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Liebert
®
CW
™
Thermal Management System
System Design Manual—26 kW — 400 kW, Upflow and Downflow, 50 Hz – 60 Hz
iLiebert
®
CW
™
System Design Manual
Table of Content
1.0 Nomenclature and Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Liebert CW Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Blower Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.0 Liebert CW System Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.0 Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.0 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.1 Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.2 Cabinet and Floor-planning
Dimensions—Downflow Models with EC Fans. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.3 Cabinet and Floor-planning
Dimensions—Upflow Models with EC Fans. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.4 Cabinet and Floor-planning Dimensions
—Downflow Models with Forward-curved Blowers . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
4.5 Cabinet and Floor-planning Dimensions
—Upflow Models with Forward-curved Blowers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.6 Floor-stand Dimensions—Units with EC Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.7 Floor-stand Dimensions—Units with Forward-curved Blowers. . . . . . . . . . . . . . . . . . . . . 46
4.8 Plenum Dimensions—Units with EC Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4.9 Plenum Dimensions—Units with Forward-curved Blowers. . . . . . . . . . . . . . . . . . . . . . . . 50
5.0 Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
5.1 Piping General Arrangement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
5.2 Piping Connections—Downflow Models with EC Fans. . . . . . . . . . . . . . . . . . . . . . . . . . . 56
5.3 Piping Connections—Downflow Models with Forward-curved Blowers . . . . . . . . . . . . . . 62
5.4 Piping Connections—Upflow Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
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System Design Manual ii
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 . . . . . . . . . . 71
6.1.2 Optional Electrical Connections for Downflow Models CW146 and CW181. . . . . . . . . . . 72
6.1.3 Optional Low-Voltage Terminal Package Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . 72
6.1.4 Optional Low-Voltage Terminal Package Connections
for Downflow Models CW146 and CW181. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
6.2 Electrical Field Connections—Upflow Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Appendix A: Optional Configuration
for Liebert CW Seismic Application . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
A.1 Seismic Certification Criteria. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
A.1 Site Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
A.2 Requirements for Seismic Anchorage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
A.3 Anchor and Load Requirements of Seismic Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Appendix B: Optional Liebert Air Economizer™ for Liebert CW . . . . . . . . 95
B.1 Customer-supplied Equipment and Ductwork. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Appendix C: Guide Specifications—Chilled Water
Environmental Control System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
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CW
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System Design Manual
List of Figures
Figure 1-1: Downflow model component locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Figure 1-2: Upflow model component locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 1-3: Blower configurations—Downflow, front and rear supply, EC fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 1-4: Blower configurations—Downflow, bottom and under-floor supply, EC fans. . . . . . . . . . . . . . . . . . . . . 5
Figure 1-5: Blower configurations—Downflow, under-floor supply, forward-curved blowers . . . . . . . . . . . . . . . . . . 6
Figure 1-6: Blower configurations—Upflow, EC fans in plenum. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 1-7: Blower configurations—Upflow, front return, forward-curved blowers. . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 1-8: Blower configurations—Upflow, rear return, forward-curved blowers . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4-1: Cabinet and floor-planning dimensions, downflow, CW026 – CW084 with EC fans . . . . . . . . . . . . . . 24
Figure 4-2: Cabinet and floor-planning dimensions, downflow,
CW026, CW038 and CW041, with EC fans, front discharge. . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 4-3: Cabinet and floor-planning dimensions, downflow,
CW051, CW060, CW076 and CW084, with EC fans, front discharge . . . . . . . . . . . . . . . . . . . . . 26
Figure 4-4: Cabinet and floor-planning dimensions, downflow,
CW089, CW106 and CW114 with EC fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 4-5: Cabinet and floor-planning dimensions, downflow,
