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CategoryI Furnace
N8MPN& N8MPL
*8MPN& *8MPL
* Denotes Brands (C, H, T)
See section 5 for Category [ definition.
SAFETY REQUIREMENTS
Recognize safety information. This is the safety-alert symbolZl._. When you see this symbol on the furnace and in instruction manuals be alert
to the potential for personal injury.
Understand the signal words DANGER, WARNING, or CA UTION. 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. WARNINGsignifiesahazardthatcouldresultinpersonalinjuryor
death. CAUTIONis 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 at-
tached to or shipped with the furnace and other safety precautions that may apply.
Follow all safety codes. In the United States, follow all safety codes including the National Fuel Gas Code (NFGC) ANSI Z223.1-2002/NFPA
54-2002. In Canada, refer to 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 practic-
es. We require these instructions as a minimum for a safe installation.
International Comfort Products, LLC
INSTALLER: Affix these instructions
Lewisburg, TN 37097
on or adjacent to the furnace.
CONSUMER: Retain these
instructions for future reference.
Table of Contents
1. Safe Installation Requirements ................ 3
2. Installation ............................... 4
3. Side Venting .............................. 8
4. Combustion & Ventilation Air ................. 9
5. Gas Vent Installation ....................... 11
6. Horizontal Venting ......................... 13
7. Masonry Chimney Venting ................... 15
8. Gas Supply and Piping ..................... 18
9. ElectricalWiring ............................ 21
10.DuctworkandFilter (Upflow/Horizontal) .......... 22
11.DuctworkandFilter (Downflow) ................ 25
12.ChecksandAdjustments...................... 27
13.FurnaceMaintenance ........................ 32
14.SequenceofOperation&Diagnostics............ 34
TechSupportand Parts.......................... 35
ELECTRIC SHOCK HAZARD
Failure to follow safety warnings
exactly could result in serious
injury and/or death.
Turn Off All Power Before
Servicing.
CARBON MONOXIDE POISONING AND FIRE
HAZARD.
Failure to follow safety warnings exactly could
result in serious injury, death, and/or property
damage.
This furnace is not designed for use in mobile
homes, trailers or recreational vehicles.
Portions of the text and tables are reprinted from NFPA 54 / ANSI Z223,1-2002©, 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 ofthe NFPA or ANSI, on the referenced subject, which is represented only by the standard in its entirety,
PrintedinU.S.A. 11/10/2005 441 01 2613 (02)