Temporary use of electric 'instant' water heater

[JohnW2]

As you hadn't offered that information in the first place many of us assumed, as we now discover, incorrectly that the cable size to be fitted or already installed of the wrong size.

I didn't "offer the information" because, as I keep saying, I was NOT asking about the electrical aspects of what I'm talking about, since I am perfectly happy about them.

Kind Regards, John

 

[JohnW2]

If it's a decent one, you get no water out of it at all.

Why not? I thought they just 'added the amount of cold water" required to achieve the desired output temp - in which case they would not add any cold water if one were asking for an output temp which was as high, or higher, than the temp of the incoming hot water?

From what you say, I guess they must work differently from that?

Kind Regards, John

 

[JohnW2]

Including the MCB? ... A potential continuous 45A load on the 40A breaker has to be pushing up on the curves, no?

Yet another unsolicited response about the electrics

What part of "... if a cable satisfied the requirements for a 2-mimute shower, it would be deemed to still be OK if the shower lasted for 2 hours, or even 2 days." (which is what you quoted) has got anything to do with an MCB ... and, in any event, where did "45A" come from?

 

[Murdochcat]

This should be in the plumbing section and the OP should crack on as he seems intent on doing - then update us with the results

 

[Harry Bloomfield]

However, yet again, I did NOT ask about electrical aspects of what I proposed.

Rather than a mixer, why not simply emulate an electric shower?

An electric shower type shower head, temperature sensor, temperature feedback system, controlling a triac, controlling the water heater.

 

[Murdochcat]

Yet another unsolicited response about the electrics

What part of "... if a cable satisfied the requirements for a 2-mimute shower, it would be deemed to still be OK if the shower lasted for 2 hours, or even 2 days." (which is what you quoted) has got anything to do with an MCB ... and, in any event, where did "45A" come from?

If you don’t want electrical comments don’t start plumbing threads in the electrical section

Simple

 

[BlueLoo]

Yet another unsolicited response about the electrics

What part of "... if a cable satisfied the requirements for a 2-mimute shower, it would be deemed to still be OK if the shower lasted for 2 hours, or even 2 days." (which is what you quoted) has got anything to do with an MCB ... and, in any event, where did "45A" come from?

Triton instaflow 10.1kw heater demands a 45A mcb in the IOM.

You'll be getting 45A as well if the voltage drop is anything notable.

As for use with a mixer shower?
You will need the unit to be set to max temp. Might be a problem when washing the dishes where the hot water isn't tempered by a mixer

 

[JohnW2]

This should be in the plumbing section and the OP should crack on as he seems intent on doing - then update us with the results

I would saying that it's right on the borderline between the two disciplines.

However, since you are always going on about threads "being taken off-topic", why are you seemingly criticising me, rather than criticising all those people who have replied about imagined issues that I was not asking about?

As for what I am "intent on doing" if I had such intent, I would not be asking for advice as to whether or not what I have suggested would be a reasonable approach.

 

[JohnW2]

If you don’t want electrical comments don’t start plumbing threads in the electrical section ... Simple

I just want ("on-topic") answers to the question I asked.

 

[JohnW2]

Triton instaflow 10.1kw heater demands a 45A mcb in the IOM.

Maybe they do. As I keep saying, I don't need, and am not asking for, electrical advice., If I do aomething such as I have suggested, I will ensure that the electrical aspects are dealt with to my satisfaction.

You'll be getting 45A as well if the voltage drop is anything notable.

Eh? Can you explain that?

As for use with a mixer shower? You will need the unit to be set to max temp. Might be a problem when washing the dishes where the hot water isn't tempered by a mixer

Yes, that's a potential issue. However, I doubt that the dish-washing water would be any hotter than that coming out of the taps in many a hotel I know

Kind Regards, John

 

[JohnW2]

Rather than a mixer, why not simply emulate an electric shower? ... An electric shower type shower head, temperature sensor, temperature feedback system, controlling a triac, controlling the water heater.

Thanks for an on-topic response!

I thought that would be essentially what I would be doing by feeding a mixer shower from the water heater. However, to have a sensor in the shower controlling the water heater would be a problem, because of the need for the heater to also supply taps.

Kind Regards, John

 

[Murdochcat]

I would saying that it's right on the borderline between the two disciplines.

However, since you are always going on about threads "being taken off-topic", why are you seemingly criticising me, rather than criticising all those people who have replied about imagined issues that I was not asking about?

As for what I am "intent on doing" if I had such intent, I would not be asking for advice as to whether or not what I have suggested would be a reasonable approach.

It’s not border line as you make it VERY clear you don’t want electrical input - so it’s a plumbing question

 

[BlueLoo]

Maybe they do. As I keep saying, I don't need, and am not asking for, electrical advice., If I do aomething such as I have suggested, I will ensure that the electrical aspects are dealt with to my satisfaction.

Eh? Can you explain that?

Yes, that's a potential issue. However, I doubt that the dish-washing water would be any hotter than that coming out of the taps in many a hotel I know

Kind Regards, John

You may also have the issue of having to have a low flow for high heat on the mixer, this risks a problem of someone flushing the ****ter whilst you are in the shower, although thermostatic should be safety limited. Not ideal.

Then again, heat gain is constant in the heater so low temps mean higher flow.
You could possibly just use the output direct in the shower (after all, this effectively what the unit is) and be hot enough for kitchen. Or at least temporarily.

So no, i see no issue that can't be resolved with some twiddling on the day in hand.
Pita long term though.

 

[JohnW2]

It’s not border line as you make it VERY clear you don’t want electrical input - so it’s a plumbing question

I don't want input regarding the electrical wiring of a water heater, since I know at least as much about that as those who are offering unsolicited advice/comments. I do want comments about the suitability and performance of an electrical water heater used in the fashion I have mentioned.

 

[JohnW2]

You may also have the issue of having to have a low flow for high heat on the mixer, this risks a problem of someone flushing the ****ter whilst you are in the shower, although thermostatic should be safety limited. Not ideal.

That's a problem with mixer showers fed by combis, but I would have expected (rightly or wrongly!) it to be less of an issue with what I'm considering.

Then again, heat gain is constant in the heater so low temps mean higher flow. You could possibly just use the output direct in the shower (after all, this effectively what the unit is) and be hot enough for kitchen. Or at least temporarily.

If I understand you correctly, that's essentially what I was talking about in my exchange with flameport - possibly even not supplying cold water to the mixer at all, hence relying on the heater to determine the maximum temp.

So no, i see no issue that can't be resolved with some twiddling on the day in hand. Pita long term though.

As I've said, I'm definitely not talking, or even thinking, about 'long term'.

Kind Regards, John