Too much hot water on boiler stove

[sergem]

Hello,
I have a problem with a thermosiphon boiler stove, which, if I leave it running (during the day for heating) gives me too much hot water for my 100l tank (90°!!). I cannot cut this circuit, the boiler does not work without the hot water circuit.
I can't add a balloon or put a bigger one.
Several not really satisfactory solutions:
- remove the insulation from the tank so that it radiates like a radiator = cold the next day and no more hot water. Tedious maneuver!
- add one or more radiators above in thermosiphon, or with a plate heat exchanger + pump (there I lose autonomy). But the capacity of the low radiator, will it be enough to dissipate the heat?
- insert a coil between the balloon and the insulation and connect it to the circuit with a thermostatically controlled valve which would supply a radiator with a thermosiphon?
................
I don't know, what are your ideas?
Thank you
Serge

[Macro]

Simply add a circulator to the thermosiphon circuit of your boiler, it will balance its temperature with your radiators.

[sergem]

the interest of the thermosiphon is to be able to do without current (too many power cuts for me), the idea of ​​the circulator, ok, but at that time I would have put it on automatically.

[GuyGadeboisTheBack]

You still have the option of a very simple mixer tap (shower, bath) with which you set the desired temperature. I did this for the washing machine in direct contact with the hot water tank. I set it according to the program. Same for the dishwasher.

[dede2002]

Hello,

Your ball is too small. About 2.5 kg of wood is enough to boil it!
If you want to heat with a boiler stove, you have to put radiators...

[sergem]

ok, so no choice, I have to plug it into my existing radiator circuit!?

[phil59]

if you can, that's better.

Currently boiler stove, 8.5+7.5 water, a gas boiler.

When I'm there during the day, from when I "turn on" the stove, until sunset, the boiler doesn't run, several days like that, even with about 2° outside, but at night, the boiler takes over.

tested on our 7 covid positive days.

And yet about 15 kW of radiator behind (part of the house, the rest is just frost-free), while the stove only gives 7.5 kW to the water .... I am the first surprised ... .

Even like that, sometimes the start goes well over 60°... especially when I only use soft wood...

Following the breakdown of my large boiler, I put in a smaller one, and have not yet put the 500L buffer tank back into service.

[Ernesto]

if you can, that's better.

Currently boiler stove, 8.5+7.5 water, a gas boiler.

When I'm there during the day, from when I "turn on" the stove, until sunset, the boiler doesn't run, several days like that, even with about 2° outside, but at night, the boiler takes over.

tested on our 7 covid positive days.

Even like that, sometimes the start goes well over 60°... especially when I only use soft wood...

Following the breakdown of my large boiler, I put in a smaller one, and have not yet put the 500L buffer tank back into service.

So, have you been able to put the ball back in time