CW089, CW106 and CW114 with EC fans, front discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 4-6: Cabinet and floor-planning dimensions, downflow, CW146 and CW181 with EC fans . . . . . . . . . . . . 29
Figure 4-7: Cabinet and floor-planning dimensions, downflow
CW146 and CW181, with EC fans, front discharge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 4-8: Cabinet and floor-planning dimensions, downflow,
CW300, CW400 with EC fans and filter plenums. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 4-9: Cabinet and floor-planning dimensions, upflow, CW026 – CW084 with EC fans, front air return . . . . 32
Figure 4-10: Cabinet and floor-planning dimensions, upflow,
CW026 - CW084 with EC fans, rear and bottom air return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 4-11: Cabinet and floor-planning dimensions, upflow, CW106, CW114 with EC fans, front return. . . . . . . 34
Figure 4-12: Cabinet and floor-planning dimensions, upflow, CW106, CW114 with EC fans, rear return . . . . . . . 35
Figure 4-13: Cabinet and floor-planning dimensions, downflow,
CW026 - CW084, with forward-curved blowers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 4-14: Cabinet and floor-planning dimensions, downflow,
CW106 and CW114 with forward-curved blowers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 4-15: Cabinet and Floor-planning dimensions, upflow, CW026 – CW084 with forward-curved blowers . . 38
Figure 4-16: Cabinet and Floor-planning dimensions, upflow,
CW106 and CW114 with forward-curved blowers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 4-17: Floor-stand and floor-planning dimensions, downflow, CW026 – CW041 with EC fans . . . . . . . . . . 40
Figure 4-18: Floor-stand and floor-planning dimensions, downflow, CW051 and CW060 with EC fans . . . . . . . . 41
Figure 4-19: Floor-stand and floor-planning dimensions, downflow, CW076 and CW084 with EC fans . . . . . . . . 42
Figure 4-20: Floor-stand and floor-planning dimensions, downflow, CW089, CW106 and CW114 with EC fans . 43
Figure 4-21: Floor-stand and floor-planning dimensions, downflow, CW089, CW106 and CW114 with EC fans . 44
Figure 4-22: Floor-stand and floor-planning dimensions, downflow, CW300 and CW400 with EC fans . . . . . . . . 45
Figure 4-23: Floor-stand planning dimensions, CW026 – CW084 with forward-curved blowers. . . . . . . . . . . . . . 46
Figure 4-24: Floor-stand planning dimensions, CW106 and CW114 with forward-curved blowers. . . . . . . . . . . . 47
Figure 4-25: Plenum dimensions, upflow, CW026 — CW084 with EC fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 4-26: Plenum dimensions, upflow, CW106, CW114 with EC fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
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Figure 4-27: Plenum dimensions, upflow, CW026 – CW084 with forward-curved blowers . . . . . . . . . . . . . . . . . . 50
Figure 4-28: Plenum dimensions, upflow. CW106 and CW114 with forward-curved blowers . . . . . . . . . . . . . . . . 51
Figure 5-1: Piping general arrangement, downflow, CW026 – CW114 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Figure 5-2: Piping general arrangement, downflow, CW146 – CW181 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Figure 5-3: Piping general arrangement, upflow, CW026 – CW114 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Figure 5-4: Primary connection locations, downflow, CW026 – CW041 with EC fans. . . . . . . . . . . . . . . . . . . . . . 56
Figure 5-5: Primary connection locations, downflow, CW051 and CW060 with EC fans. . . . . . . . . . . . . . . . . . . . 57
Figure 5-6: Primary connection locations, downflow, CW076 – CW084 with EC fans. . . . . . . . . . . . . . . . . . . . . . 58
Figure 5-7: Primary connection locations, downflow, CW089, CW106 and CW114 with EC fans. . . . . . . . . . . . . 59
Figure 5-8: Primary connection locations, downflow, CW146 and CW181 with EC fans. . . . . . . . . . . . . . . . . . . . 60
Figure 5-9: Primary connection locations, downflow, CW300 and CW400 with EC fans. . . . . . . . . . . . . . . . . . . . 61
Figure 5-10: Piping connections, downflow, CW026 – CW084 with forward-curved blowers . . . . . . . . . . . . . . . . 62
Figure 5-11: Piping connections, downflow, CW106 and CW114 with forward-curved blowers . . . . . . . . . . . . . . 63
Figure 5-12: Piping connections, upflow, CW026 – CW084 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Figure 5-13: Piping connections, upflow, CW106 and CW114. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Figure 6-1: Electrical field connections, downflow, CW026 – CW084 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Figure 6-2: Electrical field connections (Ethernet), downflow, CW026 – CW084. . . . . . . . . . . . . . . . . . . . . . . . . . 68
Figure 6-3: Electrical field connections, downflow, CW089, CW106 and CW114 . . . . . . . . . . . . . . . . . . . . . . . . . 69
Figure 6-4: Electrical field connections (Ethernet), downflow, CW089, CW106 and CW114. . . . . . . . . . . . . . . . . 70
Figure 6-5: Electrical field connections, downflow, CW146 and CW181 with EC fans . . . . . . . . . . . . . . . . . . . . . 71
