Mitsubishi Electric MXZ-A18WV Service Manual page 32

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