broncofan69025

Has anyone ever put 4 furnaces together for a large heat project? My first inclination is to use isolation relays and twinning two at a time but was just wondering before I call the factory, if anyone else has tried this?

mdshunk

Yep, I've seen 4 arranged just as you suggest in a restaraunt/catering hall, but with a little twist. There were two groups of twinned units. Each pair did not have an isolation relay (they had all four transformers ripped out, and one large 1000va one installed remotely), but they went through an alternator relay. The relay used was a pump alternator type relay, so that a different pair came on first each call for heat, equalizing the wear and tear. There was a two stage heat stat used to bring in the second pair.

broncofan69025

sounds like that would work also, What I am trying to do is bring all four of them on at the same time. and was wondering if the twinning wire would work for more than one furnace in parallel so they all receive the same signal?? any thoughts?