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Liebert Mini-Mate2™ - Emerson Network Power

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1. NOTE If free cooling is applied to an open water tower an optional copper nickel CuNi coil is requtred to prevent premature corrosion or a heat exchanger must separate the tower water from the free cooling loop The copper nickel coil requires an extended lead time Optional Configurations Prop Fan Condensing Units Outdoor Prop Fan Condensing Units are also available in the following optional configurations High ambient models for providing catalog capacities at ambient temperatures up to 105 F 40 C Quiet Line models for low noise level conditions below 56 dBA and for providing catalog capacities at ambient temperatures up to 95 F 35 C Condenser coils can be phenolic coated for extended coil life in coastal areas Optional Configurations Water Glycol Condensing Units Indoor Water Glycol Condensing Units are also available with the following piping options Two way water reg valve with 350 psi 2413kPa design pressure Three way water reg valve with 150psi 1034kPa design pressure Three way water reg valve with 350ps1 2413kPa design pressure Optional Configurations Chilled Water Units Chilled Water Units are also available with the following valve option Three way slow close motorized chilled water valve rated for 300 psi 2068 kPa working pressure Valve is non spring return Liebert Mini Mate2 10 Ship Loose Accessories Field Installed 4 0 SHIP LOOSE ACCESSORI
2. FIELDIPIPING Z Hose ak 2 FACTORY PIPING Bibs NOTE Hot water reheat only available Components are not supplied on chilled water units by Liebert but are recommended for proper circuit operation and DPN000197 maintenance Rev 2 41 Liebert Mini Mate2 Site Preparation and Installation 5 10 Checklist for Completed Installation _ 14 15 16 17 18 19 20 21 22 Proper clearance for service access have been maintained around the equipment Equipment is level and mounting fasteners are tight 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 All piping connections are tight Field provided pan with drain installed under all ducted cooling units and water glycol condensing units Filter box installed on ducted units Ducting completed or optional plenum installed Filter s installed in return air duct Line voltage to power wiring matches equipment nameplate Power wiring connections completed 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 co
3. Keep tines of the forklift level and at a height suitable to fit below the skid and or unit to prevent exterior and or underside 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 Product Number Nomenclature PRODUCT NUMBER NOMENCLATURE Figure 1 Model number nomenclature Evaporator units MM Liebert Mini Mate2 Blower Type D Disconnect Switch D Direct Drive 0 No Disconnect Switch Internal Blower g y B Belt Drive Nominal Capacity External Blower Unit Type E Split Evaporator K Split Evaporator with Free Cooling D 36 A H E D A Refrigerant aa IRE a No Rehea EPT Supply Power E Electric Reheat SO 1 phi lt 60Hz S SCR Reheat not available X 277V 1 ph 60Hz with free cooling S 220V 1 ph 50Hz 3 ton only A 460V 3 ph 60Hz 3 ton only Humidification Y 208 230V 3 ph 60Hz 3 ton only ES p saa M 380 415V 3ph 50Hz 3 ton only H Canister Humidifier 0 No Humidifier R Remote Humidifier Contact J Canister Humidifier and Remote Humidifier Contact Sensor Packages 0 None A 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 Temperatu
4. 15 4 5 5 0 14 5 8 or 7 8 suction 30 9 10 0 28 Table 12 Equivalent lengths for various pipe fittings ft m Copper Pipe 90 Degree 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 22 Site Preparation and Installation Refrigerant Charge Requirements Total R 407C refrigerant charge will be required only if units are evacuated during installation or maintenance For safe and effective operation refer to pressures in 5 5 3 Piping Connections and Coolant Requirements Total Refrigerant Units and Lines Table 13 Refrigerant charge modela Charge R 407C 60Hz 50Hz oz kg MM 24E K 7 0 198 MM 36E K MM 35E K 7
5. 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 FIGURES Model number nomenclature Evaporator units 0 ee eens 3 Model number nomenclature Air cooled indoor condensing units ooooooooo 3 Model number nomenclature Outdoor air cooled prop fan condensing units 4 Model number nomenclature Water glycol cooled condensing units 000 cee eee 4 Model number nomenclature Chilled water units nananana asauran eee teens 5 Wallebd tt aoa ee kine lace cused tee he Set ae one la bs he cada rns acne si a Sa 8 Free cooling arrangement deris energ ai o eee eee ene eens 10 Air cooled systems 2 and 3tons o 15 Water glycol cooled systems 2 and 3t0NMS ee eee eee enn 15 Chilled water systems 3 tons 2 0 0 eee cnet teen nna 15 Threaded rod and hardware kit installation 0 2 0 cc ene es 17 Refrigerant piping diagram oeiee AA a EAE ee een tenet ene eee 21 Dimensions evaporator and chilled water units with direct drive blower 24 Dimensions evaporator units with optional belt drive blower assembly 25 Evaporator and chilled water unit piping data 26 Evaporat
6. Minimum Maximum Units Minimum Maximum Outdoor Prop Fan 115 F 46 C standard unit Condensing Unit 125 F 52 C high ambient unit 5 10 30 F 34 C Indoor Air Cooled Condensing Unit 115 F 46 C Unit capacity ratings are stated for 95 F 35 C for standard units and 105 F 41 C for high ambient PFH units only Exceeding these rating points by 20 F 11 C will result in lower cooling capacities but will not damage the equipment Table 5 Application limits indoor water glycol cooled condensing units Input Voltage Entering Fluid Temperature Minimum Maximum Minimum Maximum 5 10 65 F 18 3 C 115 F 46 C Operation below 65 F 18 C may result in reduced valve life and fluid noise 13 Liebert Mini Mate2 Site Preparation and Installation 5 1 2 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 contain either rubber or plastic 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 t
7. 1ph 50Hz 3 ton only i A 38 3 ton 60Hz A 460V 3ph 60Hz 3 ton only D Disconnect Switch Y 208 230V 3ph 60Hz 3 ton only Cooling Method M 380 415V 3ph 50Hz 3 ton only W Water Glycol MC D 38 W 2 A H 7 Head Pressure Controls 2 2 Way Standard Pressure Water Reg Valve 3 3 Way Standard Pressure Water Reg Valve D 2 Way High Pressure Water Reg Valve T 3 Way High Pressure Water Reg Valve 0 No Disconnect Switch Refrigerant 7 R 407C H Hot Gas Bypass Liebert Mini Mate2 4 Product Number Nomenclature Figure 5 Model number nomenclature Chilled water units MM Liebert Mini Mate2 D Disconnect Switch Be Di BANG Internal Blower ANO Disconnect Switch Cooling Method B Belt Drive External Blower C Chilled Water Nominal Capacity 39 3 ton 50Hz Valve Type 40 3 ton 60Hz 2 2 Way Chilled Water Valve 3 3 Way Chilled Water Valve MM D 40 C 3 A H E D A Supply A P 208 230V 1 ph 60Hz Humidificati Reheat Type X 277V 1ph 60Hz Bee o 0 No Reheat S 220V 1ph 50Hz H Canister Humidifier E Electric Reheat A 460V 3ph 60Hz 0 No Humidifier H Hot Water Reheat Y 208 230V 3ph 60Hz R Remote Humidifier Contact M 380 415V 3ph 50Hz J Canister Humidifier and Remote Humidifier Contact Sensor Packages 0 None A Filter Clog B Smoke Sensor C High Temperature Sensor D Filter Clog amp Smoke Sensor E Filter Clog
8. 5 5 5 Condensate Pump Kit Installation All Units A WARNING Risk of electric shock Can cause injury or death Open all local and remote electric power disconnect switches before making electrical wiring connections 1 Refer to detail instructions and drawings supplied with the pump 2 Disconnect all power to the unit 3 Remove access panels NOTE Remove any shipping bands from float switch in evaporator pan 4 Use mounting brackets if pump is not attached to ductwork Pump inlet must be at least 1 2 in 12 7mm below evaporator drain Mount the pump to unit exterior as shown in Figure 15 5 Connect 3 4 in flexible rubber tubing with hose clamp both supplied with pump kit to 3 4 in hose barb fitting on pump 6 Connect evaporator drain to 3 4 in NPT Female hose assembly on pump inlet using 3 4 in hard pipe with no trap in the line Provide at least 1 in 25 4mm clearance between the access panel and the drain line Support piping as required 7 Connect a drain line to the pump discharge 3 8 in O D Cu compression fitting provided 8 Connect electric leads L1 and L2 to the line voltage terminal block in the cooling unit Connect the ground lead to the lug near the terminal block 9 Connect wires from the Auxiliary Pump contacts to terminals TB1 8 and TB1 9 to shut down unit at the occurrence of a high water condition in the pump 10 Reinstall the access panels 11 Reconnect power to the unit 12 Ru
9. For Business Critical Continuity Precision Cooling User Manual 2 amp 3 Tons 50 amp 60Hz Liebert Mini Mate2 A So e o Pil A Ny av i ally a ll EMERSON Network Power TABLE OF CONTENTS IMPORTANT SAFETY INSTRUCTIONS 0000 cee eee e eee eee eee eee ees 1 PRODUCT NUMBER NOMENCLATURE 00 00 cece eee eee eee eee nese tenet eens 3 1 0 INTRODUCTION och See ees Soa thes a hee te tate es bone Bee eee eae eee 6 1 1 Designed to Match Computer and Electronic Equipment Needs From Installation t6 Operation 6 2 0 STANDARD FEATURES 2 amp 3 TON SYSTEMS 0002 cece eee eee e eee ee eee eaes 7 2 1 Evaporator Section Split Systems 7 2 2 Condensing Unit Section Split Systems T 2 2 1 Indoor Centrifugal Fan Condensing Units 0 0 0 0 ccc eee nee T 2 2 2 Outdoor Prop Fan Condensing Units 7 2 2 3 Indoor Water Glycol Condensing Units 7 2 3 Called Water MEL O E E RAE SAA A AA A Acute A A a 7 2 4 System Controls cari dia Pe eh A A Se a Ree Bd ba eee as 8 2 4 1 Other Standard Control Features 0 000 teen e ene eens 8 3 0 OPTIONAL FACTORY INSTALLED FEATURES EVAPORATOR CHILLED WATER UNITS 9 3 1 Relea tad nse Ae a han Seed eee each Ge nta aa 9 3 2 Eder o a avn beat ga ares Ya ae Manas wide tee a Ue Gu ire eA an 9 3 3 DENSAS et eee eee hee Ae bude ees Pea ews Shae ea eee awed ad 9 3 4 SWitehesand MOE etcetera A otra on eh Rouge OP Gare gas Sees ote
10. Review section 5 5 5 Electrical Connections Verify VDC between 5 and 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 second If T is connected but not T TX1 will flash approximately every 2 3 second And the power LED will flash once every 10 12 second If T and T are reversed the power LED and RX1 Will be lit and flash every 10 12 second 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 70 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 Continuity 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 infrastruct
11. 2VAC If no voltage check wiring and or replace board Check wiring from control panel to board 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 wall box 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 69 Liebert Mini Mate2 Troubleshooting Table 31 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 30 HEAT not displayed at the control panel Increase temperature set point to require heating Reheat safety open defective reheat contact or defective board Check voltage at P2 1 and P1 9 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 GCD has tripped Replace GCD and heating element Fan will not operate at low speed wh
12. 5 5 2 3 8 Threaded Rod field supplied 3 8 Hex Nut 3 8 Washer Sleeve 3 8 Hex Nut 3 8 Hex Nut Nylock Unit Base Pan ref Close Coupled Installations If the evaporator and indoor condensing units are to be mounted back to back close coupled hang each unit before connecting them together Align four bolt holes in the condensing unit with cage nuts in the evaporator Insert rubber spacers and secure with provided hardware Align the refrigerant connections and tighten them as described in 5 5 3 Piping Connections and Coolant Requirements see Figure 17 Close coupled installations may take advantage of a single point power kit to allow one power feed to provide input for both evaporator and condensing units Kit should be mounted in evaporator unit before raising unit into ceiling area Evaporator Air Distribution Filter Box The optional filter box is available for the unit and mounts directly to the return air opening of the evaporator The 2 and 3 ton filter box is supplied with a MERV 8 filter per ASHRAE 52 2 2007 measuring 20 in x 20 in x 4 in 508x508x102mm 17 Liebert Mini Mate2 Site Preparation and Installation 5 5 3 Plenum Installation The 2 and 3 ton non ducted evaporators can use the optional ceiling mounted plenum to provide four way air distribution The plenum fastens to the bottom of the evaporator The plenum includes a 16 in x 25 in x 4 in 406x635x102mm MER
13. Risk of contact with extremely hot surfaces Can cause injury The canister and steam hose may be hot Allow time for the humidifier to cool before replacing parts The proper procedure to replace the humidifier canister is 1 Qn p won Turn off the humidifier by lowering the humidity setpoint below the ambient humidity level Record the original setpoint 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 canister has drained Turn OFF the power at the main unit electric power disconnect switch Remove the cover from the humidifier cabinet 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 two 2 power wires and the canister full wire Do not loosen the screws that secure the electrodes Loosen the steam outlet hose clamps and slide the steam hose away from the canister fitting Release the canister clamp along the base of the canister Remove the canister Reverse previous steps to re assemble humidifier paying special attention to the following When replacing the wiring connect the red wire from terminal 1 on the interface to the red tip terminal on the canister Reconnect the power wires as before 2 on the left and 1
14. amp High Temperature Sensor F Smoke Sensor amp High Temperature Sensor G Filter Clog Smoke Sensor amp High Temperature Sensor 5 Liebert Mini Mate2 Introduction 1 0 INTRODUCTION 1 1 Designed to Match Computer and Electronic Equipment Needs From Installation to Operation Installed above the ceiling Liebert Mini Mate2 Precision Cooling systems control the cooling humidity and air distribution required by sensitive electronic equipment range of sizes and configurations is available to meet varying sites 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 Emerson quality construction and reliable components guarantee satisfaction from installation through operation Liebert Precision Cooling Liebert Precision Cooling systems are designed to control the environment required for computers and other sensitive electronic equipment The Liebert Mini Mate2 provides complete control on an around the clock basis and the high sensible heat ratio required by sensitive electronic equipment Easy Installation The Liebert Mini Mate2 is a split system evaporator combined with an air water or glycol cooled condensing unit or is a self contained chilled water unit Each split system has thermostat type wiring to controls and c
