As an electrician who’s worked on boilers for 12 years after 2 minutes I’ve spotted 2 mistakes 🤣 That’s a heat only(conventional) boiler not a combi. Also a thermostat should be where the radiator has a lockshield which will probably be the hall. The hallway would usually be the best place for a thermostat because it has the most air movement and will give the best indication of a mean temperature for the house. It’s building regs 👍🏻
Stuart Andrews No, a system boiler has a built in pump and pressure vessel. A heat only boiler is exactly that it heats the water. There’s an external pump.
That pump does have a pressure sensor in it, it's a new gen Grundfos with speed control depending on system back pressure (EU energy eff legislation). It does appear that heating system control wiring is not something he's overly o fey with though.
Jordan, love all your videos. We had nothing like this in the early 90's. It was a simple thermostat in the kitchen and I had to open windows if rooms got too hot. Having lived in Hong Kong for the past 23 years, I am looking forward to coming back to the UK in a few years and marveling at the new technology.
TBF to Jordan, he knows about as much about how a heating system works as a Plumber does about electrics. This is exactly where You Tube gets dangerous because people will follow this video and believe what they are being told. S plan and Y plan wiring is designed with safety in mind. Any part of the system fails and it stops the boiler. If a valve is closed its really important that the pump stops running which is why the valve controls turning the boiler and pump on. If the valve ails to open you don't wanna burn out the pump or run the boiler until it pressure releases or worse. This is where a good knowledge of what you are doing and testing before you start filming is important.
You can have closed valves and pumps running - a lot of boilers require pump overrun - so the pump runs after valves close and boiler stops. That is why you have auto bypass installed on systems (if installed correctly) - also, a lot of combis and system boilers will have an internal bypass for that reason. Not a problem on Y plan - as there is always flow through either heating or hot water cylinder coil. Pump will not burn out even without a bypass if running against a closed valve.
Thanks for posting this, Jordan. I am a DIYer contemplating an upgrade at home. I am already familiar with HIVE but the NEST units look really good. The wiring explanation was helpful too
@@nickh2519 im having trouble my wiring at the minute. have to keep pressing a reset button on the receiver. gona have to get an electrician to have a look.
Worryingly a Nest Pro installer with no idea how the heating system operates. That was a days training well spent. Good job you didn't encounter a pump overrun as that would have totally thrown you when you were firing it up.
He’s been on a training course for this????? Now that is worrying!!! As you say it’s just as well he didn’t encounter pump over runs or frost stats zone underfloor.
Man I hate boilers and boiler wiring - It's labyrinthine. I tackled 2 zone system similar to this in my old rental to self-install 2 Nests. My new place has UFH/heatpump and I found the manifold wiring system far easier to integrate into the nest than the old gas boiler - have 5 nests in the new place. Thanks for showing your approach to the job!
Should dual zones not have a third for hot water via boiler also? Like the typical 2000s stat ground, first & water. I considered them to be fairly standard as suit most semi detached house 2/5 bed set up.
Where is the best place for the thermostat to go? Ours is in our hallway as recommended by person who fitted our vallaint boiler. Our hallway is narrow with 2 long windows either side of door and is always cold.
Is it possible to have two of these running in a house without it been on a diffrent zone the reason i ask is my elderly mam has one if these down stairs but it woukd be good if she had one upstairs also
If you have 6 X underfloor heating zones (rooms) with individual room controls (actuators). Am I right in saying that you would need to install 6 X nests?
Great video, my house heating system is set up exactly the same as this I’ve been thinking of installing a nest for a while, I didn’t know you could incorporate the hot water as well
yes, i am going to install them but I am confused about how two-zone can work with a combi boiler system without a hotwater tank. one in the living room and one on the first floor?!!!! if the temperature on the downstairs, ground floor is 22C, how can the first-floor's thermostat adjusts the temperature to 19C, while both of them are connected to one combi boiler?
Very interesting video. I especially enjoyed the bit when you explained how the wiring centre works. Please keep the videos coming, enjoying all of them.
So I have to replace my programmable unit as it died today. I am thinking of going the Nest route. However, my programmable unit not only allows dual zone heating control (7 day, 3 timeslot scheduler), but also allows control of the Megaflow heating schedule. I not yet seen any example of replacing such a system using a Nest as I'd like to replicate my almost 3-way heating schedule. Any ideas?
I’ve got dual zone system and one of the nest heat link suddenly stopped working, just can’t connect with the thermostat. After nearly 8 hours chat with nest support I’ve been told that the reason for that is because the heat links are close to each other. Any advice will be helpful as I don’t think that they know what they are talking about. The two heat links are working like that for over two years.
Hello guys, I want to hard wire all my thermosts, I will have 3 zones. I wanted to know what cable I needed to run to each thermostat? Is it 5 core, 1.5
Hello, great video, I learnt a lot. I have a two zone (up/down stairs) with a combi boiler. Can you set up both nest thermostats with Open Therm on a two zone system? I can’t find any info on this so I’m guessing no, but if you have an info that would be great. Thanks in advance.
