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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 (16'). The refrigerant should be charged from the service port on
the outdoor unit's low pressure valve. The additional refrigerant to be charged can be calculated using the following
formula:
ADDITIONAL REFRIGERANT PER PIPE LENGTH
Connective Pipe
Length (m)
Air Purging
Method
Additional Refrigerantl
≤ Standard pipe length
Vacuum Pump
N/A
< Standard pipe length Vacuum Pump
Liquid side: Ø 6,35 (Ø0,25")
R-32:
(Pipe length - standard length) x
12 g/m
Liquid side: Ø 9,52 (Ø0,375")
R-32:
(Pipe length - standard length) x
24g/m
CAUTION
DO NOT
mix refrigerant types.
