31
Ball valve with
service port
Ball valve with
service port
Distributor
Strainer
#100
Receiver
LEV A
LEV B
LEV C
Oil separator
Compressor
High-pressure
switch
Service port
Defrost
thermistor
RT62
Distributor
Muffler
4-way valve
LEV E
Outdoor
heat
exchanger
Indoor unit
C
Unit C gas pipe
temperature thermistor
[
9.52
[
6.35
[
6.35
[
6.35
Indoor unit
B
Unit B gas pipe
temperature thermistor
[
9.52
Indoor unit
A
Indoor unit
A
Indoor unit
B
Indoor unit
C
Unit A gas pipe
temperature thermistor
[
12.7
[
16
[
16
[
16
[
16
[
16
Evaporation
temperature
thermistor
RT63
Capillary tube
[
2.0
✕
[
0.6
✕
750
Capillary tube
[
4.0
✕
[
2.4
✕
400
Capillary tube
[
2.5
✕
[
0.6
✕
1000
[
9.52
[
6
Capillary tube
[
4.0
✕
[
2.8
✕
90
Capillary tube
[
4.0
✕
[
2.8
✕
90
Capillary tube
[
4.0
✕
[
2.8
✕
90
Discharge
temperature
thermistor RT61
Strainer
#100
Strainer
#100
Strainer
#100
R.V. coil
heating ON
cooling OFF
Refrigerant flow in cooling
Refrigerant flow in heating
Outdoor heat
exchanger
temperature
thermistor
RT68
●
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.
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)
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
9.52(3/8)
Liquid
6.35(1/4)
Indoor unit C
Gas
9.52(3/8)
Unit : mm (inch)
Piping length each indoor unit (a, b, c)
25m
Total piping length (a+b+c)
50m
Height difference between units (H)
10m
Bending point for each unit
25
Total bending point
50
❋
It does not matter which unit is higher.
a
b
c
Outdoor
unit
Indoor
units
H
H
H
Refrigerant piping length (one way, 3 unit total)
Calculation : Xg=20g/mx(Refrigerant piping length(m)-40)
Outdoor unit
precharged
50m
200
40m
0
45m
100
3,500
Unit:mm
MXZ-A26WV -
E1
9.52(3/8) or 12.7(1/2)
MAX REFRIGERANT PIPING LENGTH
OB319--2.qxp 03.12.3 0:56 PM Page 31
