Warning
Always disconnect the mains supply and close
the main gas tap when working on the boiler.
Warning
Check the entire system for leaks after
maintenance and servicing work.
Danger
For safety reasons, we recommend fitting smoke
alarms at suitable places and a CO detector near
the appliance.
Caution
Make sure the boiler can be reached at all
times.
The boiler must be installed in a frost-free area.
If the power cord is permanently connected, you
must always install a main bipolar switch with
an opening gap of at least 3 mm (EN 60335-1).
Drain the boiler and central heating system if
you are not going to use your home for a long
time and there is a chance of frost.
The frost protection does not work if the boiler is
out of operation.
The boiler protection only protects the boiler,
not the system.
Check the water pressure in the system
regularly. If the water pressure is lower than 0.8
bar, the system must be topped up
(recommended water pressure between 1.5 and
2.0 bar).
Important
Keep this document near to the boiler.
Important
Only remove the casing for maintenance and
repair operations. Refit all panels when
maintenance work and servicing are complete.
Important
Instruction and warning labels must never be
removed or covered and must be clearly legible
throughout the entire service life of the boiler.
Damaged or illegible instructions and warning
stickers must be replaced immediately.
Important
Modifications to the boiler require the written
approval of De Dietrich.
1 Safety
7762666 - v.02 - 29092020
C 340 / C 640
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