Refrigerant System Diagram - Mitsubishi Electric PUHZ-SW75VHA Service Manual

9

REFRIGERANT SYSTEM DIAGRAM

PUHZ-SW75VHA.UK
PUHZ-SW75VHA-BS.UK
Stop valve
(with service port)
Refrigerant GAS pipe
connection 15.88(5/8)
Linear
expansion valve B
Stop valve
(with service port)
Refrigerant LIQUID pipe
connection 9.52(3/8)
PUHZ-SW100VHA
PUHZ-SW100VHA-BS
PUHZ-SW100YHA
PUHZ-SW100YHA-BS
Ball valve
Refrigerant GAS pipe
connection ø15.88(5/8)
Linear
expansion valve B
Stop valve
(with service port)
Refrigerant LIQUID pipe
connection ø9.52(3/8)
Symbol Part name
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
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
OCH533A
Pressure
sensor 63HS
4-way valve
Strainer
#50
Charge plug
(Low pressure)
Strainer
#100
Strainer
Power
#100
receiver
Strainer
#100
PUHZ-SW120VHA
PUHZ-SW120VHA-BS
PUHZ-SW120YHA
PUHZ-SW120YHA-BS
Pressure
sensor 63HS
Strainer
4-way valve
#50
Charge plug
(Low pressure)
Strainer
#100
Strainer
#100
Strainer
#100
Power
receiver
Linear expansion valve A
Strainer
#100
DC inverter twin rotary compressor (Mitsubishi Electric Corporation)
For protection (OFF:4.15MPa)
For protection (OFF:-0.03MPa) (SW100/120)
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
Charge plug
(High pressure)
High pressure
switch 63H
Thermistor TH4
(Discharge)
Thermistor TH34
(Comp. surface)
Compressor
Linear expansion valve A
Strainer
#100
Charge plug
(High pressure)
Low pressure
High pressure
switch 63L
switch 63H
Thermistor TH4
(Discharge)
Thermistor TH34
(Comp. surface)
Compressor
Strainer
#100
Detail
Cooling:Primary LEV
Cooling:Secondary LEV
Cooling:Sub cool liquid temperature
19
Thermistor TH7
(Ambient)
Heat exchanger
Thermistor TH6
(2-phase pipe)
Thermistor TH3
(Liquid)
Distributor
Thermistor TH7
Heat exchanger
(Ambient)
Thermistor TH6
(2-phase pipe)
Thermistor TH3
(Liquid)
Distributor
Refrigerant flow in cooling
Refrigerant flow in heating
unit : mm(inch)