Economizer Operation; Figure 2.33 Supply Air Sensor; Figure 2.34 Economizer Setup - Bard FUSION-TEC HR58APA Installation Support Materials

3. Press UP or DOWN keys to scroll to I/O Config;
press ENTER key.
4. Press UP or DOWN keys to scroll to Supply Air
Sensor (C6); press ENTER key.
5. Reference the Value to see the input of the sensor
(see Figure 2.33).
6. To apply an offset, press ENTER key to scroll to
Offset.
7. Press UP or DOWN keys to change to the desired
value.
8. Press ENTER key to save the value.
FIGURE 2.33
Supply Air Sensor

Economizer Operation

The economizer has four types of operation. The first
mode is "None" where the economizer is never utilized.
The second mode is "Dry Bulb Only" where the outdoor
temperature is the only consideration for economizer
use on a cooling call. The third mode is "Temperature
and Humidity" where the outdoor temperature and
humidity are considered for economizer use on a
cooling call. The fourth mode is "Enthalpy" where the
outdoor temperature, humidity and calculated dew
point are considered for economizer operation on a
cooling call.
To change the economizer type:
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 System Config;
press ENTER key.
4. Press UP or DOWN keys to scroll to Economizer
Setup (A2); press ENTER key.
5. Press ENTER key to scroll to Type (see Figure
2.34).
6. Press UP or DOWN keys to change the Type
desired value to None, Dry Bulb, TempHum or
Enthalpy.
7. Press ENTER key to save the value and scroll to
the next parameter.
FIGURE 2.34
Economizer Setup
NOTE: The following parameters are for the
temperature consideration for economizer use.
Applies to Dry Bulb, TempHum and Enthalpy
type.
8. The cursor should now be on the Outdoor Set
parameter.
9. Press UP or DOWN keys to change the parameter
to the desired value.
10. Press ENTER key to save the value and scroll to
the next parameter.
11. The cursor should now be on Off Diff parameter.
12. Press UP or DOWN keys to change the parameter
to the desired value.
13. Press ENTER key to save the value and move to
the next parameter.
14. The cursor is now on the Mixed FC Set parameter.
15. Press UP or DOWN keys to change the parameter
to the desired value.
16. Press ENTER key to save the value.
17. Press the DOWN key to navigate to the A3 screen.
NOTE: This screen will not display if economizer
mode is set to Dry Bulb or None. Also, the
contents of the screen will change when type
is set to Enthalpy (Figure 2.35 on page 44)
as compared to when type is set to TempHum
(Figure 2.36 on page 44). The following menu
shows the Enthalpy content which also contains
parameters that would be shown on TempHum.
18. Press ENTER key to scroll to OA Humid Set (see
Figure 2.35).
19. Press UP or DOWN keys to change the humidity
setpoint to desired value.
20. Press ENTER key to save the value and scroll to
W/O LV Set.
21. Press UP or DOWN keys to change the humidity
setpoint for stand alone mode to desired value.
22. Press ENTER key to save the value and scroll to OA
Dew Pt Set.
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