Liebert Precision Cooling System DS - Manual (Page 98)

Piping Schematics
88
Figure 63 Piping schematic—water/glycol with digital scroll compressor models
Sensing Bulb
CUSTOMER
HEAT REJECTION
LIEBERT
HEAT REJECTION
LIEBERT DS UNIT
(and associated piping)
COOLING TOWER
AND PUMP
SYSTEM
BY OTHERS
RETURN SUPPLY
EXPANSION
TANK**
DRYCOOLER
(Glycol)
GLYCOL
PUMPS
Optional Dual Pump System shown
Check Valves*
(on Dual Pump
Systems only)
Gate Valves*
Pressure Port*
Flow Switch
Supplied with Dual
Pump Systems
Flow-Regulating
Valve*
Aquastat
Sensing
Bulbs
Hose
Bib*
Shut-Off Valve*
Shut-Off Valve*
Pressure
Port*
Air Vents
(typical)***
RETURN SUPPLY
HOT GAS REHEAT
LIQUID
28-42kW Digital Solenoid Valve
53-70kW Digital
Solenoid Valve
Service
Valve
Check
Valve COMPRESSOR
DISCHARGE
Service
Valve
SUCTION
EVAPORATOR
COIL
PARADENSER ®
CONDENSER
External
Equalizer
Hot Gas Reheat
Valve
Check Valve
Expansion
Valve Solenoid
Valve Sight
Glass Filter Drier
Relief valve(s) supplied
with 50 Hz EU CE units rated
maximum 480 PSIG (33 Bar).
Pressure
Transducer
NOTE: TWO REFRIGERATION CIRCUITS PROVIDED
SINGLE REFRIGERATION CIRCUIT SHOWN FOR CLARITY.
TO SECOND
REFRIGERATION
CIRCUIT
Optional 3-Way
Motorized Ball
Valve
Shut-Off Valve* Shut-Off Valve*
Hose
Bib* Hose
Bib*
2-Way
Motorized
Ball Valve
From
iCOM
Control
To
iCOM
Control
RETURN SUPPLY
FACTORY PIPING
FIELD PIPING
OPTIONAL FACTORY PIPING
SERVICE / SCHRADER (ACCESS) CONNECTION NO VALVE CORE
SERVICE / SCHRADER (ACCESS) CONNECTION WITH VALVE CORE
NOTE: SCHEMATIC REPRESENTATION SHOWN. THIS SCHEMATIC DOES NOT IMPLY OR DEFINE ELEVATIONS AND
COMPONENT LOCATION, UNLESS SPECIFICALLY NOTED.
* 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
DPN001430
Rev. 0