Sears N8MPL050B12B1 - Manual

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80 + Single Stage
Category I Furnace
N8MPN & N8MPL
*8MPN & *8MPL
* Denotes Brands (C, H, T)
See section 5 for Category I definition.
SAFETY REQUIREMENTS
Recognize safety information. This is the safetv-alert symbol/^ . 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 CAUTION. These words areused with the safety-alert symbol. Q4/VGER identifies the
most serious hazards, those that will result in severe personal injury or death. 14^/i/?A//A/G signifies a hazard that could result in personal injury or
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) CSAB149.1 -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.
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Lewis burg, TN 37091
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INSTALLER: Affix these instructions
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
A WARNING
ELECTRIC SHOCK HAZARD
Failure to follow safety warnings
exactly could result in serious
injury and/or death.
Turn Off All Power Before
Servicing.
9. Electrical Wiring ................................................................. 21
10. Ductwork and Filter (Upflow/Horizontal) .......................... 22
11. Ductwork and Filter (Downflow) ........................................25
12. Checks and Adjustments................................................... 27
13. Furnace Maintenance ........................................................ 32
14. Sequence of Operation & Diagnostics..............................34
Tech Support and Parts........................................................... 35
A WARNING
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©, vi/ith 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.
Printed in U.S.A. 11/10/2005
441 01 2613 (02)