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and without any air. Also make sure there is good insulation for the water
pipe.
(3) Check the electrical wiring. Make sure that the power voltage is normal,
the screws are fastened, the wiring is made in line with the diagram, and
the earthing is connected.
(4) Check the heat pump unit including all of the screws and parts of the heat
pump to see if they are in good order. When the power is on, review the
indicator on the controller to see if there is any failure indication. The gas
gauge can be connected to the check valves to see the high pressure (or
low pressure) of the system during trial running.
6.9.2. Trial running
(1) Start the heat pump by press "
" key on the controller. Check
whether the water pump is running, if it runs normally there will be 0.2
MPa on the water pressure meter.
(2) When the water pump runs for 1 minutes, the compressor will start.
Hear whether there is strange sound from the compressor. If abnormal
sound occurs please stop the unit and check the compressor. If the
compressor runs well please look for the pressure meter of the
refrigerant.
(3) Then check whether the power input and running current is in line with
the manual. If not please stop and check.
(4) Adjust the valves on the water loop, to make sure that the hot(cool)
water supply to each door is good and meet the requirement of heating
(or cooling). Review whether the outlet water temperature is stable.
(5)
The parameters of the controller are set by the factory, it is not allowed
to change then by the user himself.
If the water flow rate is lower than 70% of the rated water flow, the
defrosting efficiency will be lower. The suggested water flow rate shall be
the rated flow rate which is shown on the nameplate.
