Automatic Self-Calibration; Operation - Distech Controls VA-247P Series Hardware Installation Manual

Automatic Self-Calibration

When power is applied to the actuator for the first time, self-calibration
takes place. During this process, both LEDs on the drive flash in red.
1. The stem extends until it reaches the lower mechanical stop in the
valve.
2. Then, the stem retracts until it reaches the upper mechanical stop in
the valve.
3. Self-calibration is complete. The valve and actuator move to the
position dictated by the control signal.
Manual Self-Calibration
If required, self-calibration can be triggered manually.
1. Fold out and fold back the crank handle twice within 4 seconds. See
Figure 13. Self-calibration begins.
2. The self-calibration can be stopped by folding out the crank handle
again.
Figure 13: Manual self-calibration.
3. After calibration is complete, the two stroke indicator clips can be
attached to the actuator arms. See Figure 14.
Figure 14: Stroke indicators (included).
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Operation

Figure 15: Flow direction
Observe the direction of flow when assembling the valve and
actuator.
Figure 16:
Risk of injury due to fingers being trapped or pinched. Avoid
contact with moving parts.
Risk of burns due to contact with hot surfaces. Avoid contact
with hot surfaces.