Emerson CW026 Design Manual
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Emerson CW026 Design Manual

Liebert cw thermal management system
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Liebert
CW
Thermal Management System
®
™
System Design Manual—26 kW — 400 kW, Upflow and Downflow, 50 Hz – 60 Hz
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Summary of Contents for Emerson CW026

  • Page 1 Liebert Thermal Management System ® ™ System Design Manual—26 kW — 400 kW, Upflow and Downflow, 50 Hz – 60 Hz...

  • Page 3: Table Of Contents

    Table of Content 1.0 Nomenclature and Components ....... . 1 1.1 Liebert CW Nomenclature .
  • Page 4 6.0 Electrical Field Connections ........67 6.1 Electrical Field Connections—Downflow Models ....... 67 6.1.1 Standard Electrical Connections for Downflow Models CW146 and CW181 .
  • Page 5 CW026 - CW084 with EC fans, rear and bottom air return ......
  • Page 6 Figure 6-7: Electrical field connections (low voltage), upflow, CW026 – CW084......75 Figure 6-8: Electrical field connections (Ethernet), upflow, CW026 – CW084 ......76 Figure 6-9: Electrical field connections (high-voltage), upflow, CW089 –...
  • Page 7 Figure B-5: Liebert Air Economizer supply limit thermistor wiring and restricted airflow switch adjustment ..100 Figure B-6: Liebert Air Economizer damper wiring, CW026 – CW084 models ......101 Figure B-7: Liebert Air Economizer damper wiring, CW106/CW114 Models .
  • Page 8 ® ™ Liebert System Design Manual...
  • Page 9 Table 2-6: Physical data, Liebert CW026 - CW089, 50/60Hz models .......
  • Page 10 Page intentionally left blank. ® ™ Liebert System Design Manual...

  • Page 11: Nomenclature And Components

    Liebert CW Nomenclature 1.0 Nomenclature and Components 1.1 Liebert CW Nomenclature 1234 CW = Liebert CW D = Downflow A = 460/3/60 XXXX Floor Mount Chilled U = Upflow B = 575/3/60 Water C = 208/3/60 Unit D = 230/3/60 Nominal Capacity, kW 2 = 380/3/60 C = Chilled Water...
  • Page 12 Nomenclature and Components Upflow Models • Front, rear or bottom return must be specified. (Bottom return is not available on CW106 and CW114 models) THD Transformer • Available only on the Liebert CW106, CW114, CW146, or CW181 units; required for units requiring a 575V power input Variable Speed Drive •...

  • Page 13: Components

    Components 1.2 Components Figure 1-1 Downflow model component locations Optional EC Fan Configuration Ships loose for field installation Front View on CW026-CW060 units. Optional Forward-Curved Blower View Optional EC Fan Configuration DPN002869 Rear View Rev. 3 Item Description Item Description...

  • Page 14: Figure 1-2 Upflow Model Component Locations

    Nomenclature and Components Figure 1-2 Upflow model component locations Ships loose for field installation Optional EC Fan Configuration Front View Optional EC Fan Configuration Rear View Optional Forward-curved Blower Configuration Ships loose for field installation Front View on bottom return units. DPN002868 Rev.

  • Page 15: Blower Configurations

    Blower Configurations 1.3 Blower Configurations Figure 1-3 Blower configurations—Downflow, front and rear supply, EC fans Front Supply Rear Supply Applicable to installations Applicable to installations without raised floors without raised floors Figure 1-4 Blower configurations—Downflow, bottom and under-floor supply, EC fans Under-Floor Supply Bottom Supply (requires 24"...

  • Page 16: Figure 1-5 Blower Configurations-Downflow, Under-Floor Supply, Forward-Curved Blowers

    Nomenclature and Components Figure 1-5 Blower configurations—Downflow, under-floor supply, forward-curved blowers Rear Throw, Front Throw Figure 1-6 Blower configurations—Upflow, EC fans in plenum Front Return Rear Return, Ducted ® ™ Liebert System Design Manual...

  • Page 17: Figure 1-7 Blower Configurations-Upflow, Front Return, Forward-Curved Blowers

    Blower Configurations Figure 1-7 Blower configurations—Upflow, front return, forward-curved blowers Rear Throw Front Throw Figure 1-8 Blower configurations—Upflow, rear return, forward-curved blowers Front Throw Rear Throw, ® ™ Liebert System Design Manual...
  • Page 18 Nomenclature and Components Page intentionally left blank. ® ™ Liebert System Design Manual...

  • Page 19: Liebert Cw System Data

    2.0 Liebert CW System Data Table 2-1 Performance data, CW026-CW400, 50/60Hz, upflow and downflow models with EC fans Model No. 089 * 146 * 181 * 300 * 400 * CAPACITY DATA BTU/H (KW) BASED ON 45°F (7.2°C) ENTERING WATER, 10°F (5.5°C) WATER RISE 75°F DB, 61°F WB (23.9°C DB, 16.1°C WB) 45% RH...

  • Page 20: Table 2-2 Performance Data, Cw026-Cw114, 50/60Hz, Upflow And Downflow Models With Forward-Curved Blowers

    Liebert CW System Data Table 2-2 Performance data, CW026-CW114, 50/60Hz, upflow and downflow models with forward-curved blowers Model No. Capacity Data BTU/H (kW) Based on 45°F (7.2°C) Entering Water, 10°F (5.5°C) Water Rise 75°F DB, 61°F WB (23.9°C DB, 16.1°C WB) 45% RH Total Capacity, kBTUH (kW) 77.5...

  • Page 21: Table 2-3 Performance Data For Select Liebert Cw Units With Ec Fans, High Delta T Conditions

    Table 2-3 Performance data for select Liebert CW Units with EC fans, High Delta T conditions Entering Liebert CW Model Water Numbers CW106 CW114 CW146 CW181 CW300 CW400 CAPACITY DATA BTU/HR (KW) BASED ON 50°F (10°C) ENTERING WATER, 0.2" ESP WITH ASHRAE 127-2012 STANDARD Return Air Conditions of 80°F DB, 62.8°F WB, 52.3°F Dew Point (26.6°C DB, 17.1°C WB) 38.1% RH Total, kBTUH (kW) 301.6 (88.3)

  • Page 22: Table 2-4 Motor Size Required To Deliver Rated Airflow, Models With Forward-Curved Blowers

    Liebert CW System Data Table 2-4 Motor size required to deliver rated airflow, models with forward-curved blowers External Static Pressure 0.2" 0.4" 0.6" 0.8" 1.0" 1.2" 1.4" Rated Airflow Model CFM (l/s) Motor Size, hp 5050 (2383) 5850 (2761) — —...

