Mitsubishi Heavy Industries MHI FDU71VNXVF1 Technical Manual page 31

1.6 PIPING SYSTEM
Models 71, 100, 125, 140
Indoor unit
Preset point of the protective devices
Parts name
Thermistor
(for protection
overloading in heating)
Thermistor
(for frost prevention)
Thermistor
(for protection high
pressure in cooling.)
Thermistor
(for detecting discharge
pipe temp.)
High pressure switch
(for protection)
Low pressure sensor
(for protection)
(Heat exchanger)
(ThI-R1)
Service valve
Flare connecting
(Flare connecting)
Liquid line
(φ6.35)
Outdoor unit
Gas line
(φ15.88)
Service valve
Flare connecting
(Flare connecting)
Thermistor
(Heat exchanger)
(ThI-R3)
Thermistor
(Return temp.)
(ThI-A)
Heat exchanger
Thermistor
(Heat exchanger)
(ThI-R1)
Thermistor
(Heat exchanger)
(ThI-R2)
Check joint
Flare connecting
Liquid line
Service valve
(φ9.52)
(Flare connecting)
Equipped
Mark
unit
ThI-R.1.2
Indoor unit
ThI-R.1.2
Tho-R.1.2 Outdoor unit
Outdoor unit
Tho-D
Outdoor unit
63H1
Outdoor unit
LPT
Receiver
Capillary tube
Strainer
Check joint
4way valve
Strainer
High pressure
Check
switch
valve
Thermistor
63H1
(Tho-S)
Muffler
Thermistor
(Tho-D)
(Discharge)
Compressor
(Suction)
Strainer Strainer
Electronic
expansion valve
(cooling)(EEVC)
71, 100, 125, 140 model
ON 63℃
OFF 56℃
ON 1.0℃
OFF 10℃
ON 65℃
OFF 51℃
ON 115℃
OFF 85℃
ON 4.15MPa
OFF 3.15MPa
ON 0.079MPa
OFF 0.227MPa
0
- -
Electronic
expansion valve
(EEV)
'12 • PAC-T-178
Strainer
Cooling cycle Heating cycle
Thermistor
(Tho-A)
Check joint
Heat exchanger
Lower pressure sensor
(LPT)
Thermistor
(Tho-R1)
Accumlator
Thermistor
(Tho-R2)
Sub-cooling
coil
Strainer
Strainer
Electronic
expansion valve
(heating)(EEVH)
Receiver