15. in mm 5 1450 1 0 25 4 0 4 10 2 4 5 1510 1 1 28 8 0 5 13 6 4 1570 1 3 32 4 0 7 17 2 3 5 1630 1 4 36 1 0 8 20 9 3 1690 1 6 40 0 1 0 24 7 2 5 1750 1 7 44 0 1 1 28 7 2 1810 1 9 48 1 1 3 32 8 1 5 1870 2 1 52 4 1 5 37 1 1 1930 2 2 56 8 1 6 41 5 0 5 1990 2 4 61 3 1 8 46 1 0 2050 2 6 66 0 2 0 50 8 9 2 5 Refrigeration System Each month the components of the refrigeration 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 58psi to 75psi 405kPa to 517kPa Discharge Pressure The discharge pressure will vary greatly with load and ambient conditions see Table 29 The high pressure switch will shut the compressor down at its cut out setting Table 29 Typical discharge pressure System Design Discharge Pressure psig kPa Air Cooled 200 300 1380 2070 Water Cooled 65 to 85 F water 18 to 29 4 C Glycol Cooled 250 350 1725
16. 0 198 MC 24AL_H7 134 3 80 MC 36AL_H7 MC 35AL_H7 213 6 04 MC 26W_H7 41 1 16 MC 38W_H7 MC 37W_H7 54 1 54 PFHO27 _L7 134 3 80 PFH027 _H7 213 6 04 PFHZ27 _L7 213 6 04 PFHO37 _L7 PFHO36 _L7 213 6 04 PFHO37 _H7 PFHO36 _H7 426 12 08 PFHZ37 _L7 PFHZ36 _L7 426 12 08 Quick Connect Fittings NOTE When hard piping is used complete 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 SU NS gt 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 insure 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 insure that the joint will not leak Refer to Table 14 for torque requirements Table 14 Connection sizes and torque Size OD Cu Model Tons Coupling Size Torque lb
17. 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 valve operation can be determined by measuring superheat level If too little refrigerant is 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 61 Liebert Mini Mate2 System Testing and Maintenance Air Cooled Condensing Units Restricted airflow through the condensing unit 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 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 Only Each water or glycol cooled module has a coaxial condenser consisting of an exterior steel tube and an interior copper tube If the water supply is clean co
18. 7 8 22 2mm OD Cu Extends 3 1 2 88 9mm beyond panel exterior Chilled Water Return Line OUT 7 8 22 2mm OD Cu Extends 3 1 2 88 9mm beyond panel exterior Single Point Power Kit SPPK Harness Connection from Condensing Unit BACK OF UNIT Evaporator Air Inlet For Plenum Version Evaporator Air Outlet with Access Valve For Plenum Version Power Supply from Electric Service Power Block in Fan Coil Module Air Outlet Duct Drain Line Field Supplied Fan Coil Unit 3 4 Hose Barb leo dens le Pump Supplied on Support Brace l Pump Tank oe Flexible Rubber Tubing o 3 4 FPT Customer Connection Field Supplied Rigid Piping Condensate Drain Support as Required CONDENSATE PUMP Field installed Note On Unit with Air Outlet Ductwork 3 4 19 1mm Flexible Rubber Tubing Assembly Supplied with Pump Kit must be installed on pump end of rigid piping support as required Fan Coil Drain Line Unit i Power Supply Field Supplied from Electric Service Power Block in Fan Coil Module 3 4 Hose Barb Supplied on Pump Tank Flexible Rubber Tubing 3 4 FPT Customer Connection Condensate Field Supplied Pump Support Rigid Piping Brace Support as Required CONDENSATE PUMP Field installed On Unit with Air Distribution Plenum Condensate Drain DPNO0192 Rev 1 Liebert Mini Mate2 Site Preparation and Installation 5 5 4
19. 762mm e Cabinet 14 Di 356mm imension Outlet Dimension 18 457mm Outlet Dimension DPNO0O00194 Rev 3 25 Liebert Mini Mate2 Site Preparation and Installation Figure 15 Evaporator and chilled water unit piping data Entrance for Customer High Voltage Connections Entrance for Customer High Voltage Connections with SPPK Single Point Power Kit Evaporator Air Inlet on Ducted Version Filter Clog Switch Option Connection Point Entrance for Customer Low Volt Connections 7 8 22 2mm Diameter Entrance For Low Voltage Connection to Condensing Unit if applicable Hot Water Reheat 5 8 15 9mm OD Cu or Free Cooling Outlet 7 8 22 2mm OD Cu Extends 3 1 2 88 9mm Beyond Panel Exterior Hot Water Reheat 5 8 15 9mm OD Cu or Free Cooling Inlet 7 8 22 2mm OD Cu Extends 3 1 2 88 9mm Beyond Panel Exterior Evaporator Air Outlet on Ducted Version Optional 1 4 O D Compression Fitting Use Copper Lines for Humidifer Supply Line NOTE Route supply line to Clear hanging rods 7 8 Dia 22 2mm Electrical Entrance for Condensate Pump Connection Suction Refrigerant Line Quick Connect Female Coupling with Access Valve Liquid Refrigerant Line Quick Connect Female Coupling FRONT OF UNIT 3 4 NPT Female Condensate Drain Connection Drain is trapped internally and Must Not betrapped outside the module Chilled Water Supply Line IN
20. 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 57 Liebert Mini Mate2 Alarms 8 1 8 Short Cycle A Short Cycle Alarm will occur if the compressor system has exceeded 10 cooling start attempts in a one hour period This can be caused by low refrigerant level or room cooling load is small compared to capacity of the unit Check for leaks crimped lines and defective components If room load is low increase sensitivity to reduce cycle 8 2 Optional Custom Alarms 8 2 1 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 8 2 2 High Temperature Sensor The optional high temperature sensor feature is a bimetal operated sensing device with a closed switch under normal conditions Connected between pins 1 8 and 1 9 this device will shut down t
21. Check water make up valve for leaks Drain Lines 1 Check for obstructions and sediment build up 2 Check for external damage and or corrosion 3 Check for leaks Flood Back Head Pressure Control if applicable ___1 Check refrigerant level Water or Glycol Cooled Condensing __ 1 Water valve adjustment __ 2 Water flow __ 3 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 Signature Make photocopies of this form for your records Liebert Mini Mate2 68 Troubleshooting 11 0 TROUBLESHOOTING Table 31 Troubleshooting Symptom Unit will not start Possible Cause No power to unit Check Or Remedy Check voltage at input terminal block Control voltage circuit breaker at transformer open Locate short and reset circuit breaker Float switch relay has closed due to high water in the condensate pan Has rubber band been removed from float switch Check drain and line Access from bottom through discharge air gills Power must be cycled at the disconnect to reset Jumper not in place Check terminal TB 1 4 and TB1 5 for jumper or N C contact Check pins 1 8 and 1 9 for jumper or N C high temperature sensor contact Check pins 5 4 and 5 5 for jumper or N C smoke detector contact No cooling Compressor high
22. 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 Down Arrow to select a particular alarm press Enter to select either enable or disable Then press Enter again to store the change When the alarm is disabled it will NOT report to either the wall box beeper or the common alarm relay NOTE The high water alarm will automatically shut the unit off even if the alarm is disabled similarly optional factory installed smoke sensor is wired to shut the evaporator unit Off regardless of the enable disable status Alarm Time Delay Each individual alarm can be programmed with a time delay causing the unit to delay a specified amount of time 0 255 seconds before recognizing the alarm See Table 24 for the default times 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 time will automatically reset NOTE For software alarms such as loss of power and short cycle the time delay should be left at the factory default of 0 Table 24 Alarm default time delays Default Time Alarm Delay seconds Humidifier Problem 2 High Head Pressur
23. NOTE Installing the remote sensors disables the sensors included in the wall box 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 277 to 208V step down transformer 37 5 amps allows use of 277 1 60 supply power with a 208 1 60 Prop Fan Condensing unit The transformer is coated with epoxy and contained in an enclosed non ventilated electrical box with adaptable mounting brackets Single Point Power Kit contains the necessary electrical components to interconnect the high voltage sections of a close coupled evaporator and an MCD condensing unit Pre Charged Refrigerant Line Set R 407C contains an insulated copper suction line and a copper liquid line for interconnection of the indoor and outdoor sections Available in 15 foot 4 5m and 30 foot 9m sections The Refrigerant Line Sweat Adapter Kit contains two suction and two liquid line fittings that allow field supplied refrigerant piping between the evaporator and condensing unit 11 Liebert Mini Mate2 Ship Loose Accessories Field Installed 4 1 Remote Monitoring Autochangeover and Leak Detection Equipment The Liebert RCM4 isa four point normally open dry contact monitoring panel One Form C
24. New PSW Setup PSW 000 Calibrate Sensors Temp Cal Hum Cal Temp Delay Hum Delay Alarms Enable Custom 1 Custom 2 HighTemp Low Temp High Hum Low Hum Short Cyc Loss Pwr Alarm Time Delay Custom 1 Custom 2 HighTemp Low Temp High Hum Low Hum Short Cycle Loss Pwr Common Alarms Enable Hi Water Hi Head Custom 1 Custom 2 HighTemp Low Temp High Hum Low Hum Short Cyc Loss Pwr Custom Alarms Custom Alarm 1 Custom Alarm 2 Custom Text Custom Text 1 Custom Text 2 Diagnostics Test Inputs Test Outputs Test Microcontroller 51 Liebert Mini Mate2 Microprocessor Control Figure 28 Control board inside evaporator Adel GJ 4 LR TIN ASSY lel tl T Sg ld Eg Zg sd y Oa p10 an pa su a DIP E Epa al aca 0 f Switches fn i Blin k aa 5t mm 32H ik SEA e za A a u uuu use nH mwmw ar oT O da e MAR Wo ano a l 1 Ed E Das y he O z ee e a ia 5 w Say ay M Se E gea ra onh aias pog mr S da u OP ee O fo 2h APIBEn gt ET Eriet La E U i as MELES EbIK LEE Gp u x i 40 ine ce i U IRE LJ exo Sih emy HO el a Llob 0 l p3 gir x ar a Ly ee El Ea a n E nq
25. On the third occurrence the control will lock the compressor off until the control power is reset Liebert Mini Mate2 56 Alarms 8 1 4 8 1 5 8 1 7 Air Cooled Systems Check for power shut off to the condensing unit condenser fans not working defective head pressure control valves closed service valves dirty condenser coils or crimped lines Also make sure that when the compressor contactor is energized the side switch on the contactor closes to energize the control circuit on the condensing unit Water Glycol Systems Check water regulating valves Verify water glycol flow 1 e 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 operating during cooling to turn on the drycooler Humidity Level The humidity level alarm may be activated under the following conditions High The room return air humidity exceeds the pre set high humidity alarm set point Is the unit set up for dehumidification Check DIP switch Low The room return air humidity decreases to the high humidity alarm set point Is the unit set up 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
26. 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 0499719111 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 2 730 9572 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
27. 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 and local codes Use field supplied threaded suspension rods and 3 8 16 factory hardware kit Recommended clearance between ceiling grids and building structural members is unit height plus 3 in 76mm Install the four field supplied rods by suspending them from suitable building structural members Locate the rods so that they will align with the four mounting holes in the flanges that are part of the unit base Liebert Mini Mate2 16 Site Preparation and Installation 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 four mounting holes in the flanges that are part of the unit base Attach the threaded rods to the unit flanges using the supplied nuts and grommets See Figure 11 The rubber grommets provide vibration isolation 1 First use the plain nuts to hold unit in place Adjust these nuts so that the weight of the unit is supported evenly by the four rods does not rest on the ceiling grid and to ensure the unit is level NOTE The units must be level in order to drain condensate properly 2 Second use the shake proof nuts to jam the plain nuts Figure 11 Threaded rod and hardware kit installation 5 5 1
28. at the supply and return line to each unit This permits routine service and emergency isolation of the unit Install 1 2 13mm diameter condensing fluid inlet and 1 2 13mm diameter condensing fluid outlet When the condensing fluid quality is poor Emerson recommends placing proper filters in the supply line to extend the service life of the condenser These filters must be easily replaced or cleaned The standard maximum fluid pressure is 150 psig 1034 kPa or optional 350 psig 2413 kPa systems For applications above this pressure consult the factory The water glycol cooled system will operate in conjunction with a cooling tower city water or drycooler NOTICE Risk of frozen pipes and corrosion from improper coolant mixture Can cause equipment and building damage When piping or the Liebert Mini Mate2 may be exposed to freezing temperatures charge the system with the proper percentage of glycol and water for the coldest design ambient Automotive antifreeze is unacceptable and must NOT be used in any glycol fluid system Use only an HVAC glycol solution only that has been prepared according to industry practices Refrigerant R 407C Loop All split systems require two refrigerant lines an insulated copper suction line and a copper liquid line between the evaporator and the condensing unit The refrigerant lines can be piped by installing an optional sweat adapter kit and hard piping between the two units optional p
29. converse is true for percent humidification requirement Dehumidification Operation Compressorized Direct Expansion DX Systems Dehumidification with the standard configuration is accomplished by operating the compressor without the hot gas bypass active On cooling units with direct drive motors the fan will operate at low speed unless the cooling requirement reaches 100 At that point the low speed fan is disabled unless manually overridden by the user until the cooling requirement decreases to 0 Dehumidification will also be disabled if the heating requirement exceeds 125 It will be re enabled when the heating requirement reaches 50 Humidification Operation The canister humidifier is activated when the humidity control calculates a requirement of 100 humidification and it is deactivated when the humidification requirement falls below 50 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 on cycle occurs too often e g 10 times in a one hour period a Short Cycle Alarm will occur Communication The control system uses a two wire RS 422 channel to communicate with Liebert Site Products via a proprietary protocol A converter board ECA2 is available to allow communications with a dumb terminal or a computer using RS 232 channel More details are provided in the Site Products and ECA2 user manual The communications ch
