Viessmann Vitodens 050-W Installation And Service Instructions Manual page 2

Safety instructions
Safety instructions
Please follow these safety instruc-
tions closely to prevent accidents
and material losses.
Safety instructions explained
Danger
This symbol warns against the risk
of injury.
!
Please note
This symbol warns against the risk
of material losses and environmen-
tal pollution.
Target group
These instructions are exclusively inten-
ded for qualified contractors.
Regulations to be observed
National installation regulations
■
Statutory regulations for the prevention
■
of accidents
Statutory regulations for environmental
■
protection
Safety instructions for working on the system
Working on the system
Where gas is used as the fuel, close
■
the main gas shut-off valve and safe-
guard it against unintentional reopen-
ing.
Isolate the system from the power sup-
■
ply, e.g. by removing the separate fuse
or by means of a mains isolator, and
check that it is no longer 'live'.
2
Note
Details identified by the word "Note"
contain additional information.
Work on gas installations must only be
■
carried out by a registered gas fitter.
Work on electrical equipment must
■
only be carried out by a qualified elec-
trician.
The system must be commissioned by
■
the system installer or a qualified per-
son authorised by the installer.
Codes of practice of the relevant trade
■
associations
Relevant country-specific safety regu-
■
lations
Safeguard the system against recon-
■
nection.
Wear suitable personal protective
■
equipment when carrying out any work.