Vertiv Liebert CW Series Installer And User Manual
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Vertiv Liebert CW Series Installer And User Manual

Vertiv Liebert CW Series Installer And User Manual

Thermal management system
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Liebert®
CW™Thermal Management System
Installer/User Guide
38 to 400 kW(10 to 114 ton) Capacity, Upflow and Downflow, 50 Hz and 60 Hz

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Summary of Contents for Vertiv Liebert CW Series

  • Page 1 Liebert® CW™Thermal Management System Installer/User Guide 38 to 400 kW(10 to 114 ton) Capacity, Upflow and Downflow, 50 Hz and 60 Hz...
  • Page 2 The products covered by this instruction manual are manufactured and/or sold by Vertiv. This document is the property of Vertiv and contains confidential and proprietary information owned by Vertiv. Any copying, use or disclosure of it without the written permission of Vertiv is strictly prohibited.
  • Page 3 TABLE OF CONTENTS Important Safety Instructions 1 Nomenclature and Components 1.1 Liebert CWModel-number Nomenclature 1.2 Component Location 2 Pre-installation Preparation and Guidelines 2.1 Planning Dimensions 2.2 Location Considerations 2.3 Air-distribution Considerations for Downflow Units 2.4 Air-distribution Considerations for Upflow Units 2.5 Connections and System Setup 2.6 Operating Conditions 2.6.1 Cooling, Dehumidification and Humidification 2.6.2 Heating...
  • Page 4 10.4.2 Changing Humidifier Lamps 10.5 Condensate-drain and Condensate-pump System Maintenance 10.5.1 Condensate Drain 10.5.2 Condensate Pump 10.6 Facility Fluid and Piping Maintenance for Water and Glycol Systems 11 Preventive Maintenance Checklist Appendices Appendix A: Technical Support and Contacts Appendix B: Submittal Drawings Vertiv | Liebert® CW™Installer/User Guide...
  • Page 5 IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important safety instructions that should be followed during the installation and maintenance of the Liebert® CW. 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, notices and installation, operating and safety instructions on the unit and in this manual.
  • Page 6 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. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 7 WARNING! Risk of top-heavy unit falling over. Improper handling 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.
  • Page 8 In general, power-source voltages should be stabilized and regulated to within ±10%of the load nameplate nominal voltage. Also, ensure that no three-phase sources are single-phased at any time. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 9 It will, however, assume the corrosivity of the coolant fluid from which it is prepared and may become increasingly corrosive with use if not properly inhibited. Vertiv recommends installing a monitored fluid-detection system that is wired to activate the automatic- closure of field-installed coolant-fluid supply and return shut-off valves to reduce the amount of coolant-fluid leakage and consequential equipment and building damage.
  • Page 10 NOTICE Risk of improper storage. Can cause unit damage. Keep the unit upright, indoors and protected from dampness, freezing temperatures and contact damage. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 11 1 NOMENCLATURE AND COMPONENTS This section describes the model number for Liebert® CWunits and components. 1.1 Liebert CW Model-number Nomenclature Table 2.2 below describes each digit of the model number. Table 2.1 CW Model Number Example Model-number digits 1 to 10 Factory-configuration Number Configuration Code Table 2.2 CW Model-number Digit Definitions...
  • Page 12 Not available on 208-V units with 20-hp motor • Flow switch that activates the warning system • Ships loose • Humidification and Reheat • Not available on CW300 and CW400 • Steam/Hot-water reheat package • Not available on units with EC fans Vertiv | Liebert® CW™Installer/User Guide...
  • Page 13 1.2 Component Location The unit component locations are described in the submittal documents included in the Submittal Drawings on page 109. The following table lists the relevant documents by number and title. Table 2.3 Component-location Drawings Document Number Title DPN002869 Component Location, DownflowModels DPN002868 Component Location, UpflowModels 1 Nomenclature and Components...
  • Page 14 This page intentionally left blank Vertiv | Liebert® CW™Installer/User Guide...
  • Page 15 Install the units as close as possible to the largest heat load. • Allow at least the minimum recommended clearances for maintenance and service. See the appropriate submittal drawings for dimensions. • We recommend installing an under-floor water detection system. Contact your Vertiv representative for information. 2 Pre-installation Preparation and Guidelines...
  • Page 16 FloorstandDimensional Data, DownflowModels, CW051 andCW060 DPN003210 FloorstandDimensional Data, DownflowModels, CW076andCW084 DPN003191 FloorstandDimensional Data, DownflowModels, CW106andCW114 DPN003207 FloorstandDimensional Data, DownflowModels, CW146andCW181 DPN002433 FloorstandDimensional Data, DownflowModels, CW300 andCW400 Floor Standsfor UnitswithForward-curvedBlowers DPN001676 FloorstandDimensional Data, CW038to CW084 DPN001677 FloorstandDimensional Data, CW106andCW114 Vertiv | Liebert® CW™Installer/User Guide...
  • Page 17 Table 3.1 Dimension Planning Drawings (continued) Document Number Title Plenumsfor UnitswithECFans DPN004604 Plenum Dimensional Data, DownflowModels, CW038to CW084 DPN004605 Plenum Dimensional Data, DownflowModels, CW106andCW114 DPN003214 Plenum Dimensional Data, UpflowModels, CW038to CW084 DPN003213 Plenum Dimensional Data, UpflowModels, CW106andCW114 Plenumsfor UnitswithForward-curvedBlowers DPN003204 Plenum Dimensional Data, UpflowModels, CW038to CW084 DPN003205 Plenum Dimensional Data, UpflowModels, CW106andCW114...
  • Page 18 Figure 3.1 Downflow unit ducting and plenum ducting Item description Field-fabricatedduct work Fieldservice accessfor filter replacement Minimum height = 12 in. (305 mm) Minimum distance from unit = 2 in. (51 mm) Service-accessdoor for filter replacement providedinplenum. Direct-to-unit ducting Plenum ducting Vertiv | Liebert® CW™Installer/User Guide...
  • Page 19 2.4 Air-distribution Considerations for Upflow Units Various configurations are available: • Front return • Rear return • Bottom return (not available on CW106 and CW114 models) For in-room applications with supply and return grilles, several feet of clearance must be maintained at the intake and discharge of the unit.
  • Page 20 Submittal Drawings page 109. • If seismic requirements apply, consult your Vertiv 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.
  • Page 21 2.6.1 Cooling, Dehumidification and Humidification Return air to the unit 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. 2.6.2 Heating The Liebert®...
  • Page 22 This page intentionally left blank Vertiv | Liebert® CW™Installer/User Guide...
  • Page 23 3 EQUIPMENT INSPECTION AND HANDLING AFETY NFORMATION WARNING! Risk of top-heavy unit falling over. Improper handling 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.
  • Page 24 • Carefully inspect all items for visible or concealed damage. • Report damage immediately to the carrier and file a damage claim with a copy sent to Vertiv or to your sales representative. • For initial access use a 7/32-in. Allen wrench for panel removal.
