User manual

Piping Schematics
99 Liebert
®
DS
™
Figure 71 Piping schematic—water/glycol with scroll compressor models
COMPRESSOR
CUSTOMER
HEAT REJECTION
COOLING TOWER
AND PUMP
SYSTEM
BY OTHERS
RETURN
SUPPLY
LIEBERT
HEAT REJECTION
DRYCOOLER
(Glycol)
Aquastat
Sensing
Bulbs
EXPANSION
TANK**
Hose
Bib*
Shutoff Valve*
Pressure
Port*
Optional Dual Pump System shown
RETURN
RETURN
SUPPLY
SUPPLY
Air Vents
(typical)***
Hose
Bib*
Hose
Bib*
Optional
3-Way Regulating
Valve
2-Way
Regulating
Valve
Bypass Valve
PARADENSER
CONDENSER
EVAPORATOR
COIL
Sensing Bulb
Service
Valve
External
Equalizer
Service
Valve
Check
Valve
DISCHARGE
LIEBERT DS
(and associated piping)
LIQUID
SUCTION
Expansion
Valve
Solenoid
Valve
Sight
Glass
Filter Dryer
Relief valve(s) supplied
with 50Hz EU CE units rated
maximum 480 PSIG (33 Bar)
TO SECOND
REFRIGERATION
CIRCUIT
Sensor
Optional Factory Piping
* 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
DPN000896
REV 3
Check Valves*
(on Dual Pump
Systems only)
Gate Valves*
Pressure Port*
Flow Switch
Supplied with Dual
Pump Systems
Flow-Regulating
Valve*
GLYCOL
PUMPS
Shutoff Valve*
Shutoff Valve*
Shutoff Valve*
Factory Piping
Field Piping
Service/Schrader (Access) Connection No Valve Core
Service/Schrader (Access) Connections With Valve Core
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.
®
For systems with drycoolers,
refer to 13.14.3 - Drycooler Settings.