Carrier Owners Manual - Enlarge page 1 of 4
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From inside (document excerpt):
Collector Box Replacement Kit Cancels: New IIK 330A-40-5 6-98 Installation Instructions Part No. 310215-751 through 310215-797 NOTE: Read the entire instruction manual before starting the 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, on tags, and on labels attached to the unit. Recognize safety information. This is the safety-alert symbol. When you see this symbol on the unit 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. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation. Follow all safety codes. Wear safety glasses and work gloves. Have a fire extinguisher available. INTRODUCTION This instruction covers the collector box installation on all hot surface ignitor units. The collector box should be replaced anytime there is damage to the pressure switch pressure tap, when corrosion has created visible surface damage to the box, or anytime functionality of the collector box has been compromised. There are currently 5 different primary sizes of collector boxes, each having about 6 different sizes of flue restriction. Total there are about 30 different combinations of collector boxes. NOTE: It is very important that you verify that the collector box you are installing be the same size as you are removing. Always verify the flue restrictor HOLE SIZE before installing a collector box. DESCRIPTION AND USAGE The collector box replacement kit can be utilized to restore units having collector boxes that require repair. Vent connector may be hot to the touch. Failure to follow this warning could result in personal injury. NOTE: It may be necessary to completely remove the flue extension cover from downflow/horizontal furnaces. 5. Unplug inducer motor wires, draft safeguard switch wiring, and pressures switch wiring. 6. Remove screws from top corners of furnace casing (upflow furnaces only). 7. Disconnect pressure switch tube from collector box. 8. Remove 3 screws securing inducer assembly (motor, wheel, and mount) to inducer housing and remove inducer motor assembly. This kit contains the following items: Collector box Gasket Screw (shallow head Phillips) Installation Instructions INSTALLATION NOTE: A releasing agent such as PAM cooking spray or equivalent (must not contain corn or canola oil, aromatic or halogenated hydrocarbons or inadequate seal may occur) and RTV sealant (G.E. 162, G.E. 6702, or Dow-Corning 738) are needed before starting installation. DO NOT substitute any other type of RTV sealant. G.E. 162 (P771-9003) is available through RCD in 3-oz tubes. Step 1–Remove the Collector box 1. Turn off electric supplies to unit and thermostat. More than 1 disconnect may be required to disconnect power to unit. 2. Remove blower and control access doors. 3. Turn off gas at external supply shutoff or turn gas control knob to off. On models with an electric switch gas control, set switch to off.