What is the best speed to set the central heating pump ?
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- Опубликовано: 18 дек 2019
- Getting the pump speed wrong can cost you in higher energy bills. Get it right and make your heating system as energy efficient as you can.
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Many thanks Al. 
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Happy anniversary both-here’s to many more informative videos in 2020!!!!
Thanks Al and Jan. Have a happy new year.
Happy Wedding Anniversary Al, I started watching your videos years ago when you reviewed the GTech hoover, which I bought and still going strong. Always enjoy your videos, thank you and Happy Christmas.
Thank you penguinred651 have a lovely Christmas too. Al and Jan.
O and thanks for watching for such a long time.
Happy Wedding Anniversary Al and Jan.....thanks Al for all of your very expert advice you have gifted to us this year,oh, and btw.....Happy Christmas and all the best for 2020 to the both of you,I hope you have a good one,you both deserve it.
Thanks a lot lostboy. Have a good Christmas too.
You are such a friendly, kind, and jovial fellow. I really enjoyed your video good sir. Thank you for the informative, credible expertise! The logic in this video was completely cohesive and transparent, all scientific logic; easy to follow. I have not only FOUR zone pumps on my system but ALSO an internal built-in modulating circulator on my Rinnai Condensing unit which controls the primary heating loop (175,000 beautiful BTUs!). Yes, she is a beautiful beast indeed. Cheers to you sir and have a brew for me. You evidently are a master of HVAC and plumbing. :)
Thanks a lit Nick.
Happy anniversary, fantastic to see you getting your priorities right and making a video on your anniversary, lol
Hey I know how to treat a girl right. Ha ha.
dereton33 😂😂😂
Thanks Al, happy anniversary and keep on sharing that excellent knowledge! 👍
Thanks a lot will do.
Thank you. Have a nice Christmas
Very many congratulations on your 45th wedding anniversary and you also sharing with us your experience. Hope you have a lovely anniversary. Treat Jan to a new pump :-)
Hey what a good idea. Maybe a surprise Christmas present. Ha ha.
Good comments all round, don't forget the lock shield valve at the other end of the radiator. Meant to adjust the flow through the radiator, mostly forgotten by all. Pump technology is advancing in the commercial world, and eventually the humble domestic circulator, they are not really pumps as such benefit. SIMPLY THE NEWER PUMPS regulate themselves according to the system resistance. This is a good series of advice and learning for all, keep it up.
Thanks Bruce.
A very happy anniversary to you & Jan! Enjoy Christmas & see you in rude health in 2020!
Thanks 711honved you have a good Christmas too.
Thanks for the useful information, happy anniversary to you both and have a merry Christmas and a happy New year.
Thanks Andy same to you have a good one
Thank you. Happy Christmas & anniversary!
Thanks John, have a good Christmas too.
Great to hear about your wedding anniversary, many congratulations!
Thank you.
very generous of you to help folks like this. Heres my riddle. Got an entire new boiler, pump, electrics, motorises valves and system flush for a two zone system. Plumber forgot to tighten down the pump and it leaked water for several days and I only discovered this as the noise was significant. He returned, tightened the pump down and the heavy noise dropped significantly but we’re left with a persistent high pitched whine that can be heard throughout the house. Im sure he will address this issue but I’d be grateful for your thoughts on what might be causing the whineing.
Usually air in the system.
pump speed was too high, whisper quiet now
Happy anniversary Al and Merry Christmas. My ex plumber fitted a new pump for me and set it to max causing cavitation. I had daily half rad full of air in the bathroom and the noise in pipes was so bad had to turn the volume of tv very high. He was blaming my ancient systemThe pump had an intelligent auto setting. 3 years and now issues.
Thank you. Have a happy Christmas too.
Happy Christmas to you all, I love your videos so helpful, I just been looking at our pump and it got and auto adapt settings seems to be working ok on that that will save some electric it's been running very loud and using lots of electric running flat out. Thanks
Have a good Christmas Shane.
