Liebert PX018 Installer's/User's Manual page 151

LIEBERT MC CONDENSER
WITH REFRIGERANT RECEIVER
CONDENSER COIL
LIQUID
Includes factory provided inverted
trap. No external trap required.
HOT GAS
DISCHARGE
LIEBERT PDX UNIT AND ASSOCIATED PIPING
Service
Valve
Valve
Check
COMPRESSOR
Electronic
Expansion Valve
REFRIGERANT PIPING
FIELD PIPING
Notes:
1. Schematic representation shown. Do not use for specific connection locations.
2. Components are not supplied by Liebert but are required for proper circuit operation and maintenance. One or more additional pressure relief valves are required downstream
of any and all field installed isolation valves. Do not isolate any refrigerant circuits from over pressurization protection.
3. A trap at the base of the riser is required for proper circuit operation.
4. Refrigerant receiver or Lee-temp receiver required with EEV PDX unit.
DPN003843
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LIEBERT PDX
PIPING SCHEMATIC
AIR COOLED MODELS WITH EEV
4
RECEIVER
LIQUID
Digital Solenoid Valve
SUCTION
Service
Valve
Sight Glass
Filter Drier
SERVICE/SCHRADER (ACCESS) CONNECTION, NO VALVE CORE.
SERVICE/SCHRADER (ACCESS) CONNECTION, WITH VALVE CORE.
LIEBERT MC CONDENSER
WITH LEE-TEMP RECEIVER
Check Valve
Relief Valve
Service
Valve
LEE-TEMP RECEIVER
CONDENSER COIL
Includes factory provided inverted
trap. No external trap required.
EVAPORATOR
COIL
Pressure
Relief
2
Valve
HOT GAS DISCHARGE
LIQUID RETURN
LIQUID RETURN
Head Pressure
Control Valve
4
LIQUID
HOT GAS DISCHARGE
For rises over 25ft. (7.6m),
trap every 20ft. (6m) or
evenly divided
2 3
Trap at base of risers
over 5ft. (1.5m)
2 3
Isolation Valve 2
Isolation Valve 2
REV DATE : 3/17
REV : 2