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Flow direction for Central Heating Pump


 
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Mikey999

from United Kingdom

Joined: 15 Nov 2008
Posts: 7
Location: London,
United Kingdom

PostPosted: Wed Oct 06, 2010 9:28 pm Reply with quote

Hi,
I've a new home and had trouble with a resonating noise from the pump (as it's installed on a studded wall in the airing cupboard) My problem isn't necessarily about the vibrations but more your opinions on one of the suggested solutions, having already tried several other attempts to reduce the vibrations.

The builders have had a meeting about this and the decision is to try turning the pump around and thus reversing the flow.

The system uses an unvented cylinder (Tribune HE) with an expansion tank and the boiler is a Glow Worm Ultracom 18hxi.

I'm just concerned that the system is designed to flow one way with regard to the flow of water through the cylinder, the temperature the pump may get if it's receiving the water from the boiler rater than feeding it the cooler water. Also does it matter to any temperature sensors in the boiler ?

Would really appreciate any advice and if the proposed solution is something worth a try - is it a known way to reduce vibrations ?

Thanks !
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Boilerman2

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Joined: 10 Jun 2009
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Location: Suffolk,
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PostPosted: Wed Oct 06, 2010 9:32 pm Reply with quote

This is a crazy idea which will not cure the noise and will definately F**k things up DO NOT LET ANYONE turn the pump round!! the problem is with the mounting of the pump on the stud wall icon_wink.gif
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Mikey999 (6 Oct 2010)
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Mikey999

from United Kingdom

Joined: 15 Nov 2008
Posts: 7
Location: London,
United Kingdom

PostPosted: Wed Oct 06, 2010 9:45 pm Reply with quote

Thanks for the quick reply, I've also since checked the radiator valves, whilst most are Myson TRV '2 way', the bathroom one is Drayton TRV 4. Online, some info says it (or some version of it) has 'Reverse Flow', mine has a flow arrow on the side of the valve so does this suggest it's one-way?

Anyway I do value your advice and will tell them to come up with a better solution. I've temporarily unclipped the pipe brackets and packed some foam insulation in between that and the wall and it makes a massive improvement so will suggest they get some form of rubber buffers/brackets if they're something which can be obtained?
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45yearsagasman

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PostPosted: Wed Oct 06, 2010 9:59 pm Reply with quote

This is a bl**dy wind up surely.What moron would suggest reversing a pump to cure a noise problem.
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Mikey999 (6 Oct 2010)
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Mikey999

from United Kingdom

Joined: 15 Nov 2008
Posts: 7
Location: London,
United Kingdom

PostPosted: Wed Oct 06, 2010 10:39 pm Reply with quote

nope - not a wind up, and I think a few people have deliberated over this as a solution. I'll pass on your feelings when they arrive tomorrow !

BTW, so i can give them reasons...what are the sort of things that can go wrong when doing this?
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Nige F

from United Kingdom

Joined: 28 Jun 2005
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PostPosted: Thu Oct 07, 2010 12:08 pm Reply with quote

A few people icon_rolleyes.gif and not one proper plumber among them .
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Mikey999

from United Kingdom

Joined: 15 Nov 2008
Posts: 7
Location: London,
United Kingdom

PostPosted: Thu Oct 07, 2010 9:53 pm Reply with quote

Nige F wrote:
A few people icon_rolleyes.gif and not one proper plumber among them .

Clearly not, I called Glow Worm Tech, they too said absolutely do not let them reverse the flow - I called the builders so they are now going to look into a better solution (hopefully) - perhaps it was just a consideration but glad it wasn't followed through ! - thanks ALL !.

I was thinking some form of rubber buffered brackets on the pipework to reduce vibrations (replacing the plastic ones) - are these something which can be bought and if so are they easy to install on existing pipework?
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pmx_super

from United Kingdom

Joined: 27 Oct 2003
Posts: 209
Location: United Kingdom

PostPosted: Fri Oct 08, 2010 10:19 am Reply with quote

Why is the pump mounted on the wall at all? Aren't CH pumps usually fully supported by the pipework they're mounted in.
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45yearsagasman

from United Kingdom

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PostPosted: Fri Oct 08, 2010 4:39 pm Reply with quote

PS We would love to hear the outcome to this.Please post back Mikey999
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Mikey999

from United Kingdom

Joined: 15 Nov 2008
Posts: 7
Location: London,
United Kingdom

PostPosted: Mon Oct 18, 2010 10:17 pm Reply with quote

OK, had a couple of the plumbers back in today - they didn't seem to know what had been discussed etc, but one of them came clearly knew reversing the pump wasn't an option.

One had been instructed to move the pump to the utility room below, the other instead instructed not to. Anyway, they ended up removing all the clips from the pipework near the pump and made more clearance where the pipe goes through the floor (to the boiler in the utility room directly below) They also put insulation round the pipe to ensure it wasn't in direct contact with the wooden flooring. It now seems to run a lot quieter with less vibrations, though I'll have more of an idea in the dead of the night - when it kicks in at 6.30am !
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Nige F

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PostPosted: Tue Oct 19, 2010 8:21 am Reply with quote

Mikey999 wrote:
[I was thinking some form of rubber buffered brackets on the pipework to reduce vibrations (replacing the plastic ones) - are these something which can be bought and if so are they easy to install on existing pipework?
YES they can be got from Plumber`s merchants icon_idea.gif . Don`t you just love sitework plumbers icon_wink.gif
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