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Fulton Steam Boiler

APC69
APC69 Member Posts: 3
in THE MAIN WALL
Fulton Steam Boiler - 6HP
I'm having a small problem with this system, the boiler keeps going off on low water. This boiler supplies steam for two dri-steam humidification coils in two AHU's. This system is 6 months old and all the piping is brand new. The boiler water is treated with chemicals,softner,and is blown down a couple times a day, and the water is very brown. I have had the chemicals tested and that is not the problem. There are two modulating valves controlled by Johnson Controls,one valve is 100% open and maintaining 24%humidity and the second valve is 40-50% and maintaining 40% humidity which is the setpoint of the space.Both AHU'S and Coils are the same size, and are piped with a 1" steam line w/ Condensate return to the Boiler. This Boiler was drained and filled a couple times last week and ran good until last night and failed again. If someone could help me out...because everyone else is pointing fingers at everyone else and nobody is fixing the problem. Thanks AC

Comments

  • Gary Fereday
    Gary Fereday Member Posts: 427
    Take a minute & think like steam

    Seems to me that one coil is doing the major part of the work, ie. heating and humidification. The other one is just coasting along and loading with condensate, and robbing the boiler of its water. So is the piping graded and insulated? Is the piping such that it does not favore one coil over the other. Are all valves open except the control valves. Why is the one coil running ahead of the other? is there seperate controls for each coil or is there just one? ie. how many control valves and controllers for those valves.
    It has got to be a an installed problem. Fulton makes a good boiler. Their compactness make it such that the water level is criticle to operation. That is, there is not a lot of water avalible for making condensate to hang up in lines with out it coming from somewhere. I'd almost bet that the less used coil is slowly filling up with condensate to the lowering of the boiler water level. Is the boiler condensate fed back to the boiler with a pump?
    brain storming
    bigugh
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