90+ SINGLE STAGE GAS FURNACE DIRECT OR NON-
DIRECT VENT
Category IV Furnace
*9U HX Upflow/Horizontal * Denotes Brands (C, H, T)
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified installer or agency must use factory-authorized kits or accessories
when modifying this product. Refer to the individual instructions packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions included in literature and
attached to the unit. Consult local building codes, the current editions of the National Fuel Gas Code (NFCG) NFPA 54/ANSI
Z223.1, and the National Electrical Code (NEC) NFPA 70.
In Canada refer to the current editions of the National standards of Canada CAN/CSA-B149.1 and .2 Natural Gas and Propane
Installation Codes, and Canadian Electrical Code CSA C22.1.
Recognize safety information. This is the safety-alert symbol /b,. When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury. Understand these signal words; DANGER, WARNING, and CAUTION. These
words are used with the safety-alert symbol. DANGER identifies the most serious hazards which will result in severe personal
injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe
practices which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which
will result in enhanced installation, reliability, or operation.
®
International Comfort Products, LLC Table of Contents
Lewisburg, TN 37091 U.S.A.
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 ........................ 32
INSTALLER: Affix these instructions
on or adjacent to the furnace.
CONSUMER: Retain these
instructions for future reference.
7. ElectricalWiring ............................ 36
8. DuctworkandFilter .......................... 37
9. ChecksandAdjustments...................... 39
10.FurnaceMaintenance........................ 41
11.Sequenceof Operation& Diagnostics............ 42
TechnicalSupport ............................. 44
O CARBON MONOXIDE POISONING AND FIRE
ELECTRIC SHOCK HAZARD HAZARD
Failure to follow this warning Failure to follow this warning could result in
could result in personal injury personal injury, death, and/or property dam-
and/or death, age.
Turn Off All Power Before This furnace is not designed for use in mobile
Servicing. homes, trailers or recreational vehicles.
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 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
t_nfirtl_,
Printedin U.S.A. 440 01 1050 06 Feb 2009
Specifications are subject to change without notice.