3.5
The Liebert
Liebert Lee-Temp Piping
A discharge line and a liquid line must be
Liebert Lee-Temp Controlled Materials Supplied
•
•
•Piping access cover to be reinstalled when piping is complete (models with one to four fans only)
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•Terminal block for
•Condenser
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•Insulated storage receiver
•Head pressure control valve with integral check valve
•Service valve
•Pressure relief valve
•Liquid level sight glass
•Check valve
NOTE
Lee-Temp Leak Check and Evacuation Procedure
Proper leak check and evacuation can be accomplished only with all system solenoid valves open and check valves accounted for.
NOTE
Systems with scroll or digital scroll compressors include a
1.If unit power is available, open the unit liquid line solenoid valves using the evacuation function in the diagnostic section of the Liebert iCOM control. If unit power is not available, a field- supplied 24VAC / 75VA power source must be directly connected to each of the unit solenoid valves.
2.Attach a jumper hose from the service valve fitting on the outlet of the receiver and the Schrader fitting on the discharge header of the condenser.
3.For scroll and digital scroll compressors, connect refrigerant gauges to the suction rotalock valves and discharge line Schrader valves (see Note above).
4.Open the service valves and place a 150 PSIG (1034 kPa) of dry nitrogen with a tracer of refrigerant. Check system for leaks with a suitable leak detector.
5.After completion of leak testing, release the test pressure (per local code) and pull an initial deep vacuum on the system with a suitable pump.
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