Does position of CH pump matter?

[ln1234]

I did a quick search but couldn't find the answer to this specific question:-

We currently have our CH pump located in a bedroom airing cupboard, next to the hot water cylinder. The pump is feeding into a 3 port motorised valve for the H/W and CH. As the pump can get noisy at times (whoosing noises), I was wondering if it would work moving the pump nearer the boiler? the boiler is in the kitchen on a lower floor. This would increase the distance between the pump and motorised valve, and would be on the same part of the flow pipe.

Would this work? Would it hinder flow rates/pump performance etc?

btw, I know I should be addressing the noise issue first - i'm working on that but thought i'd weigh up other options. Have tried bleeding system and changing pump - think it might be sludge. Installing a magnaclean and powerflush might be required.

cheers!

 

[weareleeds]

If you move pump then you must also move the cold feed & expansion pipes & have no valves from expansion pipe

 

[ln1234]

The cold feed goes into the hot water cylinder from a loft cold storage tank - I can't see how the pump would be connected to that?

Also, there seems to be an expansion valve on the flow circuit after the motorised valve, which doesn't seem to be part of the pump either. As far as I can see, i'd be moving it from the top part of the flow pipe, to the bottom, closer to the boiler. thanks.

 

[weareleeds]

If you only have a cold feed to cylinder (22mm) then you may have a sealed system do you hav a small c/htg header tank in loft?

 

[gas4you]

If it is open vent sounds as if your f&e is empty or you have a blockage in the cold feed.

 

[bengasman]

most old open vent systems are full of sludge, if the system was working fine before then this should be your first check.

 

[JohnD]

whooshing noise might be air or corrosion gases.

Moving the pump and associated pipework is a lot more work than installing a magnaclean, giving the system a good clean and refilling with inhibitor (you could do that yourself and in that order without the expense of a powerflush).

It is much easier and better to clean it before you get a blockage rather than after.

 

[timmy74]

whooshing noise might be air or corrosion gases.

Moving the pump and associated pipework is a lot more work than installing a magnaclean, giving the system a good clean and refilling with inhibitor (you could do that yourself and in that order without the expense of a powerflush).

It is much easier and better to clean it before you get a blockage rather than after.

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