23 0 10 4 1 0 0 4 1 1 8 1 7 0 7 1 3 8 2 7 1 1 27 Liebert Mini Mate2 Site Preparation and Installation Quick Connect Fittings NOTE When hard piping is used comple
108. unusual noise Inspect all piping connections for leaks during initial operations Correct as needed Drain pan is installed under cooling and ceiling mounted condensing unit Rubber band is removed from evaporator condensate pan float switch 43 Liebert Mini Mate2 Microprocessor Control 6 0 MICROPROCESSOR CONTROL 6 1 The Microprocessor Control for the Liebert Mini Mate2 unit features an easy to use menu driven LCD display The menus control features and circuit board details are described in this section Detailed information concerning controls 7 0 System Performance Microprocessor Controls and alarms 8 0 Alarms are provided Feature Overview To turn the unit ON press the ON OFF I O key after power is applied To turn the unit OFF press the ON OFF I O key before power is disconnected The following control keys may be used to move through the menus as prompted on the LCD display T O turns unit On or Off top far left MENU Enables user to access the program menu to change control parameters alarms setback schedule etc top near left UP ARROW Increases the value of displayed parameter while in a set mode setpoints time etc top near right ESC Escape allows user to move back to a previous menu top far right Alarm Silence Help If an alarm is present pressing this key will silence the alarm If this key is pressed when no alarms are present help text will
109. ure and humidity control and accurate alarm setpoints Using touch sensitive buttons the wall mounted monitor control panel allows you to display temperature and other monitored parameters High Efficiency High system efficiency is a result of high sensible heat ratio two selectable fan speeds and precise microprocessor control Space Saving Design All indoor components are installed above the ceiling so no floor space is required Reliable The Liebert Mini Mate2 family installed base is a testimony to the system s reliability Components include a rugged compressor high efficiency copper tube aluminum fin evaporator coil and a double inlet direct drive fan Agency Listed Standard 60Hz units are CSA certified to the harmonized U S and Canadian product safety standard CSA C22 2 No 236 UL1996 for Heating and Cooling Equipment and are marked with the CSA c us logo C US Location When considering installation locations consider that these units contain water and that water leaks can cause damage to sensitive equipment below Do not mount these units above sensitive equipment A field supplied pan with drain must be supplied beneath cooling units and water glycol condensers Do not install units where normal unit operating sound may disturb the working environment 7 Liebert Mini Mate2 Standard Features 8 Ton Systems 2 0 STANDARD FEATURES 8 TON SYSTEMS 2 1 2 2 2 2 1 2 2 2 2 2 3 2
110. ve Type D 2 Way Modulating Chilled Water Valve T 3 Way Modulating Chilled Water Valve C A H E L A Supply Power A 460V 3ph 60Hz B 575V 3ph 60Hz C 208V 3ph 60Hz D 230V 3ph 60Hz M 380 415V 3ph 50Hz Humidification H 0 R J Canister Humidifier No Humidifier Remote Humidifier Contact Canister Humidifier and Remote Humidifier Contact Reheat Type 0 No Reheat E Electric Reheat H Hot Water Reheat Blower Type L Low Static Blower 2hp motor H High Static Blower 3hp motor Sensor Packages 0 None Filter Clog B Smoke Sensor C High Temperature Sensor D Filter Clog amp Smoke Sensor E Filter Clog amp High Temperature Sensor F Smoke Sensor amp High Temperature Sensor G Filter Clog Smoke Sensor amp High Temperature Sensor Table 1 System configurations 60Hz Condensing Unit Nominal Cooling Indoor Air Cooled Outdoor Air Cooled Indoor Capacity Unit Centrifugal Fan Propeller Fan Water Glycol 8 Tons MMD96E MCD96A PFHO96A MCD98W 8 Tons MMD8TC Self Contained Chilled Water Table 2 System configurations 50Hz Condensing Unit Nominal Cooling Indoor Air Cooled Outdoor Air Cooled Indoor Remote Capacity Unit Centrifugal Fan Propeller Fan Water Glycol Cooled DER MMD95E MCD95A PFH095A MCD97W MMD8TC Self Contained Chilled Water Liebert Mini Mate2 Introduction 1 0 INTRODUCTION 1
