13
REFRIGERANT SYSTEM DIAGRAM
7
Distributor
Thermistor TH7
(Ambient)
Heat exchanger
Refrigerant
GAS pipe
connection
(1 inch)
Refrigerant
LIQUID pipe
connection
(3/8 inch)
Stop valve
(with service port)
Strainer
#100
Power
receiver
LEV-B
Strainer
#100
Strainer
#100
Thermistor
TH6
(2-phase pipe)
Thermistor TH3
(Liquid)
Charge plug
(Low pressure)
Charge plug
(High pressure)
HIC
Thermistor TH4
(Discharge)
Thermistor TH34
(Comp.surface)
COMP
Injection port
Strainer
#50
REV/V
Strainer
#100
Strainer
#100
Muffler
P-sensor
Ball valve
Thermistor
TH32
(Suction)
L/P SW
H/P SW
Refrigerant flow in cooling
Refrigerant flow in heating
Thermistor TH2
(Liquid pipe)
Thermistor TH1
(Outlet water)
Plate HEX
Strainer
#100
Strainer
#100
Plate HEX
Water IN
Water OUT
Joint pipe
(Brazing)
LEV-C
LEV-A
PUHZ-SHW230YKA
<Reference> System example: Plate HEX (MWA2 * 2pcs) + FTC (TH1/2)
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)
L/P SW
Low pressure switch (63L)
For protection (OFF: -0.03MPa)
REV/V
Reversing (4-way) valve (21S4)
Change the refrigerant circuit (Heating / Cooling) and for Defrosting
Charge plug
Charge plug
High pressure / Low pressure / For production test use
P-Sensor
Pressure sensor (63HS)
For calculation of the condensing temperature from high pressure
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 temperature thermistor
Outdoor 2-phase pipe temperature
TH7
Ambient temperature thermistor
For fan control and for compressor frequency control
TH34
Comp. surface temperature thermistor For protection
Power Receiver Power Receiver
For accumulation of refrigerant
HIC
Heat interchange circuit
For high heating capacity
Plate HEX
Plate Heat Exchanger
MWA2-38PA (MITSUBISHI)
<Reference>
System example
TH1
Outlet water temperature thermistor
For fl ow temp. controller
TH2
Liquid pipe temperature thermistor
For fl ow temp. controller
OCH534