ICP G9MAE0601714A Service And Technical Support Manual

Contents

SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: (F/G)9MAESpecifications subject to change without notice.26 440 04 4700 00Figure 9 Burner AssemblyBURNER ASSYF LAME SENSOR(BELOW BURNER)F LAME ROLL−OUT SWITCHBURNER SUPT. ASSYL11F064Representative drawing only, some models may vary in appearance.Figure 10 Igniter Position − Top ViewA114052-1/2-in.(64.4)1-1/4-in.(31.8)9. Attach the wires to the roll-out switches.10. Align the burner assembly with the openings in theprimary cell inlet panel and attach the burner assembly tothe cell panel.11. Connect the wire for the flame sensor12. Connect the wire for the Hot Surface Igniter.NOTE: Use propane-resistant pipe dope to prevent leaks. Donot use Teflon tape.13. Install the gas pipe to the gas valve.! WARNINGFIRE OR EXPLOSION HAZARDFailure to follow this warning could result in personal injury,death, and/or property damage.Never purge a gas line into a combustion chamber. Nevertest for gas leaks with an open flame. Use a commerciallyavailable soap solution made specifically for the detection ofleaks to check all connections. A fire or explosion may resultcausing property damage, personal injury or loss of life.14. Check for gas leaks with a soap and water solution.15. Turn gas on at electric switch on gas valve and atexternal shut-off or meterFigure 11 Igniter Position − Side ViewL12F0412ïin.2.5 mm3/8ïin.3/16ïin.+0.8ï1.5 mm50 mm9.6 mm4.6 mm1/10ïin.+ 1/32ï 1/16ïin.16. Turn power on at external disconnect, fuse or circuitbreaker.17. Run the furnace through two complete heating cycles tocheck for proper operation18. Install outer door when complete.Servicing Hot Surface IgniterThe igniter does NOT require annual inspection. Check igniterresistance before removal. Refer to Figure 9, Figure 10 andFigure 11.1. Turn off gas and electrical supplies to furnace.2. Remove control door.3. Disconnect igniter wire connection.4. Check igniter resistance. Igniter resistance is affected bytemperature. Only check resistance when the igniter is atroom temperature.a. Using an ohm meter, check resistance across bothigniter leads in connector.b. Cold reading should be between 40 ohms and 70 ohms.Resistance reading will increase as igniter temperatureincreases.5. Remove igniter assembly.a. Using a 1/4−in. driver, remove the two screws securingthe igniter mounting bracket to the burner assembly.(See Figure 9)b. Carefully withdraw the igniter and bracket assemblythrough the front of the burner assembly without strikingthe igniter on surrounding parts.c. Inspect igniter for signs of damage or failure.d. If replacement is required, remove the screw thatsecures the igniter on igniter bracket and remove theigniter.6. To replace igniter and bracket assembly, reverse items5a through 5e.7. Reconnect igniter harness to the igniter, dressing theigniter wires to ensure there is no tension on the igniteritself. (See Figure 9)