First, find another thermostat which is communicating with the UH8-RF wiring centre.
On a working thermostat connected to the same UH8-RF. In other words, if you turn the heating up, the wiring centre responds.
- Using the left and right keys, make sure that the box is over the power icon on the left.
- Press and hold tick until you see ‘SETUP’.
- Tap the tick button once. You will see ‘01’ in the top right corner.
- Press the down arrow twice, you will ‘P2’ in the top right corner.
- Press Tick.
- You will then see two large numbers, two small numbers and two letters.
- It is the large number we are interested in as this is the ‘Channel Number’ of the UH8-RF. Make a note of the large number.
- Press tick until you get back to the original screen.
(The small number is the zone which is being controlled on the UH8-RF, this will be the light which comes on and off when that thermostat calls for heat
RA is for radiator system.
UF is for underfloor heating.)
On the thermostat which has lost pairing
- Using the left/right keys, make sure that the box is over the power icon on the left.
- Press and hold tick until you see ‘SETUP’.
- Tap the tick button once. You will see ‘01’ in the top right corner.
- Press the down arrow twice, you will ‘P2’ in the top right corner.
- Press Tick
- Put in the same two large numbers as the previous thermostat.
- Press tick
- Put in the zone number using the up and down buttons.
- Press tick
- Put in UF if it is underfloor heating or RA if it is a radiator system using the up and down buttons.
- Press tick.
- You should then see the normal screen.
- If you see a house and a snowflake, press tick.
Then use the up arrow and put in a temperature a couple of degrees higher than the room temperature. Then press tick.
You should then see a flame icon on the screen and around 20 seconds later, the zone light should come on the UH8-RF wiring centre.
If that is the case, you will know that it is paired correctly.
If all of the thermostats are showing 00 01 RA in P2, you will need to get the UH8-RF opened to get the channel number.
Tip
It is worth making a note of the P2 settings on each of your thermostats and keep them as a list near your wiring centre. There is usually a sticker than can be filled out on top of the UH8-RF wiring centre. It is just in case the thermostat ever loses settings.