  • Page 25 3.3 Unpacking the Unit Remove the exterior stretch wrap packaging from around the unit and any planks tightened with the stretch wrap, exposing the protective corner and side packaging planks, as shown in 3.3 above. 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.
  • Page 26 2. Place the slings and between the bottom rails of the unit and the skid as shown in Figure 4.4 on the facing page. NOTE: Unit is shown without packaging. These instructions may be followed with or without the outer packaging in place. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 27 Figure 4.4 Example sling placement on CW146 to CW400 units Item Description Distance betweenslingandcenter-of-gravity marker equal to item 2. Distance betweenslingandcenter-of-gravity marker equal to item 1. 3 Equipment Inspection and Handling...
  • Page 28 With the unit elevated, position piano jacks at each end of the unit. 2. Lower the unit to a height suitable for the piano jacks, place protective material between the unit and the piano jacks and straps. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 29 3. With the unit secured to the piano jacks, move the forklift away from the unit. 4. Using the piano jacks, at least two trained personnel can move the unit to the site for installation. • For location considerations, refer to Pre-installation Preparation and Guidelines on page 15.
  • Page 30 EC fans. Unless the floor stand is installed in the correct position, the fans will not lower into the floor stand. Figure 4.7 Welded tabs on floor stand Item Description Front of unit Vertiv | Liebert® CW™Installer/User Guide...
  • Page 31 4 PIPING REQUIREMENTS All fluid 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.
  • Page 32 The following pipe connections are required: • A drain line from the evaporator coil drain pan. • A water-supply line to the optional humidifier (if applicable). • Connections to the building chilled-water source. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 33 4.1.1 Field-installed, Gravity-fed Drain Line Requirements NOTICE Risk of water backing up in the drain line. Leaking and overflowing water can cause equipment and building damage. Do not install an external trap in the drain line. This line already has a factory-installed trap inside the cabinet. Installation of a second trap will prevent drain-water flow and will cause the water to overflow the drain pan.
  • Page 34 Figure 5.1 Correct and Incorrect gravity drains for downflow and upflow units Table 5.3 Gravity-fed Drain Line Figure Descriptions Item Description For downflowunits For upflowunits Correct draininstallation Incorrect draininstallation Internal drain External drain Vertiv | Liebert® CW™Installer/User Guide...
  • Page 35 Table 5.3 Gravity-fed Drain Line Figure Descriptions (con- tinued) Item Description Continuousdownwardslope External trap. Do not trapexternally. External traps, althoughunintentional. Linesmust be rigidenoughnot to bow. Internal drain 4.1.2 Condensate-pump Drain Line Requirements NOTICE Risk of water backing up in the drain line. Leaking and overflowing water can cause equipment and building damage.
  • Page 36 It will, however, assume the corrosivity of the coolant fluid from which it is prepared and may become increasingly corrosive with use if not properly inhibited. Vertiv recommends installing a monitored fluid-detection system that is wired to activate the automatic- closure of field-installed coolant-fluid supply and return shut-off valves to reduce the amount of coolant-fluid leakage and consequential equipment and building damage.
  • Page 37 NOTICE Risk of no-flow condition. Can cause equipment damage. Do not leave the water/coolant fluid-supply circuit 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 water/coolant fluid-supply circuit system operating continuously.
  • Page 38 This page intentionally left blank Vertiv | Liebert® CW™Installer/User Guide...
  • Page 39 5 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 the appropriate submittal drawing, listed in Table 6.1 on the next page, for electrical service entrances into unit.
  • Page 40 DPN004550 Electrical FieldConnections, Downflow, CW146andCW181 UpflowUnits DPN003200 High-voltage Connections, Upflow, CW038to CW084 DPN004552 Low-voltage andEthernet Connections, Upflow, CW038to CW084 DPN003202 High-voltage Connections, Upflow, CW106andCW114 DPN004551 Low-voltage andEthernet Connection, UpflowCW106andCW114 Unit-to-Unit Networking DPN004351 Liebert®iCOMUnit-to-unit Network Connections Vertiv | Liebert® CW™Installer/User Guide...
  • Page 41 6 EC FANS AND PLENUMS Depending on the air-distribution options of your unit, you may have EC fans and/or plenums to install. 6.1 Downflow Units with EC Fans CWdownflow models are equipped with EC fans that may operate in the fully-raised position or lowered into the floor stand for increased efficiency from reduced air resistance.
  • Page 42 7. Remove the 6 1/2-in. hex head screws, – and – On CW038 through CW114 models, remove the “Z” bracket(s) using a socket wrench. Retain the hardware for later steps. Figure 7.1 Lowering EC fans into floor stand, steps 1 through 7 Vertiv | Liebert® CW™Installer/User Guide...
  • Page 43 8. Using the jack, lower the fan module slowly until it rests on the frame of the unit. NOTICE Risk of equipment snagging cables and wiring. Can damage the unit wiring and components. Carefully monitor the position of the EC-fan wire harnesses and other parts while lowering the fan to be sure that they are not caught or pinched.
  • Page 44 Figure 7.2 Lowering EC fans into floor, steps 8 through 9 Vertiv | Liebert® CW™Installer/User Guide...
  • Page 45 6.2 Upflow-unit Plenums with EC Fans EC fans on upflow units are mounted external to the unit in a factory-provided plenum. The plenum distributes air to the conditioned space through adjustable, double-deflection grilles, or connects with field-supplied duct work. Read all instructions before installing plenums and EC fans. WARNING! Risk of electric shock and contact with high-speed moving parts.
  • Page 46 — CW026–041, Unit Length50" (1270 mm) Non-grilledplenum 306194G1 -74lb. (34kg) 306194G2 -91 lb. (41 kg) 306194G3 -104lb. (47 kg) Front discharge 306587G1 -130 lb. (59kg) — — Rear discharge 306193G1 -130 lb. (59kg) — — Vertiv | Liebert® CW™Installer/User Guide...
  • Page 47 Table 7.2 EC-fan Assembly Numbers, Weights and Voltage Assembly no. and weight Voltage 306943G1 -102 lbs. (46 kg) 480 V 306943G2 -102 lbs. (46 kg) 208V Figure 7.4 Plenum parts identification NOTE: Not all parts are used in all models: Units shorter than 122 in. do not include short front and rear panels or channel panels.
  • Page 48 1 or 2 TopFrame Angle Brace Panel MountingBracket (single panel) TopFrame Plenum Brace Not shown Washer 1/4 varies Not shown Bolt 1/4-20 x 1 varies Not shown Sheet Metal Screw#8-18x 1/2 varies Not shown Insulation/Gasket tape varies Vertiv | Liebert® CW™Installer/User Guide...
