Note On Adding Refrigerant - Airwell CDMX-035N-09M25 User & Installation Manual

Note on Adding Refrigerant

Some systems require additional charging depending on pipe lengths. The standard pipe length varies
according to local regulations. For example, in North America, the standard pipe length is 7.5m (25').
In other areas, 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:
R32 :
CAUTION
DO NOT
φ6.35(1/4")
(Total pipe length -
standard pipe length)x
12g(0.13oZ)/m(ft)
mix refrigerant types.
Liquid Side Diameter
φ9.52(3/8") φ12.7(1/2")
(Total pipe length - (Total pipe length -
standard pipe length)x standard pipe length)x
24g(0.26oZ)/m(ft) 40g(0.42oZ)/m(ft)
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