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I took out an invensys EMP2 (noisy piece of gear), I was pretty sure it needed the 240v link but having no experience needed to ask people in the know as it were. Searched everywhere and couldn't find an answer or a schematic. Will give it a try tomorrow, thanks for the advice! Used the new...

any ideas?

Hello, I have had to replace my central heating control as it had failed, I have replaced it with an electronic Siemens RWB7 timeswitch. I cannot get the boiler to fire up when the program kicks in. There is only one control circuit as HW and CH are not seperate. The only thing I can think of...