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Hi all I have had a bit off a look on the forum after I was sent here from the shop as they could not quite answer my question. The shop said someone here would know.
I have a 3.6kw element which is over kill for what I need. Long story short if i use the DIY Controller and I run it at say 50% my element will be drawing 1.8kw. Will the other 1.8kw of power not going to the element be burned up in the SCR as heat? or will my total draw to the controller and onto the element only be 1.8kw? I like having the large element to heat up the boiler nice and fast but I don't need to use so much power during the whole time I'm running it. I can see in the drawings the POT controls the SCR. Does the POT switch the SCR on and off at a high frequency to control the element? I though POT's were just variable resistors. I would like to not have to waste extra electricity and further more Id like to run my cooling water as a slower rate and save some water too being that I am on rain water tanks.
This might be a silly question but Thanks in Advance