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Note On Adding Refrigerant - INVENTOR V5MFI-66 Benutzer- & Installationshandbuch

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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 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:
R22
(ori ce tube in the indoor unit):
R22
(ori ce tube in the outdoor unit):
R410A:
(ori ce tube in the indoor unit):
R410A:
(ori ce tube in the outdoor unit):
R32 :
CAUTION
φ6.35(1/4")
(Total pipe length -
standard pipe length)x
30g (0.32oZ)/m(ft)
(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)
x15g(0.16oZ)/m(ft)
(Total pipe length -
standard pipe length)x
12g(0.13oZ)/m(ft)
mix refrigerant types.
DO NOT
Liquid Side Diameter
φ9.52(3/8")
(Total pipe length -
standard pipe length)x
65g(0.69oZ)/m(ft)
(Total pipe length -
standard pipe length)
x30(0.32oZ)/m(ft)
(Total pipe length -
standard pipe length)
x65g(0.69oZ)/m(ft)
(Total pipe length -
standard pipe length)
x30g(0.32oZ)/m(ft)
(Total pipe length -
standard pipe length)x
24g(0.26oZ)/m(ft)
φ12.7(1/2")
(Total pipe length -
standard pipe length)x
115g(1.23oZ)/m(ft)
(Total pipe length -
standard pipe length)
x60g(0.64oZ)/m(ft)
(Total pipe length -
standard pipe length)
x115g(1.23oZ)/m(ft)
(Total pipe length -
standard pipe length)
x65g(0.69oZ)/m(ft)
(Total pipe length -
standard pipe length)x
40g(0.42oZ)/m(ft)
Page 37

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