4-16
• Damper Monitor Switches. The switches used to monitor the damper
position are typically connected to either an IAM or MZAM. Each damper
uses two switches, one switch monitors the OPEN position of the damper
and the other monitors the CLOSED position.
Program the appropriate device type (IAM, MAZAM, or MBZAM) and
then assign a point type of DAMPER to each device. When defining
custom labels for damper monitor switches, make sure to use descriptive
labels, such as “EXH DAMPER1 OPEN.”
Use the CC Tab in the PC Programmer to program the Custom Control
equations as shown below. Note that these equations only show a single damper
being controlled. Copy this equation, changing the damper points as required to
account for all of the building’s dampers.
• Equation 1. This equation monitors the General Alarm List (L1). If any
point within this list activates, the Hold ON Output Qualifier executes,
turning off the relays for the supply and exhaust fans.
• Equation 2. If any point within List L1 (General Alarm List) activates
AND the open damper monitor switch is not ON (i.e., the damper is already
closed), the output executes, turning on the damper motor relay and closing
the damper.
General Alarm Shutdown for Fans and Dampers, Continued
Step 2. Program Point Types
and Custom Labels for
Damper Monitor Switches and
Relays (continued)
Step 3. Custom Control
Equations
Equation 2
Equation 1
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