2
TABLE OF CONTENTS
IMPORTANT SAFETY INFORMATION ......................... 3
REQUIREMENTS & CODES ......................................... 3
GENERAL INFORMATION ............................................ 4
Before You Install this Unit ........................................... 4
Locating the Air Handler .............................................. 4
Minimum Clearances .................................................. 4
Installation in a Garage ............................................... 4
Plenums & Air Ducts ................................................... 4
Unconditioned Spaces ............................................. 5
Air Filters.................................................................. 5
Acoustical Duct Work ............................................... 5
AIR HANDLER INSTALLATION .................................... 5
Packaging Removal..................................................... 5
Mounting Applications ................................................. 5
Upflow Installations ..................................................... 5
Downflow Installations ................................................. 5
Horizontal Installations ................................................ 5
Horizontal Left Installations: ..................................... 6
Horizontal Right Installations: .................................. 6
Circuit Breaker Cover Installation ................................ 7
Refrigerant Line Connections...................................... 7
Orifice Removal & Installation .................................. 7
Connecting the Linesets .......................................... 8
Condensate Drainage ................................................. 9
ELECTRICAL CONNECTIONS ..................................... 10
Pre-Electrical Checklist ............................................... 10
Line Voltage ................................................................. 10
Thermostat Connections ............................................. 10
Grounding ................................................................... 10
Control Board .............................................................. 10
Twinning ...................................................................... 10
Line & Low Voltage Connections ............................. 11
Heater Kits .................................................................. 11
Electronic Air Cleaner (EAC) ....................................... 11
STARTUP & ADJUSTMENTS ....................................... 11
Before You Start the Unit ............................................. 11
Air Circulation .............................................................. 11
Running the Blower Continuously ............................... 11
Turning the Blower Off ............................................. 11
System Cooling........................................................ 11
System Heating ....................................................... 11
Selecting Minimum Electric Heat Airflow ................. 11
BLOWER CONFIGURATIONS ...................................... 11
Determining Nominal System Capacity ................... 11
3-Speed Units .......................................................... 12
TROUBLESHOOTING ................................................... 12
UNIT MAINTENANCE .................................................... 12
REFRIGERANT CHARGING ......................................... 13
FIGURES & TABLES ..................................................... 14
Figure 10. B64 Series Physical Dimensions.............14
Figure 11. Air Handler Components ........................ 15
Airflow Data ................................................................. 16
Table 4. B64BM Airflow Data With Horizontal
Drain Pan...............................................................16
Table 5. B64BM Airflow Data Without Horizontal
Drain Pan...............................................................16
Electrical Data & Diagrams ......................................... 17
Table 6. Control Board Operation ................................ 17
Figure 12. Typical Thermostat Connections ............. 18
Figure 13. Low Voltage Wiring For Twinning ............ 18
Figure 14. Single Stage Control Board .................... 19
Figure 15. B64BM Wiring Diagram .......................... 20
INSTALLATION CHECKLIST ........................................ 24
