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PSC Inducer Motor Assembly Kit Cancels: IIK 398A-40-38 IIK 398A-40-39 8-15-93 Installation Instructions Part No. 309868-754 NOTE: Read the entire instruction manual before starting the installation. INTRODUCTION This instruction covers installation of the PSC (Permanent Split Capacitor) inducer motor kit Part No. 309868-754 on model 398A, 399A, 58DX, 58DXA, 58DXC, 58SX, 58SXA, and 58SXC Condensing Gas Furnaces.
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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 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 a fire extinguisher available. 4. Disconnect motor lead connector from furnace wire harness. 5. Remove screw securing motor ground wire and inducer control box ground wire (when used). The ground screw may be located on blower shelf or on top mounting bracket of inducer assembly. 6. Remove screws securing left mounting bracket to collector box and plastic inducer housing. 7. Remove screws securing top mounting bracket to coupling box. 8. Remove screws securing plastic cover plate to inducer housing. Retain top mounting bracket. 9. Remove motor assembly from inducer housing. 10. Remove and discard old cover plate gasket located in groove on inducer housing. Step 2–Install New Motor Assembly 1. Install new cover plate gasket in groove on inducer housing. 2. Position new motor assembly on inducer housing. Ensure gasket is properly seated. 3. Using wide-pitch threaded screws (provided in kit), secure cover plate to housing. Leave top hole vacant. 4. Install left mounting bracket on inducer housing with 2 wide-pitch threaded screws. 5. Install top mounting bracket (wide end against cover plate) with 1 wide-pitch threaded screw on top of inducer housing. Secure ground wire(s) with this screw if previous motor was grounded in this manner. Otherwise, ground motor to blower shelf. 6. Secure top mounting bracket to coupling box using 1 stainless steel screw (provided in kit). 7. Secure left mounting bracket to collector box using 2 widepitch stainless steel screws (provided in kit). 8. Connect motor lead connector. a. This kit contains a PSC motor and capacitor. Locate capacitor in a convenient place using screw to attach securely. b. Select appropriate wire adapter and connect motor leads to inducer control or furnace wire harness. 9. Reconnect drain tube to collector box. 10. Turn gas and electrical supplies to unit on.