Startup; Initial Startup - Emerson Liebert CRV User Manual

10.0 S
TARTUP
10.1

Initial Startup

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 rotating fan blades. Can cause injury or death.
The Liebert CRV's fan blades will continue rotating after the unit is shut Off. Open all local
and remote electric power supply disconnect switches, verify with a voltmeter that power is
off and verify that the fan blades have stopped rotating before working on 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. W 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 6.0 Refrigerant Connections for Air-Cooled
Units).
4. Using a leak detector, verify that there are no refrigerant leaks. If any leaks are detected, repair
them and recharge as described in 6.0 Refrigerant Connections for Air-Cooled Units.
5. At least 4 hours before startup, close the main switch and the compressor switch on the electric
panel.
NOTE
The default setting for the Liebert iCOM
mode allows users to 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 (e.g., 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 MCB's 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 9.0 Electrical Connections).
14. Check the amp draw of the external condenser/drycooler, if fitted.
15. If the compressor makes a loud, unusual noise, invert the electrical connections of the phases
supplying the corresponding digital scroll compressor, which accepts only one direction of
rotation.
16. Ensure that the fans rotate in the correct direction (see arrow on fan).
17. Ensure that all control system settings are correct and that there are no alarms (see Liebert CRV
system screen, Figure 56).
18. W Models Only: Verify the water flow is adequate.
19. W Models Only: For closed circuit units, ensure that the water pump starts when the
compressor starts.
control is for stand-alone operation. The stand-alone
®
73

Startup

® ™
Liebert CRV