Variable flow Water Pump for instant water heater?

[Killy Bing]

Its more than sufficiant, youre not replaceing that water with mains so the lowest it would ever drop to would be room temp.

you only need the immersion to keep the temp up.
initually you need to leave it for a few hours to get up to temp but then it tops itself up.
that usually happens once.
unless you want to be special and turn it off after every use.

 

[Gray0689]

So professional advise is get a system that last 10min and take 3hours to recharge.

Well...

Professional opinion you are a real muppet
Croppie do us a favour and ban this tool

 

[DuckyUC]

The reason storage heater so popular is because it use the power during the off-peak electricity in the night time,
It is good for government and power station but not good for user.

Cause the power station need to make sure able to provide the electricity at the peak demand
And most power station cant vary their output in short time ,like nuclear power station,
which is cheaper to run than those can vary output in short time, like gas power station
This mean government can end up building less power station.

Otherwise if the government set the domestic electric supply standard to 3phase 100A per phase
everyone will go to get a 3phase instant water heater which give enough hot water any time
no one will even bother to install a massive water tank which need to maintain,
cost more to transport,install and waste power to keep the temp

Does it explain it better now?

 

[DuckyUC]

Gray0689:

If you like storage, your choice.
I dont like it. Used storage heater for 9 years and never happy about it.

But you dont ban people who not agree your opinion, I dont force anyone to install a instant system,
if you love waiting the water to boil, I dont stop you to do it.
Please respect other opinion!
How can keep saying unvert awsome, unvert great help? It is more like an unvert religion rather than the actual reason to support it.
It seem Only with detail/spec of the model are meaningful advise.

most ppl advise unvert just because they install more unvert than other system, a system easy to install doesnt mean good to use.
As I said above I explained why unvert storage set up is popular, but the advantage are only for the power company and the plumber install it, not the user.

If anyone can give a exact model/detail of set up for an electric powered unvert system that dont run out hot water in 2hours shower and take less than 20min to reheat,
I will apologies to each indivial member who recommended an unvert system.

 

[Killy Bing]

Ahhh ducky.

go spend 2000 on an industrial water heater and stop trying to preach instant hot water.

we know the limits of it.

 

[Gray0689]

You are talking utter nonsense
The power you will need to have the water heated at the flow you want is only attainable by a boiler or a stored water heater ie direct unvented cylinder you have been told this on lots of occasions but choose to ignore the advice
You have been told not to do what you did as wont work
You did it anyway
Then come back asking advice on how to fix it
Case closed and I hope the thread lmao

 

[DuckyUC]

I already get the flow I need, what you mean by "only attainable by a boiler or a stored water heater"?

 

[Gray0689]

I already get the flow I need, what you mean by "only attainable by a boiler or a stored water heater"?

Then why you want a pump
And I meant what I said read it

 

[DuckyUC]

I am not try to get an advise about "how to fix it", I am try to improve it.

 

[Gray0689]

I am not try to get an advise about "how to fix it", I am try to improve it.

Same thing lmao
It didnt work you was told it won't work
Lol

 

[DuckyUC]

The instant heater normally place within 2M from the shower head, as I place it in boiler room the hot water pump can restore the pressure lost when the water pass through the pipe.

 

[Koogatubac]

This topic is awsum, i want in!

 

[Gray0689]

The instant heater normally place within 2M from the shower head, as I place it in boiler room the hot water pump can restore the pressure lost when the water pass through the pipe.

No problem
Ill see you when your back asking how do I get the water hotter after I have added a pump to system
Look forward to reading it
Now I'm out lol

 

[Dotty]

I might start taking an entrance fee!

 

[AWheating]

using your maths you are going to shower with 60degree hot water if you have an unvented cylinder? if so then your maths is correct but the third person wont be able to have a shower, they will be too busy taking the first two people to the burns ward of the local hospital.

chrispy duck LOL

or should i say chrispy duckyUC

 

[Dotty]

And as for differences of opinion......

Only really works when both parties know what they're talking about.

 

[DuckyUC]

The pulsa coil boiler do have an internal hot water pump to increase the pressure too, I cant see the why install a hot water pump will cause problem for the instant heater.
Since the pump can tune the output, I can get the increase pressure at the level I need without temp drop too much.

If you say no to the set up, please give a physical reason to it. Otherwise that will become the fight of religion again.

 

[Gray0689]

The pulsa coil boiler do have an internal hot water pump to increase the pressure too, I cant see the why install a hot water pump will cause problem for the instant heater.
Since the pump can tune the output, I can get the increase pressure at the level I need without temp drop too much.

If you say no to the set up, please give a physical reason to it. Otherwise that will become the fight of religion again.

What are you on

 

[AWheating]

phone the manufacturer of the heater up and ask them.

 

[DuckyUC]

Gray0689:

For your problem , that is why I need a pump can tune the output to stop excess cold water flow.
Even In the worst case the pump wont make difference, but if the plan work then the whole system are way better than the storage idea.

