Phason Supra-RS, Руководство пользователя

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Programming the stages
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
The Supra ’s actuator control function requires a potentiometer feedback on the
motor. Using actuator control without a potentiometer feedback can burn out the
motor.

If you are not using a potentiometer feedback, use the curtain function to
provide timers for opening and closing. For more information, read
Programming
curtain control relays
on page 81.
Programming actuators means setting the
temperature set points
,
differential
, and
position
for each
stage of the actuator. Each actuator has four stages. For each actuator you are setting up you need to
program the:

Minimum set point temperature

Minimum position

Set point temperature, differential temperature, and position for stages 1 to 4
How actuators work

While the temperature is below the
minimum set point
, the 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.
For example, you might decide to have 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
) percent.”