111. ve the evaporator the suction gas lines should be trapped at the evaporator These traps will retain refrigerant oil in the off cycle When the unit starts oil in the traps is carried up the vertical risers and returns to the compressors Table 8 Recommended refrigerant line sizes 3 Ton 5 Ton Equivalent Length ft m Suction Liquid Suction Liquid 50 15 2 7 8 1 2 1 1 8 1 2 100 30 5 1 1 8 2 1 2 1 1 8 5 8 150 45 7 1 1 8 2 1 2 1 3 8 5 8 1 Suction and liquid line sizing based on lt 3 psi pressure drop in each minimum horizontal suction line velocity gt 700 3 6m s 2 Suction sizes marked with should be reduced one pipe size for vertical riser sections to maintain suction line velocity gt 1000 5 1m s for proper oil return Table 9 Pipe length and condenser elevation relative to evaporator Nominal System Max Equiv Pipe Max PFH Level Max PFH Level Size Tons Length ft m Above Evaporator ft m Below Evaporator ft m 150 45 50 15 15 4 6 Maximum recommended total equivalent pipe length is 150 ft 46m Suction and liquid lines may require additional specialty items when vertical lines exceed 20ft 6m and or condensing unit installation is more than 15 ft 4 6m below the evaporator Contact Emerson Application Engineering for assistance Table 10 Equivalent lengths for various pipe fittings ft m Copper Pipe 90 De
112. vious one hour of operation Show DIP Switch This function shows the position of the DIP switches which are located on the control board in the unit 1 Switch is ON and 0 Switch is OFF For more information on the DIP switches and their functions see Table 20 Valve Time This function shows the full valve travel time of the modulating valve on a chilled water system This is the time it takes for the valve to travel from fully closed to fully open It is programmable from 50 to 250 seconds factory default time is 165 seconds and should not be changed The full valve travel time is used by the control to determine the appropriate valve position For example if the valve travel time is 165 seconds and 50 cooling is being called for the valve will open for 83 seconds to achieve 50 open CW Flush This function shows the interval time at which the system will perform a modulating chilled water valve system flush cycle The factory default is 24 hours and is programmable from 0 hours which signifies to never flush to 99 hours which signifies to flush after every 99 hours of valve non use If the valve is called on by the control to open within the programmed interval time the timer will be reset to 0 The flush cycle is active even when the fan is turned off but power is applied to the unit When the interval timer reaches the programmed time the valve will be opened for 3 minutes to flush any contaminants that may hav
113. vity 2 0 F 1 9 9 F 0 6 5 6 C Humidity Setpoint 50 20 80 RH Humidity Sensitivity 5 1 30 RH High Temperature Alarm 80 F 35 95 F 2 35 C Low Temperature Alarm 65 F 35 95 F 2 35 C High Humidity Alarm 60 15 85 RH Low Humidity Alarm 40 15 85 RH Status The operator can monitor the percentage heating cooling dehumidifying and humidifying status of the unit by selecting the STATUS submenu Active Alarms The operator can monitor the alarms status by selecting ALARMS which will display ALARM PRESENT or Alarm XX of YY alert and description If more than one alarm is activated use the UP or DOWN arrow to scroll through the alarms list XX reference is the number of the alarm shown while the YY reference is the total number of alarms activated Alarm History A history of the 10 most recent alarms is kept in non volatile memory complete with the date and time of their occurrence The first alarm in the history is the most recent and the 10th is the oldest If the ALARM HISTORY is full 10 alarms and a new alarm occurs the oldest is lost and the newest is saved in ALARM HISTORY location 1 The rest are moved down the list by 1 ALARM HISTORY on new units may show the results of factory testing Time The controller time clock must be set to allow for the setback control The clock uses the 24 hour system i e midnight is entered as 24 00 To change the time press ENTER to select the function then u
114. where the burnout is a secondary consequence Early detection can prevent a large percentage of the problems that can cause compressor failures Periodic maintenance inspections by alert service personnel i e identification of abnormal operation can be a major factor in reducing maintenance costs It is easier and more cost effective to implement the necessary preventative steps that ensure proper system operation rather than 1gnore a problem until it results in compressor failure and costly replacement When troubleshooting a compressor problem check all electrical components for proper operation A WARNING Risk of explosive discharge from high pressure refrigerant Can cause injury or death This unit contains fluids and gases under high pressure Relieve pressure before working with piping Recover refrigerant per national state and local codes A CAUTION Risk of contacting caustic substances Can cause injury Do not touch or contact the gas or oils with exposed skin Severe burns will result Wear protective clothing safety goggles and long rubber gloves when handling contaminated parts Check all fuses and circuit breakers Check pressure switch operation If a compressor failure has occurred determine whether its cause is an electrical or mechanical problem Mechanical Failure If you have determined that a mechanical failure has occurred the compressor must be replaced If a burnout occurs correct the problem an
