From inside (document excerpt):
Hot Surface Ignitor Bracket Kit Cancels: New IIK 373L-35-13 7-1-92 Installation Instructions Part No. 320030-751 NOTE: Read the entire instruction manual before starting the installation. INTRODUCTION This instruction covers the installation of the hot surface ignitor bracket kit in models 373LAV, 376CAV, 383KAV, 395CAV, 58DHC, 58PAV, 58RAV, and 58SSC Gas Furnaces. SAFETY CONSIDERATIONS Installing and servicing heating equipment can be hazardous due to gas and electrical components.
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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 and on tags and labels attached to the unit. Follow all safety codes. Wear safety glasses and work gloves. Have a fire extinguisher available. DESCRIPTION AND USAGE The hot surface ignitor bracket kit is used to move the hot surface ignitor out of the burner flame to the burner carryover for improved ignitor life and ignition characteristics. The ignitor bracket kit contains the following items: Ignitor Bracket (Part No. 318969-301) Ignitor Bracket (Part No. 318994-301) Screw (8 x 1/2-in.) Screw (8 x 3/4-in.) Installation Instruction Step 1–Installation Remove existing ignitor/bracket assembly. 1. Set room thermostat to OFF position and allow system to complete any cycle. 2. Turn OFF gas and electrical supplies to unit. 3. Remove control access door. (1) (1) (1) (1) (1) 4. Disconnect hot surface ignitor from unit wire harness at the 2-pin Molex connector. 5. Before removing ignitor/bracket assembly, determine which burner support/ignitor bracket combination is on your unit from Fig. 1, 2, or 3. 6. Remove screw attaching ignitor bracket to burner support and remove assembly from unit. Be careful not to damage ignitor.