Installation
10
ACC-SVN232A-EN
Minimum Position Setting
To adjust the minimum position setting and check out the
economizer, the power must be connected.
1. Close the unit disconnect and place the zone sensor fan
selector in the fan
ON
position and the heat/cool
selector in the
OFF
position. This will place the damper
in the minimum ventilation position.
2. To adjust the minimum position setting for the
required ventilation air, use the Symbio™ service and
installation mobile app or Symbio™ 700 on-board UI
to adjust the economizer minimum position setpoint
BAS in the fresh/return air settings menu. The damper
will open to this setting each time the blower circuit is
energized.
When adjusting minimum position, the damper may
move to the new setting in several small steps. Once
the damper has remained in position for 10 - 15
seconds without movement, it can be assumed it is at
the new position.
3. Replace the filter access panel.
The damper will close when the blower circuit is
de-energized.
Dry Bulb Settings
Standard economizer dry bulb changeover is field
selectable and has a range of 50-140ºF.
Reference Enthalpy Settings
Economizer enthalpy changeover is field selectable and
has a range of 50-140ºF. The default is 60ºF. This selection
can be made using the Symbio service and installation
mobile app or Symbio™ 700 on-board UI.
Wiring Connections
Refer to main unit schematic sheet 6 for electrical
connections to Fresh air module located in return section
control box, See
.
After installation is complete, the Symbio™ 700 UC
configuration will need to be updated to enable this
installed feature. Refer to Symbio Applications Guide.
Table 1.
Precedent economizer control options
Control Option
Enable Conditions
Optional Sensors Required
Comparative Enthalpy
Outside Air Enthalpy < Return Air Enthalpy – Econ Enthalpy
Offset AND Outside Air Temperature < Economizer Drybulb
Setpoint – Econ DryBulb Offset
Outdoor Air Temperature Sensor
Outdoor Air Humidity Sensor
Return Air Temperature Sensor
Return Air Humidity Sensor
Reference Enthalpy
Outside Air Enthalpy < Reference Enthalpy Setpoint – Econ
Enthalpy Offset AND Outside Air Temperature < Economizer
Drybulb Setpoint - Econ DryBulb Offset
Outdoor Air Temperature Sensor
Outdoor Air Humidity Sensor
Dry Bulb
OA Temp < [Economizer Outdoor Air Enable Setpoint BAS -
Economizer Dry Bulb Enable Offset]
Outdoor Air Temperature Sensor
Differential Dry Bulb
OA Temp < RA Temp - Economizer Dry Bulb Enable Offset -
Economizer Dry Bulb Disable Return Air Offset
Outdoor Air Temperature Sensor
Return Air Temperature Sensor
Figure 17.
Fresh air options module location
Fresh air options
module access (D cabinet)
Fresh air options
module access (B and C cabinet)
Содержание FIAECON003 Series
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