Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

New steam boiler has unwanted vacuum

JFeathers
JFeathers Member Posts: 1
in Strictly Steam
I just replaced a Weil Mclain LGB-7 that had 5 cracked water jackets. Replaced with the exact same gas steam boiler. System has pressure-trol controls. Upon startup the system will not gain any pressure. Has only vacuum. Neither I nor my company has experienced this before. From the research I have done, at some point in history this building had a Bromell system and was coal fired. The steam venters that are installed are 1A and there are 3 of them throughout the building. Any help or suggestions would be greatly appreciated.

Comments

  • Hap_Hazzard
    Hap_Hazzard Member Posts: 2,846
    There's got to be more to this.

    Is there a vacuum pump? Are you getting any steam out of the boiler? Is this a one-pipe or two-pipe system?



    What kind of vents are you talking about? Hoffman 1As are angled 1/8" radiator vents. Are you saying these are the only vents in the system? Where are they located?



    It might help if you could post some pictures.
    Just another DIYer | King of Prussia, PA
    1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24
  • SWEI
    SWEI Member Posts: 7,356
    Broomell system

    http://www.heatinghelp.com/files/articles/1383/54.pdf is worth a read.  Are the original  trapped union elbows still there?



    I'd love to see that "Combined receiver, Draft-regulator, Gauge, and Relief Valve" in person.
This discussion has been closed.

Categories