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Air In A Solid Fuel Heating System.


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#1 jetro

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Posted 09 January 2016 - 03:26 pm

Hi all.
Would anyone know how to bleed the air out of a solid fuel back boiler.
Its a super Stanley 80 range. It was working fine till we put in a new kitchen a few weeks ago and had to shut off the water. Since then air seems to have gotten into the system. Any help would be much appreciated.
Atb j.

#2 Chicken_man

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Posted 09 January 2016 - 03:32 pm

Bleed the rads maybe ?
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#3 jetro

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Posted 09 January 2016 - 03:39 pm

Tryed that chicken man.
Still no good. After a while it will gush out the over flow outside.
I would be worried that it could blow the boiler on me.
Atb j.

#4 Chicken_man

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Posted 09 January 2016 - 04:26 pm

Can't help you mate, but sure someone on here can help.
Pretty sure gruffalogriff will know, give him a pm maybe.
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#5 jetro

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Posted 09 January 2016 - 06:16 pm

Thanks chicken man.
Atb j

#6 mhopton

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Posted 09 January 2016 - 06:44 pm

I'm no plumer but i would first give more information ie what's it heating and how many rads , I'd start by opening the furthest one away and get it firing at full whack to force it out it takes ages so be patient. Is it a direct feed ? It may need to be tracked if pipe is on show follow it to find the cold bit and open the nearest rad . Remember next time you have to turn off to re-fill very slowly hope it's helpful atb Mark

#7 jetro

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Posted 09 January 2016 - 07:23 pm

Hi mark.
Its a super 80 Stanley range.
It's tank fed. Burns soild fuel.
I have 7 double rads working off it.
Its just when I put down a fire in the morning she staryts to bubble up.
Then there is a sudden surge of water out the over flow under the eve.
After that she seems to be fine.
Its just up to that point I would be worried that I would blow the boiler.
Might have to get the Plummer in.
Atb j.

#8 Fellman Mark

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Posted 09 January 2016 - 07:30 pm

You tube ?

#9 jetro

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Posted 09 January 2016 - 07:49 pm

Hi fellman mark.
Going to check it out now.
Atb j.

#10 Fellman Mark

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Posted 09 January 2016 - 09:18 pm

Good luck there's normally everything on there should point you in the right direction

#11 mhopton

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Posted 09 January 2016 - 09:40 pm

To much water in the tank I'd say mate atb Mark

#12 jetro

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Posted 09 January 2016 - 10:56 pm

Might drain the small header tank to see if that will make any differanc.
Atb j.

#13 mhopton

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Posted 10 January 2016 - 07:27 am

Good luck mate

#14 Rake aboot

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Posted 10 January 2016 - 10:35 am

If it is blowing hot water out of the overflow it simply means it`s an open system. It`s not an air lock.

 

 

The back boiler works when a flow of water is set up to take cold water down to the fire, and hot water back up to the tank.

 

This is usually a natural "convection" flow , as a pump might fail,

 

What happens is when the fire gets really hot and the cold water cant flow down fast enough, the water in the back boiler "boils" and eventually the pressure builds up to the point that it shoots up through the pipes and rattles the pipes and blows out of the overflow of the open system.

 

You should never need to bleed the boiler jacket as the cold intake should be at the bottom and the hot outlet at the top so any air will rise and go up with the hot water.



#15 jetro

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Posted 10 January 2016 - 11:03 am

Thanks rake about.
Would you have any idea on how to fix it.
Or would l be better off leaving well enough alone in case I cause more problems.
Atb j.




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