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Liebert PX018 Installer's/User's Manual

Pdx and pcw series thermal management systems, 3 to 8 ton (11 to 29 kw) capacity, upflow and downflow, 60 hz
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Liebert® PDX™ and PCW™
Thermal Management Systems
3 to 8 Ton (11 to 29 kW) Capacity,
Upflow and Downflow, 60 Hz
Installer/User Guide

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  Summary of Contents for Liebert PX018

  • Page 1 Liebert® PDX™ and PCW™ Thermal Management Systems 3 to 8 Ton (11 to 29 kW) Capacity, Upflow and Downflow, 60 Hz Installer/User Guide...
  • Page 2 Technical Support Site If you encounter any installation or operational issues with your product, check the pertinent section of this manual to see if the issue can be resolved by following outlined procedures. For additional assistance, visit https://www.VertivCo.com/en-us/support/.
  • Page 3: Table Of Contents

    5.3 Water/Glycol and Chilled-water Loop Piping Guidelines 5.3.1 Leak Checking for Unit and Field-installed Piping 6 Electrical Connections 6.1 Wye- and Delta-connected Power Supply for PDX and PCW 6.2 Supply Temperature Sensor Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 4 9.8.1 Determining Suction Superheat 9.8.2 Adjusting Superheat Setting with the TXV 9.9 Electronic Expansion Valve (EEV) Maintenance 9.10 Compressor Maintenance 9.10.1 Compressor Oil 9.10.2 Scroll and Digital-scroll Compressor Maintenance 9.10.3 Replacement Compressors Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 5 9.14 Drycooler Aquastat Settings 10 Preventive Maintenance Checklist Appendices Appendix A: Technical Support and Contacts Appendix B: Liebert PDX Model-number Detail Appendix C: Liebert PCW Model-number Detail Appendix D: Submittal Drawings Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 6 Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 7: Important Safety Instructions

    The Liebert controller 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”...
  • Page 8 The pressure-relief valve must be rated 5% to 10% higher than the system-design pressure. An increase in ambient temperature can cause the pressure of the isolated refrigerant to rise and exceed the system-design pressure rating (marked on the unit nameplate). Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 9 Depending on the installation and operating conditions, a sound pressure level greater than 70 dB(A) may arise. Take appropriate technical safety measures. Operating personnel must wear appropriate, OSHA-approved PPE and observe all appropriate hearing-protection safety requirements. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 10 Risk of oil contamination with water. Can cause equipment damage. Liebert  PDX systems require the use of POE (polyolester) oil. 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.
  • Page 11 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 water/coolant fluid-supply circuit system operating continuously. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 12 Consult local building codes to determine whether the Liebert MC Condensers without receivers will require field-provided pressure-relief devices such as a fusible plug. A pressure- relief valve is provided with Liebert Lee-Temp™ receivers and an integral, fusible plug is provided on PDX-EEV unheated receivers.
  • Page 13: Nomenclature And Components

    2 NOMENCLATURE AND COMPONENTS This section describes the model-number configuration for Liebert PDX/PCW units and components. Figure 2.1 Liebert PDX/PCW Views Item Description Top-discharge, front-return unit Raised-floor discharge unit 3-way floor-level discharge unit Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 14: Liebert Pdx Model-Number Nomenclature

    Digit 22 = Factory Configuration code Digit 12 = Display Digit 23-25 = Factory Configuration Number Digit 13 = Reheat Digit 14 = Air filter 1. High-pressure MBV also results in high-pressure Econ-O-Coil valve. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 15: Liebert Pcw Model-Number Nomenclature

    Document Number Title DPN003004 PDX Component Location Diagram, Downflow Models DPN003005 PDX Component Location Diagram, Upflow Models DPN003020 PCW Component Location Diagram, Downflow Models DPN003021 PCW Component Location Diagram, Upflow Models Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 16 This page intentionally left blank. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 17: Pre-Installation Preparation And Guidelines

    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/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.
  • Page 18: Planning Dimensions

    Provide several feet of clearance for intake and discharge of the unit or for supply and return ducting. • Provide clearance for service access. See DPN002937 in the Submittal Drawings on page 106. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 19: Connections And System Setup

    3.4 Operating Conditions The Liebert PDX/PCW must be operated in a conditioned space within the operating envelope that ASHRAE recommends for data centers. Operating the PDX/PCW outside of this envelope can decrease equipment reliability. Refer to ASHRAE’s publication, “Thermal Guidelines for Data Processing Environments.”...
  • Page 20: Shipping Dimensions And Unit Weights

    600 (272) 710 (322) 814 (369) PW029 650 (294) 760 (345) 864 (392) NOTE: See capacity tables for unit liquid volume. Consult your factory sales rep for additional component weight information. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 21: Equipment Inspection And Handling

    • Piano jacks • Slings • Spreader bars 4.1 Packaging Material All material used to package this unit is recyclable. Please save for future use or dispose of the material appropriately. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 22: Handling The Unit While Packaged

    Figure 4.2 on the facing page. NOTE: The bag may remain in place to protect from dust and to protect the unit panels, or it may be removed for immediate installation. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 23: Removing The Unit From The Skid With A Forklift

