Carrier 58M 25SI Gas Furnace Owners Manual

Condensing Heat Exchanger Kit Cancels: IIK 340M-40-1 IIK 340M-40-9 7-95 Installation Instructions Part No. 320722-751, -752, -753, and -754 NOTE: Read the entire instruction manual before starting the installation. This symbol indicates a change since the last issue. SAFETY CONSIDERATIONS Installing and servicing 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. Recognize safety information. This is the safety-alert symbol. When you see this symbol on the furnace and in instructions or manuals, be alert to the potential for personal injury. Understand the signal words DANGER, WARNING, and CAUTION. These words are used with the safety-alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies a hazard which could result in personal injury or death. CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage. 320722-751 KIT PART NO. Table 1–Kit Usage UNIT 340MAV 350MAV 490AAV 024040 036040 024060 036060 048060 036080 048080 060080 048100 060100 060120 355MAV 58MCA 58MXA 040-08 040-12 060-08 060-12 060-16 080-12 080-16 080-20 100-16 100-20 120-20 58MVP 042060 060-14 320722-752 320722-753 320722-754 042080 060080 060100 042040 060120 080-14 080-20 100-20 040-14 120-20 This condensing heat exchanger kit contains the following items: Condensing heat exchanger assembly (includes collector box) Outlet cell panel gasket Outlet cell panel screw Installation Instructions 1 1 7 maximum 1 INSTALLATION Step 1–Remove Whole Cell Panel Assembly See Fig. 1 for furnace component locations. See Fig. 2 for expanded view of heat system components. 1. Turn off gas and electrical supplies to furnace. 2. Remove main furnace door. 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. 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 upwards to remove or allow the heat exchanger to be removed from front of furnace. 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. Move pipe out of furnace casing. 10. Remove motor leads, transformer wires, door switch wires, and auxiliary limit switch wires (if present) from control center and pull wires through blower shelf. 11. Remove 2 screws securing blower to blower shelf. 12. Remove 2 screws next to blower mounting screws securing blower shelf to cell panel. 13. Remove 3 screws from each side of cell panel. INTRODUCTION This instruction covers installation of the condensing heat exchanger kit Part No. 320722-751, -752, -753, and -754 in multipoise, 40-in. tall, condensing gas furnaces. NOTE: A releasing agent such as PAM cooking spray or equivalent (must not contain corn or canola oil, aromatic or halogenated hydrocarbons) and RTV sealant (G.E. 162 or Dow-Corning 738) are required before starting installation. Do not substitute any other type of RTV sealant. DESCRIPTION AND USAGE Use this condensing heat exchanger kit to replace a failed, factory-installed, condensing heat exchanger. 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. 565-916 Printed in U.S.A. Form 58M-25SI Pg 1 7-95 Replaces: 58M-15SI