![background image](http://html1.mh-extra.com/html/international-comfort-products/f8mxl/f8mxl_installation-instructions-manual_2079720001.webp)
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, Washing-
ton, 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.
Printed in U.S.A.
441 01 1411 04 July 2013
INSTALLATION INSTRUCTIONS
80% Single Stage, ECM Motor
Category I, Gas Furnace
F8MXN, G8MXN, F8MXL, G8MXL
These instructions must be read and understood completely before attempting installation.
Safety Labeling and Signal Words
DANGER, WARNING, CAUTION, and NOTE
Signal Words in Manuals
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.
The signal word
WARNING
is used throughout this manual in
the following manner:
The signal word
CAUTION
is used throughout this manual in
the following manner:
!
WARNING
DANGER
−
Immediate hazards which will result in severe person-
al 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 en-
hanced installation, reliability, or operation.
!
CAUTION
Signal Words on Product Labeling
Signal words are used in combination with colors and/or pictures
or product labels.
Safety
−
alert symbol
When you see this symbol on the unit and in instructions or manu-
als, be alert to the potential for personal injury.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CODES AND STANDARDS
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTROSTATIC DISCHARGE (ESD)
PRECAUTIONS PROCEDURE
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LOCATION
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AIR FOR COMBUSTION AND VENTILATION
8
. . . . . . . . . . . . . . . . .
INSTALLATION
10
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UPFLOW INSTALLATION
10
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DOWNFLOW INSTALLATION
11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HORIZONTAL INSTALLATION
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FILTER ARRANGEMENT
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AIR DUCTS
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GAS PIPING
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL CONNECTIONS
19
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
SERVICE AND MAINTENANCE PROCEDURES
40
. . . . . . . . . . . . .
SEQUENCE OF OPERATION
44
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WIRING DIAGRAM
46
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING GUIDE
47
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Use of the AHRI Certified TM Mark indic-
ates a manufacturer’s participation in the
program. For verification of certification for
individual products, go to www.ahridirect-
ory.org .
!
WARNING
PERSONAL INJURY, AND/OR PROPERTY
DAMAGE HAZARD
Failure to carefully read and follow this warning could
result in equipment malfunction, property damage,
personal injury and/or death.
Installation or repairs made by unqualified persons
could result in equipment malfunction, property
damage, personal injury and/or death.
The information contained in this manual is intended for
use by a qualified service technician familiar with safety
procedures and equipped with proper tools and test
instruments.
Installation must conform with local building codes and
with the Natural Fuel Gas Code (NFCG) NFPA
54/ANSI Z223.1
INSTALLER:
Affix these instructions on or adjacent to the furnace.
CONSUMER:
Retain these instructions for future reference.