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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
Vent Termination ..........................................................6
CIRCULATING AIR SUPPLY ..................................... 7
Air Ducts .......................................................................7
Air Filter Requirements ................................................7
Unconditioned Spaces .................................................7
Acoustical Duct Work ...................................................7
UNIT INSTALLATION ................................................ 8
Packaging Removal .....................................................8
Rigging & Hoisting ........................................................8
Clearances to Combustible Materials ..........................8
Ground Level ................................................................8
Condensate Drain (Air Conditioning) ...........................8
ELECTRICAL WIRING............................................... 9
Pre-Electrical Checklist ................................................9
Grounding .....................................................................9
Line Voltage .................................................................9
Thermostat / Low Voltage Connections .......................10
2-Stage Heat / 1-Stage Cool Thermostat .................10
Checking Heat Anticipator Settings ..........................10
Cooling Configurations .................................................10
Heating Configurations .................................................10
Blower Speed ...............................................................10
Configuring the Fixed Speed Blower ........................10
Selecting Cooling Airflow ..........................................11
Selecting Heating Airflow ..........................................11
Dehumidification Options .............................................11
Optional Furnace Control Board Connections .............11
Electronic Air Cleaner ...............................................11
Humidifier..................................................................11
GAS SUPPLY & PIPING ............................................ 12
Leak Check ..................................................................12
High Altitude Conversion - Natural Gas .......................13
LP / Propane Gas Conversion .....................................13
START UP & ADJUSTMENTS .................................. 15
Pre-Start Check List .....................................................15
Start-Up Procedure ......................................................15
Air Circulation ...........................................................15
Lighting the Appliance ..............................................15
Verifying System Heating ..........................................16
Verifying & Adjusting Temperature Rise ....................16
Verifying the Firing Rate of the Appliance.................16
Measuring the Manifold Pressure .............................17
Adjusting the Manifold Pressure ...............................17
Removing the Manometer/Pressure Gauge .............17
Verifying Burner Operation .......................................18
Verifying System Cooling ..........................................18
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TABLE OF CONTENTS
OPERATING SEQUENCE ......................................... 19
Heating Mode ...............................................................19
Thaw Cycle Start Up / Shutdown .................................20
Blocked Vent / Condensate Disposal Shut Down ........20
Cooling Mode - Single Stage Operation ......................20
De-Humidification Control ............................................20
Fan Mode .....................................................................20
COMPONENT FUNCTIONS ...................................... 20
EQUIPMENT MAINTENANCE................................... 21
Heat Exchanger & Burner Maintenance ......................21
Cleaning of Burners .....................................................22
TROUBLESHOOTING ............................................... 22
Cooling Mode ...............................................................22
Heating Mode ...............................................................22
FIGURES & TABLES ................................................. 23
Figure 7. Unit Dimensions .........................................23
Table 7. Center of Gravity & Shipping Weights .........23
Airflow Information.....................................................24
Table 8. Cooling Airflow Settings...............................24
Table 9. Heating Airflow Settings ..............................24
Table 10. Blower Performance - 2 & 2.5 Ton .............25
Table 11. Blower Performance - 3 Ton ......................26
Table 12. Blower Performance - 3.5 Ton ...................27
Table 13. Blower Performance - 4 & 5 Ton ................28
Gas Information ..........................................................29
Table 14. Gas Pipe Capaacities ................................29
Table 15. Gas Flow Rates .........................................29
Figure 8. Gas Valve Label .........................................30
Electrical Data & Diagrams........................................31
Table 16. Electrical Data. ..........................................31
Table 17. Copper Wire Size ......................................31
Table 18. Thermostat Wire Gauge ............................31
Figure 9. Two Stage Heating / Single Stage
Cooling Configuration ...............................................31
Figure 10. Fixed Speed Motor Control Board ...........31
Figure 11. Ignition Control Board - 624809 ...............31
Figure 12. Wiring Diagram ........................................32
Charging Charts .........................................................33
Figure 13. Charging Chart for 2 Ton Units ................33
Figure 14. Charging Chart for 2.5 Ton Units .............33
Figure 15. Charging Chart for 3 Ton Units ................34
Figure 16. Charging Chart for 3.5 Ton Units .............34
Figure 17. Charging Chart for 4 Ton Units ................35
Figure 18. Charging Chart for 5 Ton Units ................35
DRAIN & VENT SYSTEM .......................................... 36
Vent Pipe & Drain Hose Assembly ...............................36
Vertical Drain Pit Method .............................................36
Preparing the pit .......................................................37
Percolation Test (Optional) ........................................37
Vertical Drain Pipe Installation ..................................37
Horizontal Drain Trench Method ..................................37
Preparing the Trench ................................................38
Horizontal Drain Pipe Installation ..............................38
Completing the Vent Installation ..................................38
REPLACEMENT PARTS............................................ 38
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