Carrier N8MXL, Installation Instructions Manual

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441 01 1422 00 5/31/2018
INSTALLATION INSTRUCTIONS
80% Single Stage, ECM Motor
Category I, Gas Furnace
N8MXL
SAFETY CONSIDERATIONS 2 . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CODES AND STANDARDS 5 . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL INSTALLATION 5 . . . . . . . . . . . . . . . . . . . . .
COMBUSTION AND VENTILATION AIR 5 . . . . . . . . . .
DUCT SYSTEMS 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GAS PIPING AND GAS PIPE PRESSURE TESTING 5 . .
ELECTRICAL CONNECTIONS 5 . . . . . . . . . . . . . . . . . .
VENTING 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTROSTATIC DISCHARGE PRECAUTIONS
PROCEDURE 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LOCATION 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LOCATION RELATIVE TO COOLING EQUIPMENT 8 . . . .
AIR FOR COMBUSTION AND VENTILATION 8 . . . . . . . .
OUTDOOR COMBUSTION AIR METHOD 8 . . . . . . . . .
COMBINATION OF INDOOR AND OUTDOOR AIR 10 .
INSTALLATION 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UPFLOW INSTALLATION 10 . . . . . . . . . . . . . . . . . . . . . .
BOTTOM RETURN AIR INLET 10 . . . . . . . . . . . . . . . . . .
SIDE RETURN AIR INLET 10 . . . . . . . . . . . . . . . . . . . . . .
LEVELING LEGS (IF DESIRED) 10 . . . . . . . . . . . . . . . . .
DOWNFLOW INSTALLATION 11 . . . . . . . . . . . . . . . . . . .
BOTTOM RETURN AIR INLET 11 . . . . . . . . . . . . . . . . . .
OPENING DIMENSIONS − IN. (MM) 12 . . . . . . . . . . . . . .
HORIZONTAL INSTALLATION 13 . . . . . . . . . . . . . . . . . .
SUSPENDED FURNACE SUPPORT 13 . . . . . . . . . . . . . . .
PLATFORM FURNACE SUPPORT 13 . . . . . . . . . . . . . . . .
ROLL − OUT PROTECTION 13 . . . . . . . . . . . . . . . . . . . . . .
BOTTOM RETURN AIR INLET 13 . . . . . . . . . . . . . . . . . .
SIDE RETURN AIR INLET 13 . . . . . . . . . . . . . . . . . . . . . .
FILTER ARRANGEMENT 13 . . . . . . . . . . . . . . . . . . . . . . .
AIR DUCTS 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL REQUIREMENTS 13 . . . . . . . . . . . . . . . . . . . .
DUCTWORK ACOUSTICAL TREATMENT 13 . . . . . . . .
SUPPLY AIR CONNECTIONS 13 . . . . . . . . . . . . . . . . . . . .
RETURN AIR CONNECTIONS 16 . . . . . . . . . . . . . . . . . . .
GAS PIPING 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL CONNECTIONS 20 . . . . . . . . . . . . . . . . . .
115 − V WIRING 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J − BOX RELOCATION 21 . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL CONNECTION TO J − BOX 21 . . . . . . . . . .
BX CABLE INSTALLATION IN FURNACE J − BOX 21 . .
24 − V WIRING 21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ACCESSORIES 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VENTING 24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL VENTING REQUIREMENTS 24 . . . . . . . . . . .
MASONRY CHIMNEY REQUIREMENTS 24 . . . . . . . . . .
APPLIANCE APPLICATION REQUIREMENTS 25 . . . . .
ADDITIONAL VENTING REQUIREMENTS 27 . . . . . . . .
SIDEWALL VENTING 27 . . . . . . . . . . . . . . . . . . . . . . . . . .
START − UP, ADJUSTMENT, AND SAFETY CHECK 31 . . . . .
GENERAL 31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START − UP PROCEDURES 31 . . . . . . . . . . . . . . . . . . . . . .
ADJUSTMENTS 31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHECK SAFETY CONTROLS 33 . . . . . . . . . . . . . . . . . . .
CHECKLIST 34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SERVICE AND MAINTENANCE PROCEDURES 40 . . .
INTRODUCTION 40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL 40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL CONTROLS AND WIRING 40 . . . . . . . . .
CARE AND MAINTENANCE 41 . . . . . . . . . . . . . . . . . . . .
CLEANING AND/OR REPLACING AIR FILTER 42 . . . .
BLOWER MOTOR AND WHEEL 42 . . . . . . . . . . . . . . . . .
CLEANING HEAT EXCHANGER 43 . . . . . . . . . . . . . . . . .
SEQUENCE OF OPERATION 44 . . . . . . . . . . . . . . . . . . . .
WIRING DIAGRAMS 45 . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING 45 . . . . . . . . . . . . . . . . . . . . . . . . . .
PARTS REPLACEMENT INFORMATION GUIDE 49 . . . .
Use of the AHRI Certified
TM
Mark indicates a
manufacturer’s participation in the program. For
verification of certification for individual products,
go to www.ahridirectory.org.
NOTE : Read the entire instruction manual before starting the
installation.
Portions of the text and tables are reprinted from current edition
of NFPA 54/ANSI Z223.1 E , with permission of National Fire
Protection Association, Quincy, MA 02269 and American Gas
Association, Washington DC 20001. This reprinted material is
not the complete and official position of the NFPA or ANSI on
the referenced subject, which is represented only by the standard
in its entirety.