can't locate pressure valves for boiler

[pgpg]

Happy xmas to all
Trying to repressurise boiler (it's dropped to below 1, very close to red) but can't see any valves to turn... photo attached
boiler is a potterton promax combi HE Plus
am very inexpert
any advice much appreciated
advance happy NY

 

[cross thread]

Probably at the front right

 

[cross thread]

Most pro max have the built in loop, look under to the front right
Ignore the black Valves that are the feeds to and from the boiler

 

[pgpg]

thank you so much. sorted.
i think it's a pegler bulldog loop
in any case - doesn't have black valves - had to use a flat head screwdriver
mystery solved. thanks for quick response.