Dimplex quantum 150 single supply O/P tariff screen help please

lilac_dawn

Back to the quantums: my main 150 is single supply. I have set the tariff times on the hidden menu to 01:32 - 08:28 and the other slots 08:28 - 08:28 to prevent them being activated. All fine until I noticed when scrolling though the usual menu, via the dial, that the O/P tariff screen has the first slot as 00:03 - 00:00. I am pretty sure it always used to be 00:00 - 00;00 and there is no way to set it manually.

Does anyone know what it's up to?

I have reset it but that did nothing, It's been on for the last couple of nights and the charging time looked pretty usual but then of course I wouldn't be able to tell if it's charged at the wrong time anyway.Scratch that: I've used checked the day/night readings and although they are not half hourly, there isn't much change between last month's day usage and this month.

Scot_39

This screen shows non charge timings offset from the e7 timings - is it worth setting say the others to 0900 0900 in case its confusing it.

https://help.gdhv.co.uk/support/solutions/articles/79000138589-how-do-i-set-charge-times-on-my-qmrf-

AFAIK The O/P screen you refer to is normally driven off of the ALCS switched secondary wiring - in your case live 24/7 so whereas in dual wired it should read your meter switching around 0132 / 0828 etc - it will never see it off/on.

It's a monitoring output only AFAIK - it tells users what the supply has done over previous 24 hours your heating should follow the set times.

Their are other screens that tell you charge taken - after initial switch on I'd expect as much as 18-20kWh from some heaters - so you could use those. total kWh/c3.3 kW rating on the 150 at nominal 240V.

Its a bit old now - and the displays can vary with versions - but some typical screens - and a guide

https://product-portal.gdhv.com/sites/default/files/Quantum%20Series%20G.6%20Reporting%20Screen%20Guide%20-%20Issue%201.pdf

Take it you havent got 1/2 hourly smart data available.

lilac_dawn

No, unfortunately I haven't got 30 min data. I used to have the Loop app (I think? Or bright?) but it stopped working.
That would suggest it has been charging for that length of time then?!
I can't see anything today as I just reset it.
What's best to do? I set the charge times fine.

Scot_39

Loop went registered only or some such - so maybe why no longer works.

I think Bright still works - but is perhaps overkill to check if heaters being charged at correct rate.

If you can safely reach and able to read your meter - you could compare peak and off peak registers - assuming your on a standard E7 tariff over the next couple of days.

Perhaps easier check you suppliers on line account portal if have a good one or as I did in the end to get daily - try their mobile app - as will likely show you daily kWh used - and whether that use at off peak or peak rates.

Your IHD - if really modern - might split out peak and off peak too - but my old smets1 doesn't - it only gives total register .

My EOn Next app sometimes takes a day or two to update over the weekends but you should be able to look at a few days history soon enough.

As above some NSH takes a lot of energy in early use after switch off - but I dont have a Quantum - nearly did - so studiud the manuals for a few brands (so I am not sure exactly how much a Dimplex would heat up by - out of its c 23kWh nominal max charge (7x3.3 for a 150 at 240V on E7)) - bit it should stand out if doing so.

One of the other brands defaults to 80% charge target - around 18kWh on the Dimplex - for their similar sized HHR model. But how close to that the Dimplex goes ?

lilac_dawn

Yes, I did that already. September day rate usage is the same as now in October - I just looked at the first couple of weeks in Sept and this past week - so going on that I am pretty sure the quantum isn't using the day rate. Does the O/P tariff screen update daily?

Scot_39

Yes it does - but only if device on midnight to midnight - but not sure that or the screen before it is that useful for single wired (3 - the one saying off peak on for 419 mins (7hrsx60-1m reason?) - as that may say 1min short of 24 hours if anything in single wired) - but as I say it's pretty meaningless for single wired - as it just tells you when the signal is live.

Not when your heater actually uses the power - or how much.

So even with ALCS - on for 7 hours - it will say 7 hrs whether or not the heaters charge for 1 or 4 or 7 etc.

In the help link - I think you might want to see if you can see the equivalent of the "History Screen 2" - that actually tells you not when - but how much charge is taken each day. Maybe also a nice number to be aware of - as that what drives the heating cost.

Also be wary about the presence of the was it c1.1kW on 150 boost heater - check the manuals and modes for that - bit hazy on how to disable / prevent auto use.

lilac_dawn

Do you mean switch the boost off - or I think put it so it is drawing from the core (can't remember the exact terminology - basically not drawing on off-peak)? If so, yes, this is off - it's in the hidden menu.
I did find the history screen before I reset it and nothing looked amiss there. One day was 0 as it was milder so didn't charge.