Note On Adding Refrigerant - Midea MFYA400-24HRFN8-QRD0W User Manual

Note On Adding Refrigerant

CAUTION
DO NOT mix refrigerant types.
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
(orifice tube in the indoor unit):
R22
(orifice tube in the outdoor unit):
R410A:
(orifice tube in the indoor unit):
R410A:
(orifice tube in the outdoor unit):
R32 :
(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)
26
(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)
(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)