Just getting the labels on my consumer unit in order as I found a few errors when my oven tripped the rcd.
Pretty much identified most now but I am stuck on these 3…
There’s a relay in the main EDF meter energised for Heures Creuses (that’s the Pilote EDF) - that is fed from the 2A disjoncteur, and drives a second, higher current rated, relay (contacteur) - probably the one rated 25A in your photo.
Sounds like someone moved your chauffe eau off the time controlled system - what’s your EDF tariff - Bleu or HP/HC?
The Pilote EDF is - as I said - a relay in the meter, controlled by a signal from EDF so a pair of contacts closes to signify off peak hours. Your “interface” is just two wires which connect (like a switch).
It allows your water to be heated with cheaper, off peak, electricity.
Sorry billybutcher I never saw your text below the picture so thought you just asked “does this help?”
Ah right so they all work together.
No I am not on one of those tariffs. I am not full time at the house so I just have the EDF Zen weekend plus Lundi tariff which gives cheap rate for 3 days and then standard rate the rest.
That would be my guess from what you have said - obviously there is a thermostat.
Clearly it has been on the off peak tariff (heures pleines/heures creuses) at some point as most of the wiring is left behind.
Offhand I don’t know if the relay would switch on for off peak even if you are on the standard tariff - @badger might know, but the fact that someone moved the heater to a “normal” circuit suggests not and that leaving it on the time switched circuit would mean no hot water.
Just to provide more clarity…
There are 2 sockets next to each other in bathroom
1 is controlled on the C16 in pic
2 is controlled via the auto switch on extreme right (in conjunction with the other 2 )
When I first moved in I did have the heater plugged in to the timer controlled circuit but as you guessed I never seem to have hot water when I wanted it.
I also found that if I moved the switch from"auto" to “I” in the hope it would stay on permanently I found it turned itself back to “0”.
So am I right in presuming its no point in using unless I have an EDF tariff that triggers it when needed?
That suggests the signal to switch on in off peak hours only was active - but as you correctly surmise unless you are on an off peak tariff there is no advantage.
Yes, as per the diagram, the 20A MCB /disjoncteur feeds the water heater element, via the 25A contactor (labeled as 20A in the diagram). In turn the contactor control circuit & ‘bobine’ are protected via the 2A disjoncteur.
The dry contact/switch that closes to complete the control circuit during off-peak (Heures Creuses) hours is located in the meter, & you have no access to that, only to connect the control circuit.
Someone has decided to use a general socket for your water heater, rather than connect it properly via a cable outlet run from the contactor. As others have said, using a plug/socket combination is not ‘aux normes’. Whoever did that didn’t understand the way the HC system works (see my last point below).
I suspect not. If you have some form of tarif that uses Heures Creuses then the contactor will jump back to ‘Auto’ if you force it on. It will not/cannot reset to Off.
If you wish to keep an HC controlled item running 24/7 then all you need to do is switch off the 2A control circuit disjoncteur & then move the contactor to 'I" & it will stay on permanently, due to there being no power to operate the contactor.
I’ve never come across the switching capability working on base tarif.
Interesting… I’m guessing they still trigger the HC/.HP switch for that tarif.
