Table of Contents
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IMPORTANT SAFETY INFORMATION .......................3
REQUIREMENTS & CODES .......................................4
GENERAL INFORMATION ..........................................5
Before You Install this Unit .........................................5
Locating the Equipment .............................................5
Combustion Air Requirements ..................................5
Heating Load ............................................................5
General Information ..................................................7
Vent Termination .......................................................7
CIRCULATING AIR SUPPLY ......................................8
Air Ducts ...................................................................8
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
Condensate Drain .....................................................9
Horizontal to Downflow Conversion ...........................9
ELECTRICAL WIRING ............................................... 10
Pre - Electrical Checklist ......................................... 11
Grounding ................................................................ 11
Line Voltage ............................................................. 11
Thermostat / Low Voltage Connections .................. 11
Checking Heat Anticipator Settings ...................... 11
Blower Speed .......................................................... 12
5-Speed ECM Motor ............................................ 12
PSC Motor ........................................................... 12
Optional Furnace Control Board Connections ........ 12
Electronic Air Cleaner .......................................... 12
Humidifier ............................................................. 12
GAS SUPPLY & PIPING ............................................ 13
Leak Check .............................................................. 13
High Altitude Conversion - Natural Gas .................. 14
Lp / Propane Gas Conversion ................................. 14
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TAbLE OF CONTENTS
STARTUP & ADJUSTMENTS ................................... 16
Pre - Start Checklist ................................................ 16
Start-up Procedure .................................................. 16
Air Circulation ....................................................... 16
System Cooling .................................................... 16
System Heating .................................................... 16
Verifying & Adjusting Temperature Rise .................. 16
Verifying & Adjusting Firing Rate ............................. 17
Manifold Pressure Adjustment ................................ 17
Limit Control ............................................................ 17
Verifying Burner Operation ...................................... 18
Refrigerant Charging ............................................... 18
OPERATING SEQUENCE ......................................... 18
Heating Mode .......................................................... 18
Cooling Mode .......................................................... 19
Fan Mode ................................................................ 19
REPLACEMENT PARTS ............................................ 19
EQUIPMENT MAINTENANCE ................................... 19
Cleaning of Heat Exchanger ................................... 20
Cleaning of Burners ................................................. 20
COMPONENT FUNCTIONS ...................................... 21
TROUbLESHOOTING ............................................... 21
FIGURES & TAbLES ................................................. 22
Figure 9. Unit Dimensions .................................... 22
Table 7. Center of Gravity & Shipping Weights ..... 22
Airflow Information ................................................... 23
Table 8. Nominal Airflow Rates & Temp Rises ..... 23
Gas Information ....................................................... 24
Table 9. Gas Pipe Capacities ............................... 24
Table 10. Gas Flow Rates .................................... 24
Figure 10. Unit Gas Valve Label ........................... 25
Electrical Data & Diagrams ..................................... 26
Table 11. Electrical Data ....................................... 26
Figure 11. Wiring Diagram (ECM Motor) .............. 27
Figure 12. Wiring Diagram (PSC Motor) .............. 28
Charging Tables & Charts ....................................... 29
Table 12. Charging Table for 2 Ton Units .............. 29
Table 13. Charging Table for 2.5 Ton Units ........... 29
Table 14. Charging Table for 3 Ton Units .............. 30
Table 15. Charging Table for 3.5 Ton Units ........... 30
Table 16. Charging Table for 4 Ton Units .............. 31
Figure 13. Charging Chart for 5 Ton Units ............ 31
INSTALLATION/PERFORMANCE CHECKLIST ....... 32
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