  • Page 23: Table 2-6 Physical Data, Liebert Cw026 - Cw089, 50/60Hz Models

    Table 2-6 Physical data, Liebert CW026 - CW089, 50/60Hz models Model Sizes FAN SECTION Some options or combinations of options may result in reduced airflow. Consult your sales representative for recommendations. Fan Data - EC Fans - Available in Upflow and Downflow Orientations (CW089 available in downflow only)
  • Page 24 Liebert CW System Data Table 2-6 Physical data, Liebert CW026 - CW089, 50/60Hz models (continued) Model Sizes HUMIDIFIER SECTION Infrared Humidifier Capacity, lb/hr (kg/h) 11 (5.0) 11 (5.0) 11 (5.0) 17.4 (7.9) 17.4 (7.9) 22.1 (10) 22.1 (10) 22.1 (10) Steam Generating Humidifier, Not applicable to units with EC fans.

  • Page 25: Table 2-7 Physical Data-Liebert Cw106 - Cw400, 50/60Hz Models

    FAN SECTION Some options or combinations of options may result in reduced airflow. Consult your Emerson representative for recommendations. Fan Data - EC Fans - CW106 & CW114 are available in Upflow and Downflow Orientations. CW146 to CW400 are available in Downflow only.
  • Page 26 Liebert CW System Data Table 2-7 Physical data—Liebert CW106 - CW400, 50/60Hz models (continued) Model Sizes HUMIDIFIER SECTION Infrared Humidifier Note (50Hz Models are 22.1 lb/h (10.0 kg/h); 9.6 kW) Capacity, lb/hr (kg/h) 22.1 (10) 22.1 (10) 22.1 (10) — —...

  • Page 27: Electrical Data

    380 460 575 208 230 380 460 575 50.3 46.5 24.7 23.0 20.6 22.5 20.3 11.0 9.8 10.6 37.0 35.4 18.6 17.2 13.2 9.2 CW026 62.9 58.1 30.9 28.8 25.8 28.1 25.4 13.8 12.3 13.3 46.3 44.3 23.3 21.5 16.5 11.5 11.5 6.1 64.1...

  • Page 28: Table 3-2 Electrical Data-Forward-Curved Blowers, 60Hz Systems

    No Reheat/Humidifier Reheat/No Humidifier No Reheat/No Humidifier Models / Motor Volts 48.6 44.1 22.4 20.1 20.8 17.9 10.1 35.3 33.0 16.6 12.7 CW026 60.8 55.1 28.0 25.1 26.0 22.4 11.5 12.6 44.1 41.3 20.8 15.9 2.0 HP MFCB 51.7 46.9 23.8...
  • Page 29 Table 3-2 Electrical data—Forward-curved Blowers, 60Hz systems (continued) Reheat/Humidifier No Reheat/Humidifier Reheat/No Humidifier No Reheat/No Humidifier Models / Motor Volts 136.5 128.8 64.7 52.7 57.4 50.2 25.6 22.6 109.9 106.6 53.1 41.1 30.8 28.0 14.0 11.0 CW114 WSA 170.6 161.0 80.9 65.9 71.8 62.8...

  • Page 30: Table 3-3 Indoor Evaporator Fan Motor Electrical Requirements-60Hz Systems

    4. The values in the chart are for power of the unit only. 5. Units are 3 phase, 60 cycle. 6. For units with other variations not listed above, consult your Emerson representative for electrical requirements. 7. SCCR - Short Circuit Current Rating 65,000 rms (less than 480V), 25,000 rms (575V).

  • Page 31: Table 3-4 Electrical Data-Ec Fan Models, 50Hz

    Table 3-4 Electrical data—EC fan models, 50Hz Reheat/ No Reheat/ Reheat/ No Reheat/ Humidifier Humidifier No Humidifier No Humidifier Models Volts 25.7 11.3 19.3 CW026 32.1 14.1 24.1 33.0 11.3 26.6 CW038 41.3 14.1 33.3 33.0 11.3 26.6 CW041 41.3 14.1...

  • Page 32: Table 3-5: Electrical Data-Forward-Curved Blowers, 50Hz Systems

    No Humidifier No Humidifier Models Motor hp Volts 380-415 200 230 380-415 380-415 200 230 380-415 46.7 43.4 24.3 19.8 17.2 33.9 32.3 17.9 CW026 49.8 46.1 25.9 22.9 19.9 11.5 37.0 35.0 19.5 10.1 8.8 62.9 59.0 33.2 22.9 19.9 11.5...

  • Page 33: Dimensions

    Location Considerations 4.0 Dimensions 4.1 Location Considerations For a downflow unit, the unit can sit on an accessible, elevated flooring system. It may be necessary to furnish additional pedestal support below the unit to ensure maximum structural support. A separate floor stand for the unit may be used as support, independent of the elevated floor and installed prior to the flooring system.

  • Page 34: Cabinet And Floor-Planning Dimensions-Downflow Models With Ec Fans

    Dimensions 4.2 Cabinet and Floor-planning Dimensions—Downflow Models with EC Fans Figure 4-1 Cabinet and floor-planning dimensions, downflow, CW026 – CW084 with EC fans OVERALL CABINET RETURN F PLENUM OVERALL OVERALL UNIT & PLENUM OVERALL B AIR AIR RETURN RETURN AIR RETURN...

  • Page 35: Figure 4-2 Cabinet And Floor-Planning Dimensions, Downflow, Cw026, Cw038 And Cw041, With Ec Fans, Front Discharge

    Cabinet and Floor-planning Dimensions—Downflow Models with EC Fans Figure 4-2 Cabinet and floor-planning dimensions, downflow, CW026, CW038 and CW041, with 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"...

  • Page 36: Figure 4-3 Cabinet And Floor-Planning Dimensions, Downflow, Cw051, Cw060, Cw076 And Cw084, With Ec Fans, Front Discharge

    Dimensions Figure 4-3 Cabinet and floor-planning dimensions, downflow, CW051, CW060, CW076 and CW084, with EC fans, front discharge C Opening 35" 889mm RETURN AIR 31" 787mm OPENING 33" Opening 838mm TOP VIEW 5/16" 1 3/4" Bezel Handle 44mm 36" 914mm 72"...

  • Page 37: Cw089, Cw106 And Cw114 With Ec Fans

    Cabinet and Floor-planning Dimensions—Downflow Models with EC Fans Figure 4-4 Cabinet and floor-planning dimensions, downflow, CW089, CW106 and CW114 with EC fans OVERALL NOTE: 1. FILTERS ARE ACCESSIBLE CABINET THRU TOP OF UNIT ONLY. 2. ELECTRICAL CONNECTIONS DUCT CAN BE MADE FROM TOP OVERALL FLANGE OR BOTTOM OF UNIT.