Figure 6-6: Electrical field connections (high voltage), upflow, CW026 – CW084 . . . . . . . . . . . . . . . . . . . . . . . . . 74
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 – CW114 . . . . . . . . . . . . . . . . . . . . . . . . . 77
Figure 6-10: Electrical field connections (low-voltage), upflow, CW089 – CW114. . . . . . . . . . . . . . . . . . . . . . . . . 78
Figure 6-11: Electrical field connections (low voltage Ethernet), upflow, CW089 – CW114. . . . . . . . . . . . . . . . . . 79
Figure A-1: Field-welding of anchor bracket—Seismic anchorage rigid floor stand, upflow, CW026 – CW114. . . 85
Figure A-2: Anchor detail—Seismic anchorage rigid floor stand, downflow, CW026 – CW181. . . . . . . . . . . . . . . 86
Figure A-3: Seismic certification as tested connection detail, upflow, CW114 and CW181 . . . . . . . . . . . . . . . . . . 87
Figure A-4: IBC-certified seismic floor stand data, downflow, CW026 – CW114 with EC fans . . . . . . . . . . . . . . . 88
Figure A-5: IBC-certified seismic floor stand data, downflow, CW146 – CW181 with EC fans . . . . . . . . . . . . . . . 89
Figure A-6: Upflow plenum seismic mounting data, CW026 – CW114 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Figure A-7: Downflow plenum seismic mounting data, CW026 – CW114 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Figure A-8: Seismic duct connection considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Figure A-9: Seismic electrical wiring considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Figure A-10: Seismic piping considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Figure B-1: Liebert Air Economizer ducting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Figure B-2: Dimensions—Liebert Air Economizer and Liebert CW models CW106D/114D . . . . . . . . . . . . . . . . . 97
Figure B-3: Dimensions—Liebert Air Economizer and Liebert CW models CW026D – CW084D. . . . . . . . . . . . . 98
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Figure B-4: Liebert Air Economizer temperature and humidity sensor wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Figure B-8: Liebert Air Economizer deactivation switch terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
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System Design Manual vi
vLiebert
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System Design Manual
List of Tables
Table 2-1: Performance data, CW026-CW400, 50/60Hz, upflow and downflow models with EC fans . . . . . . . . . . 9
Table 2-2: Performance data, CW026-CW114, 50/60Hz,
upflow and downflow models with forward-curved blowers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 2-3: Performance data for select Liebert CW Units with EC fans, High Delta T conditions . . . . . . . . . . . . . 11
Table 2-4: Motor size required to deliver rated airflow, models with forward-curved blowers . . . . . . . . . . . . . . . . 12
Table 2-5: Maximum airflow
with maximum motor size at listed static pressure, models with forward-curved blowers . . . . . . . . . 12
Table 2-6: Physical data, Liebert CW026 - CW089, 50/60Hz models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 2-7: Physical data—Liebert CW106 - CW400, 50/60Hz models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 3-1: Electrical data, Liebert CW with EC fans, 60Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 3-2: Electrical data—Forward-curved Blowers, 60Hz systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 3-3: Indoor evaporator fan motor electrical requirements—60Hz systems . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 3-4: Electrical data—EC fan models, 50Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 3-5: Electrical data—Forward-curved blowers, 50Hz systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 3-6: Indoor evaporator fan motor electrical requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table A-1: Comparison of certification criteria, 2000-2006. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Table A-2: Downflow Liebert CW models on floor stand with 36" plenum, CW026-CW081 . . . . . . . . . . . . . . . . . 82
Table A-3: Upflow Liebert CW models on floor stand with 36" plenum, CW026-CW114 . . . . . . . . . . . . . . . . . . . . 83
Table A-4: Downflow Liebert CW models on floor stand without plenum, CW026-CW081 . . . . . . . . . . . . . . . . . . 83
Table A-5: Upflow Liebert CW models on floor stand without plenum, CW026-CW114. . . . . . . . . . . . . . . . . . . . . 83
Table A-6: Upflow Liebert CW models direct mount to concrete without plenum, CW026-CW114 . . . . . . . . . . . . 84
Table A-7: Upflow Liebert CW models direct mount to concrete with 36" plenum, CW026-CW114. . . . . . . . . . . . 84
Table B-1: Dimensions—Liebert Air Economizer and Liebert CW models CW026D-CW084D . . . . . . . . . . . . . . . 98
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Liebert CW Nomenclature
1Liebert
®
CW
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System Design Manual
1.0 Nomenclature and Components
1.1 Liebert CW Nomenclature
Not all combinations of options are available on all units.
