Multi fuel boiler stove pipe layout

[patkelly67]

Hi all, any advice on the pros and cons installing a multi fuel boiler stove using two taps (feed and common return) using the following three options. Hopefully the diagrams are ok, if not what additional info do I need to provide?

Option 1. No injector tee fitted, cylinder return and return from rads teed separately into return pipe, cold feed runs vertically into return pipe.

Option 2. Injector tee fitted, cold feed runs vertically into return pipe.

Option 3. Injector tee fitted, cold feed teed into cylinder return pipe before injector tee.




Thanks patrick

 

[lame plumber]

best advice is to follow the stove manufacturers instructions initially as the first port of call. Sorry but my specs didnt let me see your diagrams

 

[Nostrum]

What happens when the cylinder stat is satisfied at 45 degrees? and the heating isnt on, or the room stat is satisifed?

 

[patkelly67]

What happens when the cylinder stat is satisfied at 45 degrees? and the heating isnt on, or the room stat is satisifed?

No room stat.
Circulating pump kicks in and distributes heat around rads.

 

[Nostrum]

You need a room stat to comply with part L of the building reg's. you also need to ensure the heat can be dissipated in the event of a power failure.

 

[Nostrum]

Also, this work is notifiable to building control.

These types of system should be fitted by a qualified installer. I know a lot of people are trying to save a bit of money and wood burners seems to be making a come back. The bottom line is there is as much danger in fitting this wrong as there is fitting a gas boiler. You've done your homework, but its not quite right and the above points need to be addressed.

 

[AWheating]

as mentioned the cylinder will require to comply to part l of the regs, and part g.

this can normally be done using a cylinder stat, a normally open zone valve and a temp relief valve and discharge pipework. Your hetas qualified engineer can best advise you tbh.

you will probably also require hi and low limit stats on the heating system to avoid thermal shock/corrosion of the heat exchanger.

 

[patkelly67]

Thanks all for the advice.

Patrick