    3. Referring to Figure 4.4 on the next page: • Insert the tines of the forklift completely under the base and beyond the opposite side of the unit making sure they are level, not angled upward. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 24 Moving the Unit with Piano Jacks on page 27. Figure 4.4 Remove the unit from the skid with a forklift Item Description Insert tines completely under base of unit. Lift unit and remove skid. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 25: Removing The Unit From The Skid Using Rigging

    NOTE: The unit is shown without packaging. You may refer to these steps to move the unit with rigging while the outer packaging is in place. Figure 4.5 Center-of-gravity indicator and example sling placement Item Description Center-of-gravity marker Equal distance between sling and marker. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 26 Figure 4.6 Remove the unit from the skid with rigging Item Description Use spreader bars and protect unit from slings. Lift unit so that weight is not on skid, and remove the skid. Horizontal strap location, at mid-height of unit. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 27: Moving The Unit With Piano Jacks

    Figure 4.8 below. Figure 4.8 Unit strapped to piano jacks Item Description Protective padding between piano jacks and straps. Second piano jack on opposite side. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 28: Placing The Unit On A Floor Stand

    Liebert Floor Stand—Refer to the floor stand installation sheet shipped inside the floor stand package. Lower the unit onto the floor stand. NOTE: The floor stand for a Liebert PDX/PCW is not symmetrical. Its orientation to the unit is critical for installation of the unit.
  • Page 29: Piping And Refrigerant Requirements

    Water/Glycol, Front Discharge Models DPN003520 GLYCOOL™ Raised Floor Models DPN003522 GLYCOOL™ Front Discharge Models DPN002940 Chilled Water, Raised Floor Models DPN002946 Chilled Water, Front Discharge Models Upflow Model Primary Connection Locations Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 30: Fluid Piping For Air-Cooled, Water/Glycol-Cooled And Chilled-Water Piping Applications

    A drain line from the secondary drain pan (if applicable). • A water-supply line to the optional humidifier (if applicable). • On air-cooled systems: refrigerant piping connections between the Liebert PDX and the condenser. See Refrigerant Piping and Charging on page 34.
  • Page 31 See the appropriate section, depending on the configuration of your unit: • Factory-installed Condensate Pump in Upflow Units on page 33 • Field-installed Condensate Pump for Downflow Units on page 33 Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 32 External trap. Do not trap externally. External traps, although unintentional. Lines must be rigid enough not to bow. Internal drain and trap location. Drain and trap not shown in this view. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 33: Water Supply-Line Requirements For The Optional Humidifier

    1/4-in. supply line, maximum water pressure is 150 psi (1034 kPa). • Size supply line for 1 gpm (3.8 l/m), with a minimum water pressure of 20 psi (138 kPa). • Do not supply de-ionized water to the humidifier. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 34: Refrigerant Piping And Charging

    Consult local building codes to determine whether the Liebert MC Condensers without receivers will require field-provided pressure-relief devices such as a fusible plug. A pressure- relief valve is provided with Liebert Lee-Temp™ receivers and an integral, fusible plug is provided on PDX-EEV unheated receivers.
  • Page 35: Refrigerant Piping Guidelines For Air-Cooled Systems

    • Consult factory if piping run exceeds 300 ft (91 m) equivalent length. • Keep piping clean and dry, especially on units with R-410A refrigerant. • Avoid piping runs through noise-sensitive areas. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 36: Refrigerant Line Sizes And Equivalent Lengths

    2. Must down-size vertical riser one trade size (1-1/8” to 7/8”, 7/8” to 3/4”, 3/4” to 5/8”, or 5/8” to 1/2”). Source: DPN000788, Rev. 5 5.2.3 Refrigerant Charge Requirements for Air-cooled Systems The following tables provide the refrigerant charge requirements for the Liebert PDX, connected piping, and condenser options. Table 5.5 Approximate R-410A refrigerant charge for air-cooled Liebert PDX...
  • Page 37 9 (270) 12 (360) 15 (440) 18 (530) 21 (620) 24 (720) 27 (800) PX029 6 (180) 9 (270) 12 (360) 15 (440) 18 (530) 21 (620) 24 (720) 27 (800) Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 38 Do not mix polyolester (POE) and mineral-based oils. • Do not mix oils of different viscosities. • Consult your local sales representative, Vertiv™ product support at 1-800-543-2778, or the compressor manufacturer if questions arise. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 39: Evacuation, Leak-Testing, And Charging Air-Cooled Systems With Txv And Without Receivers

    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™ controller. – or – If unit power is not available, connect a field-supplied 24-VAC/75-VA power source directly to the unit solenoid valve.
  • Page 40 NOTICE Risk of refrigerant overcharge. Can cause equipment damage. Do not use the sight glass as an indicator when charging Liebert MC condenser systems. The system must be fully piped and evacuated before it can be charged. See Evacuation and Leak- testing Air-cooled Systems without Receivers...
  • Page 41 6. Turn on the Liebert PDX/PCW disconnect switch, and operate the unit for 30 minutes using the charging function for each circuit of the system. • You must operate the indoor fan using the "Diagnostic" menu of the Liebert iCOM control.
  • Page 42 24.8 108.7 42.6 25.5 110.7 43.7 26.2 112.7 44.8 26.9 114.5 45.9 27.6 116.4 46.9 34.5 133.5 56.4 41.4 148.1 64.5 * Values are for saturated liquid Source: DPN002411, Rev. 8 Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 43: Evacuation, Leak-Testing, And Charging Air-Cooled Systems With Liebert Lee-Temp™ "Flooded-Condenser" Head-Pressure Control System