Models CW089, CW146, CW181, CW300, and CW400 only available in downflow configuration.
Balance Valve
• Not available on models CW146, CW181, CW300, CW400
Cut Down Frame Height Reduction of Downflow Units
• Not available on units with EC fans
Disconnect Switch, Locking/Non-Locking
• Not available on 208V units with 20hp motor
Flow Switch that Activates the Warning System
• Not available with two-way valve
Humidification and Reheat
• Not available on CW300 or CW400
Steam Generating Canister Humidifier
• Not available on units with EC fans
Steam Humidifier
• Steam Humidifier with upflow units requires a plenum to contain the steam distribution components.
The minimum height for this plenum is 22-3/4 in. (58 cm).
Steam/Hot Water Reheat Package
• Not available on units with EC fans
Turning Vanes
• Not available on upflow units
• Not available on units with EC fans
CW
CW = Liebert CW
Floor Mount Chilled
Water
Unit
026 D C S A 2 1234 A
Nominal Capacity, kW
026
038
041
051
060
076
084
089
106
114
146
181
300
400
D = Downflow
U = Upflow
C = Chilled Water
S = Forward-Curved Blower with
Standard Motor
V = Forward-Curved Blower with
Variable Speed Drive
1 = EC Fan
H = EC Fan with THD
2 = 2-Way Valve, Standard Pressure
3 = 3-Way Valve, Standard Pressure
1 = 2-Way Valve, High Pressure
T = 3-Way Valve, High Pressure
A-Z = Standard
configuration
S = SFA
A = 460/3/60
B = 575/3/60
C = 208/3/60
D = 230/3/60
2 = 380/3/60
F = 380/3/50
G = 415/3/50
M = 380-415/3/50
XXXX
Nomenclature and Components
Liebert
®
CW
™
System Design Manual 2
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
• Not available on 106 and 114 units with steam generating canister humidifier
• Not available on units with EC fans
• Not available on CW089, CW146, CW181, CW300 or CW400 units
Components
3Liebert
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System Design Manual
1.2 Components
Figure 1-1 Downflow model component locations
Item Description Item Description
1 iCOM control display 9 Infrared humidifier (optional)
2 Electric box 10 Reheat (optional)
3 Filters 11 Disconnect (optional)
4 Coil 12 Condensate pump (optional)
5 Motor 13 Variable-frequency drive (optional)
6Blower 14EC fans
7 Fan pulley 15 Smoke detector (optional)
8 Motor sheave and belts
Optional EC Fan Configuration
Front View
3
10
Rear View
Ships loose for field installation
on CW026-CW060 units.
1
11
15
14
9
12
4
2
5
6
7
8
13
Optional Forward-Curved Blower View
DPN002869
Rev. 3
Optional EC Fan Configuration
Nomenclature and Components
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®
CW
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System Design Manual 4
Figure 1-2 Upflow model component locations
Item Description Item Description
1 iCOM control display 9 Infrared humidifier (optional)
2 Electric box 10 Reheat (optional)
3 Filters 11 Disconnect (optional)
4 Coil 12 Condensate pump (optional)
5 Motor 13 Variable-frequency drive (optional)
6 Blower 14 Plenum with EC fans (optional)
7 Fan Pulley 15 Smoke Detector (optional)
8 Motor sheave and belts
Optional Forward-curved Blower Configuration
Front View
1
2
3
4
5
6
7
8
9
11
12
13
14
10
15
Optional EC Fan Configuration
Front View
Optional EC Fan Configuration
Rear View
Ships loose for field installation
on bottom return units.
Ships loose for
field installation
DPN002868
Rev. 1
Blower Configurations
5Liebert
®
CW
™
System Design Manual
1.3 Blower Configurations
Figure 1-3 Blower configurations—Downflow, front and rear supply, EC fans
Figure 1-4 Blower configurations—Downflow, bottom and under-floor supply, EC fans
Rear Supply
Applicable to installations
without raised floors
Front Supply
Applicable to installations
without raised floors
Under-Floor Supply
(requires 24" minimum height)
Bottom Supply
Nomenclature and Components
Liebert
®
CW
™
System Design Manual 6
Figure 1-5 Blower configurations—Downflow, under-floor supply, forward-curved blowers
Figure 1-6 Blower configurations—Upflow, EC fans in plenum
Front Throw
Rear Throw,
Front Return
Rear Return, Ducted
Blower Configurations
7Liebert
®
CW
™
System Design Manual
Figure 1-7 Blower configurations—Upflow, front return, forward-curved blowers
Figure 1-8 Blower configurations—Upflow, rear return, forward-curved blowers
Front Throw
Rear Throw
Rear Throw,
Front Throw
Nomenclature and Components
Liebert
®
CW
™
System Design Manual 8
Page intentionally left blank.
