Refrigerant System Diagram - Mitsubishi Electric PUHZ-SW40VHA Service Manual

9

REFRIGERANT SYSTEM DIAGRAM

PUHZ-SW40VHA
PUHZ-SW50VHA
Stop valve
(with service port)
Refrigerant GAS pipe
connection ø12.7(1/2F)
Linear
expansion valve B
Stop valve
Refrigerant LIQUID pipe
connection ø6.35(1/4F)
Symbol Part name
COMP Compressor
H/P SW High pressure switch (63H)
REV/V
Reversing (4-way) valve (21S4)
Charge plug Charge plug
P-Sensor High pressure sensor (63HS)
LEV-A Linear expansion valve -A
LEV-B Linear expansion valve -B
TH3 Liquid temperature thermistor
TH4 Discharge temperature thermistor
TH6 2-phase pipe temperature thermistor
TH7 Ambient temperature thermistor
TH34 Comp.surface temperature thermistor
Power Receiver Power Receiver
OCH525
PUHZ-SW40VHA-BS
PUHZ-SW50VHA-BS
Solenoid valve
(Four-way valve)
Strainer
#50
Power
receiver
Strainer
#100
DC inverter twin rotary compressor (Mitsubishi Electric Corporation)
For protection (OFF:4.15MPa)
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
Heating:Primary LEV
Heating:Evaporating temperature
For LEV control and for compressor protection
Outdoor 2-phase pipe temperature
For fan control and for compressor frequency control
For compressor protection
For accumulation of refrigerant
High pressure sensor
(63HS)
Charge plug
High pressure
switch 63H
Thermistor TH4
(Discharge)
Thermistor TH34
(Comp. surface)
Compressor
Linear expansion valve A
Strainer
#100
Detail
Cooling:Primary LEV
Cooling:Secondary LEV
Cooling:Sub cool liquid temperature
12
Unit : mm (inch)
Thermistor TH7
Heat exchanger
(Ambient)
Thermistor TH6
(2-phase pipe)
Thermistor TH3
(Liquid)
Distributor
Refrigerant flow in cooling
Refrigerant flow in heating