All the best to you Al for your useful videos. I don't mind a pint of Tribute myself.
Yes a great pint. Ha ha.
Congratulations on your anniversary!!!
Thank you
happy anniversary al and happy x chrismas.
Thanks Ratch. You have a good Christmas too.
Really like this instruction Sir. The logic is brilliant. Thank you.
Glad it was helpful!
Happy anniversary to you both
Thanks Sam.
Nice one Al, and merry christmas to you 👍
Thanks and you too.
happy christmas to u too love the beer thing on the wall :) 10/10
My favourite thing too Mike. Have a good Christmas too.
@@dereton33 lol cool you too :)
THank you AL, your knowledge and clear explanations calm me down when dealing with and starting to panick with central heating issues.
would you recommend a system flush before fitting a new pump?
Yes as it is a system drain down to do it. You may as well.
Great video. Valuable tips about the pump.
Thanks 👍
Happy anniversary! Thank you very much for making this video - I'm the chap who asked the question. It seems that setting 1 works OK on our system (3 bed house, but nearly half the rads are turned off). Quick question: the pump has recently got very noisy (a rattling sound), which gets better (or goes away) when the rad circuit opens up. It's an old F&E system (probably quite dirty). Is the pump on the way out?
Hi Laytekk thanks for suggesting this for a video.and your good wishes. The pump is certainly on it's way out. Think about another soon.
@@dereton33 Thanks, will do. Happy Christmas.
Sound! You are a legend! Wish i knew that much earlier! 😉
Happy to help!
Great video, thanks for the tips.
No problem!
Brilliiant vids! Very informative
Glad you enjoyed it
11. Rock on Darren 😲
Thanks Ben.
Great videos and gentle quality knowledge
How do you work out which central heating pump is best for your system and if a pump is on most of the time as in my elderly parents home, how long before it is worn out and are the signs of wear only by lack of heat in the system or is it always audible at the pump
Happy New Year
Pump starts to sound noisy and rads start to fail to heat up. A grunfos is always the best pump no matter which model.
Hi Al thanks for sharing your knowledge and experience it's super helpful ! If i drain down and fit Aladdin HV30C auto bleed vents to the rads will it bleed air from the rads following a drain down or would it be better to keep the manual vents as well to do the major air purging first please ?
I prefer to keep the manual air vents as well, much better for draining down and refilling, the Aladdin's take too long. Also they do not let air in.
Well Done, thanks for the Videos
No problem
Great video. Thanks !
You are welcome!
Great vid Al but a bit jerky in places?
Happy anniversary and Christmas to you both xx
Thanks all the best have a happy new year
I got this pump so interesting to watch
Thanks, I try to make the videos easy and interesting if I can.
Belated happy anniv .. yur a star .. missus seems alrright too. Cheers. G
Thanks Gary.
Thank you for the tips! I'm going to try that test out later 😀
Good luck!!
Another great video... I got a new evosta pump.. With lights... It starts up pumps then seems to stop... Any idea what's going on lol
No not with that model.
Hi Al, what about auto setting 🤔 . I have a back boiler and a stove. Also central heating. Central heating is off and The fire in the stove has died well down but the pump was set up at 3 and going crazy for hours. I don't think it's right. I do have alot of rads and 3 stories to heat but I had rads off in the middle floor and down a bit on top floor. Anyway I set the pump to auto and it stopped spinning and went from 45 down to about 13. But I'm not sure what I'm at either. Any advice please 🙂
Auto will be fine, but if you want to be in the middle ground set it to 2.
I have a Grundfos circulating pump too so I watched this keenly. Doesn't it depend on the model (and power) of the particular model?
I have the 15-50 in a 3 bed house and Brit Gas have set it to 3.
Seems a bit high, give it a try on 2 you can always set it back if it dosent heat up as before. If it all works ok then you are saving on your electric bill. Have a nice Christmas, from Al and Jan.
