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Liebert® PDX™ and Liebert PCW™ Thermal Management Systems

1. FF Morte O HW Sensor Jumpers J9 Low Voltage 200 240V To configure the PCB to the proper voltage the jumpers should be set as follows Factory setting do not adjust 200V 208V 380V 415V J8 High Voltage 380 600V P13 Mains Voltage Select Jumpers J6 200 208 J5 230V J3 380 415 O J2 460V WZ J1 575V Sl Green LED z Yellow Sma Hi 0 O Q J23 P1 P2 pa 5 ps P6 P7 oo o Jojo o foll o Jolla E ofo jol m alla J6 J9 J15 J17 J19 J10 J23 J5 J9 J15 J17 J19 J10 J23 J3 38 J15 31 J49 10 J23 J2 J8 J15 J17 J19 J10 J23 J1 J8 J15 J17 J19 J10 J23 230V 460V 575V Capacity adjust Default at 100 Sealed Do Not Adjust CURRENT TRANSFORMER For MES L 10 loop the current sensing wire twice through the current sensing coil L For MES L 20 loop the current sensing wire once through the current sensing coil 10 6 Condensate Drain and Condensate Pump Systems 10 6 1 Condensate Drain Check and clear obstructions in tubing during routine maintena
2. 1 Use Copeland POE Oil ULTRA 32 3MAF or other Copeland approved oils 10 11 2 Scroll and Digital Scroll Compressors Hermetic scroll and digital scroll compressors do not have an oil sight glass NOTE Refer to 6 2 2 Scroll and Digital Scroll Additional Oil Requirements for approved oil types and additional oil required based on the system s refrigerant charge 10 11 3 Compressor Replacement Replacement compressors are available through your local Emerson office Compressors are shipped in reusable packaging If unit is under warranty complete and include Liebert Service Credit Application LSCA with the compressor that is being returned The original compressor should be returned in the same packaging 10 11 4 Compressor Motor Burnout If a burnout has occurred a full system clean out is required if not compressor and system problems will continue For clean out warnings and procedures see Copeland Application Engineering Bulletin 24 1105 Principles of Cleaning Refrigeration Systems Liebert PDX and Liebert PCW 78 Maintenance 10 11 5 Digital Compressor Unloading Solenoid s When replacing a digital scroll compressor digital solenoid valve and coil must be replaced Compressor and valve kit are shipped separately Valve kit must be field brazed to top of compressor in proper orientation and supported with original factory bracket 10 11 6 Compressor Replacement Procedure 10 12 10 13
3. 1 Disconnect power and follow all warnings at front of this manual 2 Attach suction and discharge gauges to access fittings 3 Front seat service valves to isolate the compressor Reclaim charge from compressor 4 Remove marked pressure transducer and discharge pressure switch Disconnect all electrical connections 5 Detach service valves from compressor 6 Remove failed compressor 7 TT required follow compressor manufacturer s suggested clean out procedures 8 Install replacement compressor and make all connections Replace gaskets or seals on service valves Replace unloading solenoid 9 Evacuate charge and operate per 6 2 3 Air Cooled Condenser Without Liebert Lee Temp System or 6 2 4 Air Cooled Liebert MC Condensers with Liebert Lee Temp Flooded Condenser Head Pressure Control System NOTICE Risk of improper component reinstallation Can cause equipment damage Identify and mark location of suction pressure transducer and discharge pressure switch These devices look similar and they must be reinstalled in their original location Facility Fluid and Piping Maintenance Maintaining facility water and glycol quality is required throughout the life of the coolant fluid piping system Fluid and piping system maintenance schedules must be established and performed A coolant fluid maintenance program must be established that will evaluate fluid chemistry and apply necessary treatment The complexity
4. Open all local and remote electric power disconnect switches and verify with a voltmeter that power is Off before working within the various component electric connection enclosures 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 iCOM microprocessor does not isolate power from the unit even in the Unit Off mode 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 iCOM microprocessor 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 of Liebert iCOM control The factory supplied optional disconnect switch is inside the unit The line side of this switch 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 Refer to unit electrical schematic Follow all local codes WARNING Risk of explosive discharge from high pressure refrigerant Can cause injury or death This unit contains fluids and or gases under high pressure Relieve pressure before working with piping WARNING Risk of
5. Risk of improper refrigerant charging Can cause equipment damage Refrigerant R410A is a blended refrigerant and must be introduced and charged from the cylinder only as a liquid When adding liquid refrigerant to an operating system it may be necessary to add the refrigerant through the compressor suction service valve Care must be exercised to avoid damage to the compressor Emerson recommends connecting a sight glass between the charging hose and the compressor suction service valve This will permit adjustment of the cylinder hand valve so that liquid can leave the cylinder while allowing vapor to enter the compressor Turn on unit disconnect switch Operate the unit for 30 minutes using the charging function in the diagnostic section of the Liebert iCOM The charging function operates the compressor at full capacity and energizes the blower motor and liquid line solenoid valve The reheat and humidifier are disabled A minimum 20psig 138kPa must established and maintained for the compressor to operate The charging function can be reset as many times as required to complete unit charging Charge the unit until the liquid line sight glass becomes clear Then add one additional pound 0 45 kg of refrigerant NOTE A digital scroll compressor will have a clear sight glass only when operating at 100 capacity When operating below 100 the sight glass may show bubbles with each 15 second unloading cycle Liebert Lee Temp Receiver R
6. S A NOTE Unit Input Power Requirements For three phase units only three power wires and an earth ground are required A neutral is not required at the unit input connections WARNING Arc flash and electric shock hazard Open all local and remote electric power disconnect switches verify with a voltmeter that power is Off and wear personal protective equipment per NFPA 70E before working within the electric control enclosure Failure to comply can cause serious injury or death 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 Installation and service of this equipment should be done only by qualified personnel who have been specially trained in the installation of air conditioning equipment Follow all local codes NOTE Seal openings around piping and electrical connection to prevent air leakage Failure to do so could reduce the unit s cooling performance WARNING Risk of improper wire and loose electrical connections Can cause overheated wire and electrical connection terminals resulting in smoke fire equipment and building damage injury or death Use correctly sized copper wire only and verify that all electrical connections are tight before turning power On Check all electrical connections periodically and tighten as necessary NOTICE Risk of improper electrical connection of three
7. and Liebert PCW 84 HVAC Maintenance Checklist Maintenance Notes Signature Company Make photocopies for your records Compare readings information to previous maintenance worksheet To locate your local Emerson representative for Liebert engineered parts check the Liebert Web site www liebert com or call 1 800 LIEBERT 85 Liebert PDX and Liebert PCW 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 2014 Liebert Corporation All rights reserved throughout the world Specifications subject to change without notice Liebert is a registered trademark of Liebert Corporation All names referred to are trademarks or registered trademarks of their respective owners SL 19800_REVO_03 15 Emerson Network Power Liebert www emerson com 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 Environ
8. 44 Piping Schematics Figure 23 Piping schematic GLYCOOL models For systems with drycoolers refer to 10 15 Drycooler Settings LIEBERT HEAT REJECTION Drycooler Glycol Aquastat Sensing Bulbs Bib LIEBERT PDX UNIT and associated piping Chilled l Pressure Port Systems only y Gate Valves 1 L Shut Off Valve typical 1 S Flow Switch Supplied with Dual Pump Systems i Flow Regulating l Valve U Return Supply Shutoff Valve Shutoff Valve ttn Hr Hose 1 L Hose Air Vents I Pressure Port Evaporator Glycol Thermistor i Valve Service Valve Check Compressor External Valve Equalizer Discharge Heat Exchanger Expansion Sight Filter Drier Valve Glass Pressure Transducer Factory Piping 7 Field Piping Vv Service Schrader access connection no valve core Service Schrader access connection with valve core NOTE Schematic representation shown This schematic does not imply or define elevations and component location unless specifically noted 3 Way Motorized From Ball Valve Liebert iCOM Control To Liebert DPN002932 Components are not supplied by Rev 1 Emerson but are required for proper circuit operation and maintenance Field installed at highest point in system on return line to pumps Locate at tops of all risers and any intermediate system high points 45 Liebert PDX and Liebert
9. and Liebert PCW Liebert PDX and Liebert PCW Components and Nomenclature Component locations Upflow Liebert PDX Figure 3 i a tal 4 PES C A 0 o y x2 D 290 gt ea 0 ces e C os 0 LC 82 Oolo wow o v NO FT Filter partial filter shown for clarity Compressor GLYCOOL Dual Cooling optional Infrared Humidifier optional 12 Reheat optional Plate Condenser optional Disconnect Evaporator Coil 11 Econ O Coil Valve 13 Condensate Pump optional 14 Smoke Detector optional 5 6 7 8 9 10 14 13 DPNO03005 Rev 0 Rear View Liebert PDX and Liebert PCW Liebert PDX and Liebert PCW Components and Nomenclature Component locations Upflow Liebert PCW Figure 4 DPN003021 Rev 0 fj 7 7 Y AAA A a a ON Y NL LL EA LO T FRONT VI Filter partial filter shown for clarity Infrared Humidifier optional Disconnect Condensate Pump optional Chilled Water Valve Smoke Detector optional Serial Tag Electric Box Liebert iCO
10. Change tap if necessary T1 Volts 4 Check the compressor for proper rotation Change wiring at input source to unit if necessary Service technicians should use a gauge set on the Liebert PDX Liebert PCW system during the initial startup to verify that the three phase power is connected properly The rotation direction of EC blowers is not a reliable indicator of proper connection The blowers will rotate the same direction regardless of the three phase power input 5 Check main fan amps and record Li L2 L3 Fuse Liebert PDX and Liebert PCW 60 Initial Startup Checks and Commissioning Procedure for Warranty Inspection 10 11 12 13 14 15 16 17 18 Increase temperature setpoint to energize reheats Check and record amperage 1 2 3 Fuse Increase humidity setpoint to energize humidifier Check and record amperage L1 L2 L2 L3 L1 L3 Infrared Check water level and adjust high limit float for proper operation If condensate pump has been supplied check for proper operation Chilled water and Econ O Coil GLYCOOL only a Decrease temperature setpoint to energize valve motor Check for full valve travel in cooling mode b Adjust controls out of cooling mode Check for valve closure Decrease humidity setpoint to call for dehumidification Check for valve travel in dehumidification mode Decrease temperature setpoint to energize compressor s Check and record com
11. Shield Connection Factory wiring between Liebert MC control board and terminal strip B Heat Rejection Interlock Wire CANbus Cable Connection Low voltage field entrance on bottom left of condenser enclosure HEAT REJECTION INTERLOCK B INDOOR UNIT COMPONENT NOTES 1 Component appearance orientation and positioning may vary terminal names and callouts remain constant 2 All circuits to these connection points are Class 2 CABLE NOTES A Field supplied cable Shielded 22 18AWG stranded tinned copper Twisted pair minimum four twists per foot e Low capacitance 15pf ft or less Must be rated to meet local codes and conditions Examples Belden 89207 plenum rated or Alpha Wire 6454 Category 5 5e or higher 2 Do not run in same conduit raceway or chase as high voltage wiring 3 Contact Emerson for CANbus network lengths greater than 350 ft 107m WIRE NOTES B 1 Field supplied wire 18AWG or greater Rated 600V DPN003266 2 Run two wires from indoor unit to condenser PARTIAL VIEW SHOWN R 0 ev Liebert PDX and Liebert PCW 26 Electrical Connections Figure 18 Electrical field connections for Liebert iCOM Downflow models SN U f 21 DPN002934 Rev 0 20 Opening for field wiring suggested entry point for high voltage field wiring to unit 21 Opening for field wiring suggested entry point for low voltage field wiring to unit
12. four per leg 3 8 x 5 8 Terminal block for two wire 24V interlock connection between unit and condenser Condenser legs four with one fan units and six on two fan units Bolts six per receiver 3 8 x 1 Liebert Lee Temp system Insulated storage receiver one Head pressure control valve with integral check valve one Service valve one Pressure relief valve one Liquid level sight glass two Check valve one NOTE Lee Temp heater pad requires a separate continuous electrical source See nameplate on unit for proper voltage Lee Temp Leak Check and Evacuation Procedure Proper leak check and evacuation can be accomplished only with all system valves open and check valves accounted for NOTE Q Systems include a factory installed check valve and an additional downstream Schrader valve with core in the compressor discharge line Proper evacuation of the condenser side of the compressor can be accomplished only using the downstream Schrader valve See piping schematics Figures 21 through 25 1 If unit power is available open the unit liquid line solenoid valve using the evacuation function in the diagnostic section of the Liebert COM control If unit power is not available a field supplied 24VAC 75VA power source must be directly connected to each of the unit solenoid valves 2 Attach a jumper hose from the service valve fitting on the outlet of the receiver and the Schrader fitting on the dischar
13. s heat exchanger NOTICE Risk of frozen fluids Can cause equipment damage and building damage Freezing system fluids can rupture piping Complete system drain down cannot be ensured When the field piping or unit 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 NOTICE Risk of corrosion Can cause equipment damage Read and follow individual unit installation instructions for precautions regarding fluid system design material selection and use of field provided devices Liebert systems contain iron and copper alloys that require appropriate corrosion protection Contact a water consultant about water quality corrosion and freeze protection requirements Water chemistry varies greatly by location as do the required additives called inhibitors that reduce the corrosive effect of the fluids on the piping systems and components The chemistry of the water used must be considered because water from some sources may contain corrosive elements that reduce the effectiveness of the inhibited formulation Preferably surface waters that are classified as soft and are low in chloride and sulfate ion content should be employed Proper inhibitor maintenance must be performed to prevent corrosion of system components Consult glycol manufacturer for testing and maintenance of
14. 2 875 9mm SECTION C C HUM ECR o FRONT VIEW 1 Pipes at various heights to allow tube cutter to be used Will require stub tubes and elbows for connection at these locations 2 Humidifier must be routed through this opening to the connection at the left hand side of the unit Supplied on dual cooling systems only 4 pipe system ECS C Without Right Side Discharge HUM z i ECS ci 091 SR R ie CE ep y L_ with Right Side Discharge Field pitch condensate drain line a minimum of 1 8 3 2mm per foot 305mm All units contain a factory installed condensate trap Do not trap external to the unit Drain line may contain boiling water Select appropriate drain system materials The drain line must comply with all local codes DPN002945 Rev 0 Connection Size Opening in Point Description X in mm Y in mm Z in mm PDX018 PX023 PDX029 L1 Liquid Line System 2 7 8 73 24 3 4 630 3 76 1 2 5 8 G1 Hot Gas Discharge 2 7 8 73 27 3 8 694 3 76 5 8 7 8 CD Condensate Drain 12 1 8 309 3 76 3 4 CE Condensate Electrical 23 3 4 606 2 3 4 70 1 3 8 HUM Humidifier Supply Line 30 1 8 766 2 1 2 64 1 4 ECS Econ O Coil Supply 2 7 8 73 7 5 8 195 3 76 1 1 8 ECR Econ O Coil Return 2 7 8 73 11 3 4 298 3 76 1 1 8 E1 Electrical
15. 34 1 2 l 876mm FRONT VIEW Rev 2 DPN002936 Table 3 Weights for downflow Liebert PDX and Liebert PCW Ib kg Liebert PDX Model No PX018 023 PX029 Air Cooled 670 304 700 317 Air Cooled w Dual Cool 750 340 790 358 Water Glycol 690 313 720 327 GLYCOOL or Water Glycol w Dual Cool 770 349 810 367 Liebert PCW Model No PW017 029 Chilled Water 600 272 Source DPN002936 Rev 2 Liebert PDX and Liebert PCW 12 Liebert PDX and Liebert PCW Dimensions and Weights Figure 6 77 9 16 1970mm Cabinet and floor planning dimensions front discharge downflow 33 1 8 842mm 34 5 8 879mm 10 3 4 273mm 34 a La aa 864mm 864mm 674mm 34 1 2 876mm FRONT LEFT ISO VIEW AN Shaded area indicates the recommended minimum clearance for component access A Optional opening for units with right side discharge or right and left side discharge DPN002944 A Optional opening for units with left side discharge or right and left side discharge Rev 0 Table 4 Weights for downflow Liebert PDX and Liebert PCW Ib kg Liebert PDX Model No PX018 023 PX029 Air Cooled 670 304 700 317 Air Cooled w Dual Cool 750 340 790 358 GLYCOOL or Water Glycol w Dual Cool 770 349 810 367 Water Glycol 690 313 720 327 Liebert PCW Model No PW017 029
16. AND LIEBERT PCW COMPONENTS AND NOMENCLATURE Figure 1 Component locations Downflow Liebert PDX Front View Filter Serial Tag Electric Box Liebert iCOM EC Fan Infrared Humidifier optional Compressor Evaporator Coil Plate Condenser optional 10 Disconnect 11 Smoke Detector optional 12 Reheat optional 13 Econ O Coil Valve GLYCOOL Dual Cooling optional OMNANKRWN DPN003004 Rear View Rev 0 Liebert PDX and Liebert PCW 4 Liebert PDX and Liebert PCW Components and Nomenclature Figure 2 Component locations Downflow Liebert PCW Front View Filter Serial Tag Electric Box Liebert iCOM Infrared Humidifier optional EC Fan Chilled Water Valve Disconnect Chilled Water Coil Smoke Detector optional Reheat optional yy 11 EH OO ee oN gt DPN003020 X Rev 0 Rear View 5 Liebert PDX
17. CHECKS AND COMMISSIONING PROCEDURE FOR WARRANTY INSPECTION ica aaa ada 59 Information for Warranty Inspection Remove Power From Unit Disconnect 60 Startup Checks With Panels Removed and Main Disconnect QT 60 9 21 Inspect and Recorte ia dedo i 60 SAA A O Ba bie he Ped ohh ers 60 Commissioning Procedure With Panels On 0 0c eee een 62 MAINTENANCE ipso 8 NT Te Be eee a os 63 Puerma Me etd de tees Gad Send Bak Se Eee Sie be oak a ea bak en 64 10 1 1 Filter Replacement Procedure Downflow Units 0 0 0 0 ccc eens 64 10 1 2 Filter Replacement Procedure Upflow Units 0 0 0c eee eas 64 Blower Drive System EC Fans 0 0 nent o 64 10 2 1 Fan Impellers and Bearings nunana cece eee eee nna 64 10 227 Protective Features eii A ataj 65 Removing EC Fans Downflow Models 0 ccc eee ees 66 Humidifier Intrare ds iia dicta ae Pty eee oa deed Padded a pala ad 69 10 4 1 Cleaning Humidifier Pan and Float Switch 0 0 ccc eee eens 69 10 4 2 Changing Humidifier Lamps 0 000 cee nee ees 70 Humidifier Steam Generating 0 0 eens 70 10 5 1 Replacing the Steam Generating Humidifier Canister 0 0 0 0 cece eee 72 Condensate Drain and Condensate Pump Systems o o 76 106 1 Condensate Drain A ea di Ee eae ee ee N 76 10 6 2 Condensate Pump 76 Air Cooled Condenser and Drycoolers rr 77 Reheat Electri Reheat rra ia E Se ae 77 Thermos
