TWO PUMPS

desbarron · 23 Aug 2006

Large house one new section does not heat up. Masses of heat at flow but although no air in system return and rads never get hot. balancing did not help. Can I put in a second pump for this circuit wired to the CH Valve? Help.

ChrisR · 23 Aug 2006

Do you get flow in it if you shut the rest?
What's the boiler output?

weareleeds · 23 Aug 2006

Is return blocked (very likely on old system) take off a small rad & empty it if water is black system may be sludging up

desbarron · 27 Aug 2006

System not sludged up or blocked. If rest of system blocked off it will flow. Flow just too week if all system is on. Boiler output 105,000. 20 rooms in house so some distances involved.

ChrisR · 27 Aug 2006

More pumping sounds reasonable then. Cheapest option is probably to put 2 pumps in parallel, switched on by different zone valves. Sounds too many rooms to have on one zone.
There are more sophisticated ways which would cost more to install but be more efficient.
Consider Grundfos Alpha.

desbarron · 27 Aug 2006

Thanks. Is there any reason why I cant put the second pump into the zone, which is not separated from the main circuit, by connecting it to the heating valve. Putting in an additional zone valve would not be too easy. There is no reason to have seperate zones. Des

Paul Barker · 27 Aug 2006

Yes carry on.

breezer · 27 Aug 2006

just a thought, what about a bigger pump? and is the speed of the current pump on 3?

do bear in mind i am not a plumber or heating engineer, which is why i said just a thought

desbarron · 27 Aug 2006

Thanks Paul. Before I go ahead. What are your credentials.
Des

Paul Barker · 27 Aug 2006

Economist, part qualified accountant, specially trained children's nurse (HND level), child protection qualified to degree level, teahcer qualified to degree level, corgi registered, unvented certificate part P qualified, water regulations trained, energy efficiency certificate, qualified in Natural gas and LPG, but more iimportantly **** hot at everything I ever do.

Forgot about top rider (despatch)at A-Z city office for 7 years.

Successful husband since 1980, father of two lovely children.

World renowned designer and scratch builder of valve amplifiers.

Biggles.. · 27 Aug 2006

Ive got my 10metres swimming badge.What about you Paul?

Paul Barker · 27 Aug 2006

You got me.

desbarron · 27 Aug 2006

Great CV.
Hope I did not offend you but there are so many idiots about.
Do not be too upset about the swimming badge, your welcome here anytime to practice.
Thanks again.
des

Paul Barker · 27 Aug 2006

Can I sell you a groundsource heatpump for your swimming pool, would probably pay back in about 50 years?

Biggles.. · 27 Aug 2006

Paul could you please do my books cos when you tell me i have to pay tax and i start to bash my head against the wall you'll also be able to treat me.No stereo typing intended.

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TWO PUMPS

breezer

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