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Discuss Numerous pump,heating questions in the Central Heating Forum area at PlumbersForums.net

nick83

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IMG_1183.JPG IMG_1184.JPG IMG_1185 (1).JPG Hope someone can advise me.My new pump is situated pumping downwards as per picture.On initial startup there is a lot of turbulence/air noise and about a .2bar pressure drop.Would I be better having it fitted to flow on opposite wall,pumping up? or is the pump too powerful--ups2 25-80.
Also would there be any benefit in extending AAV higher up I have at least 2 feet above it?I am going to replace the pump valves because I think they maybe full of magnetite
thanks everyone
 

Craig Watson

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Are you sure that's pumping the right way? Which way is the moulded arrow on the side of the pump body pointing?

Also how big is your heating system?
 

Riley

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That looks to me like it’s pumping up too
 

Riley

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Plus that’s a light commercial pump I believe
 

Craig Watson

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The pump head may have been turned round but still worth checking, and yeah it's a light commercial pump designed for 30-50kw systems.
 
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nick83

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the arrow is pointing down,and is light commercial on fixed speed2.It is 4 bed house,24 rads--some are small,and a 37k oil boiler
 

Riley

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So the pump head has been rotated? When you fitted it was air bled out of the pump??
 
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nick83

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So the pump head has been rotated? When you fitted it was air bled out of the pump??
i rotated it,and undid central screw until water appeared? is that right?
basically,i had a 25-55 for 14yrs but this was the supposed replacement 180 for it
 
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nick83

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i rotated it,and undid central screw until water appeared? is that right?
basically,i had a 25-55 for 14yrs but this was the supposed replacement 180 for it
worst senario is replace pump.Could get a 130 size and fit adapters
 
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nick83

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speed 1 doesn't seem to make any difference to turbulence/air.
have not tried pp settings
 

John.g

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speed 1 doesn't seem to make any difference to turbulence/air.
have not tried pp settings
That's a giant of a pump, a 8M head, 140 watt pump and its still a 6M pump on speed 1. It will still pump at that 6M head (constant pressure, even when on a fixed speed setting) between 0 & 2.3 M3/hr (38 LPM). Just change it over to PP1 setting and you will be in business I would think. (you can always go to PP2 or PP3 if PP1 not satisfactory). The attachment will show how to go to PP mode, very simple, just a > 5 sec press of the button and then select your PP setting(s)
I'm not sure what you mean about changing the pump head around, if you want to change the pump direction you have to change the the pump body around, not just the pump head.
 

John.g

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Here is the attachment.

For example of PP1 setting, if your required flow rate is 20 LPM @ 3M head then on fixed speed 1 you will get 28 LPM @ a 6M head but on PP1 you will get that 20 LPM @ a 3M head, no noise and a huge saving in pump power.
 

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nick83

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Here is the attachment.

For example of PP1 setting, if your required flow rate is 20 LPM @ 3M head then on fixed speed 1 you will get 28 LPM @ a 6M head but on PP1 you will get that 20 LPM @ a 3M head, no noise and a huge saving in pump power.
thanks alot for that info.Iwas confused about pp.
i meant move pump completely over to far side of cupboard and having it pumping up on flow as opposed to down return,and obviously then i would rotate so pump casting arrow was facing up
 

John.g

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thanks alot for that info.Iwas confused about pp.
i meant move pump completely over to far side of cupboard and having it pumping up on flow as opposed to down return,and obviously then i would rotate so pump casting arrow was facing up
My own system is pumping downwards, I don't think you will have to make any changes other than the above settings.
Let us know how you get on, Thanks.
 

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