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PF-6 OPERATION
The PF-6 adjusts the air inlet opening according to the operation of the
temperature controller ventilation stages. As the temperature increases
and new stages are activated, the inlet is opened or closed accordingly.
The ventilation curve is divided into steps and the user must program a
new air inlet position for each step.
When the actuator isn't moving, a minimum opening or closing
percentage is necessay so that the actuator can start to move. This
user-defined value is called hysteresis and can be adjusted from 2 to
10%. The hysteresis prevents the actuator from moving constantly.
Figure 1 below illustrates this.
Figure 1 Programming Points for Inlet Position
Inlet opening %
100
○
○
○
○
0.4°F
Temperature
0
Step 3
Step 0
Step 1
Step 2
Set
point
Step 0 defines the initial position of the air inlet and corresponds to a
room temperature of 0.4°F below the controller set point. This normally
corresponds to the minimum ventilation cycle.
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PF-6.rev.14
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