User manual

Electrical Connections
Liebert
®
DS
™
80
17. Remote humidifier—On any call for humidification, normally open dry contact is closed across
Terminals 11 & 12 to signal field-supplied remote humidifier. 1A, 24VAC maximum load. Use
Class 1 field-supplied wiring.
18. Auxiliary cool contact—On any call for Econ-O-coil operation, normally open dry contact is
closed across Terminals 72 & 73 on dual cool units only. 1A, 24VAC maximum load. Use
field-supplied Class 1 wiring.
8.3 OPTIONAL LOW-VOLTAGE TERMINAL PACKAGE CONNECTIONS
Source: DPN000807, Rev. 8
19. Remote unit shutdown—Two additional contact pairs available for unit shutdown (labeled as
37B & 38B, 37C and 38C). Replace jumpers with field-supplied, normally closed switch having a
minimum rating of 75VA, 24VAC. Use field-supplied Class 1 wiring.
20. Common alarm—On any alarm, two additional normally open dry contacts are closed across
Terminals 94 & 95 and 96 & 97 for remote indication. 1A, 24VAC maximum load. Use
field-supplied Class 1 wiring.
21. Main fan auxiliary switch—On closure of main fan contactor, normally open dry contact is
closed across Terminals 84 & 85 for remote indication. 1A, 24VAC maximum load. Use
field-supplied Class 1 wiring.
22. Liebert Liqui-tect
™
shutdown and dry contact—On Liebert Liqui-tect activation, normally
open dry contact is closed across Terminals 58 & 59 for remote indication (Liebert Liqui-tect
sensor ordered separately). 1A, 24VAC maximum load. Use field-supplied Class 1 wiring.