18. Connection High Voltage Top 31 788 27 3 4 704 7 8 1 3 8 1 3 4 E2 Electrical Connection High Voltage Top 31 788 30 760 7 8 1 3 8 1 3 4 LV1 Electrical Connection Low Voltage Top 31 5 8 802 24 7 8 699 1 Source DPN002945 Rev 0 49 Liebert PDX and Liebert PCW Piping Schematics Figure 28 Primary connection locations Liebert PDX downflow water glycol GLYCOOL cooled models Note Drawing not to scale Tolerance on All dimensions from rear corner of unit All dimensions from rear corner of unit including panels all piping dimensions S c x is 1 2 13mm including panels 05 lt E i 0 H Y wse d U d N ECS Y iCD ECR l no d N Electrical Top 33 Y Connections 837mm B Y Y N LV3 y O CE ES IE SN o i El V2 L WR o E4 HUM Y Front of Unit TOP VIEW Front of Unit LV1 34 1 2 876mm SECTION A A 1 B SE L e 28 1 2 Supply Air R 725mm Discharge Opening A al 30 1 2 a 2 775mm A ES l B FRONT VIEW B SECTION B B Field pitch condensate drain line a minimum of 1 8 3 2mm per foot 305mm All units contain Supplied on dual cooling systems only four pipe system Rev 1 a factory installed condensate trap Do not tr
19. a factory installed high pressure safety switch in the high side refrigerant circuit Consult building codes to determine whether condensers without receivers require field provided pressure relief devices A fusible plug kit is available for field installation Table 8 Recommended refrigerant line sizes OD copper inches Standard Scroll and Digital Scroll Models Model PX018 PX023 PX029 Equivalent Hot Gas Liquid Hot Gas Liquid Hot Gas Liquid Length Line Line Line Line Line Line soft 15m 5 8 112 34 58 78 5 8 100 ft 30m 5 8 1 2 3 4 5 8 7 8 5 8 150 ft 45m 5 8 1 2 3 4 5 8 7 8 5 8 300 ft 91m 7 8 5 8 7 8 5 8 1 1 8 3 4 Source DPNO00788 Rev 0 Table 9 Indoor unit approximate refrigerant charge for R 410A R 410A Charge System Type Model Ib kg PX018 5 0 2 3 Air Cooled PX023 5 3 2 4 PX029 5 8 2 6 33 Liebert PDX and Liebert PCW Piping Table 10 Interconnecting piping refrigerant charge Line Size R 410A Ib 100 ft kg 30m O D in Liquid Line Hot Gas Line 3 8 3 2 1 4 1 2 5 9 2 7 0 7 0 3 5 8 9 6 4 3 1 1 0 5 3 4 14 3 6 4 1 6 0 7 7 8 19 8 8 8 2 3 1 0 1 1 8 33 8 15 1 3 9 1 7 1 3 8 51 5 23 0 5 9 2 6 Source DPN003099 Rev 0 Table 11 Condenser refrigerant charge Standard Approximate R 410A Refrigerant Needed Condenser Con
20. all local codes A WARNING Risk of improper wiring piping moving lifting and or handling Can cause equipment damage injury or death Only qualified service personnel should move install or service this equipment Read all installation operating and safety instructions before proceeding Read and follow all warnings in this manual A CAUTION Risk of smoke generation Can cause fire suppression and alarm system activation resulting in injury during building evacuation and mobilization of emergency fire and rescue services Startup operation of optional electric reheat elements can create smoke or fumes that can activate the facility alarm and fire suppression system Prepare and take appropriate steps to manage this possibility Activating reheat during initial startup may burn off particulates from electric reheat elements Check the steam generating humidifier electrode plugs to ensure that they are pressed firmly onto the pins Loose connections will cause the cylinder and plugs to overheat Before beginning initial startup checks make certain that unit was installed according to the instructions in this manual All exterior panels must be in place NOTICE Risk of improper electrical connection of three phase input power Can cause backward compressor operation and unit damage Service technicians should use a gauge set on the Liebert PDX and Liebert PCW system during the initial startup to verify that the three phase po
21. and remove the skid 19 Liebert PDX and Liebert PCW Equipment Inspection and Handling Figure 13 Remove the unit from the skid with a forklift Lift Unit 318627P1 Remove Pg 2 Rev 0 Skid 4 2 2 Removing the Unit from the Skid Using Rigging 1 Remove the fasteners holding the unit to the skid as stated in 4 2 1 Removing the Unit from the Skid With a Forklift 2 Place slings under the unit using spaces between the skid deck boards Use the center of gravity indicators on the unit to determine the position of the slings see Figure 14 A WARNING Risk of improper moving Can cause equipment damage injury or death The slings must be equally spaced on either side of the center of gravity indicator Improper spacing or placement of the tines may cause the unit to tip and fall 3 Use spreader bars or an equivalent device to protect the unit from crushing when it is lifted with the slings Ensure that the unit s panels if attached are protected from the slings 4 If rigging is to be used to move the unit closer to the site for installation place one or two horizontal straps around the unit at mid height see Figure 14 5 Lift the unit off the skid 6 Remove the skid from under the unit Liebert PDX and Liebert PCW 20 Equipment Inspection and Handling Figure 14 Remove the unit from the skid with rigging Step 2 Center
22. aquastat setting See Tables 21 and 22 for aquastat setting guidelines Applications with the optional stat setting require field piping to be insulated to prevent condensation The unit requires a drain which must comply with all applicable codes This drain line may contain boiling water See 6 1 1 Condensate Piping Field Installed for details Three phase electrical service is required for all models Electrical service must conform to national and local electrical codes See equipment nameplate for details If seismic requirements apply consult your local Emerson representative for information about a seismic rated floor stand NOTE Seal openings around piping and electrical connection to prevent air leakage Failure to do so could reduce the unit s cooling performance 9 Liebert PDX and Liebert PCW Pre Installation Guidelines 2 5 2 5 1 2 5 2 Operating Conditions Cooling Humidification and Dehumidification The Liebert PDX and Liebert PCW must be operated in a conditioned space within the operating envelope ASHRAE recommends for data centers Maximum dew point of 59 F 15 C Operating outside this envelope can decrease equipment reliability Return air to the Liebert PDX and Liebert PCW must be no cooler than the ASHRAE recommendation of 68 F 20 C DB and 40 RH or minimum WB of 54 F 12 2 C for proper unit operation Operating below this can decrease equipment reliability Refer to
23. conductivity too high Check water level in the cylinder should be more than one quarter full If it is not check the fill rate 24VAC voltage on fill valve terminals unit must be on with call for humidity green light steady on Verify Two No current detection for 30 m water supply to the humidifier Leaking drain valve can be at flashes in Off minutes with continuous avlt minerals blocking the plunger i e If cylinder is more than 4 full check primary power connections to sequence call for humidity S 7 l the cylinder continuity of wires to cylinder Are power wires connected to proper terminals on the cylinder Color coding Low water conductivity Check L1 to ensure that power is properly connected Check that L1 wire runs through CT of main PCB Cylinder may be defective check for conductivity between powered Three No current detected with pins and H W S should be an opened circuit Ensure all legs are flashes in Off high water sensor drawing similar current sequence activated Low water conductivity Are power wires connected to proper terminals on the cylinder Color coding Foaming Four Check water level in the cylinder it should be about three fourths full n 2 End of cylinder life change Check for foaming if water level lower or cylinder life shorter than ashes in Off sequence cylinder expected Change cylinder clean drain valve Table 19 Steam generating humidifier troubleshooting guide Symptom Possi
24. contact with hot surfaces Can cause burn injury The humidifier canister and steam discharge lines are extremely hot during operation Allow sufficient time for them to cool before handling Use extreme caution and wear OSHA approved safety glasses and thermally insulated gloves and arm protection when performing maintenance on the humidifier After an extended period of operation in accordance with life expectancy information the cylinder is completely used as indicated by the amber high water sensor light illuminated on the cabinet When this condition is reached a new replacement cylinder is to be installed 3 NOTE The amber high water sensor light may come on during initial startup but this instance does not indicate that the cylinder should be replaced Liebert PDX and Liebert PCW 72 Maintenance The steam cylinder is disposable and must be replaced at the end of the cylinder s life Cylinder life will vary according to water supply conditions and humidifier usage Table 17 Humidifier canister part numbers Unit Model 200V 208V 230V 380 415V 460V Humidifier Model PX018 023 029 MES 2 317911p1 317911p2 PW017 029 MES 2 Removing the Old Canister To replace a used up humidifier cylinder refer to Figure 42 and perform these steps 1 Turn Off the water supply to unit 2 The old cylinder must be drained completely before removing This is done by pushing the auto On Of
25. eens 22 5 0 ELECTRICAL CONNECTIONS 000 c eee eee ee ee eee ee eee eee 23 5 1 Standard Electrical Connections 24 5 2 Supply Temperature Sensor ee ee ene eee e eee e eee e ens 29 6 0 PIPING creer A ee ees Sie ee te eee SS 30 6 1 Fluid Connections Condensate and Humidifier 0 ccc ees 30 6 1 1 Condensate Piping Field Installed 0 0 tenets 30 6 1 2 Humidifier Supply Water Optional Infrared 0 0 0 00 tenes 32 6 1 3 Humidifier Supply Water Optional Steam Generating ooo 32 6 2 Refrigeration Piping Air Cooled Units 0 c ccc eee nnn ee enns 32 6 2 1 Piping Guidelines Air Cooled Units 33 6 2 2 Scroll and Digital Scroll Additional Oil Requirements 0 00 cece eens 34 6 2 3 Air Cooled Condenser Without Liebert Lee Temp System o 35 6 2 4 Air Cooled Liebert MC Condensers with Liebert Lee Temp Flooded Condenser Head Pressure Control System 40 6 3 Fluid Connections for Systems Using Water Glycol and Chilled Water 42 7 0 PIPING SCHEMATICS tea L R N a 9 teeter Pig ee ae A a Bat eh ar a ae ee ke 43 8 0 CHECKLIST FOR COMPLETED INSTALLATION 2 00 cece eee ee eee eee ee eee ees 57 8 1 Moving and Placing Equipment 57 8 2 8 3 8 4 9 0 9 1 9 2 9 3 9 4 10 0 10 1 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 9 10 10 10 11 10 12 10 13 10 14 10 15 11 0 A RR RO 57 A A O E A a Gate eu dace 58 INITIAL STARTUP
26. is sufficient to displace the air Control the flow using a suitable measuring device Ensure that the tubing surfaces to be brazed are clean and that all burrs have been removed from the ends of the tubes Ensure that all loose material has been cleaned from inside the tubing before brazing Protect all refrigerant line components within 18 460mm of the brazing site by wrapping them with a wet cloth or with a suitable heat sink compound Isolate piping from building using vibration isolating supports Refer to Table 8 for piping sizes Refer to condenser installation manual for charging information Install traps on hot gas discharge lines at the base of vertical risers and every 25 feet 7 6m of vertical rise Pitch horizontal hot gas piping down at a minimum rate of 1 2 per 10 feet 42mm per 10m so that gravity will aid in moving oil in the direction of refrigerant oil flow Condenser cannot be installed below the evaporator The maximum height of the condenser above the evaporator is 60 feet 18 3m Consult factory if piping run exceeds 150 feet 46m equivalent length Keep piping clean and dry especially on units with R 410A refrigerant Avoid piping runs through noise sensitive areas Do not run piping directly in front of airstream Refrigerant oil do not mix oil types see 10 11 1 Compressor Oil Refer to ASHRAE Refrigeration Handbook for general good practice refrigeration piping The Liebert indoor cooling unit has
27. lubrication Can cause compressor and refrigerant system damage Failure to use oil types viscosities and quantities recommended by the compressor manufacturer may reduce compressor life and void the compressor warranty See Table 20 for compressor oil types Do not mix polyolester POE and mineral based oils Do not mix oils of different viscosities Consult your Emerson representative at 1 800 LIEBERT or the compressor manufacturer if questions arise Liebert PDX and Liebert PCW 34 Piping 6 2 3 Air Cooled Condenser Without Liebert Lee Temp System Evacuation Air Cooled Models Proper leak check and evacuation can be accomplished only with all system valves open and check valves accounted for NOTE Q The system includes a factory installed check valve and an additional downstream Schrader valve with core in the compressor discharge line Proper evacuation of the condenser side of the compressor can be accomplished only using the downstream Schrader valve See piping schematic 1 If unit power is available open the unit liquid line solenoid valves using the evacuation function for System 1 in the diagnostic section of the Liebert iCOM control If unit power is not available a field supplied 24VAC 75VA power source must be directly connected to the unit solenoid valve 2 Connect refrigerant gauges to the suction rotalock valves and discharge line Schrader valves 3 Open the service valve
28. other Whenever possible the pipes should be run parallel to the air flow Fluid Connections Condensate and Humidifier NOTICE Risk of clogged or leaking drain lines Can cause equipment and building damage This unit requires a water drain connection Drain lines must be inspected regularly and maintenance must be performed to ensure that drain water runs freely through the drain system and that lines are clear and free of obstructions and in good condition with no visible sign of damage or leaks This unit may also require an external water supply to operate Improper installation application and service practices 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 water damage Emerson recommends installing a monitored fluid detection system to immediately discover and report coolant fluid system and condensate drain line leaks NOTE Seal openings around piping and electrical connection to prevent air leakage Failure to do so could reduce the unit s cooling performance Condensate Piping Field Installed Do not reduce drain lines Do not expose drain line to freezing temperatures Drain line may contain boiling water Use copper or other suitable material Drain line must comply with local building codes Emerson recommends installing under floor leak detection equipme
29. phase input power Can cause backward compressor rotation and unit damage Service technicians should use a gauge set on the Liebert PDX and Liebert PCW system during the initial startup to verify that the three phase power is connected properly The EC fans are not a reliable indicator of proper connection The blowers will rotate the same direction regardless of the three phase power input Three phase power must be connected to the unit line voltage terminals in the proper sequence so that scroll compressors rotate in the proper direction NOTICE Risk of improper electrical supply connection Can cause equipment damage See transformer label for primary tap connections Installer will need to change transformer primary taps if applied unit voltage is other than pre wired tap voltage 23 Liebert PDX and Liebert PCW Electrical Connections Figure 16 Electrical field connections Upflow and downflow models gt BTT 17 G JS O E A Pl 16 El E a 18 E 181 LIE g 13 S 2a Q 15 S Sot 8 a HEO E JON 11 A Z aie 8l Z a 00 11 Set 8 e eje 2 10 S E S LIS Peasy oc seas OO E c Ear 10 4 estado rf petit aziR1aran R arr o O 12 a oo oP pa N 12 Terminal Block 1 5 6 7 for Customer 14 Refer to specificatio
30. return floor stand also available DPNO002941 Rev 0 X Y Point Description in mm in mm Connection Size Opening in WS Water Supply 5 1 8 131 25 5 8 652 1 1 8 WR Water Return 2 7 8 73 25 5 8 652 1 1 8 CD Condensate Drain 16 5 8 422 3 1 4 80 3 4 FPT CDP Condensate Drain With Pump 3 1 4 83 5 7 8 149 1 2 HUM Humidifier Supply Line 29 1 2 750 26 663 1 4 Electrical Connection High El Voltage 31 1 4 794 30 761 7 8 1 3 8 1 3 4 Electrical Connection High E2 Voltage 31 1 4 794 27 3 4 702 7 8 1 3 8 1 3 4 Electrical Connection Low LV1 Voltage 1 1 2 38 27 1 2 699 1 Electrical Connection Low LV2 Voltage 1 1 2 38 26 1 2 673 1 Source DPN002941 Rev 0 Liebert PDX and Liebert PCW 56 Checklist for Completed Installation 8 0 CHECKLIST FOR COMPLETED INSTALLATION 8 1 Moving and Placing Equipment ___1 Unpack and check received material __ 2 Proper clearance for service access has been maintained around the equipment __ 3 Equipment is level and mounting fasteners are tight 8 2 Electrical ___ 1 Supply voltage and phase matches equipment nameplate __ 2 Wiring connections completed between disconnect switch evaporator unit and heat rejection equipment 3 Power line circuit breakers or fuses have proper ratings for equipment installed __ 4 Control wiring connections completed between indoor evaporator and heat rejection equipment 5 Allinternal and external h
31. to less than 100 will cause the coil to freeze on DX units will overheat the reheat components on any unit and cause condensation problems on any unit equipped with a humidifier The Liebert PDX and Liebert PCW are single components in the facility heat removal system The system includes air distribution raised floors duct systems outdoor heat rejection condensers pumps drycoolers cooling towers piping heat rejection fluid ambient temperature etc and indoor cooling and humidity loads equipment load location outside air infiltration Proper application and maintenance of the entire system is critical to the life and reliability of the Liebert PDX and Liebert PCW Good maintenance practices are essential to minimizing operation costs and maximizing product life Read and follow monthly and semi annual maintenance schedules included in this manual These MINIMUM maintenance intervals may need to be more frequent based on site specific conditions See the Liebert iCOM user manual SL 18835 for instructions on how to utilize the unit controller to predict some service maintenance intervals Emerson recommends the use of trained and authorized service personnel extended service contracts and factory specified replacement parts Contact your local Emerson representative 63 Liebert PDX and Liebert PCW Maintenance 10 1 Filters NOTICE Risk of improper filter installation Can cause filter collapse an
