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- Programming
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Troubleshooting
- Why is my 3iE coming on during off periods?
- What Does Heater Error mean on the 3iE thermostat?
- What does it mean if my 3iE thermostat reads “overload” on this display?
- What does “ER1” on the thermostat display mean?
- My thermostat reads error message “ER2” on the display?
- What if my Warmup thermostat screen is black and won’t turn on?
- Why is my floor not heating but there are no error messages?
- My thermostat says system is on but the floor is not heating up?
- Why can’t I program my thermostat to read air temperature?
- My 3iE/4iE thermostat reads “ER1 Out” on the display?
- Installation
- Wiring
- Miscellaneous questions
- Preparing for your project
Where do I connect the earth from the underfloor heating ?
To ensure that the underfloor heating is fully earthed, the earth wire from the heater(s) must be connected to the earth wire from the main supply.
Connect the earth using a connector or the earth connector fitted on the electrical back box.
The underfloor heating system must be protected by a 30mA RCD at all times.
