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underpar12
need some advice on connecting up an ac contactor,is a1 ,a2 the neutral connections and 1,3 on top of contactor lives in and 2,4 loads out ,. the reson why is a plumber has ask me to fit a 2 channel time clock to a heating system , the boiler is a heating unit only live ,neutral ,earth, the system has two separte pumps ,hot water and heating only ,no valves .so im going to come of terminal of time clock ,hot water to the live of the pump then from pump to boiler ,the same with terminal of time clock,thinking the only way this can work is if i fit two contactors ,not sure if i should fit them before the pumps or after going to the boiler.or is ther a nother way /??
