Home HME030363N - Note on Adding Refrigerant; Additional Refrigerant Per Pipe Length

41
Air Evacuation
ADDITIONAL REFRIGERANT PER PIPE LENGTH
Connective Pipe
Length (m)
Air Purging
Method
Additional Refrigerant

length
Vacuum
Pump
N/A
> Standard pipe
length
Vacuum
Pump

(Pipe length – standard length) × 15g/m
(Pipe length – standard length) × 0.16oZ/ft

(Pipe length – standard length) × 30g/m
(Pipe length – standard length) × 0.32oZ/ft
WARNING
DO NOT mix refrigerant types.
OPEN VALVE STEMS GENTLY
When opening valve stems, turn the hexagonal wrench until it hits against the stopper. Do not try to
force the valve to open further.
Note on Adding Refrigerant
Some systems require additional charging depending on their pipe lengths. The standard pipe
length in North America is 25ft. 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
