I have my plumber here right know and we are wondering how do we controll our primary circ. I have a grundfos 26-99 for my boiler/storage tank loop. I want the circ to turn on with the boiler when it gets hot and shut off when the boiler gets cold. Do we use a aquastat in the boiler on the solo 60 or is there a better way with flue exhaust?
primary circ control
- Thread starter jimdeq
- Start date
-
Active since 1995, Hearth.com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.
We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.
We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil.
- Status
Usually a boiler circ is controlled with an aquastat at the boiler hot water outlet. That temp is what you care about if you're deciding whether to circulate through the boiler.
If you're plumbed primary/secondary and you're talking about the primary loop circ (not the boiler circ) then you'd usually turn it on if there's demand from any zone. You MIGHT disable it if there's no available heat source....
If you're plumbed primary/secondary and you're talking about the primary loop circ (not the boiler circ) then you'd usually turn it on if there's demand from any zone. You MIGHT disable it if there's no available heat source....
Thanks for the quick responses. My system is a solo 60 with 1140 gallons pressurized. I tried to follow the Simplest as close as I could. I have a grundfos Alpha fot the zones. I was thinking that if my tanks were up to temp, my primary boiler circ ( grundfos 26-99) will shut off at the point where the boiler is no longer producing heat. Noffosil, would you still recommend the supply? Any other opinions?
jimdeq said:
Sorry - the term 'primary' was messing me up. I'd think of it as the wood boiler circ. You'd want it to run any time the boiler is producing usable heat. An aquastat on the boiler outlet is a pretty good way to do that. There are more complicated approaches, but that's a pretty standard and viable approach. You *might* use a differential control to hold off on the wood boiler circ if there's no zone demand AND the boiler outlet isn't at least a couple of degrees above storage temp. Have to plan to avoid overheat in that situation, though....
We would like to stay simple so on the outlet it will be. Is there a difference between the boiler outlet and one of the tappings on top of the Tarm.
jimdeq said:
I haven't looked at the Tarm but I'd expect the tappings on top of the water jacket would be fine - I expect that's what they're there for. Ask your dealer.....
- Status
Similar threads
