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Discuss Help! Am2 coming up and need help with the s plan in the Central Heating Systems area at ElectriciansForums.net

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You are correct it would not work, there is no supply to 15 on wiring centre or 2 on the programmer, neither is there any tank thermostat, as shown you would rely on the solar for domestic hot water.
 
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You are correct it would not work, there is no supply to 15 on wiring centre or 2 on the programmer, neither is there any tank thermostat, as shown you would rely on the solar for domestic hot water.
I only wish I had your understanding on this system haha. Unfortunately as a improver you hardly ever get the chance to work on these and then expected to understand fully the operation and wiring is a little hard. But fingers crossed I did well. Thanks for your messages. Take care
 
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Don't worry, first time I came across a Y Plan I was struggling, it was my daughters house, and I had a new grand daughter and no heat, talk about pressure, no exam can beat that.

It turned out to be one failed micro switch, however on a Sunday to get a V2 micro switch is not easy, so whole three port valve.

However on looking at central heating it seems hard to actually get it to work 100% correct, nearly every system is a compromise. The problem is we are mixing analogue and digital, we have a boiler with an analogue output and the only way is to have all analogue controls, but a traditional motorised valve is on/off, the electronic TRV head is of coarse a motorised valve and is analogue, but we are mixing hard wired with RF linking, and as far as education is concerned your looking at the PLC and scada (Supervisory Control and Data Acquisition) which I only did as level 5 and your at level 3.

There is a reason why people are called heating and ventilating engineers, to my mind engineer means over level 3, and although I have got level 5 it was in electrical and electronic engineering not heating and ventilating, so if I think back I was taught logs, to me this was using log tables (before we had calculators) to help with maths. But today logs is very different, lucky I don't need to know, as I was useless with logs and calculus however I found imaginary numbers easy.

But I took my 'A' level maths late in life, and remember spending a lot of time working out quadratic equations, because some one had missed out the word 'real' in the question, it seems those writing the book had not considered some one who knew imagery numbers would be reading the book.

And this is where answers to AM2 questions can also go wrong, your expected to have limited knowledge, if you have ever seem the science 'A' book and the circuit diagram for a fluorescent fitting you would laugh, as there is no way it would work, the ballast has been completely missed out.

So may be you should ignore the input of a 70 year old and look for help from some one your own age?
 

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