Carrier Owners Manual - 1 of 2
Carrier Owners Manual - 2 of 2
From inside (document excerpt):
Primary Coupling Box Kit Cancels: AR1100004A IIK 321A-60-1 7-15-92 Installation Instructions Part No. 310842-751, -752, and -753 NOTE: Read the entire instruction manual before starting the installation. INTRODUCTION This instruction manual covers the installation of primary (lower) coupling box assembly kit Part No. 310842-751, 752, and 753 in a deluxe downflow condensing furnace. See Table 1 for usage.
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NOTE: Obtain releasing agent (PAM or equivalent) and RTV sealant (G.E. 122, 162, or Dow-Corning 738) before starting installation. 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 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 primary coupling box assembly kit can be utilized to restore a unit when the coupling box has been damaged or has failed. The primary coupling box kit contains the following items: Primary coupling box assembly Installation Instructions Step 1–Removal of Primary Coupling Box 1. Turn OFF gas and electrical supplies to furnace. 2. Remove blower and control access doors. 3. Loosen hose clamps at condensate drain trap and bottom of inducer housing and remove 5/8-in. drain tube. 4. Loosen hose clamps at condensate drain trap and collector box and remove 7/8-in. formed drain tube. 5. Remove screws securing coupling box to cell panel. Do not remove screws through insulation. 6. Using a blade screwdriver, break seal between bottom flange of coupling box and cell panel. 7. Remove coupling box assembly from furnace. Step 2–Installation of New Coupling Box 1. Clean old sealant from cell panel. 2. Apply sealant releasing agent (Pam) to flange surface of new coupling box where sealant is to be applied. (See Fig 1.) 3. After applying releasing agent (Pam) apply generous bead of G.E. RTV 122, 162, or Dow-corning RTV 738 sealant to coupling box flange over releasing agent. A87318