PIPING SCHEMATIC
AIR COOLED MODELS WITH EEV
LIEBERT PDX
REV : 2
REV DATE : 3/17
DPN003843
Page :1 /1
Form No.: DPN001040_REV4
Filter Drier
Sight
Glass
SUCTION
LIQUID
COMPRESSOR
EVAPORATOR
COIL
Check
Valve
CONDENSER COIL
LIQUID RETURN
HOT GAS DISCHARGE
Service
Valve
Service
Valve
LEE-TEMP RECEIVER
Service
Valve
Relief Valve
Check Valve
Head Pressure
Control Valve
LIQUID RETURN
Digital Solenoid Valve
Trap at base of risers
over 5ft. (1.5m)
HOT GAS
DISCHARGE
LIEBERT MC CONDENSER
WITH REFRIGERANT RECEIVER
LIEBERT PDX UNIT AND ASSOCIATED PIPING
LIEBERT MC CONDENSER
WITH LEE-TEMP RECEIVER
LIQUID
LIQUID
HOT GAS DISCHARGE
Electronic
Expansion Valve
CONDENSER COIL
Includes factory provided inverted
trap. No external trap required.
Includes factory provided inverted
trap. No external trap required.
RECEIVER
For rises over 25ft. (7.6m),
trap every 20ft. (6m) or
evenly divided
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.
SERVICE/SCHRADER (ACCESS) CONNECTION, WITH VALVE CORE.
FIELD PIPING
REFRIGERANT PIPING
SERVICE/SCHRADER (ACCESS) CONNECTION, NO VALVE CORE.
Isolation Valve
2
2 3
4
4
Isolation Valve
2
2 3
Pressure
Relief
Valve
2
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