Viessmann VITODENS 200 WB2A, Installation & Servicing Instructions Manual

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6 Routine Servicing
To ensure continued efficient operation of the appliance, it is recommended that it is checked
and serviced as necessary at regular intervals. The frequency of servicing will depend upon the
particular installation conditions and usage but in general once a year should be adequate. It is
the law that any service work must be carried out by a competent person such as a British Gas
engineer or other CORGI registered personnel.
The boiler incorporates a flue sampling point in front of the flue outlet, see Figure 5/C. The
service engineer has suitable equipment to analyse the flue gas. The push fit cap may be
removed and a sample tube fitted. The push fit cap must be replaced after use. The flue gas
sample will enable the service engineer to judge whether any major action is required. Refer to
section 5.4.
Before commencing any service operation, ISOLATE the mains electrical supply and TURN OFF
the gas supply at the appliance service cock.
Figure 6/A Burner Assembly
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