Toshiba Q7 Flow Installation And Operation Manual page 36

CC connection completing the Damper Feedback requirement for ASD operation. The DRA-to-DRB
closure also provides power to the 2M coil allowing for the ASD output to be applied to the motor.
Switching SW2 to the Bypass operating mode (jumpers JPDS1 and JPDS2 are required) energizes K3.
The K3 contact closure (at PCB11) applies power to the damper motor. Once the damper-mounted
DRA-to-DRB contacts are closed (fully open damper required), the 3M coil is energized providing
utility power to the motor.
The DRA-to-DRB contacts are provided via a reversible limit switch mounted on the damper. The
switch terminates power to the damper motor once the damper is fully open or fully closed (reversible
means that only the opposite function is available once reaching the fully open or fully closed position).
Only a fully opened damper provides the DRA-to-DRB connection that is required for normal system
operation in either mode.
Figure 12. Simplified depiction of the Q7 Flow Bypass operation.
Q7 Flow Installation and Operation Manual 33
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