Commissioning Overview
Vertiv | Liebert CRD10 | User Manual 68
• Once the commissioning is completed, Vertiv representative will confirm the unit is charged and
operating correctly before the unit is put into operation.
Table 5-2 Commissioning Confirmation Checklist
5.4 Start-up Procedure
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.
5.4.1
First Start-up (or after long standstill)
To prevent compressor damage, the crankcase must be preheated for at least 12 hours before conditioner
start- up. Start the air conditioner as follows:
1. Open all valves in the refrigerant circuit according to the instruction label attached to the valve.
2. Ensure that refrigerant charge is correct.
3. Using a leak detector, verify that there are no refrigerant leakages.
4. At least 12 hours before start-up, the main switch should be closed.
5. Verify the operation of the crankcase heater.
6. Check that there are no water leakages.
7. Ensure that the indoor temperature is higher than 18°C (64.4°F) and there are thermal load exists. If this
situation doesn’t exist, preheat the indoor by using other heating device or heater of the unit manually.
8. Close all MCB’s on the electrical panel.
9. Check the supply voltage on all phases.
10. Ensure that the compressor has been preheated for at least 12 hours before starting the unit.
11. Start the unit by press the ON/OFF button on the Micro-Control for 3s.
12. Press the Enter button again to highlight the input data field in the Password screen, set the target value of
temperature and humidity.
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