Combi Hell

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2 Mar 2004
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United Kingdom
Hi,

I want to re-route some pipework on my central heating system. I have a Halstead Platinum Combi boiler.

Is this the correct sequence of steps I need to follow.

1) Turn off the CH Flow and CH Return valves at the boiler
2) Drain down the CH system via a drain cock
3) Perform the work
4) Turn on the CH Flow and CH Return valves
5) Re-pressurise the boiler
6) Bleed the radiators

Also, If the job takes longer than expected can I fit isolators to the flow and returns so that the other
radiators in the house can work.

I have already lost a boiler due to ice damage recently and am loathed to experience it again.

Many Thanks.
 
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yes sounds ok to me you dont have to isolate the boiler if you dont want to doesnt make a great deal of difference.

as for iso valves it depends what pipe work your isolating if it is before the first rad and on the main flow and return then no the other rads wont work and unless your boiler has a bypass valve it will go bang. also if the other rads have trvs you also need some kind of a bypass valve or open radiator.
 
Not just any old isolating valves on the pipes. The Peglers full flow ones from Screwfix are ok. Cheap ones always leak.
 

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