    If unit power is available, open the unit liquid-line solenoid valve or electronic-expansion valve (EEV) using the evacuation function in the diagnostic section of the Liebert iCOM® control. – or – If unit power is not available, connect a field-supplied 24-VAC/75-VA power source directly to the unit solenoid valve.
  • Page 44 3. Calculate the amount of charge for the system. See Refrigerant Charge Requirements for Air-cooled Systems on page 36. 4. Accurately weigh in as much of the system charge as possible before starting the unit. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 45: Evacuation, Leak-Testing And Charging Air-Cooled Systems With Eev And Unheated Receivers

    5. Turn on unit disconnect switch, and operate the unit for 30 minutes using the charging function in the "Diagnostic" menu of the Liebert iCOM controller. • A minimum 20 psig (138 kPa) must be established and maintained for the compressor to operate.
  • Page 46 NOTICE Risk of refrigerant overcharge. Can cause equipment damage. Do not use the sight glass as an indicator when charging Liebert MC condenser systems. To calculate the charge for the system: Check the unit's nameplate for refrigerant type to be used. Unit control configurations differ depending on refrigerant type.
  • Page 47: Superheat And Refrigerant Charge Optimization

    7. Turn on the Liebert PDX/PCW disconnect switch, and operate the unit for 30 minutes using the charging function for each circuit of the system. • You must operate the indoor fan using the "Diagnostic" menu of the LiebertiCOM control. •...
  • Page 48 Optimizing Refrigerant Charge on Water/Glycol Units Liebert PDX/PCW water/glycol systems are factory-charged with R-410A refrigerant and will operate without refrigerant-charge adjustment at a wide range of return-air temperatures and water/glycol entering temperatures. Adjusting the factory refrigerant charge while operating the unit at full-load room conditions and at typical water/glycol temperatures can maximize the cooling capacity and unit efficiency.
  • Page 49: Water/Glycol And Chilled-Water Loop Piping Guidelines

    The shut-off valves must be sized to close-off against the maximum coolant-fluid system pressure in case of a catastrophic fluid leak. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 50: Leak Checking For Unit And Field-Installed Piping

    5.3.1 Leak Checking for Unit and Field-installed Piping The fluid systems in the Liebert PDX/PCW are factory-checked for leaks and may be shipped with a nitrogen holding charge. At installation, check all fluid circuits for leaks. NOTE: We recommend isolating the unit with field-installed shutoff valves during leak checking of field-installed piping.
  • Page 51: Electrical Connections

    The Liebert controller 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”...
  • Page 52: Wye- And Delta-Connected Power Supply For Pdx And Pcw

    Electrical Field Connections, Downflow Models DPN002935 Electrical Field Connections, Upflow Models DPN003266 PDX CANbus & Interlock Connections between PDX Unit & Liebert MC Condenser DPN002169 Liebert MC Condenser Electrical Field Connections Premium Efficiency Control 6.1 Wye- and Delta-connected Power Supply for PDX and PCW Table 6.2 on the facing page shows the acceptable and un-acceptable power supplies by model number...
  • Page 53 Line-to-Line and are typically the country’s standard utilization voltage. Because there is no neutral line in a Delta-connected system, there is no Line-to-Neutral voltage! However, the line current in a Delta-connected system is 1.732 times the phase current supplied to the load(s). Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 54: Supply Temperature Sensor

    A 50 ft (15 m) extension cable is available if the sensor must be farther than 15 ft (4.5 m) from the Liebert iCOM controller. See the Liebert iCOM user manuals, SL-18841 and SL-18835, for more information on supply-air- temperature monitoring, control, or limit setup.
  • Page 55 To cable entry in cooling unit First probe, 12 in. (305 mm) from top Second probe, in approximate center of rack and in front of the equipment 2T sensor with label visible Hot aisle Cold aisle Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
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  • Page 57: Checklist For Completed Installation

    6. Ensure TXV equalizer lines and sensing bulb lines have sufficient clearance and do not rub against other refrigerant lines. 7. Ensure units with EEV have a receiver installed/piped on the Liebert MC and receiver is mounted at or above the relative height of the EEV in the PDX unit.
  • Page 58: Other Installation Checks

    8. Remove rubber band from float in optional infrared humidifier. 9. Seal openings around piping and electrical connections. 10. Installation materials and tools have been removed from equipment (literature, shipping materials, construction materials, tools, etc.). Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 59: Initial Start-Up Checks And Commissioning Procedure For Warranty Inspection

    The Liebert controller 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”...
  • Page 60 Confirm that all items on Checklist for Completed Installation on page 57 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 start-up.
  • Page 61: Maintenance

    The Liebert controller 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”...
  • Page 62: Filters

    The unit panels must be in place and closed to find this point. 5. Start the blower and turn the switch counterclockwise until the alarm is energized. 6. Turn the adjusting knob one turn clockwise or to the desired filter change point. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 63: Filter-Replacement For Upflow Units With Rear Return

