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Chapter 2, OPERATION Step 5: Step 6: ☞ Remove the front panel. Clean the inside of the heater. 14. Before consulting an expert Before starting to clean the heater, ensure that the interior is cool enough to touch. Wipe all dust off the outside of the housing with a clean, non-fluffy, damp cloth or another suitable cleaning aid. Do not forget to clean the outside of the heat chamber and the heat exchanger. While switching the heater on or off Step 7: Re-attach the front panel. Step 8: Insert the heater plug into the socket. Step 9: Switch the heater ON. Step10: Re-programme the heater (clock and set-back timer). Attention: If the heater overheats after the completion of a recovery procedure, contact your dealer and do not switch the heater on until the problem has been resolved. 13. Cleaning the filter (monthly) The filter of the fuel pump must be cleaned each month and at the end of the heating season. a) Open the flap on the right of the heater. b) Close the cut-off valve on the fuel pipe. c) Place the fuel collecting gutter under the float house in order to prevent fuel spills. Collect the fuel in a container. d) Unscrew the plate covering the filter. e) Remove the filter and clean it carefully with compressed air. f) Replace the filter and screw the covering plate back into position. g) Wipe away the spilled fuel. h) Open the cut-off valve in the fuel pipe. Ensure that there are no fuel leaks. Note: At the end of the heating season, remove any fuel remaining in the float house by unscrewing the drain plug. The following situations do not indicate defects. White smoke can be seen when the heater is switched on for the first time. Machine oil or dust on the burner chamber or heat exchanger is burning. The flames flicker for several minutes after the heater has been ignited. The ignition rod continues to function when the heater is cold, even several minutes after ignition. This may cause the flames to be a little larger. The heater makes intermittent creaking sounds when warming up or cooling down. Expansion and shrinkage of metal parts may cause a slight creaking sound. Circulation of air in the room does not start immediately when the heater is lit. To prevent unpleasant cold draughts, the ventilator only switches on when the heater has become warm. A loud clicking sound can be heard during the first use or when the fuel runs out. There is air in the fuel pump. This should be gone within approximately 1 minute. If the clicking sound in the fuel pump does not stop after approximately 1 minute, push the red ‘reset’ button on the float chamber (do not hold it in). Also check whether all the fuel valves are open, the fuel filters are clean and whether there is sufficient fuel. Note: The fuel pump may make a slight ticking sound during normal operation. This does not indicate a problem. While the heater is in operation A part of the burner pot and/or heat exchanger becomes red in colour during operation. This is normal and does not indicate a problem. 95