Carrier Owners Manual - 1 of 2
Carrier Owners Manual - 2 of 2
From inside (document excerpt):
PSC Inducer Motor Housing Assembly Kit Cancels: IIK 340M-40-3 IIK 340M-40-13 9-95 Installation Instructions Part No. 320725-753 COMBUSTION-AIR INTAKE CONNECTION GAS VALVE 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 NOTE: Read the entire instruction manual before starting the installation.
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This symbol indicates a change since the last issue. SAFETY CONSIDERATIONS Installing and serving 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 coils or 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 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. 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 A93454 Fig. 1 Inducer Motor Assembly in Upflow Furnace Orientation INSTALLATION Step 1–Remove Old Motor Assembly 1. Turn electrical supply to unit to OFF position. 2. Remove main furnace door. 3. Remove drain tube from inducer motor mounting cover plate. Before beginning any installation or modification, be sure the main electrical disconnect switch is in the OFF position. Electrical shock can cause personal injury or death. INTRODUCTION 4. Remove pressure switch tubes. (See Fig. 1.) a. Remove tube attached to pressure switch from collector box. b. Remove tube attached to pressure switch from burner enclosure and gas valve. 5. Remove screw securing pressure switch and capacitor to inducer housing. 6. Disconnect motor lead connector from control center. 7. Remove 4 bolts attaching inducer housing assembly to heat exchanger cell panel. Step 2–Install New Motor Assembly 1. Inspect seal on collector box. (See Fig. 2.) NOTE: If collector box seal is damaged in any way, it must be repaired. To repair, apply sealant releasing agent such as PAM cooking spray or equivalent (must not contain corn or canola oil, aromatic or halogenated hydrocarbons) to inducer housing. Apply a small bead of GE RTV 162 or Dow-Corning RTV 738 sealant to groove in collector box. 2. Remove 4 bolts and spacers from old inducer housing assembly. This instruction covers installation of the permanent split capacitor (PSC) inducer motor kit Part No. 320725-753 on models 340MAV, 350MAV, 490AAV, 58MCA, and 58MXA Condensing Gas Furnaces. DESCRIPTION AND USAGE Use this PSC inducer motor kit to replace a failed inducer motor assembly.