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Posted
12 hours ago, MikeSharp01 said:

 

We don't need the immersion to clear the legionnaires risk the heat pump does that. So for now I have wired it straight to the CU breaker via a switch fused unit. So as of now we don't have automation of the immersion but there appears to be nothing preventing me using my contactor approach. The rules are clear that you can put stuff in between those fixed points provided it meets the wiring regs etc which is how the diverters do it. So I won't have any high current stuff on / around the tank other than the connection from Switch Fused Isolator to the immersion heater. 

 

Final job is to commission the heat meter & EmonPi. Hopefully Sunday, then I will have some real data to play around with and get an impression for how good or bad the system is.

You’re not supposed to use a 13a FCU for a constant 3kw device such as an immersion. 
 

You’re supposed to have a 16a breaker and a 20a DP switch as an isolator.

 

 

Posted
5 hours ago, Nickfromwales said:

ou’re supposed to have a 16a breaker and a 20a DP switch as an isolator.

It is, at least that's what I asked for, it doesn't have a fuse anyway. 

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