Heating - Mitsubishi Electric MXZ-2A40VA Service Manual

MXZ-4A80VA
R.V. coil
Refrigerant flow in cooling
OFF
ON Refrigerant flow in heating
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
[9.52
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 16-1.
Indoor unit
class Pipe diameter
Liquid 6.35(1/4)
22/25/35
Gas 9.52(3/8)
Liquid 6.35(1/4)
50
Gas 12.7(1/2)
Liquid 6.35(1/4)
60
Gas 15.88(5/8)
Liquid 9.52(3/8)
71
Gas 15.88(5/8)
High-pressure
switch
Oil separator
Ball valve with
service port
[9.52
[9.52
[16 Muffler
Capillary tube
[4.0 [2.8 90
[6.35
LEV A
Strainer
#100
Ball valve
[6.35
LEV B
Strainer
#100
[6.35
Strainer
LEV C
Distributor
#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 15.88(5/8)
Liquid 9.52(3/8)
Gas 15.88(5/8)
[16
Compressor
Discharge
temperature
thermistor RT62
Capillary tube
[2.5 [0.6 1000
4-way valve
[16
[16
Strainer
LEV E
#100
Power
receiver [9.52
Indoor
units
25m
70m
10m
25
70
c
70m
d
600
Indoor unit A
Indoor unit B
Indoor unit C
Indoor unit D
38
[16
Outdoor
heat
exchanger
Outdoor heat
exchanger
temperature
thermistor
RT68
Defrost
thermistor
RT61
Capillary tube
[4.0 [2.4 400
Strainer
Distributor
#100
a
b
Outdoor
unit
Outdoor unit union diameter
For
Liquid
Gas
Liquid
Gas
Liquid
Gas
Liquid
Gas
Unit:mm
Ambient
temperature
thermistor
RT65
H
H
H
Unit : mm (inch)
6.35(1/4)
12.7(1/2)
6.35(1/4)
9.52(3/8)
6.35(1/4)
9.52(3/8)
6.35(1/4)
9.52(3/8)