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.
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
!
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.
Safety instructions
(cont.)
3
Safety instructions
5692
569
GB
Summary of Contents for Vitodens 300
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