32. 1 4 80 3 4 FPT CDP Condensate Drain With Pump 3 1 4 83 5 7 8 149 1 2 HUM Humidifier Supply Line 29 1 2 750 26 663 1 4 ECS Econ O Coil Supply 4 1 4 111 3 1 4 81 1 1 8 ECR Econ O Coil Return 2 5 8 67 10 256 1 1 8 El Electrical Connection High Voltage 31 1 4 794 30 761 7 8 1 3 8 1 3 4 E2 Electrical Connection High Voltage 31 1 4 794 27 3 4 702 7 8 1 3 8 1 3 4 LV1 Electrical Connection Low Voltage 1 1 2 38 27 1 2 699 1 LV2 Electrical Connection Low Voltage 1 1 2 38 26 1 2 673 1 Source DPN002943 Rev 0 55 Liebert PDX and Liebert PCW Piping Schematics Figure 34 Primary connection locations Liebert PCW chilled water upflow models NOTE Drawing not to scale Tolerance on all piping dimensions is 1 2 13mm 34 1 2 All dimensions from rear corner of unit including panels 875 8mm x 30 1 2 28 1 2 725 0mm Dimensions from rear bottom corner of unit including panels Supply Air Discharge Opening RIGHT SIDE VIEW TOP VIEW Front of Unit Field pitch condensate drain line a minimum of 1 8 3 2mm per foot 305mm All units contain a factory installed condensate trap Do not trap external to the unit Drain line may contain boiling water Select appropriate drain system materials The drain line must comply with all local codes Unit with front return shown Bottom return with rear
33. 22 Vacant Liebert IntelliSlot may contain optional Liebert IntelliSlot cards 23 Populated Liebert IntelliSlot optional Liebert IntelliSlot cards may be placed in either of two supplied Liebert IntelliSlot locations 24 Wire tie anchors use to secure field supplied network cables to Liebert IntelliSlot 25 Wire tie anchors use to secure customer Ethernet wiring to control board and display 27 Liebert PDX and Liebert PCW Electrical Connections Figure 19 Electrical field connections for Liebert COM Upflow models DPNO02935 Rev 0 20 Opening for field wiring suggested entry point for high voltage field wiring to unit 21 Opening for field wiring suggested entry point for low voltage field wiring to unit 22 Vacant Liebert IntelliSlot may contain optional Liebert IntelliSlot cards 23 Populated Liebert IntelliSlot optional Liebert IntelliSlot cards may be placed in either of two supplied Liebert IntelliSlot locations 24 Wire tie anchors Use to secure field supplied network cables to Liebert IntelliSlot 25 Wire tie anchors Use to secure customer Ethernet wiring to control board and display Liebert PDX and Liebert PCW 28 Electrical Connections 5 2 Supply Temperature Sensor The Liebert iCOM is equipped with a supply discharge air temperature sensor The sensor can be used to provide a consistent supply air temperature by adjusting the compressor capacity or chilled wat
34. 7 3 4 702 7 8 1 3 8 1 3 4 LV1 Electrical Connection Low Voltage 1 1 2 38 27 1 2 699 1 LV2 Electrical Connection Low Voltage 1 1 2 38 26 1 2 673 1 Source DPN002939 Rev 1 Liebert PDX and Liebert PCW 54 Piping Schematics Figure 33 Primary connection locations Liebert PDX upflow water glycol GLYCOOL models NOTE Drawing not to scale Dimensions from rear bottom corner of unit including panels RIGHT SIDE VIEW Tolerance on all piping dimensions 34 1 2 All dimensions from rear corner of unit is 1 2 13mm T m CD L 876mm 30 1 2 775mm Supply Air Discharge Opening TOP VIEW Field pitch condensate drain line a minimum of 1 8 3 2mm per foot 305mm All units including panels Front of Unit contain a factory installed condensate trap Do not trap external to the unit Drain line may contain boiling water Select appropriate drain system materials The drain line must comply with all local codes Supplied on dual cooling systems only 4 pipe system DPN002943 Unit with front return shown Bottom return with rear return floor stand also available Rev 0 Point Description X in mm Y in mm Connection Size Opening in WS Water Glycol GLYCOOL 5 1 8 74 25 5 8 297 1 1 8 WR Water Glycol GLYCOOL Return 2 7 8 73 25 5 8 652 1 1 8 CD Condensate Drain 16 5 8 422 3
35. ASHRAE s publication Thermal Guidelines for Data Processing Environments Heating The Liebert PDX and Liebert PCW are qualified for heating only operation at temperatures not exceeding 80 F 27 C Liebert PDX and Liebert PCW 10 Liebert PDX and Liebert PCW Dimensions and Weights 3 0 LIEBERT PDX AND LIEBERT PCW DIMENSIONS AND WEIGHTS Table 1 Shipping dimensions Liebert PDX and Liebert PCW domestic and export LxWxH in mm Model Number Domestic Export PX018 PX023 PX029 45 x 45 x 85 45 x 45 x 86 PWO17 PWO29 1143 x1143 x 2159 1143 x1143 x 2184 Table 2 Shipping weights approximate Model Cooling Type Domestic Ib kg Export Ib kg SST 780 853 8 884 400 9 pxo18 Air with Dual Cool 860 390 964 437 2 PX023 WIG 800 362 8 904 410 Water Glycol with Dual Cool amp GLYCOOL 880 399 2 984 446 3 Air 810 367 4 914 414 6 Air with Dual Cool 900 408 2 1004 455 4 PX029 W G 830 376 5 934 423 6 Water Glycol with Dual Cool amp GLYCOOL 920 417 3 1024 464 5 a EW 710 322 0 814 369 2 11 Liebert PDX and Liebert PCW Liebert PDX and Liebert PCW Dimensions and Weights Figure 5 Cabinet and floor planning dimensions downflow 34 5 8 879mm TOP VIEW 77 9 16 1970mm Shaded area indicates a recommended minimum clearance for component access o rep K 3 3 a
36. Chilled Water 600 272 Source DPN002944 Rev 0 13 Liebert PDX and Liebert PCW Liebert PDX and Liebert PCW Dimensions and Weights Figure 7 Cabinet and floor planning dimensions Upflow 34 11 16 881mm 77 5 8 1971mm 32 15 16 access Top View Shaded area indicates a recommended minimum clearance for component S LA 34 864mm ze 34 864mm NOTE Unit with front return shown Bottom return with rear return floor stand also AAA available 34 112 ___ DPN002937 876mm Rev 0 Front View Table 5 Approximate weights upflow models Ib kg Liebert PDX Model No PX018 023 PX029 Air Cooled 670 304 700 317 Air Cooled w Dual Cool 750 340 790 358 Water Glycol 690 313 720 327 GLYCOOL or Water Glycol w Dual Cool 770 349 810 367 Liebert PCW Model No PW017 029 Chilled Water 600 272 Source DPN002937 Rev 0 Liebert PDX and Liebert PCW 14 Liebert PDX and Liebert PCW Dimensions and Weights 3 1 Floor Stand Dimensions Figure 8 Floor stand dimensions Downflow and upflow front return floor stands 32 5 8 829mm 30 11 16 779mm DPNO02970 Rev 0 Table 6 Floor stand height Downflow A Height in mm 6 152 9 229 12 305 15 381 18 457 21 533 24 610 Leveling feet are provided with 1 1 2 38mm adjustment from nominal height A Source DP
37. E For assistance contact Emerson Network Power Liebert Services at 1 800 LIEBERT A WARNING Arc flash and electric shock hazard Open all local and remote electric power disconnect switches verify with a voltmeter that power is Off and wear personal protective equipment per NFPA 70E before working within the electric control enclosure Failure to comply can cause serious injury or death Before proceeding with installation read all included installation operating and safety instructions verify that all the parts are included and check the nameplate to be sure the voltage matches available utility power Follow all local codes A WARNING Risk of electric shock Can cause injury or death Open all local and remote electric power supply disconnect switches and verify with a voltmeter that power is Off before working within the various component electric connection enclosures A WARNING Risk of improper wiring piping moving lifting and handling Can cause equipment damage injury or death Only qualified service personnel should work on this equipment Read all installation operating and safety instructions before proceeding Read and follow all warnings in this manual NOTICE Risk of improper Liebert iCOM operation Can cause damage to equipment Do not change Advanced Menu parameter settings in the Liebert iCOM without first getting permission from Emerson Network Power Liebert Service Lowering this parameter
38. If unit has a condensate pump turn unit OFF at Liebert iCOM control Pull out the humidifier standpipe in pan Inspect the O ring replace if necessary Let the pan drain and condensate pump operate if applicable Disconnect power from the unit Disconnect the drain coupling from the bottom of the pan Remove the thermostat from the bottom of the pan and the retaining screws from the sides of the pan 10 Slide the pan out 11 Loosen scale on side and bottom of pan with a stiff nylon brush or plastic scraper 12 Flush with water 13 Carefully clean scale off float switch make sure to reinstall correctly see Figure 39 14 Reinstall the pan thermostat standpipe drain coupling and screws into the humidifier 15 Operate the humidifier and check for leaks EE DOT Oe SOUS ON 69 Liebert PDX and Liebert PCW Maintenance Figure 39 Correct float switch orientation L X J Correct Switch Orientation Incorrect Switch Orientation DPN000996 Rev 0 10 4 2 Changing Humidifier Lamps NOTE Touching quartz lamps with bare hands will severely shorten bulb life Skin oils create hot spots on lamp surface Wear clean cotton gloves when handling lamps 1 Remove humidifier pan see 10 4 1 Cleaning Humidifier Pan and Float Switch Steps 1 through 10 Disconnect power from unit At humidifier remove screws and cover from high voltage compartment Disconnect one end of purple jumper wires Usin
39. Liebert PDX and Liebert PCW Thermal Management Systems User Manual 17 29kW 5 8 Tons Upflow and Downflow 60Hz L Q EMERSON Network Power TABLE OF CONTENTS IMPORTANT SAFETY INSTRUCTIONS 00 cece eee eee eee eee ee eee eee eee eee ee eee 1 SAVE THESE INSTRUCTIONS 3 03 ese coa a 1 1 0 LIEBERT PDX AND LIEBERT PCW COMPONENTS AND NOMENCLATURE 4 2 0 PRE INSTALLATION GUIDELINES 00 c eee eee eee eee ee ee eee ee eee eee 9 2 1 Room Preparate dd bMS ae CASS ewe 9 2 2 Air Distribution Downflow Units 9 2 3 Air Distribution Upflow Units 9 2 4 Connections and System Setup 9 2 5 Operating Conditions nsss s TS A OTR ATR Eee wd AR AS OPES EA 10 2 5 1 Cooling Humidification and Dehumidification 0 naasa ansaa eens 10 Dine A ADA see ah sare athe Sah RG St baie nahi AE AEAEE EE NN 10 3 0 LIEBERT PDX AND LIEBERT PCW DIMENSIONS AND WEIGHTS o 11 3 1 Floor Stand Dimensions 15 3 2 Plenum RET TTT A a Ad EI a Eo Dada 17 4 0 EQUIPMENT INSPECTION AND HANDLING lt lt x x x x e e e e e eee eee eee eee 18 4 1 Packagina Material o A A WA OR TE E NN a ES 18 SAFETY INFORMATION 0 a a e 18 4 2 Unpacking the Until A A A A 19 4 2 1 Removing the Unit from the Skid With a Forklift o ooo oooooooooooooo 19 4 2 2 Removing the Unit from the Skid Using Rigging 0 ees 20 4 2 3 Moving the Unit With Piano dacs 21 4 3 Placing the Unit on a Floor Stand oc
40. M Chilled Water Coil Reheat optional 1 1 1 REAR VIEW Liebert PDX and Liebert PCW Liebert PDX and Liebert PCW Components and Nomenclature Model Number Part 1 2 Model Details Part 2 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 P XxX 0 2 9 U A 1 A D H E 2 8 0 1 P L 5 F P A 1 2 3 Digit 1 2 Product Family Digit 14 Air filter PX Liebert PDX DX 8 MERV 8 2 with Clogged Filter Sensor PW Liebert PCW CW 9 MERV 11 2 with Clogged Filter Sensor Digit 3 4 5 Cooling Capacity kW Digit 15 Coil Valve amp Pressure Options Nominal Sensible Capacity kW 0 Air Cooled no valve Digit 6 Air Discharge 1 Standard Pressure 2 Way MBV condenser valve U Upflow with front air return 2 High Pressure 2 Way MBV condenser valve 1 C Upflow with bottom air return 7 Standard Pressure 3 Way MBV condenser valve D Downflow discharge into raised floor 8 High Pressure 3 Way MBV condenser valve H Downflow with front air discharge B Standard Pressure Dual Cool Air cooled 1 Downflow with front and right side discharge E High Pressure Dual Cool Air Cooled 2 Downflow with front and right and left side dischar
41. N002970 Rev 0 15 Liebert PDX and Liebert PCW Liebert PDX and Liebert PCW Dimensions and Weights Figure 9 Floor stand dimensions Upflow rear return floor stands 1 25mm Ductwork Flange 31 5 8 804mm 32 5 8 829mm Removable Panel for Filter Access Filter 28 7 8 734mm Duct Flange Opening FRONT Y LE ae 76mm 23mm 12 1 2 318mm Leveling feet are provided with 1 1 2 38mm Duct Flange adjustment from nominal height Opening DPNO0297 1 Rev 1 Liebert PDX and Liebert PCW 16 Liebert PDX and Liebert PCW Dimensions and Weights 3 2 Plenum Dimensions Figure 10 Plenum dimensions Upflow Front Views Check One Rear Views Check One 34 1 2 Piatto M eremm With Grille 4 7 46 _ _ Without Grille H With Grille L Without Grille 77 5 8 1971mm Left Side Views Check One Right Side Views Check One C With Grille with Grille Side View Front View Unit With Plenum Unit With Plenum _ Without Grille Without Grille Notes 1 Typical unit orientation shown with grille plenum Plenum with grille is available only for 18 height plenum Nominal grille size is 24 x 14 609mm x 355
42. PCW Piping Schematics Figure 24 Piping schematic chilled water units LIEBERT PCW and associated piping Bleed Valve Chilled Water Coil 2 Way Chilled Water Factory Piping Field Piping Optional Factory Piping NOTE Schematic representation shown CUSTOMER HEAT REJECTION None i Supply 1 Ud Ee a Tea gt On Valve Shutoff Valve Valve Hose C E Bib Hose Bib o N Optional 3 Way Chilled Water From Liebert iCom Control Components are not supplied by Emerson but are required for proper circuit operation and maintenance DPN002930 Rev 3 This schematic does not imply or define elevations and component location unless specifically noted Liebert PDX and Liebert PCW 46 Piping Schematics Figure 25 Optional piping schematic for Econ O Coil Return Supply Return Supply S Thermistor E Thermistor Actuator Actuator 7 Retu rn Return Liebert Econ O Coil Liebert Econ O Coil Optional Liebert Econ O Coil 2 way valve Optional Liebert Econ O Coil 3 way valve Supplied with 10 ft 3m extra thermistor wire for installation on field supply line FRE Piping Field Piping 1 Place thermistor in location where flow is always present DPN002972 2 Thermistor must be located out of the supply air stream Rev 0 47 Liebert PDX and Liebert PCW Piping Schematics Figure 26 Prima
43. See Figure 37 67 Liebert PDX and Liebert PCW Maintenance Figure 37 Humidifier electric box location Humidifier Electric Humidifier Compartment Wiring Cover Harness 9 Remove the four bolts securing the humidifier assembly to the unit remove the humidifier from the unit 10 Remove the panel located behind the humidifier s previous location This will reveal the panel and make it accessible See Figure 38 Figure 38 Bolt and panel removal Remove the four hex bolts like this one Remove this panel NN Liebert PDX and Liebert PCW 68 Maintenance 10 4 10 4 1 11 Remove the smoke detector tubing from the right side remove the air sail tubing from the left side 12 Remove the high and low voltage wiring supplying the fan 13 Remove the four hex bolts securing the mounting panel to the unit Remove only the bolts indicated in Figure 38 14 Slide the EC fan assembly forward and out of the unit 15 Place the new EC fan assembly in the unit on the mounting rails that supported the old assembly 16 Connect all high voltage and low voltage wiring 17 Secure the new assembly using the same hardware removed in Step 13 18 Reattach smoke detector and air sail tubing removed in Step 11 19 Reinstall the panel removed in Step 10 20 Reinstall the humidifier air blocking panel removed in Step 7 21 Reinstall the humidifier assembly and reconnect the wire harnes
44. VIEW Front of Unit i m T a B 7 L 30 1 2 FRONT VIEW 775mm 28 1 2 725mm f Dimensions from Supply Air rear bottom corner of unit including panels PE CD X RIGHT SIDE VIEW Discharge Opening G a TOP VIEW A of Unit Field pitch condensate drain line a minimum of 1 8 3 2mm per foot 305mm All units contain a factory installed condensate trap Do not trap external to the unit Drain line may contain boiling water Select appropriate drain system materials The drain line must comply with all local codes Supplied on dual cooling systems only DPN002939 Unit with front return shown Bottom return with rear return floor stand also available Rev 1 Connection Size Opening in Point Description X in mm Y in mm PX018 PX023 PX029 L1 Liquid Line System 1 5 1 8 131 25 5 8 652 1 2 5 8 G1 Hot Gas Discharge 1 2 7 8 73 25 5 8 652 5 8 7 8 CD Condensate Drain 16 5 8 422 3 1 4 80 3 4 FPT CDP Condensate Drain with Pump 3 1 4 83 5 7 8 149 1 2 HUM Humidifier Supply Line 29 1 2 750 26 663 1 4 ECS Econ O Coil Supply 4 1 4 111 3 1 4 81 1 1 8 ECR Econ O Coil Return 2 5 8 67 10 256 1 1 8 E1 Electrical Connection High Voltage 31 1 4 794 30 761 7 8 1 3 8 1 3 4 E2 Electrical Connection High Voltage 31 1 4 794 2
45. aintaining system cleanliness is extremely important because the oil will tend to bring any foreign matter back to the compressor NOTICE Risk of improper refrigerant charging Can cause equipment damage Refrigerant charge must be weighed into scroll and digital scroll compressors before they are started Starting scroll and digital scroll compressors without proper refrigerant charging can cause the compressors to operate at less than 5 F 15 C evaporator temperature and at less than 20psig 138kPa Operation for extended periods at less than 20psig 138kPa can cause premature compressor failure Liebert PDX and Liebert PCW 32 Piping 6 2 1 Piping Guidelines Air Cooled Units Indoor unit ships with a nitrogen holding charge do not vent the evaporator until all refrigerant piping is in place ready for connection to the unit and condenser Use copper piping with a brazing alloy with a minimum temperature of 1350 F 732 C such as Sil Fos Avoid soft solders such as 50 50 or 95 5 Use a flow of dry nitrogen through the piping during brazing to prevent formation of copper oxide scale inside the piping When copper is heated in the presence of air copper oxide forms POE oils 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 3ft min 0 5 1 5 l s inside the pipe during brazing
46. alculated Subcooling Elevation Correction Subtract Line 3 Correction for Condenser Elevation above Evaporator from Line 8 Calculated Subcooling to obtain Corrected Subcooling Circuit 1 Line 8 Line 3 li 9 Corrected Subcooling Verification Against MC Condenser Subtract Line 7 MC Condenser Subcooling Reading from Line 9 Corrected Subcooling to obtain Difference Circuit 1 Line 9 Line 7 i 10 Difference If Line 10 Difference value is less than 3 F NO charge adjustment is needed If Line 10 Difference value is greater than 3 F add additional charge If Line 10 Difference value is greater than 3 F remove charge 39 Liebert PDX and Liebert PCW Piping 6 2 4 Air Cooled Liebert MC Condensers with Liebert Lee Temp Flooded Condenser Head Pressure Control System The Liebert Lee Temp system consists of a modulating type head pressure control valve and insulated receiver with heater pad to ensure operation at ambient temperatures as low as 30 F 34 4 C The Liebert Lee Temp system can be used with any Liebert PDX compressor choice Liebert Lee Temp Piping A discharge line and liquid line must be field installed between the indoor unit and the outdoor condenser See Figures 21 through 25 for details Liebert Lee Temp Controlled Materials Supplied e Built in pre wired condenser control box Air Cooled condenser e Piping access cover Bolts
47. ap external to the unit Drain line may contain boiling DPN002942 water Select appropriate drain system materials The drain line must comply with all local codes Point Description X in mm Y in mm Connection Size Opening in WS Water Glycol Supply 2 7 8 73 16 1 4 413 1 1 8 WR Water Glycol GLYCOOL Return 2 7 8 73 27 3 8 694 1 1 8 WSG GLYCOOL Supply 2 7 8 73 7 5 8 195 1 1 8 CD Condensate Drain 32 811 12 1 8 309 3 4 CE Condensate Electrical 31 1 4 796 23 3 4 606 1 1 2 HUM Humidifier Supply Line 32 815 30 1 8 766 1 4 ECS Econ O Coil Supply 2 7 8 73 7 5 8 195 1 1 8 ECR Econ O Coil Return 2 7 8 73 11 3 4 298 1 1 8 El Electrical Connection High Voltage Bottom 31 1 2 801 28 3 8 722 7 8 1 3 8 1 3 4 E2 Electrical Connection High Voltage Bottom 31 1 2 801 26 1 8 665 7 8 1 3 8 1 3 4 E3 Electrical Connection High Voltage Top 31 788 27 3 4 704 7 8 1 3 8 1 3 4 E4 Electrical Connection High Voltage Top 31 788 30 760 7 8 1 3 8 1 3 4 LV1 Electrical Connection Low Voltage Bottom 2 3 4 70 30 1 4 768 1 1 8 LV2 Electrical Connection Low Voltage Bottom 3 7 8 98 29 1 8 740 1 1 2 LV3 Electrical Connection Low Voltage Top 31 5 8 802 24 7 8 631 1 Source DPN002942 Rev 1 Liebert PDX and Liebert PCW 50 Piping Schematics Figure 29 Primary connection locations Liebert PDX dow
