Do you have a question about the Vaillant ecoFIT pure 425 and is the answer not in the manual?
Defines product use and required qualifications for installation and maintenance.
Covers gas, flue gas, electrical safety, weight, flammables, temperatures, water, frost, and safety devices.
Electrical installation, power supply, and flue pipe installation procedures.
Initial start-up, checking water quality, flushing, and gas settings.
Methods for eliminating faults, accessing fault memory, and replacing components.
Lists of status codes and fault codes with their meanings and causes.