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Piping Schematics
84
Figure 59 Piping schematic—water/glycol, semi-hermetic compressor models
Compressor
Muffler
Service
Valve
Cylinder
Unloader(s)
Evaporator
Coil
Note: 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.
Solenoid
Valve
Expansion
Valve
Relief valve(s)
supplied with 50Hz
EU CE units rated
maximum 480 PSIG
(33 Bar).
Paradenser®
Condenser
Customer Heat Rejection
Liebert
Heat Rejection
Drycooler
(Glycol )
Glycol Pumps
Bypass Valve
Expansion
Tank**
Hot Gas Reheat
Hose Bib *
Hose
Bib *
Shutoff Valve *
Shutoff Valve *
Pressure Port *
Pressure
Port *
Shutoff Valve *
Hose
Bib *
Air Vents
(typical) ***
Shutoff Valve *
Sensor
Aquastat
Sensing
Bulb
Check Valves *
(on Dual Pump
Systems only)
Flow Switch
Supplied with Dual
Pump Systems
Flow-Regulating
Valve
Supply
Return
Return Supply
Liquid
Suction
2-Way
Regulating
Valve
Optional
3-Way
Regulating
Valve
Check Valve
Hot Gas Reheat
Valve
Discharge
Liebert DS Unit
(and associated piping)
To Second
Refrigeration
Circuit
Service/Schrader (Access) Connection No Valve Core
Service/Schrader (Access) Connection With Valve Core
Factory Piping
Field Piping
Optional Factory Piping
Service
Valve
External
Equalizer
Sensing
Bulb
Optional Dual Pump System Shown
Gate Valves *
Filter
Dryer
Sight
Glass
Cooling Tower
and Pump
System by
Others
Return Supply
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
*
**
***
DPN00895
Rev. 2
For systems with drycoolers,
refer to 12.11.3 - Drycooler Settings.