ICP G9MVE0401410A2 Service And Technical Support Manual

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ICP G9MVE0401410A2 Service And Technical Support Manual Manual pdf 23 page image

SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace: (F/G)9MVESpecifications subject to change without notice.440 04 4801 00 235. Remove igniter assembly.a. Using a 1/4−in. driver, remove the two screwssecuring the igniter mounting bracket to the burnerassembly. (See Figure 10)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 10)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)5. Attach a funnel with a flexible tube to port on the collectorbox.6. Flush inside of collector box with water until dischargewater from condensate trap is clean and runs freely.7. Repeat steps 4 thru 6 with middle plug on upper cornerof collector box.8. Remove the pressure switch tube from the collector box.NOTE: Do NOT blow into tube with tube connected to thepressure switch.9. Clean pressure switch port on collect box with a smallwire. Shake any water out of pressure switch tube.10. Reconnect tube to pressure switch and pressure switchport.11. Remove the relief tube from the port on the collector boxand the trap.12. Clean the relief port on collect box and the trap with asmall wire. Shake any water out of the tube.13. Reconnect relief tube to trap and collector box ports.Cleaning Condensate Drain and TrapNOTE: If the condensate trap is removed, a new gasketbetween the trap and collector box is required. Verify acondensate trap gasket is included in the service kit or obtainone from your local distributor.1. Disconnect power at external disconnect, fuse or circuitbreaker.2. Turn off gas at external shut-off or gas meter.3. Remove control door and set aside.4. Turn electric switch on gas valve to OFF.5. Disconnect external drain from condensate drain elbowor drain extension pipe inside the furnace and set aside.6. Disconnect the condensate trap relief hose from collectorbox port and condensate trap.NOTE: If condensate has a heat pad attached to the trap,trace the wires for the pad back to the connection point anddisconnect the wires for the heat pad.7. Remove the screw that secures the condensate trap tothe collector box, remove the trap and set aside.8. Remove the trap gasket from the collector box if it did notcome off when the trap was removed.9. Discard the old trap gasket.10. Rinse condensate trap in warm water until trap is clean.11. Flush condensate drain lines with warm water.Remember to check and clean the relief port on thecollector box.12. Shake trap dry.13. Clean port on collector box with a small wire.To re-install Condensate Drain and Trap:1. Remove adhesive backing from condensate trap gasket2. Install gasket on collector box3. Align the condensate trap with the drain opening on thecollector box and secure the trap with the screw4. Attach the relief hose to the relief port on the condensatetrap and collector box.5. Secure tubing to prevent any sags or traps in the tubing.6. Connect condensate drain elbow or drain extensionelbow to the condensate trap7. Connect the leads of the condensate heat pad (if used)8. Connect external drain piping to the condensate drainelbow or drain extension pipe.9. Turn gas on at electric switch on gas valve and atexternal shut-off or meter10. Turn power on at external disconnect, fuse or circuitbreaker.11. Run the furnace through two complete heating cycles tocheck for proper operation12. Install control door when complete.Checking Heat Pad Operation (If Applicable)In applications where the ambient temperature around thefurnace is 32F (0C) or lower, freeze protection measures arerequired. If this application is where heat tape has beenapplied, check to ensure it will operate when low temperaturesare present.NOTE: The Heat Pad, when used, should be wrapped aroundthe condensate drain trap. There is no need to use heat tapewithin the furnace casing. Most heat tapes are temperatureactivated, and it is not practical to verify the actual heating ofthe tape. Check the following:1. Check for signs of physical damage to heat tape such asnicks, cuts, abrasions, gnawing by animals, etc.2. Check for discolored heat tape insulation. If any damageor discolored insulation is evident, replace heat tape.3. Check that heat tape power supply circuit is on.