My tarm is in the 'garage' on the first floor, with a grundfos 15-58 circ on the back, in the typical way. I have a second 15-58 in series with the first one (about 35 feet away) near the distribution manifold in the cellar.
My house has 5 zones (each with its own zone valve), when only 1-4 zones are calling for heat, the one pump does a fine job, but once that 5th zone opens, the water doesn't want to move (so I flip the switch on the second pump).
I could run both pumps all the time to solve my problem, but is there a type of circuit/relay setup that would tell the pump to run only if more than 'X' number of zones are open at the same time?
My house has 5 zones (each with its own zone valve), when only 1-4 zones are calling for heat, the one pump does a fine job, but once that 5th zone opens, the water doesn't want to move (so I flip the switch on the second pump).
I could run both pumps all the time to solve my problem, but is there a type of circuit/relay setup that would tell the pump to run only if more than 'X' number of zones are open at the same time?