Worcester 30 CDi Drain Point - How to use?

[Mmark]

My radiators don't have a drain point.

Looking at my Worcester 30 CDi the manual says it has a "drain point", although doesn't say how to use it. I cannot see any key or anything else I can turn. This picture looks just like the drain valve I can see:
http://www.plumbcenter.co.uk/en/hea...arts/worcester-bosch-87167714320-drain-valve/

Any ideas?

 

[PrenticeBoyofDerry]

Have you checked for a drain off valve at the lowest point, either radiator or possibly if you have a cellar, on pipework in there.
Why are you draining system down?

 

[Mmark]

Have you checked for a drain off valve at the lowest point, either radiator or possibly if you have a cellar, on pipework in there.
Why are you draining system down?

There use to be drain points on my radiators. When the last plumber changed my radiators, he replaced them with valves that did not have a drain point. I'm removing some radiators, for the painters and decorators.

I cannot see anything else in the basement (where the boiler is). Can I not use the "drain point" that is on the actual boiler?

 

[Mmark]

I've found this, see page 10, for the "drain point". This looks just like my boiler:
http://www.buildbase.co.uk/link/1/h036168_29702_t.pdf

 

[gigz]

To use this drain you have to remove the boiler cover, what kind of filling loop do you have ? If its an external one you might be lucky and the nrv might be on the cold feed side.

 

[PrenticeBoyofDerry]

You are not supposed to remove the casing, unless you are GS registered.
Have you checked for drain off on the flow/return pipes at the boiler.

 

[Mmark]

To use this drain you have to remove the boiler cover, what kind of filling loop do you have ? If its an external one you might be lucky and the nrv might be on the cold feed side.

Boiler cover is already off. It looks like page 10 in this pdf (color photo). The drain point is on the right. I can see the drain point, I just can't see anything I can turn, to get the water to actually drain.
http://www.buildbase.co.uk/link/1/h036168_29702_t.pdf

The installer rigged it up to the mains for the CH pressurisation, the pipe is on the left and has two external isolating valves. I turn both to pressurise the system.

 

[gigz]

If the boiler covers already off, put hose over drain spout and turn the square bit anti-clockwise.

 

[gigz]

Re the filling loop. If the shorter of the two valves is connected to the heating pipe just take braided hose off the other (longer) valve and drain into a bucket.

 

[Mmark]

Re the filling loop. If the shorter of the two valves is connected to the heating pipe just take braided hose off the other (longer) valve and drain into a bucket.

ok I see what you mean. I use one isolator to keep the mains shut off. I then undo the pipe at the other isolated, and then release that isolator to drain.

One last Q, is the "drain point", in the picture on page 10, not actually a drain point? See like this is what I should be using?

 

[flameport]

I'm removing some radiators, for the painters and decorators.

It is not necessary to drain the system for that.
Turn off the valves for the radiator, remove radiator, put a cap on each valve outlet.
The only water removed is what was contained in the radiator.

 

[Mmark]

ok, all good, thanks.