Great video, clear and concise.....well done and thanks!! One point to note for those doing this for the first time: I had an issue with the hot water always being on and after research found that the Bacterial Prevention setting was on, which turns the hot water on if it hasn’t been on for a while. Obviously on a new install it thinks it hasn’t been on for a while. I turned this off and it works fine now!! A note to anyone having the same issue!!
Great video with a follow up question: How to best to connect a Nest 3rd gen to Zone 1 (boiler) and A/C system (furnace in house is used exlusively for cooling). Seems somewhat obvious, however, just wanted to verify that I am not over looking a potential problem.
Thank you for this video! Your clear instructions enabled me to fit 2 Nests which I've been putting off for months because I had no idea how my new home/boiler was setup. Wish I'd found your video earlier 😄
I also have a new build but have issues of no power to the thermostat. Works fine when I plug it into the wall. I have a combi boiler with 2 zones heating only. Only fitting nest to down stairs zone
@@bradshoesmith5084 So the Nest thermostat's USB plug powers it fine? But when you use the 2 wires into the back instead that come from the boiler it doesn't power it?
Thanks for the video, mine has 2 thermostat controls (Danfoss TP5000) with 4 wires each. 1 Earth 1 Live 1 Neutral 1 Switched. The switched went from terminal 3 on the nest to Brown on the valve like you said. Thanks. 👍🏻
Fantastic thanks a lot 🙏 you save my life Wished you would have put both nest thermostat on to see if the light came on If it was combi boiler then it would have been bingo
Absolutely fantastic video. Very clear and looks easy to follow. I've switched Combi boiler single zone thermostats before but I'm buying a house with a system boiler and 2 zone. Thanks for explaining clearly. It'll save me a lot of working out
A note of sincere thanks for this video, I installed 2 x Nests in a heat-only system / boiler dual zone home (done several Gen1's with Combi's in the past w/o issue - system boilers are more involved). 1st main stat was a doddle thanks to the video, with 2nd zone one, though technically simpler than the 1st, taking longer as the 2nd clock was battery operated (no mains) so I needed to rethink the heatsink locale (where I'd pre-planned & agreed it) - just as per one of the examples in the video but needed to utilise 2 wires therein for the 12v nest p/s & which were not in terminals that I expected (expected common to be live and switched to be o/c but it was the other way around - but this didn't really make any difference to the install once I'd traced them in the wiring junction box to re-purpose & then took wires off from there to the new heatsink locale. Of course, I discovered other unrelated issues with the system (no pressure, rad's that needed bleeding - but without pressure, they didn't bleed well of course; loss of pressure was 2 poss 3 rads which had leaked in the past & so didn't want to normalise pressure until the rads leaks had been resolved (as under higher/normal pressure, the rad's would continue to leak - they may well do when they warm up anyway. The system also needs balancing too as at one point when pressure was normal & apparently no bleeding required then, 2 rads remained cold on full tilt / try's open etc & in the same zone. Anyway, the Nests are working a treat and this video helped me get it straight in my head before I opened the nest boxes - so a million thanks. I have my own home to do soon - which I think is a similar set-up so again thanks for that too!
thanks for this video! managed to get my 2 zone nest system set up and running in a few hours, it would have been faster if the terminals weren't so small!!!
@@UrbanPlumbersThanks for sharing your advice & knowledge is very helpful! You mentioned at the start of the video about doing an UFH video in the future? Did you create that video? what do personally recommend for a dual zone plus water, gas fed via Ideal Logic IE boiler - Underfloor heating? Dual manifold with stats in in each room. I would like to control the boiler, water timer and floor heating master control as each room is controlled by fairly nice, touch screen stats in each room.
If we have two zone programmable thermostats and a combi boiler (new build) Do we need to install 2x Nest heat-links or can we simply remove old programmable thermostats and fit 2 new Nest thermostats using the same wiring?
Would it be easier to wire a 5 core flex to the heat link from the wiring centre? Then you’d a neutral connection, L connection, 2 can be joined with permanent live in the wiring centre, 3 can be joined to the brown of zone valve & earth connection connected up. Would that be an easier option instead of installing a link between L & terminal 2? The cable connection points are so small it’s difficult to get two cables in
Hi I have a two zone system with system boiler but I have two system programmers only one wireless thermostat the other rads in zone 1 run off thermostatic valves presumably I'll remove both programmers and replace with two heat links as long as I set one up as combi boiler and the other with the hot water as a system boiler going through the cylinder thermostat that would work?
hi, could you please explain if i have a system boiler with 4 zones, how do i set it up. Which thermostate would be setup as system and which as combi? Thanks.
Hello. Many thanks for the video and the explanation. Tell me. Is it possible to have two nest thermostats connected to a a single heatlink on a combination boiler. ?
Hello, very good video.I have a question, can you control the 2 zone heating (downstairs and upstairs) and External hot water tank without having installed 2port zone?instead I have a Dab pump on each zone which has only 3 wires. Can the nest thermostat control the pumps independently and tell the boiler when to stop? What diagram should I follow form the booklet nest thermostat? Thank you!
I have a single programmer that currently can turn on upstairs, downstairs and hot water independently. Is it possible to mimic this with a single nest link or will I need two?
Thank you for dual zones wiring installation videos, I would appreciate it if you could upload a video for an underfloor wiring center and nest thermostat installation for radiators to combi boiler.
