Hey guys posted a simular thread earlier regarding a dol starter, anyways popped down to check it out tonight, everything's seems to be ok, iv...
I have a number of 22kw heater sunning of 3 phase supply. There is a dial with 4 settings 1 being the lowest output 4 the highest.
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Just had a callout to an immersion heater making wierd knocking sound within 30 seconds or so of being switched on. Seems to be the...
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