Operating instructions

Workingonthesystem
&
When using g as as fuel, also c lose
the main gas shut‐off valve and
safeguard against unauthorised
reopening.
&
Isolate the syste m 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.
!
Please note
Electronic modules can be
damaged by electro‐static dis-
charges.
Touch earthed objects, such as
heating or water pipes, to dis-
charge static loads.
Repair work
!
Please note
Repairing components which
fulfil a safety functi on can com-
promise the safe operation of
your heating system.
Replace faul ty 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. Inst al-
ling non‐auth orised compo-
nents and non‐ approved
modifications/co nversion can
compromise safety and may
invalidate our warranty.
For replacements, use only ori-
ginal spare parts from
Viessmann or those wh ich are
approved by Viessmann.
Safety instructions (cont.)
3
Safety instructions
5692 619 GB