Heya, I don’t know anything about heating but we have an old Riello 40 oil burner. It’s now connected to a new Titan 2 circulating pump. The airlock was seemingly fixed but the rads are only lukewarm. The pipes around the house aren’t even getting hot. Have you any ideas with how you can help us please?
Try balancing out the system. I have a video on how to do this.
Hi Al,
Another top video thanks again.
Can you set the speed while the central heating is on.
Thanks Mustafa
Yes that is ok.
Good guide
Thanks!
Hi is there such a thing as having 2 pumps on a big house? Two of my rads don't heat up properly or take ages to fully heat up.
Not normally. Just balance the system better and those rads will heat up.
Happy anniversary.
"Me and the missus have been married 25 years. You only get seven for manslaughter!"
(Les Dawson)
Ha ha I knew that one was coming
Have a good Christmas and happy new year loafer.
Great vid as usual al. I try and work out velocity of 1m/s around system. The new modulating pumps, I put to constant pressure and work out available head etc. Can take a while but as you say it’s important. Too much speed = noisy , too little = not effective
Thanks Paul.
Many congratulations to both of you. Here's to the next 45 lol
Ha ha thanks Cliff.
Him: Leave it for another 20 minutes and may be have another cup or tea Or have a pint.
Me: hold my tools 😅😂🤣
Very good.
i have a bosch hrc 30 is it ok if i turn the pump to max? cause it takes a while for the shower to warm up i am not sure if it is a condensing combi boiler so what are your thoughts?
It will not make any difference. Not on a combi.
Hi, do you mean both valves on each radiator? As in including lock shield? My pump is on 3, with 8 rads, just seems overkil for a 3 bed house imo
Also when hot water tank comes on, the radiators cool, is that normal? Thanks
Yes both valves, it is normal for the rads to cool only slightly, when the hot tank comes on.
Is it safe to swrich pump from 3 to 2? For example one pump i have setting two bet second pump setting 3 ? It cant damage something in system if i switch to lower?
No it will be fine.
Jan should get a medal
LOL
Ha ha I keep telling her that.
Hi there, I've got a slight problem these last few months, when the heating is on, someone in the shower, when they've turn off the hot water, few of the downstairs rads crackle, it's been doing this the last few months, I've turned down the pump speed to medium, which slightly takes the noise away, what causes the crackling sound in the rads. Thanks. Feedback welcome.
Sludge build up in rads.
Ok me old mate thanks for the advice 👍
Thank you.
You're welcome!
Hi,
Thanks for the video. I have recently had 3 rads changed in my house but one rad keeps needing bleeding and it’s a lot of air… I have the gravity fed system.. I’ve had a plumber out and he put on auto bleed valves in the rad yesterday but this morning the radiator feels cold at the top and warm at the bottom again so suggests to me it’s still got air in it. I’m struggling now as to what to do so any suggesting from you would be great.
Thank you.
Ps
Whenever I turn the heating on it sounds like the water is whooshing around in the rads like there’s not enough water in them.
Rad speed is too high set it a speed lower. Also your plumber may have left air in the system by the sounds of it.
@@dereton33 how do I do that mate? I’m clueless when it comes to plumbing?
@@dereton33 if you mean the pump it’s at 1 already.
Do you turn heat off before changing speed on a pump or can switch to different speed while pump running ? Thanks.
You can do it while running.
You have experience with oil burners buderus g115 with alpha 2 pump?
No sorry.
Happy anniversary
Thank you very much Tony.
Does this circ pump affect the water for shower and sink as well? I've had to keep my water heater (Boiler Mate 41 gal indirect gas connected to hydronic Burnham burner) at like 140° plus to keep my husband from bitching that the shower doesn't warm up quickly enough. I want to knock that down and keep it at 120° in hopes of it lasting longer. I've had my Grundfos UPS 15-58 FRC on low (attempts at lowering crazy electric bills with ancient central air conditioner and inground pool in the summer) and wondering if maybe it should be Medium or High with three zones of heating in the house? Would this solve the issue of hot water not arriving quickly enough to the shower on the second floor with everything listed above in the basement and keeping my water heater at the recommended temp of ~120°? Thanks in advance for any advice!
