low water cut off

teresad

is there a minumum suggested distance between the primary low water cut off and the manual reset lwco?
if too close and system surges have had some problems tripping manual reset. thaks

nicholas bonham-carter

LWCO distance of separation should not be a problem. What maybe happening is a spike in pressure from a faulty pressuretrol/pigtail could be pushing enough water out into the returns, causing a temporary low water condition. alternatively, the probe [or the water] may need cleaning.
Install a low pressure gauge, on the same [newly cleaned] pigtail with them, keeping the useless 0-30 psi gauge, and verify your pressure.--NBC

KC_Jones

Is this a new boiler? It could also need a good skimming if it's newer or has recently had work done. This can also cause the surging. I agree with NBC sounds like a surging problem not a LWCO problem.