Wiring UFH and Radiators

[Chillidog]

Boiler: Valiant Ecotec 832
UHF (new): 2 zone mixing manifold, Heatmiser Neo Air thermostats x2, Heatmiser UH8 RF (wireless) wiring centre
Central Heating (existing): Netatmo radiator valves connected to Netatmo thermostat and boiler relay
Other (new): Two Honeywell motorised valves - 1 for CH and one for UFH

We have had an underfloor heating system installed in a new extension with two zones - not yet fully commissioned. We also have standard radiators in the rest of the house.

The wiring centre for the UFH is wireless so does not accept wired input from thermostats. This is fine for the Neo Air Thermostats but it means we can not wire in our existing Netatmo thermostat and we can not connect it wirelessly. This means that the wiring centre can control the UFH motorised valve and the boiler but not the CH motorised valve.

My question is: to control the both motorised valves can we use a secondary wiring centre and could we wire the UH8 RF wiring centre to this one instead of wiring it to the boiler and motorised valves and have the secondary wiring centre control valves, boiler etc? If so is there a specific type of wiring centre we need?

Thanks!

 

[Brambles]

You really need to provide of sketch of what you are trying to achieve, do you have stored DHW or Combi DHW?

If you only have two UFH zones you don’t need an UFH8 RF - that controls 7 UFH zones plus one wired radiator zone (Zone 8 configured not to trigger the UFH manifold pump) and wired stored hot water. For wired control, Zone 8 wireless thermostat connection is set to permanently on and the CH wired thermostat connected through the zone valve live feed.

You will only need a further control centre if you are controlling you Radiator Central Heating through more than one hydraulic zone ie. two or more Honeywell Zone Valves

 

[Chillidog]

Thanks Brambles.

I've attached a diagram of the setup.

So if I understand you correctly we can wire the CH thermostat through the Zone valve? The reason we are using the UH8 RF is because this is the only wiring centre that accepts wireless input from the Heatmiser Neo Air thermostats that we are using. We didn't realise at the time that it does not accept any wired input from any thermostats. So usually you would be able to wire the CH thermostats to zone 8 but in this case zone 8 only works with Heatmiser CH room thermostats that we do not want to use as our Netatmo thermostat is also wirelessly connected to Netatmo smart radiator valves with we want to keep.

Our boiler is a combi.

Thanks!

 

[Brambles]

If your boiler is a combi, use the DHW zone control on the UFH8 RF for your Central Heating rather than Zone 8. That ( DHW) is already configured to take a wired thermostat such as the Netatmo.

If you want to use the Netamo on Zone 8, wire it through the zone valve supply and set the wireless theomostat input to permanently closed.

 

[Chillidog]

If your boiler is a combi, use the DHW zone control on the UFH8 RF for your Central Heating rather than Zone 8. That ( DHW) is already configured to take a wired thermostat such as the Netatmo.

If you want to use the Netamo on Zone 8, wire it through the zone valve supply and set the wireless theomostat input to permanently closed.

Thanks for the help! will give that a go. 🙂