Variable flow Water Pump for instant water heater?

[DuckyUC]

Hi again

I fitted a instant electric water heater to supply hot water for whole flat
but the hot water flow are quite low

So I am finding a pump that can:

1. pump only on when water flow
so no pump noise all the time and the pump have longer live

2. pump can tune how much water flow/pressure to increase
the water heater have a max 10bar Rated pressure
If the water flow too high the water heater wont able to heat up the water to require temperature

I find a pump call Salamander home boost on google
It only on when water flow but it design to maintain 12L/min all the time so I do worry that will give too high water flow and the water heater wont able to heat up the water to require temperature.

Any recommend for water pumps?

 

[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