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oopsplumber Member Posts: 14
Hi guys:

I have a CG-6 gas boiler and it needs a vent damper. The guy at my supply house who can be helpfull but can also be an idiot gave me one for a Crown (6" FLUE) and says they are interchangeable. I seem to think they are, as there is only one way to plug the harness in (I THINK) and therfore the wiring will match up fine.

I just want to confirm the above before I proceed. I think I will be OK.



  • Tim McElwain
    Tim McElwain Member Posts: 4,580
    What Make

    was the old damper, what make is the new?

    There basically three that tend to be used D896 From Honeywell, Johnson Controls, and Effikal which is now Field Controls.

    By the way when you click "submit post" it sometimes takes a while to register, do not keep clicking as you will end up with multiple posts. Just wait it will register eventually.
  • John Mills_5
    John Mills_5 Member Posts: 945

    We are in the middle of a hassle with Hydrotherm  over this. Apparently there are 4 wire and 5 wire dampers and they sent us a new damper but it doesn't work with generic Honeywell aquastats. I'm not sure all of the details as a tech and our rep are working on it. But guaranteed, they don't all interchange! 
  • Tim McElwain
    Tim McElwain Member Posts: 4,580
    I have a wire color breakdown

    that goes like this:

    Honeywell D892/896           D80B              Johnson                    Effikal

    yellow                              orange              green                  Hot 1  brown

    orange                         blue & red              white                 Therm 2 orange

    blue                              black                    red                    valve  3 yellow

    black                             yellow                 black                 common 4 black

    The fifth connection is actually just four the fifth is to blow the internal fuse in the primary control so the system can't operate without the damper connected. Once the fuse blows the primary control will not fire with out the damper.
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