Operation - Siemens OpenAir GCA Series Technical Instructions

Technical Instructions
Document No. 155-173P25
March 17, 2006

Operation

Life expectancy
Implementation of
DIP Switch Features
(GCA15x Only)
Page 8
GCA12x and GCA22x: 2-Position Control
When power is applied, the actuator coupling moves toward the open position 90°.
GCA13x: 3-Position Control
A floating control signal controls the damper actuator. The actuator's angle of rotation is
proportional to the length of time the signal is applied. A 24 Vac/dc control signal to Y1
causes the actuator coupling to rotate clockwise. A 24 Vac/dc control signal to Y2 causes
the actuator coupling to rotate counterclockwise.
With no control voltage, the damper actuator holds its position.
GCA16x and GCA15x: Modulating Control
A continuous 0 to 10 Vdc or 2 to 10 Vdc signal from a controller to wire Y operates the
damper actuator. The angle of rotation is proportional (or inverse proportional) to the
control signal. A 0 to 10 Vdc, or 2 to 10 Vdc position feedback output signal is available
between wires U and G0 (system neutral) to monitor the position of the damper actuator.
In the event of a power failure or when the operating voltage is shut off, all actuator models
will return to the 0 position.
In the event of a blockage in a damper, actuators are overload protected over the full range
to prevent damage to the actuators.
An improperly tuned loop will cause excessive repositioning that will shorten the life of the
actuator.
Counter Clockwise
Self-adapt feature
2 to 10 Vdc
Tandem Mount
Master
Figure 13. GCA15x Series.
OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator
Clockwise
Self-Adapt Off
0 to 10 Vdc
Single Mount
Slave
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