Install Instructions

OpenAir GMA Series Spring Return, 62 lb-in, Rotary, Electronic Damper Actuators Technical Instructions
Document Number 155-315P25
March 6, 2018
Siemens Industry, Inc. Page 19
Start-Up/
Commissioning,
Continued
GMA13x
Spring Return
Floating
24 Vac/dc
2. Check Spring Return:
a. Apply a control signal (24 Vac/dc) to wire 6 (violet).
Allow the actuator shaft coupling to rotate half way.
b. Disconnect wire 1 (red).
The spring returns the actuator shaft coupling to the fail "0" position.
c. Connect wire 1 (red).
The actuator shaft coupling begins to move.
3. Check Feedback:
a. Set the DMM dial to ohms.
b. Connect wires P1 and P2 to the DMM.
The DMM should indicate a resistive value.
c. Apply a control signal (24 Vac/dc) to wire 6 (violet).
The reading of the DMM should increase.
d. Stop the control signal to wire 6 (violet).
e. Connect wires P2 and P3 to the DMM.
The DMM should indicate a resistive value.
f. Apply a control signal (24 Vac/dc) to wire 7 (orange).
The reading of the DMM should increase.
4. Check the Auxiliary Switch A:
a. Set the DMM dial to ohms (resistance) or continuity check.
b. Connect wires S1 and S3 to the DMM.
The DMM should indicate an open circuit or no resistance.
c. Apply a control signal (24 Vac/dc) to wire 6 (violet).
The DMM should indicate contact closure as the actuator shaft coupling
reaches the setting of switch A.
d. Stop the control signal to wire 6 (violet).
e. Connect wires S1 and S2 to the DMM.
The DMM should indicate an open circuit or no resistance.
f. Apply a control signal (24 Vac/dc) to wire 7 (orange).
The DMM should indicate contact closure as the actuator shaft coupling
reaches the setting of switch A.
5. Check the Auxiliary Switch B:
a. Set the DMM dial to ohms (resistance) or continuity check.
b. Connect wires S4 and S6 to the DMM.
The DMM should indicate an open circuit or no resistance.
c. Apply a control signal (24 Vac/dc) to wire 6 (violet).
The DMM should indicate contact closure as the actuator shaft coupling reaches
the setting of switch B.
d. Stop the control signal to wire 6 (violet).
e. Connect wires S4 and S5 to the DMM.
The DMM should indicate an open circuit or no resistance.
f. Apply a control signal (24 Vac/dc) to wire 7 (orange).
The DMM should indicate contact closure as the actuator shaft coupling reaches
the setting of switch B.