central heating


Postby Declan Hanratty » Mon Oct 06, 2008 3:10 pm

when my boiler has heated the water or heating to the required temp it obviously cuts out until required again but as it does so it sounds like an airplane coming into land ie very noisy.
can anybody help please
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Postby plumbbob » Mon Oct 06, 2008 6:02 pm

Have you tried turning off the landing light? Oops, sorry.

What type of boiler is it? Combi? Is this a new problem? Is it water boiling or a mechanical sound?
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Postby htg engineer » Mon Oct 06, 2008 6:18 pm

May be kettling - build up of limescale in the heat exchanger and primaries (if older system), noise reducer or descaler can be added to the system.


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Postby Declan Hanratty » Tue Oct 07, 2008 7:06 am

Thanks it is a fairly old system not a combi.
where would I add the descaler or noise reducer?
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Postby Steve the gas » Wed Oct 08, 2008 4:46 am

Tie up the ball cock up over your small tank - to stop more water going in.
Drain some water out the system - a drain off point or rad.
Add product to tank put CH on for a while then untie ball cock arm.
Voila!
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Postby makmak » Wed Oct 08, 2008 2:50 pm

Hi,

I wander if anyone would be good enough to give me some advice.

I got a quote for a new central heating system for a 2 storey, 3 bedroom house, can I ask your opinion and do you think that sounds like a decent price? and is the brands used for radiators and boiler ok?

Thanks for your help

QUOTE
-------
Supply & Fit New Central Heating System Including (removing old system):
TRV's, Chemically Treated, Fully Interlocked, Corgi Certification Upon Completion (21 Days)
8 Kermi Radiators (10 year guarantee):
600 x 600 (2)
800 x 600 (3)
1200 x 600 (2)
Towel Radiator (1)
Piping: Copper

Boiler:
Make: Viessman combi with condenser (includes timer/room thermostat)
Size: 30KW
Efficiency Band: A
Guarantee: 5 years parts and labour

Timescale: 3 days
Total Price: £2460
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Postby Steve the gas » Thu Oct 09, 2008 4:15 am

Makmak,

I think you have been answered on this, and NOT just on this DIY site.
Bet they will finish it in 2 days though
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