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Note on Adding Refrigerant
Some systems require additional charging depending on pipe lengths. The standard pipe length varies
according to local regulations.
The standard pipe length is 5m. The refrigerant should be charged from the service port on the outdoor
port unit's low pressure valve. The additional refrigerant to be charged can be calculated using the following
formula:
ADDITIONAL REFRIGERANT (R32) PER PIPE LENGTH
Connective Pipe
Air Purging
Additional Refrigerant
Length (m)
Method
< Standard pipe length Vacuum Pump
N/A
Liquid Side: Ø 6.35 (1/4")
Liquid Side: Ø 9.52 (3/8")
> Standard pipe lengh Vacuum Pump
(Pipe length – standard length) x 12g/m
(Pipe length – standard length) x 24g/m
CAUTION
mix refrigerant types.
DO NOT
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