115. x 4 AM 24 J y y 9 Liebert Mini Mate2 Optional Factory Installed Features Evaporator Chilled Water Units 3 0 OPTIONAL FACTORY INSTALLED FEATURES EVAPORATOR CHILLED WATER UNITS 3 1 3 2 3 3 3 4 3 5 Reheat Electric reheat includes 2 stage 304 304 stainless steel finned tubular reheat elements for added durability Also includes high limit safety switch SCR Reheat provides tight temperature control by rapidly pulsing the 304 304 stainless steel reheat elements in small increments A solid state relay is factory installed and wired to the microprocessor control The compressor is locked on with the reheat modulated to track the load Not available on chilled water GLYCOOL free cooling or 575V units Hot Water Reheat includes a hot water coil two way solenoid valve and Y strainer This option is available only on chilled water units not available with other reheat options Humidifier The Canister Humidifier includes a steam generating type humidifier with automatic flushing circuit inlet strainer drain 1 25 4mm air gap on fill line and solenoid valves Humidifier problem alarm annunciates at the wall mounted display panel Remote Humidifier Contact allows the unit s humidity controller to control a humidifier outside the unit Power to operate the external humidifier does not come from the Liebert Mini Mate2 Available on units with or without internal humidifier Sensors
116. y from grid to chip for telecommunication networks data centers health care and industrial facilities Emerson Network Power provides innovative solutions and expertise in areas including AC and DC power and precision cooling systems embedded computing and power integrated racks and enclosures power switching and controls infrastructure management and connectivity All solutions are supported globally by local Emerson Network Power service technicians Liebert AC power precision cooling and monitoring products and services from Emerson Network Power deliver Efficiency Without Compromise by helping customers optimize their data center infrastructure to reduce costs and deliver high availability While every precaution has been taken to ensure the accuracy and completeness of this literature Liebert Corporation assumes no responsibility and disclaims all liability for damages resulting from use of this information or for any errors or omissions 2009 Liebert Corporation All rights reserved throughout the world Specifications subject to change without notice Liebert is a registered trademark of Liebert Corporation All names referred to are trademarks or registered trademarks of their respective owners SL 10533_REV3_07 13 Emerson Network Power The global leader in enabling Business Critical Continuity Technical Support Service Web Site www liebert com Monitoring liebert monitoring emerson com 800 222 5877
117. y wired to components on Electric service connection electric panel Electric service connection to contactor or terminal block Single or three phase electric ee service not provided by Liebert High voltage electric power Heat rejection connection Field supply entrance supplied 24V NEC class 2 wiring Wire connections from evaporator module 1 24V GND System 1 2 24V Supply System 1 3 High Pressure Alarm System 1 4 Hot Gas Bypass Connection System 1 5 24V GND System 2 6 24V Supply System 2 7 High Pressure Alarm System 2 8 Hot Gas Bypass Connection System 2 9 24V GND Condenser Fan 10 24V SUPPLY Condenser Fan Low voltage electric power supply entrance Earth ground connection terminal for field wiring DPNO000135 Rev 1 NOTE Refer to specification sheet for full load amp and wire size amp ratings 35 Liebert Mini Mate2 Site Preparation and Installation Figure 25 Footprint dimensions outdoor condensing unit Guard Height Top Air Discharge Right Air Intake Shaded area indicates a recommended clearance of 18 457mm for proper air flow Left Air Intake 2 Shaded area indicates a recommended Shaded area indicates clearance of 18 457mm Removable front panel for a recommended clearance for proper air flow access to high voltage amp of 24 610mm for component low voltage connections access and removal and refrigeration components 4 53

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