Vertiv Liebert CRV - 10 START-UP

10 START-UP
WARNING! Risk of hair, clothing and jewelry entanglement with high speed rotating fan blades.
Can cause equipment damage, serious injury or death. Keep hair, jewelry and loose clothing
secured and away from rotating fan blades during unit operation.
WARNING! Risk of contact with high-speed, rotating fan impeller blades. Can cause injury or
death. Open all local and remote electrical-supply disconnect switches, verify with a voltmeter
that power is off, and verify that all fan impellers have stopped rotating before working in the
unit.
To start the Liebert CRV:
1. Open all valves in the refrigeration circuit according to the instruction label attached to the
valve.
2. Water/Glycol-cooled Models Only: Open all valves in the water circuit according to the
instruction label attached to the valve.
3. Ensure that the refrigerant charge is correct (see Refrigerant Charge Requirements for
Air-cooled Systems on page40).
4. Using a leak detector, verify that there are no refrigerant leaks. If any leaks are detected, repair
them and recharge, depending on your system, as described in ChargingAir-cooled Systems
without LiebertLee-Temp on page44 or Charging Air-cooled Systems withLiebertLee-Temp
Receiver on page49.
5. At least 4 hours before start up, close the main switch and the compressor switch on the
electric panel.
NOTE: The default setting for the Liebert iCOM control is for stand-alone operation. The stand-alone
mode lets you turn on the unit simply by rotating the main switch on the electrical panel. The yellow
LED on the Liebert iCOM will light after the unit is turned on because electrical power is present.
If the LED does not light:
• Check the electrical panel power supply.
• Check the protection devices (for example, thermal switches).
• Check the fuses.
6. Verify that the crankcase heater is working.
7. Check to ensure that there are no water leaks.
8. If an external condenser or drycooler is installed, start it by supplying power to it.
9. Close all MCBs on the electrical panel.
10. Check the supply voltage on all phases.
11. Check the supply voltage on all phases for the external condenser or drycooler, if fitted.
12. Start the unit by pressing the On/Off switch.
13. Check the amp draw of all components (see Electrical Connections on page73).
14. Check the amp draw of the external condenser/drycooler, if fitted.
Vertiv | Liebert CRV Installer/User Guide | 111