926TB
TWO--STAGE, VARIABLE--SPEED ECM
MULTIPOISE CONDENSING GAS FURNACE
Installation, Start--up, Operating and
Service and Maintenance Instructions
NOTE
: Read the entire instruction manual before starting the installation.
SECTIONS
SAFETY CONSIDERATIONS
4
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INTRODUCTION
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CODES AND STANDARDS
6
. . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
6
. . .
ACCESSORIES
6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LOCATION
7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AIR FOR COMBUSTION AND VENTILATION
9
. . . . . . . . . .
CONDENSATE TRAP
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONDENSATE DRAIN
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INSTALLATION
17
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AIR DUCTS
30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GAS PIPING
30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL CONNECTIONS
32
. . . . . . . . . . . . . . . . . . . . . . .
VENTING
38
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START--UP, ADJUSTMENT, AND SAFETY CHECK
60
. . . . . .
SERVICE AND MAINTENANCE PROCEDURES
70
. . . . . . . .
SEQUENCE OF OPERATION
78
. . . . . . . . . . . . . . . . . . . . . . . .
PARTS REPLACEMENT GUIDE
84
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TABLES
Loose Parts Bag Contents
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum Clearances to Combustible Materials
5
. . . . . . . . . . . . .
Minimum Free Area Required
11
. . . . . . . . . . . . . . . . . . . . . . . . .
Minimum Space Volumes
11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filter Size Information
23
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Opening Dimensions
23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Delivery CFM
26
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Capacity of Pipe
31
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Electrical Data
35
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Combustion--Air Vent Pipe, Fitting & Cement Material..
40
. . . . .
Vent Termination Kit for Direct Vent (2--Pipe) Systems
41
. . . . . .
Hangar Spacing
49
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Allowable Exposed Vent Lengths Insulation
52
. . . . . .
Maximum Equivalent Vent Length
53
. . . . . . . . . . . . . . . . . . . . . .
Deductions from Maximum Equivalent Vent Length
53
. . . . . . . .
Altitude Derate Multiplier for U.S.A.
68
. . . . . . . . . . . . . . . . . . . .
Blower Off Delay Setup Switch
68
. . . . . . . . . . . . . . . . . . . . . . . .
Gas Rate
68
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Orifice Size and Manifold Pressure
69
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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 .
Portions of the text and tables are reprinted from NFPA 54/ANSI Z223.1
E
, 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.
