Steam Pressure

Joe_5

I always "crank it down" on all of the residential steam jobs I'm on. Never had a complaint afterward. My question, does a large steam system need more pressure, say like a medium sized elementary school? The boiler attendant keeps his system cycling around 6 psi. The classes are hot on one side of the building and the other side they're wearing jackets. Each room has a puematic tstat which operates a zone valve but they don't seem to control the system so well. I'm just a parent on this job and not the contractor. Any thoughts on what could be wrong? Thanks guys! Joe

Ken_3

If you can heat part of the building I would say the boiler output pressure is Ok.
In most of the US the controls systems are fell safe to heat. If you turn off the air compressor the side of the building that is cold should stat heating. If for some reason there is still no heat I would start looking at the system piping.
Closed valve maybe. But I would say that the pnuematic system needs a calibration.

Ken_3

If you can heat part of the building I would say the boiler output pressure is Ok.
In most of the US the controls systems are fell safe to heat. If you turn off the air compressor for the controls and let the system pressure go to 0 psi the side of the building that is cold should stat heating or you can turn each room thermostat up to 90 you had hear the air bled off and the room should start heating. If for some reason there is still no heat I would start looking at the system piping.
Closed valve maybe. But I would say that the pnuematic system needs a calibration.
Just remember to turn the air compressor back on after the test or you may cook the gold fish.

Joe_5

Steam Pressure

I guess it could also be a loss of air pressure to the one side of the school if those zone valves fail open. Thanks for the idea. Joe