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Old 01-17-2009, 06:14 AM   #1
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What should boiler temp be?


Been having a few issues on constant hot water and of 1 day ago we've had plenty for some unknown reason. But I did notice my gauge on the front of the furnace reads about 235 degrees. I have the aquastat set at 160 low and 180 high. What should the gauge read? I believe it works as when the hot water is run the gauige goes down.

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Old 01-17-2009, 09:41 AM   #2
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What should boiler temp be?


Shouldn't rise more then 20 above the high limit temp.

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Old 01-17-2009, 11:13 AM   #3
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What should boiler temp be?


is this a boiler, water heater or furnace?

If it is a boiler 235 is steam and a hot water boiler system will not heat with steam. As to the aqua stat if the boiler temp is 235 and the stat is set at 180 it is not working.
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Old 01-17-2009, 03:22 PM   #4
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What should boiler temp be?


If his guage is accurate for temp.
If he looks, I bet his pressure is above 22PSIG.

So its not steam at 235F if his pressure is above 22PSIG.

But, his aquastat is probably defect if its rising 55 above set temp.
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Old 01-17-2009, 04:17 PM   #5
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What should boiler temp be?


Quote:
Originally Posted by beenthere View Post
If his guage is accurate for temp.
If he looks, I bet his pressure is above 22PSIG.

So its not steam at 235F if his pressure is above 22PSIG.

But, his aquastat is probably defect if its rising 55 above set temp.
Agree; I have had a hot water boiler up to 240F(in a closed loop sytem)long story. Don't recomend that high of a temp for residential, get your aquastat checked.
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Old 01-18-2009, 07:42 AM   #6
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What should boiler temp be?


Take a temperature reading on the hot supply water pipe coming out of the boiler to verify actual temperature.
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Old 01-18-2009, 03:06 PM   #7
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What should boiler temp be?


Quote:
Originally Posted by beenthere View Post
If his guage is accurate for temp.
If he looks, I bet his pressure is above 22PSIG.

So its not steam at 235F if his pressure is above 22PSIG.

But, his aquastat is probably defect if its rising 55 above set temp.
Been you are correct that's why I like this forum, in the field it is easier to pickup on those things. Now that I have to coach techs over the phone I need to hone my analytical skills.
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Old 01-19-2009, 07:04 AM   #8
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What should boiler temp be?


Doing diagnostics over the phone while trying to write up proposals, do accounting, and set up jobs is always a PITA.

Its a real pain, when you get answers back like, the gas pressure is good.
And then you say, how much was it, and they say, I forget.

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