Viessmann VITODENS 300 WB3A, Service Instructions Manual

Page: 19 / 148

If you smell flue gas
Danger
Flue gas may lead to life-threa-
tening poisoning.
& Shut down the heating sys-
tem.
& Ventilate the boiler room.
& Close all doors leading to the
living space.
Repair work
It is not permitted to carry out repairs
on parts that fulfil a safety function.
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 mains sup-
ply, e.g. by removing a separate
fuse or by means of a mains electri-
cal isolator, and check that it is no
longer 'live'.
& 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
!
Important information
Components which are not
tested with the heating system,
the installation of non-
approved spare parts and
unauthorised conversion may
lead to damage to the heating
system, which may affect their
function and limit our warranty.
For conversions or replace-
ments, use only original parts
from Viessmann or those which
are approved by Viessmann.
Safety instructions
(cont.)
3
Safety instructions
56
92
550
GB