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NOTE:
Read the entire instruction manual before starting the
installation.
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TABLE OF CONTENTS
SAFETY CONSIDERATIONS .....................................................2
INTRODUCTION ..........................................................................3
CODES AND STANDARDS........................................................3
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS........3
APPLICATIONS............................................................................5
General ......................................................................................5
Upflow Applications.................................................................5
Condensate Trap Location (Factory-Shipped
Orientation) ..........................................................................5
Condensate Trap Tubing (Factory-Shipped
Orientation) ..........................................................................6
Condensate Trap Location (Alternate Upflow
Orientation) ..........................................................................6
Condensate Trap Tubing (Alternate Upflow
Orientation) ..........................................................................7
Condensate Trap Field Drain Attachment ..........................7
Pressure Switch Tubing.......................................................7
Upper Collector Box Drain Connection .............................7
Upper Inducer Housing Drain Connection .........................8
Condensate Trap Freeze Protection ....................................8
Downflow Applications ............................................................8
Condensate Trap Location ..................................................8
Condensate Trap Tubing .....................................................8
Condensate Trap Field Drain Attachment ..........................9
Pressure Switch Tubing.......................................................9
Condensate Trap Freeze Protection ....................................9
Horizontal Left (Supply-Air Discharge) Applications ............9
Condensate Trap Location ..................................................9
Condensate Trap Tubing .....................................................9
Condensate Trap Field Drain Attachments ......................10
Pressure Switch Tubing.....................................................10
Condensate Trap Freeze Protection ..................................10
Construct a Working Platform ..........................................10
Horizontal Right (Supply-Air Discharge) Applications ........10
Condensate Trap Location ................................................11
Condensate Trap Tubing ...................................................11
Condensate Trap Field Drain Attachment ........................12
Pressure Switch Tubing.....................................................12
Condensate Trap Freeze Protection ..................................12
Construct a Working Platform ..........................................12
LOCATION..................................................................................12
General ....................................................................................12
Furnace Location Relative to Cooling Equipment ................13
Hazardous Locations...............................................................14
INSTALLATION .........................................................................14
Leveling Legs (If Desired) .....................................................14
Installation in Upflow and Downflow Applications..............14
Installation in Horizontal Applications ..................................16
Air Ducts.................................................................................16
General Requirements .......................................................16
Ductwork Acoustical Treatment .......................................16
Supply Air Connections ....................................................16
Return Air Connections.....................................................16
Filter Arrangement..................................................................17
Bottom Closure Panel.............................................................18
Gas Piping...............................................................................18
Electrical Connections ............................................................19
115–v Wiring.....................................................................19
24–v Wiring.......................................................................20
Accessories ........................................................................20
Direct Venting.........................................................................21
Removal of Existing Furnaces from Common Vent
Systems ..............................................................................21
Combustion-Air and Vent Piping .....................................24
Concentric Vent and Combustion-Air Termination Kit
Installation..........................................................................27
Multiventing and Vent Terminations................................31
Condensate Drain....................................................................32
General...............................................................................32
Application.........................................................................32
Condensation Drain Protection .........................................33
Sequence of Operation............................................................34
Heating Mode ....................................................................35
Cooling Mode ....................................................................35
Thermidistat Mode ............................................................38
Continuous Blower Mode .................................................38
Heat Pump Mode...............................................................38
Component Test.................................................................39
START-UP PROCEDURES........................................................39
General ....................................................................................39
Prime Condensate Trap With Water ......................................39
Purge Gas Lines......................................................................40
Adjustments.............................................................................40
Set Gas Input Rate ............................................................40
Set Temperature Rise ........................................................43
Adjust Blower Off Delay (Heat Mode)............................45
Set Thermostat Heat Anticipator ......................................45
Check Safety Controls ............................................................45
A93040
installation, start-up,
and operating instructions
DELUXE 4–WAY MULTIPOISE
FIXED-CAPACITY DIRECT-VENT
CONDENSING GAS FURNACE
Cancels:
II 350M-40-15
II 350M-40-16
11-03
350MAV
Series H
—1—
Summary of Contents for CONDENSING GAS FURNACE 350MAV
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