36
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)
Liquid
6.35(1/4)
Liquid
6.35(1/4)
50
Gas
12.7(1/2)
Gas
12.7(1/2)
Ball valve with
service port
Ball valve
Strainer
#100
Power
receiver
LEV A
LEV B
LEV C
Oil separator
Compressor
Defrost
thermistor
RT61
Distributor
Muffler
4-way valve
LEV E
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
[
9.52
[
12
[
16
[
16
[
16
Capillary tube
[
3.6
✕
[
2.4
✕
500 (8 pcs)
Capillary tube
[
2.5
✕
[
0.6
✕
1000
[
9.52
Capillary tube
[
4.0
✕
[
2.8
✕
100
Capillary tube
[
4.0
✕
[
2.8
✕
100
Capillary tube
[
4.0
✕
[
2.8
✕
100
Discharge
temperature
thermistor RT62
Strainer
#100
Strainer
#100
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
Strainer
#100
●
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 16-1.
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)
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
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
15m
10m
15m
Refrigerant piping length (one way, 3 unit total)
Calculation : Xg=20g/mx(Refrigerant piping length(m)-40)
Outdoor unit
precharged
50m
200
40m
0
2,700
Unit:mm
MXZ-3A54VA
MAX REFRIGERANT PIPING LENGTH
OB377--2.qxp 05.12.14 3:13 PM Page 36
