Installation, Start-up, Operating,
Service and Maintenance Instructions
NOTE: Read the entire instruction manual before starting the installation.
TABLE OF CONTENTS
REQUIRED NOTICE FOR MASSACHUSETTS INSTALLATIONS2
IMPORTANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Table 1 – Minimum Clearances to Combustible Materials for All Units
4
INTRODUCTION  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 2 – Loose Parts Bag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CODES AND STANDARDS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS PROCE-
DURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
LOCATION  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
AIR FOR COMBUSTION AND VENTILATION . . . . . . . . . . . . . . 7
Table 3 – Minimum Free Area Required for Each Combustion Air 
Opening or Duct to Outdoors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 4 – Minimum Space Volumes for 100% Combustion, Ventila-
tion and Dilution Air from Outdoors . . . . . . . . . . . . . . . . . . . . . . . 9
CONDENSATE TRAP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Condensate Drain Connection  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 5 – Opening Dimensions - In. (mm)  . . . . . . . . . . . . . . . . . 16
Table 6 – Air Filter Selection and Duct Sizing - In. (mm)  . . . . . 18
Table 7 – Filter Media Pressure Drop (Clean) Versus Airflow - In. 
W.C. (Pa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 8 – Filter Media Pressure Drop (Clean) Versus Face Velocity- 
In. W.C. (Pa)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
AIR DUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
GAS PIPING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 9 – Maximum Capacity of Pipe . . . . . . . . . . . . . . . . . . . . . 22
ELECTRICAL CONNECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . 23
115-V Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 10 – Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
24-V Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
VENTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 11 – Vent Termination Kit for Direct Vent (2-pipe) Systems31
Table 12 – Maximum Allowable Exposed Vent Lengths Insulation Ta-
ble. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 13 – Maximum Equivalent Vent Length - Ft. . . . . . . . . . . 42
Table 14 – Deductions from Maximum Equivalent Vent Length - Ft. 
(M) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Table 15 – Hanger Spacing  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table 16 – Approved Combustion-Air and Vent Pipe, Fitting and Ce-
ment Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
START-UP, ADJUSTMENT, AND SAFETY CHECK . . . . . . . . . 50
Table 17 – Cooling4 and Heating Air Delivery - CFM (Bottom Re-
turn5 with Filter)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 18 – Altitude Derate Multiplier for U.S.A. . . . . . . . . . . . . 55
Table 19 – Blower Off Delay Setup Switch  . . . . . . . . . . . . . . . . 58
Table 20 – Orifice Size and Manifold Pressure (In. W.C.) for Gas Input 
Rate  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 21 – Gas Rate (CU ft./hr). . . . . . . . . . . . . . . . . . . . . . . . . . 60
SERVICE AND MAINTENANCE PROCEDURES. . . . . . . . . . . . 60
WINTERIZATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
PARTS REPLACEMENT INFORMATION GUIDE . . . . . . . . . . . 75
MODEL NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Most  states  in  the  USA  and  jurisdictions  in  Canada  have  laws  that
require  the  use  of  Carbon  Monoxide  (CO)  alarms  with  fuel  burning
products. Examples of fuel burning products are furnaces, boilers, space
heaters,  generators,  water  heaters,  stoves/ranges,  clothes  dryers,
fireplaces,  incinerators,  automobiles,  and  other  internal  combustion
engines.  Even if there  are no laws in your  jurisdiction  requiring  a CO
Alarm, it’s highly recommended that whenever any fuel burning product
is used in or around the home or business that the dwelling be equipped
with  a  CO  Alarm(s).  The  Consumer  Product  Safety  Commission
recommends  the  use  of  CO  Alarm(s).  The  CO  Alarm(s)  must  be
installed,  operated,  and  maintained  according  to  the  CO  Alarm
manufacturer’s  instructions.  For  more  information  about  Carbon
Monoxide, local laws, or to purchase a CO Alarm online, please visit the
following website. https://www.kidde.com.
A200326
Portions of the text and tables are reprinted from NFPA 54/ANSI Z223.1E, 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.
F96CTN and G96CTN (Series A)
Two-Stage, Variable-Speed, Multipoise
35 in. (889 mm) Tall, Condensing Gas Furnace
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure  to  follow  this  warning  could  result  in  personal  injury  and/or
death.
Carbon Monoxide (CO) is a colorless, odorless, and tasteless poisonous
gas that can be fatal when inhaled. Follow all installation, maintenance,
and  service  instructions.  See  additional  information  below  regarding
the installation of a CO Alarm.
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 .