Daikin Centrifugal Compressor Water Chiller HSC087

1) Re-sample after 500 hours of unit operation.

a) If content increases less than 10%, change oil and oil filter and re-sample at normal interval (usually annual).

b) If content increases between 11% and 24%, change oil and oil filter and re-sample after an additional 500 hours of operation.

c) If content increases more than 25%, inspect compressor for cause.

2) Re-sample after 500 hours of unit operation.

a) If content increases less than 10%, change filter-drier and re-sample at normal interval (usually annual).

b) If content increases between 11% and 24%, change filter-drier and re-sample after an additional 500 hours of operation.

c) If content increases more than 25%, monitor for a water leak.

Warning: Only trained personnel should perform this procedure.

If the system is not operational, report the issue to the maintenance team and stop the procedure.

Is there any oil leak in the system?

If there is an oil leak, repair work is necessary.

Enter the amount of oil added to the system.

Upload a photo of the hand pump connected to the backseat port of the valve.

Is the compressor oil exposed to moisture?

If the compressor oil is exposed to moisture, take necessary precautions.

Warning: Only fully qualified technicians must attempt service.

Power factory correction capacitors disconnected?

Terminal Check (Infrared temperature measurement)

Motor Cooling Filter Drier Pressure Drop

Enter the pressure drop reading

Examine Contactors (hardware and operation)

Verify Overload Setting and Trip

Test Electrical Connections (Infrared temp measurement)

Sign off on the air compressor starter maintenance

WSC and WDC water chillers are leak tested at the factory and shipped with the correct charge of refrigerant as indicated on the unit nameplate.

In the event the refrigerant charge was lost due to shipping damage, the system should be charged as follows after first repairing the leaks and evacuating the system.

Connect the refrigerant drum to the gauge port on the liquid line shutoff valve and purge the charging line between the refrigerant cylinder and the valve. Then open the valve to the mid-position.

Turn on both the cooling tower water pump and chilled water pump and allow water to circulate through the condenser and the chiller. (It will be necessary to manually close the condenser pump starter.)

If the system is under a vacuum, stand the refrigerant drum with the connection up, and open the drum and break the vacuum with refrigerant gas to a saturated pressure above freezing.

With a system gas pressure higher than the equivalent of a freezing temperature, invert the charging cylinder and elevate the drum above the condenser. With the drum in this position, valves open, water pumps operating, liquid refrigerant will flow into the condenser. Approximately 75% of the total requirement estimated for the unit can be charged in this manner.

After 75% of the required charge has entered the condenser, reconnect the refrigerant drum and charging line to the service valve on the bottom of the evaporator. Again purge the connecting line, stand the drum with the connection up, and place the service valve in the open position.

IMPORTANT: At this point, the charging procedure should be interrupted and prestart checks made before attempting to complete refrigerant charge. The compressor must not be started at this time. (Preliminary check must first be completed.)

NOTE: It is of utmost importance that all local, national, and international regulations concerning the handling and emission of refrigerants are observed.