While you wait for answers, we may have found some information which could help you.
Click here for Boiler Heating Potterton PrimaPotterton Prima 30F?
How to replace Potterton EP 3002 with EP 2?
My potterton boiler keeps losing water pressure and condens?
Potterton Prima 60F- can you start it manually?
potterton 16/22 pilot lihght out?
Potterton EP2000 - pump control?