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6 Routine ServicingTo ensure continued efficient operation of the appliance, it is recommended that it is checkedand serviced as necessary at regular intervals. The frequency of servicing will depend upon theparticular installation conditions and usage but in general once a year should be adequate. It isthe law that any service work must be carried out by a competent person such as a British Gasengineer or other CORGI registered personnel.The boiler incorporates a flue sampling point in front of the flue outlet, see Figure 5/C. Theservice engineer has suitable equipment to analyse the flue gas. The push fit cap may beremoved and a sample tube fitted. The push fit cap must be replaced after use. The flue gassample will enable the service engineer to judge whether any major action is required. Refer tosection 5.4.Before commencing any service operation, ISOLATE the mains electrical supply and TURN OFFthe gas supply at the appliance service cock.Figure 6/A Burner Assembly44
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