Bryant 925TA - User Manual

1
925TA
TWO--STAGE, 4--WAY MULTIPOISE
CONDENSING GAS FURNACE
SERIES B
Installation, Start---up, Operating and
Se rvice and Maint e nance I ns t ructio ns
NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS 3.........................
INTRODUCTION 4...................................
CODES AND STANDARDS 4...........................
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS 5...
ACCESSORIES 5.....................................
LOCATION 8........................................
General 8.........................................
AIR FOR COMBUSTION AND VENTILATION 9..........
Introduction 9.....................................
CONDENSATE TRAP 12...............................
Upflow 12........................................
Downflow 12.....................................
Horizontal 12.....................................
CONDENSATE DRAIN 16.............................
INSTALLATION 20...................................
Upflow 20........................................
Downflow 21.....................................
Horizontal 21......................................
Filter Arrangement 25...............................
AIR DUCTS 31.......................................
General Requirements 31.............................
Ductwork Acoustical Treatment 33.....................
GAS PIPING 33......................................
ELECTRICAL CONNECTIONS 34.......................
115--V Wiring 34...................................
J--Box Installation 35................................
24--V Wiring 35....................................
Accessories 36.....................................
Alternate Power Supplies 36..........................
VENTING 40........................................
Special Venting Requirements for Installations in Canada 40.
General 41........................................
Materials 41.......................................
Venting Systems 41.................................
Combustion Air and Vent Piping Insulation Guidelines 45...
Installing the Termination 47..........................
Venting System Length Calculations 51.................
START--UP, ADJUSTMENT, AND SAFETY CHECK 63......
General 63.........................................
Thermostat Setup Switch 63............................
Prime Condensate Trap 63.............................
Adjustments 64......................................
SERVICE AND MAINTENANCE PROCEDURES 72........
Cleaning Heat Exchangers 77...........................
SEQUENCE OF OPERATION 80........................
PARTS REPLACEMENT GUIDE 86......................
TABLES
Loose Parts Bag 5.....................................
Minimum Clearances to Combustible Materials 5.............
Minimum Free Area Required 11.........................
Minimum Space Volumes 11.............................
Filter Size Information 25...............................
Opening Dimensions 27................................
Air Delivery CFM 32...................................
Maximum Capacity of Pipe 34...........................
Electrical Data 36......................................
Vent Termination Kit for Direct Vent (2--Pipe) Systems 42......
Combustion--Air Vent Pipe, Fitting & Cement Material.. 48.....
Maximum Allowable Exposed Vent Lengths Insulation 49......
Maximum Equivalent Vent Length 50......................
Deductions from Maximum Equivalent Vent Length 50........
Altitude Derate Multiplier for U.S.A. 69....................
Blower Off Delay Setup Switch 69........................
Gas Rate 69..........................................
Orifice Size and Manifold Pressure 71.....................
CERTIFIED
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--2012E, 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.

Bryant 925TA Specifications

General

Brand	Bryant
Model	925TA
Category	Furnace
Language	English