Working on the 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.
Repair work
!
Please note
Repairing components which
fulfil a safety function can com-
promise the safe operation of
your heating system.
Replace faulty components
only with original Viessmann
spare parts.
Ancillary components, spare and
wearing parts
!
Please note
Spare and wearing parts which
have not been tested together
with the heating system can
compromise its function. Instal-
ling non
‐
authorised compo-
nents and non
‐
approved
modifications or conversions
can compromise safety and
may invalidate our warranty.
For replacements, use only ori-
ginal spare parts from
Viessmann or those which are
approved by Viessmann.
Safety instructions
(cont.)
3
Safety instructions
5692
618
GB
Summary of Contents for Vitolig 300
Page 27: ...Standard control Connection and wiring diagrams 27 Connection and wiring diagrams 5692 618 GB ...
Page 37: ...Parts list cont 37 Parts lists 5692 618 GB ...
Page 38: ...Parts list cont 38 Parts lists 5692 618 GB ...
Page 39: ...Parts list cont 39 Parts lists 5692 618 GB ...
Page 40: ...Parts list cont 40 Parts lists 5692 618 GB ...
Page 41: ...Parts list cont 41 Parts lists 5692 618 GB ...
Page 42: ...Parts list cont 42 Parts lists 5692 618 GB ...
