What's inside a tankless water heater 

Probably more than the initial moon landing!

This simple programm could be done with a few lines of assembler on almost any realy small controller for sure...But the bold processors are to cheap today and and the programmers are too lazy to deal with assembler code too...

Have no clue why my comment that is has more than the moon l a n d e r did? Utub is insane.

Nowndays a microcontroller that would outpace all the computing power of the 1950s costs about 5 cents and takes under a watt of power

Exactly my thoughts 😂 also reminded me of small and large bowels.

Except, current doesn't flow.... If this were used here in the UK, if it leaked any amount of voltage to ground up to 30ma it would trip the protection switch.

Who would have thought that stuff like that was actually still being made in Gerrmany.

Fake ,probably made in china you see something made in country other than china you automatically start thinking it is safe

@@andreasu.3546 if there's anything I'd not get for 20 bucks on Aliexpress but made in countries with consumer protection and an (arguably) working judiciary system then it would be the water heater I use in my daily shower

It's because they are useful. Small single phase instant water heaters serve great in summer houses. You can leave them there even for wintertime, cause there is no big water tank like in a boiler, that can freeze up and explode. And it's never an easy job to fully empty that tank.

@@5Dale65 They are useful, absolute. It's just that such cheap home appliancese tend to be made in nearshoring countries like Hungary or Turkey (if not in China) these days.

Lol id just superglue that thing and use it ONE LAST TIME.

@@VJETRA I thought the same thing, but plastic is sometimes tricky to glue. You need to know what kind of plastic the thing is made from

I suggest returning the waste back to the company's HQ.

If this were done as a safety measure, kW water heaters would be the type of device that I would completely accept that for. You don't want your handyman repairing one for you.

I dont understand how it affects the provider wether you use one or the other when you're switching into a resistive load (harmonics ?) May i ask you some sources to read about it ?

@@weistonaski6924 Switching on (or off) at the top of the voltage, creates transient (current-) spikes. So yes, harmonics reflecting back into the net.

How is this complex? It's just a simple feedback regulated heater

This one is typical of an electric shower.

i would just apply some automotive flexseal used for oil pans, in case you have no matching OEM seal at hands.

@@rarbiart silicone gasket maker

It's probably because of liability, can't have random people mess with a device like this where high voltage/ current & heat is this close to water. They might sell spare parts to licensed companies though, i had my stiebel eltron repaired once after a surge (by an electrician).

@@timhartherz5652 All the fixing screws probably have to be tightened in the right order to the right torques too - like an engine block!

Could try to silicone it, worst case it just leaks again, depends on how high the pressure in the pipes is.

@@BitterCynical Worst case it leaks into the electric and the wall socket isn't properly grounded giving someone a good shock. One can try, but the Manufacturer will reject any responsibility.

@@timhartherz5652 they can just write: to be serviced only by qualified personnel, no reason to not sell the seals except to make more money

Fuckin awful practice...polarizing.

Such a pretty much simple device has more processing power then some peoples first computer ☠️

You can try to use flat dish for your cat, probably cat instinct tells them avoid to put their head in such a holes

@@user-ui6xt4fd1f - I will try it.

33Kw For what? An entire apartment building?

@@MrTurboturbine instantaneous water heater require a lot of power. 2 kW tank heater will heat 100 liters of water after 6 hours, and 33 kw heater will heat it in seconds

Yes, with 3.5kW, the water is barely warm with a fully opened tap.

i see quite a number of them in german office buildings. it provides "warmed up" water for lavatory sinks.

@@MrTurboturbine the power required really depends on water input temperature, it gets really cold in germany

At this point, absolutely everything seems to have its phobia and filia...

It was the first thing I thought of when I saw the thumbnail. Too many little holes!! 😅😂

@@DiodeGoneWildBased diode

Whyyyyyy do youuuuu streeeeetch all youuuuur wooooooords? You must at least be able to shorten them? Or is it a trademark?

