Engineering Manual

53
PUZ-HA42NKA unit : mm (inch)
Distributor
Thermistor TH7
(Ambient)
Heat exchanger
Refrigerant
GAS pipe
connection
[5/8 [15.88]
Refrigerant
LIQUID pipe
connection
[3/8 [9.52]
Stop valve
(with service port)
Strainer
#100
Power
receiver
LEV-B
LEV-C
LEV-A
Thermistor
TH6
(2-phase pipe)
Thermistor TH3
(Liquid)
Charge plug
(Low pressure)
Charge plug
(High pressure)
HIC
Thermistor TH4 (Discharge)
COMP
Injection port
Strainer
#50
REV/N
Strainer
#100
Strainer
#100
Strainer
#100
Strainer
#100
Muffler
Ball valve
Thermistor
TH32
(Suction)
L/P SW
H/P SW
Refrigerant flow in cooling
Refrigerant flow in heating
Thermistor TH34 (Comp. surface)
P-sensor
Symbol Parts name Detail
COMP Compressor DC inverter scroll compressor (Mitsubishi Electric Corporation)
H/P SW High pressure switch (63H) For protection (OFF: 4.15MPa)
L/P SW Low pressure switch (63L) For protection (OFF: −0.03MPa)
REV/V Reversing (4-way) valve (21S4) Change the refrigerant circuit (Heating / Cooling) and for Defrosting
Charge plug Charge plug High pressure / Low pressure / For production test use
P-Sensor Pressure sensor (63HS) For calculation of the condensing temperature from high pressure
LEV-A Linear expansion valve -A Heating:Secondary LEV Cooling:Primary LEV
LEV-B Linear expansion valve -B Heating:Primary LEV Cooling:Secondary LEV
LEV-C Linear expansion valve -C For HIC (heating only)
TH32 Suction temperature thermistor For LEV control
TH3 Liquid temperature thermistor Heating:Evaporating temperature Cooling:Sub cool liquid temperature
TH4 Discharge temperature thermistor For LEV control and for compressor protection
TH6
2-phase pipe temperature thermistor Outdoor 2-phase pipe temperature
TH7 Ambient temperature thermistor For fan control and for compressor frequency control
TH34 Comp. surface temperature thermistor For protection
Power Receiver Power Receiver For accumulation of refrigerant
HIC Heat interchange circuit For high heating capacity