Central Heating Electrical Wiring - Part 2 - S Plan
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- Опубліковано 14 жов 2024
- Electrical wiring for central heating systems.
Part 2 in the series looks at S plan wiring, a system which uses two separate valves. One valve for hot water, another for heating.
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By far the best video on UA-cam explaining s plan wiring . Very helpful .
Thanks JW. My mother had been without central heating for the last 2days. Today the heating engineer didn’t tun up. Your videos helped me when I was training to become an electrician. And they have proved invaluable again. After searching in vain I came across this video and was able diagnose the problem in minutes. And restore heating. Thank you again John. Please keep making videos.
Exemplary video - Clear, unambiguous commentary combined with great diagrams. I went from being unclear on the operation of my system to understanding the totality after one viewing. This sort of clarity is unfortunately incredibly rare on UA-cam (and elsewhere). It is rare because it is very difficult to make things appear simple and straightforward while covering the subject comprehensively. Well done and thank you.
Thanks John, you helped me to realise that the three cables entering my programmer box were the three-core timer-power cable, the power-out cable going to the boiler, and a three-core cable consisting of neutral and yellow cores from the room thermostat, and a red core from the cylinder thermostat; rather than the advice that I had received from the electrician who had fitted the previous programmer, that they were a power cable, a cable from the room thermostat and a cable from the cylinder thermostat. No wonder I kept blowing fuses as I replaced the old timer with one which would control the water and the central heating separately. Oh what fun I had as I vaporised the neutral core on the power-out cable! What pretty flashes it made! I was so happy that I only burned out the switch on the fused-spur! Thanks once again for such clear expositions of all things electrical.
You really shouldn't be messing with stuff you do not fully understand, you'll either hurt your self or someone else, get someone in that is qualified for your own sake.
Great video, John. Liked the way you built up the diagrams and also the simplified versions to show when various parts of the wiring were live.
Exceptional clarity, and extremely useful video. Now I understand how my system actually works, and in great detail, so thank you.
Likewise. Thanks very much
@@richie5458 Do you have a telephone number I can contact you on for some help
If only college days were this clear and concise. Fantastic video !!! Thanks you so much. I can now stop pulling out what hair I've left..
Excellent and very well explained as always. Helped my fix a overrunning pump issue - turned out to be a faulty valve exactly as described in the video.
thank god for you john...god knows where wed be without you, clarity, understanding and an ability to communicate/teach
Excellent video. I'm new to the industry and currently on intense training course to be a gas safety engineer. Did this same topic in class yesterday and couldn't get it round my head. This video has helped my understanding greatly and the way John does the presentation is excellent and his calm voice helps. His videos will be my reference during my course. great job!
Many Thanks John for saving me a lot of time trying to work out the wiring plan for my 40 year old boiler.
8 years ago vid still doing extremely well in terms of illustration and logic, as well as the fault finding tips, brilliant.
Great Video, very well explained. Really liked the way you explained the reason why the external motor remains on for a while before going off. Excellent. Well Done JW
Thanks as always for providing these guides. They are perfect, unlike every professionally or DIY system that i encounter each time I move house. I spend a day wondering how on earth any of it works, draft countless schematics, then remember your channel and suddenly I am able to understand the bodge before me and rework so it's closer to standard.
This time we have 30 year old house (was the show house) where mains and the boiler wires start at the programmer and the room thermostat is fitted to it too.
Thanks again John for preparing, producing and sharing. Very much appreciated.
Thanks John, I fitted my system many years ago now wanted to replace the cylinder thermostat . Your vidio and explanation refreshed my memory regarding what wire fed what as this new themostat only has three teminals.
Best video I have seen on this, by far.
I only wish you had produced it before last winter when my 3 way mid position valve decided to go on strike.
I know that particular valve is just a combination of the two you have shown but working out how it worked with the other components and what the fault was caused me no end of problems.
It was a faulty actuator head on the valve (only a year old) .
The symptoms were no central heating unless the tank thermostat wanted the tank heating.
Removing neutral and earth wires made this very easy to understand - great video.
Never fails to explain it extremely well. I nominate John for an OBE. Can I get a second?
Thanks for taking the time to create this John. Clearest explanation I've heard, with good graphics too! Thanks
Sorting out problems with an inherited system. this was invaluable. Very clear. thank you
Excellent - just how a video should be - clear, concise and no unnecessary information.
Hi John, I am learning electrical insulation and found your videos highly useful. In regards to central heating wiring system, if I could kindly ask you to produce newer video. Because I found your recent works much more easier to understand. Love you a lot and thanks for making difference.
Great video, going in for my am2 in a month and wanted to know how the wiring all works instead of just following a diagram, your video is perfect to learn from as the step by step really helps, massive well done
Great video explaining everything in simple steps to build up the full picture. Removing some of the common wiring to show how the system works and common faults was very useful. The clarity, simple plain English explanation and build up, one of the best videos I've come across. Hope you can update it with new hive connections on combi and system boilers.
Really, really helpful for documenting the configuration and diagnosing problems on my central heating system. Thank you so much!
