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
Heating Load ................................................................. 5
COMBUSTION AIR & VENTING REQUIREMENTS ....... 6
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
Horizontal to Downflow Conversion ............................... 9
Condensate Drain .......................................................... 9
ELECTRICAL WIRING .................................................... 10
Pre-Electrical Checklist .................................................. 10
Grounding ...................................................................... 11
Line Voltage ................................................................... 11
Thermostat / Low Voltage Connections ......................... 11
Checking Heat Anticipator Settings ........................... 11
Blower Speed ................................................................ 12
5-Speed ECM 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
START UP & ADJUSTMENTS ........................................ 15
Pre-Start Check List ...................................................... 15
Start-Up Procedure ........................................................ 15
Air Circulation ............................................................. 15
System Cooling .......................................................... 15
System Heating .......................................................... 16
Verifying & Adjusting Temperature Rise ........................ 16
Verifying & Adjusting Firing Rate ................................... 16
Manifold Pressure Adjustment ....................................... 16
Verifying Burner Operation ............................................ 17
OPERATING SEQUENCE ............................................... 17
Heating Mode ................................................................ 17
Cooling Mode ................................................................ 18
Fan Mode ...................................................................... 18
REPLACEMENT PARTS ................................................. 18
EQUIPMENT MAINTENANCE ......................................... 18
Cleaning of Heat Exchanger .......................................... 19
Cleaning of Burners ....................................................... 19
COMPONENT FUNCTIONS ............................................ 20
TROUBLESHOOTING ..................................................... 20
FIGURES & TABLES ....................................................... 21
Figure 9. Unit Dimensions .......................................... 21
Table 7. Center of Gravity & Unit Shipping Weights .. 21
Airflow Data ................................................................... 22
Table 8. Nominal Airflow Rates & Temperature
Gas Information ............................................................. 24
Table 9. Gas Pipe Capaacities .................................. 24
Table 10. Gas Flow Rates ......................................... 24
Figure 10. Gas Valve Label ....................................... 25
Wiring Diagram & Electrical Data .................................. 26
Figure 11. Wiring Diagram for 208/230V / 60 Hz Unit
Table 11. Electrical Data. ........................................... 27
REFRIGERANT CHARGING ........................................... 27
Application Notes & Charging Charts ............................ 27
Table 12. Charging Table for 2 Ton Models .............. 28
Table 13. Charging Table for 2.5 Ton Models ........... 28
Table 14. Charging Table for 3 Ton Models .............. 29
Table 15. Charging Table for 3.5 Ton Models ........... 29
Table 16. Charging Table for 4 Ton Models .............. 30
Figure 12. Charging Chart for 5 Ton Models ............. 30
INSTALLATION CHECKLIST .......................................... 32
Rises (° F) .................................................... 22
with ECM Motor ........................................ 26
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