Ideal Boilers Classic FF 340 LF Installation And Servicing Manual

Also see for Classic FF 340 LF: User guide

34Classic FF 340 - 360 LF - Installation & ServicingSERVICING67 AIR PRESSURE SWITCH (APS) REPLACEMENT1. Refer to Frame 572. Remove the 2 silicon rubber tubes from the fan sensing points.3. Disconnect the fan leads.4a. Rear flue. Slacken the M4 screw securing the flue connector to thefan. Disconnect the connector from the fan and slide into the flue.4b. Side or top flue. Slacken off two M4 screws securing the flue elbowand flue connector. Disconnect the flue connector from the elbow andslide into the flue. Remove the flue elbow.5. Disconnect the silicon rubber tube from the rear of the collector hood.6. Slacken the two M5 nuts on the front tie rods, releasing the tie rodsfrom the combustion chamber.7. Remove the M5 central fixing screw at the rear of the collector hoodand remove collector hood / fan assembly.8. Remove the three M4 screws retaining the fan to the collector hood.9. Fit the new fan and reassemble in reverse order, ensuring the fanleads, and 3 sensing tubes are reconnected.10. Check the operation of the boiler.66 FAN REPLACEMENT5. Disengage the PCB from the mounting posts and withdrawfrom the control box.6. Fit the new PCB and reassemble in reverse order.7. Check the operation of the boiler.Fuse.To change the fuse, prise it out of the holder and disengagethe fuse. Refer to Frame 75 for fuse location.1. Refer to Frame 57.2. Remove the APS fixing screw.3. Remove both sensing tubes from the APS.4. Remove the 3 electrical connections from the APS.5. Fit the new APS and reassemble in reverse order.6. Check the operation of the boiler.68 PRINTED CIRCUIT BOARD (PCB) REPLACEMENTNote.Refer to Frame 75 of 'Exploded Views' forillustration of the procedure detailed below.1. Refer to Frame 57.2. Remove the fixing screws and swing the control boxdown into the servicing position.3. Disconnect the detection lead from the PCB.4. Unplug all the Molex connectors from the PCB.69 COMBUSTION CHAMBER INSULATION REPLACEMENT1. Refer to Frame 57.2. Remove the burner and air box assembly.Refer to Frame 52.3. Remove the 4 tie rods.4. Remove the combustion chamber.5. Remove the 2 side panel retaining brackets.6. Remove the side insulation panels.7. Remove the front and rearinsulation panels.8. Fit the new front and rearinsulation panels.9. Fit the new side panels andretain with the brackets andscrews previously removed.10. Reassemble in reverse order.SERVICING