Owner`s manual

4.3 External sensor connection - option
Important! The external sensor must be SCI type.
Table 4.4 - N.TC. Sensor: Temperature ~ Resistance Characteristics
Temp °C
7.2 10.0 12.8 15.6 18.3 21.1 23.9 26.7 29.4 32.2
Temp °F
45 50 55 60 65 70 75 80 85 90
Res. k 115.8 100.9 88.1 77.1 67.7 59.6 52.5 46.4 41.2 36.6
The default from factory is INTERNAL SENSOR.
1. Disconnect power to the thermostat.
2. Move DIP switches 1,5 and 6 as shown in the picture below
Switch 1 - ON
Switch 5 - ON
Switch 6 – OFF
3. Connect the temperature sensor to T-T terminals.
4. Reconnect power to the thermostat.
The wire length for the external sensor can be up to 100 feet (30 meters) with
standard cable.
If the distance is greater than 100 feet then it MUST be shielded type.
There is a wide range of sensors for different applications, duct, rooms, etc.
There are also options for averaging the temperature. For details please
contact our technical line or visit our web site.
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