I had a Glow Worm Energy7 15r boiler fitted a year ago. I also cannot get the pressure displayed at the boiler despite what is stated in the Operating Instructions.
I have a red expansion vessel with kit that includes the Filling loop and Safety relief valve complete with gauge.
On page 19 of my Glow worm Energy7 Regular Installation and Maintenance Instructions it states: ‘A pressure gauge with a set pointer and covering at least 0 to 4 bar (0 to 60 lb/in2) shall be fitted permanently to the system in a position where it can be seen when filing the system’.
The Glow Worm GAS BOILER SYSTEM COMMISSIONING CHECKLIST includes: ‘The operation of the boiler and system controls have been demonstrated to and understood by the customer’
The Operating Instructions state: ‘Once a month, check that the pressure in the central heating system, which is displayed on the user interface, is between 0.05 MPa and 0.27 MPa (0.5 bar and 2.7 bar).’ How can you do this if there is no pressure gauge?
In my opinion the installation is not complete if there is no pressure gauge. I would claim of the installer. If that does not succeed I would put a warranty claim to Glow worm. IMO Glow Worm is also at fault, both for incorrect information in the Operating Instructions and because their approved installer failed to complete the installation.