PV thermal store

[Kevin1311]

hi all new on this forum and looking for some help with above project.

I want to a OSO unvented indirect stainless cylinder as a thermal store to preheat water before it goes to my boiler. This will run off the emmersion heater controlled by a switch to turn on the heater when electricity is going back to the grid from our PV SYSTEM when we are not using the electricity.

What I want help with, do I use the 210 Ltrs of stored water to connect to the boiler or use the coil inside the cylinder in reverse?

Also how would I wire in a pipe thermostat with a pump to only pump this water to the boiler when it is up to temperature? A wiring diagram would help please.

 

[Dan Robinson]

What "boiler"?

You wouldn't use the coil for this. If I understand your rather vague post correctly.

 

[Kevin1311]

The boiler is Worcester heatslave with its own thermal store of about 75 Ltrs. This has already been modified to with trappings and pipe work to take a secondary hot water supply instead of water from the heat exchanger in the boiler.

Can I supply any other information?

 

[Roger928]

Grant combisol...
http://www.evoenergy.co.uk/wp-content/uploads/2012/07/Grant-CombiSOL-manual.pdf

No electrics required.

 

[AdvanceHelpline]

It wouldn't work as a thermal store, the coil is in the wrong place and is too small.

 

[Dan Robinson]

The OP is confusing a thermal store with a preheat.

 

[ianmcd]

you are using a term "Thermal store" you do not have a thermal store , that is something completely different

 

[Kevin1311]

Hi all can a tmv be used in reverse? So that the hot water from the cylinder enter the tmv from the normal mixed outlet, the hot water from the boiler through the hot inlet and exit the valve to the taps from the normal cold inlet.

I'm trying to set up a system that will take water from a cylinder that is heated by solar energy or from the Worcester heatslave with priority given to the solar water when it is hot and therefore not pass through the Worcester inbuilt thermal store, or fire up the boiler, or let this solar water pass through the Worcester thermal store when cold thus loosing its heat on the way to the taps?

 

[Dan Robinson]

Your project sounds like a disaster waiting to happen. I won't be furnishing you with the drawings and part codes that I have that will make it operate (dangerously) as you intend.

 

[Kevin1311]

Dan Robinson your answer isn't useful at all so why comment. You imply that with drawings and part codes there is a system that will work safely is what I'm looking for and why I'm asking those who might know

 

[Dan Robinson]

It's not useful? Or just not what you want to hear?