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What could cause this to happen

Mark_72Mark_72 Posts: 30Member
Pressure in return on boiler start up. vacuum system. water pushing up in the return's
? Anybody.
MJS Service's Inc.

Comments

  • nicholas bonham-carternicholas bonham-carter Posts: 7,878Member
    What are we looking at in those pictures?--NBC
  • Mark_72Mark_72 Posts: 30Member
    Steam trap on rad . I tried to put up video but was not able to post. water is shooting up in the returns and causing problems. I have never seen this happen . Vacuum system in an apt building. happening throughout the building . building is 13 stories and a down feed system.
    MJS Service's Inc.
  • AlCorelliNYAlCorelliNY Posts: 63Member
    is it double trapped?
    Al Corelli

  • Mark_72Mark_72 Posts: 30Member
    No double trap. two pipe system
    MJS Service's Inc.
  • AbracadabraAbracadabra Posts: 1,948Member
    Mark said:

    Pressure in return on boiler start up. vacuum system. water pushing up in the return's
    ? Anybody.

    Please provide pics of near boiler piping.

  • SteamheadSteamhead Posts: 13,207Member
    Is the vac pump running when this happens?
    All Steamed Up, Inc.
    "Reducing our country's energy consumption, one system at a time"
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Baltimore, MD (USA) and consulting anywhere.
    https://heatinghelp.com/find-a-contractor/detail/all-steamed-up-inc
  • EBEBRATT-EdEBEBRATT-Ed Posts: 5,960Member
    Is the overflow and vent on the tank plugged or capped.? Are the returns hot, do you have traps blowing through? Any wet returns or lifts in the vacuum system? Is the vacuum pump pulling a vacuum?
  • Mark_72Mark_72 Posts: 30Member
    This happens when the vac pumps are running. The pumps are venting but I have not ruled them out. Steamhead you were in this building apox. 2006. It's a Shipco pump /boiler feed system.
    I am getting some hg 1/2at start and then I've seen it pull as much as 10hg. I just have not been able to take system down to rebuild vac just yet . that is in my plan as soon as we shut down for the season.
    MJS Service's Inc.
  • Mark_72Mark_72 Posts: 30Member
    I'll post some pic's tomorrow
    MJS Service's Inc.
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