CARBON MONOXIDE POISONING AND FIRE
HAZARD.
Failure to follow safety warnings could result
in personal injury, death, and/or property dam-
age.
This furnace is not designed for use in mobile
homes, trailers or recreational vehicles.
!
WARNING
!
ELECTRIC SHOCK HAZARD.
Failure to follow this warning
could result in personal injury,
and/or death.
Turn Off All Power Before
Servicing.
International Comfort Products, LLC
Lewisburg, TN 37091 U.S.A.
INSTALLER: Affix these instructions
on or adjacent to the furnace.
CONSUMER: Retain these
instructions for future reference.
WARNING
* Denotes Brands (C, H, T)
Portions of the text and tables are reprinted from NFPA 54 / ANSI Z223.1--2006
©
, with permission of National Fire Protection Association, Quincy, MA 02269 and American Gas Associa-
tion, 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.
Printed in U.S.A.
440 01 1024 01
July 2007
Specifications are subject to change without notice
90+ SINGLE STAGE GAS FURNACE
DIRECT OR NON--DIRECT VENT FAN ASSISTED
Category IV Furnace
N9MP1/N9MP2/N9MPD/*9MPD
Upflow/Downflow/Horizontal
SAFETY REQUIREMENTS
Recognize safety information. This is the safety--alert symbol
!
. When you see this symbol on the furnace and in instructions manuals be alert to
the potential for personal injury.
Understand the signal words
DANGER, WARNING,
or
CAUTION.
These words are used with the safety--alert symbol.
DANGER
identifies the
most serious hazards, those that
will
result in severe personal injury or death.
WARNING
signifies a hazard that
could
result in personal injury or
death.
CAUTION
is used to identify unsafe practices that
could
result in minor personal injury or product and property damage. Note is used to
highlight suggestions that will result in enhanced installation, reliability, or operation.
Installing and servicing heating equipment can be hazardous due to gas and electrical components. Only trained and qualified personnel should
install, repair, or service heating equipment.
Untrained service personnel can perform basic maintenance functions such as cleaning and replacing air filters. All other operations must be
performed by trained service personnel. When working on heating equipment, observe precautions in the literature, on tags, and on labels attached
to or shipped with the unit and other safety precautions that may apply.
Follow all safety codes. In the United States, follow all safety codes including the current edition National Fuel Gas Code (NFGC) ANSI
Z223.1--2006/NFPA No. 54--2006. In Canada, refer to the current edition of the National Standard of Canada Natural Gas and Propane Installation
Code (NSCNGPIC) CSA B149.1--05. Wear safety glasses and work gloves. Have fire extinguisher available during start--up and adjustment
procedures and service calls.
These instructions cover minimum requirements and conform to existing national standards and safety codes. In some instances, these instructions
exceed certain local codes and ordinances, especially those that may not have kept up with changing residential construction practices. We require
these instructions as a minimum for a safe installation.
Table of Contents
1. Safe Installation Requirements
4
. . . . . . . . . . . . . . . . . . .
2. Installation
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. Combustion & Ventilation Air
9
. . . . . . . . . . . . . . . . . . . .
4. Vent & Combustion Air Piping
13
. . . . . . . . . . . . . . . . . . .
5. Concentric Vent Termination
30
. . . . . . . . . . . . . . . . . . . .
6. Gas Supply and Piping
33
. . . . . . . . . . . . . . . . . . . . . . . .
7. Electrical Wiring
38
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
8. Ductwork and Filter
39
. . . . . . . . . . . . . . . . . . . . . . . . . .
9. Checks and Adjustments
42
. . . . . . . . . . . . . . . . . . . . . .
10. Furnace Maintenance
44
. . . . . . . . . . . . . . . . . . . . . . . .
11. Sequence of Operation & Diagnostics
45
. . . . . . . . . . . .
Technical Support
47
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
