Economizer; Economizer Components; Actuator; Damper Blade - Bard FUSION-TEC HR58APA Installation Support Materials

Economizer

Economizer Components

Actuator

The actuator rotates up to 90° based on a 2-10v signal
sent to it by the controller. The actuator is rated at
44 lb-in and is spring return when power is lost. This
component is what opens and closes the damper blade.
To verify the output from the controller to the actuator:
1. Press MENU key to go to the Main Menu screen.
2. Press UP or DOWN keys and ENTER key to enter
USER password 2000.
3. Press UP or DOWN keys to scroll to I/O Config;
press ENTER key.
4. Press UP or DOWN keys to scroll to Damper
Override (C14); press ENTER key.
5. Reference the Damper Position for the current
output to the damper (see Figure 2.28).
6. To override the current position, press ENTER key
to scroll to Damper OV Pos.
7. Press UP or DOWN keys to change the value to the
desired output.
8. Press ENTER key to save the value and move
cursor to Override.
9. Press UP or DOWN keys to change the value from
Disabled to Enabled.
10. The Damper Position will update with the new
override value and the damper will travel to that
position.
NOTE: This override will last for 5 minutes or until the
Override is changed back to Disabled.
FIGURE 2.28
Damper Override

Damper Blade

The system utilizes three damper blades used to bring
in outdoor air and exhaust space air for economizer
operation. The damper blades are made of sheet metal
and are integrated into the equipment.

Dust Sensor

The unit has a dust sensor installed near the outdoor
air inlet. The dust sensor checks for excessive
particulates in the outdoor air, and will close the
economizer if the dust is excessive. The sensor uses a
PWM signal converted to 0-5v output to the controller.
To ensure proper performance, cleaning may be
required. Vacuuming or blowing the dust off the sensor
with forced air is recommended. Avoid inserting any
objects into the sensor.
The dust sensor can be verified by:
1. Press MENU key to go to the Main Menu screen.
2. Press UP or DOWN keys and ENTER key to enter
USER password 2000.
3. Press UP or DOWN keys to scroll to I/O Config;
press ENTER key.
4. Press UP or DOWN keys to scroll to Dust Sensor
(C8); press ENTER key.
5. Reference the Value for the current sensor reading
(see Figure 2.29).
6. To apply an offset to the current reading, press
ENTER key to scroll to Offset.
7. Press UP or DOWN keys to adjust the value to the
desired value.
8. Press ENTER key to save the value and move
cursor to next parameter.
NOTE: The sensor can be disabled if required for
troubleshooting.
9. With the cursor on the Enable parameter, press
UP or DOWN keys to change the value from ON to
OFF.
10. Press ENTER key to save.
FIGURE 2.29
Dust Sensor

Damper Switch

The economizer utilizes a magnetic switch to determine
if the damper is operating correctly. This switch will be
closed when the damper is closed and open when the
damper is open.
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