Carrier Deluxe 58MVB Service And Maintenance Instructions

Also see for 120 Series: Installation, start-up, and operating instructions Installation, start-up, operating and service and maintenance instructions Manual Operating instructions

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Carrier Deluxe 58MVB Service And Maintenance Instructions Manual pdf 6 page image

615. Reinsert the igniter wires in the slot in the manifold grom-met, dressing the wires to ensure there is no tension on theigniter itself. (See Fig. 7.)ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personalinjury or death.Igniter wires must be securely placed in slot in manifoldgrommet or else they could become pinched or severedand electrically shorted.! WARNING16. Reconnect wires to gas valve and igniter. Refer to furnacewiring diagram for proper wire location.17. Reinstall burner box pressure tube to gas valve regulatorfitting.18. Reinstall gas supply pipe to furnace gas control valve us-ing backup wrench on gas valve to prevent rotation andimproper orientation.NOTE: Use propane gas resistant pipe dope to prevent gas leaks.DO NOT use Teflon tape.FIRE, EXPLOSION, UNIT DAMAGE HAZARDFailure to follow this warning could result in personalinjury, death, or property damage.Gas valve switch MUST be facing forward or tiltedslightly.! WARNING19. Replace burner box cover.20. Turn on gas and electrical supplies to furnace.21. Check for gas leaks.FIRE OR EXPLOSION HAZARDFailure to follow this warning could result in personalinjury, death or property damage.Never test for gas leaks with an open flame. Use acommercially available soap solution made specificallyfor the detection of leaks to check all connections.! WARNING22. Replace main furnace door.Step 4—Cleaning Heat ExchangersThe following items should be performed by a qualified servicetechnician.PRIMARY HEAT EXCHANGERSIf the heat exchangers get an accumulation of light dirt or dust onthe inside, they may be cleaned by the following procedure:NOTE: If the heat exchangers get a heavy accumulation of sootand carbon, both the primary and secondary heat exchangersshould be replaced rather than trying to clean them thoroughlydue to their intricate design. A build--up of soot and carbonindicates that a problem exists which needs to be corrected, suchas improper adjustment of manifold pressure, insufficient or poorquality combustion air, improper vent termination, incorrect sizeor damaged manifold orifice(s), improper gas, or a restricted heatexchanger (primary or secondary). Action must be taken tocorrect the problem.1. Turn off gas and electrical supplies to furnace.2. Remove main furnace door.UNIT DAMAGE HAZARDFailure to follow this caution may result in furnacecomponent damage.Label all wires prior to disconnection when servicingcontrols. Wiring errors can cause improper and hazardousoperation.CAUTION!3. Disconnect wires or connectors to flame rollout switch,gas valve, igniter, and flame sensor.4. Disconnect combustion--air intake pipe from intake hous-ing.5. Remove the pressure switch tube from intake housing.6. Remove screws attaching intake housing to burner box,and rotate intake housing away from burner box for re-moval.7. Using backup wrench, disconnect gas supply pipe fromfurnace gas control valve.8. Disconnect pressure tubing from gas valve.9. Remove 2 screws attaching top filler panel and rotate up-wards to gain access to screws attaching burner box to cellpanel.10. Remove screws attaching burner box to cell panel. (SeeFig. 6.)NOTE: Burner box, cover, manifold, gas valve, and burnerassembly should be removed as 1 assembly.11. Clean heat exchanger openings with a vacuum and a softbrush. (See Fig. 8.)NOTE: After cleaning, inspect the heat exchangers to ensurethey are free of all foreign objects that may restrict flow ofcombustion products.12. Reverse items 4 through 10 for reassembly.PRIMARY HXINLET OPENINGSA96305Fig. 8 --- Cleaning Inlet Openings of PrimaryHeat Exchangers58MVB