Hi all, I'm trying to get the feel of the pros, cons and otherwise of a CH question for an elderly neighbour we keep an eye on. She has an existing and fully functional CH/HW system but there is no room stat, just thermostatic rad valves (that apparently 'don't work and have been replaced once already'). Her son sets the timer up for her to give HW once per day and CH twice but I think something more 'temperature managed' might be more suitable, as she's now no spring chicken. So, the question is, 'how easy and what would be best' if we wanted to add a room stat to this setup please? Potterton Netaheat Electronic B/F CH boiler. Honeywell: Timer ST799 (or looks just like one) 3 Position Diverter Valve (L641A1005) Cylinder Stat. (L641A). Grundfos pump (that I replaced a while back with the help of some good folk here). ;-) There is also a junction box. So, would you be able to use an addon Wireless stat with this setup or to give more flexibility, would it be best to replace the Timer with one that can accept a wireless stat directly (if such exists etc). I think I understand that some of this new gear gives quick access to background CH temperatures / living temperatures etc and as long as it is reliable I can't see her needing to touch it one 'programmed (as long as she can manage the room stat etc (she's actually not bad and even uses the PC I gave her quite a bit)). ;-) Oh, whilst she's not made of money I don't think she would mind spending the right money to get something Cheers in advance, T i m

It's an easy job. Salus are the cheapest, generally £35ish, Niglon do a nice one, though I've only ever seen it in my elec wholesalers. Honeywell are the best, but double the price. They do do one with an old style dial guage (Y6630D), which is generally more suitable for older people who dont like pressing buttons and reading LCD displays. Wiring, just think of the stat as a switch, one wire in, one out, so the link from the CH on, on the programmer, goes to the stat, and where it was terminated before, goes to the other cable from the stat. With wireless you'll also have to add a permanent live and neutral to power the base station. All very simple, and they'll save around £50 a year on their gas bill typically.

In article , Davidm writes Fitting a blanking disc to the open comp end with a spare compression nut will keep you super safe for the duration of works. A couple of turns of ptfe tape on the taper mean that you only need to give it the slightest nip to make it water tight.

Old CH, new (wireless?) stat?

Oct 11, 2013 21 Replies

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T i m 12 years ago

No! What are the chances eh. ;-(

Ah, so that emulates the TRV head in it's most 'off' position. That gives me another test opportunity.

Cheers, T i m

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fred 12 years ago

In article , Davidm writes

Fitting a blanking disc to the open comp end with a spare compression nut will keep you super safe for the duration of works.

formatting link

A couple of turns of ptfe tape on the taper mean that you only need to give it the slightest nip to make it water tight.

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