Carrier 58MCA 6SM Gas Furnace Owners Manual

58MCA 4-Way Multipoise Fixed-Capacity Direct-Vent Condensing Gas Furnace Visit www.carrier.com Service and Maintenance Instructions For Sizes 040–140, Series 140 ® ama A93040 CANADIAN GAS ASSOCIATION A PP R O VED R NOTE: Read the entire instruction manual before performing any service or maintenance. This symbol indicates a change since the last issue. Index Page As an ENERGY STAR® Partner, Carrier Corporation has determined that this product meets the ENERGY STAR® guidelines for energy efficiency.

SAFETY CONSIDERATIONS 1-2 ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS 2 GENERAL 2 CARE AND MAINTENANCE 2-11 Cleaning and/or Replacing Air Filter .3 Blower Motor and Wheel Maintenance 3-4 Cleaning Burners .4-5 Cleaning Heat Exchangers 5-7 Primary Heat Exchangers 5-7 Secondary Heat Exchangers 7 Flushing Collector Box and Drainage System 7 Servicing Hot Surface Ignitor .7-8 Electrical Controls and Wiring .8 Troubleshooting 8-9-10 Checking Heat Tape Operation (If Applicable) 10 Winterizing 10-11 WIRING DIAGRAM .12 SERVICE LABEL .13 TROUBLESHOOTING GUIDE 14-15 SAFETY CONSIDERATIONS Installing and servicing heating equipment can be hazardous due to gas and electrical components. Only trained and qualified personnel should install, repair, or service heating equipment. Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters. All other operations must be performed by trained service personnel. When working on heating equipment, observe precautions in the literature, on tags, and on labels attached to or shipped with the unit and other safety precautions that may apply. all safety codes. In the United States, follow all safety codes including the National Fuel Gas Code (NFGC) NFPA 54-1996/ANSI Z223.1-1996 and the Installation Standards, Warm A98306 REGISTERED QUALITY SYSTEM Fig. 1–Multipoise Furnace in Upflow Orientation Air Heating and Air Conditioning Systems (NFPA 90B) ANSI/NFPA 90B. In Canada refer to the current edition of the CAN/CGA-B149.1- and .2-M95 National Standard of Canada, Natural Gas and Propane Installation Codes (NSCNGPIC). Wear safety glasses and work gloves. Have fire extinguisher available during start-up and adjustment procedures and service calls. 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 hazards 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 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 PC 101 Catalog No. 535-742 Printed in U.S.A. Form 58MCA-6SM Pg 1 5-99 Replaces: 58MCA-5SM Tab 6a 8a