18
OCH748
REFRIGERANT SYSTEM DIAGRAM
8
Distributor
TH7
Strainer(#100)
Strainer(#100)
Receiver
Power
LEV-B
TH34
Plate HEX
Water IN
Water OUT
Strainer
(#100)
TH3
STOP VALVE
CHECK/V
CHECK/V
H/P SW
TH4
TH32
TH33
TH8
P/B
LEV-A
LEV-C
COMP
HIC
INJ Port
REV/V
P-Sensor
Strainer
(#100)
Strainer
(#100)
PRV
TH6
Refrigerant flow in heating
Refrigerant flow in cooling
PUZ-HWM140VHA(-BS) PUZ-HWM140YHA(-BS)
Symbol
Part name
Detail
COMP
Compressor
DC inverter scroll compressor (Mitsubishi Electric Corporation)
H/P SW
High pressure switch (63H)
For protection (OFF: 4.15MPa)
Plate HEX
Plate Heat Exchanger
MWA2-34HM
(Mitsubishi Electric Corporation)
REV/V
Reversing (4-way) valve (21S4)
Change the refrigerant circuit (Heating / Cooling) and for Defrosting
STOP VALVE Stop valve
For refrigerant charge
CHECK/V
Check valve
High pressure / Low pressure
P-Sensor
Pressure sensor (63HS)
For calculation of the saturation temperature from refrigerant pressure
P/B
Power board
Inverter power board
LEV-A
Linear expansion valve -A
Heating: Secondary LEV
Cooling: Primary LEV
LEV-B
Linear expansion valve -B
Heating: Primary LEV
Cooling: Secondary LEV
LEV-C
Linear expansion valve -C
For HIC (heating only)
TH32
Suction temperature thermistor
For LEV control
TH3
Liquid temperature thermistor
Heating: Evaporating temperature
Cooling: Sub cool liquid temperature
TH4
Discharge temperature thermistor
For LEV control and for compressor protection
TH6
2-Phase pipe thermistor
Heating: Evaporating temperature Cooling: Condensing temperature
TH34
Plate HEX liquid temperature thermistor Heating: Sub cool liquid temperature Cooling: Evaporating temperature
TH7
Ambient temperature thermistor
For fan control and for compressor frequency control
TH8
Heatsink temperature thermistor
For power board protection
TH33
Comp. surface temperature thermistor For compressor protection
Power
Receiver
Power Receiver
For accumulation of refrigerant
HIC
Heat interchange circuit
For high heating capacity
