Putting in stove/back boiler with rads

[Tomtom821]

I'm looking to put in a solid fuel stove (about 30,000BTU) in an existing fireplace and run 3 small and 2 medium radiators off it. It's in an apartment with an attic, there is only electric storage so will need to install the radiators, piping etc. I'm am thinking of installing a flow return system with Pex piping. Just wondering if this is the best way about it? If running the pipes up and down to the attic and back will have much effect? and how much more hassle putting hot water onto the system will be? Will be getting a plumber to look over it but would like to do most of the work myself. Any help would be great.

 

[DavyJones]

unless you are have an above average understanding of plumbing I would advice agaisnt doing it yourself.

A solid fuel stove has no safety shut down if something goes wrong EG pump failure or power cut. If for any reason the pump stops pumping hot water out of boiler, the water in the boiler boils and creates steam and lots of pressure resulting in stress on pipework and boiler and maybe a very big bang.

For this reason you should run 1" flow and return from stove to cylinder or heat dump. This will allow natural circulation(no need for pump) if piped right. the flow and return must be unobstructed, I.E no valves between stove and heat dump. You tee off this main lines for your radiator circuit.

At the cylinder you should have a thermostat on the flow, when it reaches the required temp, the thermostat sends power to the pump that is fitted on radiator system and hot water is circulated to rads.

If power cut etc, the stove will still circulate to cylinder hence.

A 3 bar pressure relief valve should be fitted on the flow of stove as close as is practical.

Best to do your homework as it is vital to position expansion pipe and cold feed on system correctly.

If in doubt, pay a pro to do it for you as things may go bad if you get it wrong.

 

[BurritoQueen]

Have you thought of getting a pellet fireplace insert with back boiler??....very nice with real 'flames' et al but low on fuel cost and VERY low on ash..... just a thot.