Emerson Liebert Challenger 3000 - Figure 42 3-Ton Water;Glycol-Cooled Condensing Unit (Cont.)

Split System Models
74
Figure 42 3-ton water/glycol-cooled condensing unit (con't.)
DPN000209_Rev0
Single- or
three-phase
electric service
not by Liebert
Field-supplied unit disconnect
switch when optional disconnect
is not provided in unit
Field-supplied 24V NEC Class 1
wiring to fan/coil unit
Field-supplied 24V NEC Class 1
wiring to drycooler
(glycol-cooled units only)
Earth/ground connection
Connection terminal for field-supplied
earth-grounding wire
Line-voltage electric
power supply entrance
Factory-wired components
on electric panel
Optional factory-installed
disconnect switch
Low-voltage electric
power supply entrance
Remote drycooler connection
Terminals 70 & 71 supplied
for connection to remote drycooler
Use field-supplied 24V NEC Class 1
wiring (glycol-cooled units only)
Heat rejection connection.
Field-supplied 24V NEC Class 2 wiring.
Wire connections from evaporator mod:
1. 24V GND
2. 24V supply
3. High-pressure alarm (optional)
4. Hot gas bypass connection
(only on units with hot-gas bypass)
NOTES
1. Refer to specification sheet for full load amp
and wire size amp ratings.
2. Control voltage wiring must be a minimum
of 16 GA (1.6mm) for up to 75' (23m) or
not to exceed 1 volt drop in control line.