  • Page 38: Figure 4-5 Cabinet And Floor-Planning Dimensions, Downflow, Cw089, Cw106 And Cw114 With Ec Fans, Front Discharge

    Dimensions Figure 4-5 Cabinet and floor-planning dimensions, downflow, CW089, CW106 and CW114 with EC fans, front discharge 118" Opening 2997mm 35" RETURN AIR 889mm 30 3/4" 33" OPENING 781mm 838mm Opening 5/16" 1 3/4" Bezel Handle TOP VIEW 44mm 122" 3099mm Notes: 1.

  • Page 39: Figure 4-6 Cabinet And Floor-Planning Dimensions, Downflow, Cw146 And Cw181 With Ec Fans

    Cabinet and Floor-planning Dimensions—Downflow Models with EC Fans Figure 4-6 Cabinet and floor-planning dimensions, downflow, CW146 and CW181 with EC fans 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.

  • Page 40: Figure 4-7: Cabinet And Floor-Planning Dimensions, Downflow Cw146 And Cw181, With Ec Fans, Front Discharge

    Dimensions Figure 4-7 Cabinet and floor-planning dimensions, downflow, CW146 and CW181, with EC fans, front discharge 15" 117 11/16" 381mm 2989mm Opening 42" 9 5/8" DETAIL A 1067mm 244mm Opening 18" TOP VIEW 5/16" 45" 1 3/4" Bezel 457mm Handle 1143mm 44mm FILTER PLENUM...

  • Page 41: Figure 4-8 Cabinet And Floor-Planning Dimensions, Downflow, Cw300, Cw400 With Ec Fans And Filter Plenums

    Cabinet and Floor-planning Dimensions—Downflow Models with EC Fans Figure 4-8 Cabinet and floor-planning dimensions, downflow, CW300, CW400 with EC fans and filter plenums 118" 2997mm Opening 87" Notes: 2210mm 1. Plenums shipped separately. Opening 2. Reference DPN001693 for the electrical and plumbing requirements.

  • Page 42: Cabinet And Floor-Planning Dimensions-Upflow Models With Ec Fans

    Dimensions 4.3 Cabinet and Floor-planning Dimensions—Upflow Models with EC Fans Figure 4-9 Cabinet and floor-planning dimensions, upflow, CW026 – CW084 with EC fans, front air return EC FAN TERMINAL BOX NOTE: DUCT FLANGES ON PLENUM PROJECTION OF TOP FOR SUPPLY AIR DUCTING WHEN 35"...

  • Page 43: Figure 4-10 Cabinet And Floor-Planning Dimensions, Upflow, Cw026 - Cw084 With Ec Fans, Rear And Bottom Air Return

    Cabinet and Floor-planning Dimensions—Upflow Models with EC Fans Figure 4-10 Cabinet and floor-planning dimensions, upflow, CW026 - CW084 with EC fans, rear and bottom air return 1" 25mm REAR AIR RETURN MODEL RETURN AIR OPENING FRONT OF UNIT BOTTOM AIR RETURN MODEL 33"...

  • Page 44: Figure 4-11 Cabinet And Floor-Planning Dimensions, Upflow, Cw106, Cw114 With Ec Fans, Front Return

    Dimensions Figure 4-11 Cabinet and floor-planning dimensions, upflow, CW106, CW114 with EC fans, front return 35" NOTE: DUCT FLANGES ON PLENUM PROJECTION OF 889mm TOP FOR SUPPLY AIR DUCTING WHEN DISPLAY BEZEL OVERALL SOLID PANEL PLENUM IS USED. 3/4" 19mm 122"...

  • Page 45: Figure 4-12 Cabinet And Floor-Planning Dimensions, Upflow, Cw106, Cw114 With Ec Fans, Rear Return

    Cabinet and Floor-planning Dimensions—Upflow Models with EC Fans Figure 4-12 Cabinet and floor-planning dimensions, upflow, CW106, CW114 with EC fans, rear return 24 1/4" 616mm RETURN AIR FILTER OPENING 117 1/2" 2984mm 2 1/4" RETURN AIR DUCT 57mm CONNECTION DATA 22"...

  • Page 46: Cabinet And Floor-Planning Dimensions -Downflow Models With Forward-Curved Blowers

    Dimensions 4.4 Cabinet and Floor-planning Dimensions —Downflow Models with Forward-curved Blowers Figure 4-13 Cabinet and floor-planning dimensions, downflow, CW026 - CW084, with forward-curved blowers OVERALL CABINET RETURN F PLENUM OVERALL OVERALL UNIT & PLENUM OVERALL B AIR AIR RETURN RETURN...

  • Page 47: Figure 4-14 Cabinet And Floor-Planning Dimensions, Downflow, Cw106 And Cw114 With Forward-Curved Blowers

    Cabinet and Floor-planning Dimensions —Downflow Models with Forward-curved Blowers Figure 4-14 Cabinet and floor-planning dimensions, downflow, CW106 and CW114 with forward-curved blowers OVERALL NOTE: 1. FILTERS ARE ACCESSIBLE CABINET THRU TOP OF UNIT ONLY. 2. ELECTRICAL CONNECTIONS DUCT CAN BE MADE FROM TOP OVERALL FLANGE OR BOTTOM OF UNIT.

  • Page 48: Cabinet And Floor-Planning Dimensions-Upflow Models With Forward-Curved Blowers

    Dimensions 4.5 Cabinet and Floor-planning Dimensions— Upflow Models with Forward-curved Blowers Figure 4-15 Cabinet and Floor-planning dimensions, upflow, CW026 – CW084 with forward-curved blowers 1" (25mm) duct flange for plenum alignment 35.00" 889mm CABINET FLANGES PROVIDED ON BLOWER(S) OUTLET FOR SUPPLY AIR DUCTING.

  • Page 49: Figure 4-16 Cabinet And Floor-Planning Dimensions, Upflow, Cw106 And Cw114 With Forward-Curved Blowers

    Cabinet and Floor-planning Dimensions—Upflow Models with Forward-curved Blowers Figure 4-16 Cabinet and Floor-planning dimensions, upflow, CW106 and CW114 with forward-curved blowers 35" 1" DUCT FLANGE FOR 889mm PLENUM ALIGNMENT CABINET 122" 32" FLANGES PROVIDED ON 3099mm 813mm BLOWER OUTLETS FOR OVERALL PLENUM SUPPLY AIR DUCTING...

