Baxi Ecogen 24/1.0 Installation & Servicing Instructions Manual page 64

Fig. 66a ­ Fig. 67
page 65
14.16 PCB Main (Figs. 68,69 &70)
1. Undo the 4 screws from the bottom cover and remove the cover.
2. Undo the 2 screws securing the control tray, pull the assembly forward and carefully allow the assembly to drop down.
3. Remove the 2 screws securing the control cover at the left hand corners. Lift at the left hand side and disengage from the G83/24V power supply housing on the right.
4. Carefully remove the connections. There are three connections to each burner control unit (BCU). Four connections on the main board and fifteen around the edge.
5. Remove the screw at the back left hand corner. Push the PCB/cover assembly back (approx 10mm) and lift out the assembly.
6. Reassemble in the reverse order.
NOTE: The connections are "justified" so that it is impossible to connect up incorrectly.