Startup
Liebert
®
CRV
™
74
Checks to Perform after Startup
Once the system is operating under load, check the various components, as follows:
1. Verify that the fans are operating properly.
2. Ensure that the temperature and relative humidity are being controlled, and that the humidifier
(optional) and heating steps (optional) operate when required.
3. Ensure that the compressor operates when required.
4. Ensure that the fan operation controller on the external condenser/drycooler (if fitted) is
calibrated correctly, and that it controls the fan operation.
5. Record all of the following on the warranty inspection form:
a. All component voltages and current draws
b. All air / water temperatures indoor and outdoor
c. All refrigerant and water / glycol pressures,
d. All levels of refrigerant and oil in sight glasses
e. Record refrigerant pressure switch settings and operating pressures
f. Record superheat and sub-cooling.
10.2 Automatic Restart
The Liebert CRV may be set up through the Liebert iCOM to automatically restart on the return of
power after a supply power interruption.
To avoid an automatic cold restart of the compressor if a power interruption of several hours is
expected, stop the unit before the blackout. After power returns, allow the compressor to preheat
before restarting the unit.
Figure 47 Refrigerant line components—600mm (24") models
Liquid Receiver
Relief Valve
Filter
Dryer
Inlet
Schrader
Valve
Filter
Dryer
Sight Glass
Solenoid Valve
Thermostatic
expansion
valve
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