Specifications
996
FDC-HKXR
Heat exchange
thermistor
(Th
1-R)
Intake Thermistor (Th
1
-
A
)
ø15.88
(5/8")
SVC
SVH
SVL
SVG
SVC
SVH
SVL
Liquid
piping
ø12.7
(1/2")
Discharge gas
piping
ø19.05
(3/4")
Service
valve
(with charge
port)
Check
joint
Flange
DPR
2
DPR
1
20SS 20SL
SVS SVL
DPR
3
20
VF
20
VU
DD
63L
SV
3
SV
2
SV
1
63H
2
63H
4
63H
3
63H
1
E
SC
(LP)
Intake gas piping
2001 : ø25.4
2501 : ø28.58
4-way valve
(For before heat exchange)
4-way valve
(For after heat exchange)
Brazing
Brazing
Flare connection
Sub-cooling coil
(Discharge)
Oil separator
Accumu-
lator
(Release)
Service
valve
Full
load
Partial
load
Capacity control solenoid valve
Check joint
(liquid)
Check joint
(HP)
Outside tempera-
ture thermistor
(Th
O-A
)
Heat ex-
change
ther-
mistor
(Th
O-R
)
Discharge
piping
thermistor
(Th
O
-
D
)
Service valve
(With charge port)
Compressor
Receiver
(with charge
port)
Flare connection
Dome bottom thermistor
(Tho-c)
Brazing
SVG
FDE series have external installation
as the expansion valve box.
ø9.52
(3/8")
Air heart-
exchanger
Electronic
expansion valve
Strainer
Indoor unit B
( )
( )
(Suction)
Fusible plug
Strainer
20.2.5 Piping System
Models FDCP2001HKXRE2, 2501HKXRE2
(3) Function of thermistor
Th
O-A
: For low outside air cooling/heating, frost removal control
Th
O-R
: For frost removal control
Th
O-D
: For Discharge piping temperature control
Th
O-C
: For dome bottom temperature control
Th
I-R
: For fan control during heating
For frost prevention during cooling
(4) Flow divide controller solenoid valve action chart
SVH
SVC
Closed
Closed
Power
supply
OFF
Closed
Open
Power
supply
ON
Closed
Open
Cool-
ing
(1)
Open
Closed
Heat-
ing
(1)
Closed
Open
Blower
Closed
Open
Detrost
Note (1) Including for pauses, stops, and errors.
(2) Preset point of protective devices
63H
1
: 3.24 open, 2.65 closed MPa (33 open, 27 closed kgf/cm
2
) [for protective]
63H
2
: 2.26 open, 2.84 closed MPa (23 open, 29 closed kgf/cm
2
) [for high-pressure control (Hz decrease)]
63H
3
: 2.50 open, 2.11 closed MPa (25.5 open, 21.5 closed kgf/cm
2
) [for high-pressure decrease control]
63H
4
: 1.67 open, 1.86 closed MPa (17 open, 19 closed kgf/cm
2
) [for high-pressure increase control]
63L : 1.96 open, 2.75 closed MPa (20 open, 28 closed kgf/cm
2
) [for low-pressure increase control]
DPR
1,2
: 1.77 open MPa (18 open kgf/cm
2
) DPR
3
: 2.35 open MPa (24 open kgf/cm
2
)
(1) Solenoid valve operation chart
SV1
20VF
20VU
Full load
During compressor capacity control
Partial load
-
Open
Closed
-
Closed
Open
Open
-
-
During
discharge
temperature and
dome bottom
temperature
control
Note (1) The solenoid valve is open during magnetic induc-
tance and closed when there is not magnetic induc-
tance.
Indoor unit A
Flow divide controller
Outdoor unit Refrigerant flow Cooling Heating
To the units in the following
order. (A maximum or 8 units
can be connected.)