On Thursday, 9 November 2017 12:28:28 UTC, T i m wrote:
On Thu, 9 Nov 2017 04:07:20 -0800 (PST), whisky-dave
wrote:

snip

In addition to what has been mentioned elsewhere, the link suggests
you have a 3 level (switchable) heater, where one element is ~700W and
the other 2000-700 = ~1300W.

Yes that seems reasonable.


So, you have choice of output powers of (nominally) 700, 1300 and
2000W.

Yep.
So if a heater is left on in the III position and the thermostate fully clockwise in it's maxium position what electrical power will the heater use and how much will it cost to leave it on from 9-5.

Assuming the thermostat never trips off .

So what power will one radaitor consumer when set to maxium on and the thermostat doesnlt trigger ?



and so the heater is on for
the entire time then (ignoring and load / wattage variations) then it
will be 17 - 09 (hrs) x 2 x (so 16) x whatever you pay per kWh for
your electricity (20p?). So that's £3.20 / rad per day (worst case)
but that soon becomes over 60 quid per weekday month (~£240 / q /
rad).

Sorry I don't understand the calculation where does 17 come into it and where does 9 and the x 2 come into it.

Lets just keep it simple with ONE radiator that is 2KW.

That's the sort of things I'm curious about as at 9am the temerature was 14C
it is now 12 midday and teh temerature is 15C (so still below the recommened 16C as stated in the 1992 factories act section 7.

The heaters aren't powerful enough for that environment.

yes I know and it makes me wonder what sort of genious has decided to order them about 20 was the last count, still waiting for them to arrive.


The thermostat *should* function on all / any settings (so you should
measure 700, 1200 or 2000W or nothing).

Yes I do pretty much get those results.
I aslo tested the impedence which seems to be 25 ohms to 65 ohms from memory as I can't find the paper I wrote it down on a few days ago.

Ok.


The 'overtemp' switch should also work on all / any and that may or
may not cut in (open) before the thermostat does, depending on what
wattage you are using (input energy output load).

The 'on' indicator may or may not indicate it is heating or that it is
just on (depending where it is in the circuit).

Yes I know, so with both lights on what power should the heater be running at.

2kW (if I understand it right and how I would expect it to work
logically).

I too started thinking logically, but the facts showed something else.

So why was it showing 705W ?

turns naround to check actually it's currently 718W

This is my question.

So far I've tested 3 and they are all very similar so I doubt it's a faulty product.


Anything else would suggest that it's either wired incorrectly, or is
supposed to work like that (instructions)?

Well the instuctions are on the site, but are not the same as the ones delivered but look the same with very similar specs and look pretty much the same.

Ok.

Cheers, T i m