Siemens OpenAir GEB141.1P Owner's manual

OpenAir™
Technical Instructions
Document No. A6V12029156
December 16, 2021
GEB Series Enhanced Rotary
Non-spring Return Damper Actuators
Siemens Industry, Inc.
Description
The OpenAir direct-coupled, 24 Vac/Vdc, non-spring return electronic actuator
is designed for modulating and combined on/off and floating control of building
HVAC dampers.
Features
•Brushless motor technology with stall protection
•Unique self-centering shaft coupling
•Manual override
•177 lb-in (20 Nm) torque
•5° preload as shipped from factory
•Mechanical adjustable span between 0 and 90 degrees
•Operating voltage 24 Vac/Vdc; or 100 to 240 Vac
•Models with independently adjustable, dual auxiliary switches available
•Built-in 1/2-inch conduit connection
•UL and cUL listed, CE certified
Application
Used in constant or variable air volume installations for the control of HVAC dampers
requiring up to 177 lb-in (20 Nm) torque.
Warning/Caution Notations
WARNING:
Personal injury or loss of life may occur if you do not follow a
procedure as specified.
CAUTION:
Equipment damage may occur if you do not follow a
procedure as specified.

Technical Instructions OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators
Document Number A6V12029156
December 16, 2021
Page 2 Siemens Industry, Inc.
Product Numbers
Table 1.
Product
Number
Operating
Voltage
Control
Cable
Built-in Control
Options
24 Vac/Vdc ±20%
100 to 240 Vac
Modulating (0 to 10 Vdc)
On/Off & Floating
Plenum
Standard
Position Feedback
Feedback Potentiometer
Dual Auxiliary Switches
Offset and Span
Input Signal Selectable 0 –10 Vdc or 2-10 Vdc
GEB141.1P
●
–
–
●
●
–
–
–
–
–
–
GEB141.1U
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–
–
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–
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–
–
–
–
–
GEB142.1U
●
–
–
●
–
●
–
●
–
–
–
GEB146.1U
●
–
–
●
–
●
–
–
●
–
–
GEB161.1P
●
–
●
–
●
–
●
–
–
–
●
GEB161.1U
●
–
●
–
–
●
●
–
–
–
●
GEB164.1U
●
–
●
–
–
●
●
–
●
●
●
GEB166.1U
●
–
●
–
–
●
●
–
●
–
●
GEB341.1U
–
●
–
–
–
●
–
–
–
–
–
GEB361.1U
–
●
●
–
–
●
●
–
–
–
●
Specifications
Power Supply
Operating voltage 24 Vac 20%; 24 Vdc 20%
100 to 240 Vac 10%
Frequency 50/60 Hz
Power consumption
Running: Holding:
GEB14x 2.3 VA/1.1W 0.5 W
GEB16x 2.5 VA/1.2W 0.65 W
GEB 34x 4 VA/1.6W 0.9W
GEB36x 3.4 VA/1.3W 0.6W
Equipment rating Class 2, in accordance with UL/CSA
Class III per EN 60730
Control Signal
Input signal (wires 8-2) GEB16x
Voltage-input 0 (2) to 10 Vdc (max. 35 Vdc)
Input resistance >100K ohms
Feedback signal
Position output signal (wires 9-2) GEB16x
Voltage-output 0 to 10 Vdc
Maximum output current 1 mA
Function
Running torque 177 lb-in (20 Nm)
Maximum torque 310 lb-in (35 Nm)
Nominal runtime for 90° opening or closing 150 seconds
Nominal angle of rotation 90°
Maximum angular rotation 95° +/- 2°

OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators Technical Instructions
Document Number A6V12029156
December 16, 2021
Siemens Industry, Inc. Page 3
Mounting
Shaft size 1/4 to 3/4-inch (6.4 to 20.5 mm) dia.
1/4 to 1/2-inch (6.4 to 13 mm) square
Minimum shaft length 3/4-inch (20 mm)
Housing
Enclosure NEMA 1
IP54 according to EN 60 529
Material Die cast aluminum alloy
Gear lubrication Silicone free
Ambient conditions
Ambient temperature
Operation -25°F to 130°F (-32°C to 55°C)
Storage and transport -40°F to 158°F (-40°C to 70°C)
Ambient humidity (non-condensing) 95% rh
Agency certification
UL UL60730
cUL CAN/CSA E60730
Conformity
Low voltage directive 2006/95/EC
Product safety: Automatic electrical controls EN 60 730-2-14
for household and similar use (Type 1)
Electromagnetic compatibility (EMC) 2004/108/EC
Emissions for all models EN61000-6-3
Auxiliary features
Control signal adjustment
Offset (start point) Between 0 to 5 Vdc
Span Between 2 to 30 Vdc
Dual auxiliary switches
AC rating 24 to 250 Vac
AC 6A resistive,
AC 2A general purpose
DC rating 12 to 30 Vdc
DC 2A
Switch Range
Switch A 0 to 90° with 5° intervals
Recommended range usage 0 to 45°
Factory setting 5°
Switch B 0 to 90° with 5° intervals
Recommended range usage 45 to 90°
Factory setting 85°
Switching hysteresis 2°
Feedback potentiometer (GEB 142.1U) 0 to 1000 ohm <10 mA
Voltage UL/cUL-Class 2 (SELV/PELV for CE)

Technical Instructions OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators
Document Number A6V12029156
December 16, 2021
Page 4 Siemens Industry, Inc.
Auxiliary features,
Continued
WARNING:
Apply only AC line voltage or only UL-Class 2 voltage (SELV for CE conformance) to
the switching outputs of both auxiliary switches A and B. Mixed operation is not
permissible. See Wiring for details.
NOTE: With plenum cables, only UL-Class 2 (SELV for CE) is permitted).
Miscellaneous
Pre-cabled connection 18 AWG
Cable length 3 feet (0.9m) length
Life cycle Designed for 100,000 full stroke cycles
at rated torque and temperature
Dimensions: Inches (mm) 7.56 H 3.23 W 2.36 D
(192 H 82 W 60 D)
Weight Non-Switch Models: 2.4 lbs. (1 kg)
Switch Models: 2.9 lbs. (1.3 kg)
Country of Origin USA
Actuator
Components
Figure 1. Non-Spring Return Actuator
Components.
Legend
1. Actuator housing
2. Positioning scale for angle of
rotation
3. DIP switches and cover
4. Span adjustment
5. Offset (start point) adjustment
6. Mounting bracket
7. Connection cable for power
and control signals
8. Connection cable for auxiliary
switches or feedback
potentiometer
9. Manual override
10. Auxiliary switches A & B
11. Position indicator
12. Self centering shaft adapter
13. 1/2-inch NSPT conduit
connection
14. Shaft adapter locking clip
15. Position indicator adapter

OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators Technical Instructions
Document Number A6V12029156
December 16, 2021
Siemens Industry, Inc. Page 5
Accessories
NOTE: The auxiliary switches, control signal adjustment, and feedback potentiometer
cannot be added in the field. Order the product number that includes the option(s).
4614Z19
Figure 2. Floor /Frame Mount Kit.
ASK71.11: For in-the-air-stream
applications: Anywhere a foot-mounted
actuator can be mounted. Can also be
directly mounted to a damper frame with
louvers and vents and in applications where
use of the floor mount is not possible.
Kit contains:
•Crank arm to change the angular
rotation into a linear stroke.
•Support bearing ring to minimize side
loading on the actuator’s output
bearing.
•Mounting bracket.
•Required mounting fasteners.
4614Z16
Figure 3. Rotary to Linear Crank Arm Kit.
ASK71.13: Allows a direct-coupled actuator
to provide an auxiliary linear drive. Can be
used to simultaneously drive a set of
opposing or adjacent dampers with a single
actuator.
Kit contains:
•Crank arm to attach to the splined
hub of the shaft adapter.
•Mounting fasteners.
4614Z18
Figure 4. Rotary to Linear Crank Arm Kit
with Mounting Bracket.
ASK71.14: Allows economical mounting of
an OpenAir actuator to a variety of surfaces.
Should be used in applications where the
actuator can be rigid-surface mounted and a
linear stroke output is required.
Kit contains:
•Crank arm to attach to the splined
hub of the shaft adapter.
•Mounting bracket.
•Required mounting fasteners.
Figure 5. NEMA 3RWeather Shield.
ASK75.3U: GEB actuators are UL listed to
meet NEMA 3R requirements (a degree of
protection against rain, sleet, snow, and
damage from external ice formation) when
installed with ASK75.3U Weather Shield and
outdoor-rated conduit fittings in the vertical
position.