48. ble Cause Check or Remedy Unit in call for humidification humidifier will not operate Humidifier not receiving power Verify ON OFF DRAIN switch is in ON position Check fuses or CB s and replace or reset if necessary Humidifier Contactor pulled in but no water enters canister No water available to unit Check external water shut off valves Clogged fill line strainer Clean or replaced fill line strainer Excessive arcing in canister Drain valve clogged or defective Verify that drain valve operates freely when activated Clean valve and replace if defective Flush canister several times and replace if arcing persists Improper water supply If water is commercially softened reconnect humidifier to raw water supply drain canister and restart If connected to hot water supply reconnect to cold water Insufficient drain rate Verify that drain valve operates freely when activated Clean valve and replace if defective Flush canister several times and replace if arcing persists Excessive mineral content in water Analyze mineral content of water If mineral content is excessive contact Liebert Services 75 Liebert PDX and Liebert PCW Maintenance Figure 45 Current Transformer Circuit board diagram PCB is configured for MES L HIGH WATER l K2 150 9591
49. d airflow reduction Pleat direction is non standard Use only short pleat filters Long pleat filters are subject to collapse at high airflows To maximize the performance and reliability of Liebert PDX and Liebert PCW equipment use only Liebert filters Contact your local Emerson representative to order replacement filters Table 16 Filters number and size 017 018 023 029 Downflow Models Quantity 1 Nominal Size inches 29 5 x 28 5x2 Upflow Models Quantity 1 Nominal Size inches 34 x 28x2 Disposable Type Nominal sizes and number required Standard MERV 8 or Optional MERV 11 10 1 1 Filter Replacement Procedure Downflow Units 1 2 3 4 5 6 Disconnect power from the Liebert PDX Liebert PCW Using a stepladder remove filters from the top of the unit Replace with new filter install the filter in the proper direction of the airflow Test the operation of the filter clog switch The unit panels must be in place and closed to find this point Start the blower and turn the switch counterclockwise until the alarm is energized Turn the adjusting knob one turn clockwise or to the desired filter change point 10 1 2 Filter Replacement Procedure Upflow Units 1 2 3 4 5 6 Disconnect power from the Liebert PDX Liebert PCW Open the front access panel and remove the filter Replace with new filter install the filters in the proper direction of the airflow Test the operatio
50. d remote electric power supplies verify with a voltmeter that power is Off and wear appropriate personal protective equipment per NFPA 70E before working within the electric control enclosure Open all local and remote electric power supply disconnect switches and verify with a voltmeter that power is Off before working within the EC fan electric connection enclosure Before proceeding with EC fan removal and or replacement read all instructions verify that all the parts are included and check the EC fan nameplate to be sure the voltage matches the unit nameplate electrical rating The Liebert iCOM microprocessor does not isolate power from the unit even in the Unit Off mode This kit should be installed only by properly trained and qualified personnel A WARNING Risk of contact with high speed rotating blower wheel fan blades Can cause injury or death Open all local and remote electric power supply disconnect switches verify with a voltmeter that power is Off and verify that the blower wheel has stopped rotating before working within the unit A WARNING Risk of very heavy fan module dropping downward suddenly Can cause injury or death Only properly trained and qualified personnel should work on this equipment The fan module weighs approximately 100 lb 45 4kg A CAUTION Risk of contact with hot surfaces Can cause burn injury The EC fans and electronics housing are extremely hot during operation Allow sufficient t
51. densers N l Condensers Models Without Liebert Lee Temp With Liebert Lee Temp MCS028 2 5 1 2 18 3 8 4 MCM040 3 5 1 6 19 3 8 8 MCLO55 5 0 2 3 24 2 11 0 MCM080 8 5 3 8 39 6 18 1 MCL110 10 7 4 9 49 0 22 2 MCL165 18 4 8 4 79 9 36 2 Source DPN002411 Rev 6 6 2 2 Scroll and Digital Scroll Additional Oil Requirements System charges over 40 lb 18 1kg per circuit may require additional oil charge to be added See Table 12 for the amount required for various system charge levels After the system has been fully charged with refrigerant use a hand pump to add the additional oil at the suction side of the system while the system is running The amount of oil added by field service must be recorded on the tag marked Oil Added Field Service Record attached to each compressor The date of oil addition must be included as well Table 12 Additional oil required per refrigerant charge System Charge Per Circuit Ib kg 40 Ib 60 Ib 80 Ib 100 Ib 120 Ib 140 Ib 160 Ib 180 Ib 200 Ib 18 1kg 27 2kg 36 3kg 45 4kg 54 4kg 63 5kg 72 6kg 81 6kg 90 7kg Model Additional Oil Required Per Circuit Ounces Grams PX018 8 12 16 20 24 28 32 36 40 PX023 8 12 16 20 24 28 32 36 40 PX029 12 18 24 30 36 42 48 54 60 For system charges over 200 Ib 90 7kg consult your Emerson representative NOTICE Risk of improper compressor
52. e unit 12 Turn On the main unit disconnect switch 13 Press the On button 14 Check and record the current draw on all line voltage components and match with serial tag NOTE Q Electric Reheat See Caution on page 59 Activate for a minimum of five 5 minutes 15 Check for unusual noises and vibration Note observations on the warranty inspection form s comments section 16 Check all refrigerant and water lines for leaks Note observations on warranty inspection form 17 Record all of the following on the warranty inspection form All component voltages and current draws All air water temperatures indoor and outdoor All refrigerant and water glycol pressures All levels of refrigerant and oil in sight glasses Record refrigerant pressure switch settings and operating pressures Record superheat and subcooling NOTE Unit superheat should be in the range of 10 to 20 F 12 to 6 C 18 Test all control sequences and functions of your unit for proper operation Use Liebert iCOM user manual as a guide to system control operations 19 Complete the warranty inspection form with sign off data Return Completed Startup Form to Your Local Emerson Sales Office Local Emerson sales offices and air product support contacts can be found on the Liebert Web site www liebert com or call 1 800 LIEBERT for Thermal Management product support Liebert PDX and Liebert PCW 62 Maintenance 10 0 MAINTENANC
53. ection Drain lines must be inspected regularly and maintenance must be performed to ensure that drain water runs freely through the drain system and that lines are clear and free of obstructions and in good condition with no visible sign of damage or leaks This unit may also require an external water supply to operate Improper installation application and service practices 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 water damage Emerson recommends installing a monitored fluid detection system to immediately discover and report coolant fluid system and condensate drain line leaks Liebert PDX and Liebert PCW 2 Important Safety Instructions NOTICE Risk of a leaking coolant fluid system due to freezing and or corrosion can cause equipment and very expensive building damage Cooling coils heat exchangers and piping systems that are connected to open cooling towers or other open water glycol systems are at high risk of freezing and premature corrosion Fluids in these systems must contain the proper antifreeze and inhibitors to prevent freezing and premature coil piping and heat exchanger corrosion The water or water glycol solution must be analyzed by a competent local water treatment specialist before startup to establish the inhibitor and antifreeze solution requirem
54. efrigerant Level On the receiver at the condenser are two refrigerant level sight glasses Refrigerant level will vary with outside temperature Check refrigerant level after the unit has been on for at least 15 minutes Sight Glass Levels 40 F 4 5 C and lower bottom sight glass is 3 4 full 40 to 60 F 4 5 to 15 5 C bottom sight glass is full 60 F 15 5 C and higher top sight glass is 3 4 full 41 Liebert PDX and Liebert PCW Piping 6 3 Fluid Connections for Systems Using Water Glycol and Chilled Water These guidelines apply to field leak checking and fluid requirements for field piping systems including Liebert chilled water hot water condenser water or glycol GLYCOOL and drycooler circuits General Guidelines Equipment damage and personal injury can result from improper piping installation leak checking fluid chemistry and fluid maintenance Follow local piping codes safety codes Qualified personnel must install and inspect system piping Contact a local water consultant regarding water quality corrosion protection and freeze protection requirements Install manual shutoff valves at the supply and return line to each indoor unit and drycooler to permit routine service and emergency isolation of the unit Install a 16 20 mesh strainer on the water glycol supply to the Liebert PDX water glycol or GLYCOOL units The strainer is needed to prevent particles in the water from entering the unit
55. ent and at regularly scheduled intervals throughout the life of the system to determine the pattern of inhibitor depletion The complexity of water glycol solution condition problems and the variations of required treatment programs make it extremely important to obtain the advice of a competent and experienced water treatment specialist and follow a regularly scheduled coolant fluid system maintenance program Read and follow individual unit installation instructions for precautions regarding fluid system design material selection and use of field provided devices Liebert systems contain iron and copper alloys that require appropriate corrosion protection It is important to have the system running with flow through exchangers maintained at initial system fill for 24 to 48 hours depending on size and system configuration Water chemistry varies greatly by location as do the required additives called inhibitors that reduce the corrosive effect of the fluids on the piping systems and components The chemistry of the water used must be considered because water from some sources may contain corrosive elements that reduce the effectiveness of the inhibited formulation Sediment deposits prevent the formation of a protective oxide layer on the inside of the coolant system components and piping The water coolant fluid must be treated and circulating through the system continuously to prevent the buildup of sediment deposits and or growth of sulfate reduc
56. er valve position on downflow units or for monitoring only on upflow or downflow units The supply sensor must be installed 5 15 ft 1 5 4 5m from the unit to provide an accurate reading A 50 ft 15m extension cable P N 186978G5 is available if the sensor must be farther than 15 ft 4 5m from the Liebert iCOM See the Liebert iCOM user manual SL 18835 for more information on supply air temperature monitoring control or limit setup The manual is available at Liebert s Web site www liebert com 29 Liebert PDX and Liebert PCW Piping 6 0 PIPING 6 1 6 1 1 All fluid and refrigeration connections to the unit with the exception of the condensate drain are sweat copper Factory installed piping brackets must not be removed Field installed piping must be installed in accordance with local codes and must be properly assembled supported isolated and insulated Avoid piping runs through noise sensitive areas such as office walls and conference rooms Refer to specific text and detailed diagrams in this manual for other unit specific piping requirements All piping below the elevated floor must be located so that it offers the least resistance to air flow Careful planning of the piping layout under the raised floor is required to prevent the air flow from being blocked When installing piping on the subfloor it is recommended that the pipes be mounted in a horizontal plane rather than stacked one above the
57. erse order N NOTE Be cautious when putting the spring back into the plunger the taper end of the spring must be installed toward the solenoid 73 Liebert PDX and Liebert PCW Maintenance 10 Hand tighten the actuator back into place then secure it by using a wrench to turn it a quarter of a turn 11 Clean out the end of the hose then reconnect it to the drain valve body with the clamp 12 Fit mounting screws back through the drain valve body one through ring terminal on the green wire Figure 43 Drain valve assembly Actuator Plunger Spring Pe J Male Slip On Connection Tabs E tenia Holding Coil Installing the New Canister 1 The reverse procedure should be followed to install a new cylinder The main electrical disconnect is to be left open until the cylinder is completely installed and reconnected 2 The blue sensor plug on all units is for the high water sensor pin which always goes on the single pin with collar offset from the others See Figure 44 3 Ensure that cylinder plugs are snug on the pins Replace any loose fitting plugs as these may result in hazardous operation Figure 44 Canister plugs High Water Sensor Pin 38 Cylinder O Cylinder Pin Y Pin Q Cylinder Pin A WARNING Risk of humidifier canister meltdown smoke and fire Can cause fire suppression system activation fire and smoke alarm activation building evacuation dispatching of fire and re
58. ert PCW 42 Piping Schematics 7 0 PIPING SCHEMATICS Figure 21 LIEBERT MC CONDENSER Optional Field Installed Fusible Plug CONDENSER COIL Hot Gas Discharge RAN LIEBERT PDX AND ASSOCIATED PIPING Liquid Digital Solenoid Valve Sensing Bulb Suction External Compressor Service Equalizer Valve Expansion Solenoid Sight Valve Valve Glass Refrigerant Piping Field Piping Piping schematic Air cooled models Filter Drier LIEBERT MC CONDENSER WITH LIEBERT LEE TEMP RECEIVER Relief Valve Service Head Pressure LIEBERT LEE TEMP RECEIVER Control Valve CONDENSER COIL y Hot Gas Discharge EVAPORATOR COIL For rises over 25ft 7 6m trap every 20ft 6m or evenly divided Trap at base of risers over 5ft 1 5m Isolation Valve Hot Gas Discharge El Isolation Valve Liquid Return Components are not supplied by Emerson but are required for proper circuit operation and maintenance V Service Schrader Access Connection No Valve Core y Service Schrader Access Connection With Valve Core DPN002929 Schematic representation shown Do not use for specific connection locations Rev 2 43 Liebert PDX and Liebert PCW Piping Schematics Figure 22 Piping schematic Water glycol models For systems with drycoolers refer to 10 15 Drycooler Settings LIEBERT CUSTOMER HEAT REJECTION HEAT REJECTION Cooling T
59. essure and temperature measuring instruments should be capable of measuring to 10 psig 103 4kPa and 2 F 1 1 C for best subcooling measurement 1 Check indoor nameplate for refrigerant type to be used Unit control configurations differ depending on refrigerant type 2 Refrigerant charging requires unit operation Refer to the indoor unit s user manual for details regarding indoor unit operation and to the Liebert MC user manual SL 19536 available at the Liebert Web site www liebert com for the Liebert MC condenser operation 3 Calculate the amount of charge for the system Refer to the indoor unit user manual and to the condenser and refrigerant line charge data in the Liebert MC user manual SL 19536 available at the Liebert Web site 4 Accurately weigh in as much of the system charge as possible before starting the unit Do not exceed the calculated charge by more than 0 5 lb 23kg 35 Liebert PDX and Liebert PCW Piping NOTICE Risk of improper refrigerant charging Can cause equipment damage Refrigerant R 410A is a blended refrigerant and must be introduced and charged from the cylinder only as a liquid When adding liquid refrigerant to an operating system it may be necessary to add the refrigerant through the compressor suction service valve Care must be exercised to avoid damage to the compressor Emerson recommends connecting a sight glass between the charging hose and the compressor sucti
60. external traps also although unintentional Lines must be rigid enough not to bow over top of other objects INCORRECT DPNO001556 Rev 0 1 2 copper connection is provided on units with optional factory installed condensate pump 208V condensate pump rated for 5 GPM at 45 ft 18 9 m at 13 7m of total head pressure 230V condensate pump rated for 5 GPM at 48 ft 18 91 m at 14 6m of total head pressure 460V condensate pump rated for 5 GPM at 40 ft 18 91 m at 12 2m of total head pressure Size piping based on available condensate head NOTE Condensate pumps are factory installed on upflow units they are shipped separately to be field installed on downflow units 31 Liebert PDX and Liebert PCW Piping 6 1 2 Humidifier Supply Water Optional Infrared 1 4 supply line maximum water pressure is 150 psi 1034kPa Size humidifier supply line for 1 gpm 3 8 I m with a minimum water pressure of 20 psi 138kPa Do not supply de ionized water to the humidifier 6 1 3 Humidifier Supply Water Optional Steam Generating 1 4 supply line maximum water pressure is 145psi 1000kPa Fill valve is sized for pressure range of 30 to 120psi 207 827kPa Do not supply steam generating humidifier with softened water Do not use hot water source Water conductivity must be in the range of 330 750 micro siemens 6 2 Refrigeration Piping Air Cooled Units A WARNING Risk of explosive discharge from high
61. f drain switch to the Drain position 3 When completely drained push the auto On Off Drain switch to the Off position Open the main electrical disconnect during the entire cylinder change operation 5 The power wires to the cylinder are attached by cylinder plugs to the electrode pins on top of the cylinder Pull up to remove the plugs from the pins 6 Use slotted screwdriver to loosen the steam hose clamp s 7 Disconnect the steam hose by pulling it straight up 8 Loosen the reversible cylinder zip tie gt The cylinder is now ready to be lifted out of the unit Figure 42 Removing the old canister Mandatory Cleaning of the Drain Valve Always clean the drain valve before installing a new cylinder Figure 43 shows an exploded view of the drain valve for reference to clean it 1 Remove old cylinder as previously described 2 Note that the ring terminal for the drain valve green ground wire is sandwiched between the drain valve and the drain pan Remove the two screws securing the drain valve body to the drain pan Remove the hose clip and hose connection from the drain valve body Drain valve assembly is now free to be taken to a sink for disassembly and cleaning Remove the snap fit red cap from the coil assembly and slide the coil off the actuator Loosen actuator using a wrench and unscrew from the plastic body Clean the exposed core spring and plastic drain valve pot Rr 00 Sl 99 Ot 1200 Reinstall in the rev
