20
(5) Additional Charge
• The refrigerant charge has already charged into the outdoor unit. For the piping length of 7.6m, additional
refrigerant charge after vacuuming is not necessary.
• For AMC 75/100D/ER, please refer to the table below:
Liquid Pipe Size, inch Additional Charge, kg/meter
1/2” 0.10
5/8” 0.17
The additional refrigerant charge amount recommended is a guideline for longer piping application. The
actual charge required may be different from the guideline due to different application and variation in site
conditions.
Diagram shows typical charging method:
Note: R407C-Fixlterdryer
R22-Nil
R410A-Nil
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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