System Operation
Andover Controls Corporation 6-3
TOC
• The green STATUS LED indicates the current status of the fan, as
determined by the fan’s differential pressure sensor. If the Status
LED is ON, then the fan is ON.
• The amber FAIL LED indicates that there is a problem with the
equipment. Either the equipment didn’t respond in time during a
smoke control situation, or it failed the weekly self-test.
• The Override switch provides for manual control of the equipment. It
allows the fire fighting personnel to override the automatic smoke
control (AUTO) and either force the fan ON or OFF. This switch is
functional only after the Master Key has been turned ON. This switch
has the highest control priority in the system.
Damper Overrides and Indicators
Each damper will be provided with Override capabilities, an OPEN
indicator, a CLOSED indicator, and a FAIL indicator on the FSCS.
VAV terminals that serve a particular area or zone may be grouped
together and all use the same set of indicators and the same override
switch.
Figure 6-2 shows an example of the FSCS controls for a damper.
Figure 6-2. Damper Controls
• The green OPEN LED indicates if the damper is open, as determined
by one of the end-limit switches on the damper.
• The yellow CLOSED LED indicates if the damper is closed, as
determined by the other end-limit switch on the damper.
• The amber Fail LED indicates that there is a problem with the
equipment. Either the equipment didn’t respond in time during a
smoke control situation, or it failed the weekly self-test.
• The Override switch provides for manual control of the equipment. It
allows the fire fighting personnel to override the automatic smoke
control (AUTO) and either force the damper OPEN or CLOSED.
This switch is functional only after the Master Key has been turned
ON. This switch has the highest control priority in the system.
AHU-1 OA DAMPER
OPEN FAIL
AUTO
Equipment Name
Green OPEN LED
Override Switch
Yellow CLOSED LED
CLOSED
CLOSEDOPEN
Amber FAIL LED
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