Titus Mixing Box Controls IOM - Manual (Page 9)

Mixing Box Control Installation Manual
IOM-MBC-00 08-30-04
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Figure 10. Economizer Control System Schematic
Installation
When planning the installation, allow ample clearance for
maintenance and service. Ensure the location is protected
from rain and snow. The following steps provide basic
instructions to install a damper motor.
1. Position damper motor on mixing box where
mounting is desired. Figure 11 shows possible crank
arm rotation.
2. Use the damper motor holes as guides and drill four
holes into mixing box.
3. Secure the damper motor to mixing box using four
screws. Figure 12 shows a typical damper motor to
mixing box installation.
Settings and Adjustments
Once installed, review system requirements and settings.
Then make necessary adjustments using the following
information.
1. Run motor to fully closed position and disconnect 24
Vac from terminals TR and TR1.
2. Connect minimum position potentiometer to terminals P
and P1 (T and T1 are disconnected).
3. Reconnect 24 Vac to terminals TR and TR1 and adjust
potentiometer for desired minimum position.
Note: Possible 90 degree arm rotation, based on motor
positioning.
Figure 11. Crank Arm Rotation Limits
4. When an actuator mounted minimum position
potentiometer is used and a remote potentiometer is
NOT connected in series, utilize jumper terminals P
and P1 on the minimum position potentiometer.