30. each degree difference between 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 i e 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 The predictive humidity control can greatly reduce energy consumption by minimizing compressor reheat operation Use the Up Down Arrow key to select the desired humidity control method Table 23 Setup functions default values and allowable ranges Function Default Range 0 to 9 9 min Restart Time Delay 0 1 minute 0 manual restart C F Degrees F C or F Humidity Control Rel Relative or Absolute Change Passwords The disp
31. entrance Heat rejection connection Field supplied 24V NEC Class 2 wiring See note 2 Wire connections from evaporator mod 1 24V GRD NOTES DPNO00207 2 24V Supply 1 Refer to specification sheet for full load amp and Rev 2 3 High Pressure Alarm OPT wire size amp ratings 4 Hot Gas Bypass Connection 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 33 Liebert Mini Mate2 Site Preparation and Installation 5 7 Outdoor Air Cooled Condensing Unit Installation 5 7 1 Location Considerations NOTE Follow all national and local building electrical and plumbing codes To ensure a satisfactory air supply locate air cooled propeller fan condensing units in an environment providing clear 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 Refer to Table 9 for maximum refrigerant line lengths Install a solid base capable of supporting the weight of the condensing unit The base should be at least 2 inches higher than the surrounding grade and 2 inches large
32. example to change the temperature setpoint from the main status display 1 Press the Menu key to display the main menu 2 Scroll to SETPOINTS using the Up Down arrow key Press the Enter key 3 Scroll to TEMP SETPOINT using the Up Down arrow key Press the Enter key 4 Use the Up Down arrow to change the value Press the Enter key Table 21 View default setpoints and allowable ranges Setpoint Default Range Temperature Setpoint 72 F 40 90 F 5 32 C Temperature Sensitivity 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 84 RH Liebert Mini Mate2 44 Microprocessor Control 6 4 6 5 6 6 6 7 6 8 Status The operator can monitor the percentage heating cooling dehumidifying and humidifying status of the unit by selecting the STATUS sub menu Active Alarms The operator can monitor the alarms status by selecting ALARMS which will display a No Alarm Present or Alarm XX of YY alert and description If more than one alarm is activated use the Up 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 Time The con
33. ft 3 8 2 and 3 6 10 12 5 8 2 and 3 11 35 45 23 Liebert Mini Mate2 Site Preparation and Installation Figure 13 Dimensions evaporator and chilled water units with direct drive blower 1 7 16 Customer Supplied 37mm Threaded Rods for Module Suport from 762mm Ceiling Typ 4 Cabinet eiling Typ 4 Dimension 27 13 16 11 1 8 706mm 283mm Threaded Rod Cente a 24 i 14 10 7 8 30 356mm 276mm Removable 1 7116 Access 37mm Panels Optional discharge air duct flange supplied when I optional filter box is ordered 18 457mm al 356mm 18 Cabinet 457mm Dimension 18 457mm de S i Cabinet 57 13 16 Dimension 1468mm 4 E iane Overall AS Dimension A 1418mm ee Threaded racket o a a Shaded area indicates a recommended clearance Duct of 30 762mm for access Flange and filter removal o 11 5 8 a i Cabinet Outline 295mm 7 8 22mm holes Note Unit is spaced evenly in for module rigging reference to threaded rod centers typ 2 each end Shaded area indicates a recommended Filter Box optional clearance of 30 762mm Module Dimensions for access and filter removal Cabinet Dimension Cover Plate same as above Supplied With Plenum Removable panel on side of plenum Minimum clearance 30 762mm for filter access and removal 1219mm Overall Dimension Air Discharge ou
34. head pressure 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 Check for 24 VAC 2 VAC at terminals P4 8 and P4 4 If voltage check contactor If no voltage at P4 8 and P4 4 check at terminals P2 3 and P2 8 If voltage check freezestat Compressor high head pressure See below for cause Plugged filter drier Low refrigerant charge Insufficient air flow across condenser coil Replace filter dryer Check pressure gauges See Table 11 and Table 13 for recommended pressures At low ambient temperatures proper refrigerant charge is very important on units with Lee Temp receivers Remove debris from coil and air inlets Water Glycol cooled only No fluid flowing through condenser Self Contained Air Cooled only Condenser fan not operating Check fluid supply to regulating valve Adjust valve if necessary Check fan operation Humidifier does not operate DIP switch not set to enable humidifier option HUMIDIFY not displayed at control panel See DIP switch setting Table 30 Increase humidity control setpoint and sensitivity to require humidification Defective board Failed humidity sensor Check voltage at P3 1 and P1 9 on interface board for 24VAC
35. on the right When replacing the canister always check the fill and drain solenoids for proper operation 67 Liebert Mini Mate2 Maintenance Inspection Checklist 10 0 MAINTENANCE INSPECTION CHECKLIST Date Model Prepared By Serial Number NOTE 4 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 appropriate cleaning should be performed Periodic reheating element replacement may be required to meet specific application requirements Monthly Inspection Items Filters __ 1 Check for restricted airflow __ 2 Check for filter __ 3 Wipe section clean Fan Section 1 Impellers free of debris ___ 2 Bearings in good 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 Motor mount tight 2 3 Bearings in good condition 4 Refrigerant lines properly supported Notes Humidifier 1 Check canister for mineral deposits __ 2 Check condition of electrodes 3 All hoses and fittings tight ___ 4
36. system deactivates both humidification and dehumidification Check for a disconnected cable or failed sensor Temperature The temperature level alarm may be activated under the following conditions High The room return air temperature increases to the high temperature alarm set point Check for proper set point value Is the room load more than the unit can handle 1 e capacity too small Make sure cooling components are operating compressor or valves Low The room return air temperature decreases to the low temperature alarm set point Check for proper set point value Make sure all heating components are operating 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 85 RH Dashes will be displayed for the temperature reading The control system will initiate 100 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 the humidifier control board Constant LED on Overcurrent 1 second LED Flash Fill System 1 2 second LED Flash Replace Tank High Water
37. that water leaks can cause damage to sensitive equipment C U S 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 mount units in areas where normal unit operating sound might disturb the working environment Liebert Mini Mate2 6 Standard Features 2 amp 3 Ton Systems 2 0 STANDARD FEATURES 2 3 TON SYSTEMS 2 1 2 2 2 2 1 2 2 2 2 2 3 2 3 Evaporator Section Split Systems 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 and ASTM 1338 standards The evaporator section includes the evaporator coil R 407C unit charge filter drier factory mounted disconnect switch two speed direct drive blower assembly and microprocessor control with wall mounted control box The unit is provided with supply and return air openings for field supplied ducting or supply return plenum 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 S
38. the trap is carried up the vertical riser and returns to the compressor see Figure 12 Figure 12 Refrigerant piping diagram Pitch down 1 2 13mm per 10 ft 3m 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 level drop to condensing unit is 15 ft 4 6m Evaporator Suction Line Piping Condensing Unit Below Evaporator i Condensing Unit Condensing See Table 9 for recommended maximum Unit vertical rise above fall below evaporator Evaporator Suction Line Piping Condensing Unit Above Evaporator Traps recommended atthe base of riser exceeding 5 ft 1 5m and every 20 feet 6m of vertical rise Pitch down 1 2 13mm per 10 ft 3m NOTE When installing remote condensing units below the evaporator the suction gas line should be trapped with an inverted trap the height of the evaporator This prevents refrigerant migration to the compressor during off cycles 21 Liebert Mini Mate2 Site Preparation and Installation Table 8 Recommended refrigerant line sizes 2 Ton 3 Ton Equivalent Length ft m Suction Liquid Suction Liquid 50 15 2 7 8 3 8 7 8 1 2 100 30 5 7 8 1 2 1 1 8 2 1 2 150 45 7 7 8 1 2 1 1 8 2 1 2 1 Su
39. unless High head Pressure alarm is active Custom alarm 1 Normally Off unless this special customer selectable alarm 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 these optional devices high temperature sensor smoke detector high water alarm or remote shutdown Test Outputs When this feature is selected the unit 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 The outputs are Normal Fan Normal speed fan contactor Low Speed Fan Low speed fan contactor e Humidifier Humidifier con
40. 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 7 0 7 1 Indoor Air Cooled Centrifugal Fan Condensing Unit Installation 30 5 6 1 Location Consliderati0ons o e cc eee EE E E een nes 30 5 6 2 Electrical Connections ures iesenii ri aE a E E E n AEE a E E Aa E 30 5 6 38 Piping Connections 31 DOA DUGG sooth O NO 31 Outdoor Air Cooled Condensing Unit Installati0N oooooooooooooooo o o 34 501 Location Considerations a ee aot ee Gee hs Le aH big owe she ESS oe oe aw Bran Sa 34 51 27 Piping Connections uuas 6 seh A A Bh aS Fc BER A A hee Sn Fa A EG BA 35 5 0 Electrical Connections aeie ss a BOA es dee Gree ee FES a oe ile GET a atad 35 Water and Glycol Cooled Condensing Unit 00 000 ees 36 5 8 Py Location Considerations ysa tee ee ghee A A Noa A a ed ete ls a teen ge 36 5 8 2 Electrical Connections 40 0 3 0s seb A a a hae Dense dG Boek ean 38 5 83 PIPE CONNECT E st LSE Spee PP Oe IT Soles ty 38 Optional Equipment Piping ononon ee eee eee eens 40 5 9 Free Cooling Cou asert ice does Boek E habe ose pnd ys eho rd PA apy SNOT Sie wet lea 40 5 9 2 Hot Water Reheat Coil 2 ooo 41 Checklist for Completed Installation 4 4 20 esa eke A eee a Ek ee SS 42 MICROPROCESSOR CONTROL 000 e cece eee eee eee eee ee eee eee eee ees 43 Feature Overview is Wik ed AA E OE OE led WERE OO ae a e 43 Main Men lt Menu gt 2 6 veh A ak ned mea fae d ROU
41. 5 5 Ceiling Unit Weights Table 6 Ceiling unit weights Weight Model Ib kg Cooling Units MMD24E 225 102 MMD35E 225 102 MMD36E 225 102 MMD39C 230 104 MMD40C 230 104 Indoor Condensing Units MCD24A 270 125 MCD35A 280 130 MCD36A 280 130 MCD26W 190 90 MCD37W 200 95 MCD38W 200 95 MCD38W 200 95 Add 20 Ib 9kg to units with free cooling or hot water reheat coils 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 damaged report it to the shipper and to your Liebert supplier Packaging Material All material used to package this unit is recyclable Save it for future use or dispose of the material appropriately Installing the Ceiling Units A WARNING Risk of ceiling collapse and heavy unit falling Can cause building and equipment damage serious injury or death Verify that the supporting roof structure is capable of supporting the weight of the unit s and the accessories see 5 2 Ceiling Unit Weights Be sure to securely anchor the top ends of the suspension rods Make sure all nuts are tight The evaporator unit and condensing unit are usually mounted
42. 8 230 Off On Off On 6 4 220 240 Off On Off On 6 4 277 On Off Off On 5 7 380 415 Off Off On Off 3 7 460 On On Off Off 3 4 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 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 ignore 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 contacting caustic substances Can cause injury Avoid touching or contacting the gas and 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 Ifa compressor failure has occurred determine whether its cause is an electrical or mec
43. B3 Pin 2 wall box TB1 7 Common Alarm Connection TB3 1 Connection to TB3 Pin 1 of wall box TB1 6 Common Alarm Connection TB4 2 Site Monitoring Connection TB1 5 Remote Shutdown TB4 1 Site Monitoring Connection TB1 4 Remote Shutdown P16 Remote Sensor Connection Figure 29 Wall box board u12 c34 Qe Say ASSY NO 4153616 P2 os qi c25 DS Bi R52 c28 a ps PIR res LE rm a GND Te m K1_R39 LL y 5V I m E aa T vai cig PEON P 35 pig NP a ae L T Pa at A G US C22 4 R54 U3 R46 R44 C27 he L cias rss Z ao Ax2R60 pal TPS TP3 p5 g EE ba L R3T or Ti cs Ad are RICE U11 mee aa Ss Res LS1 He ara J R27 L Ra ie R25 E Rr er AI E RD L Re we Wall Box S DIP switches 1 8 RHI ITI sah RIS O ae att RTO C Ree Rey Rie Pas Liebert Mini Mate2 52 System Performance Microprocessor Controls 7 0 SYSTEM PERFORMANCE MICROPROCESSOR CONTROLS This section provides a detailed description of how the Liebert Mini Mate2 responds to operator inputs and room conditions 7 1 Temperature Control 7 1 1 Cooling Heating Required The temperature control program for the microprocessor is based on a calculated percentage requirement for cooling heating 7 1 2 Cooling Operation Cooling Compressorized Direct Expansion and Chilled Water Cooling is ACTIVATED when the temperature control calculates a requirement for cooling of 100 It is DEACTIVATED when the cooling requirement drops below 50 The optional hot gas bypass is energiz
44. BNA ha ee Bre ten RAS SES 44 DEPOR Wale Wi Rs A E BARGE WER CAR BR SG HER BS 44 Status ida eth A ee Gn oh Bb Ne ol Be Sa Sd Wi heel od a ba Med 45 Active Alaris a ses A O Se APE GARA GORE IE a EERE ORE a 45 PUNO A eye Pea SS AES ENA SER MNT its alesis ath BOI A Ai 45 Date a alates wea acted a das 45 Setback sods ae Mis uss ai cates A A OE SS SE Ge e Ae a ae hat a 45 Setup Operation gt 64242208 A Bel Soa eas Bb Ra ae eal eo Shad BA a led tea Sint 46 6 9 1 Restart Time Delicia da deen db a O disse shaded 46 6 9 25 SOUP Degrees is park od ele Mba te Ales e cel due ne Aah Dude aos les Lena Bando adeeb 46 6 9 3 Humidity Control Method 46 Change Passwords raas a o secs A SER ey EN a OG AEA TET AS OG Fe 46 Calibrate Sensors nie take Sack A A Oe ae gH Bees WS A AS PN A 47 Alarm Kina bles ied 8S A dae Pe aa id ls Ee Va AS a ee AR 47 Alarm Time Delays skates icin dd tect hi ii td A DAA hoch at 47 Eommon Alarm Enable 0 ARA A id Reed 47 Custom Alarms 34 TAE A AS A EE SE RL DIED PAE LE 48 6 15 1 Standard Custom Alarm Messages 48 Custom Text ari dd Ls EA da dr Sig eis 48 Run Diagnostics Available On Rev 1 001 0 and Higher oooooocoocoooooo 50 SYSTEM PERFORMANCE MICROPROCESSOR CONTROLS ococcoccocooo 53 Temperature Control o ee eee eee 53 7 1 1 Cooling Heating Required 0 0 cece cnet eee e een nns 53 7 1 2 Cooling Operation Cooling Compressorized Direct Expansion and Chilled
