Viessmann VITODENS 300 Service Instructions Manual page 3

Safety instructions
If you smell flue gas
Danger
Flue gas can lead to life-threa-
tening poisoning.
Shut down the heating sys-
tem.
Ventilate the boiler room.
Close doors to the living
space.
Repair work
on parts that fulfil a safety function is
not permitted.
Use only original Viessmann spare
parts, or equivalent parts that have
been approved by Viessmann.
(cont.)
Service work on the heating system
Isolate the system from the power
supply and check that it is no longer
'live', e.g. by removing a separate
fuse or by means of a mains isola-
tor.
Safeguard the system against
unauthorised reconnection.
When using gas as fuel, also close
the main gas shut-off valve and
safeguard against unauthorised
reopening.
Ancillary components, spare and
wearing parts
!
Safety instructions
Please note
Components which are not
tested with the heating system,
the installation of non-
approved spare parts and un-
authorised conversions may
lead to damage on the heating
system, or may affect its func-
tion and void all warranties.
For conversions or replace-
ments, use only original spare
parts supplied or approved by
Viessmann.
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