Ideal Boilers Classic FF 340 LF Installation And Servicing Manual

Also see for Classic FF 340 LF: User guide

Classic FF 340 - 360 LF - Installation & Servicing 33SERVICING65 GAS CONTROL VALVE REPLACEMENTNote.Refer also to Frame 76 of 'Exploded Views' forillustration of the procedure detailed below.1. Refer to Frame 57.2. Remove the burner and air box assembly. Refer toFrame 52.3. Remove the fixing screws.Swing the control box down into the servicing position.4. Disconnect the gas control valve electrical leads.5. Undo the gas cock union .6. Whilst supporting the gas control valve, remove the 2screws retaining the manifold to the back panel.7. Remove the gas control / manifold assembly.8. Remove the 4 screws retaining the manifold to the gascontrol valve, and fit the manifold to the new valve.Ensure that the new control is fitted the correct wayround (an arrow engraved on back indicates thedirection of flow).9. Transfer the gas cock union to the new gas controlvalve, using an approved jointing compound.10. Reassemble in reverse order.11. Check the operation of the boiler.1. Refer to Frame 57.2. Remove the burner and air box assembly. Refer to Frame 52.3. Remove the electrode retaining nut.4. Remove the pilot shield.5. Remove the ignition electrode and integral lead.6. Refit the new electrode and lead in reverse order.Ensure that the pilot shield is replaced.7. Check the spark gap. Refer to Frame 62.8. Reassemble in reverse order.9. Check the operation of the boiler.63 IGNITION ELECTRODE AND LEAD REPLACEMENT1. Refer to Frame 57.2. Remove the screw retaining the front burner supportstrap to the combustion chamber.3. Remove the M5 pozi screw, situated at the left handbottom rear of the burner. Pull the burner downward todisengage the retention tab and remove the burner.4. At this stage the main burner injector can be removed,checked, cleaned or replaced as required. Ensure thata new copper sealing washer is used.5. Fit the new burner, ensuring that the retention tab iscorrectly located in the air box slot and reassemble inreverse order.6. Check the burner for cross-lighting and flame stability.64 MAIN BURNER AND MAIN BURNER INJECTOR REPLACEMENTSERVICING