I recently had a new indirect hot water heater installed (had an oil fueled water heater prior) which uses the oil fueled boiler that i use to heat my house. The heating system worked fine before the installation. After installation the main zone of heat would not come on. Plumber came back and fixed some wiring. Now all of the radiators and base board in the house are hot. He claims its due to something called 'floating heat' caused by the boiler turning on to heat the hot water but since the circulating pumps are old, the boiler is sending hot water through to the heating system. Something seems off about this, why wouldn't he have discussed or solved for this during the install? Any advice is appreciated.
Radiators are all hot after indirect water heater installed
- Thread starter tfos24
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Show a picture of the unit. It sounds like a bad flow check.
Thank you very much for your reply. I'm also attempting to attach a video that I just sent to my plumber. It is a video showing the boiler on and running but none of the switch lights are green. Then the boiler turns off and the lights stay the same.
Need a picture showing the feeds. That would be where the flow checks should be. Your pictures show the return side and the auto-feed.
I don't see a flow check. Without one you are getting what is called gravity feed. The hot water rises from the boiler and the cold waterfalls from above creating circulation.
Jeff Handy
Pro Handyman, NOT A Pro Plumber
I think some circulator pumps have a built in check valve, which can fail, and is sometimes removed anyway.
I have never seen a circulator pump with a built-in check.
Jeff Handy
Pro Handyman, NOT A Pro Plumber