    Bearings used on the units are maintenance-free. Consult the factory for more information. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 64: 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 controller 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.
  • Page 65 NOTE: Power wires must be removed from the motor for resistance test. L1 - L2 L2 - L3 L1 - L3 • Resistances should be similar for all 3 readings. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 66 NOTE: Use the GND in the KL3 connector. Do not connect the control ground to the PE in KL1! • Check +10 V output on KL3 connector (between +10 V and GND). Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 67: Replacing Ec Fans In Downflow Models

    The Liebert controller 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”...
  • Page 68 Then pull it up through the humidifier air-blocking panel it passes through. See Figure 9.2 on the facing page. Figure 9.1 Remove the humidifier drain line Item Description Humidifier drain T-connection Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 69 7. Locate the humidifier assembly and remove the cover to the electrical compartment. Disconnect the wires entering the humidifier electric box from the left side. See Figure 9.3 below. Figure 9.3 Humidifier electric box location Item Description Humidifier wiring harness Humidifier electric-compartment cover Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 70 22. Reconnect the actuator (if present) that was removed in step 5. 23. Replace the front panel of the unit. Turn main disconnect to On. Turn unit On at display and verify the new fan starts. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 71: Replacing Ec Fans In Upflow Models

    The Liebert controller 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”...
  • Page 72 Figure 9.6 below. Figure 9.6 Bolts to loosen and Brackets on which the plate will rest Item Description Bolt on mounting plate to loosen Bracket on which mounting plate will rest Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 73: Infrared Humidifier Maintenance

    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™...
  • Page 74: Changing Humidifier Lamps

    Cleaning Humidifier Pan and Float Switch on the previous page, steps through 10). 2. Disconnect power from unit. 3. At humidifier, remove screws and cover from high-voltage compartment. 4. Disconnect one end of purple jumper wires. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 75: Steam-Generating Humidifier Maintenance

    The Liebert controller 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”...
  • Page 76 Table 9.3  Humidifier canister part numbers Unit Model 200V, 208V, 230V 380/415V, 460V Humidifier Model PX011, 018, 023, 029 MES 2 317911p1 317911p2 PW017, 029 MES 2 Figure 9.10 Steam generating humidifier canister Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 77: Removing The Old Canister

    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. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 78: Installing The New Canister

    Check steam generating humidifier electrode plugs to ensure that they are pressed firmly onto pins. Loose connections will cause overheating of cylinder and plugs. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 79: Humidifier Troubleshooting

    In downflow applications, a downflow distributor should be used, but in some cases the fill cup extension will also be required. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 80 Check water level in the cylinder; should be about 3/4 full. 4 flashes End of cylinder life - change cylinder. Check for foaming if water level is lower or cylinder life shorter than expected. sequence Change cylinder, clean drain valve. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 81 Verify that drain valve operates freely when activated. Clean valve and replace if defective. rate Flush canister several times and replace if arcing persists. Excessive mineral Analyze mineral content of water. If mineral content is excessive contact Vertiv™ Technical content in water Support. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 82 380V: J3, J8, J15*, J17*, J19*, J10*, J23*, P11 (2-3)* • 460V: J2, J8, J15*, J17*, J19*, J10*, J23*, P11 (2-3)* • 575V: J1, J8, J15*, J17*, J19*, J10*, J23*, P11 (2-3)* Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 83: Condensate-Drain And Condensate-Pump System Maintenance

    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”...
  • Page 84: Determining Suction Superheat

    The EEV actively adjusts the orifice size and resulting mass flow of refrigerant to maintain the superheat setpoint (set in Liebert iCOM). The EEV is used in place of the standard thermal expansion valve (TXV).
  • Page 85: Compressor Maintenance

    Replacement compressors are available through your Vertiv™ sales 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.
  • Page 86: Unloading Solenoid(S) On A Digital-Scroll Compressor

    "Unit Off" mode. Some internal components require and receive power even during the "unit off" mode of the Liebert iCOM control. Open all local and remote electric power disconnect switches and verify with a voltmeter that power is Off before working on any component of the system.
  • Page 87: Facility Fluid And Piping Maintenance For Water And Glycol Systems

    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. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 88: Mbv 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 ball valves may be controlled through the Service menu using manual mode to override the normal control. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 89: Drycooler Aquastat Settings

    Factory Setting is used for all glycol applications, except single drycooler loops with motor ball valve controls. Stats must be field-adjusted to Optional Setting for GLYCOOL/Dual Cool applications and all single drycooler loops using motor ball valve flow controls. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
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  • Page 91: Preventive Maintenance Checklist

    4. Check/Test air sail switch (if equipped) 5. Motor amp draw • Compare to nameplate amps   #1   #2   #3 L1 Reheat Inspect elements 2. Check wire connections (inside reheat box) 3. Reheat amp draw Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 92 4. Check/Test CAN connection between indoor and outdoor units (if equipped) Refrigeration Piping Check refrigerant lines (clamps secure/no rubbing/no leaks) 2. Check for moisture (sight glass) 3. Check for restriction temperature drop across filter drier Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 93 8. Leaving water temperature ________° Chilled Water/Econ-O-Coil (if equipped) Verify proper water maintenance is being performed 2. Check coil and supply/return lines/connections for water/glycol leaks 3. Stroke free-cooling valve open and closed Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 94 9. Check surge-protection device status-indicator lights (if equipped) 10. Stat Settings ______       ______       ______       ______ 11. Refrigerant level (Lee-Temp™) 12. Glycol level 13. Glycol solution ----__________________% 14. Water/Glycol solution flowing continuously/clean and free of debris Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 95 2. Check pump and supply/return lines/connections for leaks 3. Pump pressures Suction Discharge #2 Suction Discharge #3 Suction Discharge 4. Amp Draw #2 L1 #3 L1 5. Verify pump changeover (if multiple pumps) Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 96 MAINTENANCE NOTES Name Signature Company Make photocopies for your records. Compare readings/information to previous maintenance worksheet. To locate your local Vertiv™ representative for Vertiv™-engineered parts, check https://www.vertivco.com/en-us/support/ or Call 1-800-543-2778. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 97: Appendices

