Possible poisoning and burning by escaping hot flue gases!
It is possible that hot flue gases escape and could result in poisoning or burning, if the
boiler is operated
● without a completely installed air/flue gas duct,
● with an open air/flue gas duct,
● with internal leakages and an opened front casing.
● Operate the boiler with care for commissioning, for testing purposes.
● Operate the boiler in continuous mode only with closed front casing and completely
mounted and closed air/flue gas duct.
8.1.1 General inspection and maintenance instructions
To ensure the faultless operation, long term availability of all functions and long working life of
your Vaillant boiler and to prevent modifications to the approved se-ries status only genuine
Vaillant spare parts must be used when carrying out inspection, maintenance and re-pair work.
For an overview of the available original Vail-lant spare parts, contact the Vaillant sales office on
01634 292310.
During any inspection and maintenance or after change of parts of the combustion circuit, the
following must be checked:
● The appliance has been installed in accordance with the relevant installation
instructions.
● The integrity of the flue gas installation and flue seals is in accordance with the relevant
flue installation in-structions enclosed.
● Visual, the integrity of the boiler combustion circuit and relevant seals.
● The gas inlet working pressure at maximum rate as described in section 5.1.2.
● The gas flow rates as described in section 5.1.6.
● Correctness of electrical, water and gas connections.
● Correctness of the water pressure.
● The condition of the whole system, in particular the condition of radiator valves, evidence
of leakage from the heating system and dripping taps.
NOTE:
If it is necessary to keep the main switch on for certain inspection and maintenance, this
is indicated in the description of the maintenance task.
NOTE:
The boiler is fitted with a flue gas analysis point. A suitable flue gasanalyser can be
con-nected to this point to establish the combustion performance of the boiler.
Checking/adjustment of this value is required in the following instances; replacement of
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