  • Page 49 Figure 7.5 EC-fan assembly Table 7.4 EC Fan Parts and Quantities Item Description Quantity Not shown Washer Not shown Bolt Not shown Spacer Compressor-plenum Parts Identification Table 7.5 Compressor Plenum Assembly Numbers, Weights and Size Assembly no. and weight Plenum size, in. (mm) 313202G10 -27 lb(11 kg) 17 x 24(432 x 610) 313202G11 -30 lb(14kg)
  • Page 50 Table 7.6 Compressor plenum parts and quantities Item Description Quantity Front/Rear panel 1 or 2 Angle-mountingchannel 2 or 3 Angle-mountingbracket Front panel withquarter-turnfasteners Side panel Not shown Sheet-metal screw varies Vertiv | Liebert® CW™Installer/User Guide...
  • Page 51 6.2.2 Assemble plenum rear and side panels NOTE: Grilles can be installed on different sides of the plenum depending on discharge configuration. Verify grill location and install according to facility-layout plans. NOTE: Electrical connections and some piping connections are made through the plenum. Plan accordingly.
  • Page 52 Figure 7.7 Apply Gasket/Insulation Tape Item Description Front solid, front-andrear-grilledpanel Rear solidpanel Side panel Gasketing/Insulationtape Vertiv | Liebert® CW™Installer/User Guide...
  • Page 53 2. If assembling a 50-in. to 99-in. plenum, skip to step 5. – or – If assembling a 122-in. plenum, continue with step 3. 3. Attach the long and short panel together using the channel panel and sheet-metal screws as shown in Figure 7.8 below.
  • Page 54 2. Make sure that the panels fit snugly along the collar flange on top of the unit, and temporarily install clamps, Figure 7.10 on the facing page, to hold the panels to the collar flange for final attachment. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 55 3. Use sheet-metal screws in the provided holes to attach the panels to the collar flange, Figure 7.10 below. Figure 7.10 Assembled panels on top of unit Item Description Clamp Sheet-metal screws 6 ECFans and Plenums...
  • Page 56 Position the lifting device so that it lines-up with the installation location of the EC-fan assembly. • Use the device to lift the EC-fan assembly just above the top of the unit. Figure 7.11 EC-fan assembly positioned for lifting Item Description Accessclearance area of 36 in. (914 mm)from top to bottom of unit Vertiv | Liebert® CW™Installer/User Guide...
  • Page 57 5. Using the handles on the EC-fan assembly, carefully lift the assembly over the hinge along the top of the unit, and slide the assembly onto the top of the unit until the mounting holes on the base of the assembly align with the threaded holes on top of the unit, Figure 7.12 below.
  • Page 58 3. Use provided wire ties to secure the wire harnesses to the fan cage to prevent harness movement when fans are running. Figure 7.14 EC-fan junction boxes Item Description Junctionbox betweenfans1 and2 on 2- and 3-fanunit Junctionbox for 1-or 3-fanunit Vertiv | Liebert® CW™Installer/User Guide...
  • Page 59 Figure 7.15 Junction box between fans 1 and 2 NOTE: For the high-volt terminal blocks, the wire-termination torque is 16-20 in-lbs. Item Description Fan(low-volt)wiring Motor (high-volt)wiring Green/Yellowgroundwire 6 ECFans and Plenums...
  • Page 60 Non-grilled plenum front panels require assembly and attachment before mounting the panels, see Non-grilled and rear- discharge front-panel assembly on the facing page. Grilled plenums do not require a frame assembly, see Front-discharge front-panel assembly on page 71. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 61 Non-grilled and rear-discharge front-panel assembly Attach the panel-mounting bracket(s), Figure 7.17 below: • For single- and double-panel plenum, attach the panel-mounting bracket using 1 bolt and 1 washer. • For double-panel plenum, attach the panel-mounting bracket using 2 bolts and 2 washers. Figure 7.17 Panel-mounting bracket attachment Item Description...
  • Page 62 2. Using the top-frame angle brace and 8 sheet-metal screws, connect the top frame to the top-frame extension, Figure 7.18 below. Figure 7.18 Top-frame assembly Item Description Topframesattachedwith angle brace. Bottom view. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 63 3. Using 3 sheet-metal screws, attach the top of the channel frame(s) to the top frame. The number of channel frames varies depending on the size of plenum, Figure 7.19 below. NOTE: The bottom of the channel frame has a longer flange. Figure 7.19 Channel frame top attachment Item Description...
  • Page 64 For non-grilled plenums, refer to Figure 7.21 on the facing page and use 2 sheet-metal screws on each end. Figure 7.20 Rear-discharge plenum top frame attachment to sides Item Description Sheet-metal screws Topframe Viewshownfrom opposite side. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 65 Figure 7.21 Non-grilled plenum top frame attachment to sides Item Description Front of plenum Side panel Sheet-metal screws Topframe 6 ECFans and Plenums...
  • Page 66 5. Attach the bottom of the channel frame(s) to the top of the unit using 1 washer and 1 bolt for each, Figure 7.22 below. Figure 7.22 Channel frame bottom attachment Item Description Bolt Washer Channel frame Bolt hole/Hexsert Front of unit Vertiv | Liebert® CW™Installer/User Guide...
  • Page 67 6. For non-grilled plenums, refer to Figure 7.23 below and attach the plenum brace to the top frame and the rear panel using 2 sheet-metal screws on each end. Figure 7.23 Non-grilled plenum plenum-brace attachment Item Description Topframe Sheet-metal screws Plenum brace 6 ECFans and Plenums...
  • Page 68 Attach the top panel with holes to side, rear, and edge of the plain top panel using 15 sheet-metal screws. • Attach the top panels to the top frame using 6 sheet-metal screws. Figure 7.24 Rear-discharge top-panel attachment Item Description Sheet-metal screws Toppanel (withholes) Toppanel (plain) Vertiv | Liebert® CW™Installer/User Guide...
  • Page 69 8. Attach the solid front panel and the short, solid front panel using the quarter-turn fasteners in the panels, Figure 7.25 below. Figure 7.25 Rear-discharge front-panel attachment Item Description Short front panel Front panel 6 ECFans and Plenums...
  • Page 70 9. Attach the solid front panel and the short, solid front panel using the quarter-turn fasteners in the panels, Figure 7.26 below. Figure 7.26 Non-grilled front-panel attachment Item Description Short front panel Front panel Vertiv | Liebert® CW™Installer/User Guide...
  • Page 71 Front-discharge front-panel assembly Using the channel panel and 10 sheet-metal screws, attach the grilled front panel and the short, grilled front panel, Figure 7.27 below. 2. Attach the assembled front panels to the plenum sides using 10 sheet-metal screws, 5 on each end. Figure 7.27 Front-discharge front-panel attachment Item Description...
  • Page 72 3. Attach the plain top panel and the top panel with holes to top of the plenum assembly using 39 sheet-metal screws, Figure 7.28 below. Figure 7.28 Front-discharge top-panel attachment Item Description Toppanel (withholes) Toppanel (plain) Vertiv | Liebert® CW™Installer/User Guide...
  • Page 73 7 CHECKLIST FOR COMPLETED INSTALLATION 7.1 Moving and Placing Equipment 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. 4. If equipment has been disassembled for installation, unit must be reassembled per instructions. 7.2 Electrical Installation Checks Supply voltage and phase matches equipment nameplate.
