Hi – the previous owners installed electric underfloor heating in the bathroom, but annoyingly it will only power-up when the central heating is actually on.
In the cupboard downstairs is a junction box. There's a mains feed cable from the consumer unit. And a cable to the CH/HW controller and a cable to the boiler. The underfloor heating (UFH) feed is also run from this junction box. It seems odd to me that you'd configure the UFH to work this way, because not even the underfloor heating's programmer unit is powered unless the boiler is on – this obviously means that as soon as the boiler shuts off, so does the UFH programmer and so it resets the time etc. This configuration only works if you're happy to manually turn on the UFH each time you have a shower (and assuming the boiler is running at the time).
I want to be able to programme the UFH to come on the morning and evening regardless of whether the boiler is on.
The cables in the junction box are configured as follows:
- Mains feed: 3 core (live is connected to boiler live and CH/HW controller live)
- UFH cable: 3 core
- Bolier cable: 4 core (live is connected to mains feed live and CH/HW controller live). However, the black wire in the 4-core boiler cable is connected to another single core cable (it's actually a 3-core that someone has clipped to make a single core) - I can't trace this cable, it disappears into a corner of the wall. The point however, is that UFH live wire is also connected to this single-core instead of the mains feed live – is this single core cable a switch live?
My question is whether I can just connect the UFH live to the mains feed live in order to get around this issue where the UFH only works when the boiler is powered up.
I hope the above makes sense – would appreciate any advice.
Thanks
In the cupboard downstairs is a junction box. There's a mains feed cable from the consumer unit. And a cable to the CH/HW controller and a cable to the boiler. The underfloor heating (UFH) feed is also run from this junction box. It seems odd to me that you'd configure the UFH to work this way, because not even the underfloor heating's programmer unit is powered unless the boiler is on – this obviously means that as soon as the boiler shuts off, so does the UFH programmer and so it resets the time etc. This configuration only works if you're happy to manually turn on the UFH each time you have a shower (and assuming the boiler is running at the time).
I want to be able to programme the UFH to come on the morning and evening regardless of whether the boiler is on.
The cables in the junction box are configured as follows:
- Mains feed: 3 core (live is connected to boiler live and CH/HW controller live)
- UFH cable: 3 core
- Bolier cable: 4 core (live is connected to mains feed live and CH/HW controller live). However, the black wire in the 4-core boiler cable is connected to another single core cable (it's actually a 3-core that someone has clipped to make a single core) - I can't trace this cable, it disappears into a corner of the wall. The point however, is that UFH live wire is also connected to this single-core instead of the mains feed live – is this single core cable a switch live?
My question is whether I can just connect the UFH live to the mains feed live in order to get around this issue where the UFH only works when the boiler is powered up.
I hope the above makes sense – would appreciate any advice.
Thanks