Grundfos Pump. How To Vent an Alpha Pump.

[@1joelsmus]

I took the head off the one I was struggling with....it didn't have a slot to bleed from, blank head.

[@HeatingGeek]

I know I found out the same way. :-(

[@bennyc07i]

For anyone wondering how to remove the head, use a wide flat screwdriver. Insert it shallow and twist slowly to pry it away. Work your way around until it is loose enough to pop up. There is a metal locator pin bottom right. If you find it too stiff to push back on or at an awkward angle (make sure the contact pins are aligned first of all). Use some silicone spray around the rubber seal and also the plastic legs/teeth, be careful not to get any on the innards or PCB of the pump head, this should help it slip back on.

[@ThePigeonlips]

I'm really enjoying your videos you have raised the bar with your knowledge .thanks for taking the time for making and sharing them.your a top engineer

[@HeatingGeek]

Thanks. I really do appreciate it. Things are quite difficult at the moment and I haven't got much time (or money) to make decent videos. Hopefully soon I will have more time.

[@jaxmar88]

I have found that when undoing brass pump valve unions, the tighter you squeeze your grips the union becomes impossible to undo because it becomes slightly oval in shape, using your grips backwards tends to prevents this and can often make the union much easier to undo, not saying it will work every time but has done for me on many occasions.

[@heatservicebwcuk1545]

Failing that chisel and hammer lol

[@HeatingGeek]

jaxmar88. I noticed this too. If you squeeze like mad it docent undo. Larger grips mean a better fit so less squeeze. You said something I thought for years!!

[@HeatingGeek]

Yep

[@k20aa]

Can believe thats hidden behind there . Fitted loads of them Good find you geek LOL

[@HeatingGeek]

I KNOW. Couldn't believe it!!

[@fionnan2811happy]

Good man. You just saved me a new pump as I was trying to figure out how to spin the shaft when they are stuck after not been used for a long time. Yea they are a pain in the sack🤯👍

[@HeatingGeek]

Glad I helped. :-)

[@dimiretail1546]

Live and learn! My life just got a little easier. Noted, many thanks.

[@Cuddleleader1]

Morning sorry to open up an old thread. I'm going to try this. Do i need to turn off the electric to the pump before I remove it. I expect have to make sure doesn't leak if that electric circuit goes on top. Sorry I'm a newbie to this

[@GonnerGeezer]

Brilliant Thanks mate l, is never have guessed that just pulls off 👍🏾

[@HeatingGeek]

No problem 👍 The vent is missing from them now. :-(

[@dougieluffs]

I had to use a cordless grinder to get a pump off yesterday. Stilsons & blowlamp couldn't budge the pump nuts!

[@HeatingGeek]

I cut the nuts (big) with a hacksaw and split them with a screwdriver. My customers wouldn't let me use a grinder. Must of stunk the house out!!!!

[@heatservicebwcuk1545]

Lol why not just remove the complete valves ! Sounds a faff !

[@dougieluffs]

Didn't have enuf play in the valves to take it all out, had to to change valves anyway cos they were both passing.

[@HeatingGeek]

bwc uk. Just cut the nuts and replace them with new so you don't have to drain down.

[@LynGriffiths70]

Many thanks 👍

[@HeatingGeek]

Sorry I didn’t respond to this comment. I didn’t see it in my feed. :-(

[@abooli2]

Show how you took the head off i tjink that's the tricky bit

[@idontleavelikesileavecomme655]

I'm having the same problem

[@yensabi]

We'll knock me down with a feather pillow , I did not know you could split them like that......! nice one mr geek.....👍

[@HeatingGeek]

Neither did I until it came off in my hand!!! Then I was like WTF.

[@millomweb]

Do you have to bleed them ? I've installed my pump so it self-primes.

[@HeatingGeek]

Thats fine.

[@WLMjolnir]

Thank you

[@HeatingGeek]

Its not on the new version. :-(

[@tonyspeight6369]

Mine seems to be stuck tight and i can't remove the front cover...any tips pkease

[@tethadam6678]

Great

[@allanstrand638]

Danfoss alpha2 pumps for bleeding =automatic run it on III for a couple of min= automatic bleeded...

[@HeatingGeek]

Sorry I didn’t respond to this comment. I didn’t see it in my feed. :-(

[@gason6175]

Nice one HG excellent find I have had nothing but grief with those poxy pumps and they arent cheap . How easy do they come apart ?

[@HeatingGeek]

I held it to undo and it came off in my hand. I put it back on after and had no issues. I will get hold of one and do another video to see what we can do with it.

[@nickdonoghue]

@@HeatingGeek did you ever do a video showing how to take the electrical face off? My pump is making a humming noise after having the system power flushed, I presume it’s because there is air in it.

[@Shandybrother]

these have automatic venting according to data sheet.

[@HeatingGeek]

At high level with no other means thats bullshit. It will never vent with 0 water in it. I think they mean it will push out a small airlock. I have turned them around and all sorts to get circulation. In the end I put a old pump in (working) and left the bleed screw open with a bucket under it and just waited. 10min later job done.

[@Shandybrother]

yes, I agree at high level the install there should of had a bleed pipe installed higer than the pump

[@millomweb]

@@HeatingGeek Careful planning how you mount the pump. Directly above mine is the water feed and the air vent. So it's self-priming.

