440 01 2024 04 Dec. 2010
Specifications are subject to change without notice.
INSTALLATION INSTRUCTIONS
90+ Two−Stage & Two−Stage, Variable
Category IV, Gas Furnace
C9MVX, H9MVX, T9MVX, C9MPV, H9MPV,
T9MPV, C9MPT, H9MPT, T9MPT
(Upflow/Downflow/Horizontal)
These instructions must be read and understood completely before attempting installation.
Safety Labeling and Signal Words
DANGER, WARNING, CAUTION, and NOTE
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.
DANGER − Immediate hazards which will result in
severe personal 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 enhanced installation, reliability, or
operation.
!
WARNING
Signal Words in Manuals
The signal word CAUTION is used throughout
this manual in the following manner:
!
CAUTION
Signal Words on Product Labeling
Signal words are used in combination with
colors and/or pictures or product labels.
The signal word WARNING is used throughout
this manual in the following manner:
Safety−alert symbol
When you see this symbol on the unit and in
instructions or manuals, be alert to the
potential for personal injury.
TABLE OF CONTENTS
Start-up Check Sheets 3.................................
Safety considerations 5...................................
Safe Installation Requirements 5.............................
Installation 7...........................................
Combustion & Ventilation Air 11..............................
Vent and Combustion Air Piping 15............................
Concentric Vent Termination 32...............................
Gas Supply and Piping 33..................................
Electrical Wiring 37.......................................
Ductwork and Filter 39.....................................
Checks and Adjustments 43.................................
Furnace Maintenance 46...................................
Sequence of Operation & Diagnostics (*9MPT) 47.................
Wiring Diagram *9MPT (Two-Stage Heating with PSC Motor) 49.......
Sequence of Operation & Diagnostics (*9MPV, *9MVX) 50...........
Wiring Diagram *9MPV, *9MVX (Variable Speed Blower Motor) 52......
Thermostat Wiring Guide 53.................................
Use of the AHRI Certified TM Mark indicates a
manufacturer’s participation in the program.
For verification of certification for individual
products, go to www.ahridirectory.org .
International Comfort Products, LLC
Lewisburg, TN 37091 U.S.A.
www.icpusa.com
!
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, and National standards of Canada
CAN/CSA−B149.1 and .2 Natural Gas and Propane
Installation Codes.
INSTALLER: Affix these instructions on or adjacent to the
furnace.
CONSUMER: Retain these instructions for future
reference.
Portions of the text and tables are reprinted from NFPA 54 /ANSI Z223.1−2009©, 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 entirety.
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