question about 2 wire feeder..old m and m wf2-24 feeder

Joseph_4

hi
I have a customer with a 2 wire m and m feeder. one terminal is supposed to be hot and the other common. I"m trying to hook it up to a LWCO. neither terminal is marked 1 or 2 and I cant find any old install manuals that tell you which is which. I have attached a picture. does anyone know which is which
Thanks
Joe
HHI Services

Paul S_3

I would just run one of the wires through the lwco....when you test it hook your amp meter to it make sure all is well....what kind of lwco is there?

Jamie Hall

Um... maybe not quite that simple. First, check to make sure that neither of the terminals is internally grounded. If one of those is, that's the C terminal. If not, the question is does it require power to feed, or does it require power to not feed? If it require power to feed -- most likely -- you need a signal from the LWCO which is powered when the water is low. Chances are that the LWCO now is set up in series with the pressurestat or vapourstat and the burner controls... which won't give you the signal you need. There may be a terminal on the LWCO, though, which is powered when the water is low.

MikeSpeed6030

Is this a 24-V LWCO? 24-V control wiring usually isn't polarized, since it is isolated with a 120-24V transformer - you can hook it up either way.

If it is a 120-V LWCO, measure each line's voltage to ground. The neutral will read zero or just a few volts.