45. Bottom of Unit Rigging typ 2 each end Duct Connection Minimum Clearance 33 838mm Duct Flange for Component Access and Removal Integral Hanging Bracket 2 14 Minimum Clearance 33 838mm 57mm This End for Component Access and Removal Note Unit is evenly spaced in reference to threaded rod centers 7 8 22 2mm Dia Electrical Entrance for Line Voltage Connection 7 8 22 2mm Dia Electrical Entrance for Low Voltage Connection Suction Line Male Quick Connect Liquid Line Male Quick Connect DPN000206 Rev 1 Table 18 Centrifugal condenser dimensions weights Net Weight Model A B Cc D Ib kg MC 24A 230 104 MC 35A 1 7 16 37 11 7 16 290 1 2 13 20 7 16 519 240 109 MC 36A Source DPN000206 Rev 1 Liebert Mini Mate2 32 Site Preparation and Installation Figure 19 Centrifugal condenser electrical connections Field supplied unit disconnect switch when factory unit disconnect is not provided in unit Single or three phase electric service not by Emerson Field supplied 24V NEC Class 2 wiring to fan coil unit Factory installed disconnect switch Line voltage electric power supply conduit entrance Factory wired to components on electric panel Single or three phase electric service not by Liebert ioe Connection terminal for field supplied earth grounding wire Low voltage electric power supply
46. Connections Refer 5 5 5 Electrical Connections 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 A transformer is available for 277 VAC single phase applications 2 and 3 ton Control Connections Field supplied control wires must be connected between the evaporator and the condensing unit See Figure 16 and the electrical schematic on the units for more details Four wires are required between the evaporator and condensing unit 35 Liebert Mini Mate2 Site Preparation and Installation Figure 21 General arrangement air cooled condensing unit Liquid Injection Valve Bulb 3 8 SAE 45 Male Flare Suction Line Male Quick MCD or Atmospheric PFH Pressure Relief Valve Sight Glass Valve Recover pees ere gt Heater pe Liquid Line Male Quick Pressure l E Connect Coupling Limiting Pressure Balancing AA Switch Valve Liquid Line Female Quick Connect Coupling Use Liebert sweat adapter kit with field Field Piping hard piping or use Liebert pre charged AE gt 5 Expansion Valve line set Close coupling option gt Factory Piping available with MCD DPN000191 Rev 2 Evaporator Coil 5 8 Water and Glycol Cooled Condensing Unit NOTE Fol
47. ES FIELD INSTALLED A High Static Blower Assembly can be field attached to the evaporator to provide up to 2 0 51mm of external static pressure on the discharge side of the evaporator The blower box contains a centrifugal type double inlet blower This blower is equipped with a belt drive and 1 5 hp single speed motor mounted to an adjustable motor base Note Unit must be ordered without the internal direct drive motor and the high static blower disables the two speed fan operation feature Filter box kit for ducted applications includes filter box with duct flange connection one MERV 8 ASHRAE 52 2 2007 filter 20 x20 x4 508mm x 508mm x 102mm and a duct flange for use on the supply air opening of the unit Air Distribution Plenum includes molded plastic three way discharge plenum 16 x25 x4 406mm x 535mm x 102mm MERV 8 filter ASHRAE 52 2 2007 and sheet metal block off plates for covering the duct openings on the evaporator unit Plenum mounting requires T bar ceiling grid The Condensate Pump is field mounted external to the cabinet wired to the unit power block and is equipped with a check valve A secondary float can be field wired to shut down the unit upon high condensate level A Remote Temperature and Humidity Sensor package includes sensors in an attractive case with 30 ft 9 m 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
48. TABLES System configurations 60 HzZ eee een ee ee eee nnn 13 System configurations SBOH Ze tapene cc ee ERE eee cnet eee ene 13 Application limits evaporator and chilled water units 0 0 0 ccc cece eee ees 13 Application limits indoor and outdoor air cooled condensing units 0 0c eee eee 13 Application limits indoor water glycol cooled condensing units 0 0 00 cee cece eee 13 Celine unit welehtsouis untada do e a is taa 16 Cooling unit air flow at 0 8 IWG 75PA ESP o ooooooooooo nena 18 Recommended refrigerant line sizes cece eee nee 22 Pipe length and condenser elevation relative to evaporator 0 0 0 0 cee eee eee eee 22 Line charges refrigerant per 100 ft 30m of Type L copper tube o oooooooo o o 22 Refrigerant charge in Liebert pre charged R 407C line sets o o o oooooooooooomooo 22 Equivalent lengths for various pipe fittings ft M 0 naasa assanar eens 22 Refrigerant Charge 3 22 540 4 Seeding aoe la sew Fe Bye dees BAAN BOD RRs BRAS NG Bak 23 Connection sizes and torque 23 Net weights evaporator and chilled water units 0 0 0 0 cece cece 24 Net weight high static blower module 00 c ccc eee e nee nns 25 Indoor condensing unit airflow CFM at 0 5 iwg esp cc ees 31 Centrifugal condenser dimensions weights 0c 32 Dimensions and net weights air cooled outdoor condensing units 0 0c ee e
49. V 8 filter per ASHRAE 52 2 2007 1 The evaporator should be mounted above the bottom of the T bar supports with at least 30 in 762mm clearance from return air end to wall for replacing filter 2 Check the contents of the plenum kit 3 Follow the installation instructions included with the plenum kit R Connections for Ducted Systems NOTE Do not operate the unit without filters installed in the return air system In a ducted configuration the direct drive evaporator has a maximum allowable external static pressure of 0 3 wg 7 6 mm Use flexible ductwork or non flammable cloth collars to attach ductwork to the unit and to help control the transmission of vibrations to building structures Insulation of ductwork is vital to prevent condensation during the cooling cycle The use of 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 inside the duct Ductwork should be fabricated and installed in accordance with local and national codes Table 7 Cooling unit air flow at 0 3 IWG 75PA ESP 2 Ton 3 Ton Fan Speed CFM CMH CFM CMH High 885 1504 1250 2124 Low 800 1359 1000 1699 Piping Connections and Coolant Requirements The following pipe connections are required A drain line from the evaporator coil drain pan This line also se
50. W Ja H va au En moO Ter E Lar na E mr x Doe bado E ade y RETO aa 1i ia Il i L CB aE PE A e E Djs 30 sera Ll yO lt DO O la a hora O E Ora ei 3 E o La en En abi Ee og bau Zit gay 3 l eu 17 CIT AT FHL va COD syda TB2 4 Hot Gas Bypass TB1 3 Customer Alarm Connection 2 TB2 3 High Head Alarm Connection TB1 2 Customer Alarm Connection 1 TB2 2 Heat Rejection TB1 1 Customer Alarm Connection Common TB2 1 Heat Rejection TB3 4 Connection to TB3 Pin 4 of wall box TB1 9 Condensate Pump Aux Alarm TB3 3 Connection to TB3 Pin 3 of wall box TB1 8 Condensate Pump Aux Alarm TB3 2 Connection to T
51. Water 53 TAL THeating Operation e SMe Seas eek do 54 7 2 7 3 8 0 8 1 8 2 9 0 9 1 9 2 9 3 10 0 11 0 Humidity Controls rialari ahaa Gr sir E a Pa aera ack wink 4 a apt 55 7 2 1 Dehumidification Humidification Required 00 0 ccc eee nes 55 7 2 2 Dehumidification Operation Compressorized Direct Expansion DX Systems 55 7 2 3 Humidification Operation o 55 Load Control Features cias Sos A aise deg Sad 8G BAS ed ES AS 55 God COMMUNICA ON ii Resid Seta id Se de RES 55 ALARMAS se ad 56 Standard Alarms Definitions and Troubleshooting 56 Sate Custom Alarma taste sa dos ato isla Dane ot 56 8 1 2 sigh Head PressUr ees niinn a ea a e a ae da 56 8 1 3 Humidity Level esiin a a a a a e es 57 Sl A gt Temperature da aa pte cea Gk la i A 57 8 1 5 Humidifier Problem Alarm o o o oooooo teen e ene tenes 57 2126 Heb Water Alarmes yn hot Sins a rt aoe Ulett 8 57 SLD Losso POW A eee ae Bare a abe NS ana CR ne Ohara ae Bae Pay ee BA 57 SS Short Cy levc cue th ate a A A ta ae ase Reine aes gaan 58 Optional Custom Alarms srada naes aa a eee eee e ees 58 82T Change Filter 2 6 2 8 2 6 accel ta Dahle dd it de 58 8 2 2 High Temperature Sensor 0 0 0 0 cc eee eee nett eee nes 58 82 83 Smoke Detected omoes Da ee ae cel Ree i ae A ee Sees 58 SYSTEM TESTING AND MAINTENANCE 0 00 cee eee eee ee eee eee eee eee eee 59 System Testin
52. annel 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 SILENCE ALARM 55 Liebert Mini Mate2 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 TB1 1 through a normally open contact to either TB1 2 alarm 1 or TB1 3 alarm 2 The alarms can be enabled disabled refer to 6 0 Microprocessor 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 displa
53. axial 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 cleaned or replaced Regulating Valves 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 valve consists of a brass body balance spring valve seat valve disc holders capillary tube to discharge pressure and adjusting screw The water regulating valve is designed to begin opening at 180 psi 1240kPa and be fully opened at 240 psi 1655kPa The valve is factory set and should not need adjustment There is significant difference in the way standard pressure and high pressure valves are adjusted Consult Liebert Services 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 fr
54. bert 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 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 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 oth
55. bs Ji 2 Way Water Connect pS Liquid Line Coupling Es Regulating Valve Female Quick Connect Coupling Fluid Use Liebert sweat adapter kit with field Return hard piping or use Liebert pre charged line From Unit set Close coupling option available with a MCD Evaporator Coil Components are not supplied by Liebert Fluid Supply de but are recommended for proper circuit L FIELD PIPING To Unit Optional operation and maintenance DPNO000190 FACTORY PIPING REV 1 39 Liebert Mini Mate2 Site Preparation and Installation 5 9 5 9 1 Figure Optional Equipment Piping Free Cooling Coil The free cooling coil is a secondary coil located downstream of the DX coil The free coiling coil does not operate at the same time as the DX coil A temperature sensor is factory mounted to the free cooling piping If the water temperature is less than the set temperature usually 45 F 7 2 C the 3 way valve opens to allow chilled water flow to the free cooling coil and the compressor is locked off If the water temperature is above the set temperature the 3 way valve closes bypasses and enables the compressor To keep deposits from building up in the free cooling coil an adjustable timer is factory set to flush every 400 minutes NOTE If the free cooling coil is piped to an open water tower a CU NI copper nickel type coil must be ordered to prevent corrosion of the copper tubes or a heat exchanger mus
56. compressor in the unit If head pressure exceeds 400 psig 2785 kPa the switch opens the compressor contactor and sends an input signal to the control The high head pressure condition is acknowledged by pressing the alarm silence button on the wall box which will clear the alarm if the high head pressure condition no longer exists If the compressor is off for 1 hour the control goes into a special cold start mode In the cold start mode on a call for cooling or dehumidification the liquid line solenoid valve LLSV is energized If the high pressure switch does NOT trip within 10 seconds the control returns to normal operation of monitoring the high head pressure switch for three occurrences in a 12 hour period It is a rolling timer and after the third high head alarm occurs and is acknowledged by the user it will lock off the compressor If while in the cold start mode the high head pressure switch DOES trip within 10 seconds of the activation of the LLSV the control does not annunciate the alarm The control will turn off the LLSV and delay 10 seconds The control will permit this occurrence two more times or a total of 3 times If on the fourth try the high head pressure switch trips within 10 seconds the control will annunciate the alarm turn off the LLSV wait for the user to acknowledge the alarm and hold the compressor off for 3 minutes the length of the normal short cycle control The control will permit this occurrence three times
57. ction line and liquid line sizing based on lt 3 psi pressure drop in each and horizontal suction line refrigerant velocities gt 700FPM 3 6m s 2 Suction size should be reduced one pipe size for vertical riser sections to maintain suction line velocity gt 1000FPM 5 1m s for proper oil return Table 9 Pipe length and condenser elevation relative to evaporator Nominal Max Equiv Maximum PFH Maximum PFH System Size Pipe Length Level Above Level Below Tons ft m Evaporator ft m Evaporator ft m 2 150 45 40 12 15 4 6 3 150 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 20 ft 6m and or condensing unit installation is more than 15 ft 4 6m below the evaporator Contact Emerson Application Engineering for assistance Table 10 Line charges refrigerant per 100 ft 30m of Type L copper tube Line Size R 407C Ib 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 Table 11 Refrigerant charge in Liebert pre charged R 407C line sets Line Size in Length ft m Charge R 407C oz kg A 15 4 5 5 0 14 3 8 liquid 30 9 10 0 28
58. d Custom Alarm Messages WATER FLOW LOSS SMOKE DETECTED LOSS OF AIR FLOW HUMIDIFIER PROBLEM FILTER CLOG Custom Text To modify the two custom alarm messages select CUSTOM TXT Then select CUS TXT 1 or CUS TXT 2 Text can be up to 20 characters in length and can be either a blank space or any of the following alphanumeric characters and symbols y 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 a 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 again use the Up Down Arrows to select another character etc LCD Contrast The level of contrast due to the viewing angle of the Liquid Crystal Display 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 on the control board near TB1 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 In order to update the DIP switch settings power must be cycled Off then On from the unit disconnect switch Liebert Mini Mate2 48 Microprocessor Cont
59. 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 AC8 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 emergency Two common alarm relay outputs are available A built in LCD and RS 282 port for direct PC terminal connection provides two options for configuration and monitoring of the product The Lie