That would be tricky - as there is too many variations of UFH wiring centres and ways to wire the system. It would be much better if I did a video explaining principles of controls so if you learn it you can then wire any system.
@@UrbanPlumbers I am in the process of wiring Aura underfloor heating wiring centre and nest for radiators, boiler make is Baxi platinum 40kw. Underfloor heating wiring centre has only switch wires which need to be connected somewhere to trigger the boiler, we also need to have an additional nest system working independently for radiators. Not sure how both are going to work independently.
thanks for this video and both S and Y videos, I am trying to figure out installation of nest 3rd gen with District heating, I have two thermostats for heating (one upstairs and one downstairs), the District Heating boiler in the garage with froststrat, and upstair a wiring board with two valves in the airring cupboard, would be great to get some advice or which video to follow
Great video, very informative. When using a nest on a three zone system ie, downstairs, upstairs and Hot water , can you control Hot water from both of the thermostats or only one of them.
Nice vid. Question: my hot water is totally separate system. So can I use the 4/5/6 outputs to control second heating zone with temperature read from room sensor? So I will then only need to buy one nest/heatlink to control two heating zones?
Great video. Thanks. 1 question. I have this set up but the thermostat that controls heating and water is also connecting wirelessly to the second heat link and is therefore activating both heating zones. Is there a way of stopping it connecting to the 2nd heat link?
Great video, thank you, I have a 2 zone combi boiler, I’ve looked in my wiring panel and I have the live - neutral - earth from both valves, but I only seem to have 1 live and neutral coming in for the programmers ? Is this normal? I can’t seem to add a photo to show it. Thanks in advance, Carl
So if the current thermostat is in a bad position just above a radiator then what options do I have if buying a Nest one. Can it be moved? What happens to the old wires?
Hello, great video! I have 3 wirless thermostats for three zoned floors - am i correct in thinking that I could add an extra heat link for the 3rd zone and use thermostat stand to satisfy my requirements - do you see any issues with this?
Hi Can you have multi zone open therm if you boiler is compatible If so would both heat links run wires from OT 1 and 2 up into the boiler and connect to the same place Thanks
Has anyone had problems adding 2 stats ( Nest gen 3 and Nest thermostat E) to the same home account. Mine just comes up with a fault code, only way to do it is open second home account on the app and add second stat. Not ideal but only way I could get it to work.
Hi, brilliant video! If using a combi boiler and wanted to zone just the towel rail could I use the hot water as the zone for the towel rail and just have no thermostat on it? Meaning I’d just need the one nest.
Brilliant video! Everything was explained perfectly. I do have 1 question though, I have a combi boiler with no water tank and a dual heating system. The boiler has a black and a grey wire which I have traced back to the zone 1 controller. Do I completely disconnect these 2 wires and put a link wire between the terminals? They are labelled on the boiler as ‘room stat/timer’. I have read the manual for the boiler and it looks like there is a link wire between the terminals from the factory.
Hi mate, I have a job where there is 2 heating zones but they only want to control 1 zone via nest (s plan) would the wiring in the wiring centre stay the same for the heating zone they don’t want the nest on?
Are you serious? After I have done tons of videos explaining how to install Nest on all common plans, you want me to explain in the comments sections - again? Erhhhh - NO!
Thanks for explaining the jumper links from active to common. I had assumed that that link would be made inside the unit. No matter. My question concerns inslab wired heating. Will I use connections 2 and 3? I explain to myself that the nest thermostat will stop and start the power via the heat link's relay. So many questions.
Hi there, I have a dual zone heating system with a hot water cylinder. I have hot water and zone 1 wired to thermostat1 and zone 2 wired to thermostat2. Is there anyway of controlling water from both thermostats ? Or jsut thermostat 1 ?
@@UrbanPlumbers amazing quick response ! Thanks for quick confirmation. One last question though. Why can't I select system boiler for both thermostats ? Why does 1 need to be system and the other combi ?
@@eamonnmcgurk1671 why would you even consider having 2 nests controlling water? Too much unnecessary wiring, 2 schedules sending to signals to one zone valve, you have to set 2 schedules identical anyway. Makes no sense at all. Also you will control hot water from your phone anyway so what the point ? If you maybe had 2 hot water cylinders with independent controls this would make some sense. Why would you want to do it anyway ?
@@UrbanPlumbers it's not a huge issue for me. But as one of the most expensive "smart" thermostats you can buy. It doesn't work with google home assistant (to control water on/off) and if your phone is dead, the only way to turn on the water would be to go to the specific thermostat which is connected to the water control. Would be nice to control it from either thermostat as well as Google home assistant.
Hello We have managed to set up our two nests on an on/off combi boiler and when we tested them, we’ve confirmed that each heat link is connected to the correct thermostat and that the correct valve operates for each heat link respectively. However, when we had the upstairs thermostat set to 15deg (eco) and downstairs set to 23deg, all of the radiators in the house were on and upstairs heated up to 23 degrees as well as downstairs. Any suggestions on what might be happening please?
zone valve could be faulty - it does not open but the ball inside is snapped off so it is still passing water. Rare fault but it does happen. Before replacing make 100% sure that upstairs zone valve does not open.
@@UrbanPlumbers thanks for your response. Both valves are operating, we can hear them opening and closing. When the heat links are in manual, the valves operate correctly but as soon as we try to control them with the thermostats it doesn’t work correctly
Do you need to link, or could you take another spare live feed from the wiring centre to terminal com 2 and terminal com 5 or does the link from Nest L communicate with com2 and com5
@@UrbanPlumbers so If I had 2 spare live connections in the wiring centre, I could run cable from them to com2 and com5 and not need the link cable. Thanks!
