Ideal Boilers Mexico Super FF440 Installation And Servicing Manual

30 Mexico Super FF440 - FF480 - Installation & ServicingSERVICING58 BURNER AND CONTROLS ASSEMBLY REMOVAL1. Remove the silicon rubber tube from the sensing point.2. Disconnect the fan leads.3. Remove the M4 screw securing the flue connector to thefan.4. Slacken the M4 screw securing the flue connector to theturret front panel.5. Disconnect the silicon rubber tube from the top of thecollector hood.6. Remove the 4 M4 screws on the top of the collector hoodand by sliding it forwards remove collector hood/fanassembly.7. Check that the fan impellor runs freely. Remove any debrisfrom the impellor with a soft brush.8. Remove the flue baffles.9. Remove all loose deposits from the heat exchanger,particularly between the fins, using a suitable brush.10. Re-assemble in reverse order. Lubricate fan 'O' ring withsilicon grease. Ensure the fan leads and 2 sensing tubesare reconnected.59 CLEANING THE BURNER/PILOT ASSEMBLY60 CLEANING THE FAN/FLUE WAYSmex 7221FF440 & FF450 Only1. Remove the 2 screws and lift off the lowerfront panel. Refer toFrame 57.2. Remove the grilleassembly. Undo thegas cock union.3. Disconnect theignition lead from thePCB.4. Remove the 4 wingnuts and withdraw theburner and controlsassembly, complete,from the boiler.5. Place on a convenientworking surface.1. Brush off any deposits that may have fallen onto theburner head (ensuring that the flame ports areunobstructed) and remove any debris that may havecollected.Note. Brushes with metallic bristles MUST NOT beused.2. Remove the main burner injector. Check, clean orreplace, as required.3. Refit the injector, using an approved jointing compound.4. Inspect the pilot burner and ignition/detection electrode;ensure they are clear and in good condition.Check that:a. The pilot burner is clean and unobstructed.b. The ignition/detection electrode is clean andundamaged.c. The ignition/detection lead is in good condition andsecurely connected.d. The spark gap is correct. Refer to Frame 69.e. The position of the ignition/detection electrode relativeto the pilot burner is correct. Refer to Frame 69.5. Clean or renew components as necessary.SERVICING