I'm getting a Proven 6KW installed, foundations going in today, I would like a list of what to check, look out for

There have been some tips on this board along the lines of 'Whatever you do, make sure .................'

Or 'double check that the installer has...............'

TSTOP, Start settings?

So I'd like to get them altogether in one place if possible so anybody installing one has a quick point of reference to benefit from all your experience

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CJL