Thank you so much for this video, ive liked and subscribed - really helpful. Just one quick question - if ive mixed up the Nest with the valves is it just a case of swapping the wires from terminal 3 to the brown wires in the wiring system? thanks again
Brilliant video, I have done my best to follow it but am struggling with the power supply to the boiler. Does the boiler get a permanent power supply? Not sure how the nest controls the boiler??
Hi great video. If I have a two zone heating + HW and I only want to replace the downstairs zone with a nest I would have to leave the existing programmer in place for the other zone? HW could either stay or be moved to the nest?
great video , thanks . I have 3 to fit in a biiiig house one for hot water and downstairs one for the second floor and one for the gym..... .is it the same principal for 2 or 3 nest ?
Thank you for all the videos ive watched a few of them, i have a very similar setup however im having trouble getting the second thermostat to fire the boiler up. Its an S Plan Plus setup with 3 vales, Water, Zone1 (downstairs), Zone2 (upstairs) Zone 1 & Water are controlled by a Nest 3rd gen, its wired exactly as you example with the jumpers from L to 2 and 2 to 5, it works perfectly for heating and Water. Zone2 was controlled by a Danfoss Tp5000 and the upstairs radiators only got warm if Zone1 was also on, regardless of the upstairs temp. I have just replaced Danfoss that controls Zone2 with a Nest Thermostat E, as i thought this would be fine for heat only. However im still having the same issue, the boiler doesnt fire up unless Zone1 is activated... then the whole house is heated up. Any thoughts greatly welcome :)
It depends on your set up and your boiler. The preferred method would be something that allows use of OT if your boiler supports it. If yiu have hot water cylinder that would have to be done on hot water priority if your boiler supports it. There is no best smart control system, too many variables.
@@UrbanPlumbers Thanks for confirming. So the stat is used to set the chosen temperature and the Nest controls the timings of when the cylinder goes on and off and heats to the temperature set on the start. Makes sense. I'm assuming you can use the Nest to boost the hot water if demand is needed outside of the programmed timing?
Great video, my system has 2 standard thermostats which control each zone, I get that these are replaced by the nest thermostat. But I also have a programmer thermostat that can control both zones and the hot water. Does anything need to be down with this programmer ?
I'm in the same situation, I think I will follow this other video ua-cam.com/video/jfIo93FtGbQ/v-deo.html for Zone 1 and HW then use this one for zone 2.
Thanks for video. Explained in all details how to wire up and make that work. I just wanted to ask, does Nest prioritises hot water first? For example if there is call for DHW on 2nd Nest, and call for heat on Nest nr1, will both zone valves be open, or Nest's communicate together and prioritises hot water first until it is satisfied And only then opens zone valve for heating? I am going to install the system with unvented cylinder and 2 zones, (radiators and underfloor heating), and I have chosen Nest over Evo Home from Honeywell as it looks more modern and user friendly, but I am afraid that heating will work same time with DHW and will take ages to heat up the water. Thank you
Hi great video and very easy to follow! I’ve one question can the hot water circuit be wired without the cylinder stat in place ..as in just open and close the hot water valve? Getting cables to the cylinder is near impossible for a cylinder stat…thanks again for such a great video
Hi great video I am in the process of sourcing a system boiler and hot water cylinder tank for a zoned system of 2 heating zones underfloor heating i believe its two zone In the video you mention open therm doesn't work with system boilers I was looking at opentherm in particular as I understand this would allow better control of the hot water cylinder ? And boiler Is this definitely not possible so wouldn recommend not searching for an open therm boiler and cylinder Or would it make sense to get an opentherm cylinder and connect the ot terminals from one of the heat links to this in addition to whatever heating zone its controlling seems honeywell evo therm is the one solution but quick glance that has limitations too
If you had a dedicated pump for each heating zone, say a under floor heating circuit on the ground floor and a radiator circuit up stairs, would you connect the feed to turn on the pump to the orange of the motorized valve for that heating circuit? So as the zone valve opened and power was sent on the orange wire to bring on the boiler it would also turn on the pump for that circuit.
Wayne Nixon it depends on the boiler. Some heat only boilers need a pump overrun and are controlled by the boiler. If the boiler only needs Sl and N the. Yes you can do that
Yes, no problem. I am assuming you have 3 port valve and one 2 port valve? Thats what is sometimes done when vented on Y plan is converted to unvented.
@@UrbanPlumbers yes i believe so. so confusing but nice video. I have a cylinder, 3 motorised valves a hot water tank. two wired thermostats and a timer.
Hello, great video. I have a two zone (up/down stairs) combi boiler set up. I have two Nest thermostats which I’d like to install. Can I have downstairs (zone 1) wired to opentherm and upstairs (zone 2) wired to standard on/off? Also if you know, why can you not have a two zone opentherm set up? Many thanks in advance.
Thank you for the video. I am currently studying ACS. I created a board like yours. I managed to wire S plan. And Y plan. Do you have wiring diagram for the two heating zones and hot water? Thank you again for your video
if you know how to wire S plan then you dont need a diagram for S plan +. It the same as S plan plus 1 zone valve. You can figure it out based on standard S plan
Great instruction. Thank you. Two question I have. In this setup when there be a demand for heat from both nests how two volves will open and the will be double signal to turn on the boiler. Will that hurt my boiler? 2nd Question. You said that OT will not work with 2 zone system. Ok. But what do I lose without OT functionality? Thank you for your answers.
