NOTE: Read the entire instruction manual before starting the
installation.
This symbol →indicates a change since the last issue.
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 ............................................................................11-12
General...............................................................................11-12
Furnace Location Relative to Cooling Equipment................12
Hazardous Locations...............................................................12
INSTALLATION....................................................................13-17
Leveling Legs (If Desired).....................................................13
Installation In Upflow or Downflow Applications ..........13-15
Installation In Horizontal Applications..................................15
Filter Arrangement..................................................................16
Bottom Closure Panel.............................................................16
Gas Piping...............................................................................17
ELECTRICAL CONNECTIONS...........................................17-20
115-v Wiring......................................................................17-18
24-v Wiring.............................................................................18
Wiring Diagram ......................................................................19
Accessories..............................................................................20
DIRECT VENTING ...............................................................21-29
Removal of Existing Furnaces from
Common Vent Systems.....................................................21
Combustion-Air and Vent Piping.....................................21-27
Concentric Vent and Combustion-Air Termination
Kit Installation..............................................................27-29
Multiventing and Vent Termination.......................................29
CONDENSATE DRAIN ........................................................29-31
General....................................................................................29
Application.........................................................................29-31
Condensate Drain Protection..................................................31
SEQUENCE OF OPERATION..............................................31-33
Heating Mode ....................................................................31-32
Cooling Mode .........................................................................32
Continuous Blower Mode.......................................................32
Heat Pump Mode....................................................................32
Component Test.................................................................32-33
START-UP PROCEDURES ..................................................33-41
General....................................................................................33
Prime Condensate Trap With Water......................................33
Purge Gas Lines......................................................................34
Adjustments.......................................................................34-41
Set Gas Input Rate ............................................................34-40
Set Temperature Rise........................................................40-41
Blower Off Delay (Heat Mode).............................................41
Set Thermostat Heat Anticipator............................................41
CHECK SAFETY CONTROLS..................................................41
Check Primary Limit Control.................................................41
Check Pressure Switch...........................................................41
CHECKLIST...........................................................................41-42
A93040
®ama
CANADIAN GAS ASSOCIATION
APPROVED
R
As an ENERGY STARSM
Partner, Bryant/Day &
Night has determined that
thisproduct meets the EN-
ERGY STAR guidelines
forenergy efficiency.
CERTIFICATION OF MANUFACTURING SITE
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 DIRECT-VENT

CONDENSING GAS FURNACE

Cancels: II 340M-40-3 II 340M-40-4
12-96

340MAV

Series D

—1—