32
Unit:mm
●
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,see page BACK COVER.
Outdoor unit union diameter
For
Liquid
6.35(1/4)
Indoor unit A
Gas
12.7(1/2)
Liquid
6.35(1/4)
Indoor unit B
Gas
12.7(1/2)
Liquid
6.35(1/4)
Indoor unit C
Gas
9.52(3/8)
Liquid
6.35(1/4)
Indoor unit D
Gas
9.52(3/8)
Unit : mm (inch)
Piping length each indoor unit (a, b, c, d)
25m
Total piping length (a+b+c+d)
70m
Height difference between units (H)
10m
Bending point for each unit
25
Total bending point
70
❋
It does not matter which unit is higher.
a
b
c
d
Outdoor
unit
Indoor
units
H
H
H
Refrigerant piping length (one way, 4 unit total)
Calculation : Xg=20g/mx(Refrigerant piping length(m)-40)
Outdoor unit
precharged
60m
400
40m
0
50m
200
3,500
70m
600
MXZ-A32WV -
E1
Indoor unit
Extension pipe diameter
class
Pipe diameter
Liquid
6.35(1/4)
Liquid
6.35(1/4)
07/09
Gas
9.52(3/8)
Gas
9.52(3/8)
Liquid
6.35(1/4)
Liquid
6.35(1/4)
12
Gas
Gas
12.7(1/2)
Liquid
6.35(1/4)
Liquid
6.35(1/4)
18
Gas
12.7(1/2)
Gas
12.7(1/2)
Liquid
6.35(1/4)
Liquid
6.35(1/4)
24
Gas
15.88(5/8)
Gas
15.88(5/8)
Liquid
9.52(3/8)
Liquid
9.52(3/8)
26
Gas
15.88(5/8)
Gas
15.88(5/8)
9.52(3/8) or 12.7(1/2)
Indoor unit
D
Ball valve with
service port
Ball valve with
service port
Distributor
Receiver
LEV A
LEV B
LEV C
LEV D
Oil separator
Compressor
High-pressure
switch
Service port
Distributor
Muffler
4-way valve
LEV E
Outdoor
heat
exchanger
Unit D gas pipe
temperature thermistor
[
9.52
Indoor unit
C
Unit C gas pipe
temperature thermistor
[
9.52
[
6.35
[
6.35
[
6.35
[
6.35
Indoor unit
B
Unit B gas pipe
temperature thermistor
[
12.7
Indoor unit
A
Indoor unit
A
Indoor unit
B
Indoor unit
C
Indoor unit
D
Unit A gas pipe
temperature thermistor
[
12.7
[
16
[
16
[
16
[
16
[
16
Capillary tube
[
4.0
✕
[
2.4
✕
400
Capillary tube
[
2.5
✕
[
0.6
✕
1000
[
9.52
[
6
Capillary tube
[
4.0
✕
[
2.8
✕
90
Discharge
temperature
thermistor RT61
Strainer
#100
Capillary tube
[
2.0
✕
[
0.6
✕
750
Strainer
#100
Strainer
#100
Strainer
#100
Strainer
#100
R.V. coil
heating ON
cooling OFF
Refrigerant flow in cooling
Refrigerant flow in heating
Defrost
thermistor
RT62
Evaporation
temperature
thermistor
RT63
Outdoor heat
exchanger
temperature
thermistor
RT68
MAX REFRIGERANT PIPING LENGTH
OB319--2.qxp 03.12.3 0:56 PM Page 32
