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Posted by Harold Kestenholz on February 20, 2004 at 09:22:21:
In Reply to: Re: Trianco HeatMaker II Noises posted by Brian Halliday on February 19, 2004 at 05:28:57:
The purpose of the thermostat in the factory diagram is to keep the boiler above 140F to prevent condensation. I don't know what the sensor on the return is from.
When the basement zone is on, the water temperature in the boiler is lower due to more water flow, so lowering the thermostat could help.
As the building is 6 years old and built to modern insulation standards, a 1300 square foot building requires about 30,000 btuh to heat it, so the smallest unit is twice as large as necessary. A tempering tank to absorb the excess and extend the burn to prevent short-cycling would be useful. The problem is most likely related to small flow when the basement loop is not open.
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