oil combi boiler / wood burner / thermal store

[thomo5949]

Hi all,

I'm looking and installing a new heating system in my home. I have an existing Grant V90 oil combi boiler and I want to utilise a Dunsley Yorkshire stove with back boiler. I was intending on connecting these to a Gledhill Torrent T210 open vented thermal store. From the thermal store I will supply my DHW and space heating.

I have a could of questions I would apprieciate help with:

1; In the manual for the oil boiler it states it is for sealed systems only. Will this work if the thermal store is open vented.

2; Can anyone suggest an effective method of connecting the 2 heat sources.

Thanks

 

[Agile]

You cannot use the oil boiler unless the thermal store has a heating coil. Some do and some dont !

Or you might be able to find a heat exchanger but that would usually need another pump and controls.

Best to plan first and get your experienced installer to do the planning to ensure its correct or that you have someone to blame if it isn't.

Tony

 

[kevplumb]

I want to utilise a Dunsley Yorkshire stove with back boiler.

the stove will have to be open vent

 

[Agile]

You can connect your stove to the open vented part of the thermal store if you can find enough connections.

BUT to comply with safety needs that connection would probably have to be a gravity circuit with the thermal store above the stove.

There are many design requirements and system design is best left to an expert although if its a new appliance the makers will often give a lot of help.

Tony

 

[Norcon]

Get rid of the combi and fit a regular boiler then both systems can be open vented.

Consider fitting a flush dump valve (ie watts or Honeywell TS130) to the HW coil to dump excess heat instead of wasteful heat leak radiators.

If you're in a hard water area avoid HW coils like the plague.
Consider a gravity system retaining the thermal store HW coil for showers only.
Most cylinder manufacturers will make you a heat exchanger utilising solar coils in a small twin domed cylinder.
A lot cheaper than plate heat exchangers.