Vertiv Liebert Drycooler - Fluid Temperature Control Quiet-Line Models

REV : 4
REV DATE : 6/19
DPN000282
Page :1 /1
Form No.: DPN001040_REV4
ELECTRICAL FIELD CONNECTIONS
LIEBERT DRYCOOLER
FLUID TEMPERATURE CONTROL QUIET-LINE MODELS
24
50
70
71
77
74
Factory wired to 24V
Class 2 control circuit
Unit Alarm Connection
Field supplied 24V
Class 2 wiring to
terminals 24 & 50 to
indicate "Standby
Glycol Pump On".
(Supplied with dual
pump controls only).
Factory wired to components
on electric panel
Electrical service connection
to fuse block (factory wired).
Electrical service connection terminals
for field wiring.
Factory installed
disconnect switch
Electric service not
provided by Liebert.
Electric service entrance.
A 7/8" (22mm) diameter hole
in a 1-1/8" (29mm) knockout
provided in bottom of electric box.
Earth ground connection (60Hz).
Connection terminal for field
supplied earth ground wire.
Earth ground bar (50Hz).
Connection terminals with factory
ground from each high voltage
component for field supplied
earth ground wire.
PUMP FUSES & OVERLOAD
HEATERS (SHIPPED WITH
STANDARD PUMP PACKAGES)
ARE TO BE FIELD INSTALLED
IN PUMP FUSE BLOCK(S) AND
STARTER(S).
Electric service connection terminals for
power supply to pumps when pump controls
are factory supplied. Dual pump connection
shown. 7/8" (22mm) diameter knockouts
provided in bottom of electric box.
Flow switch connection
(Dual pump controls only).
Field supplied 24V Class 2
wiring from terminals 74 & 77
to field mounted flow switch.
Control interlock. Field supplied
Class 2 wiring to interlock
drycooler 24V controls to Liebert
room unit (not required on
(CSU3000). 7/8" (22mm) diameter
hole provided in bottom of
electric box.
Note:
Refer to specification sheet
for full load amp and wire
size amp ratings.