OP
Geordie Spark
And THAT Chris, is why I don't waste too much of my time writing long and detailed replies on here anymore!!!
Discuss Combi boiler- How water not that hot anymore in the Central Heating Systems area at ElectriciansForums.net
And THAT Chris, is why I don't waste too much of my time writing long and detailed replies on here anymore!!!
No worries m8 no offense taken and yes you right they don't say thanks to the help they get sometimes, but that life
I got a bit lost reading the posts on this thread.
I don't know if it's been suggested or not but here goes.
Many combi's have an adjustable temperature setting for both tap water and for radiator water.
Have you tried raising the setting for the tap water temperature?
I'm quite aware that the mains temperature drops during the winter months.
It's just that before I'd suggest reducing water pressure (which is something the water board do where I live anyway), I'd suggest adjusting the temperature control, as that's usually quite simple, and won't affect a dishwasher or washing machine fill rate.
Excuse my ignorance but, I thought that when 'one' turns the temp dial up on the combi boiler it then regulates the water flow rate to get to the temperature requirement.
Surely turning the mains pressure down or the isolators to the shower is not the answer, get back who ever fitted the boiler or a registered installer to have a look.
A combi does not regulation flow rate of water through the boiler it regulates the gas valve to adjust the burner pressure hence giving more or less heat to the flow passing through the heat exchanger. The temp dial controls the temp of the return pipe to the burner after having passed through the secondary heat exchanger. I have not fully read the post but has the OP checked his hot taps to see if they are 'hot' as it could be a case that the mixer is on its way out, as it seems unlikely to be the boiler as he states it's new, older boiler do have a problem with lime scale in the secondary heat exchanger, also has the installer checked that he has the minimum burner pressure as laid out in the MF as this has a massive effect on hot water temp.
I had problems when Warmfront wanted to fit a new oil boiler they wanted to fit a combi I said no house is too big then they wanted to fit a floor mounted boiler I said no replace like with like i.e. wall mounted then they wanted to fit the 12/18 instead of the 18/25. I told Warmfront to look on bosch website they said no have the boiler fitted outside no I said. Got what I wanted in the end. If you have more than one bathroom then a combi wont heat enough hot water.
"Hello puddy",
Well done for `researching` about your Boiler / Heating & Hot Water requirements and sticking to what You wanted.
There are various Combination Boilers that are advertised by the Manufacturers to be able to suppy `High Hot Water demand` properties - for example the Ravenheat CSI 150 - a `42 KW Combi` - the published Hot Water supply specifications are:
D.H.W. FLOW RATE 30 °C rise 20.1 l/min
D.H.W. FLOW RATE 35 °C rise 17.3 l/min
D.H.W. FLOW RATE 40 °C rise 15.1 l/min
These stated Temperature rises are from a 10°C Cold Mains inlet temperature.
BUT - the Hot Water outlet pipe from the Combi is still only a 15mm Pipe - so it would still NOT be suitable to run Hot Water to TWO Hot Water outlets / Taps / Showers - especially if they were any distance [pipework] from each other.
Regards,
Chris - Heating Engineer - Registered Gas Engineer.
What size is the Gas Supply pipe for that one Chris?
I'm guessing it's probably 28mm
Have you thought of installing an Eco Flow Shower head?
They use 40% less water with a lower flow rate, but give a similar experience to higher flow rate conventional shower heads.
Waterpik Showers Videos
http://www.waterpik.com/shower-head/ecoflow.htm
The Eco Flow Shower Head might help the Original Poster to have a more acceptable Shower - well done for posting these Links about it - although I would not expect the OP to respond to your message.
.He has NOT even bothered to respond to Us - I am guessing that He either does not agree with what we have stated or just cannot be bothered to respond as the Answers are `Not to His Liking`[?]
There is a New product specifically designed to help with this `Hot Water from a Combi not as Hot in Winter` problem - `COMBISAVE` - `IMPROVE BOILER PERFORMANCE IN WINTER`
www.combisave.com
Something that occurs to Me immediately about this product is that Combination Boiler Manufacturers would probably be VERY unlikely to Approve the fitting of this `Thermostatic Control` to the Hot Water Outlet Pipework of their Combi`s.
Although it may be a `Water Supplier Approved device` - regarding the statement that it will `Save Water` - I cannot imagine that a Combi Manufacturer would approve ANY device that would Reduce / `Delay` the Hot Water Flow through the Boiler Heat Exchanger.
Because the device could malfunction I would not class it as the same as a Thermostatic Valve / Thermostatic Shower Valve - OR the same as reducing the Hot Water Flow rate through the Combi using a Tap / Shower Valve Control.
I have seen the British Gas and NPower Logo`s on the website as Installers of this product so there must either be some Manufacturer`s approvals or these Utility Companies must have decided that there is NO Issue regarding fitting these devices to Combination Boilers [?] - but I do not know about that.
Installing one of these on the Hot Water Outlet pipework from your Combination Boiler without getting approval from the Manufacturer [probably very unlikely] MAY cause the Appliance to become either `Faulty` - or possibly even Dangerous.
Could You please help Me to understand something that you wrote about a Quote from one of My posts
Originally Posted by chris murphy:
Something that occurs to Me immediately about this product is that Combination Boiler Manufacturers would probably be VERY unlikely to Approve the fitting of this `Thermostatic Control` to the Hot Water Outlet Pipework of their Combi`s.
Although it may be a `Water Supplier Approved device` - regarding the statement that it will `Save Water` - I cannot imagine that a Combi Manufacturer would approve ANY device that would Reduce / `Delay` the Hot Water Flow through the Boiler Heat Exchanger.
Because the device could malfunction I would not class it as the same as a Thermostatic Valve / Thermostatic Shower Valve - OR the same as reducing the Hot Water Flow rate through the Combi using a Tap / Shower Valve Control.
I have seen the British Gas and NPower Logo`s on the website as Installers of this product so there must either be some Manufacturer`s approvals or these Utility Companies must have decided that there is NO Issue regarding fitting these devices to Combination Boilers [?] - but I do not know about that.
Installing one of these on the Hot Water Outlet pipework from your Combination Boiler without getting approval from the Manufacturer [probably very unlikely] MAY cause the Appliance to become either `Faulty` - or possibly even Dangerous.
End of Quote
Your reply to that quote:
I am NOT trying to be `Funny` / Awkward here:
I was commenting on the `New` Product that I mentioned in My post - the `Combisave` - I cannot see what You meant when you used the Quote in relation to your reply to it - ?
Could You please post a reply to explain what You meant - "Thanks".
All its about was energy saving devices and why I was told not to fit them with a Boilermate 2000
Site Forman said don’t fit if you have a boilermate 2000 it’s all done on flow and return temps when calling for heat or water its onboard chip gets confused I am sure you have come across them at some time? I like them but don't know how you guys feel when you find them in a property
End of your reply
When I moved to my present home we found that there was no hot water tank and it had been replaced with a device called a Boilermate 2000. When you move to a new housing development you tend to be given freebee’s. The enclosed box had 4 low energy bulbs and includes devices to screw on or attached disk to your taps that meant you would save water if you fitted them
But
The site foreman told is not to fit them
This has nothing to do at all about the Combisave product if you had worked on a Boilermate 2000 you would understand why the devices I was given free should not be fitted.
It seems when computer chips take over any devices not approved by a boilermaker you could knock out fine tolerances that could cause problems. It’s a bit like getting your car engine ECU chipped. Have you worked with a Boilermate 2000?
I am not sure if your building insurance would pay out if you fitted things to your boiler without speaking to the manufacture first. Insurance companies use every trick in the book not to pay out
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