(6) ADDITIONAL CHARGE
• 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).
MODEL 7m 10m 15m 20m 35m
20D/20DR 30/50 75/125 150/250 225/375 -
25D/25DR 76/100 190/250 380/500 570/750 -
30D/30DR 100 250 500 750 1500
40D/40DR 100 250 500 750 1500
50D/50DR 100 250 500 750 1500
61C/CR 220 550 1100 1650 3300
Diagram shows typical charging method.
(7) OVERALL CHECKING
•
•
•
•
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 vibration 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 is as per recommendations.
4) The remote controller has incorporated a 3 minutes delay in the circuit. Thus, it requires about 3 minutes before
the outdoor unit can start up.
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.
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