  • Page 50: Floor-Stand Dimensions-Units With Ec Fans

    Dimensions 4.6 Floor-stand Dimensions—Units with EC Fans Figure 4-17 Floor-stand and floor-planning dimensions, downflow, CW026 – CW041 with 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 51: Figure 4-18 Floor-Stand And Floor-Planning Dimensions, Downflow, Cw051 And Cw060 With Ec Fans

    Floor-stand Dimensions—Units with EC Fans Figure 4-18 Floor-stand and floor-planning dimensions, downflow, CW051 and CW060 with 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 52: Figure 4-19 Floor-Stand And Floor-Planning Dimensions, Downflow, Cw076 And Cw084 With Ec Fans

    Dimensions Figure 4-19 Floor-stand and floor-planning dimensions, downflow, CW076 and CW084 with 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 95 1/2"...

  • Page 53: Figure 4-20 Floor-Stand And Floor-Planning Dimensions, Downflow, Cw089, Cw106 And Cw114 With Ec Fans

    Floor-stand Dimensions—Units with EC Fans Figure 4-20 Floor-stand and floor-planning dimensions, downflow, CW089, CW106 and CW114 with 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"...

  • Page 54: Figure 4-21 Floor-Stand And Floor-Planning Dimensions, Downflow, Cw089, Cw106 And Cw114 With Ec Fans

    Dimensions Figure 4-21 Floor-stand and floor-planning dimensions, downflow, CW089, CW106 and CW114 with 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 3/4"...

  • Page 55: Figure 4-22 Floor-Stand And Floor-Planning Dimensions, Downflow, Cw300 And Cw400 With Ec Fans

    Floor-stand Dimensions—Units with EC Fans Figure 4-22 Floor-stand and floor-planning dimensions, downflow, CW300 and CW400 with EC fans NOTE: 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) The floorstand used with EC units is not symmetrical and its orientation to the Liebert CW is critical for lowering the EC fans.

  • Page 56: Floor-Stand Dimensions-Units With Forward-Curved Blowers

    Dimensions 4.7 Floor-stand Dimensions—Units with Forward-curved Blowers Figure 4-23 Floor-stand planning dimensions, CW026 – CW084 with forward-curved blowers OPTIONAL STEAM/HOT WATER " 33" REHEAT OR HUMIDIFIER (25.4mm) (838mm) PIPING ENTRANCE " LOCATION (76.2mm) AIR DISCHARGE " OPENING (203mm) 48" (1219.2mm) 72"...

  • Page 57: Figure 4-24 Floor-Stand Planning Dimensions, Cw106 And Cw114 With Forward-Curved Blowers

    Floor-stand Dimensions—Units with Forward-curved Blowers Figure 4-24 Floor-stand planning dimensions, CW106 and CW114 with forward-curved blowers AIR DISCHARGE 120" (3048.0 mm) OPENING 1" (25.4mm) STANDARD PIPING AND ELECTRICAL ENTRANCE LOCATION 1" (25.4mm) LENGTH OF VANE=E-1/8" (3mm) LEG SUPPORTS SUPPLIED ON 18, 21 & 24" HIGH MODELS H ±...

  • Page 58: Plenum Dimensions-Units With Ec Fans

    Dimensions 4.8 Plenum Dimensions—Units with EC Fans Figure 4-25 Plenum dimensions, upflow, CW026 — CW084 with EC fans NOTE: TOP DUCT FLANGES ON PLENUM TOP FOR SUPPLY AIR DUCTING WHEN SOLID PANEL PLENUM IS USED. 1" 2" (25mm) (51mm) 1"...

  • Page 59: Figure 4-26 Plenum Dimensions, Upflow, Cw106, Cw114 With Ec Fans

    Plenum Dimensions—Units with EC Fans Figure 4-26 Plenum dimensions, upflow, CW106, CW114 with EC fans NOTE: TOP DUCT FLANGES ON PLENUM TOP FOR SUPPLY AIR DUCTING WHEN SOLID PANEL PLENUM IS USED. 1" (25mm) 1.5" (38mm) 20" (508mm) 1" (25mm) BOTH TOP DUCT OPENING AND GRILLES SHOWN.

  • Page 60: Plenum Dimensions-Units With Forward-Curved Blowers

    Dimensions 4.9 Plenum Dimensions—Units with Forward-curved Blowers Figure 4-27 Plenum dimensions, upflow, CW026 – CW084 with forward-curved blowers NOTE: FLANGES PROVIDED ON BLOWER(S) OUTLET 1" FOR SUPPLY AIR DUCTING (25mm) WHEN SOLID PANEL PLENUM IS USED. 1" (25mm) 2" (50mm) 18"...

  • Page 61: Figure 4-28 Plenum Dimensions, Upflow. Cw106 And Cw114 With Forward-Curved Blowers

    Plenum Dimensions—Units with Forward-curved Blowers Figure 4-28 Plenum dimensions, upflow. CW106 and CW114 with 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 62 Dimensions Page intentionally left blank. ® ™ Liebert System Design Manual...

  • Page 63: Piping

    Piping General Arrangement 5.0 Piping 5.1 Piping General Arrangement Figure 5-1 Piping general arrangement, downflow, CW026 – CW114 Air Flow Bleed Valve Valve Actuator Chilled Water Return Chilled 3-Way Chilled Water Chilled Water Coil Water Supply Valve Ball Valve Shut*...

  • Page 64: Figure 5-2 Piping General Arrangement, Downflow, Cw146 - Cw181

    Piping Figure 5-2 Piping general arrangement, downflow, CW146 – CW181 Air Flow Bleed Valve Ball Valve Valve (Optional) 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...

  • Page 65: Figure 5-3 Piping General Arrangement, Upflow, Cw026 - Cw114

    Piping General Arrangement Figure 5-3 Piping general arrangement, upflow, CW026 – CW114 Air Flow Chilled Water Supply Bleed Valve Chilled Water Return Valve Chilled Actuator Water Coil Shut* Ball Valve Valves (Optional) 3-Way Chilled Water Valve Flow 3-WAY VALVE Switch...

  • Page 66: Piping Connections-Downflow Models With Ec Fans

    Piping 5.2 Piping Connections—Downflow Models with EC Fans Figure 5-4 Primary connection locations, downflow, CW026 – CW041 with EC fans NOTE: Drawing not to scale. Tolerance on all piping locating dimensions ± 1/2" (13mm). FRONT VIEW ALL DIMENSIONS FROM RIGHT REAR CORNER OF UNIT...

