Engineering Manual

A-128
7-2.4 Additional refrigerant charge (R410A: oz.)
NOTE: Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.
Model
Outdoor unit
precharged
Refrigerant piping length (one way): ft.
25 30 40 50 60 65
MUZ-HM09NA
MUZ-HM12NA
-
U1
1 lb. 12 oz.
0 1.08 3.24 5.40 7.56 8.64
MUZ-GL09NA
-
U1
MUZ-GL09NAH
-
U1
2 lb. 5 oz.
MUZ-GL09NA
-
U8
MUZ-GL09NAH
-
U8
MUY-GL09NA
MUZ-GL12NA
MUZ-GL12NAH
MUY-GL12NA
2 lb. 9 oz.
MUZ-HM12NA
-
U8
MUZ-GL15NA
MUZ-GL15NAH
MUZ-HM15NA2
MUY-GL15NA
MUZ-HM18NA2 2 lb. 10 oz.
Calculation: X oz. = 1.08/5 oz./ft. × (Refrigerant piping length (ft.) - 25)
NOTE: Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.
Model
Outdoor unit
precharged
Refrigerant piping length (one way): ft.
25 30 40 50 60 65
SUZ-KA09NA 1 lb. 16 oz.
0 1.62 4.86 8.10 11.34 12.96
SUZ-KA12NA
SUZ-KA15NA
2 lb. 9 oz.
Calculation: X oz. = 1.62/5 oz./ft. × (Refrigerant piping length (ft.) - 25)
NOTE: Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.
Model
Outdoor unit
precharged
Refrigerant piping length (one way): ft.
25 30 40 50 60 70 80 90 100
MUZ-GL18NA
MUZ-GL18NAH
MUY-GL18NA
3 lb. 9 oz.
0 1.08 3.24 5.40 7.56 9.72 11.88 14.04 16.20
MUZ-HM24NA
MUY-D30NA
MUY-D36NA
4 lb.
SUZ-KA18NA 3 lb. 16 oz.
Calculation: X oz. = 1.08/5 oz./ft. × (Refrigerant piping length (ft.) - 25)
NOTE: Refrigerant piping exceeding 33 ft. requires additional refrigerant charge according to the calculation.
Model
Outdoor unit
precharged
Refrigerant piping length (one way): ft.
33 40 50 60 70 80 90 100
MUZ-GL24NA
MUZ-GL24NAH
MUY-GL24NA
4 lb. 3 oz. 0 4.14 10.06 15.98 21.90 27.82 33.74 39.66
Calculation: X oz. = 2.96/5 oz. / ft. × (Refrigerant piping length (ft.) - 33)
NOTE: Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation.
Model
Outdoor unit
precharged
Refrigerant piping length (one way): ft.
25 30 40 50 60 70 80 90 100
MUZ-D30NA
MUZ-D36NA
4 lb. 10 oz. 0 2.96 8.88 14.80 20.72 26.64 32.56 38.48 44.40
Calculation: X oz. = 2.96/5 oz./ft. × (Refrigerant piping length (ft.) - 25)