No problem with 2 switched lives from to ZN - it will not hurt your boiler. Yes you loose OT on Nest multizone. If you want OT you need to use different controls for multi zone. Get someone in to do it for you if you are not 100% sure how the 230V switching works.
Okay, thank you. I will cap off the cables and place a blanking plate on the void of where the current programmer is located. I love how you explain everything so well. I will study it again before I do anything. Thanks again
Thanks. I too have programmer near boiler so once I disconnect the programmer I will have wires left behind. As I am wanting to put the nest hub upstairs next to wire centre.
0.5 to 0.75 -0 anything bigger makes it really difficult on the heat link. It is also a good idea to use ferrules on cable ends - makes the job much easier.
All fine....BUT.....While all this is all correct and proper the fact that Opentherm cannot be used is an important issue that needs to be addressed properly. The presenter is clearly aware of the problem and immediately goes to the hard contacts. However, this means that the benefits of Opentherm cannot be realised and that the system is bound to be of low efficiency by design. Not his fault because it's a flawed interface. What we really need to minimise the likelihood of multiple OT connetions calling for different water temperatures is a link box that design that can allow daisy-chaing of the boxes so that the last box calls for the highest temperature from the set of boxes. It's not rocket science but are there any manufacturers producing such devices? Apparently not. So, we're left to use inefficient systems because of a lazy supplier industry possibly also hampered by the need to train plumbers on a newer approach to their job. They won't like that, will they?
Great video, clear and concise.....well done and thanks!! One point to note for those doing this for the first time: I had an issue with the hot water always being on and after research found that the Bacterial Prevention setting was on, which turns the hot water on if it hasn’t been on for a while. Obviously on a new install it thinks it hasn’t been on for a while. I turned this off and it works fine now!! A note to anyone having the same issue!!
Yes I got fought out on this too in the past
This video was amazingly useful!!! It helped me save a couple of hundred quid for the installation. Many thanks! My dual zone nests work perfectly!
Great video with a follow up question: How to best to connect a Nest 3rd gen to Zone 1 (boiler) and A/C system (furnace in house is used exlusively for cooling). Seems somewhat obvious, however, just wanted to verify that I am not over looking a potential problem.
I did it without this video but this video is so comprehensive. I understand what I did now!
now I know I'd definitely get someone competent in to do a Nest!
yes it does take a bit of work and understanding of heating systems to install them! Not plug and play at all.
fantastic video. thanks. I'm a heating engineer and never installed a nest. they look good quality products. very well explained. Good job.
google is dropping nest sadly - no support after 2025
I love your videos. They break everything down so clearly. I actually feel confident trying it myself now instead of leaving it to my sparky.
I would never let a sparky wire my controls !
Installing my dual zone heating set up was so easy thanks to your vide. Thanks buddy it would have been a lot more stressful without this.
Thank you for this video! Your clear instructions enabled me to fit 2 Nests which I've been putting off for months because I had no idea how my new home/boiler was setup. Wish I'd found your video earlier 😄
I also have a new build but have issues of no power to the thermostat. Works fine when I plug it into the wall.
I have a combi boiler with 2 zones heating only.
Only fitting nest to down stairs zone
@@bradshoesmith5084 So the Nest thermostat's USB plug powers it fine? But when you use the 2 wires into the back instead that come from the boiler it doesn't power it?
Best video on dual heating system I’ve found. Thank you.
Thanks for the video, mine has 2 thermostat controls (Danfoss TP5000) with 4 wires each. 1 Earth 1 Live 1 Neutral 1 Switched. The switched went from terminal 3 on the nest to Brown on the valve like you said. Thanks. 👍🏻
Fantastic thanks a lot 🙏 you save my life
Wished you would have put both nest thermostat on to see if the light came on
If it was combi boiler then it would have been bingo
Absolutely fantastic video. Very clear and looks easy to follow. I've switched Combi boiler single zone thermostats before but I'm buying a house with a system boiler and 2 zone. Thanks for explaining clearly. It'll save me a lot of working out
Thank you
Excellent very clear and useful guide, thanks
Awesome video, thank you. I fully installed myself, followed each step and no issues thanks to you
Great to hear!
A note of sincere thanks for this video, I installed 2 x Nests in a heat-only system / boiler dual zone home (done several Gen1's with Combi's in the past w/o issue - system boilers are more involved). 1st main stat was a doddle thanks to the video, with 2nd zone one, though technically simpler than the 1st, taking longer as the 2nd clock was battery operated (no mains) so I needed to rethink the heatsink locale (where I'd pre-planned & agreed it) - just as per one of the examples in the video but needed to utilise 2 wires therein for the 12v nest p/s & which were not in terminals that I expected (expected common to be live and switched to be o/c but it was the other way around - but this didn't really make any difference to the install once I'd traced them in the wiring junction box to re-purpose & then took wires off from there to the new heatsink locale. Of course, I discovered other unrelated issues with the system (no pressure, rad's that needed bleeding - but without pressure, they didn't bleed well of course; loss of pressure was 2 poss 3 rads which had leaked in the past & so didn't want to normalise pressure until the rads leaks had been resolved (as under higher/normal pressure, the rad's would continue to leak - they may well do when they warm up anyway. The system also needs balancing too as at one point when pressure was normal & apparently no bleeding required then, 2 rads remained cold on full tilt / try's open etc & in the same zone. Anyway, the Nests are working a treat and this video helped me get it straight in my head before I opened the nest boxes - so a million thanks. I have my own home to do soon - which I think is a similar set-up so again thanks for that too!
