Andover Controls Infinity Manual page 131

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AHU2 (SCX920S)
The SCX920S named AHU2 is responsible for controlling the fans and
dampers in Air Handling Unit #2. AHU1 is used for floor2, floor3, and
floor4. Since AHU2 is used for HVAC and smoke control, it is a non-
dedicated controller.
Table 5-4 lists the programs that are used by the SCX920S for this
application.:
Table 5-4. AHU2 Files
NAME TYPE
OVR_Check Function
AHU_Control Program
HVAC Program
OVR_Check
Type: Function
Description: Checks the Outputs for an Override.
Code:
OverrideOn = Off
If Sfan Override then OverrideOn = On
If Rfan Override then OverrideOn = On
If OADmp Override then OverrideOn = On
If EADmp Override then OverrideOn = On
If RADmp Override then OverrideOn = On
Return
File Explanation:
This function turns ON the numeric OverrideON if any of the outputs
are overridden. The OverrideOn flag is used by the CX9200 to turn on
an Override Fault on the FSCS.
5-55
Smoke Control Programs
DESCRIPTION
Checks the Outputs for an Override.
Controls the state of the Air Handling Unit's
Fans and Dampers.
Used to Simulate an HVAC program.
Infinity Smoke Control Guide
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