  • Page 67: Figure 5-5 Primary Connection Locations, Downflow, Cw051 And Cw060 With Ec Fans

    Piping Connections—Downflow Models with EC Fans Figure 5-5 Primary connection locations, downflow, CW051 and CW060 with EC fans NOTE: Drawing not to scale. Tolerance on all piping locating dimensions ± 1/2" (13mm). FRONT VIEW ALL DIMENSIONS FROM RIGHT REAR CORNER OF UNIT WITH PANELS ASSEMBLED SECTION A-A 31"...

  • Page 68: Figure 5-6 Primary Connection Locations, Downflow, Cw076 - Cw084 With Ec Fans

    Piping Figure 5-6 Primary connection locations, downflow, CW076 – CW084 with EC fans NOTE: Drawing not to scale. Tolerance on all piping locating dimensions ± 1/2" (13mm). ALL DIMENSIONS FROM REAR CORNER OF UNIT FRONT VIEW INCLUDING PANELS SECTION A-A 31"...

  • Page 69: Figure 5-7 Primary Connection Locations, Downflow, Cw089, Cw106 And Cw114 With Ec Fans

    Piping Connections—Downflow Models with EC Fans Figure 5-7 Primary connection locations, downflow, CW089, CW106 and CW114 with EC fans NOTE: Drawing not to scale. Tolerance on all piping dimensions is ± 1/2" (13mm). ALL DIMENSIONS FROM REAR CORNER OF UNIT FRONT VIEW INCLUDING PANELS SECTION A-A...

  • Page 70: Figure 5-8 Primary Connection Locations, Downflow, Cw146 And Cw181 With Ec Fans

    Piping Figure 5-8 Primary connection locations, downflow, CW146 and CW181 with EC fans NOTE: Drawing not to scale. Tolerance on all piping dimensions is ± 1/2" (13mm). ALL DIMENSIONS FROM REAR CORNER OF UNIT FRONT VIEW INCLUDING PANELS SECTION A-A 41"...

  • Page 71: Figure 5-9 Primary Connection Locations, Downflow, Cw300 And Cw400 With Ec Fans

    Piping Connections—Downflow Models with EC Fans Figure 5-9 Primary connection locations, downflow, CW300 and CW400 with EC fans NOTE: Drawing not to scale. Tolerance on all piping dimensions FRONT VIEW is ± 1/2" (13mm). SECTION A-A CWR2 CWS2 92" 2337mm 41"...

  • Page 72: Piping Connections-Downflow Models With Forward-Curved Blowers

    Piping 5.3 Piping Connections—Downflow Models with Forward-curved Blowers Figure 5-10 Piping connections, downflow, CW026 – CW084 with forward-curved blowers NOTE: Install all piping per local codes. C - Steam Reheat Supply Line Condensate Drain. Field pitch a min. of D - Hot Water Reheat Supply Line.

  • Page 73: Figure 5-11 Piping Connections, Downflow, Cw106 And Cw114 With Forward-Curved Blowers

    Piping Connections—Downflow Models with Forward-curved Blowers Figure 5-11 Piping connections, downflow, CW106 and CW114 with forward-curved blowers NOTE: Install all piping per local codes. Monitoring Panel 3/4" NPT Steam Generating Canister Humidifier Drain. Field pitch a min. of 1/8" (3mm) per ft. (305mm). Do not install an external trap. B - Chilled Water Return Line 1/4"...

  • Page 74: Piping Connections-Upflow Models

    Piping 5.4 Piping Connections—Upflow Models Figure 5-12 Piping connections, upflow, CW026 – CW084 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 com partment for field may exit through bottom, top or sides by field connection through 2 5/8"...

  • Page 75: Figure 5-13 Piping Connections, Upflow, Cw106 And Cw114

    Piping Connections—Upflow Models Figure 5-13 Piping connections, upflow, CW106 and CW114 A - Chilled Water Supply Line. UNIT FIELD PIPING LOCATIONS 2-5/8" O.D. CU on 3 way Piping stubbed out inside unit end compartment for field front return units only. connection through 13"...
  • Page 76 Piping Page intentionally left blank. ® ™ Liebert System Design Manual...

  • Page 77: Electrical Field Connections

    Electrical Field Connections—Downflow Models 6.0 Electrical Field Connections 6.1 Electrical Field Connections—Downflow Models Figure 6-1 Electrical field connections, downflow, CW026 – CW084 Field supplied disconnect switch when factory installed unit disconnect switch is not provided. Select per national and local codes.

  • Page 78: Figure 6-2 Electrical Field Connections (Ethernet), Downflow, Cw026 - Cw084

    Electrical Field Connections Figure 6-2 Electrical field connections (Ethernet), downflow, CW026 – CW084 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.

  • Page 79: Figure 6-3 Electrical Field Connections, Downflow, Cw089, Cw106 And Cw114

    Electrical Field Connections—Downflow Models Figure 6-3 Electrical field connections, downflow, CW089, CW106 and CW114 Monitoring Factory installed unit Panel disconnect switch (optional) 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.

  • Page 80: Figure 6-4 Electrical Field Connections (Ethernet), Downflow, Cw089, Cw106 And Cw114

    Electrical Field Connections Figure 6-4 Electrical field connections (Ethernet), downflow, CW089, CW106 and 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 81: Standard Electrical Connections For Downflow Models Cw146 And Cw181

    2. Primary low voltage entrance—Quantity (3) 1-1/8” (28mm) diameter knockouts in bottom of box 3. Three-phase electrical service—Terminals are on main fuse block (disregard if unit has optional disconnect switch). Three-phase service not by Emerson. 4. Earth ground—Terminal for field-supplied earth grounding wire.

  • Page 82: Optional Electrical Connections For Downflow Models Cw146 And Cw181

    12. Three-phase electrical service—Terminals are on top of disconnect switch. Three-phase service not by Emerson. 13. Smoke sensor alarm—Factory-wired dry contacts from smoke sensor are 91-common, 92-NO, and 93-NC. Supervised contacts, 80 and 81, open on sensor trouble indication. This smoke sensor is not intended to function as, or replace, any room smoke detection system that may be required by local or national codes.

  • Page 83: For Downflow Models Cw146 And Cw181

    Electrical Field Connections—Downflow Models 6.1.4 Optional Low-Voltage Terminal Package Connections for Downflow Models CW146 and CW181 Refer to Figure 6-5. 22. Remote unit shutdown—Two additional contact pairs available for unit shutdown (labeled as 37B & 38B, 37C & 38C). Replace jumpers with field-supplied, normally closed switch that has a minimum 75VA, 24VAC rating.

