Baxi Ecogen 24/1.0 Installation & Servicing Instructions Manual page 59

1. Disconnect the electrode leads, noting their positions.
2. Using a 7mm ring spanner remove the 2 long nuts securing each of the electrodes to the engine burner.
3. Replace the sealing gaskets.
4. When replacing the electrodes ensure that they are offered to the assembly vertically to avoid damaging/snagging the internal ceramic block.
5. Reassemble in reverse order.
page 61
14.4 Fan, Venturi ­ Spool Valve (Figs. 59 & 60)
1. Undo the nuts on top of the gas valves.
2. Remove pipes from the venturis.
3. Remove electrical connections from fan and spool valve motor.
4. Undo the three screws securing the manifold onto the burner door.
5. Undo the nut retaining the 22mm pipe at the centre of the engine air/gas manifold.
6. Remove the three screws holding the spool valve on to the side panel. Lift the assembly out.
7. Examine the burner gasket and replace if necessary.
8. Reassemble in reverse order, ensuring that the injector is in place and the sensing pipe is connected to the venturis.
14.5 Spool Valve Motor (Figs. 59 & 60)
1. Remove the Fan, Venturi ­ Spool Valve Assembly as in section 14.4.
2. Remove the 3 screws holding the motor in place.
3. Reassemble in reverse order ensuring the motor drive shaft engages correctly in the spool motor.
14.6 Venturis/Air Flow Straighteners (Figs. 59 & 60)
1. Remove the Fan, Venturi ­ Spool Valve Assembly as in section 14.4.
2. Remove the 8 manifold screws and the 8 nuts attaching the venturis to the 2 air flow straighteners.
3. Slide the venturis and then the air flow straighteners off the long M5 studs.
4. Clean/replace as necessary. Reassemble in reverse order.
14.7 Fan (Figs 59 & 60)
1. Remove the Fan, Venturi ­ Spool Valve Assembly as in section 14.4.
2. Remove the 4 M5 screws on the fan flange.
3. Reassemble in reverse order.
14.8 Spool Valve (Figs 59 & 60)
1. Remove the Spool Valve Motor, Venturi, Air Flow Straighteners and Fan ­ see relevant sections above.
2. Remove the countersunk M5 screw retaining the spool valve bush and carefully withdraw the spool valve from the body.
Do not allow the spool valve to slide out in an uncontrolled manner as this may result in damage to the component.
3. Clean/replace as necessary. Reassemble in reverse order.