 

[DuckyUC]

AWheating:

even you get 60C in the unvent that will only store 10-15% more heat then a tank @ 55C
It may change from 40min shower to 50min shower, but then it will take even longer time to heat up the whole tank.

And for instant system you mix the hot water with cold water, at least the chance of the unvert blow up are more likely then I go to hospital.

 

[DuckyUC]

Unvent the best!

 

[DuckyUC]

Why not give a suggestion of the best unvent system physically exist? much more easy to discuss the performance etc.

 

[DuckyUC]

Having difference opinion is the point of the forum and discussion, if everyone have the same opinion all post will finish in 1 reply.

Unvent the best!

 

[AWheating]

going to your level reasoning for a min, does the third person stand outside the bathroom for 40mins, seems like a waste of time to me.

maybe some diversity to your military routine is needed.

 

[Killy Bing]

Unvented isnt always the best....but for your limitations its your only real option

anything you attempt from this point on will be unsafe as you don't understand the limitaions of what our trying to use.

as such im having no part of it.

install an electric shower thats the safest option......for everyone.

 

[DuckyUC]

AWheating:

With an unvent system the 3rd person need to wait 3hours.

 

[DuckyUC]

1king55:

The instant water heater is a electric shower really.

 

[Killy Bing]

Have you not realised that water heater you got reduces the flow to get its temp rise..... Boosting it before will either have no effect or bust it.
boost it after and the pump and water heater will run dry.

electric shower is at the point of use and designed for use for a shower.

you've probably got a sink heater...

 

[johnnyplumb]

Our Father, Who art in heaven
Hallowed be Thy Name; thy kingdom come ...... lol

 

[DuckyUC]

I know the heater restricted the flow to heat the water to designated temp
Place the pump in cold inlet will have no effect

So I try to get the pump install in the hot outlet
get a tune-able pump, Set the pump at lower power to avoid the heating element run dry

It wasnt those high power main boost pump, it is similar to those pump build in storage cylinder which boost the pressure.

 

[DuckyUC]

it is 12kw and are design for shower, def not sink heater,which normally is 3kw.

 

[AWheating]

albion ultersteel direct unvented cylinders, page 6

http://www.albionwaterheaters.com/pdfs/sales/ultrasteel.pdf

120 L cylinder has a recover time of 45 mins with 2x3kw heater
150 L cylinder has a recovery time of 61 mins with 2x3kw heaters

these will be simular figures of other cylinders

also remember the cylinder will start to recover during the first shower not after the second.

so admit your wrong and stop talking rubbish.

 

[stoker122]

38 degrees generally for a shower (can't believe I got sucked in!)

 

[DuckyUC]

2 shower running at the same time, heating recover from 1st shower already involved in the calculation.

120L/5 will last 24min recharge 45min
210L/5 will last 42min recharge 96min

Thanks for giving the information to support what I said before.

 

[DuckyUC]

normal shower about 38c-42c

 

[DuckyUC]

2 standard bath need 210L for direct unit according to the product info you provide.
Which take 96min to reheat, with 5L/min last about 42min.

So far it seem the instant set up still better, wait for 2*20min shower only take 40min.

 

[AWheating]

2 shower running at the same time, heating recover from 1st shower already involved in the calculation.

120L/5 will last 24min recharge 45min
210L/5 will last 42min recharge 96min

Thanks for giving the information to support what I said before.

2 showers at the same time with 5lpm from a electric heater?

so why did you say 3 hours in another post, your an idiot.

please dont kill anybody but yourself, terra a bit. :banghead:

 

[DuckyUC]

3hours for the 3rd person to wait, can you read before comment?

 

[stoker122]

No normal shower 38 as that is the safety point, if you want it hotter you would need to press a safety switch to unlock to stop people getting burned.
What are you showering, lobsters?

 

[DuckyUC]

It seem the indirect one are awesome! But 16.52kw rate need 71.8A @230V, really wonder will I able to fit it.

 

[AWheating]

3hours for the 3rd person to wait, can you read before comment?

1st person shower 20mins cylinder starts to recover, 2nd person shower cylinder still recovering, 3rd person has to wait 3 hours ???

you need this book.

 

[clarky101]

Do people really have 20 minute showers....that seems an age in which to just stand still....

 

[happyflyer]

(can't believe I got sucked in!)

I double love this one, you just could not resist, there's no fool like an old fool 94 post and this guys still at day one, its a scam, perhaps he's going to try and sell us something :42: I love spam on bread

 

[Dotty]

Oops! I must've hit the ban button......

Oh well.....

 

[happyflyer]

Do people really have 20 minute showers....that seems an age in which to just stand still....

If you are a dirty old git....:37:

 

[AWheating]

i am, but not that kind of dirty :53:

 

[happyflyer]

AW,


This is in the death throes now, let it go peacefully, have a modicum of decorum, it never did get finalized and we lost this one, there will be more no doubt

 

[nicro3]

That Ducky has to be Flexible Frank reborn.

 

[Koogatubac]

God it was getting boring... And i only commented once