    35028 Piove Di Sacco (PD) Italy +39 049 9719 111 Fax: +39 049 5841 257 Asia 7/F, Dah Sing Financial Centre 3108 Gloucester Road, Wanchai Hong Kong 852 2572220 Fax: 852 28029250 Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
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  • Page 99: Appendix B: Liebert Pdx Model-Number Detail

    10 digits and last 4 digits of the configuration number. Table B.1 PDX 25-digit Configuration Number Model Number Digits Model Number Digits 1 to 10 Model Details 11 to 14 Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 100 H = 9-inch color touchscreen Liebert iCOM™ Display Digit 13 = Reheat 0 = No reheat 2 = Electric reheat (2-Stage) 5 = SCR reheat (PX011 w/ digital scroll and System Type A or W only) Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 101 K = Smoke, High-temperature and Compressor Overload Sensors Digit 21 = Packaging P = Domestic C = Wood Crate Export Digit 22 = Factory Configuration code A = No SFA’s (Any Alpha letter except S) S = SFA Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 102 Table B.2 PDX Model-number Digit Definitions (continued) Digit Description Digit 23-25 = Factory Configuration Number 1. High-pressure MBV also results in high-pressure Econ-O-Coil valve. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 103: Appendix C: Liebert Pcw Model-Number Detail

    10 digits and last 4 digits of the configuration number. Table B.3 PCW 25-digit Configuration Number Model Number Digits 1 to 10 Model Details Model Number Digits 11 to 14 Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 104 Digit 12 = Display H = 9-inch color touchscreen Liebert iCOM™ Display Digit 13 = Reheat 0 = No reheat 2 = Electric reheat (2-Stage) 4 = Hot Water Reheat (CW only) Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 105 P = Domestic C = Wood Crate Export Digit 22 = Factory Configuration code A = No SFA’s (Any Alpha letter except S) S = SFA Digit 23-25 = Factory Configuration Number Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 106: Appendix D: Submittal Drawings

