On Tue, 28 Nov 2017 01:58:12 -0800 (PST), whisky-dave
wrote:

snip more of dave's bizarre ranting's


Switch the NoII / 1300W position on *only* with your current
measurement plug in place, and the main stat on full, see if it cuts
back to 700W or *at all* or after the ~2 hours you mentioned
previously.

and that would prove what exactly ?

That the radiator could *continuously* run on the larger element on
it's own and therefore possibly give off more actual heat than when
it's cycling between the 700W and 2kW (nominally).

At the end of the day, the trick would to be to keep the surface
temperature of the rad as close to the overtemp trip as possible but
without tripping.

I know that the overtemp protection which sets the heater back to 700W kicksm in whenn the fins of teh rad. reach about 98C and when it gets down to about 80C it goes back to the ~2KW or whatever you set.

I know. Remember, you don't have to remind me how it works because I
explained that to you. It would only go back to the ~2kW, not
'whatever you set' because the 700W element isn't protected by the
overtemp stat and wouldn't be switched in.

If you *just* have the larger element on and it still cycles on the
overtemp stat the wattage will go between ~1700 and 0.


If it still overtemps with just the high power element on, try it
again with just the low power element (NoI, 700W, it really shouldn't
with just that because 1) you said it doesn't anyway 2) the rad should
be able to dissipate 700W (when not covered)).

Yes I know and it does.

Just to be clear here ... you do know that it doesn't cycle on the
overtemp switch when just running the larger element on it's own?

Cheers, T i m