Heat Leak radiator - Where to tee-in ???

[seva]

Hi

I would like to put a heat-leak radiator in my wood stove heated system to allow for some heat dissipation should my circulation pump fail (or the power grid...)

I have a wood stove gravity feeding an indirectly heated HW tank and a pumped heating system (6 radiators)

I have a few questions and points I need to clarify...

Do I tee off the inlet to my leak rad before or after the inlet into my water tank ?? Im guessing after (i.e. higher up) otherwise it would normally get all the heat intended for the tank right?

Secondly - Does it have to actually be a radiator or could I use that second indirectly heated water tank that I have lying about in my yard not doing very much instead ?? This would presumably then act as a secondary heat store which I could use for erm... something. I guess I would need to vent this into the f/e tank in case it also got very hot (or would it need it's own)

Would i use some kind of valve on the inlet pipe to my leak rad so that it only got used when the power was off so that it didn't steal the heat all the time? Presumably I only really need it to kick in when the circulation pump for the heating system is off and only the hot water tank is being heated.

Thanks for any info 🙂

 

[ecowarm]

Look here seva some good info http://www.oilstoves.co.uk/webdocs/articles/Wood_-_Solid_Fuel_Boiler_Plumbing_Diagrams_03-06-08.pdf

 

[seva]

Thanks eco..
Couldn't help noticing that in the document you linked me to the feed to the heat-leak radiator is BELOW the feed to the coil in the water tank.
In this picture however (attached) the feed to the heat-leak radiator is ABOVE the feed to the coil in the water tank, lol, So I'm still confused on that one... Lots of other great info in there though. Thanks for the link 🙂

 

[ecowarm]

As long as the flow rises and the return falls to/from boiler it will be ok

 

[seva]

That's cool, (or hot, lol)
What do you think of the idea of a secondary tank rather than a radiator. Does it have any merit?

 

[ecowarm]

That's cool, (or hot, lol)
What do you think of the idea of a secondary tank rather than a radiator. Does it have any merit?

I can't see the point in that if you probably get all the hot water you need anyway. whats the output of the wood boiler?