Boiler Kettling Revisited...

KenLockett Posted By KenLockett, Jan 1, 2013 at 1:32 AM

  1. KenLockett

    Minister of Fire 2.

    Dec 27, 2011
    Eastern Upstate NY
    Thanks everyone for the excellent feedback and ideas. Let me process all the information and give some of these items a try. I will report back with what I find.
  2. hobbyheater

    Minister of Fire 2.

    Nov 14, 2011
    It is a 1 1/4" check valve in a 1" system and does it all the time.
  3. Clarkbug

    Minister of Fire 2.

    Dec 20, 2010
    Upstate NY

    I was just thinking that if you are boiling the water, having a buffer tank would allow you to pump a larger volume of water through the boiler independent of any call for heat from your zones. This could extend your burn cycles, but would also allow you to have a slug of cooler water to run through the boiler, and help eliminate the problem.

    I did call Carlton earlier this year, but he has been booked pretty busy. I need to get ahold of him still to help me with a few things around here....
  4. kopeck

    Minister of Fire 2.

    Mar 24, 2011

    My Solo Innova will run at 600 when the tubes need to be cleaned. After a good cleaning it runs around 450.

    I've never seen the 300 deg stack temps some guy talk about. I often wondered if that was a function where people are measuring their temps (ie how close to the boiler) or what their using to grab those temps (stick on thermometer or a probe type).

    In my case my probe type thermometer is mounted pretty close to the outlet on my boiler.

  5. Bob Rohr

    Bob Rohr
    Minister of Fire 2.

    Jan 9, 2008
    SW Missouri

    Yes, if the system has taken on a lot of fresh fill water, especially hard fill water... I had a cast iron boiler on a customers home that would perculate every few years. I delimed it twice with Hercules Sizzle, a strong boiler cleaner acid. An acid product is the only way to clean hard water deposits. The soap based hydronic cleaners will not touch scale build up.

    Turns out this home had a few slow leaks in the slab radiant somewhere. I finally put a water meter on the fill valve to determine the cause of the scale build up. This was a first for me, on a closed loop hydronic system.

    I have cleaned enough copper tube domestic boilers to know the symptom of a scale build up. Copper tube boilers let you know right away when they scale, the larger the BTU, the more they howl :)

    Cast iron or steel boilers do not have the same flame to HX intensity of a fin tube design boiler, so the noise is not as easy to detect or pin down. Piping will carry noise throughout the system, it can be hard and frustrating to pinpoint the exact cause of the noise.

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