Comfort-Aire HMB**V*1E SERIES - Manual (Page 2)

2
IMPORTANT SAFETY INFORMATION .......................3
GENERAL INFORMATION ..........................................3
Requirements & Codes .............................................3
About the Air Handler ................................................3
Before You Install this Equipment ..............................4
Minimum Clearances .................................................4
Locating the Air Handler ............................................4
Operation of an Air Handler During Construction ......4
Plenums & Air Ducts .................................................5
Supply Air Connections ..........................................5
Return Air Connections ..........................................5
Acoustical Duct Work .............................................5
Air Filters ................................................................6
Unconditioned Spaces ...........................................6
Condensate Drainage ..............................................6
AIR HANDLER INSTALLATION ..................................6
Upflow Installation .....................................................6
Downflow Installation .................................................7
Horizontal Installation ................................................8
Horizontal Left Installations ....................................8
Horizontal Right Installations .................................8
Circuit Breaker Cover Installation ..............................9
ELECTRICAL CONNECTIONS ...................................9
Pre-Electrical Checklist .............................................9
Line Voltage ...............................................................9
Thermostat Connections .........................................10
Control Board ..........................................................10
Twinning ...............................................................10
Heater Kits...............................................................10
Electronic Air Cleaner..............................................11
Humidifier ................................................................11
Optional Humidistat .................................................11
Grounding................................................................11
STARTUP & ADJUSTMENTS ...................................11
Before You Start the Air Handler..............................11
Air Circulation Check ...............................................11
Running the Blower Continuously ........................11
System Cooling ....................................................11
System Heating ....................................................11
Turning the Blower Off..........................................11
Blower Configurations .............................................12
Selecting minimum Electric Heat Airflow ..............12
Determining Nominal System Capacity ...............12
3-speed Units .......................................................12
High Efficiency Units ............................................12
Selecting Basic Heating Airflow ...........................12
Selecting Basic Cooling/Heat Pump Airflow .........12
Dehumidification Options ........................................13
UNIT MAINTENANCE ................................................13
TROUBLESHOOTING ...............................................14
FIGURES & TABLES .................................................15
Figure 8. Physical Dimensions .............................14
Figure 9. HMB Series Components .....................16
Airflow Data .............................................................17
Table 4. HMB**A*1E Air Handlers ........................17
Table 5. HMB**X*1E Air Handlers ........................18
Table 6. HMB**X*1E Air Handlers (Heat Only) .....19
Table 7. HMB**V*1E Air Handlers (Cool Only) .....19
Table 8. HMB**V*1E Airflow Data ........................20
Electrical Data & Diagrams .....................................21
Table 9. HMB**A*1E, HMB**X*1E, & HMB**V*1E
MCA & MOP Data ..................................21
Figure 10. Typical T-Stat Connections ..................22
Figure 11. Single Stage Control Board
(HMB**A*1E Series) ...........................23
Figure 12. Single Stage Control Board
(HMB**X*1E, HMB**V*1E Series) ......23
Figure 13. Two Stage Fixed Speed Motor Control
Board (HMB**X*1E Series) .................24
Figure 14. Two Stage Var. Speed Motor Control
Board (HMB**V*1E) ............................24
Figure 15. Wiring Diagram (HMB**A*1E) .............25
Figure 16. Wiring Diagram (HMB**X*1E) .............26
Figure 17. Wiring Diagram (HMB**V*1E) .............27
Table 10. Heating Element Logic (HMB**A*1E) ...28
Table 11. Heat Element Logic
(HMB**X*1E & HMB**V*1E) .................29
INSTALLATION / PERFORMANCE CHECKLIST .....32
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