Refrigerant System Diagram - Mitsubishi Electric PUHZ-SHW230YKA2 Service Manual

7

REFRIGERANT SYSTEM DIAGRAM

PUHZ-SHW230YKA2
<Reference> System example: Plate HEX (MWA2 * 2 pcs) + FTC (TH1/2)
TH1
Water OUT
Plate HEX
Plate HEX
Water IN
Symbol
COMP Compressor
INJ. port Compressor Injection port
Muffler Discharge muffler
HEX Heat exchanger
H/P SW High pressure switch (63H)
L/P SW Low pressure switch (63L)
REV/V Reversing (4-way) valve (21S4)
CHECK/V Check valve
P-Sensor Pressure sensor (63HS)
LEV-A Linear expansion valve -A
LEV-B Linear expansion valve -B
LEV-C Linear expansion valve -C
TH32 Suction temperature thermistor
TH3 Liquid temperature thermistor
TH4 Discharge temperature thermistor
TH6 2-phase pipe temperature thermistor
TH7 Ambient temperature thermistor
TH8 Heat sink temperature
TH34 Comp. surface temperature thermistor For protection
Power Receiver Power Receiver
HIC Heat interchange circuit
Plate HEX Plate Heat Exchanger
TH1 Outlet water temperature thermistor
TH2 Liquid pipe temperature thermistor
OCH594B
PUHZ-SHW230YKA2R1
Ball valve
Joint pipe
(Brazing)
Strainer
Refrigerant #50
GAS pipe
connection
(1 inch) Charge plug
(Low pressure)
LEV-B
Refrigerant
LIQUID pipe
connection
TH2
(1/2 inch)
Strainer
#100
Stop valve
(with service port)
Part name
DC inverter scroll compressor (Mitsubishi Electric Corporation)
For protection (OFF: 4.15MPa)
For protection (OFF: -0.03MPa)
Change the refrigerant circuit (Heating / Cooling) and for Defrosting
For calculation of the condensing temperature from high pressure
Heating:Secondary LEV
Heating:Primary LEV
For HIC (heating only)
For LEV control
Heating:Evaporating temperature
For LEV control and for compressor protection
Outdoor 2-phase pipe temperature
For fan control and for compressor frequency control
For accumulation of refrigerant
For high heating capacity
MWA2-38PA (MITSUBISHI)
For flow temp. controller
For flow temp. controller
PUHZ-SHW230YKA2R2
P-sensor
REV/V
Charge plug
(High pressure)
Muffler
L/P SW
Strainer
#100
Strainer Strainer
#100 #100
Power COMP
receiver
Strainer
#100
LEV-C
Detail
Cooling:Primary LEV
Cooling:Secondary LEV
Cooling:Sub cool liquid temperature
14
TH7
HEX
H/P SW
Distributor
TH32
Strainer
#100
TH4
TH34
LEV-A
Strainer
INJ. port
#100
HIC
Refrigerant flow in cooling
Refrigerant flow in heating
<Reference>
System example
TH6
TH3