Note On Adding Refrigerant - York YKKE Series Installation Manual

Note On Adding Refrigerant

CAUTION
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.
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:
Fixed-frequency R22
(orifice tube in the indoor unit):
Fixed-frequency R22
(orifice tube in the outdoor unit):
Fixed-frequency R410A:
Inverter R410A:
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6.35(1/4")
(Total pipe length - (Total pipe length -
standard pipe length)x standard pipe length)x
30g (0.32oZ)/m(ft) 65g(0.69oZ)/m(ft)
(Total pipe length - (Total pipe length -
standard pipe length) standard pipe length)
x15g(0.16oZ)/m(ft) x30(0.32oZ)/m(ft)
(Total pipe length - (Total pipe length -
standard pipe length) standard pipe length)
x20g(0.21oZ)/m(ft) x40g(0.42oZ)/m(ft)
(Total pipe length - (Total pipe length -
standard pipe length) standard pipe length)
x15g(0.16oZ)/m(ft) x30g(0.32oZ)/m(ft)
Liquid Side Diameter
9.52(3/8")
(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)
x60g(0.64oZ)/m(ft)
12.7(1/2")