60. e Units supplied with the optional humidifier package have a 1 4 in 6 4 mm compression fitting with ferrule at the water supply connection Supply pressure range is 10 PSIG to 150 PSIG Required flow rate is 1 gpm A shut off valve should be installed in this line to isolate the humidifier for maintenance Assembly Instructions 1 Cut tube square and remove cutoff burr 2 Slide nut then sleeve on tube threaded end on nut facing end of tube 3 Insert tube into fitting seating it against stop shoulder and thread nut to body hand tight 4 With proper wrench tighten 1 1 4 to 2 1 4 turns NOTICE Risk of improper tightening of the piping fittings Can cause fitting damage and leaks that can result in building and equipment damage Do not over tighten the piping fittings Chilled Water Loop On chilled water units install manual service shutoff valves at the supply and return lines of each unit These shutoff valves are used for routine service or emergency isolation of the unit Chilled water supply and return lines must be insulated Insulating them will prevent condensation of the water supply and return lines to the unit The minimum recommended water temperature is 42 F Design pressure is 300psig 2068 kPag Connection sizes are 7 8 in 22 2mm OD copper for 3 ton units 19 Liebert Mini Mate2 Site Preparation and Installation Water Glycol Loop Emerson recommends installing manual service shutoff valves
61. e 2 Custom Alarm 1 0 Custom Alarm 2 6 High Temperature 30 Low Temperature 30 High Humidity 30 Low Humidity 30 Short Cycle 0 Loss of Power 0 Common Alarm Enable Each individual alarm can be selected to activate 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 is diverted after the alarm has been recognized If the alarm is completely 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 button again to select Yes or No 47 Liebert Mini Mate2 Microprocessor Control 6 15 6 15 1 6 16 Custom Alarms The custom alarm messages can be selected from a list of standard alarm messages or the operator may write his her own message A MAXIMUM OF TWO 2 ALARM MESSAGES CAN BE CUSTOMIZED The two custom alarm messages will initially display the previously programmed message but can be changed 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 or 2 Using the Up Down Arrows step through the list of five standard alarm messages listed below and two custom alarms Select the alarm message desired and store it by pressing Enter Standar
62. e setpoint for 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 set point to the desired temperature Humidification To check humidification set the humidity set point 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 set point to the desired humidity Dehumidification The dehumidification performance can be tested by setting the humidity set point at R H 10 below room relative humidity On cooling units with direct drive motor the compressor should turn on and the fan should switch to low speed Upon completion of testing return humidity set point to the desired humidity High Temperature Sensor Optional 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 when the inlet air temperature exceeds a preset point Smoke Detector Sensor While the smoke sensor is located in the unit the optional smoke sensor power supply is located in the electric panel It constantly samples return air through a tube No adjustments are required Remote Shutdown A connection point is provided for remote shutdown devices supplied by the custome
63. e space to be conditioned Ducted systems may be installed in a different room System Configurations The typical system configuration has a separate evaporator or cooling unit and a condensing unit Chilled water systems are self contained units Refer to Tables 1 and 2 and to Figures 8 9 and 10 for different system combinations and unit configurations that are possible Table 1 System configurations 60 Hz Condensing Unit Nominal Cooling Indoor Air Cooled Outdoor Air Cooled Indoor Capacity Unit Centrifugal fan Propeller Fan Water Glycol 2 Tons MM_24E MC_24A PFH_27A MC_26W STONE MM_36E MC_36A PFH_37A MC_38W MM_40C 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 3 Tons MM_35E MC_35A PFH_36A MC_37W MM_39C Self Contained Chilled Water Table 3 Application limits evaporator and chilled water units Input Voltage Range of Return Air Conditions to Unit Minimum Maximum Dry Bulb Temperature Relative Humidity 5 10 65 F to 85 F 18 C to 29 C 20 to 80 Unit will operate at these conditions but will not control to these extremes of conditions Table 4 Application limits indoor and outdoor air cooled condensing units Input Voltage Entering Dry Bulb Air Temperature Condensing
64. ecovered refrigerant NOTE Release of refrigerant to the atmosphere is harmful to the environment and unlawful Refrigerant must be recycled or discarded in accordance with federal 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 1 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 29 o gt Liebert Mini Mate2 66 System Testing and Maintenance 9 3 3 Replacing the Humidifier Canister A CAUTION
65. ectrical requirements A WARNING Risk of loose electrical wiring connections Can cause over heating of wire smoke and fire resulting in building and equipment damage serious injury or death Use copper wiring only Make sure that all connections are tight Voltage supplied must agree with the voltage specified on the unit name plate If a field supplied disconnect switch is 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 For 208VAC applications the low voltage transformer tap must be changed Refer to the electrical schematic An optional single point power kit is available for units that are installed close coupled This kit should be mounted inside the evaporator before installing the unit in the ceiling See Figure 17 Specific installation instructions are included with the single point power kit Control Connections A field supplied 4 wire 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 G
66. ed when a call for cooling occurs unless there is also a call for dehumidification Table 27 Cooling and dehumidification load response of hot gas bypass Situation Response Cooling only ON Dehumidification only OFF Cooling with Dehumidification OFF 53 Liebert Mini Mate2 System Performance Microprocessor Controls 7 1 3 Heating Operation Electric Heat or Hot Water The reheat stage is ACTIVATED when the temperature control calculates a requirement of 100 Conversely the reheat is DEACTIVATED when the heat requirement is 50 less than the activation point Ground Current Detector GCD A Ground Current Detector is factory installed on all 1 ton through 3 ton Liebert Mini Mate2 units with reheat The GCD detects reheat leakage current and shuts down operation of the reheat A steady green LED indicates that the reheat is operating properly A red LED indicates that the reheat has failed and both the reheat element and GCD need to be replaced A WARNING Do not remove or disable the ground current detector Failure to leave the GCD in place could result in smoke or fire Figure 30 Ground current detector Current Sensing Current Transformer BR Backup Contactor If Present RH Reheat Contactor Or SCR Control RH Contactor Or BR Contactor As Required 4 4 Reheat Assembly A WARNING Risk of heater element failure smoke and fire Can ca
67. ee 35 Net weight indoor water glycol cooled condensing unit 0 0 cece eee eee eee 37 View default setpoints and allowable ranges 0 cece eee enna 44 Microprocessor night and weekend setback ccc ect eee eens 45 Setup functions default values and allowable ranges 000 46 Alarm default time delays ooo 47 Switch settings wall box board 49 Equipment switch settings unit control board oooooooooororo rooms 49 Cooling and dehumidification load response of hot gas bypass oooooooooo o ooo 53 External static pressure avallable oooooooooroooororrrrr een e teens 61 Typical discharge presSure 0 ee cent eee e ees 61 DIP switch settings for humidifier control board 2 and 8 ton unit 0 0 00 ee eae 65 Troubleshooting uti ara dd tdi O44 ended 409 86 Bade 4d 69 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 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 loca
68. ee Pee ka oe 9 3 5 Free Cooling sei tc as A ee e A e ae me lates a a LB EAM e ak Ne 10 3 6 Optional Configurations Prop Fan Condensing Units 0 0 cece ee ees 10 3 7 Optional Configurations Water Glycol Condensing Units 0 0 cece ees 10 3 8 Optional Configurations Chilled Water Units 0 0 0 0 ccc ees 10 4 0 SHIP LOOSE ACCESSORIES FIELD INSTALLED 0000 e cece eee neeeaeunuae 11 4 1 Remote Monitoring Autochangeover and Leak Detection Equipment 12 5 0 SITE PREPARATION AND INSTALLATION 00000 cece cence eee eee eee eee 13 5 1 Installation CONSTA AAA o atti valde ae ee ae cae ae ae Marea ete 13 DLL System Configurations x sick bees eae hh oper bunk a eas ia bis beh eee da 13 91 2 Room Preparate Od e ERR IEA PE BETA DS 14 5 1 8 Location Considerations 0 0 0 000 ee ee eee eee eens 14 5 2 Celine Uat Wer O cme MMe che a bills ce Pete dd 16 5 3 Equipment Inspection Upon Receipt 0 0 ee eee teen eens 16 5 4 Packaging Material ee Bot a La ee neo a ada eee ed ee eo de od ceo 16 5 5 Installing the Ceiling Unides a A A ara 16 5 5 1 Close Coupled Installations ce eee e teens 17 5 5 2 Evaporator Air Distribution 17 5 5 3 Piping Connections and Coolant Requirements 18 5 5 4 Condensate Pump Kit Installation All Units ooooooooocoocrcorororoooooooo 27 5 5 5 Electrical Connections 27 5 6 5 7 5 8 5 9 5 10 6 0 6 1 6 2 6
69. en selected from control panel Open wiring or failed board Verify LOW FAN is displayed at the control panel Check for 24 VAC 2 VAC at terminals P3 4 and P1 9 If no voltage check wiring and or replace interface board Check fan relays Fan will not operate at low speed during dehumidification Temperature requirement is too high Verify with display Cooling requirement overrides Dehumidification Cooling cycle too short Display freezes and control pads do not respond Sensor response delay too short Static discharge Increase sensor response delay See 6 11 Calibrate Sensors 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 Temperature display will indicate dashes Check wiring from Continuous Failed temperature temperature humidity board remote sensors to the control board or Cooling sensor from control board to wall box Replace temperature humidity circuit board remote sensors or wall box Continuous Heating Shorted wiring or failed Dehumidification Humidification control board Check wiring and or replace control board Display Problem Incorrect wiring
70. er damage Emerson recommends installing leak detection equipment for unit 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 A 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 NOTICE Risk of a leaking coil due to freezing and or corrosion Can cause equipment and serious 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
71. er 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 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 Liebert Mini Mate2 12 Site Preparation and Installation 5 0 SITE PREPARATION AND INSTALLATION 5 1 5 1 1 NOTE Before installing unit determine whether any building alterations are required to run piping wiring and ductwork Carefully follow all unit dimensional drawings and refer to the submittal engineering dimensional drawings of individual units for proper clearances Installation Considerations The evaporator unit is usually mounted above the suspended ceiling of th
72. g 4 000 24 5 usd tw Bd oo ted BRO ee UA A CaS hs Be A aa 59 9 1 1 Environmental Control Functions 0 0 0 000 cc teen eee eens 59 91 25 COMA Td AA alley Gaede ce de pale att ne Soe Sede ahs as 59 DAS SLC AA he gio rng a a Papa tn dee Siete ge a eae Te a E hex ete tales Sadr wane WHS ise ca 59 DEA Humidificatione cai dt Meee aap ied A A a 59 9 1 5 Dehumidification 0 0 eee nee e eens 59 9 1 6 High Temperature Sensor Optional 0 0 0 ccc eee eee e eens 59 9 1 7 Smoke Detector Sensor 59 9 1 8 Remote Shutdown i e ati Bete ii Hark Bee Ree eee he Rab ie ews 59 Maintenance on 2 42443 ie da eet Dales basse Baleares Dead 60 921 7 Electric Panel os a ova e ays GON aia cota eE INTER 60 QD D gt RETA aca E Seis weeds hace eas sg a ears heigl Beis hos 60 9 2 3 Direct Drive Blower Package eee ee eee eens 60 9 2 4 High Static Belt Drive Blower Package Option 0 00 61 9 2 5 Refrigeration System 0 0 0 i aa aai A ee eee Aa ence een e e s 61 9 2 6 Humidifier Circuit Board Adjustments 0 0000 ccc eee ene e eens 64 Replacement Procedures rine chic abide A Qa dee BERS Ba aE Bs 65 9 3 1 Compressor Replacement 65 9 3 2 gt Electrical Fal re suzan sia eos awe A ae a is ae a a 66 9 3 8 Replacing the Humidifier Canister 0 20 0 0 ccc ce cee eee eens 67 MAINTENANCE INSPECTION CHECKLIST 000 cece e ee eee eee eee ee eee eee 68 TROUBLESHOOTING 0200 A A AR ee e ee ie OO 69 iii
73. hanical problem A WARNING Risk of explosive discharge of high pressure refrigerant Can cause serious injury This unit contains fluids and gasses under high pressure Relieve pressure before working with piping connections Mechanical Failure If a mechanical failure has occurred the compressor must be replaced If a burnout occurs correct the problem and 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 65 Liebert Mini Mate2 System Testing and Maintenance 9 3 2 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 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 and equipment Use a filter drier when charging the system with r
74. he entire unit 8 2 3 Smoke Detected The smoke detector senses the return air shuts down the unit upon detection and sends visual and audible alarm This smoke detector is not intended to function as or replace any room smoke detection system that may be required by local or national codes Locate source of smoke and follow appropriate emergency procedures Liebert Mini Mate2 58 System Testing and Maintenance 9 0 SYSTEM TESTING AND MAINTENANCE 9 1 9 1 1 9 1 5 9 1 7 This section describes system testing maintenance 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 Line side of factory disconnect remains energized when factory disconnect is Off System Testing Environmental Control Functions The performance of all control circuits can be tested by changing the setpoints which actuates each of the main functions Cooling To test the cooling function set the set point 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 th
