Viessmann VITOLIGNO 300-C Operating Instructions Manual page 4

Safety
Safety Instructions
What to do if the heating system develops a fault
WARNING
Fault messages indicate faults in the heating system.
If faults are not rectified, they can have life threatening
consequences. Do not acknowledge fault messages
several times in quick succession. Inform your heating
contractor so the cause can be analyzed and the fault
rectified.
Conditions for siting
WARNING
Sealed vents result in a lack of combustion air. This leads
to incomplete combustion and the formation of life
threatening carbon monoxide. Never cover or close existing
vents. Do not make any subsequent modifications to the
building characteristics that could affect safe operation
(e.g. cable/pipework routing, cladding or partitions).
WARNING
Easily flammable liquids and materials (e.g. naphtha,
solvents, cleaning agents, paints or paper) can cause
deflagration and fire. Never store or use such materials
in the installation room or in direct proximity to the
heating system.
IMPORTANT
Incorrect ambient conditions can lead to heating system
damage and can put safe operation at risk.
Ensure ambient temperatures are above 32°F (0°C) and

below 95°F (35°C).
Prevent air contamination by halogenated hydrocarbons

(e.g. as contained in paints, solvents or cleaning fluids)
and excessive dust (e.g. through grinding/polishing work).
Avoid continuously high humidity levels (e.g. through

continuous drying of washing).
4
(continued)
Extractors
The operation of appliances that extract air to the outside
(range hoods, extractors, air conditioning units, etc.) can
create vacuum pressure. If the boiler is operated at the
same time, this can lead to reverse flow of the flue gas.
WARNING
The simultaneous operation of the boiler and appliances
that extract air to the outside can result in life threatening
poisoning due to reverse flow of the flue gas. Take suitable
steps to ensure an adequate supply of combustion air.
If necessary, contact your heating contractor.
Auxiliary components, spare and wearing parts
IMPORTANT
Components not tested with the heating system may damage
the system or affect its function. Have all installation or
replacement work carried out exclusively by qualified
contractors.
Vitoligno 300-C Operating