Excellent , I've just moved house and this is invaluable....Many Thanks
Brilliant breakdown of the S plan in full detail 👏👏👏👏👏👏
Amazing explanation John. Your electrical signal flow graphics made things really simple to understand. Much appreciated.
Brilliant and very clear, as an electrician I had never worked on central heating wiring, this did validate the fault diagnosis that I had made for my own house.
Well done John, again you saved my life, Had a Cowboy plumbing moving my boiler but after he wired it did not work, Only to find he had his own way of wiring it, So I pulled all down and followed your Video ,AND ALL WORKS, Thank you again for the Video.
Very well explained indeed. Spent most of my life doing electricals and I found this excellent. Thank you for your time.
Thank you. Your videos are not only my guilty pleasure. .. but very educational for me.
They also turn him on
You never fail jw excellent display.
Many thanks JW. Such a great logical explanation in a well illustrated & timely manner. Just brilliant.
The definitive video/playlist on heating control wiring .
This video is better, much more understandable thanks to the brilliant diagrams, excellent work John, bit lost before watching this video good work, thank you.
Brilliant video for newly qualified engineers. Thanks
Hi John, brilliant videos thanks very much. We are installing a boiler stove that will be connected to an existing heating system. so adding an extra thermostat and pump to the right side of the chimney breast in a Heat Hero system. Do I run a 5 core wire from the new pump up to the existing wiring centre (EPH) and where in the wiring centre do I connect this wire? Thanks again
I was told the I need to run a relay from the new pump to the existing motorised valves in the hot press, I presume this means wired into the wiring centre in the hot press, just unsure what core I need for this and where to connect into the centre
Explaining things simply is an art form!!
Subbed
I like your videos and the way that you explain things that become so obvious after your explanation, I wonder if you could do a video on wiring centres for underfloor heating and how do they go with the s plan wiring.
keep it up
clearest explanation I have seen of the 'S' plan.
Fantastically helpful video John, it's helped me diagnose a failed Honeywell valve on the central heating system :)
Thank you for this video. It saved me a lot of heart ache. Had a faulty valve which kept the boiler on and when I went to replace it. It turned out the person who had done the installation had put the two thermostat in series on the heating system and none for the hot water 😳
Great video - explains everything I need to know for my heating controls. Thanks.
Thank you! Very clear and concise!
Thank you John, probably far more information here than I needed to know but like others visited to check programmer compatibility with a Nest or Hive. Cheers for an excellent video
Great video with really clear explanation. Thank you for taking time to make it!
Total pro.
Very clearly spoken and described at steady pace.
Tx a mil
Best explanation I've seen.
Your a legend thank you…always struggled with heating controls
Great information. Thanks for publishing this it's a great explanation of how a heating system works.
Been looking for a simple explanation of these systems for forty years ! Very well done.
Great video,very clear and easy to follow, I used it to build a 2 zone central heating, and megaflow hot water system as a separate zone, in my new but old house👍🏻😊👍🏻 cheers JW
Very clear & detailed video, thanks you for the explanation.👍🏼
Great work I have been following this video but nothing seems to work I'm training on a board and I have a light Bob instead of an actual boiler could you help please
John, Thanks for another amazing video, I have been following your channel for a long time and love your videos, I have just realised how easy it is now going to be for me to automate my central heating system using Arduino and make it work with my planned home automation system that I am currently planning to build. Thanks so much
An excellent video, very clear to understand and exactly what I was looking for. Thank you so much for taking the time to make the video and share it.
Very good explanation.
Well done you!.
Best DIY videos start like this "minames Allen Hart" and "Hello, I'm JW"
Very well explained. I have 3 zone , 2 zone heating and 1 water immersion. The thermostat is L-N power supply and 3zones wiring. The boiler has been replaces with a new one Grow warm. Now I have to turn On the water to make working the 2 zones of heating, if I need only the heating I cannot turn On without water On. Seems a S plan plus.
Any advice will be appreciated please. Thank you
Such a brilliant explanation.cheers
Great video John, really informative and you get the information across clearly. Spot on!
Pilaties seated
Fantastic as always John.
John...That was excellent.......I know exactly where to check now.....My central heating was not switching off with the timer removed so it looks like heating control switch that is faulty.......Many Thanks.....
Thanks for the video John, I had been struggling with this for a while, cheers.
Thanks for the upload, I’m an electrician and my workplace refuses to give me more experiences. So 1st fixers are always 1st fixers, 2nd fixers are always 2nd fixers etc, they do this to prevent you developing the abilities to become self sufficient and leaving for better pay. I’m one of the few allowed to do a larger mixture than *just* that, but they refuse to let me learn heating systems or industrial aspects of electrics. I can’t stand not learning anything new.
Don’t know if this is common practice but it’s annoying as hell. There’s some lads who have 15 years more experience than me but have never tested an installation or second fixed a fuseboard.
