Ricey3509 wrote: » I'm about to pull the trigger on a Tado setup and I'd like a steer if what I've planning makes sense. I've currently got a single nest controlling the rad's and hot water, can I just order the wireless starter kit and replace the heat link with the Tado wireless receiver? We've currently got 10 rad's in the house. 3 are in the main living space (open plan) and 2 are towel rad's in ensuite/main bathroom. A couple of questions: - should I put Smart TRV's on the towel rad's? - in the main living space, should I put smart trv's on every rad or just one? Thanks!
DubDani wrote: » I am considering investing in a Nest or Hive system. We have 2 Zones, downstairs (5 rads) and upstairs (6 rads) plus hot water. At the moment we have the central (EPH) control unit in the kitchen and two thermostats, in one of the downstairs living rooms and one in the main bedroom upstairs. Would we replace all three Units or only the two thermostats? If the latter, what wouldn we do with the current central control unit in the kitchen? Remove it or leave it? Don't really fancy a hole in the tiled kitchen wall. �� Any thoughts much appreciated, incl. which system might be best suited etc.
deezell wrote: » If the stats are wired to the EPH, 2 Tado wired smart stats would be your best solution, leaving the EPH to time HW, with the EPH CH zones now set to always on as the timing function shifts to the Tado stats. If you want HW control on the Tado app also, Tado ext kit will fit over the old EPH location, with one wired Tado stat and one wireless Tado stat replacing the old ones. HW and CH for the one wireless stat are switched in the Tado ext kit receiver, and together with the second wired Tado stat will provide the 3 zone switched live to the existing EPH cables. Hive stats are wireless, so two hive stats would each have a receiver, one of them with CH and HW control. Both receivers could be wired in place of the existing EPH, not the tidiest solution, or the receivers could be located beside the zone valves and wired directly, leaving the retired EPH to cover the hole. Same for Nest, the heatlink receivers sited next the valves, they would be untidy looking if you placed them where the EPH was, as you need two, one for each wall stat. The Drayton wiser 3 channel kit is ideal for this job. Two wireless stats, and a single 3 zone receiver which will fit right where your EPH was, directly wired in its place, with the old wall stats either turned up full or removed and their wires linked together.
DubDani wrote: » Thanks for that. Much appreciated. I think the Drayton Wiser covers what I am looking for and seems to be an easy enough install. Also good value on Amazon at around £160. One question. Will the Drayton also let you set a schedule for the hot water? Read somewhere that it only let's you switch it on/off via the app, but not set a schedule.
DrPhilG wrote: » So Amazon have a kit with 1 room stat and 2 TRVs for £199. Then I can buy an extra room stat for £80 so £280 all in. Or there is a kit with 2 room stats but no TRVs. But it's only £160, then I can add 2 TRVs at £40 each - £240 altogether. Am I missing something?
mcgragger wrote: » I've got a baxi boiler with two wall stats and 2 actuator valve controllers in the hotpress beside the cylinder. Would the Drayton work with that? I'm a sparks so ok with wiring however plumbing isn't my strong point. Is it just a case of replacing actuators and timer on boiler. Id really like to modernise the heating controls but never get around to it
deezell wrote: » No, though the UK price of £161.04 plus £80 jumps by an extra £11 for ROI delivery, about 25.5% added instead of Irish VAT if 21% which would only add £2, it's labelled as 'Import fees deposit'.
deezell wrote: » I assume you have 2 CH zones, two stats opening the two motorised valves. You have a HW cylinder. Your HW cylinder must be gravity heated or pumped. HW heats once the boiler fires for CH or can you set it for HW only. Is there a timer anywhere in this? Does this control HW timing as well as CH timing? Are the wall stats electronic with display, or just mechanical twist ones? There are a few different configurations possible when not all zones are valved. You wont have to remove the actuators, but you will need to see if their built in boiler relays are wired to fire the boiler when actuated, or if they just open dumb on live from their wall stats, and the boiler is fired by a different live source, a single pin timer or maybe a wall heating controller. Add a few images if possible.
mcgragger wrote: » Cheers I will get a few images today. The timer is on the boiler anyway - its the standard mechanical inbuilt timer with the little dipswitches.
