Topping up pressure is straight forward, I would recommend talking directly to Ideal themselves who should be able to advise how to top up system pressure.
Someonewhoknowswhattheyareonabout
January 2017
Like this...
https://www.youtube.com/watch?v=F9DFW-hlWTo
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.