Bryant 373LAV Series Installation, Start-Up, And Operating Instructions Manual

NOTE: Read the entire instruction manual before starting the
installation.
This symbol → indicates a change since the last issue.
Index
SAFETY CONSIDERATIONS .....................................................1
Dimensional Drawing ...............................................................2
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
PROCEDURE ...........................................................................2
INTRODUCTION.......................................................................3-4
Clearances From Combustible Materials .................................3
LOCATION....................................................................................4
General ......................................................................................4
Location Relative to Cooling Equipment ................................4
Hazardous Locations.................................................................4
AIR FOR COMBUSTION AND VENTILATION...................4-5
Unconfined Space .....................................................................5
Confined Space .........................................................................5
AIR DUCTS................................................................................5-6
General Requirements...............................................................5
Ductwork Acoustical Treatment...............................................5
Supply-Air Connections............................................................6
Return-Air Connections ............................................................6
DOWNFLOW INSTALLATION ..................................................6
HORIZONTAL ATTIC INSTALLATION................................6-8
Construct a Working Platform ..............................................6-7
Install Furnace...........................................................................8
HORIZONTAL CRAWLSPACE INSTALLATION....................8
FILTER ARRANGEMENT...........................................................9
GAS PIPING.............................................................................9-11
ELECTRICAL CONNECTIONS ................................................11
115-v Wiring...........................................................................11
24-v Wiring.............................................................................11
Accessories..............................................................................11
VENTING ....................................................................................11
START-UP, ADJUSTMENT, AND SAFETY CHECK ............11
General ....................................................................................11
Sequence Of Operation...........................................................13
Heating Mode..........................................................................13
Cooling Mode .........................................................................13
Continuous Blower Mode.......................................................13
Heat Pump Mode ....................................................................13
Start-up Procedures............................................................13-15
Adjustments.............................................................................15
Set Gas Input Rate ............................................................18-19
Set Temperature Rise ........................................................18-19
Set Thermostat Heat Anticipator............................................19
Check Safety Controls.......................................................19-20
Checklist..................................................................................20

SAFETY CONSIDERATIONS

Installing and servicing heating equipment can be hazardous due to
gas and electrical components. Only trained and qualified person-
nel should install, repair, or service heating equipment.
Untrained personnel can perform basic maintenance functions
such as cleaning and replacing air filters. All other operations must
installation, start-up,
and operating instructions
DOWNFLOW/HORIZONTAL
GAS-FIRED
INDUCED-COMBUSTION FURNACES
Page
-1-
Cancels: II 373L-35-21
REGISTERED QUALITY SYSTEM
be performed by trained service personnel. When working on
heating equipment, observe precautions in the literature, on tags,
and on labels attached to or shipped with the unit and other safety
precautions that may apply.
In the United States, follow all safety codes including the National
Fuel Gas Code (NFGC) NFPA 54-1999/ANSI Z223.1-1999 and
the Installation Standards, Warm Air Heating and Air Condition-
ing Systems (NFPA 90B) ANSI/NFPA 90B.
In Canada, refer to the CAN/CGA-B149.1- and .2-M95 National
Standard of Canada, Natural Gas and Propane Installation Codes
(NSCNGPIC).
Wear safety glasses and work gloves. Have fire extinguisher
available during start-up and adjustment procedures and service
calls.
Recognize safety information. This is the safety-alert symbol
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies a hazard
which could result in personal injury or death. CAUTION is used
to identify unsafe practices which would result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability,
or operation.
These instructions cover minimum requirements and conform to
existing national standards and safety codes. In some instances,
these instructions exceed certain local codes and ordinances,
especially those that may not have kept up with changing residen-
tial construction practices. We require these instructions as a
minimum for a safe installation.
373LAV
Series H&J
II 373L-35-23
10-00
ama
CERTIFIED
.