    Air Cooled, Raised Floor Models DPN002945 Air Cooled, Front Discharge Models DPN002942 Water/Glycol, Raised Floor Models DPN002947 Water/Glycol, Front Discharge Models DPN003520 GLYCOOL™ Raised Floor Models DPN003522 GLYCOOL™ Front Discharge Models Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 107 Electrical Field Connections, Downflow Models DPN002935 Electrical Field Connections, Upflow Models DPN003266 PDX CANbus & Interlock Connections between PDX Unit & Liebert MC Condenser DPN002169 Liebert MC Condenser Electrical Field Connections Premium Efficiency Control Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 108 This page intentionally left blank. Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide |...
  • Page 109 Three phase electrical service – Terminals are on top of disconnect switch for one and two fan units. Terminals are on bottom of disconnect switch for three and four fan units. Three phase service not by Liebert. See note 5.
  • Page 110 • 5B is the “END OF LINE” jumper. • 5C is the CANbus “DEVICE ADDRESS DIP SWITCH”. CANbus cable not by Liebert. See Note 2. (below) Remote unit shutdown – Replace existing jumper between terminals TB38-1 and TB38-2 with field supplied normally closed switch having a minimum 75VA 24VAC rating.
  • Page 111 Avoid running the cables by devices that may introduce noise, such as machines, fluorescent lights, and electronics. Avoid stretching cables. 10. The electrically commutated (EC) motors included in the Liebert MC Condenser are suitable for connection to power supplies with a solidly grounded neutral or high resistance to ground or corner ground.
  • Page 112 1. Schematic representation shown. Do not use for specific connection locations. 2. Components are not supplied by Liebert but are required for proper circuit operation and maintenance. One or more additional pressure relief valves are required downstream of any and all field installed isolation valves. Do not isolate any refrigerant circuits from over pressurization protection.
  • Page 113 OPTIONAL FACTORY PIPING Notes: 1. Schematic representation shown. This schematic does not imply or define elevations and component location, unless specifically noted. 2. Components are not supplied by Liebert but are required for proper circuit operation and maintenance. DPN002930 REV : 4...
  • Page 114 5. Locate at tops of all risers and any intermediate system high points. 6. Components are Liebert supplied and field installed, and are required for proper circuit operation and maintenance. 7. Component are not supplied by Liebert but are recommended for proper circuit operation and maintenance.
  • Page 115 5. Locate at tops of all risers and any intermediate system high points. 6. Components are Liebert supplied and field installed, and are required for proper circuit operation and maintenance. 7. Component are not supplied by Liebert but are recommended for proper circuit operation and maintenance.
  • Page 116 LIEBERT PDX & PCW ELECTRICAL FIELD CONNECTIONS UPFLOW & DOWNFLOW MODELS 1. High Voltage Entrance. Supplied on top and bottom of electric box. Knockout size Ø1.75in (44.5mm). 2. Low Voltage Entrance. Ø1.375 in. (34.9mm) hole located on bottom of Electric Box.
  • Page 117 20) CANbus Connector Terminal block with terminals 49-1 (CAN-H) and 49-3 (CAN-L) + SH (shield connection). The terminals are used to connect the CANbus communication cable (provided by others) from the indoor unit to the Liebert MC Condenser. 21) CANbus Cable – CANbus cable provided by others to connect to the outdoor condenser and optional PRE unit. No special considerations are required when the total external cable connection between the indoor unit and outdoor unit(s) is less than 450FT (137M).
  • Page 118 LIEBERT PDX & PCW ELECTRICAL FIELD CONNECTIONS UPFLOW & DOWNFLOW MODELS DOWNFLOW UNIT UPFLOW UNIT High Voltage Entrance Low Voltage Entrance Terminal Block For Customer Connection DPN002933 REV : 3 Page :3 /3 REV DATE : 12/16...
  • Page 119 LIEBERT PDX & PCW ELECTRICAL FIELD CONNECTIONS DOWNFLOW MODELS 1. Opening for field wiring. Suggested entry point for HV field wiring to unit. 2. Opening for field wiring. Suggested entry point for LV field wiring to unit. 3. Vacant IntelliSlot. May contain optional IntelliSlot cards.
  • Page 120 LIEBERT PDX & PCW ELECTRICAL FIELD CONNECTIONS UPFLOW MODELS 1 Opening for field wiring. Suggested entry point for HV field wiring to unit. 2 Opening for field wiring. Suggested entry point for LV field wiring to unit. 3 Vacant IntelliSlot. May contain optional IntelliSlot cards.
