35
Indoor unit
Extension pipe diameter
class
Pipe diameter
Liquid
6.35(1/4)
Liquid
6.35(1/4)
22/25/35
Gas
9.52(3/8)
Gas
9.52(3/8)
REFRIGERANT SYSTEM DIAGRAM
9
Stop valve
(with strainer #100)
LEV A
LEV B
Compressor
Defrost
thermistor
RT61
Distributor
Muffler
4-way valve
Indoor unit
B
[
9.52
[
6
[
6
Indoor unit
A
Indoor unit
A
Indoor unit
B
[
9.52
[
12
[
12
[
12
[
12
Capillary tube
[
3.0
✕
[
1.4
✕
600 (4 pcs)
[
9.52
Capillary tube
[
3.0
✕
[
2.0
✕
200
Capillary tube
[
3.0
✕
[
2.0
✕
200
Strainer
#100
Stop valve
(with strainer #100)
R.V. coil
OFF
ON
Refrigerant flow in cooling
Refrigerant flow in heating
Ambient
temperature
thermistor
RT65
Outdoor heat
exchanger
temperature
thermistor
RT68
FAN-OUT
HEX-OUT
Discharge
temperature
thermistor RT62
Stop valve
(with service port)
Stop valve
(with service port)
●
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.
Outdoor unit union diameter
For
Liquid
6.35(1/4)
Indoor unit A
Gas
9.52(3/8)
Liquid
6.35(1/4)
Indoor unit B
Gas
9.52(3/8)
Unit : mm (inch)
Piping length each indoor unit (a, b)
20m
Total piping length (a+b)
30m
Bending point for each unit
20
Total bending point
30
❋
It does not matter which unit is higher.
Unit:mm
MXZ-2A40VA MXZ-2A52VA
MAX REFRIGERANT PIPING LENGTH
a
b
Outdoor
unit
Indoor
units
15m
10m
15m
Refrigerant piping length (one way, 2 unit total)
Calculation : Xg=20g/mx(Refrigerant piping length(m)-20)
Outdoor unit
precharged
30m
200
20m
0
1,300
OB377--2.qxp 05.12.14 3:13 PM Page 35
