Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 608

FDU-H
Models FDU408HES-A, 508HES-A, 508HEM-A
Indoor unit
Preset point of the protective devices
Parts name Mark
Thermistor
(for protection over-
loading in heating)
Th
Thermistor
(for frost prevention)
Thermistor
(for detecting dis- Tho-D
charge pipe temp.)
Thermistor
(for detecting heat Tho-R
exchange temp.)
High pressure switch
63H
(for controlling FM )
0
High pressure switch
63H
(for protection)
Parts name Mark
Thermistor
(for protection over-
loading in heating)
TH
Thermistor
(for frost prevention)
23DH
Defrost thermostat
23DH
High pressure switch
63H
(for controlling FMo)
606
Service valve
(Flare connecting)
Check joint
Strainer Strainer
Gas line
(ø19.05)
Thermistor
(Th -A)
I
Heat exchanger
Thermistor
(Th -R)
I
Capillary tube
Liquid line
(ø9.52)
Strainer Strainer
Service valve
(Flare connecting)
Equipped
FDU308~508 (FDC308~508 type)
unit
R
Indoor unit
I-
Outdoor unit
Outdoor unit
OFF 2.5MPa (25.5 kgf/cm
Outdoor unit
2
ON 2.06MPa (21 kgf/cm
Outdoor unit
1
Equipped
unit
Indoor unit
R
I-
2
Outdoor unit
1
Outdoor unit
2
Cooling cycle
Heating cycle
High pressure switch
(For fan motor control)
4way valve
Check joint
Heat
exchanger
Accumlator
Check joint
Defrost
Thermostat
Compressor
(23DH)
High Pressure
regulator valve
OFF 68˚C
ON 61˚C
OFF 2.5˚C
ON 10˚C
OFF 135˚C
ON 90˚C
OFF 70˚C
ON 60˚C
2
)
2 )
FDU308~508 (FDC306~506 type)
OFF 68˚C
ON
OFF 2.5˚C
ON
OFF 12˚C
ON
OFF 2.5MPa (25.5 Kgf/cm
ON 1.86MPa (19 kgf/cm
Outdoor unit
Capillary tube
FDU808, 1008
2
OFF 2.75MPa (28 kgf/cm
ON 2.16MPa (22 kgf/cm 2
OFF 2.4MPa (24.5 kgf/cm 2
ON 1.86MPa (19.0 kgf/cm
61˚C
10˚C
-6˚C
2 )
2
)
)
)
)
2
)