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Aquastat controling Unit Heater
I sketched out the piping arrangement for a hydronic unit heater in my basement. I'm wondering if this piping arrangement or temperature settings are right or if I should reconfigure it somehow. If I give it a call from the thermostat, the zone valve kicks the boiler on, but it takes a very long time for the fan to turn on. The boiler will actually cycle on and off a few times before the fan turns on.
If I turn the aquastat down, the fan will stay on too long, sometimes when the zone isnt even calling, so it ends up blowing cold air. This is all within 6 feet of the boiler, so I'm wondering if the proximity of the aquastat to the other zone and boiler piping might be part of the problem.
Beyond that though, is this a normal setup? I feel like the ideal thing would be to have a relay enabling the aquastat so that it will only work when the thermostat is calling, then I could turn it down much lower and not have to worry about it coming on when there is no call. Has anyone ever done this?
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