Boiler Control Module Replacement?

Old 03-01-06, 03:33 PM
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Boiler Control Module Replacement?

My boiler is running much to hot to be efficient, I wanted to drop the set temperature from 180 deg F to 100 deg F. The range of my L8148E controller bottoms out at 180 deg F, so I went to find a new controller.

I was pointed toward and purchased an Aquastat Relay (AQ475A) from Honeywell to replace Aquastat Relay (L8148E). While trying to install the new part I have found there seems to be a bit of incompatability between the two units.

The "Boiler Aquastat" node from the AQ475 unit requires 120Vac where the "Burner" node from the L8114E requires 24Vac. What will I need to achieve compatibility, or will I need to find another unit?
Old 03-01-06, 05:06 PM
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Boiler temperature

100º is WAY too low. You will get virtually no neat from 100º water. What type of emitters do you have (fin tube baseboard, cast iron radiators, convectors, etc.)?
Old 03-02-06, 07:08 AM
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100* supply temps? What kind of boiler do you have that will tolerate return temps of less than 100* water?

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