This meant, of course, that safety items like pump over run and, on some boilers (including mine), frost protection were bypassed. On the frost protection on my boiler it would mean that no water was pumped round and the boiler would eventually turn the heat on. Heat on and no water movement in a condensing boiler could result in a quite spectacular explosive boil.
I deduce that the problems with the zone valves was because they were switching the pump load rather than just signalling heat required to the boiler and letting the boiler do the switching.
Where would you wire the pump? Go work out what happens if the heat is on and there is no water flowing.
Where would you wire the pump? Go work out what happens if the heat is on and there is no water flowing.
I know very well how to wire a system.
Including ones that have lots of pumps.
Not much would happen tbh, if the boiler fired up without the pump running the boiler would quickly shut off again as the temp sensors would throw a fault up.From your b*****s comment I presume that you are a "qualified" installer and know what you are talking about. Where would you wire the pump? Go work out what happens if the heat is on and there is no water flowing.
Not much would happen tbh, if the boiler fired up without the pump running the boiler would quickly shut off again as the temp sensors would throw a fault up.From your b*****s comment I presume that you are a "qualified" installer and know what you are talking about. Where would you wire the pump? Go work out what happens if the heat is on and there is no water flowing.
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