Carrier Owners Manual - Enlarge page 1 of 2
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From inside (document excerpt):
Downflow Gasket Kit Cancels: AR1100007 IIK 399A-40-7 3-1-92 Installation Instructions Part No. 318051-751, through -753 NOTE: Read the entire instruction before starting the installation. INTRODUCTION This instruction covers the identification and installation location of gaskets included in the Gasket Kit. (See Fig. 1.) The Gasket Kit is designed to provide replacement gaskets for the downflow gas-fired condensing furnaces.
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SAFETY CONSIDERATIONS Installation and service 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, and on tags and labels attached to the unit. Follow all safety codes. Wear safety glasses and work gloves. Have a fire extinguisher available. BURNER ENCLOSURE FRONT GASKET–The burner enclosure front gasket is a 3-piece gasket located in the burner enclosure front on the left and right sides and the bottom. FLANGE COLLAR GASKET–Located between the combustion-air inlet flange collar and the top of the burner enclosure. CONDENSING CELL PANEL GASKET–Located between the top flange of the condensing heat exchanger and the blower shelf extension. TRANSFER TUBE OUTLET GASKET–Located between transfer tube flange and condensing cell panel. TRANSFER TUBE INLET GASKET –Located between transfer tube flange and primary cell panel. COVER PLATE GASKET (FOR PLASTIC INDUCER HOUSING)–Located between the inducer motor cover plate and inducer housing. INDUCER HOUSING SEAL (FOR PLASTIC INDUCER HOUSING)–To construct a new seal between the plastic inducer housing and the collector box, proceed as follows: 1. Carefully remove all old sealant from back of inducer housing and outlet of collector box. 2. Apply sealant releasing agent (Pam cooking spray or equivalent) to area surrounding outlet of collector box.