Refrigerant System Diagram - Mitsubishi Electric EHST20C-VM6HB Service Manual

10

REFRIGERANT SYSTEM DIAGRAM

PUHZ-SW75VHA.UK
PUHZ-SW75VHA-BS.UK
Refrigerant GAS pipe
connection [15.88(5/8)
Stop valve
(with service port)
Refrigerant LIQUID pipe
connection [9.52(3/8)
PUHZ-SW100VHA.UK
PUHZ-SW100VHA-BS.UK PUHZ-SW100VHAR3-BS.UK
PUHZ-SW100YHA.UK
PUHZ-SW100YHA-BS.UK PUHZ-SW100YHAR1-BS.UK
PUHZ-SW120VHA.UK
PUHZ-SW120VHA-BS.UK PUHZ-SW120VHAR3-BS.UK
PUHZ-SW120YHA.UK
PUHZ-SW120YHA-BS.UK PUHZ-SW120YHAR1-BS.UK
Refrigerant GAS pipe
connection ø15.88(5/8)
Stop valve
(with service port)
Refrigerant LIQUID pipe
connection ø9.52(3/8)
Symbol
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
OCH533D
PUHZ-SW75VHAR3.UK
PUHZ-SW75VHAR3-BS.UK
Stop valve
(with service port)
4-way valve
Strainer
#50
Charge plug
(Low pressure)
Strainer
#100
Linear
expansion valve B Power
receiver
Strainer
#100
PUHZ-SW100VHAR3.UK
PUHZ-SW100YHAR1.UK
PUHZ-SW120VHAR3.UK
PUHZ-SW120YHAR1.UK
Pressure
sensor 63HS
Ball valve
Strainer
4-way valve
#50
Charge plug
(Low pressure)
Strainer
#100
Strainer
#100
Linear
Power
expansion valve B
receiver
Strainer
#100
Part name
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
Pressure
sensor 63HS
Charge plug
(High pressure)
High pressure
switch 63H
Thermistor TH4
(Discharge)
Thermistor TH34
(Comp. surface)
Strainer Compressor
#100
Linear expansion valve A
Strainer
#100
PUHZ-SW100VHAR4.UK
PUHZ-SW100VHAR4-BS.UK
PUHZ-SW100YHAR3.UK
PUHZ-SW100YHAR3-BS.UK
PUHZ-SW120VHAR4.UK
PUHZ-SW120VHAR4-BS.UK
PUHZ-SW120YHAR3.UK
PUHZ-SW120YHAR3-BS.UK
Charge plug
(High pressure)
Low pressure
High pressure
switch 63L
switch 63H
Thermistor TH4
(Discharge)
Thermistor TH34
(Comp. surface)
Strainer
#100
Compressor
Linear expansion valve A
Strainer
#100
Detail
Cooling:Primary LEV
Cooling:Secondary LEV
Cooling:Sub cool liquid temperature
25
PUHZ-SW75VHAR4.UK
PUHZ-SW75VHAR4-BS.UK
unit: mm (in)
Thermistor TH7
(Ambient)
Heat
exchanger
Thermistor TH6
(2-phase pipe)
Thermistor TH3
(Liquid)
Distributor
P.B
TH8
PUHZ-SW100YHAR4.UK
PUHZ-SW100YHAR4-BS.UK
PUHZ-SW120YHAR4.UK
PUHZ-SW120YHAR4-BS.UK
Thermistor TH7
(Ambient)
Thermistor TH6
Heat
(2-phase pipe)
exchanger
Distributor
Thermistor TH3
(Liquid)
P.B
TH8
Refrigerant flow in cooling
Refrigerant flow in heating