Carrier 58MCB Service And Maintenance Instructions

Also see for 58MCB: User's information manual Owner's manual Service and maintenance instruction Nstallation, start-up, and operating instructions Installation, start-up, and operating instructions

Contents

Carrier 58MCB Service And Maintenance Instructions Manual pdf 6 page image

6MANIFOLDMOUNTINGSCREWSMANIFOLDGAS VALVEREGULATORFITTINGGASCONTROLVALVECELLPANELGASKETA02312Fig. 6 -- Burner Box AssemblyStep 3 — Cleaning BurnersThe following items should be performed by a qualified servicetechnician. If the burners develop an accumulation of light dirt ordust, they may be cleaned by using the following procedure:1. Turn off gas and electrical supplies to furnace.2. Remove main furnace door.3. Remove burner box cover.4. Using backup wrench, disconnect gas supply pipe from fur-nace gas control valve.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 dangerousoperation.CAUTION!5. Remove wires from gas valve. Note location for reassembly.6. Remove burner box pressure tube from gas valve regulatorfitting.7. Unplug igniter from harness.8. Remove igniter leads from slot in manifold grommet.9. Remove screws that secure manifold to burner box. (SeeFig. 6.)NOTE: Do not remove burner box from cell panel.10. Remove manifold, orifices, and gas valve as one assembly.11. Remove screws attaching burner assembly in burner box.NOTE: Use care when removing and reinstalling burners not tostrike the hot surface igniter.IGNITER WIRES MUSTBE PLACED IN THIS SLOTA05074Fig. 7 -- Igniter Wire Placement12. Remove burner assembly from burner box.NOTE: All burners are attached to burner bracket and can beremoved as one assembly.13. Clean burners with soft brush and vacuum.14. Reinstall manifold, orifice, and gas valve assembly in burn-er box. Ensure manifold seal grommet is installed properlyand burners fit over orifices.15. 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 regulator fit-ting.18. Reinstall gas supply pipe to furnace gas control valve usingbackup wrench on gas valve to prevent rotation and im-proper orientation.NOTE: Use propane gas resistant pipe dope to prevent gas leaks.DO NOT use Teflon tape.58MCB