Excellent video & very clear. Thank you 👍🏻
Hi ur videos r very helpful i learn a lot form ur videos thanks u r doing a great job
You are welcome
Simon what knowledge ❤
thanks for this video! managed to get my 2 zone nest system set up and running in a few hours, it would have been faster if the terminals weren't so small!!!
Great to hear!
So easy and perfectly explained. Subscribed to your channel.
Good man! Thanks
Thanks great tutorial saved me 80 quite.
Buy me beer!!!!
Agggrrhhh - no alcohol takeaway available anyway ;£
Awesome video mate, thank you
Glad you enjoyed it
What skill ❤
Can the secondary nest control the boiler through the first one, without connecting them both throug wire?
Enjoyed learnt happy thanks
It’s crazy that nest still doesn’t have a dual zone (ground & 1st floor) plus hot water. 3 output units yet.
Best has been dropped by google. No more development is planned
@@UrbanPlumbersThanks for sharing your advice & knowledge is very helpful! You mentioned at the start of the video about doing an UFH video in the future? Did you create that video? what do personally recommend for a dual zone plus water, gas fed via Ideal Logic IE boiler - Underfloor heating? Dual manifold with stats in in each room. I would like to control the boiler, water timer and floor heating master control as each room is controlled by fairly nice, touch screen stats in each room.
If we have two zone programmable thermostats and a combi boiler (new build) Do we need to install 2x Nest heat-links or can we simply remove old programmable thermostats and fit 2 new Nest thermostats using the same wiring?
hi, what happens to the HOT WATER OFF cable from cylinder stat? thanks
Would it be easier to wire a 5 core flex to the heat link from the wiring centre? Then you’d a neutral connection, L connection, 2 can be joined with permanent live in the wiring centre, 3 can be joined to the brown of zone valve & earth connection connected up. Would that be an easier option instead of installing a link between L & terminal 2? The cable connection points are so small it’s difficult to get two cables in
1st class content
Hi I have a two zone system with system boiler but I have two system programmers only one wireless thermostat the other rads in zone 1 run off thermostatic valves presumably I'll remove both programmers and replace with two heat links as long as I set one up as combi boiler and the other with the hot water as a system boiler going through the cylinder thermostat that would work?
hi, could you please explain if i have a system boiler with 4 zones, how do i set it up. Which thermostate would be setup as system and which as combi? Thanks.
Brilliant, thanks.
Glad you liked it!
Great video well done 👍
Adriatik qypi thanks!
Hello. Many thanks for the video and the explanation.
Tell me. Is it possible to have two nest thermostats connected to a a single heatlink on a combination boiler. ?
Hello, very good video.I have a question, can you control the 2 zone heating (downstairs and upstairs) and External hot water tank without having installed 2port zone?instead I have a Dab pump on each zone which has only 3 wires. Can the nest thermostat control the pumps independently and tell the boiler when to stop? What diagram should I follow form the booklet nest thermostat? Thank you!
Also forgot to mention the external boiler has like a sensor that reads the temperature, is that acting I presume like a thermostat?
Hi, is there a wiring diagram for this entire setup?
Can someone send me a link to it if there is please?
Thank you🙂
I have a single programmer that currently can turn on upstairs, downstairs and hot water independently. Is it possible to mimic this with a single nest link or will I need two?
You will need 2 nests
Excellent video. Could you please tell me what make/model of wiring centre that is? Thank you
Thank you for dual zones wiring installation videos, I would appreciate it if you could upload a video for an underfloor wiring center and nest thermostat installation for radiators to combi boiler.
That would be tricky - as there is too many variations of UFH wiring centres and ways to wire the system. It would be much better if I did a video explaining principles of controls so if you learn it you can then wire any system.
@@UrbanPlumbers I am in the process of wiring Aura underfloor heating wiring centre and nest for radiators, boiler make is Baxi platinum 40kw. Underfloor heating wiring centre has only switch wires which need to be connected somewhere to trigger the boiler, we also need to have an additional nest system working independently for radiators. Not sure how both are going to work independently.
thanks for this video and both S and Y videos, I am trying to figure out installation of nest 3rd gen with District heating, I have two thermostats for heating (one upstairs and one downstairs), the District Heating boiler in the garage with froststrat, and upstair a wiring board with two valves in the airring cupboard, would be great to get some advice or which video to follow
Hi I followed your tutorial on a 2 zone and cylinder system boiler and I get error code e4 on nest thermostat,any ideas?
Thanks
Great video, very informative. When using a nest on a three zone system ie, downstairs, upstairs and Hot water , can you control Hot water from both of the thermostats or only one of them.
Little confused by last step in wiring process with regards to switch from water tank, can you advise further with clarity please.
Nice vid. Question: my hot water is totally separate system. So can I use the 4/5/6 outputs to control second heating zone with temperature read from room sensor? So I will then only need to buy one nest/heatlink to control two heating zones?
Great video. Thanks. 1 question. I have this set up but the thermostat that controls heating and water is also connecting wirelessly to the second heat link and is therefore activating both heating zones. Is there a way of stopping it connecting to the 2nd heat link?