  • Page 74 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 start-up sheet, ready for completion by installer or start-up technician. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 75 8 INITIAL START-UP CHECKS AND COMMISSIONING PROCEDURE FOR WARRANTY INSPECTION WARNING! Arc flash and electric shock hazard. Open all local and remote electric power-supply disconnect switches, verify with a voltmeter that power is Off and wear appropriate, OSHA-approved personal protective equipment (PPE) per NFPA 70E before working within the electric control enclosure.
  • Page 76 • Contact your local sales representative or technical support if you have any questions or problems during unit start-up and commissioning. Visit https://www.Vertiv.com/en-us/support/ or call 1-800-543-2778 for contacts. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 77 9 TROUBLESHOOTING WARNING! Risk of electric shock. Can cause equipment damage, 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 any electric connection enclosures. Service and maintenance work must be performed only by properly trained and qualified personnel and in accordance with applicable regulations and manufacturers’...
  • Page 78 Check visually. If contact ismade, check line voltage after contactor andfusesor CBs. Humidity contact not Check for openhumidifier safety stat. Jumper betweenterminalsP35-6andP35-5. If contactor pullsin, pullingin replace safety. Remove jumper. Humidifier bulbburned Replace bulb. Loosenleadonoldbulb. Trim excessleadlengthonnewbulbto avoidshorts. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 79 Table 10.4  Reheat troubleshooting Symptom Possible Cause Check or Remedy Control not calling Check monitor status. for heat Reheat will not operate; contactor not pullingin Reheat safety stat Jumper betweenterminalsP34-1 andP34-2. If reheat operates, safety isopen. Remove open jumper. Replace safety. Reheat not operating, contactor Heater burnedout Turnoff power andcheck heater continuity withOhm meter.
  • Page 80 This page intentionally left blank Vertiv | Liebert® CW™Installer/User Guide...
  • Page 81 10 MAINTENANCE WARNING! Arc flash and electric shock hazard. Open all local and remote electric power-supply disconnect switches, verify with a voltmeter that power is Off and wear appropriate, OSHA-approved personal protective equipment (PPE) per NFPA 70E before working within the electric control enclosure.
  • Page 82 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-31075, available at www.Vertiv.com, for instructions on using the controller to predict some service maintenance intervals. •...
  • Page 83 10.2 Blower Drive System—EC Fans WARNING! Risk of electric shock. Can cause serious 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 fan-motor electric-connection enclosures. Fan-motor controls can maintain an electric charge for 10 minutes after power is disconnected.
  • Page 84 Any safety hazards stemming from the device must be re-evaluated once it is installed in the end device. Do not make any modifications, additions or conversions to the fan assembly without the approval of Vertiv. WARNING! Risk of electric shock. Can cause serious 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 fan-motor electric-connection enclosures.
  • Page 85 CAUTION: Risk of contact with hot surfaces. Can cause injury. The electronics housing, humidifier components, fan motor, and some electrical components are extremely hot during unit operation. Allow sufficient time for them to cool to a touch-safe temperature before working within the unit cabinet. Use extreme caution and wear appropriate, OSHA-approved PPE when working on or near hot components.
  • Page 86 Check mains voltage at each phase (phase to ground) at the KL1 connector. Confirms phase failure not present. • Check that the voltage is within the acceptable voltage range at the KL1 connector. Confirms line under-voltage is not present. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 87 EC-fan Low-voltage Tests • Check control input at the KL3 connector (Ain1U to GND). Confirm that there is a control voltage present at the KL3 connector. NOTE: Use the GND in the KL3 connector. Do not connect the control ground to the PE in KL1! •...
  • Page 88 Remove panels from the front of the unit. 2. Remove the humidifier pan. You can remove fans without removing the humidifier pan, but removing it makes fan removal easier, see Figure 11.1 on the facing page. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 89 Figure 11.1 Humidifier pan removal Item Description Humidifier pan Sectionnot shown Jack under raisedEC-fanmodule 10 Maintenance...
  • Page 90 If the fan module is lowered into the floor stand, refer to Figure 11.2 below and before removing any hardware, center the factory-supplied jack between the tabs on the jack support. Figure 11.2 Jack placement to support EC fan module Item Description Positionjack to support fan Tabs Vertiv | Liebert® CW™Installer/User Guide...
  • Page 91 4. Remove hardware, Figure 11.3 below, that retains the fan in the lowered position, and save it for re-installation. NOTE: Hardware quantity and location varies depending on the type of unit. Figure 11.3 Hardware removal Item Description Item Description 1/2-in. (13-mm)Hex-headbolts(typical bothsides) 4 Z bracket locationon CW076 to CW114 Fandeck Wiringloop...
  • Page 92 9. To reinstall the fan module, reverse these steps. Remove the field-supplied fan-removal device before resuming operation. NOTE: Refer to the unit's electrical schematic for specific wire-attachment points. Figure 11.4 Slide EC fan out of the unit Item Description Rear frame channel (right-side panel not shown) Front channel Fan-removal devices Vertiv | Liebert® CW™Installer/User Guide...
  • Page 93 10.2.5 Removing EC Fans from Upflow Units WARNING! Risk of electric shock. Can cause serious 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 fan-motor electric-connection enclosures. Fan-motor controls can maintain an electric charge for 10 minutes after power is disconnected.
  • Page 94 2. Locate the 6 places where the EC-fan assembly attaches to the unit, Figure 11.6 below, and remove the bolts, washers and spacers, Figure 11.7 on the facing page. Figure 11.6 Assembly in place on the unit Item Description Mountingholes Vertiv | Liebert® CW™Installer/User Guide...
  • Page 95 Figure 11.7 Bolts, washers and spacers on EC-fan assembly (6 places) Item Description Bolt Washer Spacer 10 Maintenance...
  • Page 96 The units are manufactured with factory-supplied, adjustable motor sheaves. Due to variations in application, you may want to substitute a fixed motor pulley for the adjustable sheave after you obtain and confirm the desired air flow. This substitution reduces vibration and wear on the belts and pulleys. Consult your Vertiv sales representative for more information.
  • Page 97 10.3.1 Blower Motor Lubrication • Motor is lubricated at the factory and does not require initial lubrication. • Contact the motor manufacturer for the lubrication interval for motor bearings that have grease fittings. • Contact the motor manufacturer to determine what type of grease to use for lubrication. Greases of different bases may not be compatible when mixed.
  • Page 98 8. Disconnect the drain coupling from the bottom of the pan. 9. Remove the thermostat from the bottom of the pan and the retaining screws from the sides of the pan. 10. Slide the pan out. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 99 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 11.9 below). 14. Reinstall the pan, thermostat, standpipe, drain coupling and screws into the humidifier. 15.
