5.2 Connecting inputs/outputs
When the wires are wired to adjacent terminals use ring terminals and insu-
late the wires.
<Figure 5.2.1>
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 CN2F 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 specications
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, 0.1mA
Wiring specication and eld supply parts
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.) —
THW1 — CNW12 1-2 Thermistor (Flow water temp.) —
THW2 — CNW12 3-4 Thermistor (Return water temp.) —
THW5 — CNW5 Thermistor (DHW tank water temp.) —
THW6 TBI.2 7-8 — Thermistor (Zone1 ow 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 ow 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 ow water temp.) (Option)*1
PAC-TH011HT-E
THWB2 TBI.2 5-6 — Thermistor (Boiler return water temp.) (Option)*1
D
o 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.
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