62. g a continuity meter locate burned out lamp Remove lamp brackets under lamps Loosen two screws securing lamp lead wires to junction block Pull bulb straight down and discard Wrap lead wires once around new lamp s metal ends This will support lamp and allow for thermal expansion Insert lead wires into junction block and torque screws to 30 in lb 10 Reassemble by reversing Steps 1 through 9 SUS Orie 00 bo Figure 40 Infrared humidifier lamps Infrared Bulbs 10 5 Humidifier Steam Generating The humidifier drains and refills to maintain a current setpoint and alert the operator when the humidifier canister needs to be replaced Liebert PDX and Liebert PCW 70 Maintenance Figure 41 Steam generating humidifier canister 71 Liebert PDX and Liebert PCW Maintenance 10 5 1 Replacing the Steam Generating Humidifier Canister A A A A WARNING Arc flash and electric shock hazard Can cause injury and death Open all local and remote electric power supplies verify with a voltmeter that power is Off and wear appropriate personal protective equipment per NFPA 70E before working within the electric control enclosure Open all local and remote electric power supply disconnect switches and verify with a voltmeter that power is Off before working within the humidifier enclosure or disconnecting the canister power wires Before proceeding with caniste
63. ge Digit 16 Enclosure options 3 Downflow with front and left side discharge 1 No options Digit 7 System Type C Double skin panels A Air Cooled 3 IBC OSHPD bracing 2 W Water Glycol Cooled 8 Double skin panels and IBC OSHPD 2 G GLYCOOL Digit 17 High Voltage Options C Chilled Water M Locking Disconnect 65kA No condensate pump D Dual Cool Air Cooled FC Coil 3 Way FC Valve P Locking Disconnect 65kA with condensate pump H Dual Cool Water Glycol Cooled FC Coil 3 Way FC Valve Digit 18 Low Voltage Option Packages 2 Dual Cool Air Cooled FC Coil 2Way FC Valve 0 None 3 Dual Cool Water Glycol Cooled FC Coil 2 Way FC Valve L Terminal Package Digit 8 Airflow fan type H Reheat amp Humidifier Lockout 1 EC plug fans R Remote Humidity Contact Digit 9 Power Supply C Term Pkg and R H lockout A 460V 3ph 60Hz D Term Pkg and remote humidifier contact B 575V 3ph 60Hz E Term Pkg and R H lockout and remote humidifier contact C 208V 3ph 60Hz F Remote humidifier contact plus R H lockout D 230V 3ph 60Hz Digit 19 Monitoring Cards 2 380 3ph 60Hz 0 No Cards Digit 10 Cooling System U One Liebert IntelliSlot IS UNITY DP Card S Standard Scroll w TXV no sound jacket C One Liebert IntelliSlot IS 485EXI D Digital Scroll w TXV no sound jacket 6 One IS Unity DP and IS 485EXI P Digital Scroll w EEV no sound jacket 3 7 Two Liebert IntelliSlo
64. ge header of the condenser Seat the service valve approximately two 2 turns from the fully back seated position 3 Connect refrigerant gauges to the suction rotalock valves and discharge line Schrader valve see Note above on the compressor 4 Open the service valves and place a 150 psig 1034kPa of dry nitrogen with a tracer of refrigerant Check system for leaks with a suitable leak detector 5 After completion of leak testing release the test pressure per local code and pull an initial deep vacuum on the system with a suitable pump 6 After four hours check the pressure readings and if they have not changed break vacuum with dry nitrogen Pull a second and third vacuum to 500 microns or less Recheck the pressure after two hours 7 Remove the jumper hose installed previously from between the service valve fitting and the condenser After completing this step proceed to Liebert Lee Temp Charging Liebert PDX and Liebert PCW 40 Piping Liebert Lee Temp Charging 1 2 Check unit nameplate for refrigerant type to be used Unit control configurations differ depending on refrigerant type Refrigerant charging requires unit operation Refer to 8 0 Checklist for Completed Installation Calculate the amount of charge for the system Refer to the unit condenser and refrigerant line charge data in Tables 9 10 and 11 Weigh in as much of the system charge as possible before starting the unit NOTICE
65. iebert DCW Component locations Upflow Liebert PDX 0 ao Component locations Upflow Liebert PO W o o ooooooooo ooo Cabinet and floor planning dimensions downflow 0 cent eees Cabinet and floor planning dimensions front discharge downflow o oooooooo Cabinet and floor planning dimensions Upflow ooooccooooooooo eenes Floor stand dimensions Downflow and upflow front return floor stands Floor stand dimensions Upflow rear return floor stands o ooooooooooooo o Plenum dimensions Upflow 0 0 00 ccc eee eee en ee ee eens Equipment recommended for handling Liebert PDX and Liebert PCW Removing packaging oes esty rer eea RN ed ood RT hehe Hae Go eta ay ge R R die Remove the unit from the skid with a forklift 0 0 0 0 00 eee eens Remove the unit from the skid with rigging 0 teenies Moving the unit with piano jacks ee ee eee eens Electrical field connections Upflow and downflow models 000 cee eee eens CANbus communication and interlock connections between Liebert PDX and Liebert MC NA Electrical field connections for Liebert iCOM Downflow models nunuu na Electrical field connections for Liebert iCOM Upflow models Gravity A ATAOE an So 2 EA a T H RA aT EH HA Piping schematic Air cooled modela Piping schematic Water glycol models 0 cee cnet ee eee Piping schema
66. igh and low voltage wiring connections are tight 6 Confirm that unit is properly grounded to an earth ground ___ 7 Control transformer setting matches incoming power 8 Electrical service conforms to national and local codes ___9 Check blowers and compressors for proper rotation 10 Check for loose electrical connections on steam generating humidifier Confirm that electrode plugs are pressed firmly onto the electrode pins 8 3 Piping __ 1 Piping completed to refrigerant or coolant loop if required __ 2 Piping has been leak checked evacuated and charged if required 3 Additional oil has been added for system charges over 40 pounds 18 1kg per circuit see 6 2 2 Scroll and Digital Scroll Additional Oil Requirements Piping is properly sized sloped and trapped as shown in the piping schematics 5 Check piping inside and outside of equipment for proper support and adequate spacing to prevent rub through 6 Ensure TXV equalizer lines and sensing bulb lines have sufficient clearance and do not rub against other refrigerant lines 7 Ensure that factory clamps have been reinstalled a Drain line connected and pitched per local code __ 9 Water supply line connected to humidifier 10 Water coolant fluid supply and condensate humidifier drain line piping has no leaks or visible damage 57 Liebert PDX and Liebert PCW Checklist for Completed Installation 1 Ducting complete if required
67. ime for them to cool before handling Use extreme caution and wear OSHA approved safety glasses and thermally insulated gloves and arm protection when replacing or performing maintenance on the EC fans 1 Turn off the Liebert PDX PCW with the I O button on the Liebert iCOM Allow the unit shut down Once shutdown is complete turn the disconnect switch to the Off position 3 Open the front of the unit 4 Remove the humidifier drain line by removing it from the T connection on the left side of the unit and disconnecting it from the humidifier pan Then pull it up through the humidifier air blocking panel it passes through See Figure 36 Liebert PDX and Liebert PCW 66 Maintenance Figure 35 Remove the humidifier drain line Humidifier Drain tdk T Connection El 1 7 m lt m z S 4 gt N 5 Remove the humidifier high limit wires connected to the humidifier high limit located on the bottom of the humidifier pan See Figure 36 n Figure 36 Remove humidifier high limit wires Humidifier High Limit Humidifier Wires Pan Air Blocking Panel Actuator 6 Disconnect the actuator from the pipe beneath the right side of the humidifier if present See Figure 36 7 Remove the humidifier air block off panel See Figure 36 8 Locate the humidifier assembly and remove the cover to the electrical compartment Disconnect the wires entering the humidifier electric box from the left side
68. in 10 of nameplate voltage 4 Turn On the main unit disconnect switch and check secondary voltage at transformer T1 Voltage at T1 must be 24VAC 2 5VAC check at TB1 1 and TB1 5 T1 voltage must not exceed 28VAC Change primary tap if necessary 5 Push the On button Blower will start and the On lamp will light 6 Check fan rotation if not correct make necessary changes to the line side of the unit disconnect with power Off The unit is phased at the factory 7 Unit will operate at the factory set configuration for all component operations The operator may set the values for temperature and humidity setpoints the proportional band and the deadband The user menu may be used to set alarms and other control functions Refer to the Liebert iCOM user manual SL 18835 for large or small display operation and settings NOTICE Risk of improper Liebert iCOM operation Can cause damage to equipment Do not change Advanced Menu parameter settings in the Liebert iCOM without first getting permission from Emerson Network Power Liebert Services Lowering this parameter to less than 100 will cause the coil to freeze on DX units will overheat the reheat components on any unit and cause condensation problems on any unit equipped with a humidifier 8 Turn Off the unit with the On Off button 9 Remove power from main unit disconnect and main breaker and check with a meter 10 Replace all fuses removed in Step 2 11 Restore power to th
69. ing bacteria Proper inhibitor maintenance must be performed in order to prevent corrosion of the system Consult glycol manufacturer for testing and maintenance of inhibitors Commercial ethylene glycol when pure is generally less corrosive to the common metals of construction than water itself It will however assume the corrosivity of the water from which it is prepared and may become increasingly corrosive with use if not properly inhibited NOTICE Risk of no flow condition Can cause equipment damage Do not leave the unit in a no flow condition Idle fluid allows the collection of sediment that prevents the formation of a protective oxide layer on the inside of tubes Keep unit switched On and system pump operating continuously NOTICE Risk of damage from forklift Can cause unit damage Keep tines of the forklift level and at a height suitable to fit below the skid and or unit to prevent exterior and or underside damage NOTICE Risk of improper storage Can cause unit damage Keep the Liebert PDX and Liebert PCW upright indoors and protected from dampness freezing temperatures and contact damage 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 3 Liebert PDX and Liebert PCW Liebert PDX and Liebert PCW Components and Nomenclature 1 0 LIEBERT PDX
70. inhibitors Commercial ethylene glycol when pure is generally less corrosive to the common metals of construction than water itself It will however assume the corrosivity of the water from which it is prepared and may become increasingly corrosive with use if not properly inhibited NOTICE Risk of no flow condition Can cause fluid leaks from tubing and piping corrosion resulting in expensive equipment and building damage Idle fluid allows the collection of sediment that prevents the formation of a protective oxide layer on the inside of tubes Keep unit switched ON and system pump operating Leak Checking of Unit and Field Piping Liebert unit fluid systems are factory checked for leaks and may be shipped with a nitrogen holding charge Liebert unit fluid circuits should be checked for leaks at installation as described below NOTE Emerson recommends isolating the unit be isolated with field installed shutoff valves during leak checking of field installed piping When the Liebert units are included in a leak test use of fluid for pressure testing is recommended When pressurized gas is used for leak testing the Liebert unit the maximum recommended pressure is 30 psig 207kPa and tightness of the unit should be verified by pressure decay over time lt 2 psig hour 13 8kPa hour or sensing a tracer gas with suitable instrumentation Dry seals in fluid valves and pumps may not hold a high gas pressure Liebert PDX and Lieb
71. ions 84 amp 85 Optional Condensate Alarm Dual Float Condensate Pump only Relay terminals located in field wiring compartment for remote indication Class 1 wiring to connections 88 amp 89 Optional Remote Liebert Liqui tect Indicator Optional remote Liebert Liqui tect indicator for unit shutdown Terminals located in field wiring compartment Field to connect 24V maximum Class 1 wiring to connections 58 amp 59 Optional Analog Inputs 3 4 Customer connection to Terminals 41 42 43 44 for analog inputs Spare Terminals for Optional Devices Customer connection when optional device is supplied See unit schematic Heat Rejection CANBUS Connection AIR Units only Customer connection to terminals 49 1 49 3 and SH NOTE CANbus wiring is required to access all system and Liebert COMP functions when using the Liebert MC Premium Efficiency Control Condenser See Liebert MC manual SL 19536 for additional CANBUS wiring details The manual ships with the unit and is available at Liebert s Web site www liebert com 25 Liebert PDX and Liebert PCW Electrical Connections CANbus communication and interlock connections between Liebert PDX and Liebert MC premium Figure 17 J6 Termination Jumper must be set to Pins 1 and 2 J6 e CANbus Addressing Switch CONDENSER DETAIL1 CAN Cable Connection A
72. it See Table 2 for unit weights Confirm that the room is properly insulated and has a sealed vapor barrier For proper humidity control keep outside or fresh air to an absolute minimum less than 5 of total air circulated in the room Do not install a Liebert PDX and Liebert PCW in an alcove or at the end of a long narrow room Install the units as close as possible to the largest heat load Allow at least the minimum recommended clearances for maintenance and service See Figures 5 through 22 for dimensions Emerson recommends installing an under floor water detection system Contact your local Emerson representative for information 2 2 Air Distribution Downflow Units Verify that the raised floor has been properly sized for the unit s airflow and the room is free of airflow restrictions Perforated floor tiles in the raised floor should ensure minimal pressure loss The raised floor must provide 7 1 2 191mm of clearance Ensure that there is adequate clearance above the unit for service such as replacing filters 2 3 Air Distribution Upflow Units For in room applications with supply and return grilles several feet of clearance must be maintained at the intake and discharge of the unit 2 4 Connections and System Setup Plan the routing of wiring piping and ductwork to the unit See Figures 16 through 34 for unit connection locations Water glycol and GLYCOOL units utilizing a drycooler may require an optional
73. jury Only properly trained personnel wearing appropriate safety headgear gloves shoes and glasses should attempt to move the unit lift it remove packaging or prepare the unit for installation NOTICE Risk of doorway interference The unit may be too large to fit through a doorway while on the skid Measure the skid unit and doorway and refer to the installation plans to verify clearances before moving the unit NOTICE Risk of damage from forklift Can cause unit damage Keep tines of the forklift level and at a height suitable to fit below the skid and or unit to prevent exterior and or underside damage NOTICE Risk of improper storage Keep the Liebert PDX and Liebert PCW upright indoors and protected from dampness freezing temperatures and contact damage Figure 11 Equipment recommended for handling Liebert PDX and Liebert PCW Spreader OY Bars Slings Forklift Pallet Jack Transport the Liebert PDX and Liebert PCW with a forklift or pallet jacks whenever possible If that is not possible use a crane with belts or cables slings and spreader bars If using a forklift or pallet jack make sure that the forks if adjustable are spread to the widest allowable distance that will fit under the skid Liebert PDX and Liebert PCW 18 Equipment Inspection and Handling 4 2 Unpacking the Unit Remove outer packaging when ready to install the unit 1 Remove the exterior stretch wrap packaging
74. l valves may be controlled through the Service menu using manual mode to override the normal control Liebert PDX and Liebert PCW 80 Maintenance 10 15 Drycooler Settings Applications with the Optional Stat Setting require field piping to be insulated to prevent condensation Table 21 shows acceptable applications where stats must be adjusted to Optional Setting Aquastats must be field adjusted to Optional Setting for GLYCOOL Dual Cool applications Single Drycooler loops with motor ball valve flow controls Table 21 Water glycol system conditions requiring optional settings for aquastats Cooling Type GLYCOOL Glycol Flow Control MBV MBV Drycoolers in Loop 1 Multiple 1 Multiple Stat Setting Optional Optional Optional Factory Insulate Field Piping Yes Yes Yes No See Table 22 MBV motor ball valve WRV water regulating valve Table 22 Aquastat settings two fan through four fan drycoolers Dial Setting Stat Open Temp Set for Mid Differential 8 F 4 4 C Rise to Close Factory Setting Optional Setting Aquastat Fans Glycol see Notes 1 and 2 GLYCOOL see Note 3 AQ1 F1 65 F 18 3 C 35 F 1 7 C AQ2 F2 amp F3 75 F 23 9 C 45 F 7 2 C AQ3 F4 70 F 21 1 C 40 F 4 4 C NOTE Q 1 All drycoolers are shipped at Factory Setting 2 Factory Setting is used for all glycol applications except single drycooler loops with motor ball va
75. lve controls 3 Stats must be field adjusted to Optional Setting for GLYCOOL Dual Cool applications and all single drycooler loops using motor ball valve flow controls 81 Liebert PDX and Liebert PCW HVAC Maintenance Checklist 11 0 HVAC MAINTENANCE CHECKLIST Source DPN002952 Rev 0 Inspection Date Job Name Indoor Unit Model Indoor Unit Serial Number Condenser Drycooler Model Condenser Drycooler Serial o o Room Temperature Humidity Ambient Temperature Not all units will have all components To determine your unit s configuration compare the Indoor Unit Model above and the information in 1 0 Liebert PDX and Liebert PCW Components and Nomenclature Filters __ 1 Check replace filters 2 Grille area unrestricted __ 3 Wipe section clean __4 Coil clean Blower Section __ 1 Blower wheels free of debris __ 2 Check motor mount __ 3 Motor amp draw L1 L2 L3 Compare to nameplate amps Reheat 1 Inspect elements ___ 2 Check wire connections inside reheat box __ 3 Reheat amp draw _ a 1 __ a 2 __ a 8 Steam Generating Humidifier __ 1 Check drain valve drain lines trap for clogs _ 2 Check water make up valve and all hoses for leaks 3 Clean the fill strainer ___ 4 Replace humidifier bottle if necessary ___ 5 Check operation of humidifier 6 Humidifier amp draw L1 L2 L3 Infrared Humidifier 1 Check drain lines and
76. ly with all local codes DPN002946 Rev 0 Point Description X in mm Y in mm Z in mm Connection Size Opening in HWR Hot Water Reheat Return Optional 2 7 8 73 7 5 8 195 3 76 5 8 HWS Hot Water Reheat Supply Optional 2 7 8 73 11 3 4 298 3 76 5 8 WS Water Supply 2 7 8 73 24 3 4 629 3 76 1 1 8 WR Water Return 2 7 8 73 27 3 8 695 3 76 1 1 8 CD Condensate Drain 21 1 8 537 3 76 3 4 CE Condensate Electrical 22 3 4 606 2 3 4 70 1 1 2 HUM Humidifier Supply Line 20 508 2 1 2 64 1 4 El Electrical Conn High Voltage Top 31 788 27 3 4 704 7 8 1 3 8 1 3 4 E2 Electrical Conn High Voltage Top 31 788 30 760 7 8 1 3 8 1 3 4 LV1 Electrical Conn Low Voltage Top 31 5 8 802 24 7 8 631 1 Source DPN00294 Rev 0 53 Liebert PDX and Liebert PCW Piping Schematics Figure 32 Primary connection locations Liebert PDX air cooled upflow models NOTE Drawing not to scale Tolerance on all piping dimensions is 1 2 13mm lw 34 1 2 All dimensions from a i 876mm x rear corner of unit yO including panels E E i le y Ca Y al I ECS CDP ECR 32 1 2 E 828mm 4 HUM o6 0 PO E2 E1 LV2 U 7 LV TOP