  • Page 100 2. Check for and clear obstructions in gravity lines leading to the condensate pump. 3. Remove the sump, clean with a stiff nylon brush and flush with water. 4. Inspect and clear clogs in the discharge check valve and float mechanism. 5. Reassemble and check for leaks. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 101 10.6 Facility Fluid and Piping Maintenance for Water and Glycol Systems Maintaining the system fluid quality is required throughout the life of the 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.
  • Page 102 This page intentionally left blank Vertiv | Liebert® CW™Installer/User Guide...
  • Page 103 11 PREVENTIVE MAINTENANCE CHECKLIST Source: DPN002952, Rev. 4 Inspection Date Job Name Indoor Unit Model # Indoor Unit Serial Number # 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 the Components and Nomenclature section.
  • Page 104 7. Check humidifier high-water alarm operation 8. Humidifier amp draw Condensate Pump (if equipped) Check for debris in sump 2. Check operation of float(s) (free movement) 3. Check/Clean discharge check valve Electrical Panel Check fuses Vertiv | Liebert® CW™Installer/User Guide...
  • Page 105 2. Check contactors for pitting (Replace if pitted) 3. Check/Re-torque wire connections 11 Preventive Maintenance Checklist...
  • Page 106 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.Vertiv.com/en-us/support/ or Call 1-800-543-2778. Vertiv | Liebert® CW™Installer/User Guide...
  • Page 107 APPENDICES Appendix A: Technical Support and Contacts A.1 Technical Support/Service in the United States Vertiv™ Group Corporation 24x7 dispatch of technicians for all products. 1-800-543-2378 Liebert® Thermal Management Products 1-800-543-2778 Liebert® Channel Products 1-800-222-5877 Liebert® AC and DC Power Products 1-800-543-2378 A.2 Locations...
  • Page 108 This page intentionally left blank Vertiv | Liebert® CW™Installer/User Guide...
  • Page 109 Appendix B: Submittal Drawings The submittal drawings are in the order of document part number (DPN). Table B.1 below, groups the drawings by topic/application. Table B.1 Submittal-drawings Contents Document Number Title Component Location DPN002869 Component Location, DownflowModels DPN002868 Component Location, UpflowModels PlanningDimensions-DownflowUnitswithECFans DPN003192 Cabinet Dimensional Data, CW038to CW084...
  • Page 110 Electrical FieldConnections, Downflow, CW146andCW181 Electrical Connections-UpflowUnits DPN003200 High-voltage Connections, Upflow, CW038to CW084 DPN004552 Low-voltage andEthernet Connections, Upflow, CW038to CW084 DPN003202 High-voltage Connections, Upflow, CW106andCW114 DPN004551 Low-voltage andEthernet Connection, Upflow, CW106andCW114 Unit-to-Unit Networking DPN004351 Liebert®iCOMUnit-to-unit Network Connections Vertiv | Liebert® CW™Installer/User Guide...
  • Page 111 LIEBERT CW PRIMARY CONNECTION LOCATIONS DOWNFLOW CW106 & CW114 W/EC FANS MODELS ALL DIMENSIONS FROM REAR CORNER OF UNIT FRONT VIEW INCLUDING PANELS CWR 3 Blower Blower Blower 35" Outlet 889mm Outlet Outlet CWS 3 CWS 2 FRONT OF UNIT SECTION A-A CWR 2 122"...
  • Page 112 LIEBERT CW UNIT PIPING CONNECTION LOCATIONS CW038 - CW084 UPFLOW MODELS W/ FORWARD CURVED BLOWERS PLENUM FIELD PIPING LOCATIONS UNIT FIELD PIPING LOCATIONS For separate steam or hot water plenum in UPFLOW units, piping Piping stubbed out inside unit end compartment for field may exit through bottom, top or sides by field connection through 2 5/8"...
  • Page 113 LIEBERT CW UNIT PIPING CONNECTION LOCATIONS CW106 & CW114 UPFLOW MODELS UNIT FIELD PIPING LOCATIONS Piping stubbed out inside unit end compartment for field connection through 13" x 6-1/2" (330 x 165mm) opening as shown. Piping may also exit through bottom of end compartment by field cutting an opening in a suitable location.
  • Page 114 LIEBERT CW FLOORSTAND & FLOOR PLANNING DIMENSIONAL DATA CW038-084 UPFLOW MODELS OPTIONAL STEAM/HOT WATER " REHEAT PIPING ENTRANCE 33" (25.4mm) LOCATION (838mm) " (76.2mm) " (203mm) 48" (1219.2mm) 72" (1828.8mm) " 97" (2463.8mm) (25.4mm) STANDARD 2" PIPING AND (50.8mm) ELECTRICAL ENTRANCE 1"...
  • Page 115 LIEBERT CW FLOORSTAND & FLOOR PLANNING DIMENSIONAL DATA CW106, CW114 UPFLOW MODELS AIR DISCHARGE 120" (3048.0 mm) OPENING 1" (25.4mm) STANDARD PIPING AND ELECTRICAL ENTRANCE LOCATION 1" (25.4mm) LEG SUPPORTS SUPPLIED ON 18, 21 & 24" HIGH MODELS H ± 1 1/2" (38mm) ELECTRICAL OPENING Height in.
  • Page 116 LIEBERT CW PRIMARY CONNECTION LOCATIONS CW146 & CW181 DOWNFLOW MODELS W/ EC FANS ALL DIMENSIONS FROM REAR CORNER OF UNIT FRONT VIEW INCLUDING PANELS Blower Blower Blower Outlet 47" Outlet Outlet 1194mm FRONT OF UNIT SECTION A-A 122" 3099mm POINT DESCRIPTION CONNECTION SIZE / OPENING CONDENSATE DRAIN...
  • Page 117 LIEBERT CW PRIMARY CONNECTION LOCATIONS DOWNFLOW MODELS CW076 & CW084 W/ EC FANS FRONT VIEW ALL DIMENSIONS FROM REAR CORNER OF UNIT INCLUDING PANELS Blower Blower 35" 889mm Outlet Outlet FRONT OF UNIT SECTION A-A 99" 2514mm POINT DESCRIPTION CONNECTION SIZE / OPENING CONDENSATE DRAIN 76 3/8"...
  • Page 118 LIEBERT CW PRIMARY CONNECTION LOCATIONS DOWNFLOW MODELS CW051 & CW060 W/ EC FANS FRONT VIEW ALL DIMENSIONS FROM RIGHT REAR CORNER OF UNIT WITH PANELS ASSEMBLED Blower Blower 35" 889mm Outlet Outlet FRONT OF UNIT SECTION A-A 74" 1880mm POINT DESCRIPTION CONNECTION SIZE / OPENING CONDENSATE DRAIN...
  • Page 119 LIEBERT CW PRIMARY CONNECTION LOCATIONS DOWNFLOW MODELS CW038 & CW041 W/ EC FANS FRONT VIEW ALL DIMENSIONS FROM RIGHT REAR CORNER OF UNIT WITH PANELS ASSEMBLED Blower 35" 889mm Outlet FRONT OF UNIT SECTION A-A 50" 1270mm POINT DESCRIPTION CONNECTION SIZE / OPENING CONDENSATE DRAIN 3/4"...
