HI
there is airlock in the pipe.connect a hose pipe to the cold tap and other end to the hot tap.open hot tap fully then open cold tap slowly leave it for 30-50 seconds or until mains pressure pushes air back into the tank .:D
HI
it is located inside the boiler on the bottom front left hand side.diaphragm costs few quid.easy to replace if any experience with the boiler otherwise it can be a nightmare. :D
HI
you cannot commission unvented system.it is a good system if all well
otherwise it can be dangerous.get another qualified engineer.also not all CORGI engineers are allowed to work on it.they need additional qualification for it.
FED UP OF COWBOYS ? TRY INDIANS
HI
buy a fitting which is called LEADLOCK .use it to connect lead to a copper.
then fit stoptap to copper .i will explain again.
old lead to LEADLOCK fitting
LEADLOCK fitting to new 22mm-15mm copper
copper to stoptap
happydays :D
HI
why are you doing this ?
1.people spend money to move boiler from the floor to the wall and you want opposite
2.it is bad idea to install the boiler under the worktop specially if it is wall mounted combi boiler.
3.worst place for a boiler
HI
sorry but i think you will struggle if you do not know how to drain the boiler.
1.turn off boiler at mains
2.turn off water at mains
3.release water from drain valve or any ch/boiler drain point.
4.open hot taps
5.rock and roll