​@@TheDutchShepherdIRC he's from East Europe so he's got quite an accent, and it just happen to sound like he's lengthening his word 😄

Gas plumbing shouldn't be done new anyway, as methane gas causes climate change. Besides, every use for gas has better alternatives now. For hot water, use a hot water heat pump. For heating the home, use a heat pump. For cooking, use an induction stove. The price is changing too. Solar is absurdly cheap now, and battery prices are dropping quickly.

Because Germany is a developing country??? These are very common in Germany and as weird as it might sound, they are very safe if installed correctly.

They are also Common in developed Countries. These small Units are usually used for sinks which are rarely used and to far away from the Central Boiler to justify a hot Water Pipe. For some reason I have a 36kw unit in my Bathroom and a 17kw one in my Kitchen while the room heating is fueled by the waste Heat from an Incinerator.

They are the best way do get hot water if you have a summer house

just take a photo of the seal with banana for scale, then import this photo to a 3d program and design around it

I thought the same. Ir to make a 3D printed mould for making silicone seal. But likely not worth the time.

step 1 put the cover with the groove in the regular scanner with a ruler beside it for scale, step 2 cad, step 3 print in tpu if it can handle it or print a mold and inject gasket/high temp silicon

@@taist5400 This wasn't meant to be open anyway just glue the cap with silicone sealant, doesn't even need high temperature.

Place the seal on a flatbed scanner with a ruler next to it. TPU would indeed not hold up to the temperature, but as I've replied to someone else: TPU wouldn't hold up to the heat, but you could definitely create a mould in PVA filament, cast with silicone rubber, and dissolve the mould.

Or 3D print

Hi

The electrode heater design has significantly more current passing through the water, and some small amount of electrolysis corrosion can happen even on AC. Not to mention the power would depend on the water conductivity in that situation.

It has a heatsink cooled by the water.

@@DiodeGoneWild You're right of course, I didn't notice it but the cooling block is clearly visible at 2:25.

I don’t think they make them for 24V. To have the same power as the one in the video, you would need at least 150 amps of 24V. You might need as much as a kiloampere if you wanted a hot output with really cold supply water, even if you had a low-flow energy saving showerhead.

@@deltab9768 I have solar panels and AGM batteries, which can sustain 120A for hours. With a NiCr resistance wire instead of the heating elements, I might get enough heat to take a shower. However, this project switched my creativity on. Instead of using a high power heater, I might use a normal one, and make the water circulate in a tank. A 3 kW heater like these, erogate about 300 W at 24 V, and with a small pump, I can heat a 100 Liter tank up to 60°C in a matter of hours, with relatively small currents (10-15 A). We have used this system at work and it works great, when power availability is limited. You switch it on over night and have all day hot water.

No, the leakage current is way less than 30mA.

Yes, because phase-cutting produces harmonic distortion and radio interference (which compliant phase-angle controllers have to filter). In light dimmers those are necessary evils (to avoid creating unacceptable flicker), but there's no need to go to such trouble in a heater like this.

M glad I worked that out in my head before I seen the membrane. Nice.

The Czech name of it "průtokový ohřívač" would also directly translate to "flow-through heater".

TPU wouldn't hold up to the heat, but you could definitely create a mould in PVA filament, cast with silicone rubber, and dissolve the mould.

Using 100Bn neurons for some primitive work?

both are suicide showers in boxes because they use bare wire heaters with no insulation

i was shocked seeing how a device that heats water with live wire like this one can be safe!

It May be Overkill, but If they Order a bazillion of identical Pre Programmed μC which can be used for all Models by adding the necessary Parts it may be still cheaper then a smaller one or doing the Same with Logic. Also the 1€ μC doesn't contribute much to the price of the Unit.

​​@@walterbishop2Stm's are rather expensive though. Lots of drastically cheaper options. Although maybe they got a good deal.

Not really. Most european ones work on 230V 50Hz. They will work fine on 240V 60Hz as well.

@@5Dale65 Sure. All the houses are full of 240V outlets.

