VITODENS 200 WB2A - Heatingspares247.com

6 Routine Servicing6.1 Routine Servicinga) Remove the outer casing as follows: Open the lower hinged controls cover.Remove the two screws securing the bottom of the upper decorative cabinet andremove this by pulling forward and place in a safe position. Disconnect the fixingclips at the side of the control pod and hinge the pod forwards. (Refer to figure 5/F).b) Remove the sealed chamber front panel by removing the two fixing screws atthe bottom and hinge upwards unhooking from the top fixing lugs. Place thecover in a safe position.c) Pull electrical cable connector from the fan motor (A), pressure switch (B), gasvalve (C), ionisation electrode (D) and ignition unit (E).d) Disconnect the union and release the gas connection pipe taking care not tolose the sealing washer.e) Remove the four nuts (G) and remove the burner plate complete with the burner.f) Check the burner plate gasket for damage and change if necessary. Generallythis gasket should be changed every two years.6.2 Ignition and Detection Electrodesg) Remove the ignition and detection electrodes.h) Check the electrodes for wear and contamination.i) Clean the electrodes with a small non abrasive brush.j) Check all clearances. If the gaps are not as specified or the electrodes aredamaged, replace and align the electrodes together with new gaskets afterinspection of the burner. Tighten the electrode fixing screws to 2.5Nm.See diagrams overleaf45