Viessmann Vitorondens 200-T Service Instructions Manual page 2

Safety instructions
Safety instructions
Please follow these safety instructions 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 environmental pollution.
Note
Details identified by the word "Note" contain additional
information.
Target group
These instructions are exclusively intended for quali-
fied contractors.
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 electrician.
The system must be commissioned by the system
■
installer or a qualified person authorised by the
installer.
Regulations
Observe the following when working on this system:
Statutory regulations regarding the prevention of
■
accidents
■ Statutory regulations regarding environmental pro-
tection
Codes of practice of the relevant trade associations
■
All current safety regulations as defined by DIN, EN,
■
DVGW, TRGI, TRF, VDE and all locally applicable
standards
■ Gas Safety (Installation & Use) Regulations
– the appropriate Building Regulation either the
Building regulations, the Building Regulation (Scot-
land), Building Regulations (Northern Ireland),
– the Water Fittings Regulation or Water Bylaws in
Scotland,
– the current I.E.E. Wiring Regulations.
2
If you smell gas
Danger
Escaping gas can lead to explosions which may
result in serious injury.
■ Do not smoke. Prevent naked flames and
sparks. Do not switch lights or electrical appli-
ances on or off.
Close the gas shut-off valve.
■
Open windows and doors.
■
■ Evacuate any people from the danger zone.
■ Notify your gas or electricity supply utility from
outside the building.
Shut off the electricity supply to the building
■
from a safe place (outside the building).
If you smell flue gas
Danger
Flue gas can lead to life-threatening poisoning.
Shut down the heating system.
■
■ Ventilate the installation site.
■ Close all doors in the living space.
Flue systems and combustion air
Ensure that flue systems are clear and cannot be
sealed, for instance due to accumulation of conden-
sate or other causes. Ensure a sufficient supply of
combustion air.
Instruct system users that subsequent modifications to
the building characteristics are not permissible (e.g.
cable/pipework routing, cladding or partitions).
Danger
Life-threatening poisoning caused by carbon
monoxide in the flue gas occurs as a result of
leaking or blocked flue systems or an insufficient
supply of combustion air.
Ensure the flue system is in proper working
order. It must not be possible to close apertures
for interconnected combustion air supply.
Extractors
Operating appliances that extract air to the outside
(cooker hoods, extractors, air conditioning units, etc.)
can create negative pressure. If the boiler is operated
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 poisoning due to
reverse flow of the flue gas.
Fit an interlock circuit or take suitable steps to
ensure a sufficient supply of combustion air.