replace nest wireless receiver with tado wireless receiver
hopefully just a quick and easy question.
everything here refers to a UK combi boiler system (heating only)
currently i have a tado wired thermostat (along with the with internet bridge), all works fine.
possibly moving property which has a nest thermostat in place. i'd be removing this and putting in my tado system. i expect i'll need to change my wired thermostat to a wireless one (i assume they don't support both modes), and get the tado wireless receiver also.
because the wireless receiver installation instructions are only available in the app (according to tado support), and you can't see the instructions unless you have the device to add to the app, then basically i need to know if swaping out the nest wireless receiver with the tado wireless receiver is fairly straight forward and it won't require the boiler casing to be removed (which would require a gas registered engineer).
i'm more than competent doing the wiring work, assuming i can get access to the instructions.
Comments
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Instructions here. https://www.tado.com/gb-en/professional-manuals
It depends how the nest is wired in. If it’s on a digital control you’ll need either an EU wireless transmitter or an old extension kit, or you’’ll need to rewire the boiler as UK wireless receivers don’t have digital support. If it’s wired in relay you should be able to do it like for like.0 -
i had been to that link previously, and couldn't see anything that specifically referred to replacing a nest with a tado.
when you say UK wireless receivers don't have digital support? what does that mean? for a combi boiler it would essentially just be an on/off control
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Your combi boiler is capable of modulating its output, rather than just switching on and off. To do this requires a digital connection, either Opentherm or ebus. Both nest and Tado support this, or did until Tado removed support from its uk equipment.
If your boiler is wired from a digital low voltage connection and you have a uk Tado wireless receiver, you will need to rewire or buy tado kit that supports it.
If it is wired on a 230v relay connection, it will simply be a matter of unwiring the nest and wiring in l, n, COM and NO to the wireless receiver, as shown in the manual.0 -
i don't believe my current boiler or the the boiler in the new property support OpenTherm. both Alpha evoke boilers, believe it's only the e-tec versions of alpha boilers that support OpenTherm.
i believe they are both the latter, high voltage relay.
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There is a mention of it in the manual but I’d say chances are it’s more likely a relay.0
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yeah i think so, my current boiler is Alpha Evoke 30, and the other boiler is the Alpha Evoke 28
the plan, assuming it goes ahead, is to remove the nest and change it over to Tado, using as much as the tado kit that i already have.
currently have a wired thermostat and internet bridge, so looks like the only item i could keep using is the internet bridge, and would need to add a wireless thermostat and the receiver.
later on i'd be looking at adding the tado TRVs to give me more granular control over each room, i assume there should be issue doing that based on proposed tado config?
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The wired thermostat makes it even easier in the unlikely occurrence it is wired digitally - it still has digital support.
You could keep the wired thermostat and add trvs if you don’t want the expense of buying a new wireless starter kit. There will be no functional difference except the thermostat will be fixed, but unless the trvs are wildly inaccurate, they can act as thermostats anyway.0 -
using the wired thermostat isn't going to be possible based on the boiler being the kitchen (which is fairly normal in the UK), and there being no existing wired thermostat anywhere (not even an old unused one), and all the internal walls being brick so retrofitting a wired stat not being feasible.
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Fair enough. Looks like a wireless starter kit is the way to go then.0
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If I was using the tado trvs would I even need a wired or wireless thermostat? As each trv is essentially a wireless stat anyway0
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You wouldn’t need a wireless thermostat but if you wanted the trvs to call for heat you would need something wired to the boiler, either a wireless receiver or a wired thermostat.0
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yes that might be an option then, as in reality a wireless stat is only really going to be monitoring the temp in one specific room/area and isn't necessarily going to be able to judge if other rooms need heat or not.
a better solution might be to just go straight to the TRVs and try to find the wireless receiver on its own (i assume it can only officially be purchased as part of a kit), as i already have the internet bridge so wouldn't need another one of those. and just not bother with the wireless stat.
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Looks like it can be bought separately, or second hand ones occasionally come up on eBay https://uk.shop.tado.com/products/wireless-receiver1
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nice one.
i take it there is no difference between the UK and EU version of the wireless receiver? it's only the stats themselves that vary in spec?
