Manual 2100-670B
Page
24 of 33
6. Press UP or DOWN keys to adjust the time delay.
7. Press ENTER key to scroll to
Two Count Del
.
8. Press UP or DOWN keys to adjust the delay value.
9. Press ENTER key to save.
10. Press the ESCAPE key several times to return to
Main Menu screen.
Economizer
Economizer Components
Actuator
The actuator rotates up to 90° based on a 0-10v 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
TECHNICIAN password 1313.
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 32).
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
.
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
TECHNICIAN password 1313.
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 33).
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 32
Damper Override
FIGURE 33
Dust Sensor
