Necessary Conditions For System Construction; Refrigerant System Diagram - Mitsubishi MXZ-8B140VA Technical & Service Manual

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NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION

REFRIGERANT SYSTEM DIAGRAM

MXZ-8B140VA MXZ-8B140YA MXZ-8B160VA MXZ-8B160YA
Condenser / evaporator
Room temperature
temperature thermistor
(TH5 or RT12) thermistor (TH1 or RT11)
Thermistor (TH-A~E)
(Gas pipe temperature)
(Linear expansion valve)
Strainer
#100
Pipe temperature
Capillary
thermistor / liquid
(TH2 or RT13)
Indoor units
MXZ-8B140VA
MXZ-8B160VA
Outdoor unit
MXZ-8B140YA
MXZ-8B160YA
PAC-AK53BC
Branch box
PAC-AK32BC
Piping connection size
A
Liquid (mm)
{9.52
Gas (mm)
{15.88
■ In case of using 1-branch box
Flare connection employed (No brazing)
A
■ In case of using 2-branch boxes
A
B
OCH480D
4-way valve
E
Service port
D
C
B Strainer
#50
A
Ball valve
Check valve
(Low Pressure)
Strainer
LEV A~E
#100
Stop valve
Strainer
#100
Service port
Capillary
tube3
tube4
Branch box
Capillary tube 1
(For return of oil
from oil separator)
[2.5 o [0.8 o L1000
The pipe connection size differs according to the type and capacity of indoor units.
Match the piping connection size of branch box with indoor unit.
If the piping connection size of branch box does not match the piping connection size
of indoor unit, use optional different-diameter (deformed) joints to the branch box side.
(Connect deformed joint directly to the branch box side.)
Branch box
B B B
2 branches pipe (joint)
: optional parts
A
A
B
Branch box #2
Check valve
Bypass valve(SV2)
(High Pressure)
Bypass valve (SV1)
Strainer
#100
Capillary
tube1
High
pressure
switch
63H
Capillary
tube2
Thermistor TH4
Low
(Compressor temperature)
pressure
switch
63L
Accumulator Compressor
Strainer
#100
Outdoor unit
Capillary tube 3
Capillary tube 2
ahead of LEV
(For SV2)
(in cooling mode)
[4 o [2.4 o L250
([4 o [2.4 o L140) o 5 ([4 o [2.2 o L130) o 5
([4 o [2.4 o L140) o 3 ([4 o [2.2 o L130) o 3
B
B B
Branch box #1
■ installation procedure (2 branch pipe (joint))
B B B
20
High pressure sensor
discharge pressure sensor
63HS
Thermistor TH7
(Outdoor temperature)
Thermistor TH6
(Pipe temperature : condenser)
Thermistor TH3
(Pipe temperature : liquid)
Distributor
with Strainer
Oil separator
Thermistor TH8
(Fin temperature)
Refrigerant flow in cooling
Refrigerant flow in heating
Capillary tube 4
behind LEV
(in cooling mode)
Refer to the installation manuals of
MSDD-50AR-E and MSDD-50BR-E.
unit : mm