Viessmann Vitodens 100-W Installation And Service Instructions Manual page 4

Safety instructions
Safety instructions
What to do if water escapes from the
appliance
Danger
When water escapes from the
appliance there is a risk of elec-
trocution.
Switch off the heating system at
the external isolator (e.g. fuse
box, domestic power distribu-
tion).
Flue systems and combustion air
Ensure that flue systems are clear and
cannot be sealed, for instance due to
accumulation of condensate or other
causes. Ensure an adequate supply of
combustion air.
Instruct system users that subsequent
modifications to the building character-
istics are not permissible (e.g. cable/
pipework routing, cladding or parti-
tions).
Danger
Leaking or blocked flue sys-
tems, or an inadequate supply
of combustion air can cause life
threatening poisoning from car-
bon monoxide in the flue gas.
Ensure the flue system is in
good working order. Vents for
supplying combustion air must
be non-closable.
4
(cont.)
Extractors
Operating appliances that extract air to
the outside (cooker hoods, extractors,
air conditioning units, etc.) can create
negative pressure. If the boiler is oper-
ated at the same time, this can lead to
reverse flow of the flue gas.
Danger
The simultaneous operation of
the boiler and appliances that
extract air to the outside can
result in life threatening poison-
ing due to reverse flow of the
flue gas.
Fit an interlock circuit or take
suitable steps to ensure an ade-
quate supply of combustion air.