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gray honeywell box vs \"internal syphon\"

this is a new gas/steam installation and Im concerned that the "small gray honeywell box" which is set for 2 psi, but the guage that says "internal syphon" reads about 4.5. With the unit not firing for about a half hour, it still reads 3 or so. Is this dangerous? Is the "internal syphon" reading measuring the pressure is should be at, which is set for 2?
Im draining about a cup of gray sludge from the boiler every other day. Boiler cleaning is set up in two weeks.
Is this dangerous that the "internal syphon" reading is passing the 2 psi set on the gray box?


  • Dave_4
    Dave_4 Member Posts: 1,405
    The gage is toast!

    Or the tubing that goes to it is plugged.

    Not to worry. If the cleaning guy has a clue, he'll examine the system, clean and calibrate the Grey box pressuretrol and make the gage right, or replace it.

    Unless your basement ceiling is To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
  • harold campbell2
    harold campbell2 Member Posts: 16
    thanks ken but

    is the "internal syphon" guage measuring pressure that is set on the honeywell or are they measuring different things?
    There are not vents on the mains either..checked high and low, inside and out. If you're in NJ, Id like someone to put in vents on the mains.thanks again.
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