Actuator Reset - Airstream EXPERT 2V2SA User Manual

EXPERT 2V2SA
Under run open time (inlet only) — When
an inlet timer ends, it may take a few
seconds for the actuator to actually stop
moving. For this reason, the controller can
switch off the actuator's motor slightly
before its time for the actuator to reach
its exact moving time without exceeding
it. This parameter ranges from 0 to 3 sec-
onds. *This parameter is only accessible with
the installer password.

11.2.1. Actuator Reset

No reset can be made when the
outside temperature falls below a
user-defined value. This limitation
applies to both automatic & manual
resets.
Resetting the actuator's position is used to
clear accumulated time offsets caused by the
frequent openings and closings of the inlet.
The controller resets the actuator's position
at regular intervals to make sure the inlet
position is always accurate. *The actuator reset
is not required for the 0-10V chimney.
The inlet RESET pilot light flashes
while an actuator is being reset.
This reset is performed automatically accord-
ing to one of these two methods:
1. Reset the minimum position only
(Close mode)
Each time a reset is performed, the inlet
totally closes. Once the actuator's position
is reset, the inlet returns to its previous
position.
2. Reset toward the nearest position
(Open/Close mode)
If the current inlet position is higher than 50%
at the reset time, the controller fully opens
the inlet to reset the actuator's position; if
the current inlet position is lower than 50%,
the controller closes the inlet to perform the
reset. This way, the inlet never closes when
the room temperature already asks for a wide
opening.
Make sure limit switches are located
at both ends of the actuators when
using this resetting method.
EXPERT 2V2SA, rev. 10
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