75. ice is not provided with the condenser unit the system installer must provide and install a discharge pressure relief valve per local and national 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 electrical enclosures CAUTION Risk of contact with hot surfaces Can cause injury The compressors 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 compressors discharge lines humidifiers and reheats 1 Liebert Mini Mate2 Important Safety Instructions A CAUTION Risk of leaking water Can cause equipment and building damage This unit requires a water drain connection It may also require an external water supply to operate Improper installation application and service practice can result in water leakage from the unit Water leakage can result in severe property damage and loss of critical data center equipment Do not locate unit directly above any equipment that could sustain wat
76. l and national building electrical and plumbing codes 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 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 local and national 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 dev
77. l Outlet Connection de al Dia ectrical Entrance Extends 3 1 2 88 9mm beyond l panel exterior for High Voltage Connection Suction Line Male Quick Connect Liquid Line Male Quick Connect 7 8 22mm Dia Electrical Entrance for L w Voltage PIPING CONNECTIONS DPN000208 Connection Rev 4 Table 20 Net weight indoor water glycol cooled condensing unit Model Weight 60Hz 50Hz Ib kg C Me2ew 175 79 MC 38W MC 37W 220 100 Source DPNO00208 Rev 4 37 Liebert Mini Mate2 Site Preparation and Installation 5 8 2 5 8 3 Electrical Connections Refer to 5 5 5 Electrical Connections for general wiring requirements and cautions Refer to electrical schematic when making connections Refer to specifications for full load amp and wire size amp ratings Control Connections A 4 wire control connection is required from the evaporator unit to the condensing unit Glycol cooled units also require a two wire control connection to the drycooler and pump package Piping Connections Details for refrigerant R 407C loop piping are in 5 5 3 Piping Connections and Coolant Requirements Water Glycol Piping Considerations Manual service shutoff valves should be installed at the supply and return line to each unit This enables routine service and or emergency isolation of the unit When the condensing unit fluid quality is poor filters that can be easily serviced shou
78. lay 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 3 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 ON then resetting power to the unit Liebert Mini Mate2 46 Microprocessor Control 6 11 6 12 6 13 6 14 Calibrate Sensors The temperature and humidity sensor can be calibrated by selecting the CALIBRATE SENSORS menu item The temperature sensor can be calibrated 5 F 2 8 C 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 selected 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
79. ld be placed in the supply line These filters extend the service life of the condensing unit Condensing Unit Fluid Requirements The maximum fluid pressure is 150 PSI standard pressure and 350 PSI for high pressure units refer to unit nameplate and model number description page at beginning of this manual The water cooled system will operate in conjunction with either a cooling tower or city water Glycol cooled systems will operate in conjunction with a cooling tower city water or drycooler Automotive anti freeze must not be used in glycol systems Prepare glycol solution using customary practices Regulating Valve Water Glycol cooled units include a coolant flow regulating valve which is factory adjusted and should not need field adjustment Standard pressure and high pressure valves are adjusted differently Contact Emerson Network Power Liebert Services before making any adjustments Liebert Mini Mate2 38 Site Preparation and Installation Figure 23 General arrangement water glycol split systems Scroll Compressor Tube in Tube Condenser Suction Line Male Quick Connect Coupling Suction Line Female Quick Connect Coupling Tube in Tube Condenser r Return Line Sensing Bulbo Water Glycol External Equalizer A Liquid Injection a je Supply Line Valve po oe te 2 Service Access eae Fluid Supply ES To Unit Liquid Line UT a Ls Valves SO a Male Quick Hose Bi
80. low all national and local building electrical and plumbing codes 5 8 1 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 unit should be located away from personnel Normal operating sound may be objectionable if the condensing unit is placed near quiet work areas Refer to Table 9 for maximum refrigerant line lengths To mount the unit in the ceiling refer to 5 5 Installing the Ceiling Units Liebert Mini Mate2 36 Site Preparation and Installation Figure 22 Cabinet dimensions and piping data water glycol indoor condensing module 8 7 8 225mm 14 356mm 50 1 4 1276mm Overall Cabinet Overall Dimension Dimension 48 1 4 1225mm 12 305mm Threaded Rod Centers Threaded Rod Centers 3 7 8 98mm 8 7 16 214mm 46 1 2 1181mm Cabinet Dimension at 22 1 2 572mm Cabinet Dimension Customer Supplied Threaded Rods for Module Support from Ceiling typ 4 Minimum Clearance 33 838mm this side for component access Holes for Module and removal Rigging typ 2 each end Note Integral Unit is spaced evenly in Hanging reference to threaded rod centers Bracket DIMENSIONAL DATA 7 8 22 2mm OD CU Water Glycol Inlet Connection Extends 3 1 2 88 9mm beyond 7 8 22 2mm OD CU panel exterior Water Glyco
81. lycol cooled units also require a two wire control connection to the drycooler and pump A 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 circuit breaker contained in the transformer housing is sized only for the factory supplied control system Additional control wiring will be required if your system includes other optional monitoring and control devices NOTE Refer to specifications for full load amp and wire size amp ratings Liebert Mini Mate2 28 Site Preparation and Installation Figure 16 Evaporator and chilled water unit electrical connections Remote Control Panel Connection to TB3 1 2 3 4 connected with field supplied thermostat wire 22ga shielded jacketed available from Emerson or others Unit Control Board terminals marked GND 5V T T must be connected to corresponding terminals on Remote Control Wall Box Common alarm connection Field supplied 24V Class 2 wiring to common alarm conn TB1 6 and TB1 7 Site monitoring connection Terminals TB4 1 TB4 2 are for connection of a 2 wire twisted pair communication cable available from Emerson or others to optional Liebert SiteScan Customer remote alarm connection field supplied 24V Class 2 wiring to co
82. n the unit to make sure the pump works properly Operate the pump and check the drain line and discharge line for leaks Correct as needed NOTE 3 4 flexible rubber tubing assembly supplied with pump kit must be installed on pump end of rigid piping field provided and supported as required Electrical Connections Each unit is shipped from the factory with internal wiring completed Refer to electrical schematic when making connections Electrical connections to be made at the installation site are A WARNING Arc flash and electric shock hazard Open all local and remote electric power disconnect switches and wear protective equipment per NFPA 70E before working within the electric control enclosure Failure to comply can cause injury or death Unit contains hazardous voltage electric power Line side of factory disconnect remains energized when factory disconnect is Off e Power supply to each ceiling unit Control wiring between the evaporator unit and the condensing unit if applicable Control wiring between the control panel wall box and the evaporator unit control board Entrance locations for these connections are noted on drawing in each installation section 27 Liebert Mini Mate2 Site Preparation and Installation Power Connections All power and control wiring and ground connections must be in accordance with the National Electrical Code and local codes Refer to electrical schematic on unit for el
83. ng Units 5 6 2 Electrical Connections Refer to 5 5 5 Electrical Connections for general wiring requirement and cautions Refer to the unit s electrical schematic when making connections Refer to the unit s specifications for full load amp and wire size amp ratings Liebert Mini Mate2 30 Site Preparation and Installation 5 6 3 5 6 4 Piping Connections Details for refrigerant R 407C loop piping are in 5 5 3 Piping Connections and Coolant Requirements Ducting The total external static pressure for the inlet and outlet ducts including grille must not exceed 0 5 inches of water General Considerations Use flexible ductwork or nonflammable cloth collars to attach ductwork to the unit and to control vibration transmission to the building Attach the ductwork to the unit using the flanges provided Locate the unit and ductwork so that the discharge air does not short circuit to the return air inlet Ductwork that runs through a conditioned space or is exposed to areas where condensation may occur must be insulated Ductwork should be suspended using flexible hangers Ductwork should not be fastened directly to the building structure For multiple unit installations space the units so that the hot condensing unit exhaust alr 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 discha
84. nn TB1 1 TB1 2 amp TB1 3 6 III o Remote unit shutdown Replace existing jumper between Terminals TB 1 4 8 TB1 5 Heat rejection connection Field supplied 24V NEC class 2 wiring See note 2 Entrance for customer with normally closed switch having a Optional condensate For remote air cooled units from low voltage connections minimum 75VA rating Use field supplied pump aux float switch terminals TB2 1 2 3 amp 4 in the 24V Class 1 wire connection to term Fan Coil module to wires 1 2 38 4 TB 1 8 amp TB1 9 in the condensing module Remote Humidifier Contact 1 24V GND Field Supplied 24V class 2 2 24V Supply wiring to terminals 11 amp 12 3 High Pressure Alarm OPT located in field wire 4 Hot Gas Bypass Connection compartment Earth ground connection Field supplied unit disconnect Connection terminal for field switch when factory unit disconnect supplied earth grounding wire High Voltage Power Connections Electric service connection terminals switch is not supplied Factory installed Electric service not by Emerson disconnect switch x Entrance for Customer High Voltage Connections al Electrical entrance for optional condensate pump WN NJ Drycooler Circulating pump control circuit TB70 71 Optional w Econ O Cycle models Use field supplied 24V Class 2 wire NOTES 1 Refer to specification sheet for full load amp and wire size amp ra
85. nt 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 set point Boiling soon commences and the canister operates normally 2 Ifthe conductivity of the water is low the canister fills and the water level reaches the canister full electrode before the amperage set point 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 is permitted until then 3 When full output is reached the circuit board starts a time cycle which is 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 th
86. ntrol 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 unusual noise Inspect all piping connections for leaks during initial operations Correct as needed Drain pan is installed under ducted cooling unit and ceiling mounted condensing unit Rubber band is removed from evaporator condensate pan float switch Liebert Mini Mate2 42 Microprocessor Control 6 0 MICROPROCESSOR CONTROL 6 1 The Microprocessor Control for the Liebert Mini Mate2 features an easy to use menu driven liquid crystal 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 1 0 key after power is applied To turn the unit OFF press the ON OFF 1 0 key before power is disconnected The following control keys may be used to move through the menus as prompted on the LCD On Off 1 0 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 val
87. o minimize leaks and should not contain ventilation grilles Location Considerations A CAUTION Risk of leaking water glycol Can cause building and equipment damage Do not mount units over equipment and furniture that can be damaged by leaking water glycol Install a watertight drain pan with a drain connection under the cooling unit and water glycol condenser unit Route the drain 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 NOTE Do not mount units in areas where normal unit operating sound may disturb the working environment Install 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 such as smoke detectors etc to the housing as they could interfere with the maintenance or service NOTE Temperature and humidity sensors are in the wall box Install the wall box where discharge air DOES NOT blow directly on the sensors When using the optional air distribution plenum avoid locating the evaporator unit in confined areas that affect the air flow pattern Such locations could cause short cycles downdrafts and air noise Avoid locating the unit in an alcove or at the extreme end of a long narrow room Avoid installing multiple units close to each other This could result in cros
88. ol a humidifier outside the unit Power to operate the remote humidifier does not come from the Liebert Mini Mate2 Available on units with or without internal humidifier Sensors Smoke Sensor checks return air shuts down the unit upon sensing smoke and activates visual and audible alarms at the wall box display This smoke sensor is not intended to function as or replace any smoke sensor system that may be required by local or national codes High Temperature Sensor senses the return air temperature and shuts down unit if the 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 senses pressure drop across the filters and activates visual and audible alarms at the wall box display The wall box display annunciates the alarm 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 Direct Drive blower can be factory eliminated from the evaporator chilled water cabinet for high static applications 0 9 to 1 5in 23 to 88mm w g See 4 0 Ship Loose Accessories Field Installed for the optional externally mounted high static blower assembly 9 Liebert Mini Ma
89. om a water treatment specialist plus a regular maintenance program schedule It is important to note that improper use of water treatment chemicals can cause more severe problems than simply using none 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 Operation 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 supe
