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Old 01-22-2021, 01:58 PM   #1
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Aqua Hot System Question

I am new to the Aqua Hot system. I was under the impression that if I had both Electric Heat and Diesel Heat selected, the the Diesel Heat would only come on if the Electric Heat could not keep up. But it seems that the Diesel Heat runs when I would not expect it to. Are there any adjustments that would make this work in this fashion?
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Old 01-22-2021, 02:06 PM   #2
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There are no adjustments that I am aware of.

The electric will cut in before the diesel thermostat but it is limited in overall recovery in comparison to the diesel.

If you are drawing more heat out of the Aquahot then the electric will recover quickly enough the diesel will supplement it.

Just my experience on my older unit.

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Old 01-22-2021, 02:12 PM   #3
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The only adjustment I'm aware of is your thermostat setting and the amount of zone's you have turned on.



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Old 01-23-2021, 12:41 PM   #4
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Don't know what year they changed the design (2005?), but all newer models, both electric element, and diesel burner share the same hi and lo temperature thermostats .
Once your boiler is up to temperature, and it is cold enough outside that you need the diesel, IMO, your just wasting electricity leaving it turned on.
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Old 01-23-2021, 02:34 PM   #5
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It may be supposed to be that way but mine never has. The single electric element just doesn't really do it if there is much demand. It will keep things warm for longer which does reduce the burner time some but not a lot.
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Old 01-23-2021, 02:54 PM   #6
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Quote:
Originally Posted by 96 Wideglide View Post
Don't know what year they changed the design (2005?), but all newer models, both electric element, and diesel burner share the same hi and lo temperature thermostats .
Once your boiler is up to temperature, and it is cold enough outside that you need the diesel, IMO, your just wasting electricity leaving it turned on.
I believe that they changed the thermostat setup in '05/06.
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Old 01-23-2021, 10:04 PM   #7
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The Aqua Hot in your coach has only one internal thermostat. When diesel and or electric is on it turns on both electric and diesel at the same time when the system needs to heat the boiler fluid. Older units had two thermostats but they changed to one because they had too many problems with two.
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