I have not been able to get an answer i can understand to my electrical question about line volt. thermostats. The honeywell t451 has proven itself to be a very unreliable stat. So i bought 6 t498 electric heat thermostats and installed them at 6 different houses. They are working well, with no call backs. Before i install more i called honeywell to ask if this was ok to do?The answer they gave me was that the t451 is a "conductive" stat. & the t498 is a "resistive" stat. there for the 498 should not be used on oil hot water system. The lady i spoke to on the Honeywell tech. support line could explain further. Before i purchase any more and get myself in trouble what do you think. Thank You in advance, From Tom jr
Tom, I think they probably meant inductive, not conductive. Inductive loads, involving motors, transformers, and relay coils, causes more arcing and require contacts that will withstand the increased wear.
Electric heat is a resistive load.
#83096 - 01/10/0301:03 AMRe: conductive vs. resistivve