9Liebert
®
CW
™
System Design Manual
2.0 Liebert CW System Data
Table 2-1 Performance data, CW026-CW400, 50/60Hz, upflow and downflow models with EC fans
Model No. 026 038 041 051 060 076 084 089 * 106 114 146 * 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
Total Capacity, kBTUH (kW)
83.2
(24.4)
115.3
(33.8)
152.7
(44.7)
175.3
(51.4)
231.5
(67.80)
240.6
(70.50)
297.2
(87.1)
347.1
(101.7)
358.4
(105.0)
448.8
(131.5)
522.9
(153.2)
720.1
(211)
1003.0
(293.90)
1390.0
(407.3)
Sensible Capacity, kBTUH (kW) 83.2
(24.4)
113.1
(33.1)
136.6
(40.0)
173.6
(50.9)
205.5
(60.2)
230.3
(67.50)
264.7
77.60)
295.5
(86.6)
336.8
(98.7)
393.5
(115.3)
472.5
(138.4)
604.6
(177.1)
911.4
(267.0)
1163.0
(340.8)
Flow Rate, GPM (l/s) 17.6
(1.1)
24.6
(1.6)
32.3
(2.0)
37.8
(2.4)
49.4
(3.1)
51.6
(3.3)
63.1
(4.0)
72.5
(4.6)
76.6
(4.8)
95.5
(6.0)
109.2
(6.9)
151.1
(9.5)
209.9
(13.2)
292.6
(18.5)
Pressure Drop, ft (kPA) 11.8
(35.2)
18.1
(54.2)
16.4
(49.0)
9.3
(28.0)
10.2
(30.5)
10.3
(30.7)
17.9
(53.5)
21.6
(64.5)
20.1
(60.1)
35.8
(106.9)
10.9
(32.5)
25.2
(75.3)
10.1
(30.2)
23.8
(71.0)
80°F DB, 62.8°F WB (26.7°C DB, 17.1°C WB) 38% RH
Total Capacity, kBTUH (kW) 105.5
(30.9)
143.0
(41.9)
183.8
(53.9)
219.6
(64.3)
279.5
(81.9)
297.2
(87.1)
357.6
(104.8)
411.9
(120.70)
438.0
(128.3)
537.3
(157.4)
630.3
(184.7)
850.1
(249.1)
1211.0
(354.8)
1641.0
(480.8)
Sensible Capacity, kBTUH (kW) 105.5
(30.9)
140.4
(41.1)
166.6
(48.8)
217.3
(63.7)
251.1
(73.6)
285.5
(83.7)
322.7
(94.6)
356.9
(104.6)
414.6
(121.5)
478.6
(140.2)
575.6
(168.7)
728.4
(213.4)
1112.0
(325.8)
1402.0
(410.8)
Flow Rate, GPM (l/s) 22.1
(1.4)
30.1
(1.9)
38.5
(2.4)
46.6
(2.9)
59
(3.7)
62.9
(4.0)
75.1
(4.70)
85.4
(5.4)
92.4
(5.8)
113.1
(7.1)
130.6
(8.2)
177
(11.2)
251.3
(15.9)
342.6
(21.6)
Pressure Drop, ft (kPA) 18.0
(53.7)
26.7
(79.7)
22.6
(67.5)
13.8
(41.4)
14.1
(42.2)
14.8
(44.2)
24.6
(73.6)
29.2
(87.1)
28.5
(85.1)
48.9
(146)
15.1
(45.2)
33.7
(100.6)
14.1
(42.0)
31.7
(94.8)
85°F DB, 64.5°F WB (29.4°C DB, 18.1°C WB) 32.3% RH
Total Capacity, kBTUH (kW) 127.2
(37.3)
169.9
(49.8)
213.9
(62.7)
262.4
(76.9)
325.7
(95.4)
352.1
(103.2)
415.9
(121.9)
474.1
(138.9)
515.4
(151)
622.5
(182.4)
733.9
(215.0)
974.9
(285.6)
1412.0
(413.7)
1881.0
(551.1)
Sensible Capacity, kBTUH (kW) 127.2
(37.3)
167.2
(49.0)
195.7
(57.3)
259.8
(76.1)
295.4
(86.6)
339.4
(99.4)
379.2
(111.1)
416.6
