Air-Cooled Models—Self-Contained Compressor
Liebert® Challenger 300034

Liebert Lee-Temp Receiver Refrigerant Level

On each receiver at the condenser are two refrigerant-level sight glasses. Refrigerant level will vary
with outside temperature. Check refrigerant level after the unit has been on for at least 15 minutes.
Sight Glass Levels
40°F (4.5°C) and lower—bottom sight glass is 3/4 full
40 to 60°F (4.5 to 15.5°C)—bottom sight glass is full
60°F (15.5°C) and higher—top sight glass is 3/4 full.
Figure 17 General arrangement—Air-cooled models with Liebert Lee-Temp
* Components are not supplied by Liebert
but are recommended for proper
circuit operation and maintenance.
** Components supplied by Liebert
and must be field-installed.
FACTORY PIPIN G
FIELD PIPING
**PipingAssembly
Condenser Coil
**Rotalock Valve
1/4" ( 6.4mm)
Pressure Relief
Valve * *
Sight Glass
Liebert
Lee-Temp
Receiver
Head Pressure
Control with
Integral Check
Valve
Check
Valve
Evaporator
Coil
Sensing Bulb
Expansion
Valve
Hot Gas
Bypass
Valve
Hot Gas
Bypass
Solenoid
Valve s
Sight Glass
Filter Drier
Shutoff
Valve *
Liquid Return External
Equalizers
Service
Valve s
Scroll
Compressor
Liquid Return
from
Condenser
Inverted trap * on
discharge and liquid
lines to extend above base
of coil by a minimum
of 7-1/2" (190mm)
OPTIONAL PIPING
Hot Gas Discharge
Check
Valve
DPN000674Rev. 3
* Trap at base
of risers longer
than 5ft. (1.5m)
* For rises over
25ft. (7.6m), trap
every 20ft. (6m) or
at evenly spaced
points (hot gas
line only)