REV : 8
REV DATE : 12/16
DPN001884
Page :2 /3
Form No.: DPN001040_REV4
ELECTRICAL FIELD CONNECTIONS DESCRIPTIONS
LIEBERT CRV
600mm (24in.) MODELS
ELECTRICAL CONNECTIONS FOR OPTIONAL FEATURES
16) Condensate pump high water alarm (available when optional pump is installed) - On pump high water indication, normally open dry
contact is closed across terminals 88 & 89 for remote indication. 1 AMP, 24VAC max load. Use Class 1 field supplied wiring.
17) LiquiTect shutdown and dry contact (available when optional LiquiTect sensor is installed) – On LiquiTect activation, normally
open dry contact is closed across terminals 58 & 59 for remote indication. The LiquiTect sensor notifies iCOM of indication through
terminals 60 & 61. 1 AMP, 24VAC max load. Use Class 1 field supplied wiring.
18) Reheat and humidifier lockout – Remote 24VAC required at terminals 82 & 83 for lockout of reheat and humidifier.
19) Additional Common Alarm - On any alarm, one additional normally open dry contact is closed across terminals 94 & 95 for remote
indication. 1 AMP, 24VAC max load. Use Class 1 field supplied wiring.
NOTE: Refer to specification sheet for total unit full load amps, wire size amps and max overcurrent protective device size.
Important note for 460V rated Liebert CRV units (CR******A)
The electronically commutated (EC) motors included in the CRV unit are suitable for connection to an electrical service
providing input power to the unit with 300V or less line to ground potential only.
Acceptable unit input electrical service for 460V (480V) nominal units
- 480V wye with solidly grounded neutral and 277V line to ground
Un-acceptable unit input electrical service for 460V (480V) nominal units
- wye with high resistance (or impedance) ground
- delta without ground or with floating ground
- delta with corner ground
- delta with grounded center tap
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