Swap McDonnell MIller 47-2 with VXT 120

JEMM55

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

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

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?