NOTE: Read the entire instruction manual before starting the
installation.
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Table of Contents Page
DIMENSIONAL DRAWING........................................................2
SAFETY CONSIDERATIONS.....................................................3
Clearances to Combustibles......................................................3
CODES AND STANDARDS........................................................4
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS........5
INTRODUCTION..........................................................................5
APPLICATIONS............................................................................5
General ......................................................................................5
Upflow Applications.................................................................6
Downflow Applications............................................................7
Horizontal Left (Supply-Air Discharge) Applications ............9
Horizontal Right (Supply-Air Discharge) Applications ........11
LOCATION..................................................................................12
General ....................................................................................12
Furnace Location Relative to Cooling Equipment ................13
Hazardous Locations...............................................................13
AIR FOR COMBUSTION AND VENTILATION ....................13
General ....................................................................................13
Unconfined Space...................................................................14
Confined Space.......................................................................14
INSTALLATION.........................................................................15
Leveling Legs (If Desired).....................................................15
Installation In Upflow or Downflow Applications................17
Installation In Horizontal Applications..................................17
Air Ducts.................................................................................17
General Requirements .......................................................17
Ductwork Acoustical Treatment .......................................17
Supply Air Connections ....................................................17
Return Air Connections.....................................................18
Filter Arrangement ............................................................18
Bottom Closure Panel........................................................19
Gas Piping..........................................................................19
Electrical Connections ............................................................20
115-v Wiring......................................................................21
24-v Wiring........................................................................21
Accessories ........................................................................22
Venting....................................................................................22
Removal of Existing Furnaces from Common
Vent Systems.....................................................................22
Combustion-Air and Vent Piping .....................................23
Vent Termination...............................................................31
Multiventing.......................................................................31
Condensate Drain....................................................................31
General...............................................................................31
Application.........................................................................33
Condensate Drain Protection.............................................33
START-UP, ADJUSTMENTS AND
SAFETY CHECK...................................................................33
General...............................................................................33
Prime Condensate Trap With Water.................................34
Purge Gas Lines ................................................................34
Sequence of Operation ......................................................34
Heating Mode...............................................................34
Cooling Mode...............................................................35
Continuous Blower Mode............................................35
Heat Pump Mode .........................................................35
Component Test ...........................................................35
Adjustments .......................................................................36
Set Gas Input Rate.......................................................36
Set Temperature Rise...................................................40
Blower Off Delay (Heat Mode) ..................................41
Set Thermostat Heat Anticipator.................................41
Check Safety Controls.......................................................41
Check Primary Limit Control......................................41
A93040
Fig. 1—Multipoise Orientations
A93041
UPFLOW
DOWNFLOW
HORIZONTAL
LEFT
AIRFLOW
AIRFLOW
AIRFLOW
AIRFLOW
HORIZONTAL
RIGHT
ama
CERTIFIED
As an ENERGY STAR® Part-
ner, BRYANT Heating & Cool-
ing Systems Company has de-
termined that this product meets
the ENERGY STAR® guide-
lines for energy efficiency.
REGISTERED QUALITY SYSTEM
installation, start-up,
and operating instructions
4-WAY MULTIPOISE
FIXED-CAPACITY
CONDENSING GAS FURNACE
Cancels: II 345M-40-7 II 345M-40-8
12-03
345MAV
Series F
—1—
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