​@@ozzymandius666Most American houses have 2 separate phases in them. It is fairly standard practice to connect them together to get 240V for AC units and some other gear.

@@memejeff Sure. All the houses are full of 240V outlets

​​@@ozzymandius666obviously your house doesn't need to be "full of 240V sockets", of course 1 or 2, AC/this heater is enough.

Nothing is more complex than an automatic transmission

Her name is Veritáska ;)

When the microcontroller is powered using a bridge rectified capacitive dropper, it is referenced to a wrong point. It can't control the triac directly.

I wonder how well those would sell

3D printing would work too using TPU

@@sakurojason TPU leaks like a sieve.

@@drobotk Who said anything about selling? It's how others make gaskets for repair jobs.

@@objection_your_honor Then I got a better idea. You could 3D print an injection mold and mold a gasket out of silicone.

or, recommend him an electric heater with a sheathed heating element

@@imeakdo7 You just replied for the sake of commenting? I also forgot to mention the flow-rate of these, same as pissing. They're ok for kitchen sinks, but try to take a shower with that flow-rate.

@@piconano why do you think I replied for the sake of commenting?

Read the text on screen 3:15

The sad reality is almost every company is going slowly towards this.

with an AC current, the electrolytic effect mostly cancels out.

Parts someon may touch, here the water connectors, are wired to the world, so there can't be voltage in-between, nobody can be shocked. One power connector is on the same potential, by the way. But these days a third wire is used. By the way, it's actually possible to have a ground free socket, where someone could touch one power connector at a time. But the existing power grid is grounded. I'm glad you asked.

@@timtim8468 Thank you for helping.

(Copy paste from another reply I made) TPU wouldn't hold up to the heat, but you could definitely create a mould in PVA filament, cast with silicone rubber, and dissolve the mould.

@@AnnaVannieuwenhuyse you could 3D print a mold and injection mold the gasket in silicone.

The gasket doesn't have an easy life. It's exposed to the tap water pressure, the temperature and temperature changes, but also to the water hammer effect (hydraulic shock) when the tap is suddenly closed. This is probably what makes seals fail or pipes burst.

i wanted to say put 0n 8l@5t but 'shadowban' you for using the expression. ridiculous and why my comments are edited. no mistake, just have to go back and make an insignificant change to see if it says 'returned error' underneath in red. if so then the banhammer has already dropped and only you will ever be able to see that comment even if it accepts a subsequent edit. 😡🤬

There is no risk here, so what's your point?

all water pipes are either copper, plastic or lead, and you just mentioned the two that don't cause poisoning.

@@Jules.D think again, copper is a heavy metal, Ugh... lead

@@Andrei9thouzen then what should water pipes be made of ?

@@Jules.D iron, steel, stainless steel, email etc. \Safer materials are more expensive tho.

​@@Andrei9thouzencopper is also a micronutrient. Lead isnt. Not all heavy metals are the same.

I've sealed it inside a rubbish bag 😁

@@DiodeGoneWild 😂 You did well! Before I would remove the transistor.

I've had many heaters, this is junk, but other heaters, the good ones, are often from Germany. German engineering, when done well, is awesome!

(copy paste from myself) Place the seal on a flatbed scanner with a ruler next to it. TPU would indeed not hold up to the temperature, but as I've replied to someone else: TPU wouldn't hold up to the heat, but you could definitely create a mould in PVA filament, cast with silicone rubber, and dissolve the mould.

@@AnnaVannieuwenhuyse You don't need to dissolve the mould, silicone thin wall casting will just come out of a one-sided mould made from PETG even if you have undercuts, because it remains VERY stretchy. Clamshell mould is also an option. Nobody in their right mind wants to print PVA :D Also flat bed scanners are usually dimensionally scary accurate and don't need a ruler. If you need a reference dimension for CAD, you can just as well superimpose it as a line of fixed length in a photo editing software, you can usually set guide markers on the border which are centimeter delimited and then snap and pull an axis aligned line between them.