90. ondensing unit System components are pre charged with refrigerant and can be connected together with optional pre charged line sets or optional sweat adapters for field refrigerant piping Easy to Service Low maintenance components are easily accessed through removable front panels Spare parts are always in Emerson inventory and available on short notice Advanced Control Technology A menu driven microprocessor control system provides precise temperature and humidity control and accurate alarm setpoints Using touch sensitive buttons the wall mounted monitor control panel allows you to select and display temperature and other monitored parameters High Efficiency High sensible heat ratio scroll compressor and precise microprocessor control allow the system to operate efficiently 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 reliability Components include a rugged scroll 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 UL 1995 for Heating and Cooling Equipment and are marked with the CSA c us logo Location When considering installation locations consider that these units contain water and
91. ons 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 and ASTM 1338 standards Chilled water models are self contained and include a chilled water coil two speed direct drive centrifugal blower factory mounted disconnect switch and two way slow close motorized valve Design pressure is 300psi 2068kPa 60psi 414kPa close off differential 7 Liebert Mini Mate2 Standard Features 2 amp 3 Ton Systems 2 4 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 crystal display An eight key membrane keypad for setpoint program control unit On Off fan speed 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 fan speed 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 po
92. or and chilled water unit electrical connections 0 00 eee eee 29 Close coupled installation 0 0 0 000 ccc cence eet een nes 30 Indoor air cooled centrifugal condenser dimensions and pipe connections 6 32 Centrifugal condenser electrical connections 0 0 0 cee ee eens 33 Cabinet and floor planning dimensional data outdoor condensing unit 00005 34 General arrangement air cooled condensing unit saasaa asare 36 Cabinet dimensions and piping data water glycol indoor condensing module 37 General arrangement water glycol split systems 1 0 0 ee ee een 39 Optional free cooling coil 8 way valve on water glycol units o oooooooooooooooo 40 Optional hot water reheat two way Valve 41 Control key locations all mounted display boX ooooooooo or 43 Control ME s 2 454 A a A RA he bid esl bt eek tak Blea mete at apa Ta 51 Control board inside evaporator 0 0 0 cee e nett eens 52 Wall box board om aratan 2LO4 debe deaeked anand a tad 52 Ground current detector 54 Hot gas Dy passin tii A it bb bah ERAS oar od hoe hos 63 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 Table 25 Table 26 Table 27 Table 28 Table 29 Table 30 Table 31
93. p Down Arrow to scroll through the submenu Press Enter to select a particular function Restart Time Delay This function delays unit restart after main power is restored 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 to 9 9 minutes 6 to 594 seconds Setting the value to zero 0 will prevent unit restart when power is restored In this case the unit must be restarted manually by pressing the ON OFF button on the keypad 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 Down Arrow to change the value Press Enter to store the value 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
94. pproximately 3 to 6 PSIG 21 to 41kPa on the evaporator due to the differential on the hot gas bypass 8 Return temperature setpoint to the desired setting Figure 31 Hot gas bypass External Equalizer Discharge Bypass Valve Catch All Receiver External Equalizers Compressor 63 Liebert Mini Mate2 System Testing and Maintenance 9 2 6 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 an amperage set point 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 when a manual drain sequence is required such as during service The electronic control board for the humidifier is also located in the humidifier assembly When the unit is energized power is available to humidifier Operations 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 setpoi
95. r This terminal strip is located on the printed circuit board Terminals TB1 4 and TB1 5 are fitted with a jumper when no remote shutdown device is installed 59 Liebert Mini Mate2 System Testing and Maintenance 9 2 9 2 1 9 2 2 9 2 3 Maintenance 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 can be replaced by opening either the hinged door on the return air filter box or the return air grille plenum version only Replacement filters are commercially available in several efficiencies Direct Drive Blower Package Monthly inspection of the blower package include motor mounts fan bearings and impellers Fan Impellers and Motor Bearings Fan impellers should be thoroughly inspected and any debris removed Check whether they are tightly mounted on the fan shaft and do not rub against the fan housing during rotation Although the unit s motor bearings are permanently sealed and self lubricating they should be inspected monthly for signs of wear For units with the optional belt drive motor blower the drive belt should be checked monthly for signs of wear and proper tension Pressing on belts midway bet
96. r than the dimensions of the condensing unit base For snowy areas a base of sufficient height to clear snow accumulation must be installed Figure 20 Cabinet and floor planning dimensional data outdoor condensing unit 4 Removable right panel Fan Rotation for access to ict aa Moa refrigeration component eft side y Right Air Discharge Left Air Intake Shaded area indicates a minimum clearance of 18 457mm for proper air flow Shaded area indicates a recommended clearance of 24 610mm for component access and Shaded area removal indicates a minimum Removable panel for access clearance of 18 457mm to high voltage and low voltage for proper air flow connections and refrigeration DPNO00130 components Rev 1 Liebert Mini Mate2 34 Site Preparation and Installation 5 7 2 5 7 3 Table 19 Dimensions and net weights air cooled outdoor condensing units Model Numbers Dimensions inches mm Module Net Weight 60Hz 50Hz A B C Ib kg PFHO27A L 40 1016 23 1 2 597 18 457 200 91 PFHO27A H PFHZ27A L 48 1219 31 787 18 457 241 109 PFHO37A L PFHO36A L PFHO37A H PFHO36A H 53 1343 36 1 4 918 18 457 351 159 PFHZ37A L PFHZ36A L Source DPN000130 Rev 1 Piping Connections Details for Refrigerant R 407C Loop piping are in 5 5 3 Piping Connections and Coolant Requirements Electrical
97. re Sensor Figure2 Model number nomenclature Air cooled indoor condensing units MC Liebert Mini Mate2 indoor condensing units D Disconnect Switch 0 No Disconnect Switch Nominal Capacity 24 2 ton 60Hz 35 3 ton 50Hz 36 3 ton 60Hz Cooling Method A Air Cooled 36 A L Head Pressure Controls Y L Liebert Lee Temp Receiver MC D Supply Power P 208 230V 1 ph 60Hz X 277V 1 ph 60Hz S 220V 1 ph 50Hz 3 ton only A 460V 3 ph 60Hz 3 ton only Y 208 230V 3 ph 60Hz 3 ton only M 380 415V 3ph 50Hz 3 ton only Refrigerant 7 R 407C A H 7 I Hot Gas Bypass Liebert Mini Mate2 Product Number Nomenclature Figure 3 Model number nomenclature Outdoor air cooled prop fan condensing units PF Prop Fan Condensing Unit with Hot Gas Bypass Refrigerant ae CaaS Level Nominal Capacity kBtuh 7 R 407C ces PFH 0 37 A P L 7 Standard Coil L 95 F Ambient C Coated Coil P 208 230V 1ph 60Hz Liebert Lee Temp Y 208 230V 3ph 60Hz 3 ton only H 105 F High Ambient B 575V 3ph 60Hz 3 ton only S 220V 1ph 50Hz 3 ton only M 380 415V 3ph 50Hz 3 ton only Figure 4 Model number nomenclature Water glycol cooled condensing units Supply Power MC Liebert Mini Mate2 Nominal Capacity P 208 230V 1 ph 60Hz indoor condensing 26 2 ton 60Hz X 277V 1ph 60Hz units 37 3 ton 50Hz S 220V
98. re charged line sets maximum combined length of 45 13 7m close coupling the units together using the quick connects See Figure 17 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 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 with 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 NOTICE Risk of twisted or kinked piping Can cause flow restriction or leaks Handle the pre charged lines with care so they do not get kinked or damaged Use tube benders and make all bends before making connections to either end Coil any excess tubing in a horizontal plane with the slope of the tubing toward the condensing unit Liebert Mini Mate2 20 Site Preparation and Installation Field Fabricated Piping All field fabricated refrigeration piping should use copper pipe with high temperature brazed joints A brazing alloy with a minimum temperature of 1350 F 732 C such as Sil Fos Avoid soft solders such a
99. reshold point factory set at 85 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 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 This allows for maintenance scheduling 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 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 The printed circuit board contains hazardous voltage Use e
100. rge 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 Table 17 Indoor condensing unit airflow CFM at 0 5 iwg esp 2 Ton 3 Ton 1000 1430 31 Liebert Mini Mate2 Site Preparation and Installation Figure 18 Indoor air cooled centrifugal condenser dimensions and pipe connections A Customer Supplied 22 3 4 578 30 114 1276mm real reno Threaded Rods Overall Dimension 24 112 546mm for Module Support 46 1 2 1181mm a imension from Celling typ 4 Cabinet Dimension 19 112 495mm c 48 1 4 1225mm alo Rod Threaded Rod Centers Centers D Arnet 20 3 4 Duct Connection 527mm Z El mm 519m gt Z Dinerson Collet EA B7 Nic Out ri 2 2 Duct Dimension 30 1 8 ean Blower Motor Service Access Holes for Module Ol Inet Panel on
101. rheat 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 operation higher superheats 50 60 F 19 15 C may be observed at the compressor The liquid quenching valve is internally equalized and superheat is not adjustable Liebert Mini Mate2 62 System Testing and Maintenance 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 are 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 a
102. rol Table 25 Equipment switch settings unit control board Switch OFF Position ON Position 1 Compressor Chill Water 2 Staged Reheat SCR Reheat 3 Not Used Must remain in OFF position 4 Not Used Must remain in OFF position 5 Enable Reheat Disable Reheat 6 Enable Humidifier Disable Humidifier 7 Enable Dehumidifier Disable Dehumidifier 8 Electric Reheat Gas Reheat Table 26 Switch settings wall box board Switch OFF Position ON Position Disable Beeper Enable Beeper 2 Not Used Must remain in OFF position 3 Not Used Must remain in OFF position 4 Not Used Must remain in OFF position 5 Not Used Must remain in OFF position Compressor on continuously for tight control Economy Mode Disable Setback Enable Setback Enable Password Disable Password 49 Liebert Mini Mate2 Microprocessor Control 6 17 Run Diagnostics Available On Rev 1 001 0 and Higher 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
103. rves as the drain for the optional humidifier A drain line from the secondary drain pan beneath the unit A water supply line to the optional humidifier if applicable Refrigerant piping connections between the evaporator unit and the condensing unit air water or glycol If the evaporator unit is chilled water connections to the building chilled water source are required Drain Line NOTICE Risk of water backing up in the evaporator coil drain line Can cause building and equipment damage from overflowing water 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 A 3 4 in 19 1 mm NPT female connection is provided for the evaporator coil condensate drain This line also drains the humidifier if applicable The 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 operation if drain becomes blocked Liebert Mini Mate2 18 Site Preparation and Installation The optional condensate pump kit is required when the evaporator is installed below the level of the gravity fed drain line NOTE Remove any shipping band from the float switch in the evaporator pan before operating unit Humidifier Water Supply Lin
104. s 50 50 or 95 5 1 Use sweat adapter kit matched to the Liebert Mini Mate2 and outdoor condensing unit refrigerant connection sizes 2 Measure pipe runs and calculate pipe size and equivalent feet of suction and liquid lines per Tables 8 and 12 3 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 completed lines at approximately 150 psig 1034kPa pressure Evacuate each line twice to 250 microns Break the vacuum each time with clean dry nitrogen Evacuate the lines a third time to 250 microns See Quick Connect Fittings on page 23 for the proper procedure to connect lines to each unit of the split system 8 Add refrigerant R 407C to the completed system as calculated per Table 10 for both liquid and suction line sizes used Tm oS When installing remote condensing units above the evaporator the suction gas line should be trapped at the evaporator This trap will retain refrigerant oil during the Off cycle When the unit starts oil in
105. sing air patterns uneven loads and competing operating modes When installing an air cooled or water glycol cooled unit inside a space ensure that national and local codes are met for refrigerant concentration limits that might vary with building type and use Liebert Mini Mate2 14 Site Preparation and Installation Figure8 Air cooled systems 2 and 3 tons Split System Evaporator Supply and Return Air Ducted Indoor Air cooled Condensing Unit Split System Evaporator Supply and Return Air Plenum Indoor Air cooled Condensing Unit SS iy WINN Y Al r Split System Evaporator Split System Evaporator Supply and Return Air Ducted Supply and Return Air Plenum Outdoor Air Cooled Condensing Unit Outdoor Air Cooled Condensing Unit Figure 9 Water glycol cooled systems 2 and 3 tons Split System Evaporator Split System Evaporator Supply and Return Air Plenum Supply and Return Air Ducted Remote Water Glycol Condensing Unit Remote Water Glycol Condensing Unit Condensing Unit Condensing Unit Evaporator Evaporator Cooling Cooling Tower Tower Split System Evaporator Split System Evaporator Supply and Return Air Plenum Supply and Return Air Ducted Remote Water Glycol Condensing Unit Remote Water Glycol Condensing Unit Figure 10 Chilled water systems 3 tons Chilled Water Supply and Return Plenum 15 Liebert Mini Mate2 Site Preparation and Installation 5 2 5 3 5 4
106. sword 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 normal fan speed low fan speed and active alarms The Status Display may also be selected from the Main Menu 43 Liebert Mini Mate2 Microprocessor Control 6 2 Main Menu lt Menu gt Press the MENU key to display the Main Menu The Menu selections in the following order include SETPOINTS CALIBRATE SENSORS STATUS ALARM ENABLE ACTIVE ALARMS ALARM TIME DELAY TIME COMMON ALARM ENABLE DATE CUSTOM ALARMS SETBACK CUSTOM TEXT SETUP OPERATION DIAGNOSTICS SETPOINT PASSWORD END OF MENU SETUP PASSWORD Use the Up Down arrow to scroll through the selections When ready to select a particular function press Enter 6 3 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 Down arrow then press Enter to select a particular function To change a particular value press Enter and use the Up Down arrows to change the value When the value has been changed press Enter to store the value For
