Mitsubishi Electric MSZ-FD VA Series Service Manual page 14

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE
MUZ-FD25
MUZ-FD35
MUZ-FD50
ADDITIONAL REFRIGERANT CHARGE (R410A: g)
Outdoor unit
Model
precharged
MUZ-FD25
MUZ-FD35
Outdoor unit
Model
precharged
MUZ-FD50 1,550
NOTE: Refrigerant piping exceeding 7 m requires additional refrigerant charge according to the calculation.
Refrigerant piping: m
Max. Length
A
20
30
Indoor
unit
Max. Height
difference
B
Max. Length
5 m 6 m
0 0
1,150
7 m
0
Max. Height difference
B
12
15
A
Outdoor unit
Refrigerant piping length (one way)
7 m 8 m 9 m 10 m
0 90 120 150
Calculation: X g = 30 g/m × (Refrigerant piping length (m) - 5)
Refrigerant piping length (one way)
10 m 15 m
90 240
Calculation: X g = 30 g/m × (Refrigerant piping length (m) – 7)
14
Piping size O.D: mm
Gas
9.52
12.7
11 m 12 m 13 m 14 m 15 m 20 m
180 210 240 270
20 m 25 m
390 540
Liquid
6.35
300 450
30 m
690