77. maintain access to filters 2 Filters installed 3 Check fasteners that secure compressors reheats humidifier and motors some may have become loose during shipment Verify water detection is properly installed around all units recommended Control panel DIP switches are set based on user requirements Blower system rotates freely 4 5 6 7 Remove rubber band from float in optional infrared humidifier 8 Seal openings around piping and electrical connections 9 Installation materials and tools have been removed from equipment literature shipping materials construction materials tools etc 10 Locate blank startup sheet ready for completion by installer or startup technician Liebert PDX and Liebert PCW 58 Initial Startup Checks and Commissioning Procedure for Warranty Inspection 9 0 INITIAL STARTUP CHECKS AND COMMISSIONING PROCEDURE FOR WARRANTY INSPECTION A WARNING Arc flash and electric shock hazard Open all local and remote electric power disconnect switches verify with a voltmeter that power is Off and wear personal protective equipment per NFPA 70E before working within the electric control enclosure Failure to comply can cause serious injury or death Before proceeding with installation read all included installation operating and safety instructions verify that all the parts are included and check the nameplate to be sure the voltage matches available utility power Follow
78. material from around the unit exposing the protective corner and side packaging planks 2 Remove the corner and side packaging planks from the unit exposing the bag over the unit 3 Remove the bag from the unit when ready to remove the skid and install the unit Figure 12 Removing packaging a dE Z Moj LF LH gt Step 1 Step 2 Step 3 318627P1 Pg 1 Rev 0 4 2 1 Removing the Unit from the Skid With a Forklift A WARNING Risk of improper moving Can cause equipment damage injury or death Ensure that the tines are level not angled up or down The tines must be at a height that will allow proper clearance under the unit Ensure that the tines extend beyond the opposite side of the unit The forklift tines must be equally spaced on either side of the center of gravity indicator see Figure 14 Improper spacing or placement of the tines may cause the unit to tip and fall 1 Remove the panels from the unit Remove the four bolts attaching the unit to the skid they are inside unit base 3 Align a forklift so the tines can be inserted under the unit Use the center of gravity indicators on the unit panels when determining the entry points for the tines 4 Insert the tines of the forklift completely under the base of the Liebert PDX or Liebert PCW 5 Lift the unit off the skid no more than 6 152mm
79. mental Systems 800 543 2778 Outside the United States 614 888 0246 Locations United States 1050 Dearborn Drive P O Box 29186 Columbus OH 43229 Europe Via Leonardo Da Vinci 8 Zona Industriale Tognana 35028 Piove Di Sacco PD Italy 39 0499719111 Fax 39 049 5841 257 Asia 29 F The Orient Square Building F Ortigas r Road Ortigas Center Pasig City 1605 Philippines 63 2 687 6615 Fax 63 2 730 9572
80. mm 2 All plenums are shipped flat and must be field assembled DPNO02981 3 Unit with front return shown Bottom return with rear return Rev 1 floor stand also available Table 7 Upflow unit plenum dimensions H Height in mm 18 457 24 609 30 762 36 914 42 1066 48 1219 17 Liebert PDX and Liebert PCW Equipment Inspection and Handling 4 0 EQUIPMENT INSPECTION AND HANDLING Upon arrival of the unit and before unpacking it verify that the labeled equipment matches the bill of lading Carefully inspect all items for damage either visible or concealed For initial access use a 7 32 Allen wrench for panel removal Damage should be immediately reported to the carrier and a damage claim filed with a copy sent to Emerson Network Power or to your sales representative 4 1 Packaging Material All material used to package this unit is recyclable Please save for future use or CAY dispose of the material appropriately R O SAFETY INFORMATION KT Risk of top heavy unit falling over Can cause equipment damage injury or death Read all of the following instructions and verify that all lifting and moving equipment is rated for the weight of the unit before attempting to move lift remove packaging from or prepare the unit for installation Unit weights are specified in Tables 3 4 and 5 A CAUTION Risk of sharp edges splinters and exposed fasteners Can cause personal in
81. n of the filter clog switch The unit panels must be in place and closed to find this point Start the blower and turn the switch counterclockwise until the alarm is energized Turn the adjusting knob one turn clockwise or to the desired filter change point 10 2 Blower Drive System EC Fans 10 2 1 Fan Impellers and Bearings Fan impellers should be periodically inspected and any debris removed Check to ensure that the impellers can rotate freely and that the fan guards are still properly mounted for sufficient protection against accidentally contacting the impeller Bearings used on the units are maintenance free Consult the factory for more information Liebert PDX and Liebert PCW 64 Maintenance 10 2 2 Protective Features Monitoring functions protect the motor against overtemperature of electronics overtemperature of motor and incorrect rotor position detection With any of these failures an alarm will display through the Liebert iCOM and the motor stops electronically There is no automatic restart The power must be switched off for a minimum of 20 seconds once the motor is at a standstill The motor also provides locked rotor protection undervoltage phase failure detection and motor current limitation These conditions will display an alarm through the Liebert iCOM A A WARNING Risk of electric shock Can cause serious injury or death Open all local and remote electric power disconnect switches and
82. n sheet for total Connection unit full load amps wire size amps DPN002933 and max overcurrent protective device size Rev 0 5 1 Standard Electrical Connections Source DPN002933 Rev 0 Oy Or oo DO N 10 11 12 Electric conduit knockouts on top and bottom of electric box knockout size 1 75in 44 5mm Three phase connection Electric service connection terminals Factory installed disconnect switch Fused disconnect switch provided on units Three phase electric service field supplied Earth ground connection Connection terminal for field supplied earth grounding wire Earth ground bar optional Connection terminals with factory ground from each high voltage component for field supplied earth grounding wire Control and monitoring section of electric box Remote unit shutdown Replace existing jumper between Terminals 37 38 with normally closed switch having a minimum 75VA 24VAC rating Use field supplied Class 1 wiring Two additional contact pairs available as an option labeled as 37B amp 38B 37C amp 38C Replace existing jumper for appropriate pair as done for Terminals 37 amp 38 Remote Alarm Device RAD Connections Field supplied 24V Class 1 wiring for special alarm Connection made by adding normally open contacts Special alarm connections may be factory wired or field wired See schematic RADS1 4 for factory wired special alarms For field wired special alarms use 24V Class 1 wiring to con
83. name and address Site contact name and phone number Installation date Indoor unit model number and serial number Outdoor unit condenser or drycooler model number and serial number Condition of unit when received Is there a freight damage claim in process If so have all relevant parties been notified Have manuals been kept with unit Is the Liebert Precision Cooling unit connected to site monitoring or switchover controls Provide model and serial of connected controls for switchover controls Startup Checks With Panels Removed and Main Disconnect Off __ 1 Check all internal piping clamps and tighten or secure if needed 2 Check field piping for proper support and proper connection 3 Check unit electrical connections including and Mate N Loc connections to the control boards and tighten or secure if needed 4 Remove all debris tools and documents from unit area Inspect and Record Voltage EC Plug Fan Assemblies Tight and Secured Filter Size Quantity Piping Size Air Cooled Only Discharge Liquid _ Piping trapped according to installation manual air cooled Total Equivalent Length for Discharge and Liquid Piping Compressor Model Compressor Serial Startup 1 Turn On the Main Disconnect 2 Check voltage at disconnect and record L1 L2 L2 L3 L1 L3 3 Check control voltage transformers for proper output Secondary voltage s should not exceed 27VAC under load
84. nce 10 6 2 Condensate Pump Disconnect power to unit using disconnect switch A WARNING Risk of electric shock Can cause injury or death Open all local and remote electric power disconnect switches and verify that power is Off with a voltmeter before working within the condensate pump electrical connection enclosure The Liebert iCOM 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 of the Liebert iCOM Check and clear obstructions in gravity lines leading to condensate pump Remove sump and clean with a stiff nylon brush and flush with water Inspect and clear clogs in discharge check valve and float mechanism Reassemble and check for leaks Liebert PDX and Liebert PCW 76 Maintenance 10 7 Air Cooled Condenser and Drycoolers Clear coil surface of all debris that will inhibit airflow Check for bent or damaged coil fins and correct Do not permit snow to accumulate around or under outdoor unit Periodically consider commercial cleaning of coil surface Inspect fans motors and controls for proper operation Check all piping and capillaries for proper support Inspect for leaks 10 8 Reheat Electric Reheat Inspect and clean reheat elements Inspect and tighten support hardware 10 9 Thermostatic Expansion Valve 10 9 1 10 9 2 The Thermostatic Expansion Valve TEV performs
85. ndard thermal expansion valve TXV The EEV controls superheat through the Liebert iCOM controls by actively measuring suction pressure via a transducer attached to the suction line rotalock and suction temperature via a thermistor strapped to the suction line The EEV actively adjusts the orifice size and resulting mass flow of refrigerant to maintain the superheat setpoint set in Liebert iCOM NOTE Q Intermittent loss of subcooling may result in EEV superheat instability If superheat instability is observed check for proper refrigerant level in receiver see 8 2 1 Piping Guidelines Air Cooled Units for the proper charge level If proper charge is observed in receiver and superheat remains unstable then increase superheat setting in the Liebert iCOM to 15 F 8 49 C 10 11 Compressor 10 11 1 Compressor Oil NOTICE Risk of improper compressor lubrication Can cause compressor and refrigerant system damage Failure to use oil types viscosities and quantities recommended by the compressor manufacturer may reduce compressor life and void the compressor warranty See oil types specified in Table 20 Do NOT mix polyolester POE and mineral based oils Do NOT mix oils of different viscosities Consult Emerson or the compressor manufacturer if you have questions Table 20 Compressor oil types Refrigerant Type Compressor Type R 407cC Copeland Scroll E are and Digital Scroll POE Oil ISO 32 Viscosity
86. nect normally open contacts between Terminals 24 amp 50 24 amp 51 24 amp 55 or 24 amp 56 Smoke detector alarm connections Field supplied 24V Class 1 wiring to remote alarm circuits Factory wired contacts from optional smoke detector are 91 Common 92 NO and 93 NC Optional smoke detector trouble connections 80 amp 81 Common alarm connection Field supplied 24V Class 1 wiring to common alarm terminals 75 76 and optional 94 95 and 96 97 which are factory connected to common alarm relay R3 Heat rejection connection Field supplied 24V Class 1 wiring to interlock heat rejection from pigtails 70 71 which are factory connected to compressor side switch self contained units only or to GLYCOOL relay K11 GLYCOOL units only On Dual Cool units only pigtails 72 73 connect auxiliary cooling source to GLYCOOL relay K11 See indoor and outdoor electric schematic for more information Liebert PDX and Liebert PCW 24 Electrical Connections 13 14 15 16 17 18 19 Reheat and Humidifier Lockout Optional emergency power lockout of reheat and or humidifier Connections provided for remote 24VAC source Class 1 wiring to connections 82 amp 83 Main Fan Auxiliary Switch Optional main fan auxiliary side switch Terminals located in field wiring compartment for remote indication that the evaporator fan motor unit is on Field to connect 24V maximum Class 1 wiring to connect
87. nflow water glycol GLYCOOL front discharge models NOTE Drawing not to scale Al Roil Fi Tolerance on TSAN GONEL OHAR All dimensions from all piping dimensions including panels rear corner of unit i k x includi is 1 2 13mm X Lo i ne U ing pane Sox S E WSG I Y Q ECS A ECR Electrical Top Connections W 33 ws 837mm Su Lv1 N E1 Sp h WR B L Front of Unit Front of Unit TOP VIEW 34 1 2 875 9mm G G SECTION C C o CE CD Y _ Without Right Side Discharge HUM ws ECR o E FRONT VIEW _ with Left Side Discharge MB 0977 O ie Notes CE Lep A 1 Pipes at various heights to allow tube cutter to be used Will With Right Side Discharge require stub tubes and elbows for connection at these locations 2 Humidifier must be routed through this opening to the connection at the left hand side of the unit Field pitch condensate drain line a minimum of 1 8 3 2mm per foot 305mm All units contain a factory installed condensate trap Do not trap external to the unit Drain line may contain boiling water Select appropriate drain system materials The drain line must comply with all local codes DPN002947 Supplied on dual cooling systems only f
88. nister 1 eee eee eee a 7 Dram valve assembly A A A ese eat tones BNE By ON OWE Beha natant le todoo 92 Canister plugs reise e id ens ike T a a Circuit board diger am A AA AE Saeed A A ane ap ecient iii 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 TABLES Shipping dimensions Liebert PDX and Liebert PCW domestic and export 11 Shipping weights approximate 0 0 ce eee eee e eens 11 Weights for downflow Liebert PDX and Liebert PCW lb kg oooooo o 12 Weights for downflow Liebert PDX and Liebert PCW lb Ke 13 Approximate weights upflow models lb kg ooo 14 Floor stand height Downflow 0 0 ce eee eee een nee ees 15 Upflow unit plenum dimensions 0 00 e eee n teens 17 Recommended refrigerant line sizes OD copper inches 000 0 ees 33 Indoor unit approximate refrigerant charge for R 410A 0 cee ooo 33 Condenser refrigerant charge 34 Additional oil required per refrigerant charge 0 0 00 teens 34 Interconnecting piping refrigerant charge 00 ccc eee een eens 34 Target subcooling for ambient outdoor temperature 0 0 00 ccc ee eee eee 36 Difference in subcooling measurements Indoor minus outdoor 0 eens 38 Liquid pressure and temperature char
89. nsate Electrical 31 1 4 796 23 3 4 606 1 1 2 HUM Humidifier Supply Line 32 815 30 1 8 766 1 4 ECS Econ O Coil Supply 2 7 8 73 7 5 8 195 1 1 8 ECR Econ O Coil Return 2 7 8 73 11 3 4 298 1 1 8 E1 Electrical Connection High Voltage Bottom 31 1 2 801 28 3 8 722 7 8 1 3 8 1 3 4 E2 Electrical Connection High Voltage Bottom 31 1 2 801 26 1 8 665 7 8 1 3 8 1 3 4 E3 Electrical Connection High Voltage Top 31 788 27 3 4 704 7 8 1 3 8 1 3 4 E4 Electrical Connection High Voltage Top 31 788 30 760 7 8 1 3 8 1 3 4 LV 1 Electrical Connection Low Voltage Bottom 2 3 4 70 30 1 4 768 1 1 8 LV2 Electrical Connection Low Voltage Bottom 3 7 8 98 29 1 8 740 1 1 2 LV3 Electrical Connection Low Voltage Top 31 5 8 802 24 7 8 631 1 Source DPN002938 Rev 2 Liebert PDX and Liebert PCW 48 Piping Schematics Figure 27 NOTE Drawing not to scale Tolerance on all piping dimensions is 1 2 13mm _ With Left Side Discharge Notes Primary connection locations Liebert PDX downflow air cooled front discharge models All dimensions from All dimensions from rear corner of unit including panels rear corner of unit including panels x Y b Y Electrical Top Connections 33 837mm L1 LV1 O El y TOP VIEW Front of Unit Front of Unit L 34 1
90. nt See Figures 26 through 34 for condensate connection locations Gravity Drain Units Without Factory Installed Condensate Pump 3 4 FPT drain connection is provided on units without optional factory installed condensate pump Pitch drain line toward drain a minimum of 1 8 83mm per 1 foot 805mm of length e Drain is trapped internally Do not trap external to equipment Drain line must be sized for 2 gpm 7 6 lm flow NOTICE Risk of double trapping the unit drain line Can cause drain water to back up and overflow the unit cabinet resulting in expensive building and equipment damage Do not install an external drain line trap A drain line trap has been factory installed inside the unit Liebert PDX and Liebert PCW 30 Piping Figure 20 Gravity drain Downflow Units discharge into raised floor Internal Drain External Drain Continuous Downward Slope CORRECT Internal Drain External Drain Do Not Externally Trap the Unit INCORRECT External Drain These are external traps also although unintentional Lines must be rigid enough not to bow over top of other objects INCORRECT Condensate Pump Upflow Units and Downflow Units with Front Discharge Internal External Drain Drain UNIT Continuous Downward Slope CORRECT Internal Drain External Drain Do Not Externally Trap the Unit INCORRECT Internal External These are
91. o not mix products from different manufacturers 79 Liebert PDX and Liebert PCW Maintenance 10 14 Motorized Ball Valve Discharge pressure is controlled by a motorized ball valve During unloaded operation the pressure changes during each digital cycle could result in excessive repositions with a pressure operated water regulating valve The control algorithm for the motorized ball valve uses an intelligent sampling rate and adjustable pressure thresholds to reduce valve repositions The valve assembly consists of the brass valve linkage and actuator Control The valve actuator operates on 24VAC power and is controlled by a 2 10VDC proportional control signal The valve full open to full close time is 60 seconds At 2VDC the valve is closed at 1OVDC the valve is fully open There is a 20 second delay to position the motorized ball valve before starting the compressor Control Method The control utilizes an upper and lower pressure threshold with a 35 psi 241 kPa deadband to reduce valve movement If the liquid pressure is between the upper and lower threshold the valve remains at the current position If the liquid pressure exceeds the upper threshold the valve opens and if the pressure falls below the lower threshold the valve closes There are multiple adjustment bands to ease discharge pressure back into control range Adjustment Both pressure thresholds can be shifted simultaneously over a 50psi 345kPa range
92. of Gravity Indicator E Strap to gt secure unit if it will be moved with rigging US IA BH ae Lift Unit Space the Slings Equally on Either Side of Center of Gravity Indicator Remove Skid A 318627P1 318627P1 318627P1 Pg 2 Rev 0 Pg 3 Rev 0 Pg 3 Rev 0 4 2 3 Moving the Unit With Piano Jacks 1 NDAN 8 9 Raise the unit with a forklift pallet jack or rigging according to the instructions in either 4 2 1 Removing the Unit from the Skid With a Forklift or 4 2 2 Removing the Unit from the Skid Using Rigging Position a piano jack on either side of the elevated unit Lower the unit to a height suitable for the piano jacks Place protective padding between the unit and the piano jacks and straps Secure the unit to the piano jacks with the straps Lower the forklift tines and move the forklift away Roll the unit to the installation site Emerson recommends having at least two properly trained and qualified personnel move the unit Lower the unit as far as the piano jacks will allow Undo all straps holding the unit to the piano jacks 10 Use a pry bar or similar device to lift one end of the unit enough to remove one piano jack 11 Repeat Step 10 to remove the remaining piano jack 12 Remove the padding used to protect the uni
