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old Vents from Trane Vacuum System

In case anyone ever sees these in the field, it may help to know what they are. These came off of a Trane vacuum system with a model 210 direct return trap. I don't know why they were removed but because the branches are taking ssssssooooooo long to heat up, they may be going back into service to see if in fact they are bad.

Darin

Comments

  • Steamhead (in transit)
    Steamhead (in transit) Member Posts: 6,688
    We see lots of Trane Vapor systems around here

    and many of them still have those original vents. But we find that while those vents might have worked fine on coal, often they are too small for oil or gas firing. So we replace them with Gorton #2 vents, sometimes two or three at one venting station if needed.

    Measure the length and diameter of those steam mains, so we can see how much venting is needed.

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  • Darin(in Michigan)_3
    Darin(in Michigan)_3 Member Posts: 28
    Old Trane System

    OK. So there isn't alot of steam here and the story of the ways of the deadmen going away certainly pertains.
    This particular vent came off the system and #75 Hoffmans went on. From what I understand there is a compatability issue with this new vent and the old system. It eventually heats up but it seems to take forever(about 45 min) from a cold start. Another company replaced the old boiler with a new Slant Fin and changed out all the vents. Because the HO wasn't satisfied with the original contractor, the company I work for was called in. On my original call, the pressuretrol was set at about 5 psi and the system took forever to heat up. She seemed to think the system was better once the pressure was reduced but me not knowing any better changed the existing #75 vents with new ones. I thought this would insure fast heating. After learning the error of my ways, I'm very tempted to put the old vents on just to try them and see if they work faster than the new vents that were put on. I wish I knew then what I know now.... By the way, what would cause a low pitched harmonic hum loud enough to be heard through the house. By putting pressure sideways at the top of the riser, the sound gets quieter. Should there be some sort of a swing joint or maybe more info is necessary?
    I believe the main is 2 1/2 inch and is about 100 feet total length but that's just an estimate.
  • Steamhead (in transit)
    Steamhead (in transit) Member Posts: 6,688
    If the main is 100 feet from start to end

    and is 2-1/2" pipe, use three Gorton #2 vents at the end.

    If the boiler is somewhere in the middle you'd have to adjust appropriately.

    Is that an oil-fired boiler? If so, the motor or coupling may be slightly out of balance, causing the vibration.

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  • Darin(in Michigan)_3
    Darin(in Michigan)_3 Member Posts: 28
    Trane Steam System

    The Boiler is a natural gas fired slant fin. I was a little confused by the last comment about a coupling or motor making the hum. Could you please clarify?
  • Steamhead (in transit)
    Steamhead (in transit) Member Posts: 6,688
    That would only apply to an oil-fired boiler

    since it's gas (a Galaxy model?) it's probably something loose and vibrating, possibly a transformer?

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  • Darin(in Michigan)_3
    Darin(in Michigan)_3 Member Posts: 28
    Low pitched Hum

    Nope.. No oil. The boss said we had a couple of guys there to try to change the venting. Apparently the original contractor cut the flue pipe so the draft diverter was sitting almost 2 inches of the top of the boiler. We changed the connector and the chimney penetration to get proper height. I guess the guys tried to redo the near boiler header and shifted the boiler some. They never did get the piping apart. The hum wasn't there before, I wonder if the header has lost some of it's give.
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