[@bg563195]

New ones have a blanking cap now so you can't bleed them at all

[@HeatingGeek]

I have written that in the description. I cant believe they changed it!!

[@mrsayef1059]

HG, where is the tools review video.. i was about to compare ypur tools with mine and order what i dont have

[@HeatingGeek]

I had to remove it for a while as Amazon rejected me (but still let the links work). I have reapplied and added new links. I also found some links I couldn't before so theres more there now. I have new injector cleaners coming and will video them and put them up ASAP. Video 3 soon also.

[@mrsayef1059]

@@HeatingGeek thanks buddy looking forward to it, i need to prep a new go to tool bag for the winter break down ... i operate my business with my car so your video is so valuable 👍🏼👍🏼

[@HeatingGeek]

Ok good luck. I would rather have two small bags than one big one. :-)

[@idontleavelikesileavecomme655]

Bro I like the vid but how do you get the head off?

[@HeatingGeek]

I just grab it and pull. You can probably use a wide plat blade screwdriver to help you.

[@idontleavelikesileavecomme655]

@@HeatingGeek thank you

[@engjds]

Why do you need to bleed it?

[@HeatingGeek]

you don't always. But anyone fitting them regularly will know.

[@engjds]

@@HeatingGeek They sound different?

[@HeatingGeek]

They are just a pain if you need to get the air out but cant.

[@dimitarvasilev6804]

I just wonder how did ya pull this head off ? I was trying 3 days and at the end i called plumber. He came at home he saw i was trying to do something with pump head and he asked me what i was trying to do ? i have explained to him and he said most probably you was watching some funny guy who dismounted the whole pump and there after you dont know how did he take off the head! Seriously mate if you going to state " I just pulled off the head " not bad idea to show how you've done it eventually . After i spoke with the plumber at home and showed him your video he was actually right. The whole pump is disconnected ... He just mention until somebody dont show you how he done it better dont try your self because most probably the person in the video is not showing how he done it with reason ? Anyway useful information but not full

[@HeatingGeek]

You can clearly see in the video the pump is in place and still on the heating system. I did just PULL it off. I have done this on several pumps to check and some are a lot harder than others. I'm sorry you couldn't do it but this isn't staged. I was replacing this pump anyway and it came off in my hand when I went to undo the nuts. I have also mentioned in another video that later pumps just have a blanking plug instead of a vent now. Anyway, I'm glad you got your issue resolved and you used a plumber. Watch the first 10 seconds of the video again to see the pump is clearly still attached to the system. NO BS here.

[@Rimdana]

Mine was fitted years ago and I'm pretty this would work for me if I could get the electrics off. Maybe bigger hands. I'm tempted to pry it off with a screwdriver, but reckon I'll damage the head, me being me. Why do these things conk out when its snowing 😭

[@Rimdana]

Omg, yessss!!! I got it off!! All thanks to your feedback to comments 😁 i used a narrow wallpaper stripper with a bevelled edge to pry it off. My screwdriver couldn't get it started. I'll leave another comment in a few. I was right about the age. The screw is here.

[@Rimdana]

Right, so I took the screw off (the washer was fine), turned the impeller back and forth and popped the screw back in. Had a wad of Plenty under the screw to catch any water trickle, as mine's mounted upside down and I didn't want to wet the connectors. It was hard to get back on, but carefully, between my bodyweight and a rubber mallet we got there eventually - I didn't hit it very hard. Now it sounds like it's moving, it's very quiet anyway so its hard to tell. I'll let you know if the rads downstairs finally heat up.

[@melvinevans9981]

Touch !

[@HeatingGeek]

It isn't on the new ones!!! My mate just sent me a photo!!

[@melaniewirthoff7422]

How do you unscrew the electronic part(black bit) from the red part?

[@HaggleLad]

It's not screwed in, it's just a tight sealed fit. I was able to use a flat head screw driver to prise it off the pump.

[@MrEngineering12]

Hi there, can you check my channel, I have a video of a similar pump Grundfos Alpha 2 L. It hasn't been working for a month or so, when I started the heating yesterday it started to make clickng noises. No errors displayed, but doesn't work as well. Thanks

[@HeatingGeek]

Sounds like the pump is seized and trying to start. you may be able to free it off once the head is off. Unfortunately this requires isolation from the heating system and removal of the pump head, then you can try and free off.

[@MrEngineering12]

@@HeatingGeek Thanks!

[@leaturk11]

just look at all that electronic crap to go wrong...lol

[@HeatingGeek]

Isn't that the truth.

[@tomstrutton4351]

Grunfoss have got another new one coming out

[@HeatingGeek]

Can we vent it?

[@tomstrutton4351]

HeatingGeek no, rep was in my local branch and said they're self venting.....still loads of set ups out there where you need to vent them manually so that's a grunfoss out if you need to replace

[@millomweb]

@@tomstrutton4351 What a good job I've 2 spare Grundfos pumps in the garage !

[@millomweb]

They are pumps 2 and 3. 1 burnt itself out one morning when it failed to start. Speed control was via a valve rather than switch. 2 replaced 1. We ran that on speed 1 - it wasn't powerful enough to burn itself out ! 3 replaced 2 - which was flushed out - then worked fine again, so kept as a back up. 3 never failed, was taken out because a new crap pump was installed under 'warm front' grant - so 3 went straight into storage. The crap pump is still providing a satisfactory service on speed 2.