441 01 3700 00 7/17/2019
INSTALL
TION INSTRUCTIONS
80% AFUE, Single Stage, ECM Motor
Category I, 33--1/3 in. Gas Furnace
N80VSL
Series
SAFETY CONSIDERATIONS 3........................
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
PROCEDURE 4.....................................
INTRODUCTION 5..................................
CODES AND STANDARDS 5..........................
Safety............................................
General Installation 5................................
Combustion and Ventilation Air 5......................
Duct Systems 5.....................................
Acoustical Lining and Fibrous Glass Duct 5...............
Gas Piping and Gas Pipe Pressure Testing 5...............
Electrical Connections 5..............................
Venting 5.........................................
LOCATION 6.......................................
AIR FOR COMBUSTION AND VENTILATION 7.........
Outdoor Combustion Air Method 8....................
The Standard Method: 8............................
Combination of Indoor and Outdoor Air 9..............
INSTALLATION 10..................................
Upflow Installation 10..............................
Leveling Legs (If Desired) 10........................
Downflow/Horizontal Installation 10..................
Suspended Furnace Support 11.......................
Platform Furnace Support 11.........................
Roll--Out Protection 11.............................
Return Air Inlet 11.................................
Filter Arrangement 12..............................
AIR DUCTS 12......................................
GAS PIPING 19.....................................
ELECTRICAL CONNECTION 20.......................
ACCESSORIES 23...................................
VENTING 25.......................................
START--UP, ADJUSTMENT, AND SAFETY CHECK 33.....
Start--Up Procedures 33..............................
Service Label 34....................................
Adjustments 35.....................................
Check Safety Controls 40.............................
Checklist 40.......................................
SERVICE AND MAINTENANCE PROCEDURES 40.......
Wiring Diagram 42..................................
Care and Maintenance 42.............................
Sequence of Operation 45.............................
Troubleshooting 48..................................
PART S REPLACEMENT INFORMATION GUIDE 50.......
NOTE: Read the entire instruction manual before starting the
installation.
Portions of the text and tables are reprinted from NFPA 54/ANSI
Z223.1E, 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.
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