Comfortheat ETN4 THERMOSTAT Wiring Diagram

Contents hide

1 Comfortheat ETN4 THERMOSTAT

2 WIRING OF ETN4 THERMOSTAT

3 WIRING OF ETN4 THERMOSTAT AND CONTACTOR

4 REFERENCE:

Comfortheat ETN4 THERMOSTAT

Comfortheat-ETN4-THERMOSTAT-PRODUCT

WIRING OF ETN4 THERMOSTAT

Heating load less than 3600W

Comfortheat-ETN4-THERMOSTAT-FIG-1

ETN Thermostats & C-Bus Control
The ETN thermostat is suitable for din-type switchboard mounting. The connections to the thermostat are:

Terminal 1 – 230V (L) Power
Terminal 2 – Neutral (N)
Terminal 3 – Temperature Setback – Output
Terminal 6 – Temperature Setback – Input
Terminal 4 – Heater 230V – Output
Terminal 5 – Heater Neutral – Input
Terminal 3 – Frost Protect – Output
Terminal 7 – Frost Protect – Input
Terminal 8 – Floor Sensor
Terminal 9 – Floor Sensor
Terminal 10 – External Room Sensor
Terminal 11 – External Room Sensor

C-Bus Control
To turn the floor heating On/Off (no daily control) the C-Bus can be used to switch the power supply to the ETN4 thermostat by breaking the 230V power supply to terminals 1 & 2.
For daily control close terminals 3 & 6, which will set the thermostat into setback mode (i.e. a lower temperature).

Cable Extension
You can extend the sensor cable with a TWIN wire – Max Length 100m or similar

WIRING OF ETN4 THERMOSTAT AND CONTACTOR

Where the floor heating load exceeds 3400W a contactor needs to be installed

Comfortheat-ETN4-THERMOSTAT-FIG-2

ETN Thermostats & C-Bus Control
The ETN Thermostat is suitable for din-type switchboard mounting. The connections to the thermostat are:

Terminal 1 – Power 230V [L]
Terminal 2 – Neutral (N)
Terminal 3 – Temperature Setback – Output Terminal
6 – Temperature Setback – Input
Terminal 4 – Heater 230V [L] – Output Terminal
5 – Heater Neutral [N] – Input
Terminal 3 – Frost Protect – Output Terminal
7 – Frost Protect – Input
Terminal 8 – Floor Sensor – no polarity Terminal
9 – Floor Sensor – no polarity
Terminal 10 – External Room Sensor Terminal 1
1 – External Room Sensor

C-Bus Control
To turn the floor heating on/off (no daily control) the C-Bus can be used to switch the power supply to the ETN4 thermostat by breaking the 230V power supply to terminals 1 & 2. For daily control close terminals 3 & 6, which will set the thermostat into setback mode (i.e. lower temperature). The C-Bus programs setback times. (Refer to ETN4 User Manual)

Contactors
If the heater load is greater than 3600 Watts or 16A, these terminals can be connected to the contactor coil to drive a contactor.

Cable Extension
You can extend the sensor cable with a TWIN wire – Max Length 100m or similar

Comfortheat-ETN4-THERMOSTAT-FIG-3

NOTE: The earth screen of all heating cables is to be connected to EARTH ComfortHeat Australia Pty Ltd 8/11 Ponderosa Parade Warriewood NSW 2102
p: 02 9979 8600 [email protected]

www.comfortheat.com.au