Alpha cd24r help!

[Jay bailey]

Hi

i fitted a alpha last week, a heat only y plan system boiler. This was a replacement for a old heat only. And I can only get hot water if I have the heating on! I think it might be the 3 port valve but just need a second opinion. Can someone please help me as the customer is not happy. I haven't done anything to the wiring apart from the connections to the boiler and I have had them checked by a sparky.

I checked the system with the old boiler before I replaced it and it was operating fine.

Thanks in advance
jay bailey

 

[Rickster123]

Is it a system boiler or a heat only boiler?

 

[Jay bailey]

Heat only

 

[Dotty]

Jay, I need you to increase your post count to 10+ then send a pm to either Gas man or Redsaw who will then check you and then give you access to the gsr private forum where we can answer this safely.

Thank you.

http://www.ukplumbersforums.co.uk/central-heating-forum/42241-notice-gas-safety-related-advice.html

 

[Jay bailey]

Sorry I'm new to this. Do you want my gsr number?

 

[Dotty]

I know Jay. Not getting at you mate but we have a policy on the forums not to discuss anything on open forum that could be used by the public to attempt diy repairs on their own boilers.

Build your post count up to 10, easily done, just join in a few other threads, go to the introduction forum and say hello, join in the off topic chats etc, them send a private message to Gas man - View Profile: gas man - Plumbing Forum | Plumbing Advice | Plumbers Forums | A forum for plumbers advice in the UK or Redsaw - View Profile: REDSAW - Plumbing Forum | Plumbing Advice | Plumbers Forums | A forum for plumbers advice in the UK with your gsr details.

You'll be asked a couple of dead easy security questions to check you're keeping yourself up to date then you'll get a nice shiny yellow badge and the key to the gsr private forum.

Welcome to the forums by the way.

 

[Jay bailey]

Thanks mate

thats brilliant. Really appreciate your help.

Nice one.

 

[Dotty]

Mind you, now i've re-read your op properly........

This should help!

Honeywell Y-Plan Explanation

 

[Killy Bing]

Long shot but could it be a c plan programmer... Didyou replace it?

 

[Jay bailey]

Top man croppie

 

[Jay bailey]

No didn't replace the programmer 1king55. It's a 2 channel programmer so I didn't think of changing it.

 

[Killy Bing]

Ahh i was thingking w plan not c plan but even then you wouldent have that issue, ignore me

 

[Ollieg]

3 port will not cause this problem. Programmer or cylinder stat.
HW only does not move a 3 port. Switch live comes from stat nc.

 

[Jay bailey]

3 port will not cause this problem. Programmer or cylinder stat.

Do u think changing them both will sort the problem. It was all working fine before. Is quite log tho

 

[Jay bailey]

Sorry that was ment to say old

 

[Rickster123]

Do u think changing them both will sort the problem. It was all working fine before. Is quite log tho

You know for a fact that it was working before?

 

[Jay bailey]

Yes I alway check if poss before I rip out.

 

[Ollieg]

Very easy to test.
Take your time and learn form the job.
Not sure if I can tell you how on here.

It could be a broken cable, so I would change until I knew for sure.

 

[Dotty]

Not sure if I can tell you how on here.

It's not the boiler Ollie, you're ok.

 

[Ollieg]

With programer calling for hot water you should see 240v on 'C' on the cylinder stat.
If the stat is calling (cylinder colder than set temp) you should have 240v on 'NC'.
'NC' should be wired in with orange from 3port, which we all know is the magic switch live.

 

[Jay bailey]

Thanks mate that's really helped me out! Life saver.

 

[Ollieg]

Should Not have 240v to grey when there is a demand from Cyl stat AND programer.

If you do. You need to find which unit (stat or programer) is faulty.

 

[Jay bailey]

Thanks again mate. Top man!