Chapter 3: Configuring your PEC Plus Phason
36 2009-06-15
Before calibrating actuators, make sure the limit switches are set and the cable and
counter weights can move freely.
If the calibration procedure stops after closing the first time, or fails to position
properly, the feedback signal is not connected properly. Verify that the
potentiometer wiring is correct. For more information, read
Determining correct
actuator feedback wiring
on page 82.
To calibrate actuators
1. Loosen the four screws in the PEC Plus enclosure and then gently remove the cover. Make sure
not to disconnect the ribbon cable.
2. Remove and then replace the ACTUATOR PRESENT jumper on the IN pins for the actuator
(ACT1 for actuator 1 and ACT2 for actuator 2).
The inlet opens completely, pauses, and then closes completely. If the procedure does not work
properly, read the note above.
3. Replace the cover and then tighten the four screws.
Configuring relays for curtains
Curtains are usually controlled by equipment called curtain machines. Curtains are opened and
closed to let in more air or less air, the idea being more air cools the building. Each curtain machine
you connect requires two relays: one for opening the curtain, and one for closing the curtain.
Use the
Relay configuration worksheet on page 88 when configuring relays.
Some curtain machines use a feedback potentiometer to indicate curtain position. If
your curtain machine has a potentiometer, configure it as an actuator.
The relays must be side-by-side pairs. In other words, Relay 1 and 2, Relay 3 and 4,
or Relay 5 and 6. The first relay will be the “open relay”; the second relay will be the
“close relay”.
You only need to configure one of the relay pairs. For example, if you configure
relay 4 for curtain control, the control automatically configures relay 3.
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