short cycloing steam boiler

thfurnitureguy_2

If the boiler is sized right, it won't build build much if any mesurable pressure. Is the boiler shutting off by the stat being satisfyed? Main Vents let the air out of the main pipes quickly so your radiators at the end of the run can heat before the stat turns off your boiler. Low or no pressure on the gauge is a good thing. Check your main vents and post the length of your mains.

ck quinn

short cycling steam boiler

I am trying to touble shoot a non-functioning branch on my one pipe steam system I think the boiler may be short cycling, but need help diagnosing. I have replaced the pressure gauge with a 0-15 psi gauge. The boiler gets up to .5psi, but no more. Even if I adjsut the cut out to 2.5 for testing, the pressure gauge never gets above .5psi and the boiler cuts out. Cut in rate is set at 1psi. One branch on my system seems to work, the other three radiators on another main do not work at all. Likely other issues in additiion.

Thanks for any help

Steamhead (in transit)

Check your main vents

If they're missing, stuck or undersized, steam distribution will suffer. Measure the length and diameter of each of your mains, and tell us what vent is on them.

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

mark smith

additive, or subtractive differential ...???

ck quinn

Not sure what you mean-- the cut out rate on the control says that is it the cut in plus differential. I have cut in set at 1 and differential set at 1. I adjusted differential to 2 just for testing, but pressure gauge never went above .5psi.