  • Page 84: Electrical Field Connections-Upflow Models

    Electrical Field Connections 6.2 Electrical Field Connections—Upflow Models Figure 6-6 Electrical field connections (high voltage), upflow, CW026 – CW084 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 (optional)

  • Page 85: Figure 6-7 Electrical Field Connections (Low Voltage), Upflow, Cw026 - Cw084

    Electrical Field Connections—Upflow Models Figure 6-7 Electrical field connections (low voltage), upflow, CW026 – CW084 Intellislot Housings. Underside of Unit Top Optional Monitoring and Communication cards inserted here. Back of Unit Remote unit shutdown. Replace existing Factory Wiring jumper between terminals 37 + 38 with normally closed switch having a minimum 50VA rating.

  • Page 86: Figure 6-8 Electrical Field Connections (Ethernet), Upflow, Cw026 - Cw084

    Electrical Field Connections Figure 6-8 Electrical field connections (Ethernet), upflow, CW026 – CW084 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.

  • Page 87: Figure 6-9 Electrical Field Connections (High-Voltage), Upflow, Cw089 - Cw114

    Electrical Field Connections—Upflow Models Figure 6-9 Electrical field connections (high-voltage), upflow, CW089 – CW114 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 (optional). Monitoring panel.

  • Page 88: Figure 6-10 Electrical Field Connections (Low-Voltage), Upflow, Cw089 - Cw114

    Electrical Field Connections Figure 6-10 Electrical field connections (low-voltage), upflow, CW089 – CW114 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 89: Figure 6-11 Electrical Field Connections (Low Voltage Ethernet), Upflow, Cw089 - Cw114

    Electrical Field Connections—Upflow Models Figure 6-11 Electrical field connections (low voltage Ethernet), upflow, CW089 – CW114 Monitoring panel. Disconnect Switch Notes: 1. To provide unit to unit (U2U) networking, unplug the cable from P64 on the iCOM board and from ETH-1 on the touch screen display.
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  • Page 91: Appendix A: Optional Configuration For Liebert Cw Seismic Application

    The International Code Council’s, International Building Code (IBC) has become the primary code document for the design and installation of building systems. Emerson Network Power has conducted analytical modeling and dynamic shake table testing of the Liebert CW product to provide an option for those systems requiring seismic certification of compliance.

  • Page 92: Requirements For Seismic Anchorage

    Data is presented by system configuration. The maximum system loads are given for each loading location or floor stand foot. The maximum load at the anchor is provided for proper sizing of the anchors (not provided by Emerson). A.3.1 Seismic Anchorage Surface Structural floors and housekeeping pads must also be seismically designed and approved by the project structural engineer of record to withstand the seismic anchor loads as defined on the installation drawings.

  • Page 93: Table A-3 Upflow Liebert Cw Models On Floor Stand With 36" Plenum, Cw026-Cw114

    Anchor and Load Requirements of Seismic Installation Table A-3 Upflow Liebert CW models on floor stand with 36" plenum, CW026-CW114 Maximum Load Maximum Load Floor Anchors per Anchor per Location Stand Operating Restraint Model Number Height Mass * Locations Tension...

  • Page 94: Table A-6 Upflow Liebert Cw Models Direct Mount To Concrete Without Plenum, Cw026-Cw114

    1074.2 303.9 CW089-CW114UCS 2065 1094.7 Operating mass includes the operating water volume, floor stand and plenum. Table A-7 Upflow Liebert CW models direct mount to concrete with 36" plenum, CW026-CW114 Maximum Load per Anchor Operating Restraint Anchors Model Number Mass *...

  • Page 95: Figure A-1 Field-Welding Of Anchor Bracket-Seismic Anchorage Rigid Floor Stand, Upflow, Cw026 - Cw114

    Electrical wiring, conduit, and/or other connections to the equipment is the responsibility of others. Data and recommendations are supplied here and in the unit installation supplement for seismic installation. Figure A-1 Field-welding of anchor bracket—Seismic anchorage rigid floor stand, upflow, CW026 – CW114 FIELD WELDING OF ANCHOR BRACKET TYPICAL 4 PLACES 1/8"...

  • Page 96: Figure A-2 Anchor Detail-Seismic Anchorage Rigid Floor Stand, Downflow, Cw026 - Cw181

    Optional Configuration for Liebert CW Seismic Application Figure A-2 Anchor detail—Seismic anchorage rigid floor stand, downflow, CW026 – CW181 ANCHOR DETA IL TYPICAL 6 PLACES 2.5" 64mm MIN. EDGE DISTANCE ANSI B18.22.1 TYPE A, SERIES W PLAIN WASHER REQUIRED AT EACH ANCHOR LOCAITON *MIN.

  • Page 97: Figure A-3 Seismic Certification As Tested Connection Detail, Upflow, Cw114 And Cw181

    Anchor and Load Requirements of Seismic Installation Figure A-3 Seismic certification as tested connection detail, upflow, CW114 and CW181 FLOORSTAND SUPPORTED LIBERT CW ANCHORAGE 4 PLACES FRONT 2 PLACES PLAN VIEW OF UNIT ATTACHMENT DETAIL G TOTAL 'C' - 7/8" GRADE 7 THREADED RODS WITH 1/8"...

  • Page 98: Figure A-4 Ibc-Certified Seismic Floor Stand Data, Downflow, Cw026 - Cw114 With Ec Fans

    Optional Configuration for Liebert CW Seismic Application Figure A-4 IBC-certified seismic floor stand data, downflow, CW026 – CW114 with EC fans 18.4" 467mm 4.6" 117mm Foot Detail * Foot provides ±1.5" (38mm) adjustment from nominal height H NOTE: JACK 1. The floor stand used with EC units is not symmetrical and its orientation to the Liebert CW is critical to lowering the EC fans.

  • Page 99: Figure A-5 Ibc-Certified Seismic Floor Stand Data, Downflow, Cw146 - Cw181 With Ec Fans

    Anchor and Load Requirements of Seismic Installation Figure A-5 IBC-certified seismic floor stand data, downflow, CW146 – CW181 with EC fans 18.5" 469mm 7" 171mm 4.6" 117mm Foot Detail JACK * Foot provides ±1.5" (38mm) NOTE: adjustment from nominal height H 1.

  • Page 100: Figure A-6 Upflow Plenum Seismic Mounting Data, Cw026 - Cw114

    Optional Configuration for Liebert CW Seismic Application Figure A-6 Upflow plenum seismic mounting data, CW026 – CW114 NOTE: FLANGES PROVIDED ON BLOWER(S) OUTLET FOR SUPPLY AIR DUCTING WHEN SOLID PANEL PLENUM IS USED. INTERMEDIATE SUPPORT BOTH TOP DUCT OPENING AND PANEL(S) PROVIDED ON FRONT GRILL ARE SHOWN.