  • Page 120 LIEBERT CW FLOORSTAND & FLOOR PLANNING DIMENSIONAL DATA DOWNFLOW CW300 & CW400 Notes: 1. This floorstand should be used when EC fans are permitted to be lowered into the floorstand. 2. All paneled sides of unit overhang floorstand 1” (25mm). 3.
  • Page 121 LIEBERT CW PRIMARY CONNECTION LOCATIONS DOWNFLOW CW300 & CW400 MODELS W/ EC FANS Front View EC Fan EC Fan EC Fan Outlet Outlet Outlet CWR2 CWS2 92" 2337mm EC Fan EC Fan EC Fan 46" Outlet Outlet Outlet 1168mm CWR1 ALL DIMENSIONS FROM CWS1 FRONT CORNER OF UNIT...
  • Page 122 LIEBERT CW COMPONENT LOCATION UPFLOW MODELS Ships loose for 1. iCOM Control Display field installation 2. Electric Box 3. Filters 4. Coil 5. Motor 6. Blower 7. Fan Pulley 8. Motor Sheave & Belts 9. Infrared Humidifier (optional) 10. Reheat (optional) 11.
  • Page 123 LIEBERT CW COMPONENT LOCATION DOWNFLOW MODELS 1. iCOM Control Display 2. Electric Box 3. Filters 4. Coil 5. Infrared Humidifier (optional) 6. Reheat (optional) 7. Disconnect 8. Condensate Pump (optional) 9. EC Fans 10. Smoke Detector (optional) Front View Ships loose for field installation on CW026-CW060 units.
  • Page 124 LIEBERT CW FLOORSTAND & FLOOR PLANNING DIMENSIONAL DATA DOWNFLOW MODELS CW106 & CW114 W/ EC FANS 1" 20 1/4" 25mm 514mm Piping access 3/4" 19mm area 32" 813mm 31 1/2" 800mm CENTER FEET CENTER FEET TYP. (2) PLACES 3/4" 59 1/4" 19mm 1505mm 118 1/2"...
  • Page 125 LIEBERT CW CABINET DIMENSIONAL DATA OVERALL DOWNFLOW MODELS CW038 - CW084 W/ EC FANS CABINET RETURN F PLENUM OVERALL OVERALL UNIT & PLENUM OVERALL B AIR AIR RETURN RETURN AIR RETURN SHADED AREA INDICATES A RECOMMENDED CLEARANCE OF 36" (914mm) BE PROVIDED FOR COMPONENT ACCESS AND 9"...
  • Page 126 LIEBERT CW CABINET DIMENSIONAL DATA DOWNFLOW MODELS CW106 - CW114 W/ EC FANS OVERALL CABINET DUCT OVERALL FLANGE B FILTER PLENUM AIR RETURN DUCT FLANGE 9" 229mm 76" 1930mm 76" 1930mm SHADED AREA INDICATES A RECOMMENDED CLEARANCE OF 36" (914mm) BE PROVIDED SHADED AREA INDICATES FOR COMPONENT ACCESS A RECOMMENDED CLEARANCE...
  • Page 127 LIEBERT CW CABINET DIMENSIONAL DATA UPFLOW MODELS CW038 THRU CW084 W/ FORWARD CURVED BLOWERS 1" (25mm) duct flange for plenum alignment 35" 889mm CABINET FLANGES PROVIDED ON BLOWER(S) OUTLET FOR SUPPLY AIR DUCTING. OVERALL 72" 1829mm 1" 25mm TYP. AIR RETURN MODELS W/ REAR RETURN RETURN UNIT BASE...
  • Page 128 LIEBERT CW CABINET DIMENSIONAL DATA UPFLOW MODELS CW106, CW114 W/ FORWARD CURVED BLOWERS 34 3/4" 1" DUCT FLANGE FOR 883mm PLENUM ALIGNMENT CABINET 122" FLANGES PROVIDED ON 32" 3099mm 813mm BLOWER OUTLETS FOR OVERALL PLENUM SUPPLY AIR DUCTING FLANGE 118" 2997mm PLENUM FLANGE 76"...
  • Page 129 LIEBERT CW ELECTRICAL FIELD CONNECTIONS UPFLOW MODELS CW038 - CW084 HIGH VOLTAGE Field supplied disconnect switch when factory installed unit disconnect is not provided. Select per National and local codes. Monitoring Panel Factory installed unit disconnect switch. Three phase electric service not provided by Liebert Fused disconnect view...
  • Page 130 LIEBERT CW ELECTRICAL FIELD CONNECTIONS UPFLOW MODELS CW106 - CW114 HIGH VOLTAGE Three phase electric service not by Liebert. Field supplied disconnect switch when factory installed unit disconnect is not provided. Select per National and local codes. Factory installed unit disconnect switch. Monitoring panel.
  • Page 131 LIEBERT CW PLENUM DIMENSIONAL DATA UPFLOW MODELS CW038 - CW084 W/ FORWARD CURVED BLOWERS Note: Flanges provided on blower(s) outlet for supply air ducting when 1" solid panel plenum is used. (25mm) 1" (25mm) 2" (50mm) 18" (457mm) 1" (25mm) Both top duct openings and front grills are shown.
  • Page 132 LIEBERT CW PLENUM DIMENSIONAL DATA UPFLOW MODELS CW106 - CW114 W/ FORWARD CURVED BLOWERS 1" Note: Flanges provided 25mm on blower(s) outlet for supply air ducting when solid panel plenum is used. 2" 51mm 18" 457mm 1" 25mm Both top duct openings and front grills are shown.
  • Page 133 LIEBERT CW FLOORSTAND & FLOOR PLANNING DIMENSIONAL DATA DOWNFLOW MODELS CW146 & CW181 W/ EC FANS 1" 20 1/4" 25mm 514mm Piping access 3/4" area 19mm 43 1/2" 44" 1105mm 1118mm CENTER FEET 59 1/4" 1505mm 118 1/2" 3/4" 3010mm 19mm SUPPORTING FEET CENTERS See note 4...
  • Page 134 LIEBERT CW CABINET DIMENSIONAL DATA DOWNFLOW CW146 & CW181 W/ EC FANS AND FILTER PLENUM (plenum shipped separately) Notes: Striated area indicates the recommended minimum clearance to be provided for component access. Shaded area indicates the required minimum clearance below the unit to lower the fans into the floor. Fans may also remain in their shipped position if desired.
  • Page 135 LIEBERT CW FLOORSTAND & FLOOR PLANNING DIMENSIONAL DATA DOWNFLOW MODELS CW076 & CW084 W/ EC FANS Piping access area 1" 25" 25mm 635mm 3/4" 19mm 31 7/8" 809mm 31 1/2" 801mm CENTER FEET CENTER FEET (2) PLACES 3/4" 47 7/8" 19mm 1215mm CENTER FEET...
