Refrigerant System Diagram - Mitsubishi Electric PUHZ-W112VHA Service Manual

7

REFRIGERANT SYSTEM DIAGRAM

PUHZ-W112VHA
PUHZ-W112VHA-BS
PUHZ-W112VHAR1
PUHZ-W112VHAR1-BS
Water OUT
Plate HEX
TH32
Water IN
TH6
Symbol Part name
COMP Compressor
H/P SW High pressure switch (63H)
L/P SW Low pressure switch (63L)
Plate HEX Plate Heat Exchanger
REV/V Reversing (4-way) valve (21S4)
STOP VALVE Stop 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
TH33 Suction temperature thermistor
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
TH34 Comp. surface temperature thermistor
Power Receive Power Receiver
r
*1 : PUHZ-W112VHA(-BS), PUHZ-W112VHAR1(-BS), PUHZ-W112VHAR2(-BS)
*2
: PUHZ-W112VHAR3(-BS)
OCH562D
PUHZ-W112VHAR2
PUHZ-W112VHAR2-BS
PUHZ-W112VHAR3
PUHZ-W112VHAR3-BS
STOP VALVE
REV/V
CHECK/V
Strainer
(#100)
Power
Receiver
Strainer
(#100)
LEV-B
Strainer(#100)
DC inverter scroll compressor (Mitsubishi Electric Corporation)
For protection (OFF: 4.15MPa)
For protection (OFF: −0.03MPa)
MWA2-46LM (MITSUBISHI)
Change the refrigerant circuit (Heating/Cooling) and for Defrosting
For refrigerant charge
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 LEV control
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
15
P-Sensor
CHECK/V
H/P SW
L/P SW
TH4
TH33
TH34
Strainer
(#100)
COMP
Detail
*1 /ACH-70X-52H(ALFA LAVAL)
Cooling: Primary LEV
Cooling: Secondary LEV
Cooling: Sub cool liquid temperature
TH7
TH3
Distributor
Strainer(#100)
TH8 P/B
LEV-A
Refrigerant flow in cooling
Refrigerant flow in heating
*2
Cooling: Evaporating temperature