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Pressuretrol acting up?

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guzzinerd
guzzinerd Member Posts: 409
edited January 14 in Strictly Steam

Removed this ptrol today on a friend's boiler to clean the pigtail. Noticed the pressure was set just over 3psi so we lowered it to 2psi (1 differential).

Now the thing keeps short cycling at 0.5psi. We tried raising the pressure back to 3, still no change.

Ideas?

1000029188.jpg

Bryant 245-8, 430k btu, 2-pipe steam in a 1930s 6-unit 1-story apt building in the NM mountains. 26 radiators 3800sqf

Comments

  • 109A_5
    109A_5 Member Posts: 3,593

    Did you verify the pressuretrol is actually opening on pressure. Like 24 VAC across the pressuretrol's microswitch when the burner shuts down.

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • guzzinerd
    guzzinerd Member Posts: 409
    edited January 14

    We disconnected the thermostat and the boiler is staying on.. looks like that is the problem

    Bryant 245-8, 430k btu, 2-pipe steam in a 1930s 6-unit 1-story apt building in the NM mountains. 26 radiators 3800sqf

  • 109A_5
    109A_5 Member Posts: 3,593
    https://forum.heatinghelp.com/discussion/comment/1882179#Comment_1882179

    OK . . . That may be a problem, but it sounds like a totally different problem. One is shutting the boiler down the other is the boiler is not shutting down when it should.

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • guzzinerd
    guzzinerd Member Posts: 409

    Yeah. His system needs a lot of tuning. Bad traps and vent, poorly pitched rads etc.

    Bryant 245-8, 430k btu, 2-pipe steam in a 1930s 6-unit 1-story apt building in the NM mountains. 26 radiators 3800sqf

  • patrykrebisz
    patrykrebisz Member Posts: 66
    edited January 14

    (message ment for another thread)

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