McQuay MCC 010C/CR, Руководство пользователя, Страница: 58 / 78

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Additional Charge
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The refrigerant gas has already charged into the outdoor unit. For the piping length of 5m. Additional refrigerant
charge after vacuuming is not necessary.
•
When the piping length is more than 5m, please use the table below (unit in gram).
Cooling
MODEL MCC010C MCC015C MCC020C MCC025C MCC030C MCC040C MCC050C MCC060C
7m 30 30 30 76 100 100 100 100
10m 75 75 75 190 250 250 250 250
15m - - 150 380 500 500 500 500
20m - - - - 750 750 750 750
35m - - - - 1500 1500 1500 1500
Heat pump
MODEL MCC010CR MCC015CR MCC020CR MCC025CR MCC030CR MCC040CR MCC050CR MCC060CR
7m 40 40 50 100 100 100 100 100
10m 100 100 125 250 250 250 250 250
15m - - 250 500 500 500 500 500
20m - - - - 750 750 750 750
35m - - - - 1500 1500 1500 1500
Overall Checking
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Ensure the following, in particular :
1) The unit is mounted solidly and rigid in position.
2) Piping and connections are leak proof after charging.
3) Proper wiring has been done.
•
Drainage check - pour some water into drain pan.
•
Test run
1) Conduct a test run after water drainage test and gas leakage test.
2) Watch out for the following :
a) Is the electric plug firmly inserted into the socket?
b) Is there any abnormal sound from unit?
c) Is there any abnormal vibrations with regard to unit itself or piping?
d) Is there smooth drainage of water?
•
Check that :
1) Outdoor fan is running, with warm air blowing off the outdoor unit (cooling cycle).
2) Indoor blower is running and discharge cool air (cooling cycle).
3) Suction (low side) pressure as recommended is before this.
4) The remote controller incorporate a 3 minute delay in there circuit. Thus, it requires about 3
minutes before the outdoor unit can start up.
CAUTION FOR R407C
Do not top-up when servicing leak, as this will reduce the unit performance. Vacuum the unit
thoroughly and then charge the unit with fresh R407C according to the amount recommended
in the specification.
CAUTION FOR R407C
Avoid prolong exposure of an opened compressor, or the internal part of refrigerant piping to moist air.
The POE oil in the compressor and piping can absorb moisture from air.