Find another employer.
great video and really explains it very well
Excellent video, very clear, and to the point, thank you
John I find your videos very helpful best on here could you do a detailed video on a heating system involving a underfloor heating wet system involving the manifold etc would be much appreciated
Best Description I have seen, Thank You
Very good explanation, thanks
Excellent videos and information - thank you. I now know what all those wires and boxes do! A question - I'm considering installing a Nest Thermostat (third generation) and wondered if you could post a wiring diagram for the Nest system. Would also be useful to then see which components (and wiring) of the existing system effectively become redundant as a result (Eg the programmer and the wiring to/from?)
S- plan systems are the most simple to install, understand and wire and they are usually the only sensible option if you have more than one heating zone. They are also preferred option for systems with unvented hot water cylinders because if the cylinder overheat stat trips, power is instantly disconnected from the valve and it closes
Many many thanks for a well presented easy to understand video. 👍👍
Brilliant teacher
Excellent, very very clear, thank you
Massive help in understanding this before I do my AM2 exam, I never touch heating systems
Thank you the explanation is perfect I hope to see more about Y plan and other central heating wiring diagram.
Y plan video currently being prepared.
I do like your videos ive learnt alot from you information is plain and straightforward.
Hi JW, just wanted to check my understanding... I thought in the last vid you said terminal 3on the programmer was HW OFF, yet here terminal 3 is sending the signal via the cylinder stat to the pump to turn ON.... Id be grateful if you could help me clear this up? Cheers. Great video as always!
Very clear explanation thank you
Thanks JW your such great video and explanation. As a new immigrate, this is my first time to fully understand U.K heating system and how it runs. However, I have a question may be stupid, hope you can explain more. In current heating situation, a programmer and thermostat must both ON to start the heating? Is it possible just turn ON thermostat to start heating without programmer ON? In my situation, the thermostat and programmer are installed on different room. It is quiet inconvenient to switch heating especially at night. Any suggestion? Thanks in advance.
As shown in the video diagrams both programmer and thermostat must be on for the heating to work.
For systems with only a single device (usually an all in one item such as a Nest, Hive, Tado etc) they are usually wired in the same way as the programmer, except that the switched output connects to terminal 5 instead of going via a separate thermostat.
Fantastic video. Thank you.
Hi John. You videos are so helpful. You have saved me hours of my mate trying to explain this to me.
However. I was under the impression the permanent LNE core feeding the valve were going to be brown, Bld, and green yellow but my mate uses different colour cores and insists he's doing it correctly. What colour cores would you use for what conductors on a 2 port valve.
Excuse my lack of knowledge. I'm still learning.
What a brilliant video
Superb video, thank you!
Excellent video
Well explained John. How would you incorporate a solid fuel stove with backboiler to this s plan system. So if the oil burner is off and you want to heat the rads from the stove given that there are 5 valves. 1 for HW and 4 for CH. Thanks.
Great mentoring, thank you for taking the time to educate us meer mortals... very useful video, made clear with accurate instruction
There won’t be a better example than this 👍🏻
Excellent. Crystal clear.
Very clear and informative video JW. However if as in my case a frost thermostat (boiler located in unheated garage) and a pipe thermostat (to override frost thermostat once warm water is flowing in pipework) are required, is it safe to assume they are wired in series between terminals 1 and 10 please?
Excellent videos. Thanks very much. A question about the 2 port valve in this arrangement.
Most 2 port valves have an external lever so that the valve can be manually opened. When the lever is latched open, does the electrical switch also become closed? If so, surely the boiler, pump would be providing heat to the cylinder, but the cylinder thermostat is bypassed.
The lever only opens the valve, the switch won't be activated. If it's open on the lever and the valve is then powered, the lever will be unlatched and the valve will close once power is removed.
The manual lever is only there for filling / draining the system.
@@jwflame got it. Thanks!
Well put together. Impressed by drawings etc.. Good job
John. A very informative video. Part of my tool kit now. Many thanks👍
Great video thanks, The problem found is when I've got both hot water and heating off the boiler still firers up from time to time, Is this because the power to the boiler is not controlled though the hub or should it be?
Fantastic video! Where does the satisfied terminal get connected to on the boiler stat and where do the hot water off and central heating off connections in the programme go to, as these are not shown. Many thanks
Those terminals are not used for S plan.
@@jwflame thanks John your a legend 👍. I'm actually a long serving spark but always avoided getting into boiler controls. I'm now on a job where I have one to do! Your video has been SUPER helpful 👍
Thanks for the excellent video with illustrations. You showed very clearly what happens to the the room star when you replace with hive. How does one wire the hot water side when fitting dual channel hive.? I m upgrading from single to dual channel hive. Which cables do I connect to water on and water off from the control box. ? My timer is still in situ , left On. I have the S plan
Hive replaces the existing timer or programmer. Covered in this video: ua-cam.com/video/tFT1AJsbMfo/v-deo.html
Brilliant video and so easy to follow I have a great idea of how a s plan works
👍👍 can't wait to see more
Hi been enjoying watching your videos! Havent done s plans in a while but one video brought it all back. Great explenations. Im wondering,if tow valves on CH was for two seperate flats and each flat had a thermostat. What would you have to do with the programmer for hot water? would you have to have one in each flat or none at all? as the boiler would just be supplying hot water on demand? Thanks