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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. For example, in North America, the standard pipe length is
7.5m (25’) In other areas, the standard pipe length is 5m (16‘). The additional refrigerant to be
charged can be calculated using the following formula:
Liquid Side Diameter
φ6.35(1/4”)
φ9.52(3/8”)
φ12.7(1/2”)
R410A:
(orifice tube in the indoor unit):
(Total pipe length -
standard pipe length)
x30g(0.32oZ)/m(ft)
(Total pipe length -
standard pipe length)
x65g(0.69oZ)/m(ft)
(Total pipe length -
standard pipe length)
x115g(1.23oZ)/m(ft)
R410A:
(orifice tube in the outdoor unit):
(Total pipe length -
standard pipe length)
x15g(0.16oZ)/m(ft)
(Total pipe length -
standard pipe length)
x30g(0.32oZ)/m(ft)
(Total pipe length -
standard pipe length)
x65g(0.69oZ)/m(ft)
R32:
(Total pipe length -
standard pipe length)x
12g(0.13oZ)/m(ft)
(Total pipe length -
standard pipe length)x
24g(0.26oZ)/m(ft)
(Total pipe length -
standard pipe length)x
40g(0.42oZ)/m(ft)
•
Refrigerant charging must be performed after wiring, vacuuming and the leak test.
•
DO NOT
exceed the maximum allowable quantity of refrigerant or overcharge the system.
Doing so can damage or impact the
unit’s
function.
•
Charging with unsuitable substances may cause explosions or accidents. Ensure that the
appropriate refrigerant is used.
•
Refrigerant containers must be opened slowly. Always use protective gear when charging the
system.
•
DO NOT
mix refrigerants types.
•
For the R32 refrigerant model, make sure the conditions within the area have been made safe
by control of flammable material when the refrigerant added into air conditioner.
•
The maximum refrigerant charge amount of R32 is 305 grams.
CAUTION
Ai
r E
va
cu
at
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Summary of Contents for KCIS-52 DR11
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