DE DIETRICH TWINEO EGC 25 - Manual (Page 22)

4
Open and close the radiator valves several times a year (this
prevents the valves from seizing up).
4
Clean the outside of the boiler using a damp cloth and a light
detergent.
CAUTION
Only a qualified professional is authorised to clean the
inside of the boiler.
1 2
3
4
T000181-B
5. Checking and maintenance EGC 25
21 03/12/2013 - 300026082-001-02