Printed in U.S.A. 440 01 4001 05 April 2013
INSTALLATION INSTRUCTIONS
Variable Speed Motor, Two−Stage ECM Motor and Single−Stage
35” Tall, High Efficiency Condensing Gas Furnace
(F/G)9MVT, (F/G)9MXT, (F/G)9MXE
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) 5.....................
DIMENSIONS 6...........................................
LOCATION RELATIVE TO COOLING EQUIPMENT 8...........
AIR FOR COMBUSTION AND VENTILATION 9................
CONDENSATE TRAP 12.....................................
INSTALLATION 19..........................................
UPFLOW INSTALLATION 19.................................
DOWNFLOW INSTALLATION 20..............................
HORIZONTAL INSTALLATION 21.............................
AIR DUCTS 27.............................................
GAS PIPING 27.............................................
ELECTRICAL CONNECTIONS 29.............................
J−BOX INSTALLATION 31...................................
VENTING 36...............................................
SPECIAL VENTING REQUIREMENTS FOR
INSTALLATIONS IN CANADA 36.............................
DIRECT VENT / 2−PIPE SYSTEM 40..........................
VENTILATED COMBUSTION AIR 41..........................
TERMINATION REQUIREMENTS FOR THE PROVINCES
OF ALBERTA AND SASKATCHEWAN 41......................
INSTALLING THE VENT TERMINATION 50....................
MAXIMUM EQUIVALENT VENT LENTH 55.....................
MAXIMUM ALLOWABLE EXPOSED VENT LENGTHS 58........
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 Z223.1−2012, 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.
To Next Page
Need help?
General
