Eddi issues

MuddyDog

Guy who called out didn't see anything wrong and reset it and updated the firmware.

Ran fine for 2 days but then same error code popped up.

I've since increased the device settings from 63A to 64A and also set the device limit from 13A to 8A and it has been 3 days without issue now. Changing it to 8A has meant the max kw sent to the immersion maxes out around 2.4kw according to the app.

bullit_dodger

https://www.boards.ie/discussion/comment/122300173#Comment_122300173

If it's 8A, then that's about 1.8Kw limit, assuming your voltage is about 230v as power = voltage x current. So 8x230=1840w

If your seeing 2.4Kw being hit, then that would infer that 2400/8 = 300volts which is unlikely.

MuddyDog

https://www.boards.ie/discussion/comment/122300796#Comment_122300796

I will double check what it hits on the next sunny day!

But I find it interesting that since I changed it to 8A the EDDI has never thrown an error whereas before it would throw an error and fail a couple of times every day.

I doubt my house built in early 2000s is anything other than the standard 230v either. Perhaps just implies my immersion is a bit problematic when the full 3kw (I've seen it go to 3.1kw on the app in fact for sure) is going to it at times?

bullit_dodger

https://www.boards.ie/discussion/comment/122302901#Comment_122302901

Not so much when the house was built, but more around the distance you are from the local substation. The further away typically the voltage will drop over the line. 250-260v could be seen though and be within "sla" from ESB. it used to be 230 +/- 10%, so 208v - 253, but I think they changed that last year to be 15%. Vague recollection.

Still though, 8A will get the job done for most tanks, just take a little longer of course.

MuddyDog

https://www.boards.ie/discussion/comment/122303376#Comment_122303376

It caps out at 1.9kw. Have seen it touch 2.0kw once or twice but usually stuck at 1.9kw with the 8A setting on the device. So perhaps my house might peak somewhere close to 250v every so often and therefore when set at 13A that'd mean 3.2/3.3kw going to the Immersion and perhaps that causes the issue? I could probably up the ampage from 8 to 11 to see what happens when around 2.7/2.8kw.

EDIT - Set to 11A and it sits at 2.7kw at full power. Will give it a few days to see if everything stays up and fault free at that setting.

MuddyDog

That didn't take long. Froze with the same error when on 11A after an hour or so. Back to 8A I go!

Perhaps the coil or something in the immersion was replaced at some point and isn't rated for 3kw?

graememk

https://www.boards.ie/discussion/comment/122307120#Comment_122307120

Id get onto myEnergi support and see what they say.

What happens when you boost the immersion from the eddi.

An old saying but comes into play here, Volts are given, amps are taken, What the eddi does is vary the voltage that the immersion is given, the immersion always runs at its full current. The eddi doesnt push more current into it.

By varying its voltage it can vary the power (P=VI). but the eddi shouldnt freeze when getting up into the higher powers. No matter what its connected to.

MuddyDog

Unfortunately it has failed at 8A now a few times.

When restarting the EDDI now it loads to a CT error first before changing to Local Comms Error. But the device itself is basically frozen and you have to hold buttons for 10 or so seconds for anything to happen. Serious lag. Video attached shows it if anyone wants to watch it in its entirety.

https://mega.nz/file/AvcUiDAR#MOdk1x3s75RD8osyyW-ykGNzEP7MOMTT46TQ74BtU4s

graememk

Get on to myenergi support and see

micks_address

hi folks,

noticed every time i get a power cut my immersion trips - so i need to open it and press in the rest button. Its weird because i always have it in 'stopped' mode and its set to send reduced power to the immersion.. i only use it at night to heat the hot water. Is there a default power on mode on the eddi like there is on the zappi?

Thanks,

Mick

micks_address

the thermostat on my immersion seems to be cutting out regularly now - worked Sunday night after a reset but tripped last night - less than 2 years old - i guess i need to get onto the plumber to have a look?

Bannerman1969

Same with mine and only a few weeks old. Keep having to reset it

micks_address

https://www.boards.ie/discussion/comment/122625060#Comment_122625060

i was playing around with the flow temp on our boiler, so im wondering if the boiler heated the water above the temp set on the immersion stat would that cause it to pop?

Bannerman1969

Yeah - me too. Have reduced the temp to below 60C now with no issue.

Private Snafu

We've had a solar system recently installed and seem to be facing the same problem as others have regarding an Eddi not heating the entire tank. It's a single dual element immersion that seems to be correctly wired (tank 1 reads 2.8kw, and tank 2 reading 1.8kw, tank 1 set as priority).

I replaced the immersion when we purchased the house 18 months ago, and as far as I can remember the element is as large as the tank can take.

Has anyone actually solved the issue 100%?From reading through the thread I see some who have fitted a destratifcation pump, others a new tank and some who have reconfigured the power limit.

graememk

https://www.boards.ie/discussion/comment/122737265#Comment_122737265

Immersions can only heat water that it touches and above.

As your at your limit already, only other option is a de-strat pump.

But do you need to heat it all? Set a base temperature with your oil/gas and let the eddi boost it up and export the rest.

Private Snafu

https://www.boards.ie/discussion/comment/122737546#Comment_122737546

Happy to use Eddi as a fancy timer at the moment - currently running it scheduled 2 to 3am and then charging batteries between 3 and 6am on Energia EV tarriff.

Unfortunately the heating system has no seperate hot water zone, just upstairs and downstairs zoning, not something we can easily add without significant work due to distance between boiler and hot water tank.

graememk

https://www.boards.ie/discussion/comment/122738001#Comment_122738001

Another option is a Willis immersion, it heats the whole tank as it's an external one. Same amount of faff as a de stat pump

John mac

when i installed my eddi ,i only wired the bath element , set as tank 1 , this way the whole tank is heated , and stat only turns off when full of hot water. . excluding the bottom ~200mm ish

My bottom oil heating stat is at a lower level ,just below the coil . heats to 55° so if using the oil i get a full tank and the eddie boosts to60°

bullit_dodger

https://www.boards.ie/discussion/comment/122738001#Comment_122738001

Unless your getting up at 3am, I'd reverse that logic and have the hot water come on at heat up at 5am → 6am and the batteries charge for the full period. Or basically heat the water as late as you can while on your cheap EV rate.

Assuming you have a decent modern tank with good integrated insulation (as opposed to a tank with "lagging jackets" to preserve the heat which is worse) …. even good tanks will loose 0.5c to 1C / hr while sitting there. No sense in losing 1-2C in water temperature in the middle of the night.

After that, to maximise your hot water availability, you might consider raising from 60C → say 65C. Just bear in mind though that super hot water runs risk of scalding. I wouldn't go above 65C without a themostatic flow control valve.

Private Snafu

https://www.boards.ie/discussion/comment/122755002#Comment_122755002

I had thought the same, but the Eddi drained the batteries heating the water 5 to 6, having read through the myemergi forums there doesn't seem to be a way to stop this from happening.

graememk

https://www.boards.ie/discussion/comment/122756647#Comment_122756647

Keep the charge period of the battery from 2-6am, the eddi won't discharge it then. (And the battery won't charge any more as it's already full.

bullit_dodger

https://www.boards.ie/discussion/comment/122757135#Comment_122757135

+1 on that.