(122.1)
490.9
(143.8)
561.4
(164.5)
676.1
(198.1)
848.8
(248.7)
1307.0
(383.0)
1634.0
(478.8)
Flow Rate, GPM (l/s) 26.4
(1.7)
35.5
(2.2)
44.5
(2.8)
55.2
(3.5)
68.2
(4.3)
73.9
(4.7)
86.7
(5.5)
97.8
(6.2)
107.9
(6.8)
130.1
(8.2)
151.2
(9.5)
201.9
(12.7)
291.4
(18.4)
390.6
(24.6)
Pressure Drop, ft (kPA) 25.1
(75.2)
36.5
(109.1)
29.4
(87.8)
19.0
(56.8)
18.4
(55.0)
19.9
(59.4)
32.1
(95.8)
37.4
(111.8)
38.0
(113.4)
63.3
(189.2)
19.8
(59.2)
42.9
(128.1)
18.5
(55.2)
40.3
(120.5)
CAPACITY DATA BTU/H (KW) BASED ON 50°F (10°C) ENTERING WATER, 12°F (6.66°C) WATER RISE
75°F DB, 61°F WB (23.9°C DB, 16.1°C WB) 45% RH
Total Capacity, kBTUH (kW) 46.5
(13.6)
75.3
(22.1)
102.3
(30.0)
108.3
(31.7)
152.9
(44.8)
156.5
(45.9)
198.7
(58.2)
230.1
(67.4)
238.5
(69.9)
300.4
(88.0)
351.3
(102.9)
478.1
(140.1)
672.7
(197.1)
920.3
(269.6)
Sensible Capacity, kBTUH (kW) 46.5
(13.6)
75.3
(22.1)
102.3
(30)
108.3
(31.7)
152.9
(44.8)
156.5
(45.9)
198.7
(58.2)
230.1
(67.4)
238.5
(69.9)
300.4
(88)
351.3
(102.9)
478.1
(140.1)
672.7
(197.1)
920.3
(269.6)
Flow Rate, GPM (l/s) 8.6
(0.5)
13.9
(0.9)
18.5
(1.2)
20.4
(1.3)
28.2
(1.8)
29.1
(1.8)
36.3
(2.3)
41.0
(2.6)
43.9
(2.8)
55.0
(3.5)
62.6
(4.0)
85.8
(5.4)
120.1
(7.6)
166.1
(10.5)
Pressure Drop, ft (kPA) 3.0
(9.0)
6.0
(17.9)
5.9
(17.6)
2.9
(8.6)
3.6
(10.7)
3.5
(10.5)
6.4
(19.1)
7.5
(22.4)
7.1
(21.2)
12.7
(38.0)
3.8
(11.5)
8.8
(26.4)
3.5
(10.6)
8.3
(24.8)
80°F DB, 62.8°F WB (26.7°C DB, 17.1°C WB) 38% RH
Total Capacity, kBTUH (kW) 74.5
(21.8)
104.7
(30.7)
134
(39.3)
158.6
(46.5)
202.3
(59.3)
215.5
(63.1)
260.2
(76.2)
294.9
(86.4)
320.4
(93.9)
389.4
(114.1)
461.0
(135.1)
607.6
(178)
885.4
(259.4)
1170
(342.8)
Sensible Capacity, kBTUH (kW) 74.5
(21.8)
104.7
(30.7)
134
(39.3)
158.6
(46.5)
202.3
(59.3)
215.5
(63.1)
260.2
(76.2)
294.9
(86.4)
320.4
(93.9)
389.4
(114.1)
461.0
(135.1)
607.6
(178)
885.4
(259.4)
1170
(342.8)
Flow Rate, GPM (l/s) 13.3
(0.8)
18.7
(1.2)
23.8
(1.5)
28.8
(1.8)
36.4
(2.3)
38.9
(2.5)
46.5
(2.9)
51.8
(3.3)
57.6
(3.6)
69.8
(4.4)
80.8
(5.1)
107.3
(6.8)
155.5
(9.8)
207.6
(13.1)
Pressure Drop, ft (kPA) 6.7
(20.2)
10.6
(31.7)
9.2
(27.7)
5.5
(16.4)
5.7
(17.1)
6.0
(17.9)
10.0
(30.0)
11.4
(34.2)
11.6
(34.8)
19.7
(58.9)
6.1
(18.3)
13.2
(39.6)
5.7
(17.1)
12.4
(37.2)
85°F DB, 64.5°F WB (29.4°C DB, 18.1°C WB) 32.3% RH
Total Capacity, kBTUH (kW) 97.5
(28.60)
132.5
(38.8)
164.2
(48.1)
203.6
