Refrigerant System Diagram; Max Refrigerant Piping Length - Mitsubishi Electric MXZ-18TV Service Manual

9

REFRIGERANT SYSTEM DIAGRAM

MXZ-18TV -
E1
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

MXY-18TV -
E1
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 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)
NOTE: SEH-1.6AR is equivalent to class 12.
Discharge
temperature
thermistor
4-way valve
Gas pipe temperature
B thermistor
Muffler
Gas pipe temperature
A thermistor
Capillary tube
LEV (A)
{3.0 {2.0 400
{6
Strainer
{6
Strainer
Capillary tube
LEV (B)
{3.0 {2.0 400
Extension pipe diameter
Liquid 6.35(1/4)
Gas 9.52(3/8)
Liquid 6.35(1/4)
Gas 12.7(1/2)
Compressor
{8
Muffler
Capillary tube
{2.4 {0.6 750
20m
30m
10m
15
30
8
R.V. coil
heating ON
cooling OFF
Refrigerant flow in cooling
Refrigerant flow in heating
{16
{12
Evaporation
temperatuer
thermistor
Outdoor
heat
exchanger
a
Outdoor
unit
b
Outdoor unit union diameter
For
Liquid
Indoor unit A
Gas
Liquid
Indoor unit B
Gas
Unit:mm
Defrost
thermistor
Capillary tube
{4.0 {2.4 300
H
H
H
Unit : mm (inch)
6.35(1/4)
9.52(3/8)
6.35(1/4)
9.52(3/8)