Great video, thank you, I have a 2 zone combi boiler, I’ve looked in my wiring panel and I have the live - neutral - earth from both valves, but I only seem to have 1 live and neutral coming in for the programmers ? Is this normal? I can’t seem to add a photo to show it. Thanks in advance, Carl
Can someone reply to this comment with a link to the wiring diagram for this setup please?
Thank You
So if the current thermostat is in a bad position just above a radiator then what options do I have if buying a Nest one. Can it be moved? What happens to the old wires?
You can buy a stand with an power adapter for around £30 and put it anywhere as it can be used wirelessly.
thanks,very helpful
Glad it helped
Thank you for a video. Which valves would you recommend for multi-zone Nest heating setup?
Great video, thank yoi
Cheers
Thanks
Good video mate.. really excellent presentation.
Can you do a video of how you set up your test rig please.. that would be so cool.
Thank you
thanks, not sure I have time to do that.
Hello, great video! I have 3 wirless thermostats for three zoned floors - am i correct in thinking that I could add an extra heat link for the 3rd zone and use thermostat stand to satisfy my requirements - do you see any issues with this?
Hi
Can you have multi zone open therm if you boiler is compatible
If so would both heat links run wires from OT 1 and 2 up into the boiler and connect to the same place
Thanks
No you cannot. At the moment Nest can only do OT on one zone, one Nest.
I have 2 air handlers and 3 thermostats.... do I need 3 nest thermostats
So there is no way to have both thermostats control the domestic hot water in an S plan +?
Has anyone had problems adding 2 stats ( Nest gen 3 and Nest thermostat E) to the same home account. Mine just comes up with a fault code, only way to do it is open second home account on the app and add second stat. Not ideal but only way I could get it to work.
Hi, brilliant video! If using a combi boiler and wanted to zone just the towel rail could I use the hot water as the zone for the towel rail and just have no thermostat on it? Meaning I’d just need the one nest.
Brilliant video! Everything was explained perfectly.
I do have 1 question though, I have a combi boiler with no water tank and a dual heating system. The boiler has a black and a grey wire which I have traced back to the zone 1 controller. Do I completely disconnect these 2 wires and put a link wire between the terminals? They are labelled on the boiler as ‘room stat/timer’. I have read the manual for the boiler and it looks like there is a link wire between the terminals from the factory.
HI, great video. Im looking to do a fresh install, would you know where I can get a diagram to start from scratch?
Hi mate, I have a job where there is 2 heating zones but they only want to control 1 zone via nest (s plan) would the wiring in the wiring centre stay the same for the heating zone they don’t want the nest on?
Yes
@@UrbanPlumbers do you have any schematics you could show me or just explain over here if you can?
Are you serious? After I have done tons of videos explaining how to install Nest on all common plans, you want me to explain in the comments sections - again?
Erhhhh - NO!
@@UrbanPlumbers no worries thanks anyway👍🏼
So to heat two zones u need two receiver and 2 thermostat?
Correct
Thanks for explaining the jumper links from active to common. I had assumed that that link would be made inside the unit. No matter. My question concerns inslab wired heating. Will I use connections 2 and 3? I explain to myself that the nest thermostat will stop and start the power via the heat link's relay. So many questions.
Hi there,
I have a dual zone heating system with a hot water cylinder. I have hot water and zone 1 wired to thermostat1 and zone 2 wired to thermostat2. Is there anyway of controlling water from both thermostats ? Or jsut thermostat 1 ?
Just 1. Can’t do it from both
@@UrbanPlumbers amazing quick response ! Thanks for quick confirmation. One last question though. Why can't I select system boiler for both thermostats ? Why does 1 need to be system and the other combi ?
@@eamonnmcgurk1671 why would you even consider having 2 nests controlling water? Too much unnecessary wiring, 2 schedules sending to signals to one zone valve, you have to set 2 schedules identical anyway. Makes no sense at all. Also you will control hot water from your phone anyway so what the point ?
If you maybe had 2 hot water cylinders with independent controls this would make some sense.
Why would you want to do it anyway ?
@@UrbanPlumbers it's not a huge issue for me. But as one of the most expensive "smart" thermostats you can buy. It doesn't work with google home assistant (to control water on/off) and if your phone is dead, the only way to turn on the water would be to go to the specific thermostat which is connected to the water control. Would be nice to control it from either thermostat as well as Google home assistant.
Hello
We have managed to set up our two nests on an on/off combi boiler and when we tested them, we’ve confirmed that each heat link is connected to the correct thermostat and that the correct valve operates for each heat link respectively.
However, when we had the upstairs thermostat set to 15deg (eco) and downstairs set to 23deg, all of the radiators in the house were on and upstairs heated up to 23 degrees as well as downstairs.
Any suggestions on what might be happening please?
zone valve could be faulty - it does not open but the ball inside is snapped off so it is still passing water. Rare fault but it does happen. Before replacing make 100% sure that upstairs zone valve does not open.
@@UrbanPlumbers thanks for your response. Both valves are operating, we can hear them opening and closing. When the heat links are in manual, the valves operate correctly but as soon as we try to control them with the thermostats it doesn’t work correctly
So if you press the button on the heat link it opens the correct valve an fires the boiler? But when you turn the thermostat on it opens both valves?
@@UrbanPlumbers Yes! Manual operation on the heat link (button on the front) opened valves accordingly (up or downstairs)
@@ReeceDawson21 are Nests wired to the heatlinks or wireless?
