Liebert DS user manual Liebert

Piping Schematics

Figure 60 Piping schematic—water/glycol with scroll compressor models

For systems with drycoolers,

refer to 12.11.3 - Drycooler Settings.

	LIEBERT		EXPANSION		Optional Dual Pump System shown
CUSTOMER	HEAT REJECTION		TANK**		GLYCOL
HEAT REJECTION					PUMPS
						Check Valves*
	DRYCOOLER			Pressure		(on Dual Pump
						Systems only)
COOLING TOWER	(Glycol)	Aquastat		Port*
						Gate Valves*
AND PUMP
SYSTEM		Sensing
BY OTHERS		Bulbs
		Hose			Air Vents	Pressure Port*
		Bib*	Shutoff Valve*		(typical)***
						Flow Switch
						Supplied with Dual
						Pump Systems
RETURN SUPPLY		Shutoff Valve*				Flow-Regulating
						Valve*
					RETURN	SUPPLY
LIEBERT DS	HOT GAS REHEAT				RETURN	SUPPLY
(and associated piping)

	LIQUID
	Sensing Bulb		EVAPORATOR
		SUCTION	COIL
Service			Hot Gas Reheat
			Valve
Valve
	Service
Check		External	Check Valve
Valve COMPRESSOR Valve
		Equalizer

Optional	Shutoff Valve*
3-Way Regulating	Hose
Valve
	Bib*

2-Way Regulating Valve

Shutoff Valve*

Hose

Bib*

	DISCHARGE
				PARADENSER®	Bypass Valve
				CONDENSER
Expansion	Solenoid	Sight	Filter Dryer
Valve	Valve	Glass			Sensor
			Relief valve(s) supplied	TO SECOND
			with 50Hz EU CE units rated	REFRIGERATION
			maximum 480 PSIG (33 Bar)	CIRCUIT

Factory Piping

Field Piping

Optional Factory 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.

*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

85