(59.7)
248.7
(72.9)
271.5
(79.5)
318.8
(93.4)
356.5
(104.5)
398.9
(116.9)
474.6
(139.1)
565.4
(165.7)
731.1
(214.2)
1088.0
(318.8)
1412.0
(413.7)
Sensible Capacity, kBTUH (kW) 97.5
(28.60)
132.5
(38.8)
164.2
(48.1)
203.6
(59.7)
248.7
(72.9)
271.5
(79.5)
318.8
(93.4)
356.5
(104.5)
398.9
(116.9)
474.6
(139.1)
565.4
(165.7)
731.1
(214.2)
1088.0
(318.8)
1407.0
(412.3)
Flow Rate, GPM (l/s) 17.1
(1.1)
23.4
(1.50)
28.8
(1.80)
36.2
(2.3)
44.1
(2.80)
48.2
(3.0)
56.2
(3.6)
62.0
(3.9)
70.6
(4.5)
83.9
(5.3)
98.2
(6.2)
127.9
(8.1)
189.2
(11.9)
247.9
(15.6)
Pressure Drop, ft (kPA) 10.8
(32.5)
16.1
(48.2)
13.1
(39.2)
8.4
(25.3)
8.1
(24.3)
8.8
(26.5)
14.2
(42.5)
15.9
(47.5)
17.0
(50.7)
27.6
(82.6)
8.7
(26.2)
18.2
(54.4)
8.2
(24.4)
17.2
(51.4)
* Models CW089, CW146, CW181, CW300 and CW400 available only in downflow.
Liebert CW System Data
Liebert
®
CW
™
System Design Manual 10
Table 2-2 Performance data, CW026-CW114, 50/60Hz, upflow and downflow models
with forward-curved blowers
Model No. 026 038 041 051 060 076 084 106 114
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
(22.7)
107.1
(31.4)
142.8
(41.8)
236.7
(69.4)
229.5
(67.2)
231.6
(67.9)
290.6
(85.1)
345.0
(101.1)
427.8
(125.3)
Sensible Capacity, kBTUH (kW) 77.5
(22.7)
105.1
(30.8)
128
(37.50)
152.6
(44.7)
203.4
(59.6)
221.4
(64.9)
258
(75.6)
323.4
(94.8)
371.4
(108.8)
Flow Rate, GPM (l/s) 17.1
(1.1)
24.0
(1.5)
31.3
(2.0)
51.2
(3.2)
49.9
(3.2)
51.9
(3.3)
63.7
(4.0)
76.1
(4.8)
92.7
(5.9)
Pressure Drop, ft (kPA) 11.2
(33.4)
17.3
(51.7)
15.5
(46.3)
16.5
(49.3)
10.4
(31)
10.4
(31.1)
18.2
(54.5)
19.9
(59.4)
33.9
(101.2)
80°F DB, 62.8°F WB (26.7°C DB, 17.1°C WB) 38% RH
Total Capacity, kBTUH (kW) 99.2
(29.1)
133.4
(39.1)
172.6
(50.6)
376.1
(110.2)
278.1
(81.5)
288.6
(84.6)
351.7
(103.0)
424.1
(124.3)
513.0
(150.3)
Sensible Capacity, kBTUH (kW) 99.2
(29.1)
131.9
(38.6)
157.0
(46.0)
192.9
(56.5)
249.5
(73.1)
276.9
(81.1)
316.7
(92.8)
400.7
(117.4)
453.1
(132.8)
Flow Rate, GPM (l/s) 21.5
(1.4)
29.2
(1.8)
37.2
(2.4)
79.0
(5.0)
59.6
(3.8)
63.3
(4.0)
75.9
(4.8)
91.8
(5.8)
109.7
(6.9)
Pressure Drop, ft (kPA) 17.0
(51.0)
25.2
(75.3)
21.3
(63.5)
37.4
(111.7)
14.3
(42.9)
14.9
(44.6)
25.1
(75.0)
28.1
(84.1)
46.2
(138)
85°F DB, 64.5°F WB (29.4°C DB, 18.1°C WB) 32.3% RH
Total Capacity, kBTUH (kW) 120.4
(35.3)
159.5
(46.7)
201.8
(59.1)
524.1
(153.6)
324.7
(95.1)
343.8
