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our problems - part 3

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Posted by Sean on June 02, 2008 at 23:33:41:

In Reply to: Re: our problems - part 2 posted by Sean on June 02, 2008 at 23:32:39:

Today they made the changes to the system. It is warm enough that we do not need heat so the house thermostat is rolled back. However, I heard the boiler firing less than an hour after the system had been reconnected and the hot water heater refilled and heated so I went to the basement to watch what was going on. Now, the boiler is firing when the boiler water temperature drops to 140 degrees and continues firing until 180, then stops. The circulator from the boiler to the indirect water heater continues to run until the boiler water gets down to 140, then the cycle starts over again. I checked it three different times, and no domestic hot water was being used. Prior to today, the system had been very efficient. Once the domestic water inside the Gold PLUS 40 was at temperature, and no water was used for washing dishes, bathing etc. the system might not fire again for 8-10 hours. Given the Gold PLUS 40 is supposed to have standby losses of about .5 degrees an hour it seems that something is very wrong. Now I am concerned even more about lost efficiency, about the fact that the system is continuously trying to overheat water that is already hot enough, and more importantly that the HVAC company just doesn't really seem to know how to make the system work right.

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