PARTS NAME : HIGH TEMP. THERMISTOR
PARTS No. : PAC-TH011HT-E
<G>
SALES MODEL CODE : 7H1THR2G
WARNING
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INSTALLATION MANUAL
● Before starting installation, read the following description together with the installation manual included with the unit.
● Please read carefully and observe fully the following safety precautions.
Precautions that must be observed to prevent injuries or death.
WARNING
After installation carry out a test run to ensure correct operation, then explain operation method and safety precautions to the
end user.
Tell your customers to keep this installation manual together with the operation manual, and when they give or sell this
machine to any other person include this installation manual and operation manual with it.
Before installing any accessories on the unit ensure the unit is isolated from the power supply.
Connections must be made securely and without tension on the terminals.
All electrical work should be performed by a qualified technician according to local regulations and the instructions given
in this manual.
The flow temperature from boiler MUST NOT exceed 70 °C (*1).
Before running Floor Dry-up function, disconnect IN4 and IN5 wirings. (*2)
*1 When the temperature sensed by flow temp. thermistor or return temp. thermistor exceeds 80°C, FTC4 will detect it as overheat error.
*2 High-temperature water produced by boiler operation could flow in and this could cause a big damage to the floor.
Make sure to install the boiler that has overheat protection and output flow temperature control.
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BH79T377H02
CNP1(WHT)
TBI.1
CNV1
(WHT)
FTC 4
TBO.2
TBO.1
1
3
1
5
1
3
1
5
SW3
1
8
1
6
１
２
３
４
５
６
７
８
９
１０
１１
１２
１３
１４
１
２
３
４
５
６
７
８
９
１０
１１
１２
１３
１４
1
5
CN01
(BLK)
1
3
CN3C
(BLU)
CNBH
(WHT)
1
7
CNBC
(GLY)
1
3
CNBHT
(BLK)
1
3
CNIH
(ORN)
1
2
CN22
2 4 6 8 10 12 14
1 3 5 7 9 10 13
2 4 6 8 10 12 14
1 3 5 7 9 10 13
(BLU)
CN2F
(YLW)
1
3
CN20
(RED)
CN21
(YLW)
1
3
CNW12
(RED)
CNW5
(WHT)
1
2
1
4
1
2
TBI.2
LED1
LED2
CNPWM
(WHT)
1
3
SW2
1
8
SW1
1
8
SW4
CN108
CNRF
(WHT)
LED4
LED3
1
5
CN105
(RED)
Item
Piece
1
Boiler flow temp. thermistor (THWB1) 5 m,
color: gray
1
2
Boiler return temp. thermistor (THWB2) 5 m,
color: black
1
3
Installation manual
1
<Included items>
<Connecting boiler thermistor>
1
2
3
Heat source
Heating
DHW
Heat pump
Boiler
—
a) Heating room temperature (
)
FTC4
Boiler
Outdoor unit
b) Heating flow temperature ( )
c) Heating compensation curve (
)
FTC4
Boiler
Outdoor unit
Wireless remote
controller (option)
or
Room temperature
thermistor (option)
or
Main controller (remote
position)
Room thermostat (field
supply)
or
Wireless remote controller *
(option)
Room thermostat
* Wireless remote controller can be changed to room thermostat.
1.2 Pipe work
(a) Boiler and heat pump are connected in parallel.
(b) Install a mixing tank (field supply).
(c) Put 2 thermistors in boiler circuit. (THWB1: Flow temp., THWB2: Return temp.)
* It is recommended to protect the thermistors with heat insulating materials so as not to be affected by ambient temperature.
Note: These lead wires of the thermistors must avoid being in contact with pipe surfaces.
Boiler
Heating
Mixing tank
(field supply)
Cylinder unit/
Hydrobox
Outdoor unit
1
2
3
4
5
6
Boiler
Heating
Mixing tank
(field supply)
Hydrobox
DHW tank
Outdoor unit
1
2
7
8
9
3
4
5
6
Number
Component
1
Boiler flow temp. thermistor (THWB1)
2
Boiler return temp. thermistor (THWB2)
3
Flow temp. thermistor (THW6) (option)
4
Return temp. thermistor (THW7) (option)
5
Circulation pump (field supply)
6
Flow switch (field supply) *1
*1 For safety protection, it is recommended to install a flow switch.
Number
Component
1
Boiler flow temp. thermistor (THWB1)
2
Boiler return temp. thermistor (THWB2)
3
Flow temp. thermistor (THW6) (option)
4
Return temp. thermistor (THW7) (option)
5
Circulation pump (field supply)
6
Flow switch (field supply) *1
7
Tank water temp. (THW5)
8
Immersion heater (field supply)
9
3-way valve (field supply) *2
*1 For safety protection, it is recommended to install a flow switch.
*2 The use of two 2-way valves can perform the same function as a 3-way valve.
1. System
1) Heat source can be switched between heat pump and boiler by external input from power supplier or outdoor temperature thermistor.
2) Heat source can be switched according to running cost, CO
2
emission, or outdoor temp.
3) In case of outdoor unit failure, backup operation is possible with boiler. *1
*1 When Hybrid is selected as heat source.
When Dip SW2-5 (Automatic switch to backup heat source operation) is set to ON.
Note: FTC4 can control boiler only in space heating mode.
1.1 Room thermostat connection
IMPORTANT NOTE
Be sure to connect room thermostat to FTC4.
When boiler is running, the heating operation is regulated by the room thermostat connected to FTC4.
Room thermostat
1
2
3
4
5
6
7
8
9 10 11 12 13 14
TBI.2
THWB1 THWB2
