worcester greenstar 28i junior pressure problem

[beatstreetz]

hi,
i've recently had one of these boilers fitted(3 months),
tonight i've noticed that the rads needed bleeding so i done so,
then the boiler pressure just bottomed out to zero it was on around 1bp before which i thought was quite low,
i've tried going through the manual looking for the pressure valve but cannot seem to find it nor could i find the special key you need to use,
would the plumber have made another pressure building valve outside of the combi there seem to be a few valves within the pipes outside the combi,
strange question but something is not quite right,
many thanks,
stuart

 

[bengasman]

if it does not show a filling valve in the manual, look for the external one close to the boiler.
probably the old silver braided loop going form the mains water pipe to the heating return pipe.
should not be far away as you need to be able to see the pressure gauge on the boiler.