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TABLE OF CONTENTS
IMPORTANT SAFETY INFORMATION ........................... 3
REQUIREMENTS & CODES ........................................... 4
GENERAL INFORMATION .............................................. 5
Before you install this unit .............................................. 5
Locating the Equipment ................................................. 5
Heating Load ................................................................. 5
COMBUSTION AIR & VENTING REQUIREMENTS ....... 6
General Information ....................................................... 6
Vent Termination ........................................................... 6
CIRCULATING AIR SUPPLY .......................................... 7
Air Ducts .................................................................... 7
Air Filter Requirements .............................................. 8
Unconditioned Spaces ............................................... 8
Acoustical Duct Work ................................................. 8
UNIT INSTALLATION ...................................................... 9
Packaging Removal ....................................................... 9
Rigging & Hoisting ......................................................... 9
Clearances to Combustible Materials ............................ 9
Rooftop .......................................................................... 9
Ground Level ................................................................. 9
Horizontal to Downflow Conversion ............................... 9
Condensate Drain .......................................................... 9
ELECTRICAL WIRING .................................................... 10
Pre-Electrical Checklist .................................................. 10
Grounding ...................................................................... 10
Line Voltage ................................................................... 10
Thermostat / Low Voltage Connections ......................... 11
Checking Heat Anticipator Settings ........................... 11
Blower Speed ................................................................ 11
5-Speed ECM Motor .................................................. 11
Optional Furnace Control Board Connections ............... 11
Electronic Air Cleaner ................................................ 11
Humidifier ................................................................... 12
GAS SUPPLY & PIPING .................................................. 12
Leak Check .................................................................... 12
High Altitude Conversion - Natural Gas ......................... 12
START UP & ADJUSTMENTS ........................................ 13
Pre-Start Check List ...................................................... 13
Start-Up Procedure ........................................................ 13
Air Circulation ............................................................. 13
System Cooling .......................................................... 13
System Heating .......................................................... 14
Verifying & Adjusting Temperature Rise ........................ 14
Verifying & Adjusting Firing Rate ................................... 14
Manifold Pressure Adjustment ....................................... 14
Verifying Over-Temperature Limit Control Operation .... 14
Verifying Burner Operation ............................................ 14
Verify Operation of the Supply Air Limit Switch ............. 15
OPERATING SEQUENCE ............................................... 15
Heating Cycle ................................................................ 15
Cooling Cycle ................................................................ 15
Fan Mode ...................................................................... 15
EQUIPMENT MAINTENANCE ......................................... 15
Heat Exchanger & Burner Maintenance ........................ 16
Lubrication ..................................................................... 16
Cleaning of Flame Sensor ............................................. 16
TROUBLESHOOTING ..................................................... 17
FIGURES & TABLES ....................................................... 18
Figure 10. Unit Dimensions ........................................ 18
Table 5. Center of Gravity & Unit Shipping Weights .. 18
Airflow Data ................................................................... 19
Table 6. Nominal Heating Airflow Rates &
Temperature Rises (° F) .............................. 19
Table 7. Nominal Cooling Airflow Rates &
Temperature Rises (° F) .............................. 20
Gas Information ............................................................. 21
Table 8. Gas Pipe Capacities .................................... 21
Table 9. Gas Flow Rates ........................................... 21
Figure 11. Gas Valve Label ....................................... 22
Wiring Diagram & Electrical Data .................................. 23
Figure 12. Wiring Diagram for 230V / 60 Hz
Unit ........................................................... 23
Figure 13. Wiring Diagram for 230V / 60 Hz
Unit with ECM Outdoor Motor ................... 24
Table 10. Electrical Data. ........................................... 25
FURNACE COMPONENTS ............................................. 26
Figure 14. Component Locations ............................... 26
INSTALLATION CHECKLIST .......................................... 2
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REPLACEMENT PARTS ................................................. 2
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