  • Page 121 LIEBERT PDX & PCW CABINET DIMENSIONAL DATA DOWNFLOW MODELS 32 9/16" 827mm Duct Flange 30 3/16" 33 1/2" 34 7/8" 767mm 852mm 886mm Duct Flange 1 3/8" Top View 34mm Optional Field installed 3/4" Duct Flange 19mm 24" 610mm 34"...
  • Page 122 LIEBERT PDX & PCW CABINET DIMENSIONAL DATA UPFLOW MODELS 34 1/2" 877mm 30 1/4" 33 1/4" 768mm 845mm Duct Flange Top View 1 1/4" 32mm 32 5/8" 827mm 3/4" Duct Flange 19mm 5 5/8" 143mm 34" 24" 864mm 610mm 77 1/2"...
  • Page 123 775mm FRONT VIEW SECTION B-B FRONT OF UNIT CONNECTION SIZE / OPENING POINT DESCRIPTION X in. (mm) Y in. (mm) PX011 PX018, PX023 PX029 LIQUID LINE SYSTEM 24-3/4 (629) 3/8" 1/2" 5/8" 2-7/8 (73) HOT GAS DISCHARGE 27-3/8 (695) 1/2"...
  • Page 124 RIGHT SIDE VIEW FRONT OF UNIT TOP VIEW CONNECTION SIZE/OPENING in. POINT DESCRIPTION X in. (mm) Y in. (mm) Z in. (mm) PX011 PX018, PX023 PX029 LIQUID LINE SYSTEM 5-1/8 (130) 25-5/8 (651) HOT GAS DISCHARGE 2-7/8 (73) CONDENSATE DRAIN 16-5/8 (422) 3-1/8 (89) 3/4"...
  • Page 125 LIEBERT PCW PRIMARY CONNECTION LOCATIONS DOWNFLOW CHILLED WATER MODELS 32 15/16" 837mm ELECTRICAL TOP CONNECTIONS FRONT OF UNIT 34 1/2" 876mm SECTION A-A FRONT OF UNIT TOP VIEW BOTTOM CONNECTIONS SUPPLY AIR DISCHARGE OPENING 28 9/16" 725mm 30 1/2" 775mm...
  • Page 126 LIEBERT PCW PRIMARY CONNECTION LOCATIONS UPFLOW CHILLED WATER MODELS 34 1/2" 876mm 32 5/8" 828mm TOP VIEW FRONT OF UNIT 32 9/16" 827mm Duct Flange 30 1/2" 775mm 30 1/4" 28 7/16" SUPPLY AIR 768mm 723mm DISCHARGE OPENING Duct Flange 5 9/16"...
  • Page 127 LIEBERT PDX PRIMARY CONNECTION LOCATIONS DOWNFLOW WATER/GLYCOL MODELS 33" ELECTRICAL TOP 837mm CONNECTIONS FRONT OF UNIT 34 1/2" TOP VIEW 876mm FRONT OF UNIT SECTION A-A BOTTOM CONNECTIONS SUPPLY AIR DISCHARGE OPENING 28 9/16" 725mm 30 1/2" 775mm FRONT VIEW...
  • Page 128 LIEBERT PDX PRIMARY CONNECTION LOCATIONS UPFLOW WATER/GLYCOL MODELS 34 1/2" 876mm 32 5/8" 828mm FRONT OF UNIT TOP VIEW 32 9/16" 827mm Duct Flange 30 1/2" 775mm SUPPLY AIR 30 1/4" 28 7/16" 768mm DISCHARGE OPENING 723mm Duct Flange 5 5/8"...
  • Page 129 663mm 26 9/16" 674mm 34 1/2" 876mm Front View DRY WEIGHT lb (kg) APPROXIMATE Left ISO View Liebert PDX Model No. PX011 PX018-023 PX029 Notes: Air Cooled 600 (272) 670 (304) 700 (317) 1. Shaded area indicates a recommended minimum...
  • Page 130 WITH LEFT SIDE DISCHARGE WITH RIGHT SIDE DISCHARGE CONNECTION SIZE / OPENING POINT DESCRIPTION X in. (mm) Y in. (mm) Z in. (mm) PX011 PX018, PX023 PX029 LIQUID LINE SYSTEM 24-3/4 (629) 3/8" 1/2" 5/8" 2-7/8 (73) HOT GAS DISCHARGE...
  • Page 131 LIEBERT PCW PRIMARY CONNECTION LOCATIONS DOWNFLOW FRONT DISCHARGE MODELS ELECTRICAL TOP 32 15/16" CONNECTIONS 837mm SECTION A-A FRONT OF UNIT TOP VIEW FRONT OF UNIT 34 1/2" 876mm WITHOUT LEFT SIDE DISCHARGE WITHOUT RIGHT SIDE DISCHARGE FRONT VIEW WITH LEFT SIDE DISCHARGE...
  • Page 132 LIEBERT PDX PRIMARY CONNECTION LOCATIONS DOWNFLOW FRONT DISCHARGE WATER/GLYCOL MODELS ELECTRICAL 33" 837mm CONNECTIONS FRONT OF UNIT 34 1/2" 876mm SECTION A-A FRONT OF UNIT TOP VIEW WITHOUT LEFT SIDE DISCHARGE WITHOUT RIGHT SIDE DISCHARGE FRONT VIEW WITH LEFT SIDE DISCHARGE...
  • Page 133 2. Using the table above and the boxes to the left of the floorstand views select one floorstand size. If you have any difficulty please contact 32 5/8" 30 11/16" 829mm 779mm your Liebert Sales Representative for assistance. 26 9/16" 28 1/2" 675mm 724mm Typ.
  • Page 134 LIEBERT PDX & PCW CABINET DIMENSIONAL DATA UPFLOW REAR RETURN MODELS 34 1/2" 877mm 33 1/4" 30 1/4" 845mm 768mm DUCT FLANGE 1 1/4" TOP VIEW 32mm 5 5/8" 32 9/16" 143mm 3/4" 827mm 19mm DUCT FLANGE 34" 24" 864mm 610mm 77 9/16"...
  • Page 135 LIEBERT PDX & PCW DIMENSIONAL DATA UPFLOW REAR RETURN FLOORSTAND 1" 25mm DUCTWORK FLANGE 31 5/8" 804mm FILTER 32 5/8" 829mm Shaded area indicates a required minimum 24" 34" clearance for filter removal, 864mm 610mm includes any nonremovable floor supports.
  • Page 136 LIEBERT PDX OPTIONAL PIPING SCHEMATICS ECON-O-COIL MODELS SUPPLY RETURN RETURN SUPPLY THERMISTOR THERMISTOR ACTUATOR ACTUATOR RETURN RETURN SUPPLY SUPPLY ECON-O-COIL ECON-O-COIL OPTIONAL ECON-O-COIL OPTIONAL ECON-O-COIL (3-WAY VALVE) (2-WAY VALVE) FACTORY PIPING FIELD PIPING Notes: 1, Place thermistor in location where flow is always present.
  • Page 137 LIEBERT PDX & PCW PLENUM DIMENSIONAL DATA UPFLOW DISCHARGE GRILLE FRONT VIEWS - CHECK ONE (1): REAR VIEWS - CHECK ONE (1): WITH GRILLE G1 (PDX) WITH GRILLE L1 (PDX) 34 1/2" 31 3/4" 876mm 807mm WITHOUT GRILLE WITHOUT GRILLE LEFT SIDE VIEWS - 18"...
