York YKKE Series, Installation Manual

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Page 22
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Air Evacuation
Note On Adding Refrigerant
CAUTION
s Refrigerant charging must be performed after wiring, vacuuming and the leak test.
s DO NOT exceed the maximum allowable quantity of refrigerant or overcharge the system. Doing so can damage
or impact the unit’s function.
s Charging with unsuitable substances may cause explosions or accidents. Ensure that the appropriate refrigerant is
used.
s Refrigerant containers must be opened slowly. Always use protective gear when charging the system.
s 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:
Liquid Side Diameter
ʔ 6.35(1/4”) ʔ 9.52(3/8”) ʔ 12.7(1/2”)
Fixed-frequency R22
(orifice tube in the indoor unit):
(Total pipe length -
standard pipe length)x
30g (0.32oZ)/m(ft) (Total pipe length -
standard pipe length)x
65g(0.69oZ)/m(ft) (Total pipe length -
standard pipe length)x
115g(1.23oZ)/m(ft)
Fixed-frequency R22
(orifice tube in the outdoor unit):
(Total pipe length -
standard pipe length)
x15g(0.16oZ)/m(ft) (Total pipe length -
standard pipe length)
x30(0.32oZ)/m(ft) (Total pipe length -
standard pipe length)
x60g(0.64oZ)/m(ft)
Fixed-frequency R410A:
(Total pipe length -
standard pipe length)
x20g(0.21oZ)/m(ft) (Total pipe length -
standard pipe length)
x40g(0.42oZ)/m(ft) (Total pipe length -
standard pipe length)
x60g(0.64oZ)/m(ft)
Inverter R410A:
(Total pipe length -
standard pipe length)
x15g(0.16oZ)/m(ft) (Total pipe length -
standard pipe length)
x30g(0.32oZ)/m(ft)