I'm running out of seasoned wood so i've been burning less, the problem is once the boiler cools the oil furnace kicks on but it shuts down before the thermostats are satisfied. the furnace gets down to 130 kicks on and runs till it gets to 160 then shuts down even though the house is still calling for heat. Sound familiar?
tarm 30 no heat question
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Your installer probably turned down your high and low limits on your oil burner. I turned mine down so the oil furnance would not run unless the fire went out. Before I had my Tarm I had my oil set to come on at 140 and kick off at 180, now I think I have it at like 120 and 150, so mine really won't heat the house very quick right now with just oil but I don't want it coming on unless the fire is out.
There are some guys who put in a relay to cut power to the oil aquastat whenever the wood boiler is up to temp (probably from the circ or its aquastat). That way they can keep the oil boiler set high enough to provide heat to the house, but not have it run at all when the wood boiler circ is on. However, I think it takes a pretty good amp sized relay to do it. There are a few threads on it somewhere on here.
What we recommend is simply an aquastat wired between the TT terminals on the fossil fuel burner. This would be an 'open on rise' aquastat (we use a Honeywell L4006A) and would be placed to sense wood boiler temperature. Typically we would see that set at 140F. This means that as long as the wood boiler is putting out at least 140F, then TT is kept open and the fossil fuel burner is not able to fire. Once the wood boiler temp drops below 140F (or near boiler piping where the aquastat is mounted), TT is allowed to close and the burner fires.
In this way the oil burner is not allowed to fire as long as the wood boiler is keeping up, but, automatically takes over once the wood boiler goes cold. No need to mess with fossil fuel boiler set temps either. Pretty cheap, reliable and easy to set up. If you do not have TT on your burner, you can break B1.
In this way the oil burner is not allowed to fire as long as the wood boiler is keeping up, but, automatically takes over once the wood boiler goes cold. No need to mess with fossil fuel boiler set temps either. Pretty cheap, reliable and easy to set up. If you do not have TT on your burner, you can break B1.
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