Yes it would work a lot quicker. Time to turn it up.
@@dereton33 Thank you so much for responding I appreciate it! The one thing I seem to keep running into, annoyingly, s that when it's running at a higher speed warm water seems to just flow into my forced water floor board heaters on the first floor zone right above the grufundos, boiler mate, and burnham...Sila was supposed fix while I was on contract twice, never did, and then try to get me to renew my maintenance plan and pay them separately for that.
Can be pump setting highest reason of system not giving much hot water to radiators ?
No.
High speed lower pressure so if the furthest rad doesnt get hot try turning the speed down a notch as the extra pressure might clear the sludge build up which should then be trapped by the magnaclean
thanks
I have a solid back boiler with only 5 radiator is lowest speed ok for the boiler
Yes no problem.
Hello, my plumber has advised me to leave the pump on 3 but the pump gets very loud. I have changed the pump speed to 2 which works fine but now the boiler is short cycling. Any advise?
You must have a noisy bearing in the pump. Might be worth looking to change it.
I have just fitted a Wilo pico 1-6 that says lowest speed is for 12 radiators. Do you count double radiators as 2? The system is 15mm to the rads except one tiny one in an extension on 10mm and it's not heating up.
No, do not count them as 2. To get that 10 mm fed rad working you will need to system balance the other rads in order to force the water through the 10 mm pipe, or turn the pump up some more.
The diameter of the circulating pipework is important. If you have a 15mm circulating pipework on 12 rads that seems restricting to me and may cause the rads at the end of the system never to get hot.
I have 15 rads in a 3 story house and put in 28mm circulating copper pipework to start with knowing I am never going to have a circulation problem. I use it with an old ideal mexico cast iron boiler which runs on a bog standard timer. I set the boiler thermostat manually and works a treat, no programmer, no fan, no pressurisation system, just a header tank, works beautiful.
hi bud, im having trouble with my central heating atm i seem to think the circulating pump has either seized or burnt out but my question is if either of those things have happened would it stop my boiler from firing up?
Yes it would, depending on what system you have. On an F and E system it would not, the boiler would fire run until it reached stat temperature then turn off.
@@dereton33 mine is an F and E system, would the fact their might be air in the boiler/system stop the boiler from firing up? if so could i bleed the system via a radiator as the draincock on the boiler has seized?
My boiler does fire up for about 30 seconds then goes off.
Also thanks for your help i have subbed to your channel great help 👍
Someone is doing some very serious smoking outside your kitchen window mate 😄
You are never alone with a Strand.
Can you have two boilers in a house with different KWs
Yes.
Hi
What pump do you recommend for a 14 rad microbore system please.
Grunfos, they are the best.
@@dereton33 which model please?
The Grunfos UPS2 25-80.
What does the dial in the middle do?
The one on the red with arrow
Mine is set to maximum?
Also does speed increase pressure?
If set to speed 3,is this running faster and increased pressure too?
The speed dial speed 2 is the best setting speed 3 like yours is costing more to run and putting more pressure on the system.
@@dereton33 what does the twist knob dial do in the middle of the pump? Is that something we can alter?
Also what is difference between the speed when setting is solid and flashing?
It looks like there are 6 options to choose from?
what bout the auto settings on the new grundfos? thanks again
Yes they are good also.
@@dereton33 reccomended over standard settings?
hi mate same question but i dont have high med low i have this what do i set??? - Target value of internal high-efficiency pump in %. Possible settings:
0 = Auto
1 = 53
2 = 60
3 = 70
4 = 85
5 = 100
at moment its on auto and i can check the speed says 15% my return temp on the lcd of the boiler says 60c but i have thermometer strapped to return which says 52c so idk if the lcd on boiler that says return 60c is accurate or my pipe thermomter?? I HAVE AN ECOTEC PRO 28
Best thing is to try setting the different speeds and seeing what results you get. See if you can get that return temperature any higher.
