Maintenance
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• Loose the four nuts (13) and remove the two double clamps (14).
• Pull up the four heating elements (15)
• Reinstall in reverse order using new heating elements.
Remark
Install the clamps (14) in a position which allows the heating elements to move at
least 5 mm in vertical (axial) direction. Insert the thermocouple deep enough, to
touch the combustion tube and fix it with the spring.