Vertiv Liebert CRV Plus - Startup Inspection

Vertiv | Liebert CRV+ | User Manual 46
2.5.3 Startup Inspection
1. Open the corresponding circuit breaker of each component of the unit, close the general circuit
breaker and the transformer circuit breaker, and check the control voltage;
2. Check the indoor fan:
 Close the fan circuit breaker; manually set the 75% output to check the fan running current.
3. Check the Electric Heating kit:
 Close the Electric Heating circuit breaker, manually start the Electric Heating device, check the
Electric Heating running current, and close the Electric Heating device after the operations are
done.
4. Check the air cooled condenser:
 Check if the condenser is installed correctly, including whether the wiring is correct, whether the
fan is reliably fixed, and whether the fan blades scratch the fan frame, and whether the alien
objects near the condenser have been cleared away.
 Run the fan to check if the fan rotates normally and check the input voltage.
5. Charge refrigerant and startup:
 The air cooled unit needs to be charged with refrigerant on site, charge the suitable amount of
liquid refrigerants according to the indications on the label;
After charging the refrigerants, do not turn on the compressor and charge the refrigerant dynamically
until the crank case heating device has been pre-heated for longer than 12h. For dynamic filling of the
refrigerants, the charging speed should not be high in order to avoid the compressor damage;
There is a standard charging amount (see User Manual) for each air cooled unit according to
the different connecting conditions, so be sure to refer to the calculated charging amount to
avoid over charge.
 Manually set the 75% output for the fan, start the compressor after 5min -> adj
ust the compressor
output -> slowly charge the refrigerant to the location indicated by the label on the low pressure
side.
In the meantime, check the operating current and voltage of the condenser.
Requirements: When the compressor runs at 100%, ensure the 25-40℃ discharge superh
should be no bubbles in the sight glass, and the reference condensate depression is 3-5
pressure is 8-10kg, discharge pressure is 21-23kg, and the superheat is more than 12
℃. The
suction
℃. For the low
temperature liquid storage system, be sure to operate according to relevant instruction files.