  • Page 136 LIEBERT CW FLOORSTAND & FLOOR PLANNING DIMENSIONAL DATA DOWNFLOW MODELS CW051 & CW060 W/ EC FANS 1" 15 3/4" 25mm 400mm 3/4" Piping access area 19mm 31 9/16" 801mm CENTER FEET 3/4" 70 9/16" 19mm 1792mm CENTER FEET See note 4 3/4"...
  • Page 137 LIEBERT CW FLOORSTAND & FLOOR PLANNING DIMENSIONAL DATA DOWNFLOW MODELS CW038 & CW041 W/ EC FANS 14" 356mm Piping access area 1" 3/4" 25mm 19mm 31 1/2" 800mm CENTER FEET 3/4" 46 1/2" 19mm 1181mm CENTER FEET See note 4 3/4"...
  • Page 138 LIEBERT CW PLENUM DIMENSIONAL DATA UPFLOW MODELS CW106, CW114 W/ EC FANS NOTE: TOP DUCT FLANGES ON PLENUM TOP FOR SUPPLY AIR DUCTING WHEN SOLID PANEL PLENUM IS USED. (25mm) 1" 1.5" (38mm) (508mm) 20" 1" (25mm) BOTH TOP DUCT OPENING AND GRILLES SHOWN.
  • Page 139 LIEBERT CW PLENUM DIMENSIONAL DATA UPFLOW MODELS CW038 - CW084 W/ EC FANS TOP DUCT FLANGES ON PLENUM TOP FOR SUPPLY AIR DUCTING WHEN SOLID PANEL PLENUM IS USED. 1" 2" (25mm) (51mm) 1" 2" (25mm) (51mm) 20" 508mm) BOTH TOP DUCT OPENINGS AND FRONT GRILL ARE SHOWN.
  • Page 140 LIEBERT CW CABINET DIMENSIONAL DATA UPFLOW MODELS CW038 - CW084 W/ EC FANS EC FAN TERMINAL BOX NOTE: DUCT FLANGES ON PLENUM PROJECTION OF TOP FOR SUPPLY AIR DUCTING WHEN 35" DISPLAY BEZEL 889mm SOLID PANEL PLENUM IS USED. 3/4" OVERALL 19mm OVERALL...
  • Page 141 LIEBERT CW CABINET DIMENSIONAL DATA UPFLOW MODELS CW038 - CW084 W/ EC FANS 1" 25mm REAR AIR RETURN MODEL RETURN AIR OPENING FRONT OF UNIT BOTTOM AIR RETURN MODEL 33" 838mm 31" 787mm BOTTOM VIEW Dimensional Data in. (mm) CHILLED WATER MODEL CW038...
  • Page 142 LIEBERT CW CABINET DIMENSIONAL DATA UPFLOW MODELS CW106 & CW114 W/ EC FANS 34 3/4" NOTE: DUCT FLANGES ON PLENUM PROJECTION OF 883mm TOP FOR SUPPLY AIR DUCTING WHEN DISPLAY BEZEL OVERALL SOLID PANEL PLENUM IS USED. 3/4" 19mm 122" 3099mm OVERALL PLENUM...
  • Page 143 LIEBERT CW CABINET DIMENSIONAL DATA UPFLOW MODELS CW106 & CW114 W/ EC FANS 24 1/4" 616mm RETURN AIR FILTER OPENING 117 1/2" 2984mm 2 1/4" RETURN AIR DUCT 57mm CONNECTION DATA 22" MODELS WITH REAR RETURN 559mm SHADED AREA INDICATES A RECOMMENDED CLEARANCE OF 25"...
  • Page 144 LIEBERT CW CABINET DIMENSIONAL DATA DOWNFLOW CW300 & CW400 W/ EC FANS & FILTER PLENUMS 118" 2997mm Opening 87" Notes: 2210mm 1. Plenums shipped separately. Opening 2. Reference DPN001693 for the electrical and plumbing requirements. 5/16" Bezel 1 3/4" Handle 44mm 91"...
  • Page 145 LIEBERT CW CABINET DIMENSIONAL DATA DOWNFLOW CW038 - CW041 W/ EC FANS & FRONT DISCHARGE 46" Opening 1168mm Notes: 1. Customer piping and wiring connections a) Standard bottom connections require unit to be placed on a minimum of a 9" floorstand. b) If unit is to be placed directly on the floor, additional modifications are required 35"...
  • Page 146 LIEBERT CW CABINET DIMENSIONAL DATA DOWNFLOW CW051 - CW084 W/ EC FANS & FRONT DISCHARGE C Opening 35" 889mm RETURN AIR 31" 787mm OPENING 33" Opening 838mm TOP VIEW 5/16" Bezel 1 3/4" Handle 44mm 36" 914mm 72" 1829mm 36" 16"...
  • Page 147 LIEBERT CW CABINET DIMENSIONAL DATA DOWNFLOW CW106 - CW114 W/ EC FANS & FRONT DISCHARGE 118" Opening 2997mm 35" RETURN AIR 889mm 30 3/4" OPENING 33" 781mm 838mm Opening 5/16" 1 3/4" Bezel TOP VIEW Handle 44mm 122" 3099mm Notes: 1.
  • Page 148 LIEBERT CW CABINET DIMENSIONAL DATA DOWNFLOW CW146 & CW181 W/ EC FANS & FRONT DISCHARGE 15" 117 11/16" 381mm 2989mm Opening 42" 9 5/8" DETAIL A 1067mm 244mm Opening TOP VIEW 18" 5/16" 45" 1 3/4" Bezel 457mm Handle 1143mm 44mm FILTER PLENUM PLENUM...
  • Page 149 LIEBERT CW GENERAL ARRANGEMENT DIAGRAM DOWNFLOW CW146 & CW181 MODELS Air Flow Bleed Valve Valve Actuator Chilled Water Return Chilled Water Coil Chilled Water Supply Shut 2-Way Chilled Water Valve Valves 2-WAY VALVE Air Flow Bleed Valve Hose Bibs Chilled Water Return Valve...
  • Page 150 LIEBERT DS, DSE, CW, PDX & PCW UNIT TO UNIT NETWORK CONNECTIONS RS485 SITE AND BMS COMMUNICATION CONNECTIONS ETHERNET DETAIL A ETHERNET CABLE (FIELD SUPPLIED) UNIT-TO-UNIT NETWORKING SWITCH (FIELD SUPPLIED) iCOM MICROPROCESSOR AND I/O BOARD TO / FROM OTHER NETWORKED UNITS P100 P95 DVI-D CABLE CONNECTION TO 7-INCH ICOM DISPLAY...
  • Page 151 LIEBERT DS, DSE, CW, PDX & PCW UNIT TO UNIT NETWORK CONNECTIONS ETHERNET CABLE (FIELD SUPPLIED) iCOM iCOM MICROPROCESSOR MICROPROCESSOR AND I/O BOARD AND I/O BOARD P100 P100 P95 DVI-D CABLE CONNECTION TO 7-INCH ICOM DISPLAY P100 POWER SUPPLY TO P95 DVI-D CABLE CONNECTION 7-INCH ICOM DISPLAY TO 7-INCH ICOM DISPLAY...
