Carrier 58M 12SI Gas Furnace Owners Manual

Primary Cell Kit Cancels: New IIK 350M-35-8 9-1-93 Installation Instructions Part No. 320723-751 NOTE: Read the entire instruction manual before starting the installation. INTRODUCTION This instruction covers installation of the primary cell kit Part No. 320723-751 in multipoise, 40-in. tall, condensing gas furnaces. NOTE: A releasing agent (Pam cooking spray) and RTV sealant (G.E. 162 or Dow-Corning 738) are needed before starting installation.

DO NOT substitute any other type of RTV sealant. SAFETY CONSIDERATIONS Installing and servicing of heating equipment can be hazardous due to gas and electrical components. Only trained personnel should install or service heating equipment. Untrained personnel can perform basic maintenance functions such as cleaning and replacing filters. All other operations should be performed by trained service personnel. When working on heating equipment, observe precautions in the literature, on tags, and on labels attached to the unit. Follow all safety codes. Wear safety glasses and work gloves. Have a fire extinguisher available. 7. Disconnect combustion-air intake pipe from intake housing and move pipe out of furnace casing. 8. Disconnect gas supply pipe from gas valve using backup wrench. 9. Disconnect vent pipe from inducer housing by loosening clamp and move pipe out of furnace casing. 10. Disconnect drain tubes and relief port tube from condensate trap. 11. Remove motor leads, transformer wires, door switch wires, and auxiliary limit switch wires (if present) from control center and pull wires through blower shelf. 12. Remove 2 screws securing blower to blower shelf. 13. Remove 2 screws adjacent to blower mounting screws that secure blower shelf to cell panel. 14. Remove 3 screws from each side of cell panel. 15. Remove control center by removing screw and pressing tabs inward. 16. Secure control center and J-box to manifold for removal purposes only. 17. Remove whole cell panel assembly with heat exchanger, burner box, inducer assembly, J-box, and control center attached through front of furnace. Turn off gas and electrical supplies to unit before beginning any installation or modification. Follow operating instructions on label attached to furnace. Failure to follow this warning could result in personal injury or death. DESCRIPTION AND USAGE Use this primary cell kit when replacement of a factory-installed primary cell(s) are required. This primary cell kit contains the following items: Primary cell Cell inlet opening gasket Cell outlet opening gasket Screws (No. 8D X 3/8-in. LG) Installation Instructions INSTALLATION Step 1–Remove Whole Cell Panel Assembly See Fig. 1 for furnace component location. See Fig. 2 for an exploded view of heat system components. 1. Turn gas and electrical supplies to furnace off. 2. Remove furnace door. 3. Remove blower access panel. 4. Disconnect field power supply wires from J-box. 5. Remove 2 screws securing J-box. 6. Remove 2 screws securing top filler panel and rotate panel upwards to remove or allow the heat exchanger to be removed from front of furnace. 9 1 Whole cell panel assembly is heavy. Get help to remove and lift assembly. Failure to follow this caution could result in personal injury. Step 2– Remove Burner Box Assembly 1. Disconnect wires or connectors to overtemperature switch, gas valve, ignitor, and flame sensor. 2. Remove pressure switch tube from intake housing. 3. Remove 2 screws attaching intake housing to burner box, and rotate intake housing away from burner box for removal. 4. Disconnect pressure tubing from gas valve. 5. Remove screws attaching burner box to cell panel. NOTE: Burner box cover, manifold, gas valve, and burner assembly should be removed as 1 assembly. Step 3–Remove Coupling Box 1. Remove screws securing coupling box to primary cell outlet panel and condensing heat exchanger. 2. Break seal between top flange of coupling box and cell panel using screwdriver blade. 3. Remove coupling box. Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 PC 101 Catalog No. 535-884 Printed in U.S.A. Form 58M-12SI Pg 1 9-93 Replaces: New Tab 6a 8a COMBUSTION-AIR INTAKE CONNECTION GAS VALVE AUXILIARY JUNCTION BOX VENT OUTLET CONDENSING HEAT EXCHANGER (BEHIND CELL INLET PANEL) PRESSURE SWITCH INDUCER MOTOR CONDENSATE TRAP MOTOR AND BLOWER ASSEMBLY AIR FILTER AND RETAINER BURNER ENCLOSURE PRIMARY HEAT EXCHANGER (BEHIND CELL INLET PANEL) CAP AND CLAMP (UNUSED DRAIN CONNECTION) VENT OUTLET CONTROL CENTER BLOWER ACCESS PANEL SAFETY INTERLOCK SWITCH A93454 Fig. 1–Furnace Component Location in Upflow Orientation PRIMARY CELL INLET PANEL MAIN LIMIT SHIELD MAIN LIMIT BURNER ENCLOSURE GASKET PRIMARY CELL COLD SPOT BAFFLE COUPLING BOX T-TABS CONDENSING HEAT EXCHANGER ASSEMBLY PRIMARY CELL OUTLET PANEL BLOWER SHELF PRESSURE SWITCH BURNER ENCLOSURE AND GAS VALVE INDUCER MOTOR A93431 Fig. 2–Exploded View of Heat System Components in Upflow Orientation 2 Step 4–Install Primary Cell