Boiler Cycling Problem

Stacey Ericson

The water temp is controlled by a circulator and boiler water tapped directly from the bottom of the boiler. There is a thermostat probe inside the boiler mate that monitors and is wired back to a relay which, if I understand it correctly should tell the boiler when to start to heat the water. It will turn on, however, even after the water in the boiler mate has reached temperature - and there's no other demand for heat - so it seems to me that there has to be another control that's making it start up... If the aquastat is indeed wired wrong, could I tell by turning the limit way down?

Stacey Ericson

Boiler Cycling Problem

My father completed installation of a new Burnham oil-fired steam boiler and 60 gallon boiler mate for my husband and I yesterday. Everything seemed fine - the water got up to temperature quickly, however, the boiler continued to cycle on and off about every minute and 45-seconds. The circulator would come on, then the boiler. We were also getting tons of steam in the risers upstairs even with the themostat completely off. We tried lowering the setting on the Aquastat from 180 to 160 and saw no change. We bled air out of the coil in the boiler mate and again saw no change. The relay was indicating that the water was up to temperature but still the boiler came on. There was no demand on the system for either water or heat, however.

What else could we do to see what's going wrong? Could one of the thermostats be bad or perhaps the aquastat?

Thanks for any advice.

Big Ed

No Control

Seems like the boiler is bouncing off hi limit.Could be a short or it was wired wrong and bypassing the aquastat and thermostat ..

Ken_40

Dad may have forgotten...

to have an isolated D/H/W aquastat wired into the burner control - when ONLY D/H.W is called for?

How is the D/H/W HX water temp controlled? Does it come off the tankless coil; or, tapped directly into a side and/or return condensate pipe that's part of the boiler?

Al Gregory

Probably left the jumper on TT

JOHN_103

what type of boiler steam or hot water?

JOHN_103

i had a burnham v8 steam boiler it was a block replacment for v7 with a indirect it did the same thing i found the well for the aqua stat was to high . it was above the water line. they were using the automatic feeder to mantain water level neededto bring it feeder was only mantaining the minimum level

kevin coppinger_4

is there a

reverse acting t-stat in line to kill the high limit when the boiler water reaches 170 or so...but still allows the circ to run...Any pictures? kpc

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