Commissioning Overview
Vertiv | Liebert CRD10 | User Manual 66
•
Inspection of auxiliary parts and cables
1. Check if the drainage is normal.
2. Check the electric circuits: Fasten all the electrical connections, and ensure that there is no short circuit &
open circuit and the insulation is good.
3. Check the main power supply voltage of the unit.
5.2.2
Start-up 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 output value to 75% to check the fan
running current.
3. Check the Electric Heating kit: Close the Electric Heating circuit breaker, start the Electric Heating device
manually, check the Electric Heating running current, and close the Electric Heating device after
completion of the operation.
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 is in contact with the fan frame,
and whether the obstacles near the condenser have been cleared away.
5. Run the fan to check if the fan rotates normally and check the input voltage.
6. Charge refrigerant and start-up.
5.3 Refrigerant Charge
The air-cooled unit must be charged on - site with refrigerant, charge the suitable quantity of liquid
refrigerants as indicated on the label. Following are the procedure of charging refrigerant: Depending on the
different connecting conditions, there is a standard charge amount for the air-cooled unit, so be sure to
refer to the calculated charge amount to avoid overcharge.
1.
Charging refrigerant statically: The refrigerant system should be charged quickly with a suitable amount
of liquid refrigerant after vacuuming the system (usually the system pressure can be charged equal to the
tank pressure). Connect the high-low pressure compound pressure gauge to the refrigerant cylinder, air
in the hoses connect to the gauge should be drained-out. Connect the high-low pressure compound
pressure gauge to the schrader valve behind electronic expansion valve and ball valve of the liquid tube,
keep the cylinder handstand at the process of charging statically. Stop charging when the charge amount
is more than the calculated value.
To Next Page
Loading...
Need help?
General
