Piping Schematics
98
Figure 71 Piping schematic—GLYCOOL semi-hermetic compressor models
LIEBERT
HEAT REJECTION
DRYCOOLER
(Glycol)
Aquastat
Sensing
Bulbs
Hose
Bib*
Shutoff Valve*
EXPANSION
TANK**
Pressure
Port*
Optional Dual Pump System shown
GLYCOL
PUMPS
Check Valves*
(on Dual Pump
Systems only)
Gate Valves*
Air Vents
(typical)***
Pressure Port*
Flow Switch
Supplied with Dual
Pump Systems
Flow-Regulating
Valve*
SUPPLY
SUPPLY
RETURN
RETURN
Shutoff Valve*
Shutoff Valve*
Hose
Bib*
Hose
Bib*
Thermistor
3-Way
Chilled Glycol
Valve
ECON-O-COIL
EVAPORATOR
COIL
LIEBERT DS UNIT
(and associated piping)
Service
Valve
Service
Valve
Cylinder
Unloader(s)
Sensing Bulb
LIQUID
COMPRESSOR
DISCHARGE
Muffler
External
Equalizer
Expansion
Valve
Solenoid
Valve
Sight
Glass
PARADENSER
CONDENSER
TO SECOND
REFRIGERATION
CIRCUIT
3-Way
Regulating
Valve
* Components are not supplied by
Liebert but are recommended for
proper circuit operation and
maintenance
** Field-installed at highest point in
system on return line to pumps
*** Locate at tops of all risers and
any intermediate system high points
Factory Piping
Field Piping
Service/Schrader (Access) Connection No Valve Core
Service/Schrader (Access) Connections With Valve Core
Notes: Schematic representation shown. This schematic does not imply or define elevations and
component location unless specifically noted.
Two refrigeration circuits provided. Single refrigeration circuit shown for clarity
DPN000897
Rev. 02
Shutoff Valve*
SUCTION
Sensor
Relief valve(s) supplied
with 50Hz EU CE units rated
maximum 480 PSIG (33 Bar).
Filter
Dryer
®
For systems with drycoolers,
refer to 13.14.3 - Drycooler Settings.
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