  • Page 101: Figure A-7 Downflow Plenum Seismic Mounting Data, Cw026 - Cw114

    Anchor and Load Requirements of Seismic Installation Figure A-7 Downflow plenum seismic mounting data, CW026 – CW114 NOTE: FLANGES PROVIDED ON BLOWER(S) OULET FOR SUPPLY AIR DUCTING WHEN SOLID PANEL PLENUM IS USED. INTERMEDIATE SUPPORT PANEL(S) PROVIDED ON IBC CERTIFIED TOP DUCT...

  • Page 102: Figure A-8 Seismic Duct Connection Considerations

    Optional Configuration for Liebert CW Seismic Application Figure A-8 Seismic duct connection considerations Seismic compensation Seismic compensation DOWNFLOW DUCTING EXAMPLE FOR SEISMIC APPLICATIONS Seismic compensation Seismic compensation UPFLOW DUCTING EXAMPLE FOR SEISMIC APPLICATIONS All ducted units, either rigidly mounted or mounted on vibration isolators, shall be attached to the ducting system using flexible duct designed for seismic movement.

  • Page 103: Figure A-9 Seismic Electrical Wiring Considerations

    Anchor and Load Requirements of Seismic Installation Figure A-9 Seismic electrical wiring considerations UPFLO W MO DELS Field supplied disconnect switch Seismic compensation when factory installed unit disconnect switch is not provided. Three phase electrical and low voltage connections not by Liebert (CW106U & CW114U ONLY). Factory installed unit disconnect switch (optional).

  • Page 104: Figure A-10 Seismic Piping Considerations

    Optional Configuration for Liebert CW Seismic Application Figure A-10 Seismic piping considerations Unit Unit Secure pipes to floorstand Anchor piping to unit Prefabricated seismic compensation piping Prefabricated seismic compensation piping Anchor Piping FLOORSTAND MOUNT FLOOR MOUNT Upflow with floorstand: anchor to floorstand Anchor to Upflow rigid mount: anchor to unit foundation...

  • Page 105: Appendix B: Optional Liebert Air Economizer™ For Liebert Cw

    Customer-supplied Equipment and Ductwork Appendix B: Optional Liebert Air Economizer™ for Liebert CW The Liebert Air Economizer is an option for Liebert CW chilled water downflow units, Liebert DS™ downflow units and Liebert PDX/PCW downflow units. The Liebert Air Economizer uses cool outdoor air in ®...

  • Page 106: Figure B-1 Liebert Air Economizer Ducting Data

    Optional Liebert Air Economizer™ for Liebert CW Figure B-1 Liebert Air Economizer ducting data Outdoor Relief Opening ROOM RETURN (by others) Return Air Sensors (Field install above damper) RELIEF AIR Room Relief Air Discharge Plenum (Sized and provided by others) Outdoor Air Sensors (Field install inside duct) Filter...

  • Page 107: Figure B-2 Dimensions-Liebert Air Economizer And Liebert Cw Models Cw106D/114D

    Customer-supplied Equipment and Ductwork Figure B-2 Dimensions—Liebert Air Economizer and Liebert CW models CW106D/114D Typical unit shown. Refer to dimensions and layout for your unit. Front of unit Room Return Air Damper TOP VIEW 118" Duct Flange 2996mm 34" 864mm 122"...

  • Page 108: Figure B-3 Dimensions-Liebert Air Economizer And Liebert Cw Models Cw026D - Cw084D

    Optional Liebert Air Economizer™ for Liebert CW Figure B-3 Dimensions—Liebert Air Economizer and Liebert CW models CW026D – CW084D Room Return Air Damper Front of unit TOP VIEW "A" Duct Flange "B" 34" 864mm 2" "C" 30 1/16" 51mm 1" 764mm 25mm 1"...

  • Page 109: Figure B-4 Liebert Air Economizer Temperature And Humidity Sensor Wiring

    Customer-supplied Equipment and Ductwork Figure B-4 Liebert Air Economizer temperature and humidity sensor wiring SECURE RING TERMINAL BOTH SENSORS (FOR SENSOR CABLE SHIELD) AND CABLES INTO BACK OF ELECTRIC BOX ARE SHIPPED (EARTH GROUND) IN BOXES INSIDE ECONOMIZER CONNECT P67 ON THE CONTROL BOARD RETURN AIR TO P66 ON THE...

  • Page 110: Figure B-5 Liebert Air Economizer Supply Limit Thermistor Wiring And Restricted Airflow Switch Adjustment

    Figure B-5 Liebert Air Economizer supply limit thermistor wiring and restricted airflow switch adjustment RETURN AIR T/H SENSOR 120" FRAME, CHILLED WATER RESTRICTED AIR FLOW SWITCH LOCATION LIEBERT DS + CW026-CW084 RESTRICTED AIR FLOW SWITCH LOCATION FACTORY CONNECTED UNCOIL AND...

  • Page 111: Figure B-6 Liebert Air Economizer Damper Wiring, Cw026 - Cw084 Models

    Customer-supplied Equipment and Ductwork Figure B-6 Liebert Air Economizer damper wiring, CW026 – CW084 models RETURN AIR RETURN AIR T/H SENSOR DAMPER OUTDOOR AIR DAMPER OUTDOOR AIR T/H SENSOR (IDENTIFIED WITH OUTDOOR LABEL) ROUTE CABLES FIELD SUPPLIED THROUGH HOLES OUTDOOR AIR DUCT...

  • Page 112: Figure B-7 Liebert Air Economizer Damper Wiring, Cw106/Cw114 Models

    Optional Liebert Air Economizer™ for Liebert CW Figure B-7 Liebert Air Economizer damper wiring, CW106/CW114 Models RETURN AIR RETURN AIR DAMPER T/H SENSOR OUTDOOR AIR DAMPER OUTDOOR AIR T/H SENSOR (IDENTIFIED WITH OUTDOOR LABEL) FIELD SUPPLIED OUTDOOR AIR DUCT ROUTE CABLES THROUGH HOLES IN TOP OF ELECTRIC...

