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    Swap McDonnell MIller 47-2 with VXT 120 (3 Posts)

  • JEMM55 JEMM55 @ 6:24 PM
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    Swap McDonnell MIller 47-2 with VXT 120

    I want to remove my McDonnell Miller 47-2 and change it to a VXT water feeder.

    There are two wires attached to the #2 switch on the 47, Do I simply wire the VXT into that?

    I have a model PS 800 low water cutoff already hooked up so the manual feeder is redundant with the switch.

    The feeder is old and not working right so I want to change to a vxt..

    Anybody who knows?
  • astoria2013 astoria2013 @ 4:24 PM
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    the two wires from the 47-2 were just part of the switch that cut power to boiler when water was low.  I suggest just splicing those two together.
    Next, if the PS800 cutoff is already wired, run a line and neutral from PS800 to vxt line and neutral.  Then you need a wire from the W of the PS800 to the vxt feed.
    Of course I recommend a good boiler guy do this or electrician, but if you are gonna do it yourself,  has the perfect wiring diagram for the old PS800 and new (page 2)
  • Charlie from wmass Charlie from wmass @ 5:47 PM
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    If the boiler is large enough or

    your area requires it, you may need 2 LWCO's on your boiler. Is the PS8000 an automatic or manual reset model?
    Cost is what you spend , value is what you get.

    cell # 413-841-6726
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