  • Page 152 LIEBERT CW ELECTRICAL FIELD CONNECTIONS DOWNFLOW MODELS CW038 - CW084 Field supplied disconnect switch when factory installed unit disconnect switch is not provided. Select per national and local codes. Factory installed unit disconnect switch. MONITORING PANEL Three phase connection. Electric service connection terminals when factory fused disconnect switch is supplied.
  • Page 153 LIEBERT CW ELECTRICAL FIELD CONNECTIONS DOWNFLOW MODELS CW038 - CW084 FOR NETWORK ETHERNET CONNECTIONS Low Voltage Communication Wiring MONITORING CAT5E Ethernet connections – field installed PANEL Avoid routing near high voltage wiring. Secure wiring to prevent damage and use bushing or edge guard to avoid sharp edges. Remove knockouts to access control board.
  • Page 154 LIEBERT CW ELECTRICAL FIELD CONNECTIONS DOWNFLOW MODELS CW106 & CW114 Monitoring Factory installed unit Panel disconnect switch. Field supplied disconnect switch when factory installed unit disconnect is not provided. Select per National and local codes. 3 phase electrical service not by Liebert. Three phase connection.
  • Page 155 LIEBERT CW ELECTRICAL FIELD CONNECTIONS DOWNFLOW MODELS CW106 & CW114 Monitoring Panel Low Voltage Communication Wiring CAT5E Ethernet connections – field installed Avoid routing near high voltage wiring. Secure wiring to prevent damage and use bushing or edge guard to avoid sharp edges. Top Entrance Remove knockout to access control board.
  • Page 156 LIEBERT CW ELECTRICAL FIELD CONNECTIONS DEFINITIONS & LOCATIONS DOWNFLOW CW146 & CW181 MODELS W/ EC FANS STANDARD ELECTRICAL CONNECTIONS Primary high voltage entrance - 2.50” (64mm); 1.75” (44mm); 1.375” (35mm) diameter concentric knockouts located in bottom of box. Primary low voltage entrance - Quantity (3) 1.125” (28mm) diameter knockouts located in bottom of box. Three phase electrical service - Terminals are on main fuse block (disregard if unit has optional disconnect switch).
  • Page 157 LIEBERT CW ELECTRICAL FIELD CONNECTIONS DEFINITIONS & LOCATIONS DOWNFLOW CW146 & CW181 MODELS W/ EC FANS Power Block Fan Transformer Fuses (B) Voltage only Condensate T6 Transformer Control Fuses 21 Terminal Block TB3 Pump Fuses Power Filter Clog Humidifier Fuses Block Switch Cover Plate/...
  • Page 158 LIEBERT CW ELECTRICAL FIELD CONNECTIONS DEFINITIONS & LOCATIONS DOWNFLOW CW146 & CW181 MODELS W/ EC FANS Filter Clog Fan Transformer Fuses Humidifier Fuses Control Switch (B) Voltage Only Fuses Reheat Fuses T6 Transformer Cover Plate/ Main Fan Condensate Pump Reversing Starter Fuses Power Block Location...
  • Page 159 LIEBERT CW ELECTRICAL FIELD CONNECTIONS UPFLOW MODELS CW106 & CW114 LOW VOLTAGE Monitoring panel. Disconnect Switch Knockout for low voltage wiring connections in top frame member. Knockout size 7/8" (22mm) Remote unit shutdown. Replace existing jumper between terminals 37 + 38 with normally closed switch having a minimum 50VA rating.
  • Page 160 LIEBERT CW ELECTRICAL FIELD CONNECTIONS UPFLOW MODELS CW106 & CW114 LOW VOLTAGE Monitoring panel. Disconnect Switch Notes: 1. To provide unit to unit (U2U) networking, the customer must first connect an Ethernet cable from P64 on the iCOM control board, to a network switch. Low Voltage Communication Wiring CAT5E Ethernet connections –...
  • Page 161 LIEBERT CW ELECTRICAL FIELD CONNECTIONS UPFLOW MODELS CW038 - CW084 LOW VOLTAGE Underside of Unit Top Back of Unit Remote unit shutdown. Replace existing jumper between terminals 37 + 38 with normally closed switch having a minimum 50VA rating. Use Factory Wiring field supplied 24V Class 2 wire.
  • Page 162 LIEBERT CW ELECTRICAL FIELD CONNECTIONS UPFLOW MODELS CW038 - CW084 LOW VOLTAGE Low Voltage Communication Wiring Monitoring panel. CAT5E Ethernet connections – field installed Avoid routing near high voltage wiring. Secure wiring to prevent damage and use bushing or edge guard to avoid sharp edges. Top Entrance Remove knockouts to access control board.
  • Page 163 LIEBERT CW GENERAL ARRANGEMENT DIAGRAM DOWNFLOW CW038 - CW114 MODELS Air Flow Bleed Valve Chilled Water Return Chilled Valve Water Actuator Coil Chilled Water Supply 2-Way Chilled Water Shut 2-WAY VALVE Valves Air Flow Hose Bibs Bleed Valve Chilled Water Return Valve Actuator...
  • Page 164 LIEBERT CW GENERAL ARRANGEMENT DIAGRAM UPFLOW 038-084, 106-114 MODELS Air Flow Chilled Water Bleed Supply Valve Valve Chilled Actuator Water Return 2-Way Chilled Chilled Water Water Valve Coil Shut 2-WAY VALVE Valves Hose Bibs Air Flow Chilled Water Supply Bleed Valve Chilled Water...
  • Page 165 LIEBERT CW PLENUM DIMENSIONAL DATA DOWNFLOW MODELS CW038 - CW084 W/ EC FANS 1" (25mm) 1" (25mm) 2" (50mm) 1" (25mm) 2" (50mm) 2" (50mm) 1" Flange must be specified on (25mm) Downflow models. Plenum Height in. (mm) Plenum Dimensional Data in. (mm) Model 20 (508) CW038, CW041...
  • Page 166 LIEBERT CW PLENUM DIMENSIONAL DATA DOWNFLOW MODELS CW106 - CW114 W/ EC FANS 1" 25mm 2" 51mm 1" 25mm 1" 25mm 2" 51mm 2" 51mm 1" 25mm Flange must be specified on Downflow Models. Plenum Height in. (mm) 20 (508) Plenum Dimensional Data in.
  • Page 167 Vertiv | Liebert® CW™Installer/User Guide...
  • Page 168 Vertiv.com | Vertiv Headquarters, 1050 Dearborn Drive, Columbus, OH, 43085, USA © 2019Vertiv GroupCorp. All rightsreserved. Vertiv andthe Vertiv logo are trademarksor registeredtrademarksof Vertiv GroupCorp. All other namesandlogosreferredto are trade names, trademarksor registeredtrademarksof their respective owners. While every precautionhasbeentakento ensure accuracy andcompletenessherein, Vertiv GroupCorp.

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