DrPhilG wrote: » Ahh, but this isn't for me at all. No idea where you got that impression. This is all for my aunt in Derry.
deezell wrote: » And you only live 5km away!
DrPhilG wrote: » Hopefully won't need the extender plugs but no harm in adding them. Can always return if needed. If I take the old control off, would you know if I'm likely to need a spark for anything or if its straightforward? The plumber is going to add a new valve I think for the water.
deezell wrote: » I can see the post motorised valve tap into the downstairs CH circuit from the pump. This I presume is the stove pump. I presume that is the stove HW cylinder circuit with the orange pipe stat on it. This triggers the pump when the hot gravity flow from the stove exceeds a threshold, prior to which it just dissipates heat into the cylinder. I assume that rising inch pipe to the cylinder is the same one which is tapped off to the top side of the pump, pushing hot stove flow through a non return one way valve, visible bottom right of the pump, and into the ground floor CH circuit. Its possible also that the valves and pump are operating on the return flows from the CH and HW, I can't see the flow direction mark on the pump or on on the NR valve under it, but it will work equally well.
deezell wrote: » Those Myson valves have grey/orange wire relay connections for firing the boiler, is there a wiring box nearby where they, and possibly the stove pump+stat wiring terminate? You can check if the grey/orange wires are terminated.
deezell wrote: » You would indeed need to have some open radiators on the circuit, if the stove output exceeded the ability of the HW cylinder to sink heat. Strictly speaking, these would ideally be gravity also, often a single top floor one, fed through a thermostatic operated flow valve, which woul open stove flow for gravity connection to some open upper floor rads, regardless of a power outage. Something like this may already be in place, explaining the mild heating of upper floor rads from the stove.
deezell wrote: » With a fairly powerful stove, it is a good idea to have a relay which cuts the SL to the oil boiler when the stove is supplying sufficient heat to the CH. The smart stats will still call and open the valves, but the oil boiler will not fire until the stove heat drops before a threshold. A very simple method to implement this is to wire the NC terminal of the stove stat to provide the live in to the grey wires of the valve relays. If the stove is operating at a high enough temperature to bring in the stove stat, the NC terminal goes to 0, so SL is unavailable to the oil boiler via the valve relays until the stove stat closes when the stove heat reduces. Its not ideal with your plumbing as the stove flow is connected post valve to the downstairs CH circuit only, but if both valves happened to be called by the new controller receiver, and various TRVs were open, the stove HW could reach upper as well and lower floor rads, quickly dissipating the stove heat first which would close the stove pump stat and return power to fire the oil boiler as normal. This entire addition to your new wiring would require a single wire from that orange stat to the wiring box for the zone valves, so it would be very simple to implement, or bypass. That's enough info to wreck your head for a while. Off you go and Get CHexit Done!
Anyone know what is difference in the Drayton Wiser for a conventional boiler and combi boiler?
DrPhilG wrote: » Also what would you say is a reasonable time frame/rate for the spark to wire up the 3rd stat and fit the control hub? Day? Half a day? 3 weeks plus overtime lol?
deezell wrote: » I note you opted in the end to install a single CH zone kit and some TRVs, thought you have two CH zone valves.
chris_ie wrote: » Your setup looks exactly like mine DrPhilG, did we have the same plumber/electrician during the build? I'm plan on doing the same, new controls and add HW zone. Are your wall switches and programmer far from (same floor?) where your valves are?
DrPhilG wrote: » Eh?? Its the Drayton Wiser Kit 3. 2 channels plus hot water.
DrPhilG wrote: » Eh?? Its the Drayton Wiser Kit 3. 2 channels plus hot water. Jeez man you're worrying me, have I bought the wrong gear?