Andover Controls Infinity - Controlling the Air Handling Units; AHU1 (SCX920 S) Control; OVR_Check Function for AHU1

Smoke Control Programs
5-49 Infinity Smoke Control Guide
TOC
Controlling the Air Handling Units
AHU1 (SCX920S)
The SCX920S named AHU1 is responsible for controlling the fans and
dampers in Air Handling Unit #1. AHU1 is used for floor1. Since AHU1
is used for HVAC and smoke control, it is a non-dedicated controller.
Table 5-3 lists the programs that are used by the SCX920S for this
application.:
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.
Table 5-3. AHU1 Files
NAME TYPE DESCRIPTION
OVR_Check Function Checks the Outputs for an Override.
AHU_Control Program Controls the state of the Air Handling Unit’s
Fans and Dampers.
HVAC Program Used to Simulate an HVAC program.
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