Thermostat Connection To The Ntc Controller - Carrier SUI Installation Instructions Manual

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4 - theRmoStAt CoNNeCtIoN to the NtC
CoNtRolleR
Electrical connections: Screw terminals, wires maximum 0.9
mm². Recommended tool: flat screwdriver, maximum size 3.5
mm. a shielded cable is required for a length of 10 m.
A B C D
terminal No. User interface side
1 LEd/input 12 V d.c. – 12.5 mA
2 Earth
3 Setpoint offset
4 Earth
5 Start/stop + room temperature sensor
6 Earth
7 Only for a thermostat with speed controller: speed selector
output
8 Earth
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SUI side
Earth jumper required on-site
3 8
2 0
7
Jumper link to be placed on a
block if a return air sensor is
used with the controller to
which this thermostat is
connected.
J2 connector side of the NtC
30 m cable maximum (not supplied)
terminal No. NtC side
Com OUt/Occupied LEd
2
Earth
3
Setpoint offset input (setpoint in)
8
-
Room or return air temperature sensor
0
-
Speed selector input (fan speed in)
7
-
2 3
7 8 0
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