I have a valiant combi gas boiler, I have 2 zones one in the bedroom and one in the lviing room, How do i order the dual zone i dont see it on their web site must you call them to order?
It looks to be an S-plan system, the programmers/thermostats control the 2 port valves, when any of the zone valves open and makes their limit switch the pump and boiler are powered up
Jordan if you are just switching a heating zone do you get one that just does heating or do they only come as heating and hot water and you disable the H/W. Also, I was always told you install a stat in the coldest room ie the hall if you have it in the lounge which gets a lot of sun the colder rooms the heating gets shut off before it got the room up to temperature. I also got told that you have to keep going past the stat if not it turns the heating off what are your thoughts?
I have a ideal combi boiler with the nest learning stat that’s wired to terminals 2 and 3 for volt free switching in the heatlink but I’m asking anyone who knows if it’s possible to use the 5 and 6 terminals that has the live link to make them 240v and still keep 2 and 3 volt free. It’s just that I’ve added ufh and need switched power for the pump. I haven’t installed a zone valve as I only want one stat. Is this possible without blowing the unit?
Hi Jordan, great video again 👍🏻 Have to mention that you used a 7 core flex for both 240v supply and the 12v for the Nest thermostat connections, have to watch separation between voltages!
Hi i have currently just bought a house the house was built-in the 1930 and all the plug sockets are in the skirting boards. Now i want to move them up higher but iam struggling to find what is the correct height for them. P. S i am not touching any wires iam only doing the wall chasing then going to get a electrician to do the rest. TIA
Very rarely....boilers in a domestic property are normally taken off the nearest ring or radial unless they have used the old immersion heater circuit👍🏻
Yes mate keep up the good work on here mate keep up the good work on here mate keep up the good work on here mate keep up the good work on here mate keep up the good work on here mate keep
I guess now we have the Drayton Wiser, Nest is pretty much redundant, especially if you have two heating zones as buying two Nest’s has no merits whatsoever over the Wiser system.
I'm contemplating installing 4 x nests onto a large 4 zone house. And was just wondering what the app looks like with multiple units? Can they be labelled, for example 1st floor, 2nd floor, etc.. And are they eaily distinguished, as in, for an elderly person to use? Thanks in advance and great video!
Hi I'm weighing up Nest vs Hive. I work shifts but house is occupied all day so need a system that can turn hot water on/off at various times . Currently we have 6 individual room thermostats so are these kept or redundant ? Require a system that also works with underfloor heating. Sorry for all the questions but it's a big investment and want to get it right.
Hay great video! Question... I have the same heating setup. I currently have a Nest thermostat E for up stars, which was easy to fit and working well. I would like to have a nest learning thermostat for down stairs. Can I have the Learning thermostat as a call for heat only, and keep the hot water controlled by the programmer? what do you think? thanks
@@artisanelectrics I'm looking for something like that. Did you cover Bedfordshire area? I have dual zone as well, combi boiler. May I ask you to make a price for the jos? I have devices. Thank you.
Really Jordan don’t talk about heating wiring unless you know what your talking about , unless you were just nervous making some classic mistakes , pump comes on with flow switch !!! 🤣
This is so bad it’s painful... pump starts because it senses the pressures released??? No it starts because the switched from one of the zone valves is closed and therefore providing power. The wiring guide wouldn’t have helped in this situation as it’s only for 2 zones valves ie heating and hot water not a second zone of heating as well. The black from in with the pump live is the boiler fire... ie it goes to the boiler to tell it to start.
Do you know Google 'accidentally' omitted a Nest security device's built-in microphone,?? f you have a Google Nest Aware subscription, your camera's audio is recorded in your video history as long as the microphone is on!!!
Hi mate how are u OK mate keep up the good work on here mate keep up the good work on here mate keep up the good work on here mate keep up the good work on here mate keep up the good work on here mate keep up the good work on here mate keep up the good work on here mate keep
@@artisanelectrics It allows the thermostat to control the boiler, so for instance with a standard on/off thermostat, the boiler will run full blast till the set room temp is reached and most likely overshoot it, then shuts down, room temp drops, boiler runs full blast again etc etc............... Opentherm allows your smart thermostat to better control the boiler temp, by being able to ramp the boiler up or down when near desired temp or when far away from it. More cost effective on gas, and keeps a more consistent room temp. Probably haven't explained that very well, hope it makes sense 👍
@@Mark-gf7yw explanation sounds good to me. Its basically looks at the differential between setpoint and measured value, and ramps up or down the boiler accordingly.On ours, only very occasionally does the temperature overshoot the setpoint, in which case it closes the valve and shuts down the boiler. Less cycling means a happy boiler (apparently)!
