441 01 4200 01
11/15/2019
INSTALLATION INSTRUCTIONS
4--Way Multipoise, Ultra Low NOx
Communicating, 80% AFUE Gas Furnace
F80CSU, G80CSU
SAFETY CONSIDERATIONS
2
. . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CODES AND STANDARDS
4
. . . . . . . . . . . . . . . . . . . . . . .
SAFETY
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL INSTALLATION
4
. . . . . . . . . . . . . . . . . . . . . .
COMBUSTION AND VENTILATION AIR
4
. . . . . . . . . . .
DUCT SYSTEMS
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ACOUSTICAL LINING AND FIBROUS GLASS DUCT 4
GAS PIPING AND GAS PIPE PRESSURE TESTING
4
. . .
ELECTRICAL CONNECTIONS
4
. . . . . . . . . . . . . . . . . . .
VENTING
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTROSTATIC DISCHARGE
PRECAUTIONS PROCEDURE
4
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LOCATION
5
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SAFETY CONSIDERATIONS
7
. . . . . . . . . . . . . . . . . . . . . . . .
AIR FOR COMBUSTION AND VENTILATION
7
. . . . . . . . . .
INSTALLATION
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UPFLOW INSTALLATION
9
. . . . . . . . . . . . . . . . . . . . . . .
DOWNFLOW INSTALLATION
9
. . . . . . . . . . . . . . . . . . . .
HORIZONTAL INSTALLATION
10
. . . . . . . . . . . . . . . . . .
AIR DUCTS
11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GAS PIPING
14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL CONNECTIONS
15
. . . . . . . . . . . . . . . . . .
115--V WIRING
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J--BOX RELOCATION
16
. . . . . . . . . . . . . . . . . . . . . . . . . .
24--V WIRING
17
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ACCESSORIES
17
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VENTING
20
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MASONRY CHIMNEY REQUIREMENTS
20
. . . . . . . . . .
APPLIANCE APPLICATION REQUIREMENTS
21
. . . . .
ADDITIONAL VENTING REQUIREMENTS
23
. . . . . . . .
SIDEWALL VENTING
23
. . . . . . . . . . . . . . . . . . . . . . . . . .
START--UP, ADJUSTMENT, AND SAFETY CHECK
25
. . . . .
GENERAL
25
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
START--UP PROCEDURES
25
. . . . . . . . . . . . . . . . . . . . . .
ADJUSTMENTS
25
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FURNACE SETUP SWITCHES
26
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AIR DELIVERY -- CFM
30
. . . . . . . . . . . . . . . . . . . . . . . . .
COOLING OR CONTINUOUS AIRFLOW
32
. . . . . . . . . .
CHECK SAFETY CONTROLS
32
. . . . . . . . . . . . . . . . . . .
CHECKLIST
33
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SERVICE AND MAINTENANCE PROCEDURES
35
. . . . . . .
ELECTRICAL CONTROLS AND WIRING
35
. . . . . . . . .
CARE AND MAINTENANCE
36
. . . . . . . . . . . . . . . . . . . .
COMPONENT TEST
36
. . . . . . . . . . . . . . . . . . . . . . . . . . .
CLEANING AND/OR REPLACING AIR FILTER
37
.
BLOWER MOTOR AND WHEEL
37
. . . . . . . . . . . . . .
FLAME SENSOR CLEANING AND SERVICING 38
.
CLEANING HEAT EXCHANGER
39
. . . . . . . . . . . . . .
SEQUENCE OF OPERATION
40
. . . . . . . . . . . . . . . . . . . .
WIRING DIAGRAMS
43
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PARTS REPLACEMENT INFORMATION GUIDE
44
. . . .
Approved for installations up to 5,400 feet (1646 meters)
NOTE
: Read the entire instruction manual before starting the
installation.
Portions of the text and tables are reprinted from current edition
of 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.
