Convert to sealed system
- Thread starter doug p
- Start date
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Why ?
As far as I can tell the only boiler with the 330 title is the BG 330 which was made by GW specifically for BG but not marketed by GW under their own brand name.
That boiler is suitable as supplied for open or sealed systems.
To convert a system to sealed a filling loop, properly sized expansion vessel and PRV with external discharge will be required.
It is generally considered that these should only be installed by GS engineers on account of the dangers of wrongly configured sealed systems and the PRV discharge point.
Indeed when boilers for sealed systems were first introduced during the late 70s it was intended that installers should take a qualification in respect of fitting sealed systems. However that was when the industry was not very well regulated and before CORGI had been set up and with the rapid introduction of combi boilers on sealed systems no specific qualification was ever introduced.
So my view is that conversion to a sealed system is not suitable for a DIY installation unless it is professionally checked before being brought into use.
Tony
That boiler is suitable as supplied for open or sealed systems.
To convert a system to sealed a filling loop, properly sized expansion vessel and PRV with external discharge will be required.
It is generally considered that these should only be installed by GS engineers on account of the dangers of wrongly configured sealed systems and the PRV discharge point.
Indeed when boilers for sealed systems were first introduced during the late 70s it was intended that installers should take a qualification in respect of fitting sealed systems. However that was when the industry was not very well regulated and before CORGI had been set up and with the rapid introduction of combi boilers on sealed systems no specific qualification was ever introduced.
So my view is that conversion to a sealed system is not suitable for a DIY installation unless it is professionally checked before being brought into use.
Tony
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So to cut a long story short, you don't need to be GS registered.
The total lack of initiative leads me to believe it would not be wise or safe for you to undertake the work
You may not need to be Gas-Safe but you do need to be competent and have a thorough understanding of sealed systems.
Be aware that your existing pipework and fittings might leak under a sealed system, not always but it is a possibility, you do not have to be gas safe registered to do this and it is a fairly easy job, this is the kit you need.
http://www.rwc.co.uk/product/easifit-sealed-system-kits/
http://www.rwc.co.uk/product/easifit-sealed-system-kits/
I would recommend changing the rad valves if they are old before converting to a sealed system.
Its easier to do that then having to drain again to change some when they leak. I charge quite a lot for doing that as it can be time consuming.
It would be rare for reasonable quality valves to leak if they are less than 6-7 years old. More than 20 years and quite possible!
Tony
Its easier to do that then having to drain again to change some when they leak. I charge quite a lot for doing that as it can be time consuming.
It would be rare for reasonable quality valves to leak if they are less than 6-7 years old. More than 20 years and quite possible!
Tony
wouldn't be the first time ive blown a hole in a rad either
leaky valves are a norm change the lot while your at it
and make sure it is well flushed both hot and cold
wouldn't be a bad idea to put some cleanser in the system for a few weeks before you start
kevplumb corgi registered pipefitter
for pipework industrial up to 2.5 MW commercial and of course domestic
as well as servicing and repairs
now sinking piles because I got sick of all the crap and smart asses in this industry
Oh and pretty important (seems to have been overlooked), don't forget to size the Expansion Vessel accordingly.
Hi Kev, you must be the only 'Corgi' registered pipe monkey living in your Trailer Park??!! I'm amazed Trump has not deported you yet??!! Soon son, soon!!
if you bothered putting either of your brain cells to work puller you would know ive been back in the UK a while now
in fact I was up in your neck of the woods last month
couldn't find you though and the shotgun had to be returned by 5
in fact I was up in your neck of the woods last month
couldn't find you though and the shotgun had to be returned by 5
On at least one of the 330 models you had to use the correct kit to seal it you could not just add an external vessel and PRV because the kit came with some extra wiring.
And you could only run the boiler at up to 18kW IIRC.
I did have a kit in the garage but not sure I kept it when I stopped fitting for them
And you could only run the boiler at up to 18kW IIRC.
I did have a kit in the garage but not sure I kept it when I stopped fitting for them
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