I am thinking of downrating my pellet boiler, via dip switch, from 15 KW to 10 KW and potentially running the oil boiler at the same time if the pellet boiler can't keep up with the load on a real cold day.
What I was thinking when I set things up was that the oil boiler would start up if the pellet boiler runs out of pellets. If the buffer tank (110 gal) sensor gets a couple degrees cooler than the temp that starts up the pellet boiler, the oil boiler starts up.
Each boiler, after started, runs until the boiler's aquastat is satisfied.
I am thinking that the heat produced by the pellet boiler will be moved via constantly running distribution pumps to the baseboards, and the house will be at a cooler state while the tank still stays warm enough not to turn on the oil boiler.
I am not sure what would actually happen. Maybe the tank temp would eventually go down, I don't know.
I think my thermostats have an auxiliary heat option to it, but I've looked at that in the past and rejected it, for reasons I don't recall now. Something similar could be the ticket, where the fact that the rooms aren't coming up to temp is sensed and the oil heat is started.
Any ideas? Thanks.
What I was thinking when I set things up was that the oil boiler would start up if the pellet boiler runs out of pellets. If the buffer tank (110 gal) sensor gets a couple degrees cooler than the temp that starts up the pellet boiler, the oil boiler starts up.
Each boiler, after started, runs until the boiler's aquastat is satisfied.
I am thinking that the heat produced by the pellet boiler will be moved via constantly running distribution pumps to the baseboards, and the house will be at a cooler state while the tank still stays warm enough not to turn on the oil boiler.
I am not sure what would actually happen. Maybe the tank temp would eventually go down, I don't know.
I think my thermostats have an auxiliary heat option to it, but I've looked at that in the past and rejected it, for reasons I don't recall now. Something similar could be the ticket, where the fact that the rooms aren't coming up to temp is sensed and the oil heat is started.
Any ideas? Thanks.