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#65 LWCO

I have a customer whose #65 is not shutting the boiler off in a low water situation.

Not real familiar at repairing them, ideas?

Comments

  • Macheat
    Macheat Member Posts: 2
    sorry MM #67 not 65

    my fault its a #67
  • nicholas bonham-carter
    nicholas bonham-carter Member Posts: 8,576
    edited February 2013
    A dangerous situation

    These can be taken apart, but if the interior float, and chamber are full of rust, you may want to replace the whole unit.

    A dry-fired boiler is a great fire, and safety risk.--NBC



    http://www.pexsupply.com/McDonnell-Miller?/
  • Hap_Hazzard
    Hap_Hazzard Member Posts: 2,849
    Manual

    Here's the manual and replacement parts list.



    This problem is what you see if the LWCO isn't blown down weekly. The rust and scale settle under the float so it doesn't drop when the water level falls.
    Just another DIYer | King of Prussia, PA
    1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24
  • ChrisJ
    ChrisJ Member Posts: 15,442
    Cleaning

    I took one apart and cleaned it, afterdwards it worked perfectly. I also showed the owner how to test it weekly with the burner running.
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
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