Air Filters ................................................................6
Line Voltage ...............................................................9
Control Board ..........................................................10
Twinning ...............................................................10
Heater Kits...............................................................10
Humidifier ................................................................10
Grounding................................................................10
2
taBle oF contentS
3-speed Units .......................................................11
Figure 7. MB7 Series Dimensions ........................14
Table 4. MB7BM Airflow Data ...............................16
Table 5. MB7EM Airflow Data ...............................17
Table 6. MB7EM Airflow Settings (Heat Only) ......18
Table 7. MB7VM Airflow Settings (Cool Only) ......18
Table 8. MB7VM Airflow Data ...............................19
Table 9. MCA & MOP Data ...................................20
Figure 9. Typical T-Stat Connections ....................21
Figure 10. Single Stg. C.B. (MB7BM) ...................22
Figure 11. Single Stg. C.B. MB7(EM & VM)..........22
Figure 12. Two Stg. Fixed Sp. M.C.B. (EM) ...........23
Figure 13. Two Stg. Var. Sp. M.C.B. (VM) ..............23
Figure 14. Wiring Diagram (BM Models) ..............24
Figure 15. Wiring Diagram (EM Models) ..............25
Figure 16. Wiring Diagram (VM Models) ..............26
Table 10. MB7BM Heating Element Logic ............27
Table 11. MB7(EM & VM) Heat Element Logic .....28