Filter
Top Products
NOTE: Read the entire instruction manual before starting the
installation.
Index Page
DIMENSIONAL DRAWING........................................................2
SAFETY CONSIDERATIONS.....................................................3
Clearances to Combustibles......................................................3
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS ....3-4
INTRODUCTION..........................................................................4
APPLICATIONS ......................................................................4-11
General......................................................................................4
Upflow Applications..............................................................4-7
Downflow Applications.........................................................7-8
Horizontal Left (Supply-Air Discharge) Applications.........8-9
Horizontal Right (Supply-Air Discharge) Applications.....9-11
LOCATION ............................................................................11-13
General...............................................................................11-12
Furnace Location Relative to Cooling Equipment ................12
Hazardous Locations...............................................................13
AIR FOR COMBUSTION AND VENTILATION...............13-14
General....................................................................................13
Unconfined Space...................................................................13
Confined Space..................................................................13-14
INSTALLATION....................................................................14-19
Leveling Legs (If Desired)................................................14-15
Installation On a Concrete Slab .............................................15
Installation On a Combustible Floor (Downflow
Applications)......................................................................15
Installation In Horizontal Applications..................................16
Air Ducts............................................................................16-17
Filter Arrangement..................................................................17
Bottom Closure Panel........................................................17-18
Gas Piping..........................................................................18-19
ELECTRICAL CONNECTIONS...........................................19-22
115-v Wiring......................................................................20-21
24-v Wiring.............................................................................22
Accessories..............................................................................22
VENTING...............................................................................22-29
Removal of Existing Furnaces from
Common Vent Systems................................................22-23
Combustion-Air and Vent Piping...........................................29
Vent Termination....................................................................29
Multiventing............................................................................29
CONDENSATE DRAIN ........................................................29-31
General....................................................................................29
Application..............................................................................29
Condensate Drain Protection.............................................29-31
SEQUENCE OF OPERATION..............................................31-32
Heating Mode..........................................................................31
Cooling Mode .........................................................................31
Continuous Blower Mode.......................................................31
Heat Pump Mode....................................................................31
Component Test......................................................................32
START-UP PROCEDURES ..................................................32-38
General....................................................................................32
Prime Condensate Trap With Water.................................32-33
Purge Gas Lines......................................................................33
Adjustments .......................................................................33-38
Set Gas Input Rate ............................................................33-38
Set Temperature Rise..............................................................38
Blower Off Delay (Heat Mode).............................................38
Set Thermostat Heat Anticipator............................................38
CHECK SAFETY CONTROLS..................................................39
Check Primary Limit Control.................................................39
Check Pressure Switch ...........................................................39
CHECKLIST...........................................................................39-40
A93040
®
ama
CANADIAN GAS ASSOCIATION
APPROVED
R
As an ENERGY STAR®
Partner, BRYANT Heat-
ing & Cooling Systems
Company has determined
that this product meets the
ENERGY STAR® guide-
lines for energy efficiency.
REGISTERED QUALITY SYSTEM
Fig. 1—Multipoise Orientations
A93041
UPFLOW
DOWNFLOW
HORIZONTAL
LEFT
AIRFLOW
AIRFLOW
AIRFLOW
AIRFLOW
HORIZONTAL
RIGHT
installation, start-up,
and operating instructions
4-WAY MULTIPOISE
FIXED-CAPACITY
CONDENSING GAS FURNACE
Cancels: II 345M-40-2 II 345M-40-3
5-99
345MAV
Series B
—1—