  • Page 138 LIEBERT PDX COMPONENT LOCATION DIAGRAM DOWNFLOW MODELS REAR VIEW FRONT VIEW 1. Liebert iCOM Control Display 11. Econ-O-Coil Valve - GLYCOOL™/Dual Cooling (optional) 2. Electric Box 12. Smoke Detector (optional) 3. Filter 13. Serial Tag 4. Evaporator Coil 14. Hot Gas Line (Air-Cooled) or Return Connection (Water/Glycol/GLYCOOL™) 5 Compressor 15.
  • Page 139 LIEBERT PDX COMPONENT LOCATION DIAGRAM UPFLOW MODELS REAR VIEW FRONT VIEW 1 Liebert iCOM Control Display 10 Plate Condenser (optional) 2 Electric Box 11 Econ-O-Coil Valve - GLYCOOL/Dual Cooling (optional) 3 Filter (partial filter shown for clarity) 12 Condensate Pump (optional)
  • Page 140 LIEBERT PCW COMPONENT LOCATION DIAGRAM DOWNFLOW MODELS REAR VIEW 1. Liebert iCOM Control Display 2. Electric Box 3. Filter 4. Chilled Water Coil 5. Infrared Humidifier (optional) 6. Disconnect 7. EC Fan Electric Reheat (optional) 9. Chilled Water Valve 10. Smoke Detector (optional) 11.
  • Page 141 LIEBERT PCW COMPONENT LOCATION DIAGRAM UPFLOW MODELS REAR VIEW 1. Liebert iCOM Control Display 2. Electric Box Filter (partial filter shown for clarity) 4. Chilled Water Coil 5. Infrared Humidifier (optional) 6. Disconnect 7. EC Fan 8. Electric Reheat (optional) 9.
  • Page 142 LIEBERT PDX CANbus & INTERLOCK CONNECTIONS BETWEEN PDX UNIT & LIEBERT MC CONDENSER (PREMIUM) J6 TERMINATION JUMPER TB50 CAN H MUST BE SET TO PINS 1 AND 2. CONDENSER OUTPUT CAN L TB49 CANbus INPUT ADDRESSING TB50 CAN H OUTPUT...
  • Page 143 LIEBERT PDX CANbus & INTERLOCK CONNECTIONS BETWEEN PDX UNIT & LIEBERT MC CONDENSER (PREMIUM) COMPONENT NOTES: 1. COMPONENT APPEARANCE, ORIENTATION AND POSITIONINGMAY VARY TERMINAL NAMES AND CALLOUTS REMAIN CONSTANT. 2. ALL CIRCUITS TO THESE CONNECTION POINTS ARE CLASS 2. CAN & CABLE NOTES (A): 1.
  • Page 144 LIEBERT PDX & PCW PLENUM DIMENSIONAL DATA TOP DISCHARGE UPFLOW UNITS DISCHARGE OPENNING G1 (PDX) L1 (PDX) 34 1/2" 31 3/4" 876mm 807mm 2 13/16" 25 5/16" 19 5/16" 9 5/16" 72mm 643mm 491mm 236mm 1 7/16" 1 7/8" 48mm 37mm 18 1/16"...
  • Page 145 LIEBERT PDX PRIMARY CONNECTION LOCATIONS DOWNFLOW GLYCOOL™ MODELS 33" ELECTRICAL TOP 837mm CONNECTIONS FRONT OF UNIT 34 1/2" TOP VIEW 876mm FRONT OF UNIT SECTION A-A BOTTOM CONNECTIONS SUPPLY AIR DISCHARGE OPENING 28 9/16" 725mm 30 1/2" 775mm FRONT VIEW...
  • Page 146 LIEBERT PDX PRIMARY CONNECTION LOCATIONS UPFLOW GLYCOOL™ MODELS 34 1/2" 876mm 32 5/8" 828mm FRONT OF UNIT TOP VIEW 32 5/8" 827mm Duct Flange 30 1/2" 775mm FRONT VIEW SUPPLY AIR 30 1/4" 28 1/2" 768mm DISCHARGE OPENING 725mm Duct 5 5/8"...
  • Page 147 LIEBERT PDX PRIMARY CONNECTION LOCATIONS DOWNFLOW FRONT DISCHARGE GLYCOOL™ MODELS ELECTRICAL 33" 837mm CONNECTIONS FRONT OF UNIT 34 1/2" 876mm SECTION A-A FRONT OF UNIT TOP VIEW WITHOUT LEFT SIDE DISCHARGE WITHOUT RIGHT SIDE DISCHARGE FRONT VIEW WITH LEFT SIDE DISCHARGE...
  • Page 148 LIEBERT PDX & PCW DOWNFLOW PLENUM DIMENSIONAL DATA 30" 7/8" 763mm 22mm 32 3/8" 1 1/16" 822mm 27mm 13/16" 13/16" 20mm 20mm SIDE VIEW DIMENSIONS FRONT VIEW 34 1/2" 876mm 77 5/8" 1972mm Height H FRONT OF UNIT RIGHT SIDE in (mm) 18"...
  • Page 149 LIEBERT PDX & PCW PLENUM DIMENSIONAL DATA UPFLOW DISCHARGE W/ DUCT COLLAR 31 3/4" 807mm 34 1/2" 30" 7/8" 876mm 763mm 22mm 1 1/16" 27mm Typ. 32 3/8" 822mm 13/16" 20mm Typ. SIDE VIEW - UNIT WITH PLENUM FRONT VIEW - UNIT WITH PLENUM...
  • Page 150 Reheat Coil Optional Hot Water Reheat (2-way valve) FACTORY PIPING FIELD PIPING Note: 1. Components are not supplied by Liebert, but are required for proper circuit operation and maintenance. DPN003737 REV : 2 Page :1 /1 REV DATE : 12/16...
  • Page 151 1. Schematic representation shown. Do not use for specific connection locations. 2. Components are not supplied by Liebert but are required for proper circuit operation and maintenance. One or more additional pressure relief valves are required downstream of any and all field installed isolation valves. Do not isolate any refrigerant circuits from over pressurization protection.
  • Page 153 VertivCo.com | Vertiv Headquarters, 1050 Dearborn Drive, Columbus, OH, 43085, USA © 2017 Vertiv Co. All rights reserved. Vertiv and the Vertiv logo are trademarks or registered trademarks of Vertiv Co. All other names and logos referred to are trade names, trademarks or registered trademarks of their respective owners. While every precaution has been taken to ensure accuracy and completeness herein, Vertiv Co.

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