Carrier 120 Series User Manual

1
59MN7A
Modulating 4---Way Multipoise
Condensing Gas Furnace
Series 120
Installation, Start---up, Operating and
Se rvice and Mainte nance Ins t ructions
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 5........................................
AIR FOR COMBUSTION AND VENTILATION 10.........
CONDENSATE TRAP 12...............................
Upflow 12........................................
Downflow 12.....................................
Horizontal 12......................................
CONDENSATE DRAIN 16.............................
INSTALLATION 19...................................
Upflow 19........................................
Downflow 20.....................................
Horizontal 20......................................
Filter Arrangement 21...............................
AIR DUCTS 29.......................................
Ductwork Acoustical Treatment 29.....................
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 41........................................
Special Venting Requirements for Installations in Canada 41.
Materials 42.......................................
Venting Systems 42.................................
Locating Vent Termination 43.........................
Size the Vent and Combustion Air Pipes 44...............
Combustion Air and Vent Piping Insulation Guidelines 45...
Configure the Furnace 45............................
Installing the Vent Termination 47......................
Venting System Length Calculations 51.................
START--UP, ADJUSTMENT, AND SAFETY CHECK 63......
Select Setup Switch Positions 63........................
Prime Condensate Trap 64.............................
Purge Gas Lines 64...................................
Adjustments 64......................................
Check Safety Controls 68..............................
Checklist 68........................................
SERVICE AND MAINTENANCE PROCEDURES 78........
Cleaning Heat Exchangers 83...........................
SEQUENCE OF OPERATION 90........................
PARTS REPLACEMENT GUIDE 95......................
TABLE
Loose Parts Bag Contents 7..............................
Minimum Clearances to Combustible Materials 7.............
Minimum Free Area Required 11.........................
Minimum S pace Volumes 11.............................
Filter Size Information 23...............................
Opening Dimensions 25................................
Air Delivery CFM 30...................................
Maximum Capacity of Pipe 34...........................
Electrical Data 36......................................
Vent Termination Kit for Direct Vent (2--Pipe) Systems 43......
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. 73....................
Blower Off Delay Setup Switch 73........................
Gas Rate 73..........................................
Orifice Size and Manifold Pressure 76.....................
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.

Carrier 120 Series Specifications

General

Brand	Carrier
Model	120 Series
Category	Furnace
Language	English