Ideal Boilers Optia HE 9 Installation And Servicing Instructions

34 Optia HE - Installation & ServicingSERVICING1. Remove the air pressure switch and CO/CO 2 sensing pipes.2. Disconnect the electrical connections.3. Remove the 2 fan fixing screws and remove the fan by pullingforward.55 CLEANING THE FAN ASSEMBLY / THE FLUEWAYS56 CLEANING THE BURNER AND PILOT ASSEMBLY1. Brush off any deposits that may have fallen on to theburner head (ensuring the flame ports are unobstructed)and remove any debris that may have collected.Note. Brushes with metallic bristles must not be used.2. Remove the main burner injector and ensure there is noblockage or damage. Clean or renew as necessary.3. Refit the injector, using an approved jointing compoundsparingly.4. Inspect the pilot burner and ignition / detection electrode.Ensure that they are clean and in good condition.Check that:a. The pilot burner injector is not blocked or damaged.Refer to Frame 67 for removal details.b. The pilot burner is clean and unobstructed.c. The ignition / detection electrode is clean andundamaged.d. The ignition / detection lead is in good condition.e. The spark gap is correct (refer to Frame 67) Clean orrenew as necessary.Note. The pilot shield is located around the pilot assemblybracket and is located by the electrode retaining nut.57 CLEANING THE RECUPERATOR1. Remove the 2 rubber grommets togain screwdriver access toremove the side tie rods retainingthe combustion chamber andremove the tie rods. (Note. thecombustion chamber is alsoretained with 2 front tie rods on theHE15 and HE18 only.2. Remove the combustion chamber.3. Remove the sump rubber hoseconnection.4. Unclip the two side sumpretention clips and remove thesump.4. Pull off the two electrical connections to the flue protectionthermostat.5. Clean the sump of any debris.6. Clean between the recuperator fins with asuitable strip of steel.5. Slacken the two M5 nuts on the front tie rods, releasing thetie rods from the combustion chamber.6. Unhook the rear collector hood tags and remove collector hood.7. Remove the flue baffles.8. Remove all loose deposits from the heat exchanger,particularly between the fins, using a suitable brush.9. Check that the fan impellor runs freely. Remove any debrisfrom the impellor with a soft brush.10. Re-assemble in reverse order.7. Re-assemble in reverse order, ensuringrubber grommets are replaced.4321614SERVICING