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There are differences in the hardware. The uk version has two relay controls for Ch and hw and no digital connection, the eu version only has a relay control for Ch and a digital connection, but as you’re planning on wiring Ch relay to a combi both would work for you.0
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ah ok, so if i wanted to future proof on the basis of possibly using OpenTherm in the future i'd need to try and source an EU version with CH relay and digital.
what was thinking behind Tado removing OpenTherm support for UK devices?
there is a listing on ebay for one from Poland which is about £30 cheaper than the Tado store price. the model is V3P-EK01-TC-ML-00
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The only reason I’ve heard is that no one in the UK used it and it confused installers. Given the number of people asking about it on here that seems unlikely but there you go.
An old extension kit (serial number BU) will also have opentherm support.0 -
yeah sounds like bulls** to me.
the listing i found has it listed as this - Tado° Extension Kit BU01 (V3P-EK01-TC-ML-00). unforunately none of the images show the serial number.
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If it starts BU it will be the extension kit so will have Opentherm support.0
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this is an extension kit i've found.
which connections are the opentherm connectors?
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@Chenks76 you mentioned in your first post that you'll need to change your wired thermostat for a wireless one. Perhaps I missed an update in one of the later posts, but you don't actually need to do that. The wired thermostat can be used as both wired and wireless. You still need to purchase the Extension Kit, but you can just link it wirelessly with your current thermostat.
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@grilledcheese2 oh can you? I didn’t realise that. I thought they were 2 distinct products. How does it get power as I’m sure there is no space to use batteries in it.
I’ve managed to find an extension kit from Poland with the opentherm support (for future proofing) so hopefully that will do the job
I’ll probably be looking at adding the smart trvs at some point.0 -
The cheaper wireless thermostat will only do wireless, but the wired thermostat can be configured for either. Both thermostats run on 3 AAA batteries and the extension kit is mains powered.
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i never realised that, i assumed that as it had to be wired up to 230V then it would only work in wired mode, and the batteries were only there to to save settings (similar to a BIOS battery).
it it will also work as a wireless stat then all is good then.0 -
got my extension kit delivered today.
initially i'll be setting it up in standard on/off mode, and later i might change to opentherm (as alpha have come back and said the boiler does support opentherm even though the website says it doesn't).
I assume the opentherm connectors are the A -/+ ports?
also, are there 2 types of smart TRVs? horizontal and vertical? i've seen some listing say they are horizontal, but thought the were all the same and just the display rotated depending on how it was fitted.0 -
You’re more or less correct on Opentherm - it’s - and + (not A). Tado used to sell directional trvs but now the current models can be used in either position.0
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ok, i'm about to pull the trigger on the putting in the tado smart TRVs now.
got 5 radiators (marked in red in the image below), but only 3 will be getting the smart TRVs (hallway rad is the "master" rad with no TRV, and the bathroom rad is getting replaced with a towel rack but that won't need a smart TRV on it).
so that leaves lounge, bedroom and office.
at the moment i just have my existing wireless stat in the living room.
so once i replace the TRVs, what will i do with the wireless stat, as essentially that will become redundant? the stat is currently in the lounge (marked in green on the image below). i have the EU extension kit wired to the boiler.
also, how good are the TRVs at measuring the room temperature, as the position of them isn't ideal and the temp right at the rad is always going to be higher than the ambient room temp. i have quite high ceilings which means rooms often take longer than normal to get up to desired temp.
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Your wireless stat in the lounge won't be redundant. You add the new TRV to the lounge in the app so that both devices are in the same room. The temperature sensor in the TRV will be disabled as the wireless stat will continue to measure the room temperature.
If you wanted to have more accurate temperature control in the bedrooms you can add wireless stats to these rooms too.
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but isn't the point of the TRV is that it measures the temp itself, meaning i wouldn't then need the existing wireless stat in the room? or is keeping it there only to allow a more accurate room temp compared to the TRV temp sensor?
also, other than using the tado app to add the devices, i don't use the tado app for anything, i do everything via iOS Home app (Homekit), i assume this won't be an issue after adding these?
the existing wireless stat is currently set as a zone controller (according to the tado app).
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