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Hi @Harry Bloomfield Just checked the manual for the PIR and it notes the photocell range is 100 to 1000 lux, and inactive.

Hi @aptsys , thanks for your reply. I have already bought the fan which has a timer built in. Had I thought/known that this and the PIR would clash over the timer, I would have purchased the non timer version. I did think early on in this thread to have the PIR set to 10secs then set the fan to...

Hi @EFLImpudence , Here is my updated drawing. I didn’t include it earlier as I was waiting on your responses to my questions so I could amend the drawing if needed. One question I have is with regards to the PIR & fan switch lives. Am I correct in thinking that although it’s the PIR that...

@EFLImpudence could I still use the fan isolator now that I have already got it? If so would I be correct in thinking I can just run a twin and earth to L2 (permanent live) and N. And leave out L1 (switched live) on the supply side. And then from that head off to the PIR, fan and demisters? I’ve...

Revising this thread as I’ll soon be able to make all connections for my PIR controlled extractor fan and mirror demister. Does this wiring diagram look correct?

My UFH pump (on the manifold) wired into a controller which sits just above. This then goes to an S Plan wiring centre which is what links all the other components together.

Thanks, that was exactly what I've been looking at this morning but couldn't find one in the sizes I need. Think I'll take a trip to a different merchants on Weds and see if they have anything there.

would you happen to have a link for one? Been searching online, been to the plumbers merchants and can't seem to find something. Not fussed what it looks like, this is all just temporary till the kitchen gets redone then I'll redo it all properly.

Hi all, Got a branch coming off my soil stack which is 50mm push fit, this one, https://www.wolseley.co.uk/product/geberit-silent-pp-875deg-branch-fitting-110-x-50mm/ And the existing kitchen waste is 40mm solvent weld, so an OD of approx 43mm. Can anyone suggest an adapter I could use that...

Is it possible to swap the tray for one that has the drain in a different position?

Managed to get some pics of the isolator I'll be using and the wiring diagram Scolmore provide. Am I correct in thinking, L1 on the load (top row) is live feed in from my lighting circuit, then L1 on the supply (bottom row) is my permanent live to the PIR? I can confirm tomorrow but I think...

@flameport Just checked the spec on the PIR and looks like the minimum time I can set is 10s, so m I could set it for that and then base the length of time I require on the fan. I'll check through the fan specs tomorrow when back on site. Also to throw something else in the mix.....could I have...

@flameport any issues with having a fan with timer? I’ve already got the fan. Also can anyone help with wiring this up? Done extractor fans in the past off the lighting circuit but never had one run off a PIR. I’ve got the extractor fan isolator at the moment of the lightning circuit and then...

Hi all, Looking to have my bathroom extractor fan turn on via a PIR instead of on with the light switch. Main reason for this is the bathroom gets lots of light in during the day and if showering at that time there's no need for the light, and so an extractor fan wouldn't turn on. I also have a...

Has anyone any experience with fitting 2 cylinder stats to a buffer vessel to increase the volume of water being measured? I'm installing a buffer vessel as part of my UFH installation to work with an external oil boiler, however trying to work out if this is worth the extra effort over...

Thanks for you reply. I've attached an updated version of the wiring which I believe now to be correct and have omitted the zone valve. Still has the earths and neutrals but I have also shaded brown over any cables that will be live to indicate sleeving to be used. It now makes more sense to me...

Hi, tbh the zone valve was advised to me hence it being in place. With regards to the pumps, I assume the combi already has one (there isn't an external one fitted at present and the system runs fine albeit with radiators), and the manifold now, and in the future when the ground floor gets UFH...

Hi all, So I've sorted my plumbing out. A little bit different from before in that I've now removed the zone valve before the manifold and have introduced one to be between the buffer and boiler only. I'm thinking of having 2 sets of heating flow and return tapped into the buffer so I have a...

Thank you for the responses. It's certainly helping me get my head around S plan wiring. My rough drawing of the UFH system for the first floor is here and the wiring diagram for the Wunda wiring centre I'll be using is So where I'm still struggling to make sense is this wiring centre will be...

Thanks to whoever moved my thread across, was just about to ask if this could be done. Plumbing wise, I've got a 22mm flow and return going to a buffer vessel from the external oil fed combi boiler. Then a 22mm flow and return going up to the upstairs UFH manifold. On the flow side before it...