Service manual

22
REFRIGERANT SYSTEM DIAGRAM
7
Room
Temperature
thermistor
RT11
Sub
indoor coil
thermistor
RT13
Main
indoor coil
thermistor
RT12
Refrigerant pipe {3/8
(with heat insulator)
Flared connection
Stop valve
(with service port)
Stop valve
(with strainer)
Fusible
plug
Service
port
Service
port
Muffler
Muffler
4-way valve
Compressor
Capillary
tube
Expansion
valve
Capillary tube
O.D.0.12OI.D.0.079O7-7/8
Flow of refrigerant (cooling)
Flow of refrigerant (heating)
Capillary
tube
R.V. coil
heating ON
cooling OFF
O.D.0.12OI.D.0.079O11-13/16 O.D.0.12OI.D.0.079O11-13/16
Discharge
temperature
thermistor
RT62
Flared connection
Refrigerant pipe {1/4
(with heat insulator)
Indoor
heat
exchanger
Outdoor
heat
exchanger
Defrost
thermistor
RT61
Strainer
Unit:inch
MSZ09UN
INDOOR UNIT
OUTDOOR UNIT
Room
Temperature
thermistor
RT11
Refrigerant pipe {1/2
(with heat insulator)
Flared connection
Stop valve
(with service port)
Stop valve
(with strainer)
Fusible
plug
Service
port
Service
port
Muffler
Muffler
4-way valve
Compressor
Capillary
tube
Expansion
valve
Capillary tube
O.D.0.12OI.D.0.079O7-7/8
Flow of refrigerant (cooling)
Flow of refrigerant (heating)
Capillary
tube
R.V. coil
heating ON
cooling OFF
O.D.0.12OI.D.0.079O11-13/16 O.D.0.12OI.D.0.079O11-13/16
Discharge
temperature
thermistor
RT62
Flared connection
Refrigerant pipe {1/4
(with heat insulator)
Indoor
heat
exchanger
Outdoor
heat
exchanger
Main
indoor coil
thermistor
RT12
Defrost
thermistor
RT61
Strainer
MSZ12UN
INDOOR UNIT OUTDOOR UNIT
Unit:inch
MUZ09UN
MUZ12UN
OB297--1.qxp 04.2.4 4:20 PM Page 22