Engineering Manual

A-130
7-3.4 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-FH06NA
MUZ-FH06NAH
MUZ-FH09NA
MUZ-FH09NAH
2 lb. 9 oz. 0 1.08 3.24 5.40 7.56 8.64
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
MUZ-FH12NA
MUZ-FH12NAH
2 lb. 9 oz. 0 1.62 4.86 8.10 11.34 12.96
MUZ-FE09NAH
MUZ-FE12NAH
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-FH15NA
MUZ-FH15NAH
MUZ-FH18NA2
MUZ-FH18NAH2
3 lb. 7 oz. 0 1.08 3.24 5.40 7.56 9.72 11.88 14.04 16.20
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
MUFZ-KJ09NAHZ
MUFZ-KJ12NAHZ
2 lb. 10 oz. 0 1.08 3.24 5.40 7.56 8.64
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 70 80 90 100
MUFZ-KJ15NAHZ
MUFZ-KJ18NAHZ
3 lb. 5 oz. 0 1.62 4.86 8.10 11.34 14.58 17.82 21.06 24.30
Calculation: X oz. = 1.62/5 oz./ft. × (Refrigerant piping length (ft.) - 25)