Hello to all, I'm new to this site. Could use some advise here. First of all I have an old steam system that i have converted. Not your conventional hot water system, but it works. I have blocked off the ends of the main header trunk line so the water has to go thru the radiators, into the return (condensate) side of the old steam system. Anyways I have attached two copies of the way my system is now and how I think I need to add this back-up boiler and heat exchanger. My understanding is with this model 7500 thermostat, I can control two heat relays. My plans are to set the gas boiler temp control a couple of degrees less of the main pump so if outside boiler dies down the main pump is still running and the LP gas boiler will kick on. One concern I have is if I have the tee in the best location between the heat exchanger and gas boiler. The manifold above the boiler is a 4" SS pipe with 1" ports that I made before I decided to buy a heat exchanger and make it a close system.
Does this look like it will work ?
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Topic: adding backup boiler & heat exchanger ??? (Read 1837 times)