Hi, one question is it as simple with a pre wired unvented cylinder?
Pretty much yes
Very good
Thanks
Do you need to link, or could you take another spare live feed from the wiring centre to terminal com 2 and terminal com 5 or does the link from Nest L communicate with com2 and com5
Doesn’t matter where you take it from
@@UrbanPlumbers so If I had 2 spare live connections in the wiring centre, I could run cable from them to com2 and com5 and not need the link cable. Thanks!
@@markfenwick5441 you will only have 1 live there. Just link it - it’s easier anywya
Thank you so much for this video, ive liked and subscribed - really helpful. Just one quick question - if ive mixed up the Nest with the valves is it just a case of swapping the wires from terminal 3 to the brown wires in the wiring system? thanks again
Yes that’s it
Brilliant video, I have done my best to follow it but am struggling with the power supply to the boiler. Does the boiler get a permanent power supply? Not sure how the nest controls the boiler??
I do not cover any connections to the boiler on purpose as this requires gas safe registration
Great video! Is it possible to utilise 2 nests and heatlinks with opentherm?
Hi great video. If I have a two zone heating + HW and I only want to replace the downstairs zone with a nest I would have to leave the existing programmer in place for the other zone?
HW could either stay or be moved to the nest?
Up would move all to next and keep programmer just for heating 1 zone
great video , thanks . I have 3 to fit in a biiiig house one for hot water and downstairs one for the second floor and one for the gym..... .is it the same principal for 2 or 3 nest ?
yes same thing
Thank you for all the videos ive watched a few of them, i have a very similar setup however im having trouble getting the second thermostat to fire the boiler up.
Its an S Plan Plus setup with 3 vales, Water, Zone1 (downstairs), Zone2 (upstairs)
Zone 1 & Water are controlled by a Nest 3rd gen, its wired exactly as you example with the jumpers from L to 2 and 2 to 5, it works perfectly for heating and Water.
Zone2 was controlled by a Danfoss Tp5000 and the upstairs radiators only got warm if Zone1 was also on, regardless of the upstairs temp.
I have just replaced Danfoss that controls Zone2 with a Nest Thermostat E, as i thought this would be fine for heat only.
However im still having the same issue, the boiler doesnt fire up unless Zone1 is activated... then the whole house is heated up.
Any thoughts greatly welcome :)
Can't really comment without being able to see the system
@@UrbanPlumbers not a problem, after checking the wiring I think the 2 port valve has failed.
Thanks for the all the useful information 😊
What’s the best smart system to control
Underfloor , rads 1st floor and hot water
It depends on your set up and your boiler. The preferred method would be something that allows use of OT if your boiler supports it. If yiu have hot water cylinder that would have to be done on hot water priority if your boiler supports it. There is no best smart control system, too many variables.
In this setup is it necessary to have a cylinder stat? Isn't that something that can be controlled by/with the Nest?
You can only control timing with Nest. The temperature of the water cylinder still needs to be controlled by a cylinder stat.
@@UrbanPlumbers Thanks for confirming. So the stat is used to set the chosen temperature and the Nest controls the timings of when the cylinder goes on and off and heats to the temperature set on the start. Makes sense. I'm assuming you can use the Nest to boost the hot water if demand is needed outside of the programmed timing?
@@mosuhu yes you can
@@UrbanPlumbers 👍🙂 thanks again, your videos and replies have been invaluable.
Great video, my system has 2 standard thermostats which control each zone, I get that these are replaced by the nest thermostat. But I also have a programmer thermostat that can control both zones and the hot water. Does anything need to be down with this programmer ?
I'm in the same situation, I think I will follow this other video ua-cam.com/video/jfIo93FtGbQ/v-deo.html for Zone 1 and HW then use this one for zone 2.
Thanks for video. Explained in all details how to wire up and make that work. I just wanted to ask, does Nest prioritises hot water first? For example if there is call for DHW on 2nd Nest, and call for heat on Nest nr1, will both zone valves be open, or Nest's communicate together and prioritises hot water first until it is satisfied And only then opens zone valve for heating?
I am going to install the system with unvented cylinder and 2 zones, (radiators and underfloor heating), and I have chosen Nest over Evo Home from Honeywell as it looks more modern and user friendly, but I am afraid that heating will work same time with DHW and will take ages to heat up the water.
Thank you
It’s not down to nest to do DHWP, you need it set up your heating system for that and yes Nest can be used for DHWP
@@UrbanPlumbers Thanks 🙏
Hi great video and very easy to follow! I’ve one question can the hot water circuit be wired without the cylinder stat in place ..as in just open and close the hot water valve? Getting cables to the cylinder is near impossible for a cylinder stat…thanks again for such a great video
then how does boiler know when cylinder water is up to temperature, for example 60 degrees. you cant be turning it off manually everytime
Hi great video I am in the process of sourcing a system boiler and hot water cylinder tank for a zoned system of 2 heating zones underfloor heating i believe its two zone
In the video you mention open therm doesn't work with system boilers I was looking at opentherm in particular as I understand this would allow better control of the hot water cylinder ? And boiler
Is this definitely not possible so wouldn recommend not searching for an open therm boiler and cylinder
Or would it make sense to get an opentherm cylinder and connect the ot terminals from one of the heat links to this in addition to whatever heating zone its controlling seems honeywell evo therm is the one solution but quick glance that has limitations too
Multizone OT with nest is not possible. It is the boiler that is OT, cylinders do not matter
If you had a dedicated pump for each heating zone, say a under floor heating circuit on the ground floor and a radiator circuit up stairs, would you connect the feed to turn on the pump to the orange of the motorized valve for that heating circuit? So as the zone valve opened and power was sent on the orange wire to bring on the boiler it would also turn on the pump for that circuit.
