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Swap McDonnell MIller 47-2 with VXT 120

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JEMM55
JEMM55 Member Posts: 47
in Thermostats and Controls
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?

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  • astoria2013
    astoria2013 Member Posts: 16
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    wiring

    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, http://www.hydrolevel.com/pages/pdf_files/vxt_120.pdf  has the perfect wiring diagram for the old PS800 and new (page 2)
  • Charlie from wmass
    Charlie from wmass Member Posts: 4,322
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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
    https://heatinghelp.com/find-a-contractor/detail/charles-garrity-plumbing-and-heating
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