Refrigerant System Diagram - Mitsubishi Electric Mr. Slim PUHZ-SHW230YKA Service Manual

7

REFRIGERANT SYSTEM DIAGRAM

PUHZ-SHW230YKA
<Reference> System example: Plate HEX (MWA2 * 2pcs) + FTC (TH1/2)
Thermistor TH1
(Outlet water)
Water OUT
Plate HEX
Plate HEX
Water IN
Symbol
COMP Compressor
H/P SW High pressure switch (63H)
L/P SW Low pressure switch (63L)
REV/V Reversing (4-way) valve (21S4)
Charge plug Charge plug
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
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
OCH534
Ball valve
Joint pipe
(Brazing)
Strainer
Refrigerant #50
GAS pipe
connection
(1 inch) Charge plug
(Low pressure)
LEV-B
Refrigerant
LIQUID pipe
connection
Thermistor TH2
(3/8 inch)
(Liquid pipe)
Strainer
#100
Stop valve
(with service port)
Part name
P-sensor
REV/V
Charge plug
(High pressure)
Muffler
L/P SW
Strainer
#100
Strainer Strainer
#100 #100
Power
receiver
Strainer
#100
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
High pressure / Low pressure / For production test use
For calculation of the condensing temperature from high pressure
Heating:Secondary LEV Cooling:Primary LEV
Heating:Primary LEV Cooling:Secondary 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 fl ow temp. controller
For fl ow temp. controller
13
Heat exchanger
H/P SW
Thermistor
TH32
(Suction)
Thermistor TH4
(Discharge)
Thermistor TH34
(Comp.surface)
Injection port
COMP
HIC
Refrigerant flow in cooling
Refrigerant flow in heating
LEV-C
Detail
Cooling:Sub cool liquid temperature
<Reference>
System example
Thermistor TH7
(Ambient)
Thermistor
TH6
(2-phase pipe)
Thermistor TH3
(Liquid)
Distributor
Strainer
#100
LEV-A
Strainer
#100