93. of water glycol solution condition problems and the variations of required treatment programs make it extremely important to obtain the advice of a competent and experienced water treatment specialist and follow a regularly scheduled coolant fluid system maintenance program Perform periodic inspections of the facility and the unit coil and or heat exchanger and coolant fluid piping system for leaks and visible damage Refer to 6 3 Fluid Connections for Systems Using Water Glycol and Chilled Water 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 through a maintenance program should help to establish a pattern of depletion A visual inspection of the solution and filter residue is often helpful in judging whether corrosion is occurring The complexity of water glycol solution condition problems and the variations of required treatment programs make it extremely important to obtain the advice of a competent and experienced water treatment specialist and follow a regularly scheduled coolant fluid system maintenance program Improper use of water treatment chemicals can cause problems more serious than using none Proper inhibitor maintenance must be performed to prevent corrosion of the glycol system Consult glycol manufacturer for testing and maintenance of inhibitors D
94. ompressors 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 A CAUTION Risk of contact with 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 A CAUTION Risk of handling heavy and lengthy parts Can cause personal injury and equipment damage Cabinet panels can exceed 5ft 1 5m in length and weigh more than 35 lb 15 9kg Follow relevant OSHA lifting recommendations and consider using a two person lift for safe and comfortable removal and installation of cabinet panels Only properly trained and qualified personnel wearing appropriate safety headgear gloves and shoes should attempt to remove or install cabinet panels NOTE The Liebert indoor cooling unit has a factory installed high pressure safety switch i in the high side refrigerant circuit A pressure relief valve is provided with Liebert Lee Temp condensers NOTICE Risk of clogged or leaking drain lines Can cause equipment and building damage This unit requires a water drain conn
95. on service valve This will permit adjustment of the cylinder hand valve so that liquid can leave the cylinder while allowing vapor to enter the compressor NOTICE Risk of refrigerant overcharge Can cause equipment damage Do not use the sight glass as an indicator when charging Liebert MC condenser systems 5 Turn On the Liebert MC disconnect switch 6 Turn on the indoor unit disconnect switch Operate the unit for 30 minutes using the charging function of the indoor unit control for each circuit of the system The charging function is in the diagnostic section of the Liebert iCOM control see Liebert iCOM user manual SL 18835 The charging function operates the compressor at full capacity and energizes the liquid line solenoid valve The reheat and humidifier are disabled Manual operation of the indoor fan from the diagnostic menu of the Liebert COM is required A minimum 20psig 138kPa must be established and maintained for the compressor to operate The charging function can be reset as many times as required to complete unit charging 7 Attach pressure and temperature instruments to the liquid line of the indoor unit Measure the initial subcooling and continue to add charge until recommended subcooling for the current outdoor ambient temperature is reached See Table 13 The outdoor ambient can be read from the Liebert MC condenser control menu ID F02 NOTE Q To determine subcooling measurement a liquid line pressure reading a
96. one function It keeps the evaporator supplied with enough refrigerant to satisfy load conditions It does not effect compressor operation Proper valve operation can be determined by measuring superheat The correct superheat setting is between 10 and 20 F 12 and 6 C If too little refrigerant is being fed to the evaporator the superheat will be high if too much refrigerant is being supplied the superheat will be low Determine Suction Superheat To determine superheat OU ee ee Measure the temperature of the suction line at the point the TEV bulb is clamped Obtain the gauge pressure at the compressor suction valve Add the estimated pressure drop between the bulb s location and the suction valve Convert the sum of the two pressures to the equivalent temperature Subtract this temperature from the actual suction line temperature The difference is superheat Adjust Superheat Setting with the TEV To adjust the superheat setting 1 Remove the valve cap at the bottom of the valve 2 Turn the adjusting stem counterclockwise to lower the superheat 3 Turn the adjusting stem clockwise to increase the superheat NOTE Make no more than one turn of the stem at a time As long as thirty minutes may be required for the new balance to take place 77 Liebert PDX and Liebert PCW Maintenance 10 10 Electronic Expansion Valve An optional Electronic Expansion Valve EEV is available in place of the sta
97. onnections Controls 1 Check Verify Control Operation Sequence Check humidifier high water alarm operation Check operation of the air safety switch 2 3 4 Check setting operation of the filter clog switch 5 Check test changeover device s 6 Check test water detection device s 83 Liebert PDX and Liebert PCW HVAC Maintenance Checklist Air Cooled Condenser Drycooler 1 Coil surfaces and fans free of debris clean wash and straighten fins as needed ___ 2 Fan motors securely mounted ___ 3 Check all piping and capillaries for vibration isolation support and secure as necessary __ 4 Check fuses 5 Check contactors for pitting __ 6 Check wire connections ___ 7 Fan speed control operation __ 8 Check operational sequence thermostat setpoints __ 9 Check refrigerant glycol lines for signs of leaks repair leaks as found 10 Check refrigerant level in each Liebert Lee Temp receiver 11 Glycol level 12 Glycol solution ___ 13 Motor amp draw 1 L1 L2 L3 L1 and L2 on Fan Speed Control Motor 2 L1 L2 L3 3 L1 L2 L3 4 L1 L2 L3 5 L1 L2 L3 6 L1 L2 L3 7 L1 L2 L3 8 L1 L2 L3 Glycol Pump 1 Check pump rotation ___ 2 Check for glycol leaks 3 Pump pressures 1 Suction Discharge 2 Suction Discharge 4 Amp Draw 1 L1 L2 L3 2 L1 L2 L3 5 Pump changeover if multiple pumps Liebert PDX
98. our pipe system Rev 1 Point Description X in mm Y in mm Z in mm Connection Size Opening in WS Water Glycol Supply 2 7 8 74 16 1 4 413 3 76 1 18 o WR Water Glycol GLYCOOL Return 2 7 8 73 27 3 8 694 3 76 1 1 8 WSG Glycool Supply 2 7 8 73 7 5 8 195 3 76 1 1 8 CD Condensate Drain 21 1 8 537 3 76 3 4 CE Condensate Electrical 22 3 4 578 2 3 4 70 1 3 8 HUM Humidifier Supply Line 20 508 2 1 2 64 1 4 ECS Econ O Coil Supply 2 7 8 73 7 5 8 195 3 76 1 1 8 ECR Econ O Coil Return 2 7 8 73 11 3 4 298 3 76 1 1 8 E1 Electrical Conn High Voltage Top 31 787 27 3 4 705 7 8 1 3 8 1 3 4 E2 Electrical Conn High Voltage Top 31 787 30 762 7 8 1 3 8 1 3 4 LV1 Electrical Conn Low Voltage Top 31 5 8 805 24 7 8 632 1 1 8 Source DPN002947 Rev 1 51 Liebert PDX and Liebert PCW Piping Schematics Figure 30 Primary connection locations Liebert PCW chilled water downflow models NOTE Drawing not to scale Tolerance on all piping dimensions is 1 2 13mm All dimensions from All dimensions from rear corner of unit including panels x rea
99. ower and Pump y Ka I by y Others LT Drycooler i Glycol Aquastat Sensing Bulbs Hose E Sn Valve Return Supply LIEBERT PDX UNIT and associated piping Liquid Evaporator Coil Expansion Tank Port Bib K Valve Optional 3 Way Motorized Ball Valve Optional Dual Pump System Shown Check Valves Y on Dual Pump Pressure Systems Sny Pressure Port Flow Switch Supplied with Dual ump Systems Flow regulating Valve L i Air Vents typical gt Shutoff Valve a Hose F pio i Y I L Shutoff Valve f Hose y Bib 2 Way Motorized x External Valve Compressor Equalizer Discharge Heat Exchanger Sight Filter Drier Expansion Glass Valve Pressure Transducer Factory Piping Field Piping Optional Factory Piping v Service Schrader Access Connection No Valve Core y Service Schrader Access Connection with Valve Core specifically noted Ball Valve DPN002931 Components are not supplied by Rev 1 Emerson but are requird for proper circuit operation and maintenance Field installed at highest point in system on return line to pumps ocate at tops of all risers and any intermediate system high points NOTE Schematic representation shown This schematic does not imply or define elevations and component location unless Liebert PDX and Liebert PCW
100. pressor amps L1 L2 L3 Fuse Check compressor operating pressure and record Check digital compressors fully loaded position Suction pressure Discharge pressure Sight glass clear Sight glass dry Check superheat values should be approximately 10 25 F 12 to 3 8 C Circuit Check low pressure settings Low pressure cutout Low pressure cut in Winter control system air cooled only Liebert Lee Temp liquid level correct Record voltage to heater pads Volts If the head pressures recorded above equal 105 F 40 C condensing temperature no adjustment of the glycol water regulating valves is required If the system has balancing valves in it these valves also should be adjusted After the condensing temperature has been set up properly the system should be allowed to run for 10 to 15 minutes to obtain stable conditions Entering condenser water glycol temperature Leaving condenser water glycol temperature 61 Liebert PDX and Liebert PCW Initial Startup Checks and Commissioning Procedure for Warranty Inspection 9 4 Commissioning Procedure With Panels On 1 Disconnect all power to the environmental control unit and check 2 Remove all line voltage fuses except the main fan fuses and the control voltage fuses in the electric panel Use Liebert iCOM to activate loads 3 Turn On power to the unit and check line voltage on main unit disconnect switch Line voltage must be with
101. pressure refrigerant Can cause injury or death This unit contains fluids and or gases under high pressure Relieve pressure before working with piping A WARNING Risk of refrigerant system rupture or explosion from over pressurization Can cause equipment damage injury or death Use extreme caution when charging the refrigerant system Do not pressurize the system higher than the design pressure marked on the unit s nameplate NOTE Q The Liebert indoor cooling unit has a factory installed high pressure safety switch i in the high side refrigerant circuit A pressure relief valve is provided with Liebert Lee Temp condensers Consult local building codes to determine whether the Liebert MC condensers will require field provided pressure relief devices NOTICE Risk of oil contamination with water Can cause equipment damage Liebert PDX systems require the use of POE polyolester oil See 10 11 1 Compressor Oil for requirements POE oil absorbs water at a much faster rate when exposed to air than previously used oils Because water is the enemy of a reliable refrigeration system extreme care must be used when opening systems during installation or service If water is absorbed into the POE oil it will not be easily removed and will not be removed through the normal evacuation process If the oil is too wet it may require an oil change POE oils also have a property that makes them act as a solvent in a refrigeration system M
102. quired based on condenser elevation above the indoor evaporator NOTE The evaporator subcooling will be greater than the condenser subcooling when the Liebert MC is mounted higher than the indoor evaporator Subcooling adjustment is needed when the Liebert MC is more than 40 ft 12m above evaporator NOTE Subcooling should be viewed at the Liebert MC condenser for a minimum of 1 minute and the subcooling should be approximately 2 F before recording subcooling to be compared against subcooling from the field refrigerant gauges and thermometers Sample Calculations The Liebert MC is 40 ft 12 2m above the evaporator of an R 410A system The outdoor ambient from the Liebert MC condenser control menu ID F02 is 94 8 F 34 9C The liquid pressure is 421 psig 2903kPA and the liquid temperature is 113 F 45 1 C The subcooling from the Liebert MC control is 7 F 3 9 C Determine the subcooling and verify the calculated subcooling against the reading of the Liebert MC control menu ID F50 Evaporator Subcooling Calculation Refrigerant Type R 410A 1 Ambient Temperature 94 8 F 34 9 C 2 Condenser Elevation 40ft 12 2m 3 Condenser Elevation Temperature Correction 2 F 1 1 C 4 Liquid Line Pressure 421psig 2902kPa 5 mae es Converted to Saturated Liquid 120 3 F 49 0 C Measured Liquid Line Temperature 113 2 F 45 1 C MC Condenser Subcooling Reading Menu ID F50 7 F 3 9 C ND Subtract Line 6 Mea
103. r corner of unit j including panels P Y Electrical Top Sa Connections 836 5mm LV3 O E4 i i HUM 7 Front of Unit LV1 TOP VIEW patie yas 34 1 2 m SECTION A A l H S a i Supply Air 4 O a Discharge Opening 30 1 2 775 1mm 1 EN a B FRONT VIEW SECTION B B Field pitch condensate drain line a minimum of 1 8 3 2mm per foot 305mm All units contain a factory installed condensate trap Do not trap external to the unit Drain line may contain boiling DPN002940 water Select appropriate drain system materials The drain line must comply with all local codes Rev 1 Point Description X in mm Y Connection Size Opening HWR Hot Water Reheat Return Optional 2 7 8 73 7 5 8 195 5 8 HWS Hot Water Reheat Supply Optional 2 7 8 73 11 3 4 298 5 8 WS Water Supply 2 7 8 73 7 5 8 195 1 1 8 WR Water Return 2 7 8 73 11 3 4 298 1 1 8 CD Condensate Drain 32 815 12 1 8 309 3 4 CE Condensate Electrical 31 1 4 796 23 3 4 606 1 1 2 HUM Humidifier Supply Line 32 815 30 1 8 766 1 4 El Electrical Connection High Voltage Bottom 31 1 2 801 28 3 8 722 7 8 1 3 8 1 3 4 E2 Electrical Connection High Voltage Bottom 31 1 2 801 26 1 8 665 7 8 1 3 8 1 3 4 E3 Electrical Connection High Voltage Top 31 788 27 3 4 704 7 8 1 3 8 1 3 4 E4 Electrical Connection High Voltage Top 31 788 30 760 7 8 1 3 8 1 3 4 LV1 Electrical Connection Low Voltage Bottom 2 3 4 70 30 1 4 768 1 1 8 LV2 Elect
104. r replacement Read all installation operating and safety instructions Verify that all the parts are included and Verify that the new caniste s voltage matches the voltage of the canister that was removed The Liebert iCOM does not isolate power from the humidifier even in the Unit Off mode This kit should be installed only by properly trained and qualified personnel WARNING Risk of improper wiring piping moving lifting and handling Can cause equipment damage injury or death Only properly trained and qualified service personnel should work on this equipment Read all installation operating and safety instructions before proceeding Read and follow all warnings in this manual WARNING Risk of smoke and fire Can cause activation of fire suppression systems building evacuation dispatching of fire rescue equipment and personnel and catastrophic canister failure resulting in water leaks equipment damage injury or death Using a humidifier canister that has reached the end of it s service life can be extremely hazardous If the canister cannot be replaced immediately at the end of life condition turn Off the power and water supply to the humidifier and remove the canister until a replacement canister can be installed Do not ignore humidifier problem alarms Resetting humidifier without addressing cause may result in fire or damage due to leaking water See Table 18 for alarm corrective actions CAUTION Risk of
105. refrigerant system rupture or explosion from overpressurization Can cause equipment damage injury or death Do not exceed the design pressure rating marked on the unit nameplate This unit contains fluids and gases under high pressure Relieve pressure before working with piping Local building or plumbing codes may require installing a fusible plug or other type of pressure relief device in the system 1 Liebert PDX and Liebert PCW Important Safety Instructions A WARNING Risk of contact with high speed rotating fan blades Can cause injury or death Open all local and remote electric power supply disconnect switches verify with a voltmeter that power is Off and verify that all fans have stopped rotating before working within the unit cabinet Do not operate unit with any or all cabinet panels removed Do not operate upflow units without installing a plenum ductwork or guard over the blower opening s on the top surface of the unit cabinet Ductwork must be connected to the blower s or a plenum must be installed on the blower deck for protection from rotating blower wheel s on upflow units A WARNING Risk of improper handling of top heavy unit Can cause unit to fall over resulting in equipment damage serious injury or death Read all instructions before attempting to move lift remove packaging from or preparing unit for installation A CAUTION Risk of contact with hot surfaces Can cause injury The c
106. rical Connection Low Voltage Bottom 3 7 8 98 29 1 8 740 1 1 2 LV3 Electrical Connection Low Voltage Top 31 5 8 802 24 7 8 631 1 Source DPN002940 Rev 1 Liebert PDX and Liebert PCW 52 Piping Schematics Figure 15 Without Left Side Discharge 31 All dimensions from rear corner of unit NOTE Drawing not to scale Tolerance on all piping dimensions is 1 2 13mm I Y Electrical Top 7 Connections 2 836 5mm LV1 Ig E2 _ With Left Side Discharge Notes 1 Pipes at various heights to allow tube cutter to be used Stub tubes and elbows required for connection at these locations 2 Humidifier must be routed through this opening to the connection at the left hand side of the unit TOP VIEW vial Front of Unit F ront of Unit 34 1 2 875 9mm SECTION C C FRONT VIEW Primary connection locations Liebert PCW downflow front discharge All dimensions from rear corner of unit including panels X P panels ZJO NI 1 1 N With Right Side Discharge g g Field pitch condensate drain line a minimum of 1 8 3 2mm per foot 305mm All units contain a factory installed condensate trap Do not trap external to the unit Drain line may contain boiling water Select appropriate drain system materials The drain line must comp
107. rolled condenser fan begins rotating The fan will run at full speed when sufficient head pressure is developed Table 15 Liquid pressure and temperature chart Pressure R 410A PSIG Bar F C 170 11 7 59 8 15 4 180 12 4 63 1 17 3 190 13 1 66 3 19 1 200 13 8 69 5 20 8 210 14 5 72 5 22 5 220 15 2 75 4 24 1 230 15 9 78 2 25 7 240 16 6 80 9 27 2 250 17 2 83 6 28 7 260 17 9 86 2 30 1 270 18 6 88 7 31 5 280 19 3 91 1 32 8 290 20 0 93 5 34 2 300 20 7 95 8 35 5 310 21 4 98 1 36 7 320 22 1 100 3 38 0 330 22 8 102 5 39 2 340 23 4 104 6 40 3 350 24 1 106 7 41 5 360 24 8 108 7 42 6 370 25 5 110 7 43 7 380 26 2 112 7 44 8 390 26 9 114 5 45 9 400 27 6 116 4 46 9 500 34 5 133 5 56 4 600 41 4 148 1 64 5 Values are for saturated liquid Source DPN002411 Rev 6 Liebert PDX and Liebert PCW 38 Piping Evaporator Subcooling Calculation Worksheet Circuit 1 Refrigerant Type Ambient Temperature Condenser Elevation Condenser Elevation Temperature Correction Liquid Pressure converted to Temperature Measured Liquid Line Temperature 2 3 4 Liquid Line Pressure 5 6 7 MC Condenser Subcooling Reading Menu ID F50 UT Subtract Line 6 Measured Line Temperature from Line 5 Liquid Pressure converted to Temperature to obtain Calculated Subcooling Circuit 1 Line 5 Line 6 Mi 8 C
