REV : 7
REV DATE : 3/17
DPN002929
Page :1 /1
AIR COOLED MODELS WITH TXV
Form No.: DPN001040_REV4
PIPING SCHEMATIC
LIEBERT PDX
Filter Drier
Sight
Glass
SUCTION
LIQUID
COMPRESSOR
Thermal Expansion
Valve
EVAPORATOR
COIL
Check
Valve
CONDENSER COIL
REFRIGERANT PIPING
FIELD PIPING
For rises over 25ft. (7.6m),
trap every 20ft. (6m) or evenly
divided
SERVICE / SCHRADER (ACCESS) CONNECTION NO VALVE CORE
LIQUID RETURN
HOT GAS DISCHARGE
Sensing
Bulb
External
Equalizer
Service
Valve
Service
Valve
SERVICE / SCHRADER (ACCESS) CONNECTION WITH VALVE CORE
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)
OPTIONAL FIELD
INSTALLED
FUSIBLE PLUG
HOT GAS
DISCHARGE
LIEBERT MC CONDENSER
LIEBERT PDX UNIT AND ASSOCIATED PIPING
LIEBERT MC CONDENSER
WITH LEE-TEMP RECEIVER
LIQUID
LIQUID
HOT GAS DISCHARGE
Solenoid
Valve
CONDENSER COIL
Includes factory provided inverted
trap. No external trap required.
Includes factory provided inverted
trap. No external trap required.
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.
Isolation Valve
Isolation Valve
Pressure
Relief
Valve
2
2
2
3
2
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