Wayne Nixon it depends on the boiler. Some heat only boilers need a pump overrun and are controlled by the boiler. If the boiler only needs Sl and N the. Yes you can do that
Actually scratch that, if you had pump in each zone then you will also have LLH before the boiler - in that case you could just wire to orange
@@UrbanPlumbers LLH? What's that :-)
Wayne Nixon low loss header
@@UrbanPlumbers oh yeah or close coupled tees
Hello my smart is show yellow drop want that mean ???
What?
Can this work with OpenTherm compatible Combi?
only on 1 zone. Will not work on multi zone
If you have 2 zones on a Y-Plan is one Nest compatible?
Yes, no problem. I am assuming you have 3 port valve and one 2 port valve? Thats what is sometimes done when vented on Y plan is converted to unvented.
@@UrbanPlumbers yes i believe so. so confusing but nice video. I have a cylinder, 3 motorised valves a hot water tank. two wired thermostats and a timer.
@@nadeemsharif99 sounds like you are on S plan +. Are all valves 2 ports valves or do y ou have one 3 port?
@@UrbanPlumbers there are 3 valves thats all i know
Hello, great video. I have a two zone (up/down stairs) combi boiler set up. I have two Nest thermostats which I’d like to install. Can I have downstairs (zone 1) wired to opentherm and upstairs (zone 2) wired to standard on/off?
Also if you know, why can you not have a two zone opentherm set up?
Many thanks in advance.
Leonard Luther unfortunatley you can’t do that, no OT on multizone available at the moment as far as I am aware
Urban Plumbers then I will follow your set up, thanks again.
Thank you for the video. I am currently studying ACS. I created a board like yours. I managed to wire S plan. And Y plan. Do you have wiring diagram for the two heating zones and hot water? Thank you again for your video
if you know how to wire S plan then you dont need a diagram for S plan +. It the same as S plan plus 1 zone valve. You can figure it out based on standard S plan
@@UrbanPlumbers OK I see so the zone valve supplies the hot water and the heating is controlled by a programmable thermostat. Thank you
Great instruction. Thank you. Two question I have. In this setup when there be a demand for heat from both nests how two volves will open and the will be double signal to turn on the boiler. Will that hurt my boiler?
2nd Question.
You said that OT will not work with 2 zone system. Ok. But what do I lose without OT functionality?
Thank you for your answers.
No problem with 2 switched lives from to ZN - it will not hurt your boiler. Yes you loose OT on Nest multizone. If you want OT you need to use different controls for multi zone. Get someone in to do it for you if you are not 100% sure how the 230V switching works.
@@UrbanPlumbers thanks for day response! Appreciated! Wrt to OT what does this gives? Will I lose much of not having it?
Can you recommend some other solution which work with opentherm in two zones?
Paweł Ciężarkiewicz honeywell will work with OT multizone
@@UrbanPlumbers you mean 2x Honeywell T6R? What about hot water then? T6R-HW + T6R
How do i get in contact with you for hire to install the Nest ?
Www.urbanplumbers.co.uk
Can I just wire both heating zones in to one nest?
You can but that defeats the purpose of having 2 zones.
Thanks for the reply my 2nd zone is just 2 radiators so a bit pointless really
Great video! One question.. if I have a programmer, what do I do with the wires, or can I just leave the programmer on permanently on??
remove the programmer and re wire as in the video
Okay, thank you. I will cap off the cables and place a blanking plate on the void of where the current programmer is located. I love how you explain everything so well. I will study it again before I do anything. Thanks again
Thanks. I too have programmer near boiler so once I disconnect the programmer I will have wires left behind. As I am wanting to put the nest hub upstairs next to wire centre.
You say you don't need to wire the earth next to T1/T2 because these are class II appliances, but that is not what the installation instructions say.
Mark Fenwick you are correct - it says that when using T1 and T2 to use earth.
What size cable are you using ?
0.5 to 0.75 -0 anything bigger makes it really difficult on the heat link. It is also a good idea to use ferrules on cable ends - makes the job much easier.
@@UrbanPlumbers Thank you !!
not being able to use open therm on 2 zones really does suck..
I have to agree
All fine....BUT.....While all this is all correct and proper the fact that Opentherm cannot be used is an important issue that needs to be addressed properly. The presenter is clearly aware of the problem and immediately goes to the hard contacts. However, this means that the benefits of Opentherm cannot be realised and that the system is bound to be of low efficiency by design. Not his fault because it's a flawed interface. What we really need to minimise the likelihood of multiple OT connetions calling for different water temperatures is a link box that design that can allow daisy-chaing of the boxes so that the last box calls for the highest temperature from the set of boxes. It's not rocket science but are there any manufacturers producing such devices? Apparently not. So, we're left to use inefficient systems because of a lazy supplier industry possibly also hampered by the need to train plumbers on a newer approach to their job. They won't like that, will they?
Hi , would u wire up the same on hive dual zone but without the 12v feed going to the thermostats , thanks
No, hive is a little bit different. Ito is actually easier to wire