108. ry connection locations Liebert PDX downflow air cooled models NOTE Drawing not to scale Tolerance on all piping dimensions is 1 2 13mm S including panels b Y LV3 O E3 O E4 SEE Front of Unit TOP VIEW E 2 S 1d d FRONT VIEW Field pitch Condensate Drain line a minimum of 1 8 3 2 mm per foot 305 mm All units contain a factory installed condensate trap Do not trap external to the unit Drain line may contain boiling water Select appropriate drain system materials The drain line must comply with all local codes Supplied on dual cooling systems only 4 pipe system _ All dimensions from rear corner of unit All dimensions from rear corner of unit including panels ECS i D P N Sp L1 o CE N E2 OF LV2 B U G1 Front of Unit LV ee 34 1 2 876mm SECTION A A o Supply Air o 28 1 Discharge A 725mm 8 Opening 3 30 1 2 E A 775mm A 1 PA E SECTION B B Front of Unit DPN002938 Rev 2 Connection Size Opening in Description X in mm Y in mm PX018 PX023 Liquid Line System 2 7 8 73 24 3 4 630 G1 Hot Gas Discharge 2 7 8 73 27 3 8 694 5 8 7 8 CD Condensate Drain 32 811 12 1 8 309 3 4 CE Conde
109. s and place a 150 PSIG 1034 kPa of dry nitrogen with a tracer of refrigerant Check system for leaks with a suitable leak detector 4 After completion of leak testing release the test pressure per local code and pull an initial deep vacuum of 500 microns on the system with a suitable pump 5 After four hours check the pressure readings and if they have not changed break vacuum with dry nitrogen Pull a second and third vacuum to 500 microns or less Recheck the pressure after two hours After completing this step proceed to the next section Calculating Charging Values for Liebert MC Condenser Systems Units without Liebert Lee Temp Systems The system must be fully piped and evacuated before it can be charged See Evacuation Air Cooled Models on page 35 Liebert MC condensers are charge sensitive and require accurate calculation of the system charge to avoid overcharging To avoid overcharge additional guidelines are recommended to ensure trouble free operation When charging system in an outdoor ambient below 50 F 10 C recheck the subcooling against Table 13 when the ambient is above 60 F 15 6 C The indoor space should be maintained at 70 to 80 F 21 to 26 7 C return air before final charge adjustments are made Charging unit at greater than 80 F 26 7 C return air may result in the unit being overcharged Charge by subcooling measurement at the indoor unit See Table 13 for target subcooling temperatures Pr
110. s removed in Step 9 22 Run the drain humidifier drain that was removed in Step 4 through the humidifier air blocking panel Connect to the T connection on the left side of the unit reconnect the humidifier s high limit wires to the bottom of the humidifier pan that were removed in Step 5 23 Reconnect the actuator if present that was removed in Step 6 24 Replace the front panel of the unit Turn main disconnect to On Turn unit On at display and verify the new fan starts Humidifier Infrared During normal humidifier operation deposits of mineral solids will collect in humidifier pan and on the float switch These must be cleaned periodically to ensure proper operation Frequency of cleaning must be locally established since it is dependant on humidifier usage and local water quality A spare pan is recommended to reduce maintenance time at unit The Liebert autoflush system can greatly increase the time between cleanings but does not eliminate the need for periodic checks and maintenance see Liebert iCOM user manual SL 18835 for autoflush setup To help reduce excessive scaling in locations with difficult water quality the use of Vapure is recommended contact your local Emerson representative Cleaning Humidifier Pan and Float Switch Before turning the unit Off With unit operating remove call for humidification at the Liebert iCOM control Let the blower operate 5 minutes to allow the humidifier and water to cool
111. scue equipment and personnel and water leaks resulting in expensive equipment or building damage injury or death Check steam generating humidifier electrode plugs to ensure that they are pressed firmly onto pins Loose connections will cause overheating of cylinder and plugs Liebert PDX and Liebert PCW 74 Maintenance Table 18 Steam generating humidifier status lamps causes corrective action Unit Status Lamp Yellow Green Symptom Corrective Actions This usually happens on initial startup after replacing the cylinder Maximum water level normal On On inside cvlinder Water is concentrated with minerals inside the cylinder y i Let unit run yellow light will disappear when the unit is at full output This may take a day or two Check for main power supply fault Turn power switch to DRAIN position If drain valve is activated sound of solenoid check connection to the board or board itself off Off No power to the board eee no sound sede check fuse replace with 3A if needed transformer voltage should be present between fuse holder and ground screw SEE Check drain valve operation drain time possible drain restrictions o Check if fill valve leaks not holding supply water ne flash Off of rated amps Water is Back ducti de S pressure may also cause very conductive water conditions sequence drained from the cylinder P drain valve on for 10 Check for short cycling l min Water
112. sured Line Temperature from Line 5 Liquid Pressure converted to Temperature to obtain Calculated Subcooling Line 5 120 3 F 49 0 C Line 6 113 2 F 45 1 C 8 Calculated Subcooling 7 1 F or 7 F 3 9 C or 4 C Elevation Correction Subtract Line 3 Condenser Elevation Temperature Correction from Line 8 Calculated Subcooling to obtain Corrected Subcooling Line 8 TF 3 9 C Line 3 2 F 2 2 C 9 Corrected Subcooling 5 F 1 7 C 37 Liebert PDX and Liebert PCW Piping Verification Against MC Condenser Subtract Line 7 MC Condenser Subcooling Reading from Line 9 Corrected Subcooling to obtain Difference Line 9 5 F 1 7 C Line 7 7 F 2 8 C 10 Difference 2 F 1 1 C If Line 10 Difference value is less than 3 F 1 7 C NO charge adjustment is needed If Line 10 Difference value is less than 3 F 1 7 C add additional charge If Line 10 Difference value is greater than 3 F 1 7 C the system is overcharged and some of the charge must be removed Table 14 Difference in subcooling measurements Indoor minus outdoor Liebert MC Elevation Above Elevation Subcooling Correction F C Evaporator ft m 80 24 60 18 40 12 20 6 Refrigerant R 410A 6 3 3 4 2 2 2 1 1 0 0 0 Assumes liquid line is sized for no more than 2 F 1 1 C pressure drop 9 As head pressure builds the variable fan speed cont
113. t IS UNITY DP Cards 8 Digital Scroll with TXV amp Sound Jacket Digit 20 Sensors 9 Digital Scroll with EEV amp Sound Jacket 0 None 2 Chilled Water 2 Way Standard Pressure S Smoke Sensor 3 Chilled Water 3 Way Standard Pressure H High Temperature Sensor 1 Chilled Water 2 Way High Pressure F Smoke and High Temperature Sensors T Chilled Water 3 Way High Pressure C Compressor Overload Sensor Digit 11 Humidification A Smoke and Compressor Overload Sensors 0 No humidifier D High Temperature Compressor Overload Sensors H Infrared Humidifier K Smoke High Temperature Compressor Sensors S Steam Gen Canister Humidifier Digit 21 Packaging Digit 12 Display P Domestic E Large Display w Supply Air Sensor C Wood Crate Export Digit 13 Reheat Digit 22 Configuration code 0 No reheat A No SFA s An Alpha except S 2 Electric reheat 2 Stage S SFA 4 Hot Water Reheat CW only Digit 23 25 Factory Configuration Number Note The 14 digit model number consists of the first 10 digits and last 1 High pressure MBV also results in high pressure FC valve four digits of the configuration number 2 Consult Factory for IBC OSPHD option availability 3 Consult Factory for EEV option availability Liebert PDX and Liebert PCW 8 Pre Installation Guidelines 2 0 PRE INSTALLATION GUIDELINES 2 1 Room Preparation Verify that the floor is level solid and sufficient to support the un
114. t 2 0 0 ccc eee teen eens 38 Filters number and Siz ieissa a ee GEN ove sew eae EAs TRT GND ew NER whe ve 64 Humidifier canister part numbers 73 Steam generating humidifier status lamps causes corrective action 0 000 e eee 75 Steam generating humidifier troubleshooting guide 0 0 00 ccc eens 75 Compressor Ol typeS irie e ce eee eee ee ee ee eee bees eee eee eee een aa 78 Water glycol system conditions requiring optional settings for aquastats 81 Aquastat settings two fan through four fan drycoolers 0 00 ccc eens 81 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 PDX and Liebert PCW 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 operating and user instructions A A A WARNING Arc flash and electric shock hazard Can cause injury and death Open all local and remote electric power supply disconnect switches verify with a voltmeter that power is Off and wear appropriate personal protective equipment per NFPA 70E before working within the electric control enclosure
115. t from the piano jacks and strapping 21 Liebert PDX and Liebert PCW Equipment Inspection and Handling Figure 15 Moving the unit with piano jacks Steps 3 4 and 5 ES A pue TZ AD G AL LTT Ge LL Padding and protective FORKLIFT SHOWN braces under piano jack TRANSFER TO PIANO JACKS straps WITH RIGGING IS SIMILAR Second piano jack on opposite side of unit 318627P1 Pg 3 Rev 0 4 3 Placing the Unit on a Floor Stand Liebert Floor Stand Refer to the floor stand installation sheet 319112 shipped inside the floor stand package Lower the unit onto the floor stand NOTE The floor stand for a Liebert PDX and Liebert PCW is not symmetrical Its orientation to the Liebert PDX and Liebert PCW is critical for installation of the unit Liebert PDX and Liebert PCW 22 Electrical Connections 5 0 ELECTRICAL CONNECTIONS Three phase electrical service is required for all models Electrical service must conform to national and local electrical codes Refer to equipment nameplate regarding wire size and circuit protection requirements Refer to electrical schematic when making connections Refer to Figure 16 for electrical service entrances into unit A manual electrical disconnect switch should be installed in accordance with local codes and distribution system Consult local codes for external disconnect requirements 4 A
116. t the factory installed Schrader tap needs to be measured along with obtaining a temperature reading on the liquid line Convert the liquid line pressure reading into a temperature by utilizing a Pressure Temperature Guide or Table 15 The difference between this converted temperature and the actual temperature will determine the system s subcooling Table 13 Target subcooling for ambient outdoor temperature Ambient Temp Subcooling F C F C 0 17 8 22 12 0 10 12 2 22 12 0 20 6 7 22 12 0 30 1 1 22 12 0 40 4 4 22 12 0 50 10 0 21 11 7 60 15 6 19 10 8 70 21 1 17 9 3 80 26 7 13 7 2 90 32 2 9 5 0 95 35 0 7 3 9 100 37 8 5 2 9 105 40 6 3 1 8 110 43 3 1 0 7 125 51 7 0 DPN002411 Rev 3 Liebert PDX and Liebert PCW 36 Piping 8 Verify the subcooling calculated from measured values at the evaporator against the subcooling reading of the Liebert MC control menu ID F50 If the subcooling calculated with gauges differs from the Liebert MC subcooling by more than 38 F 1 7 C then adjust the charge amount to achieve the target subcooling per Table 13 based the Liebert MC control subcooling Failure to check measured subcooling with refrigerant gauges vs Liebert MC subcooling may result in an overcharged system See Note below and Table 14 for corrections to Liebert MC subcooling that may be re
117. tatic Expansion Valve ee eee ete eee ees TT 10 9 1 Determine Suction Superheat aanus annee erranera TT 10 9 2 Adjust Superheat Setting with the TEV 77 Electronic Expansion Valve 78 LOTBS RO 0 ti A A A AA A Sea ed 78 10 141 Compressor Dll A A fakes ds a A cand a a bisa 78 10 11 2 Scroll and Digital Scroll Compressors 0 0 eee teen nes 78 10 11 83 Compressor Replacement 78 10 11 4 Compressor Motor Burnout 00 0 ene teen n eens 78 10 11 5 Digital Compressor Unloading Solenoid s 0 0 0 ooo 79 10 11 6 Compressor Replacement Procedure 0 cee eee ens 79 Facility Fluid and Piping Maintenance 79 Glycol Solution Maintenance eee nent n ene 79 Motorized Ball Valve tiros dente sows he dd el nee Gee a a dg wea Lie aie 80 DECO EE Set Ss a A ee a E A E eE wa 81 HVAC MAINTENANCE CHECKLIST 0 000 cece eee eee eee eee ees 82 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36 Figure 37 Figure 38 Figure 39 Figure 40 Figure 41 Figure 42 Figure 43 Figure 44 Figure 45 FIGURES Component locations Downflow Liebert DDS Component locations Downflow L
118. the 35 psi 241 kPa differential remains constant The ball valve setpoint offset parameter in the Service menu can be adjusted from 0 to 50 psi 345 kPa to raise or lower the control band similar to the pressure adjustment on a water regulating valve Changing the setpoint offset will adjust the pressure thresholds for both circuits Units are factory set at a 30 psi 207 kPa setpoint offset 30 psi 207 kPa above minimum This results in a 220 psiA 1517 kPa lower threshold and a 255 psiA 1758 kPa upper threshold pressure Startup The setpoint offset is adjusted to the minimum value during startup then transitions to the set value once the compressor reaches normal operating pressures Due to the control dead band it is possible for each circuit to stabilize at different pressures within the dead band Additionally changes in fluid temperature could cause pressure changes that do not result in valve movement within the dead band Fan cycling stats should be set to prevent continuous fluid temperature swings greater than 10 F 5 6 C see 10 15 Drycooler Settings Location The motorized ball valves are located in the condenser fluid return line Three way valves are piped in a mixing arrangement with the common port at the valve outlet Manual Control The valve can be manually set by disconnecting AC power depressing the manual override button on the valve actuator and adjusting the valve position with the handle Motorized bal
119. tic GLYCOOL models 0 0 0 ence eens Piping schematic chilled water units 0 0 ce enn e eee nee Optional piping schematic for Econ O Coil 0 0 0 eee eens Primary connection locations Liebert PDX downflow air cooled models Primary connection locations Liebert PDX downflow air cooled front discharge models Primary connection locations Liebert PDX downflow water glycol GLYCOOL cooled Models ia A be alte eek TT Primary connection locations Liebert PDX downflow water glycol GLYCOOL front discharge Models ceci bos Sok ee rhe aR Reb a wie Rae E T RN RR AT ete Riv bad N iw eared Primary connection locations Liebert PCW chilled water downflow models Primary connection locations Liebert PCW downflow front discharge Primary connection locations Liebert PDX air cooled upflow modela annuun aaaea Primary connection locations Liebert PDX upflow water glyco GLYCOOL models Primary connection locations Liebert PCW chilled water upflow models Remove the humidifier drain line Remove humidifier high limit wires 00 cece teen e ene e nena Humidifier electric box location 0 0 eee een e ene eens Bolt and panel removal Correct float switch orientation eee eee e eas Infrared humidifier lamps rusa eei eon R E RR T eee ence een en nee ees Steam generating humidifier canister 0 0 eee eee nee nes Removing the old ca
120. trap for clogs Check clean pan for mineral deposits Clean reflector Check water make up valve for leaks 2 3 4 5 Check humidifier lamps replace if burnt out 6 Check wire connections inside humidifier box 7 Humidifier amp draw L1 L2 L3 Liebert PDX and Liebert PCW 82 HVAC Maintenance Checklist Condensate Pump __ 1 Check for debris in sump __ 2 Check operation of float s free movement Refrigeration Piping __ 1 Check refrigerant lines clamps secure no rubbing no leaks __ 2 Check for moisture sight glass Water Cooled Condensers 1 Check water regulating valve operation Cap tubes not rubbing 2 3 Check for water glycol leaks 4 Entering water temperature 5 Leaving water Drain Piping 1 Check for free running drain system Clear out obstructions and material buildup on tubing walls ide 3 Check for leaks corrosion and damaged piping ___ 4 Check for tubing kinks or damage Compressor Section Check oil level Check for oil leaks Check compressor mounts springs bushings Ked Cap tubes not rubbing Check wire connections inside compressor box Compressor operation vibration noise DADA hn Suction Pressure Discharge Pressure Superheat Kad Low pressure switch cut out pa Low pressure cut in pa N High pressure cut out 13 Amp draw Electrical Panel __ 1 Check fuses __ 2 Check contactors for pitting __ 3 Check wire c
121. verify with a voltmeter that power is Off before working within the EC fan electric connection The motor connection enclosure may contain a stored electrical charge after power is disconnected Wait 10 minutes before opening the fan motor electrical connection enclosure and working within CAUTION Risk of contact with extremely hot surfaces Can cause injury The electronics housing can get hot and can cause severe burns Wear thermally insulated gloves and use proper skin protection when touching the electronics housing or allow time for the housing to cool before replacing parts CAUTION Risk of improper moving lifting and handling Can cause equipment damage or injury Only properly trained and qualified personnel should work on this equipment The fan module weighs approximately 100 lb 45 4kg Use OSHA recommended lifting techniques and take precautions to avoid back injury and dropping during removal NOTICE Risk of improper installation Can cause equipment damage Only a properly trained and qualified technician should install or open this motor Use 60 75 C Class 1 copper wire only 65 Liebert PDX and Liebert PCW Maintenance 10 3 Removing EC Fans Downflow Models Liebert PDX and Liebert PCW downflow models are equipped with EC fans The modules are removable for easier maintenance and replacement A WARNING Arc flash and electric shock hazard Can cause injury and death Open all local an
122. wer is connected properly The EC fans are not a reliable indicator of proper connection The blowers will rotate the same direction regardless of the three phase power input Confirm that all items on 8 0 Checklist for Completed Installation have been done Locate Liebert PDX and Liebert PCW Warranty Inspection Check Sheet in the unit s electric panel PSWI 8542 425 CO Complete Liebert PDX and Liebert PCW Warranty Inspection Check Sheet during startup PSWI 8542 425 CO Forward the completed Liebert PDX and Liebert PCW Warranty Inspection Check Sheet to your local Emerson sales office This information must be completed and forwarded to Emerson to validate warranty Contact your local Emerson sales representative or Liebert Air Product Support if you have any questions or problems during unit startup and commissioning Local Emerson Sales offices and Liebert Air Product Support contacts can be found at www liebert com or by calling 1 800 LIEBERT Liebert PDX and Liebert PCW warranty startup procedures includes the following steps These steps must be completed to validate warranty 59 Liebert PDX and Liebert PCW Initial Startup Checks and Commissioning Procedure for Warranty Inspection 9 1 9 2 9 2 1 9 3 Information for Warranty Inspection Remove Power From Unit Disconnect Complete the following items on the warranty inspection form Installer name and address Owner

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