ICP F9MXT0401410A Service And Technical Support Manual

Contents

ICP F9MXT0401410A Service And Technical Support Manual Manual pdf 18 page image

SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: (F/G)9MXTSpecifications subject to change without notice.18 440 04 4321 046. Attach the green/yellow wire and ground terminal to oneof the manifold mounting screws.7. Install the remaining manifold mounting screws.8. Check the igniter alignment. See Figure 9, Figure 10and Figure 11.Figure 10 Igniter Position − Top ViewA114052-1/2-in.(64.4)1-1/4-in.(31.8)Figure 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.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 sensor.12. 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.FIRE OR EXPLOSION HAZARDFailure to follow this warning could result in personalinjury, death, and/or property damage.Never purge a gas line into a combustion chamber.Never test for gas leaks with an open flame. Use acommercially available soap solution madespecifically for the detection of leaks to check allconnections. A fire or explosion may result causingproperty damage, personal injury or loss of life.! WARNING14. Check for gas leaks with a commercially available soapsolution made specifically for the detection of leaks.15. Turn gas on at electric switch on gas valve and atexternal shut-off or meter16. Turn power on at external disconnect, fuse or circuitbreaker.17. Run the furnace through two complete heating cycles tocheck for proper operation18. Install control 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 70ohms.5. Remove igniter assembly.a. Using a 1/4−in. driver, remove the two screwssecuring the igniter mounting bracket to the burnerassembly (See Figure 9)b. Carefully withdraw the igniter and bracket assemblythrough the front of the burner assembly withoutstriking the 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 5d.7. Reconnect igniter harness to the igniter, dressing theigniter wires to ensure there is no tension on the igniteritself. (See Figure 9)8. Turn on gas and electrical supplies to furnace.9. Verify igniter operation by initiating control board self−testfeature or by cycling thermostat.10. Replace control door.Flushing Collector Box and Drainage SystemELECTRICAL SHOCK AND FIRE HAZARDFailure to follow this warning could result in personalinjury, death, and/or property damage.Turn off the gas and electrical supplies to the furnaceand install lockout tag before performing anymaintenance or service. Follow the operatinginstructions on the label attached to the furnace.! WARNING1. Turn off gas and electrical supplies to furnace.2. Remove control door.3. Disconnect pressure switch tube from pressure switchport.NOTE: Ensure the pressure switch tube disconnected from thepressure switch is higher than the collector box opening orwater will flow out of tube.4. Remove the collector box plug from the top port on theupper corner of the collector box. (See Figure 1)