Water-cooled Heat Recovery DC Inverter VRF
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(8) Check whether the pipes for cooling water and chilled water are cleaned, whether impurities
exist in places that connect the cooling tower and the water pool to the outside, and whether
the water quality meets the requirements.
(9) Check whether the pressure gauge and thermometer on the water side are correctly
connected: the pressure gauge should be installed perpendicularly to the water pipe, and
the temperature sensor of the thermometer must be directly inserted into the water pipe.
(10) Inch the cooling water pump and chilled water pump to check the rotation direction of the
water pumps. The water pump shall run clockwise; otherwise, check the water pump wiring
again.
(11) Run the cooling water pump and chilled water pump. Check whether the water pressure is
stable. Observe the inlet and outlet pressure of the water pump, the reading on the pressure
gauge when the water pressure is stable, and the change in difference between inlet and
outlet pressure.
(12) Check whether the auto water replenishment device of the cooling tower/expansion water
tank can ensure smooth water replenishment, and check whether the automatic air
discharge valve is functional. In case of manual air discharge valve, open the air discharge
valves of the cooling water pipe and chilled water pipe to discharge all air in the pipe.
(13) Check and ensure that the cooling tower fan and other devices are functional without
abnormal noises. Check and ensure proper tightness of the fan belt to make sure that the
belt connecting the fan and the motor does not slip during operation and no abnormal noise
is generated.
5.2.2 Trial run
(1) Before commissioning, ensure that the electric compressor of the unit has been preheated
for at least 8 hours. Only after verifying that preheating is normal by touching the
compressor with a hand to confirm, the operator can start the commissioning; otherwise, the
compressor may be damaged. Commissioning must be performed by professional
technicians or under the guidance of professional technicians.
Fig.5.2.1
Summary of Contents for GMV-WQ120WM/A-F
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