Refrigerant System Diagram; Cooling - Mitsubishi Electric MXZ-A14WV Service Manual

REFRIGERANT SYSTEM DIAGRAM

9
MXZ-A14WV -
E1
MXZ-A18WV -
E1
R.V. coil
heating ON
cooling OFF
Refrigerant flow in cooling
Refrigerant flow in heating
Stop valve
(with service port)
Indoor
Unit B
Indoor
Unit A
Stop valve
(with service port)
Stop valve
Indoor
Unit A
Indoor
Unit B
Stop valve
MAX REFRIGERANT PIPING LENGTH
Piping length each indoor unit (a, b)
Total piping length (a+b)
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, 2 unit total)
Outdoor unit
precharged
1,750
Calculation : Xg=20g/mx(Refrigerant piping length(m)-20)
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 12.7(1/2)
Discharge
temperature
thermistor
RT61
4-way valve
Gas pipe temperature
B thermistor
Muffler
Gas pipe temperature
A thermistor
Capillary tube
{3.0 {2.0 400
{6
Strainer
#100
{6
Strainer
Capillary tube
#100
{3.0 {2.0 400
20m
25m
0
100
Extension pipe diameter
Liquid
Gas
Liquid
Gas
Compressor
{8
Muffler
Capillary tube
{1.8 {0.6 750
LEV (A)
LEV (B)
Indoor
units
20m
30m
10m
15
30
30m
200
6.35(1/4)
9.52(3/8)
6.35(1/4)
12.7(1/2)
30
{12
{12
Evaporation
temperature
thermistor
RT63
Outdoor
heat
Strainer
exchanger
a
Outdoor
unit
b
Outdoor unit union diameter
For
Liquid
Indoor unit A
Gas
Liquid
Indoor unit B
Gas
Unit:mm
High-pressure
protect thermistor
RT68
Defrost
thermistor
RT62
Capillary tube
{3.0 {1.8 600
H
H
H
Unit : mm (inch)
6.35(1/4)
9.52(3/8)
6.35(1/4)
9.52(3/8)