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..............................................................4-6
Downflow Applications.........................................................6-8
Horizontal Left (Supply-Air Discharge) Applications.........8-9
Horizontal Right (Supply-Air Discharge) Applications.....9-11
LOCATION ............................................................................11-12
General...............................................................................11-12
Low-Fire Only Installation.....................................................12
Furnace Location Relative to Cooling Equipment ................12
Hazardous Locations...............................................................12
INSTALLATION....................................................................13-16
Leveling Legs (If Desired).....................................................13
Installation On a Concrete Slab .............................................13
Installation On a Combustible Floor (Downflow
Applications)......................................................................13
Installation In Horizontal Applications..................................14
Filter Arrangement..................................................................14
Bottom Closure Panel.............................................................14
Gas Piping..........................................................................14-16
ELECTRICAL CONNECTIONS...........................................16-19
115-v Wiring......................................................................17-19
24-v Wiring.............................................................................19
Accessories..............................................................................19
DIRECT VENTING ...............................................................19-29
Removal of Existing Furnaces from
Common Vent Systems................................................19-20
Combustion-Air and Vent Piping .....................................20-25
Concentric Vent and Combustion-Air Termination
Kit Installation..............................................................25-27
Multiventing and Vent Terminations................................27-29
CONDENSATE DRAIN..............................................................29
General ....................................................................................29
Application..............................................................................29
Condensate Drain Protection..................................................29
SEQUENCE OF OPERATION..............................................30-32
Self-Test Mode........................................................................30
Heating Mode..........................................................................30
Heat Mode—Two Stage.........................................................30
Emergency Heat Mode......................................................30-31
Cooling Mode .........................................................................31
Heat Pump Mode...............................................................31-32
Continuous Fan Mode ............................................................32
Component Test......................................................................32
Bypass Humidifier Mode........................................................32
Dehumidification Mode..........................................................32
Zone Mode..............................................................................32
START-UP PROCEDURES ..................................................32-37
General...............................................................................32-33
Select Setup Switch Positions ................................................33
Prime Condensate Trap With Water......................................33
Purge Gas Lines ................................................................33-34
Adjustments .......................................................................34-37
Set Gas Input Rate ............................................................34-36
Set Temperature Rise..............................................................36
Set Thermostat Heat Anticipator............................................37
CHECK SAFETY CONTROLS ............................................37-38
Check Primary Limit Control.................................................37
Check Pressure Switch......................................................37-38
CHECKLIST...........................................................................38-39
A93040
®
ama
CANADIAN GAS ASSOCIATION
APPROVED
R
As an ENERGY STAR Partner, BDP Company has deter-
mined that this product meets the ENERGY STAR guidelines
for energy efficiency.
Fig. 1—Multipoise Orientations
A93041
UPFLOW
DOWNFLOW
HORIZONTAL
LEFT
AIRFLOW
AIRFLOW
AIRFLOW
AIRFLOW
HORIZONTAL
RIGHT
installation, start-up,
and operating instructions
4-WAY MULTIPOISE
VARIABLE-CAPACITY
CONDENSING GAS FURNACE
Cancels: II 355M-40-2 II 355M-40-3
6-95
355MAV
Series C
—1—
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