(100.7)
410.6
(120.3)
501.0
(146.8)
595
(174.3)
Sensible Capacity, kBTUH (kW) 120.4
(35.3)
157.9
(46.3)
185.4
(54.3)
228.8
(67.0)
294.3
(86.2)
331.2
(97.0)
373.8
(109.5)
476.4
(139.6)
532.7
(156.1)
Flow Rate, GPM (l/s) 25.7
(1.6)
34.4
(2.2)
43.0
(2.7)
108.5
(6.8)
68.8
(4.3)
74.3
(4.7)
87.6
(5.5)
107.2
(6.8)
126.0
(8.0)
Pressure Drop, ft (kPA) 23.9
(71.4)
34.5
(103.0)
27.7
(82.7)
68.2
(203.7)
18.7
(56.0)
20.1
(60.1)
32.7
(97.6)
37.5
(112)
59.7
(178.3)
Capacity Data BTU/H (kW) Based on 50°F (10°C) Entering Water, 12°F (6.66°C) Water Rise
75°F DB, 61°F WB (23.9°C DB, 16.1°C WB) 45% RH
Total Capacity, kBTUH (kW) 41.0
(12.0)
68.1
(20.0)
94.4
(27.7)
101.8
(29.8)
150.3
(44.0)
147.0
(43.1)
191.2
(56)
225.8
(66.2)
281.8
(82.6)
Sensible Capacity, kBTUH (kW) 42.0
(12.0)
68.1
(20.0)
94.4
(27.7)
101.8
(29.8)
150.3
(44.0)
147
(43.1)
191.2
(56.0)
225.8
(66.2)
281.8
(82.6)
Flow Rate, GPM (l/s) 8.2
(0.5)
13.5
(0.9)
18.0
(1.1)
20.3
(1.3)
28.5
(1.8)
29.3
(1.8)
36.6
(2.3)
43.7
(2.8)
53.1
(3.4)
Pressure Drop, ft (kPA) 2.7
(8.3)
5.7
(17.1)
5.6
(16.8)
2.8
(8.5)
3.6
(10.9)
3.5
(10.6)
6.5
(19.5)
7.0
(20.9)
11.9
(35.7)
80°F DB, 62.8°F WB (26.7°C DB, 17.1°C WB) 38% RH
Total Capacity, kBTUH (kW) 69.1
(20.2)
96.8
(28.4)
125.2
(36.7)
152.1
(44.6)
200.1
(58.6)
206.4
(60.5)
253.4
(74.2)
307.2
(90.0)
367.4
(107.6)
Sensible Capacity, kBTUH (kW) 69.1
(20.2)
96.8
(28.4)
125.2
(36.7)
152.1
(44.6)
200.1
(58.6)
206.4
(60.5)
253.4
(74.2)
307.2
(90.0)
367.4
(107.6)
Flow Rate, GPM (l/s) 12.9
(0.8)
18.3
(1.2)
23.2
(1.5)
28.6
(1.8)
36.7
(2.3)
39.1
(2.5)
47.0
(3.0)
57.2
(3.6)
67.3
(4.2)
Pressure Drop, ft (kPA) 6.4
(19.2)
10.1
(30.3)
8.8
(26.4)
5.4
(16.3)
5.8
(17.4)
6.0
(18.1)
10.2
(30.6)
11.5
(34.3)
18.4
(55.1)
85°F DB, 64.5°F WB (29.4°C DB, 18.1°C WB) 32.3% RH
Total Capacity, kBTUH (kW) 91.5
(26.8)
124.0
(36.3)
154.6
(45.3)
196.9
(57.7)
247.1
(72.4)
262.7
(77)
312.6
(91.6)
385.2
(112.9)
449.3
(131.6)
Sensible Capacity, kBTUH (kW) 91.5
(26.8)
124
(36.3)
154.6
(45.3)
196.9
(57.7)
247.1
(72.4)
262.7
(77.0)
312.6
(91.6)
385.2
(112.9)
449.3
(131.6)
Flow Rate, GPM (l/s) 16.6
(1.1)
22.8
(1.4)
28
(1.8)
36.1
(2.3)
44.6
(2.8)
48.5
(3.1)
56.8
(3.6)
70.2
(4.4)
80.9
(5.1)
Pressure Drop, ft (kPA) 10.3
(30.8)
15.4
(46.0)
12.5
(37.3)
8.4
(25.1)
8.2
(24.7)
9.0
(26.8)
14.5
(43.3)
16.7
(50.1)
25.8
(77.2)
Model CW089 not available with forward-curved blowers.
/
