Puz-Ha42Nka - Mitsubishi Electric PLA-A12EA7 Service Manual

6 REFRIGERANT SYSTEM DIAGRAM

PUZ-HA42NKA

Ball valve
Refrigerant
GAS pipe
connection
[5/8 [15.88]
Strainer
#50
Charge plug
(Low pressure)
Refrigerant
LIQUID pipe
connection
[3/8 [9.52]
Strainer
#100
Stop valve
(with service port)
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
LEV-C Linear expansion valve -C
TH32 Suction temperature thermistor
TH3 Liquid temperature thermistor
TH4 Discharge temperature thermistor
TH6 2-phase pipe temperature thermistor
TH7 Ambient temperature thermistor
TH34 Comp. surface temperature thermistor For protection
Power Receiver Power Receiver
HIC Heat interchange circuit
Due to continuing improvement, above specification may be subject to change without notice.
54
P-sensor
REV/N
Strainer
#100
Strainer
#100
Power
LEV-B
receiver
LEV-C
Parts name
P-Series (March 2017)
Charge plug
(High pressure)
Muffler
H/P SW
L/P SW
Thermistor
TH32
(Suction)
Thermistor TH4 (Discharge)
Thermistor TH34 (Comp. surface)
Strainer
#100
Injection port
COMP
HIC
DC inverter scroll compressor (Mitsubishi Electric Corporation)
For protection (OFF: 4.15MPa)
For protection (OFF: −0.03MPa)
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 Cooling:Primary LEV
Heating:Primary LEV Cooling:Secondary LEV
For HIC (heating only)
For LEV control
Heating:Evaporating temperature
For LEV control and for compressor protection
Outdoor 2-phase pipe temperature
For fan control and for compressor frequency control
For accumulation of refrigerant
For high heating capacity
Unit: inch [mm]
Thermistor TH7
(Ambient)
Heat exchanger
Thermistor
TH6
(2-phase pipe)
Thermistor TH3
(Liquid)
Distributor
Strainer
#100
LEV-A
Refrigerant flow in cooling
Refrigerant flow in heating
Detail
Cooling:Sub cool liquid temperature
© 2017 Mitsubishi Electric US, Inc.