wa2ise,
your understanding is fine,
perhaps at some point those two furnaces had their own pump, while sharing the same 3rd pump as backup.....I don't know....it would make more sense to power each furnace independently,
but that would only allow them to think they are one pump short, instead of utilizing the two spares that are doing nothing.....I did suggest an alternator ....but they didn't respond to that
their intransigence has allowed an already overloaded pump to overheat some more, trip out , and then someone has to run over there , reset OLs and sometimes change fuses , and put the same pump back in service, and occasionally pull a burned motor out.....( Iwas involved with that .how dam stupid is this???
but they are so pleased with the new setup..even with that motor running overloaded...that they are talking about simply replacing three 20hp pumps with two 30 or 40hp..
...and no one will take the time to determine what the cause of the overload truly is !
