Printed in U.S.A. 440 01 4201 01 Sept. 2011
INSTALLATION INSTRUCTIONS
Modulating, Variable Speed Motor
35” Tall High Efficiency Condensing Gas Furnace
(F/G)9MAC
These instructions must be read and understood completely before attempting installation.
Safety Labeling and Signal Words
DANGER, WARNING, CAUTION, and NOTE
The signal words DANGER, WARNING,
CAUTION, and NOTE are used to identify levels of
hazard seriousness. The signal word DANGER is
only used on product labels to signify an immediate
hazard. The signal words WARNING, CAUTION,
and NOTE will be used on product labels and
throughout this manual and other manual that may
apply to the product.
DANGER − Immediate hazards which will result in
severe personal injury or death.
WARNING − Hazards or unsafe practices which
could result in severe personal injury or death.
CAUTION − Hazards or unsafe practices which
may result in minor personal injury or product or
property damage.
NOTE − Used to highlight suggestions which will
result in enhanced installation, reliability, or
operation.
!
WARNING
Signal Words in Manuals
The signal word CAUTION is used throughout
this manual in the following manner:
!
CAUTION
Signal Words on Product Labeling
Signal words are used in combination with
colors and/or pictures or product labels.
The signal word WARNING is used throughout
this manual in the following manner:
Safety−alert symbol
When you see this symbol on the unit and in
instructions or manuals, be alert to the
potential for personal injury.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS 3......................................
INTRODUCTION 4..............................................
CODES AND STANDARDS 4.......................................
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS PROCEDURE 5..........
DIMENSIONS 6................................................
LOCATION 7..................................................
LOCATION RELATIVE TO COOLING EQUIPMENT 9.......................
AIR FOR COMBUSTION AND VENTILATION 9...........................
CONDENSATE TRAP 10...........................................
INSTALLATION 17...............................................
UPFLOW INSTALLATION 17........................................
DOWNFLOW INSTALLATION 18.....................................
HORIZONTAL INSTALLATION 20.....................................
FILTER ARRANGEMENT 23........................................
AIR DUCTS 25..................................................
GAS PIPING 25.................................................
ELECTRICAL CONNECTIONS 27.....................................
J−BOX INSTALLATION 27.........................................
VENTING 31...................................................
SPECIAL VENTING REQUIREMENTS FOR INSTALLATIONS IN CANADA 31.......
DIRECT VENT / 2−PIPE SYSTEM 32..................................
VENTILATED COMBUSTION AIR SYSTEMS 32...........................
TERMINATION REQUIREMENTS FOR THE
PROVINCES OF ALBERTA AND SASKATCHEWAN 37......................
INSTALLING THE VENT TERMINATION 42..............................
MAXIMUM EQUIVALENT VENT LENTH - FEET (METERS) 46.................
MAXIMUM ALLOWABLE EXPOSED VENT LENGTHS IN UNCONDITIONED SPACE 47
MAXIMUM
LENGTH OF UNINSULATED AND INSULATED VENT PIPE-FT (M) 47....
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 .
INSTALLER: Affix these instructions on or adjacent to the
furnace.
CONSUMER: Retain these instructions for future
reference.
Portions of the text and tables are reprinted from NFPA 54 /ANSI Z223.1−2009©, 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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