Central Heating Electrical Wiring - Part 3 - Y Plan

Electrical wiring for central heating systems.
Part 3 in the series looks at Y plan wiring, a system which uses a single 3 port valve. This has one inlet and two outlets, one for hot water, the other for central heating. The valve can be set for either outlet separately or both at the same time.

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[lexmarkakis]

John Ward is so under rated this guy is giving out gold dust thank you mate 🙏🏻

[TGODHUMMELS]

That moment when your college course fails you and you rely on John Ward to teach you how to pass half of your AM2 Exam.... Cheers mate, you are helping people every day with your attention to detail in every video you make. keep it going!

[johnnicholas]

This guy is brilliant...I'm 64 the money and more important....the TIME...IV spent on these courses over the years.
wish I had access to John's brain years ago....his very good at it...

[garyharrisonuk]

Probably the best, informative, well presented, Youtube video I have ever watched. Great work John, thank you for taking the time to create and upload.

[lifter]

A masterful explanation of a complex process, clearly and concisely delivered with no stuttering or pausing for thought.

[martinsmith]

Just watched this as I've got to sort out a few problems on a Y plan heating system . Very very good explanation with no confusing fancy trade talk. As with most things if you understand what it should be doing and exactly how it works, it's so simple so accurately diagnose the fault like a proper engineer and not a guess engineer. Great video John, Many thanks

[marclindup]

John thank you very much for this. I don’t think my hot water and central heating have ever worked properly. Took it apart and re-wired as your drawing and it all looks to be great. Thanks again. Love your channel.

[AB-oclj]

Have watched this five times now and learn something new every time. Everything about this video from content to presentation is top drawer! Brilliant diagrams too.
I find that I am watching more and more of your videos. Keep up the good work John.

[irelmo]

This has helped me understand my heating system and allowed me to replace the valve motor and pump.
Amazingly clear explanation of it all.
Next will be to re-wire as it is a really big mess!

[petergregory]

This was invluable in my 'home install' of a Hive system and also upskilled my knowledge of how my heating system works. I agree with the comments below, very clear and easy to understand video, keep up the great work JW!!

[Guillelgas]

I've bought a new house a noticed the Heating only option was not working (could only get heating when hot water was on and heating the cilinder). Thanks to this video (among other info online but this mainly) I pass from not knowing how my system works fully to indeed identifying the problem and solve it (replacing the 3-way valve actuator).
Thank you very much for this free content with such a high quality that is unbelievable !

[karhukivi]

Now I understand why there were four wires coming from the house (room thermostat and timer clock) to the boiler-house. Thank you for an excellent vidoe!

[Ian-yxde]

Great video John. Didn't think my system had been wired correctly- it linked HW&CH together despite having all the hardware to be able to seperate CH only. I'd never bothered with the issue till the price of gas rocketed upwards . Masterful explanations for a non-engineer such as I, you enabled me to re-wire completely and sort it. Thanks

[markkemish]

Thank you so much for creating this video, using this video I was able to fit a new Hive system, and I finally have correctly working heating and hot water . The previous system was suffering from a broken room thermostat, but more importantly thanks to your video I realised that the engineer had wired the previous system incorrectly. I would have been lost without your help. thank you.

[jonathanhaslam]

This video made soo much sense compared to others, love the drawing and the firm and ver clear to understand and that from someone dyslexic. Thanks John a true engineer right here! sub, liked, and shared!

[fredrickwelch]

One of the most underrated channels on YouTube

[whitefields]

JW, thanks for going to the trouble to make this. There is a lot of thought and production time in this. It is much better than the plumber’s vids. This step-by-step approach helped me diagnose a faulty programmer, having started out thinking it was the 3 port valve. Your description helped me put in some jumper wires to bypass the programmer to verify it was indeed at fault before I went to Screwfix for a new one. All too often tradesmen just fit new parts until the problem goes away rather than do the diagnosis first. I stripped down the old Drayton LP522 programmer and found the CH relay was OK, but not energising, but could not go any deeper because of the ATMEGA 169P microprocessor driving it. I've posted the programmer to you to see if you can fix the output stage of the CH relay driver for another vid.

[SwichMad]

Exceptionally well explained - helped me understand my heating system without any prior knowledge of heating systems wiring. WIFI thermostat inbound 😊

[Carl-rezb]

Hi J.W.. as a heating /plumbing engineer with no love for electrics.. (my colleague does all the electrics), i have realised how necessary this aspect of the heating game is when it comes to fault finding.
Because of your clear video instructions, i have not only begun to understand this but I also quiet enjoy this new found element of learning.
Thank you sir and keep up the good work.

[KembleSteve]

Still a very professional explanation of this topic, avoided by many. Many thanks.