Banging boiler idea?

[pornodoll]

Hi everyone.

I am looking for some thoughts on this idea.

I have an old wall mounted baxi boiler which bangs quite loudly when it shuts down. I also have automated valves for the central heating and hot water. My idea is this:

When the thermostat shuts the boiler down, I believe the valves shut and the pump cuts out straight away. Presumably, along with any scaling in the boiler, this trapped water then boils off and bangs.

Would it be possible for me to get the valves to stay open and the pump to continue running for a minute, to cool the boiler slightly, before they shut down?...Thus hopefully curing the flashing off?

Any thoughts would be very appreciated. I am a little wary of trying descalers in case I cause myself biger problems.

Thanks in advance.

 

[ChrisR]

WHich Baxi boiler - they made the odd few models..

Look in the instructions for "bypass" requirements. Normally, esp bigger boilers, the pump would keep running after the boiler stops, to dissipate heat.
Its the open valve(s) which tell the boiler to come on, not the other way round.

 

[Agile]

I think that I can work out what you have.

If you are a little clever with electronics you could devise a simple circuit to keep a valve open and the pump on until the temperature drops or for a time delay. You will probably need a SPCO pipe stat.

Simple for me but I dont know about you!

Tony

 

[Soggy_weetabix]

C'Mon Tony...

Whats simple to you is never simple to a DIY'er!

You are highly trained in electronics and you post replies accordingly.

Pump overrun works for the 'numpteys'

David

 

[Agile]

We must not over estimate some of these DIYers.

There is one with an Ideal C28 who clearly thinks that he has more idea of whats wrong with boilers than I do !

Quite a few of the people trying to fix their own boilers are quite knowledgeable with electronics. They dont always take heed of what they are told though. A friend of mine who is VERY good with electronics was trying to fix another friend's T3 and I told him to check the expansion vessel pressure.

After nearly an hour it transpired he was fiddling with a chromed expansion vessel only 75 mm in diameter!

Tony

 

[ChrisR]

I think that I can work out what you have.

Ok so now Tony's psychic, he knows what model boiler it is! Jolly Good!

If you are a little clever with electronics you could devise....

If you were a complete dork you could go putting a suite of computers to solve a problem which doesn't exist. No electronics would be necessary or remotely desirable to do what the poster is asking for! (A standard overrun stat and a relay if there's no bypass, would be all...)

However, nothing in what we know implies that anything like that will be needed. The problem is a perfectly standard one which will yield to ordinary measures and doesn't need a pseudo "clever" answer.

Pornostar, If you tell us the boiler model...

Simple for me ....

Really?

 

[pornodoll]

Ok. Thanks for the replies....but is there a simple way to do it coz i'm not phsycic

Thanks.

Pornodoll.

 

[doitall]

Ok. Thanks for the replies....but is there a simple way to do it coz i'm not phsycic

Thanks.

Pornodoll.

The suspence is killing me

Tell us what the dam boiler model is