  • Page 113: Figure B-8 Liebert Air Economizer Deactivation Switch Terminals

    Customer-supplied Equipment and Ductwork Figure B-8 Liebert Air Economizer deactivation switch terminals RETURN AIR DAMPER OUTDOOR AIR DAMPER LOW VOLTAGE CUSTOMER CONNECTION AREA, 120" FRAME CHILLED WATER SHOWN ALTERNATE LOCATION IN SMALLER CHILLED WATER UNITS IS OPPOSITE END OF ELECTRIC BOX ALTERNATE LOCATION ON LIEBERT DS, TERMINALS LOCATED...
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  • Page 115: Appendix C: Guide Specifications-Chilled Water Environmental Control System

    SERVICEABILITY/ ACCESS The cabinet shall be designed so that all components are easily accessible for service and maintenance through the unit's side and front [CW026-084], front [CW089-181]. ACCEPTABLE ALTERNATIVES Acceptable alternatives shall be permitted with engineer's prior approval only. Contractor to submit a detailed summary form listing all variations to include size deviations, electrical load differences, functional and component changes and savings to end user.
  • Page 116 Guide Specifications—Chilled Water Environmental Control System Product FRAME The frame shall be constructed of welded tubular steel. It shall be painted using the autophoretic coating process for maximum corrosion protection. 2.1.1 Downflow Air-flow Configurations 2.1.1.1 Downflow Air Supply The supply air shall exit from the bottom of the unit. 2.1.1.2 Downflow Air, EC Fans Lowered into Floor Stand The supply air shall exit from all sides of the floor stand.
  • Page 117 FILTERS The filter chambers for CW026-084 filters are located within the cabinet and serviceable from either end of the unit. The filter chambers for CW106 and CW114 are located within the cabinet and serviceable from the front of the unit.
  • Page 118 EC fans shall be available on upflow models and fans shall operate outside the unit in a factory-provided plenum. • Upflow CW026–114: The fan motor(s) shall be 4.0 hp (3.0 kW) with maximum speed of 1520 rpm; quantity 1 for CW026–41; 2 for CW051–084; 3 for CW106–114.
  • Page 119 A-FRAME CHILLED WATER COIL The cooling coil shall be of A-frame design with a minimum of ____ ft ) face area, ____ rows deep. The coil shall be controlled by a 3-way modulating control valve. It shall be constructed of copper tubes and aluminum fins and have a maximum face velocity of ____ ft per minute (m/s) at ____ CFM (m The water circuit shall be designed to distribute water into the entire coil face area.
  • Page 120 Guide Specifications—Chilled Water Environmental Control System Controls ® ® LIEBERT ICOM MICROPROCESSOR CONTROL WITH 9-IN. COLOR TOUCHSCREEN The Liebert iCOM shall be microprocessor-based with a 9" color touchscreen display and shall be mounted in an ergonomic, aesthetically pleasing housing. The display and housing shall be viewable while the front panel is open or closed.
  • Page 121 • Sensor Calibration – The menus shall allow unit sensors to be calibrated with external sensors. • Maintenance/Wellness Settings - The menus shall allow reporting of potential component problems before they occur. • Options Setup - The menus shall provide operation settings for the installed components. •...
  • Page 122 Guide Specifications—Chilled Water Environmental Control System ® LIEBERT ICOM CONTROL METHODS AND OPTIONS The Liebert iCOM shall be factory-set to allow precise monitoring and control of the condition of the air entering and leaving the unit. This control shall include predictive methods to control air flow and cooling capacity based control sensors installed.
  • Page 123 MULTI-UNIT COORDINATION ® Liebert iCOM teamwork shall save energy by preventing multiple units in an area from operating in opposing modes. Teamwork shall allow the control to optimize a group of connected cooling units equipped with Liebert iCOM using the U2U (Unit-to-Unit) network. There shall be three modes of teamwork operation: •...
  • Page 124 Guide Specifications—Chilled Water Environmental Control System VIRTUAL BACK-DRAFT DAMPER ® Liebert iCOM shall allow the use of a virtual back-draft damper, eliminating the need for a mechanical damper. This shall allow the fans to spin slowly (15% or less) to act as a damper. SYSTEM AUTO RESTART The auto restart feature shall automatically restart the system after a power failure.
  • Page 125 Miscellaneous Options FLOW SWITCH—OPTIONAL The flow switch shall activate the alarm system should the chilled water supply be interrupted. The switch shall be factory mounted and wired. VARIABLE SPEED DRIVE—OPTIONAL A variable speed drive (VSD) is available for models CW106 and CW114 to reduce energy consumption. The fan motor speed shall be varied from 100% to 60% of rated speed in response to room conditions.
  • Page 126 Guide Specifications—Chilled Water Environmental Control System CHILLED WATER VALVE FEEDBACK—OPTIONAL The control shall be designed to monitor valve feedback. The control shall notify the user of valve failure through the local display and remote monitoring. 4.10 DUAL CHILLED WATER VALVE STAGING—OPTIONAL The control shall provide special staging options on dual chilled water valve applications.
  • Page 127 The secondary float shall send a signal to the local alarm and shut-down the unit upon a high-water condition. The unit shall be shipped loose for field installation on Chilled Water units that are upflow with bottom return. They are also shipped loose for under-floor field installation on CW026- CW060 units with EC fans.
  • Page 128 Guide Specifications—Chilled Water Environmental Control System 4.21 FLOOR STAND—OPTIONAL The floor stand shall be constructed of a heliarc-welded, tubular steel frame. The floor stand shall have adjustable legs with vibration isolation pads. The floor stand shall be ____ in. (mm) high. 4.21.1 EC-fan Lowering Jack—Optional An EC-fan lowering jack shall be supplied to assist the lowering of EC fans from downflow unit into the floor stand.
  • Page 129 Execution INSTALLATION OF THERMAL MANAGEMENT UNITS 5.1.1 General The user shall install Thermal Management units in accordance with manufacturer’s installation instructions. The units shall be installed plumb and level, firmly anchored in locations indicated and shall maintain manufacturer’s recommended clearances. 5.1.2 Electrical Wiring The user shall install and connect electrical devices furnished by the manufacturer but not specified to be...
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  • Page 131 OMPLIANCE WITH UROPEAN NION IRECTIVES Fabbricante – Manufacturer – Hersteller – Fabricant – Fabricante Fabricante – Tillverkare – Fabrikant – Valmistaja – Produsent Κατασκευαστής – Producent Fabrikant – Liebert Corporation 1050 Dearborn Drive P.O. Box 29186 Columbus, OH 43229 Il Produttore dichiara che, se munito di marchio CE, il prodotto è conforme alle direttive dell'Unione europea: The Manufacturer hereby declares that this product, when bearing the CE mark, conforms to the European Union directives:...
  • Page 132 © 2017 Liebert Corporation All rights reserved throughout the world. Specifications subject to changewithout notice. ® Liebert is a registered trademark of Liebert Corporation. All names referred to are trademarks or registered trademarks of their respective owners. SL-18061_REV1_1-17 590-1335-501B Emerson Network Power www.emersonnetworkpower.com...

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