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PressureTrol

Steve Minnich
Steve Minnich Member Posts: 2,868
edited September 2016 in Strictly Steam
Why are more than one or two necessary? One for control? One for limit? Third one?
Steve Minnich

Comments

  • ChrisJ
    ChrisJ Member Posts: 16,495
    edited September 2016
    Often a second is required by code for safety reasons.

    Another reason is as you said, for control of a high / low fire setup.

    In that picture my guess is two for safety and one for control but it's best to wait for a pro to answer that as they will actually know and not be guessing.

    Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.

    Steve Minnich
  • Abracadabra
    Abracadabra Member Posts: 1,949
    better closeup of the pressuretrols? I think I see a manual reset on one of them. But yeah, usually I'd say one is a limit, 2nd is a backup, and 3rd is hi/lo control. Those powerflame burners usually would sometimes come with a hi/lo valve. Not always tho. Honeywell v4062 is hi/lo/off. v4055 is on/off.
    Steve MinnichSWEI
  • Steve Minnich
    Steve Minnich Member Posts: 2,868

    Thanks for the help.

    This is as close as I have.
    Steve Minnich
  • Abracadabra
    Abracadabra Member Posts: 1,949
    It looks like the one on the right, by itslef is the manual reset one. I'd guess one of the two on the left is the hi/lo, if the burner supports that, and the operating limit. Can't really say much more without checking the wiring.

    I see what appears to be a nipple to somewhere between the two pressuretrols on the left. But then there's also 2 pigtails on the left. Not sure where that nipple goes.
    Steve Minnich

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