Refrigerant System Diagram - Mitsubishi Electric PUHZ-W50VHA Service Manual

8

REFRIGERANT SYSTEM DIAGRAM

PUHZ-W50VHA(-BS)
PUHZ-W50VHAR1(-BS)
PUHZ-W50VHAR2(-BS)
PUHZ-W50VHAR3(-BS)
Water OUT
Plate HEX
TH32
Water IN
TH6
Symbol
COMP Compressor
H/P SW High pressure switch (63H)
Plate HEX Plate Heat Exchanger
REV/V Reversing (4-way) valve (21S4)
S/V Solenoid valve
CHECK/V Check valve
P-Sensor Pressure sensor (63HS)
P/B Power board
LEV-A Linear expansion valve-A
LEV-B Linear expansion valve-B
TH32 Inlet water temperature thermistor
TH3 Liquid temperature thermistor
TH4 Discharge temperature thermistor
TH6 Plate HEX liquid temperature thermistor
TH7 Ambient temperature thermistor
TH8 Heat sink temperature thermistor
TH33 Comp. surface temperature thermistor
Receiver Receiver
*1 PUHZ-W50VHA(-BS), PUHZ-W50VHAR1(-BS)
*2 PUHZ-W50VHAR2(-BS), PUHZ-W50VHAR3(-BS)
*3 PUHZ-W85VHA(-BS), PUHZ-W85VHAR1(-BS)
OCH439M
PUHZ-W85VHA(-BS)
PUHZ-W85VHAR1(-BS)
CHECK/V
REV/V
CHECK/V
Receiver
Strainer
(#100)
LEV-B
Strainer(#100)
Part name
DC inverter twin rotary compressor (Mitsubishi Electric Corporation)
For protection (OFF: 4.15 MPa)
ACH30-30 (ALFA LAVAL)
ACH30-40 (ALFA LAVAL)
Change the refrigerant circuit (Heating/Cooling) and for Defrosting
For production test use
High pressure/Low pressure/For production test use
For calculation of the condensing temperature from high pressure
Inverter power board
Heating: Secondary LEV
Heating: Primary LEV
For freeze protection and for compressor frequency control
Heating: Evaporating temperature
For LEV control and for compressor protection
Heating: Sub cool liquid temperature
For fan control and for compressor frequency control
For power board protection
For compressor protection
For accumulation of refrigerant
P-Sensor
S/V
CHECK/V
H/P SW
TH33 (except W85VHA(-BS))
TH4
Strainer
(#100)
COMP
LEV-A
Strainer(#100)
Detail
(*1) /MWA1-28LM (MITSUBISHI)
(*3)
Cooling: Primary LEV
Cooling: Secondary LEV
50
TH7
Distributor
TH8 P/B
Refrigerant flow in cooling
Refrigerant flow in heating
(*2)
Cooling: Sub cool liquid temperature
Cooling: Evaporating temperature
TH3
/