Refrigerant System Diagram - Mitsubishi Electric PUHZ-SW75VHAR6 Service Manual

9

REFRIGERANT SYSTEM DIAGRAM

PUHZ-SW75VHAR6
Stop valve
(with service port)
Refrigerant GAS pipe
connection [15.88(5/8)
Stop valve
(with service port)
Refrigerant LIQUID pipe
connection [9.52(3/8)
Symbol
COMP Compressor
Muffler Muffler
H/P SW High pressure switch (63H)
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
OCH755
P-Sensor
REV/V
Strainer
#50
Charge plug
(Low pressure)
Strainer
#100
Strainer
Power
#100
receiver
LEV-B
Strainer
#100
Part name
DC inverter twin rotary compressor (Mitsubishi Electric Corporation)
Discharge muffler
For protection (OFF: 4.15MPa)
Change the refrigerant circuit (Heating / Cooling) and for Defrosting
High pressure / Low pressure
For calculation of the condensing temperature from high pressure
Heating: Secondary LEV
Heating: Primary LEV
Heating: Evaporating temperature Cooling: Subcooled liquid 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)
H/P SW
Muffler
TH4
TH34
P.B
COMP
TH8
LEV-A
Strainer
#100
Detail
Cooling: Primary LEV
Cooling: Secondary LEV
18
TH7
Heat
exchanger
TH6
TH3
Distributor
Refrigerant flow in cooling
Refrigerant flow in heating
unit: mm