@@dereton33 ok thanks what the best return temperature i should aim for. also have a setting at d0 menu - Heating partial load - its on 12kw and we just had 2 new rads added with no adjustments should i leave that on 12kw OR turn it UP or set it to auto and let boiler decide?
We have one of these new or shall we say modern pumps where it suggests that it modulates the speed as it needs ,it has 3 speeds and we have approx ten rads its a evosta DAB,is my thinking correct.,congrats we were married in1976,and still going strong,
Yes that is right. Those pumps leave alone. 1976 a good year.
So what of the 3 settings is the fastest?
Number 3
I'm confused. If I open all the radiators valves and TRVs to test pump speed, surely the last rads in the system won't get hot as the first rads will have used all the heat?
Balance them all first then test pump speed.
@@dereton33 Thank you
My pump has decided not to turn off unless I drop it down to the lowest setting and the rads get hot even if only water is on; never had the problem before - the boiler/programmer/etc is about 5yrs old and it's a three bed semi.
The 3 way valve is faulty.
@@dereton33 is this expensive to rectify on a system boiler?
Does this apply to a system boiler (s plan)?
Yes.
@@dereton33 thanks for the reply. As it's an integrated pump I guess it will be a menu option. Think I need to read the manual!
Th'X Brada
What does that mean.
@@dereton33 thanks Brother👍💪
Can you help?
If I put my pump on 1 it’s dead silent but too slow and the boiler short cycles and cuts out.
2 is ok for the boiler but makes a helluva noise and vibrates the pipes.
3 is quieter but still a bit noisy and vibrates at the pump more but quieter pipes.
Any thoughts?
Also thanks for the videos, helped me out a lot 👍
2 is the best speed. If your pump is noisy then it may be time to replace it.
I’m sure my boiler has a variable speed pump as it’s only a couple of years old-I’m guessing it runs quicker when the system is first switched on by the thermostat and gradually slows down once up to temperature to keep the system ticking over??
Yes they are the best pumps for energy savings so far , Happy Christmas depechem0demusic.
dereton33 Merry Christmas Ho Ho Ho 😀😀😀
Three of my radiators are not getting hot The system is only five years old doesn’t seem to be in the air in the system should I turn off the pump I have 11 radiators
Turn off heating and bleed the radiators.
@@dereton33 thanks buddy 👍🏻
can any one tell me why i have water coming from my vent pipe in my f and e tank in the attic i have a solid fuel back boiler since the 1980
Need more specific info like if it only happens when the heating is on and have you had the system cleaned.
only when the heating is on when the pump is running .thanks@@dereton33
My pump is really hot is that normal
Yes.
Mines setting 3.in Ireland
Thats ok.
The pump is set to auto at the moment
Thats fine.
👍✅
Thanks.
i see the boiler chugging away through the window
Yes great isnt it.
Show how to do Pump ain't got a clue ? Please
I will do a video on it for you.
@@dereton33 thank you very much your videos are spot on
The return temp is 66c is to high
Yes Paul get it down to 55
How can adjust the return temperature
Can i adjust the return temperature
Just lower the temperature of the boiler stat.
My pump speed goes to 4
Set it on 3.
lol a pint for me
System overheating you have black sludge that needs cleaning out. Or if it is running in when cold, then your hot water cylinder inner coil is broken or holed.
The pump speed on the Worcester boiler is set at 4 is to high
On the high side yes.
How can I adjust the return temperature.
is your house on fire lol ?
Not that ive noticed. Ha ha
what is all the smoke blowing outside the window. maybe a BBQ?@@dereton33
Happy anniversary
Thank you.