Programming instructions
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Programming actuators means setting the temperature set points, differential, and position for each
stage of the actuator. For each actuator, you need to program:
Minimum set point temperature
Minimum position
Set point temperature, differential temperature, and position for stages 1 to 4
How actuators work
When the temperature is below the minimum set point, the inlet/actuator is closed.
When the temperature rises to the minimum set point, the actuator moves to the minimum
position.
As the temperature rises, the actuator has four stages it moves through until it reaches its
maximum open position. This method lets you gradually open inlets instead of fully opening
them when the temperature rises above a single set point.
Example
You want the actuator open to 40 percent at stage 1, 60 percent at stage 2, 80 percent at stage 3, and
100 percent at stage 4. However, you do not want the actuator to open directly to 40 percent. That is
why there are two temperature settings for each stage. The first setting is the stage set point. This is
where the actuator starts opening. The second setting is the differential. This is where the actuator
reaches the stage position.
In other words, "When the temperature is here (stage set point), I want the actuator to start opening.
When the temperature reaches here (stage differential), I want the actuator to be at this position
(stage position)."