107. t sides of plenum Dimension Air Discharge out sides of plenum Air Inlet through grille in center of plenum Optional Air Distribution Plenum DPN000193 All piping and electrical field connections are the same Rev 3 Table 15 Net weights evaporator and chilled water units Model 60Hz 50Hz Weight Ib kg MM 24E 225 102 MM 24K 245 111 MM 36K MM 35K 245 111 MM 40C MM 39C 230 104 Source DPN000193 Rev 3 MM 36E MM 35E 225 102 Liebert Mini Mate2 24 Site Preparation and Installation Figure 14 Dimensions evaporator units with optional belt drive blower assembly 16 13 16 427mm Threaded Rod Centers 19 483mm LT Threaded Rod Centers Blower Box Dimension High Static Blower 9 3 4 Outlet 248mm 5 7 8 149mm 6 7 8 175mm 6 5 16 160mm Outlet 4 29 32 125mm Threaded Rod To Threaded Rod 3 7 32 82mm Base to Base Table 16 Net Weight Unit Ib kg High Static Blower Module 85 39 Source DPN000194 Rev 3 29 7 8 759mm Threaded Rod Centers Module oi en 54 1372mm 30 762mm Blower Box 4 29 32 125mm Cabinet to Cabinet Cabinet Dimension Net weight high static blower module 55 13 16 1418mm 57 13 16 1468mm Overall Dimension Oa es TT 24 610mm Cabinet Dimension 7 a 30
108. t separate the tower water from the free cooling loop On water cooled systems the free cooling coil outlet can be field piped to the condensing unit inlet provided a 3 way regulating valve has been installed within the water glycol condensing unit see Figure 24 24 Optional free cooling coil 3 way valve on water glycol units Bleed Valve Fluid Return From Unit Fluid Condenser I ani aa Fluid upply ree BQIMa Return To Unit Coil i rom Shutoff f E Unit Valves Sy a a ca Z Z S Bi p Hose a de ag Shutoff Z 3 Way Water Bib als L A Valves ae 2 Fluid Regulating IDS g lL o es a A oO Se _ Bl pa a Supply Valve Mo ee ee ee 4 To Unit Optional NOTE RECOMMENDED PIPING FOR UNITS FIELD PIPING WITH FREE COOLING COIL OPTION TR FACTORY PIPING AND WATER GLYCOL CONDENSER Components are not supplied by Emerson but are recommended for proper circuit DPN000219 operation and maintenance Rev 3 Liebert Mini Mate2 40 Site Preparation and Installation 5 9 2 Hot Water Reheat Coil Building hot water can be piped to a factory installed hot water reheat coil located downstream of the cooling coil A factory installed solenoid valve opens upon a call for reheat Figure 25 Optional hot water reheat two way valve Bleed Valve Hot Water Reheat Control Water Water Supply Return To Unit 9 Hot Water From Unit f A Reheat dl e Coil L ee OW gl E EA e
109. tactor Cool Compressor contactor HGBP Hot gas bypass valve e Reheat Reheat contactor Common Alarm Common alarm relay NOTE Fan turned on with all loads Test Control Board By selecting this function the microcontroller will perform a self test lasting approximately 10 seconds When the test is complete the display will show the ROM checksum ROM part number and firmware vision number Liebert Mini Mate2 50 Microprocessor Control Figure 27 Control menu Status Display 75 F 50 RH NO ALARMS Menu Setpoints Status Active Alarms Time Date Setback Setup Operation Setpoint Password Setup Password Calibrate Sensors Alarm Enable Alarm Time Delay Common Alarm Enable Custom Alarms Custom Text Diagnostics End of Menu Setpoints Setup Temp Setpt Temp Sens Hum Setpt Hum Sens Hi Temp Alm Lo Temp Alm Hi Hum Alrm Hi Hum Alm Lo Hum Alm Status Heat 0 DX Coo 0 Dehumidify 0 Humidify 0 Pos Active Alarms No Alarms or Alarm 01 of 01 High Head Setback Wknd Time 1 Wknd Temp 1 Wknd Tsens 1 Wknd Humd 1 Wknd Hsens 1 Wknd Time 2 Wknd Temp 2 Wknd Tsens 2 Wknd Humd 2 Wknd Hsens 2 Wkdy Temp 1 Wkdy Tsens 1 Wkdy Humd 1 Wkdy Hsens 1 Wkdy Time 2 Wkdy Temp 2 Wkdy Tsens 2 Wkdy Humd 2 Wkdy Hsens 2 Setup Operation Restart TD C F Degrees Humidity Control Dipswch 00000000 12345678 Setpoint Password Enter New PSW Setpt PSW 000 Setup Password Enter
110. te2 Optional Factory Installed Features Evaporator Chilled Water Units 3 5 Free Cooling Free cooling option includes separate cooling coil three way slow close valve and separate supply and return piping Free cooling is activated when the water temperature reaches a field adjustable temperature typically 45 F 7 C The valve is rated for 300psi 2068kPa working pressure 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 Figure 7 Free cooling arrangement Free cooling option A second cooling coil allows the system to take advantage of colder outdoor temperatures and bypass compressor operation Liebert Mini Mate2 When the water temperature goes below 45 F 7 C cooling switches over to free cooling operation A 1 also be used with air cooled systems separate chilled water source can Free 3 6 3 7 3 8 EEM Cooling Coil Water Temperature Sensor Water Glycol Congenser Field Piping
111. tings 2 Control voltage wiring must be a minimum of 16ga 1 3mm for up to Field supplied 75 23m or not to exceed 1 volt drop in control line field wired thermostat wire to remote wall box Entrance for Customer Low Voltage Connections Field supplied 24V NEC Class 2 wiring to DPNO00195 condensing module if applicable Rev 2 29 Liebert Mini Mate2 Site Preparation and Installation Figure 17 Close coupled installation 1 1 2 38mm Spacer Between Ao _ Close Coupled Evaporator Close Coupled Refrigerant and Condensing Unit Piping Connections Close Coupled Centrifugal Air Cooled Line Voltage Electrical Power or Water Glycol Supply Entrance Electric service Condenser not by Emerson Condenser Evaporator lt gt o zi J Evaporator Unit Electric Box Single Point Power Kit Option Factory supplied field installed and field wired DPN000196 Rev 0 5 6 Indoor Air Cooled Centrifugal Fan Condensing Unit Installation 5 6 1 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 unit should be located away from personnel Normal operating sound may be objectionable if the condensing unit is placed near quiet work areas Refer to Table 9 for maximum refrigerant line lengths To mount the unit in the ceiling refer to 5 5 Installing the Ceili
112. troller clock must be set to allow for the setback control The clock uses the 24 hour system i e 12 midnight is displayed as 24 00 To change the time press Enter to select the function then use the Up Down arrow to change the first character press Enter to store then press the Up Down arrow to change the section 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 the setback control To change the date press Enter then use the Up Down arrow to change the first character press Enter to store press the up down button to change the second character etc Setback The microprocessor can be programmed for night and weekend setback Two 2 events can be programmed per day for a five day workweek and two 2 events can be programmed for a two day weekend Table 22 can be used to devise a setback plan Table 22 Microprocessor night and weekend setback Event Weekend Weekday Time 1 Temperature 1 Sensitivity 1 Humidity 1 Humidity Sensitivity 1 Time 2 Temperature 2 Sensitivity 2 Humidity 2 Humidity Sensitivity 2 45 Liebert Mini Mate2 Microprocessor Control 6 9 6 9 1 6 9 2 6 9 3 6 10 Setup Operation Selecting Setpoint Setup from the Main Menu will display the following selections RESTART TIME DELAY CIF DEGREES HUMIDITY CONTROL METHOD Use the U
113. ue of displayed parameter while in a set mode setpoints time etc Arrow top near right Fan Speed HI LO Changes the fan speed between high and low fan speed on direct drive blower models not available on high static belt driven motor bottom far left when present Escape ESC 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 he alarm If this key is pressed when no alarms are present help text will appear bottom near left Down Arrow Decreases the value of displayed parameter while in a set mode bottom near right Enter ENTER After setting a control point press Enter to store the information in the microprocessor bottom far right Figure 26 Control key locations all mounted display box Menu Key On Off Key Escape Key Fan Speed Key Enter Key Alarm Silence Help Key Down Arrow Active alarms appear on the LCD 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 your unit and are based upon 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 pas
114. ure 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 O 2009 Liebert Corporation All rights reserved throughout the world Specifications subject to change without notice 0 Liebert is a registered trademark of Liebert Corporation All names referred to are trademarks or registered trademarks of their respective owners SL 10531_REV3_02 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 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
115. use building and equipment damage injury or death Do not remove or disable the ground current detector Liebert Mini Mate2 54 System Performance Microprocessor Controls 7 2 7 2 1 7 2 2 7 2 3 7 3 7 3 1 SCR Electric Reheat The SCR Silicon Controlled Rectifier controller proportionally controls the stainless steel reheat feature to maintain the selected room temperature The rapid cycling made possible by the SCR controller provides precise temperature control while the constant element temperature improves heater life During operation of the SCR control THE COMPRESSOR OPERATES CONTINUOUSLY The heaters are modulated to provide temperature control The display status will show when the unit is cooling and heating The control will automatically lock the compressor cooling to ON position except when the temperature falls below the low temperature alarm setpoint Cooling will then be disabled until the room temperature reaches this minimum temperature setpoint Humidity Control Dehumidification Humidification Required The humidity control is based on a calculated percentage requirement for dehumidification or humidification i e the difference between the return air humidity and the humidity setpoint As the return air humidity rises above the humidity setpoint the percent dehumidification required increases proportionally from 0 to 100 over a humidity band equal to the humidity sensitivity setting The
116. ween the sheave and pulley should produce from 1 2 to 1 12 to 25mm 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 Note that high efficiency filters can reduce air performance and evaporator capacity Liebert Mini Mate2 60 System Testing and Maintenance 9 2 4 High Static Belt Drive Blower Package Option The High Static Blower option is a belt driven blower box that is attached to the evaporator box Belt drive should be checked monthly for signs of wear and proper tension The motor sheave should be adjusted per the following chart Table 28 External static pressure available 2 Ton Units 3 Ton Units 885 CFM 1504 CMH 1250 CFM 2124 CMH Sheave ESP ESP Turns RPM in mm
117. wer outage Figure 6 Wall box 2 4 1 Other Standard Control Features Adjustable auto restart Calibrate sensors 5 day 2 day setback Predictive humidity control e Password protection Common alarm output Alarm enable disable e Remote shutdown terminals Self diagnostics Liebert Mini Mate2 8 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 Reheat Electric Reheat includes 304 304 stainless steel finned tubular reheat elements with high limit safety switch SCR Electric Reheat uses an SCR controller and unit control software to provide full cooling with modulating of the electric reheat elements to control air temperatures Reheat capacity is up sized to offset the cooling capacity The SCR Electric Reheat is not available on chilled water free cooling or 575V units Hot Water Reheat includes hot water coil 2 way solenoid valve and Y strainer NOTE This option is available only on Chilled Water units but not 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 contr
118. xtreme caution Circuit board adjustment should be performed by properly trained and qualified personnel only 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 Liebert Mini Mate2 64 System Testing and Maintenance 9 3 9 3 1 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 set point Raising the value increases 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 3 to 4 percent in either direction does not permit normal operation of the unit consult your Liebert supplier The POT1 controls the duration of the drain cycle This adjustment is factory set at 60 seconds 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 30 DIP switch settings for humidifier control board 2 and 3 ton unit Voltage SW1 SW2 SW3 SW4 Amps 20
119. y 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 represented and only after it has been acknowledged by being Silenced The exceptions are 1 Software alarms i e Loss of Power and Short Cycle will reset automatically 30 seconds after being silenced or acknowledged and 2 Specific alarms monitoring overload or high pressure switches may require a manual reset depending upon the model Standard 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 WIRING MAY BE REQUIRED AT THE FACTORY FOR SOME OF THE ALARMS Custom Alarms Custom alarm s messages are programmed at the LCD The message displayed may be included in a list of provided alarms or it may be customized text for up to 2 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 sensor switch One SPDT pressure switch is used for the
120. ystems Indoor Centrifugal Fan Condensing Units Indoor Air Cooled Centrifugal Fan Condensing Units include scroll compressor factory mounted disconnect switch condenser coil R 407C unit charge belt driven centrifugal blower assembly high pressure switch Liebert Lee Temp head pressure control system hot gas bypass and liquid line solenoid valve Unit must be mounted indoors Condensing unit is designed to use outdoor air with temperatures ranging from 30 F to 95 F 34 C to 35 C Outdoor Prop Fan Condensing Units Outdoor Prop Fan Condensing Units include scroll compressor condenser coil R 407C unit charge prop fan liquid line solenoid valve high pressure switch Liebert Lee Temp head pressure control and hot gas bypass Condensing unit is designed for outdoor locations with operating ambients ranging from 30 F to 95 F 34 C to 35 C Indoor Water Glycol Condensing Units Indoor Water Glycol Condensing Units includes scroll compressor R 407C unit charge factory mounted disconnect coaxial condenser hot gas bypass high head pressure switch and two way water regulating valve designed for 150psi 1034 3kPa Condensing units can be used on either a water or glycol cooling loop Chilled Water Units Chilled Water Units are 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 locati

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