Mitsubishi Electric M Series Manual page 508

MULTI SYSTEM Inverter Heat Pump
MXZ-2B52VA
MAX REFRIGERANT PIPING LENGTH
Piping length each indoor unit (a, b)
Total piping length (a+b)
Bending point for each unit
Total bending point
It is irrelevant which unit is higher.
ADDITIONAL REFRIGERANT CHARGE
Outdoor unit
Refrigerant piping length (one way, 2 unit total)
precharged
(g)
1,300
Calculation : Xg = 20 g/m x (Refrigerant piping length(m) - 20)
Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes, refer to the
tables below.
Indoor unit
class Pipe diameter
Liquid
15/20/22/25/35/42
Gas
MXZ-3B54VA MXZ-3B68VA
MAX REFRIGERANT PIPING LENGTH
Piping length each indoor unit (a, b, c)
Total piping length (a+b+c)
Bending point for each unit
Total bending point
It is irrelevant which unit is higher.
ADDITIONAL REFRIGERANT CHARGE
Outdoor unit
Refrigerant piping length (one way, 3 unit total)
precharged
40m
(g)
2,700
0
Calculation : Xg = 20 g/m x (Refrigerant piping length (m) - 40)
Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes, refer to the
tables below.
When diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe.
For further information on Different-diameter pipe.
Indoor unit
class Pipe diameter
Liquid
15/20/22/25/35/42
Gas
Liquid
50
Gas
60
Liquid
Gas
(MXZ-3B68VA)
C-506
20m 30m
0 200
Extension pipe diameter
6.35(1/4) Liquid
9.52(3/8) Gas
50m
200
Extension pipe diameter
6.35(1/4) Liquid
9.52(3/8) Gas
6.35(1/4) Liquid
12.7(1/2) Gas
6.35(1/4) Liquid
15.88(5/8) Gas
Indoor
a
units
20m
30m
20
30
b
6.35(1/4)
Indoor unit A
9.52(3/8)
Indoor unit B
Indoor
units
25m
50m
25
50
6.35(1/4)
Indoor unit A
9.52(3/8)
6.35(1/4)
Indoor unit B
12.7(1/2)
6.35(1/4)
Indoor unit C
15.88(5/8)
Outdoor
unit
UNIT: mm (inch)
Outdoor unit union diameter
For
Liquid
Gas
Liquid
Gas
a
b
Outdoor
unit
c
UNIT: mm (inch)
Outdoor unit union diameter
For
Liquid
Gas
Liquid
Gas
Liquid
Gas
M series
15m
15m
10m
6.35(1/4)
9.52(3/8)
6.35(1/4)
9.52(3/8)
Max.
Height
difference
15m
15m
10m
6.35(1/4)
9.52(3/8)
6.35(1/4)
9.52(3/8)
6.35(1/4)
9.52(3/8)