Refrigerant System Diagram - Mitsubishi Electric PUHZ-W90VHA Service Manual

7

REFRIGERANT SYSTEM DIAGRAM

PUHZ-W90VHA
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 Heatsink temperature thermistor
Receiver Receiver
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:4.15MPa)
ACH30 - 40 Plates (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 accumulation of refrigerant
P-Sensor
S/V
CHECK/V
H/P SW
TH4
TH8
Strainer
(#100)
COMP
LEV-A
Strainer(#100)
Detail
Cooling:Primary LEV
Cooling:Secondary LEV
10
TH7
TH3
Distributor
P/B
Refrigerant flow in heating
Refrigerant flow in cooling
Cooling:Sub cool liquid temperature
Cooling:Evaporating temperature