20
4.5 Connecting inputs/outputs
For multiple outdoor units control with FTC4 (Slave), see section 9.
4. Electrical work
When the wires are wired to adjacent terminals use ring terminals and insu-
late the wires.
4.5.1 Signal inputs
Name Terminal block Connector Item
OFF (Open)
ON (Short)
IN1
TBI.1 1-2
—
Room thermostat 1 input
Refer to SW2-1 in <5.1 Dip Switch Functions>.
IN2
TBI.1 3-4
—
Flow switch 1 input
Refer to SW2-2 in <5.1 Dip Switch Functions>.
IN3
TBI.1 5-6
—
Flow switch 2 input (Zone1)
Refer to SW3-2 in <5.1 Dip Switch Functions>.
IN4
TBI.1 7-8
—
Demand control input
Normal
Heat source OFF/ Boiler operation *2
IN5
TBI.1 9-10
—
Outdoor thermostat input (*1)
Standard operation
Heater operation/ Boiler operation *2
IN6
TBI.1 11-12
—
Room thermostat 2 input
Refer to SW3-1 in <5.1 Dip Switch Functions>.
IN7
TBI.1 13-14
—
Flow switch 3 input (Zone2)
Refer to SW3-3 in <5.1 Dip Switch Functions>.
*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts may be reduced.
*2. To turn on the boiler operation, use the main controller to select “Boiler” in “External input setting“ screen in the service menu.
Item
Name
Model and specifications
Signal input
function
Signal input
wire
Use sheathed vinyl coated cord or cable.
Max. 10 m
Wire type: CV, CVS or equivalent
Wire size: Stranded wire 0.5 mm² to 1.25 mm²
Solid wire: ø0.65 mm to ø1.2 mm
Switch
Non-voltage “a” contact signals
Remote switch: minimum applicable load 12V DC, 1mA
Wiring specification and field supply parts
4.5.2 Thermistor inputs
Name
Terminal block Connector
Item
Optional part model
TH1
—
CN20
Thermistor (Room temp.) (Option)*1
PAC-SE41TS-E
TH2
—
CN21
Thermistor (Ref. liquid temp.)*2
—
THW1
—
CNW12 1-2 Thermistor (Flow water temp.)
—
THW2
—
CNW12 3-4 Thermistor (Return water temp.)
—
THW5
—
CNW5
Thermistor (DHW tank water temp.) (Option)*1
PAC-TH011TK-E
THW6
TBI.2 7-8
—
Thermistor (Zone1 flow water temp.) (Option)*1
PAC-TH011-E
THW7
TBI.2 9-10
—
Thermistor (Zone1 return water temp.) (Option)*1
THW8
TBI.2 1-2
—
Thermistor (Zone2 flow water temp.) (Option)*1
PAC-TH011-E
THW9
TBI.2 11-12
—
Thermistor (Zone2 return water temp.) (Option)*1
THWB1 TBI.2 3-4
—
Thermistor (Boiler flow water temp.) (Option)*1
PAC-TH011HT-E
THWB2 TBI.2 5-6
—
Thermistor (Boiler return water temp.) (Option)*1
Do not splice the wiring to extend or shorten it, or this could affect correct monitoring of each temperature.
If the wiring is too long, bundle it with a strap to adjust the length.
*1. The maximum length of the thermistor wiring is 5 m.
When the wires are wired to adjacent terminals, use ring terminals and insulate the wires.
*2. Except PAC-IF052B-E
TBI.1
2 4 6 8 10 12 14
1 3 5 7 9 11 13
2 4 6 8 10 12 14
1 3 5 7 9 11 13
FTC 4
TBO.2
TBO.1
1
5
SW3
1
8
1
6
1
5
CN01
(BLK)
1
3
CN3C
(BLU)
1
3
CNBHT
(BLK)
1
3
CNIH
(ORN)
CN20
(RED)
CN21
(YLW)
1
3
CNW12
(RED)
CNW5
(WHT)
1
2
1
4
1
2
TBI.2
LED1
LED2
SW2
1
8
SW1
1
8
SW4
CN108
CNRF
(WHT)
LED4
LED3
1
5
CN105
(RED)
2
4
6
8
10
12
14
1
3
5
7
9
11
13
2
4
6
8
10
12
14
1
3
5
TBO.3
2
4
6
1
3
5
7
9
11
13
FTC4 (Master)
<Fig. 4.5.1>