Technical Instructions OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators
Document Number A6V12029156
December 16, 2021
Page 6 Siemens Industry, Inc.
Figure 6. NEMA Type 4X
Weather Shield.
ASK75.7U: GEB Actuators are UL listed to
meet NEMA Type 4X requirements (a degree
of protection against falling dirt, rain, sleet,
snow, windblown dust, splashing water, hose-
directed water, corrosion, and damage from
external ice formation) when installed with an
ASK75.7U Weather Shield and outdoor-rated
conduit fittings. This weather shield may be
mounted in any orientation.
For dimensions, see Figure 22.
Service Parts
985-094P10
Position indicators (10/pkg.)
985-092
Anti-rotation (mounting) bracket.
Figure 7. Miscellaneous Service Parts.
Operation
GEB16x
Apply a 0 (2) to 10 Vdc control signal between wire 8 (Y) and wire 2 (G0) to operate the
damper actuator. The angle of rotation is proportional to the control signal. A 0 to 10 Vdc
position feedback output signal is available between wire 9 (U) and wire 2 (G0) to monitor the
position of the damper motor.
In the event of a power failure, the actuator holds its position. In the event that only the control
signal is lost, the actuator returns to the "0" position.
GEB14x
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 control signal to wire 6 (Y1)
causes the actuator coupling to rotate clockwise. A 24 Vac control signal to wire 7 (Y2)
causes the actuator coupling to rotate counterclockwise.
To reverse the direction of rotation, wires 6 (Y1) and 7 (Y2) can be interchanged.
With no control voltage, the damper actuator holds its position.
Overload protection
In the event of a blockage in the damper, the actuator is overload protected over the full range
to prevent damage to the actuator.
Life expectancy
An improperly tuned loop will cause excessive repositioning that will shorten the life of the
actuator.

OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators Technical Instructions
Document Number A6V12029156
December 16, 2021
Siemens Industry, Inc. Page 7
Sizing
The type of actuator required depends on several factors:
1. Obtain damper torque ratings (ft-lb/ft2or Nm/m2) from the damper manufacturer.
2. Determine the area of the damper.
3. Calculate the total torque required to move the damper:
Total Torque =
SF AreaDamperRatingTorque 1

1 Safety Factor: When calculating the total torque required, a safety factor should be included
for unaccountable variables such as slight misalignments, aging of the damper, and so on. A
suggested safety factor is 0.80.
Mounting and
Installation
•Place the actuator on the damper shaft so that the front of the actuator is accessible.
(The label and the manual override button are on the front side.)
•The minimum damper drive shaft is 3/4-inches (20mm). The shaft length determines
whether the shaft adapter will be mounted on the front or back of the actuator.
•See Specifications for minimum and maximum damper shaft dimensions.
•Set auxiliary switches, DIP switches, and Offset/Span as required by your
application. (See following sections for details.)
•The position indicator can be mounted to show either the clockwise or
counterclockwise 0 to 90 scale.
•A mounting bracket is included with the actuator.
•The shaft adapter and mounting parts are shipped in a separate container with the
actuator.
•The actuator is shipped from the factory with a 5° pre-load to ensure tight damper
close off.
•Detailed mounting instructions are included with each actuator.
Manual Override
To move the damper blades
and lock the position without
power present:
1. Hold down the PUSH
button.
2. Make adjustments to the
damper position.
3. Release the PUSH button.
Once power is restored, the
actuator returns to automated
control.
Figure 8. Manual Override.

Technical Instructions OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators
Document Number A6V12029156
December 16, 2021
Page 8 Siemens Industry, Inc.
Mechanical Range
Adjustment
The angular rotation is adjustable between 0
and 90° at 5-degree intervals. The range of
shaft movement is limited by mounting the shaft
adapter:
1. Loosen the shaft adapter from the damper
shaft and remove the actuator from the
damper shaft.
2. Remove the clip and shaft adapter from the
actuator.
Figure 9.
Figure 10.
Figure 11
Figure 12.
3. Return the actuator gear train to the 0position using the steps that follow for the
clockwise or counterclockwise damper shaft rotation.
Clockwise to open:
a. Insert the shaft adapter to the right as close as possible to the raised stop. See
Figure 10.
b. Hold down the PUSH button and rotate the shaft adapter to the left until it stops.
See Figure 11.
c. Release the PUSH button.
d. If the shaft adapter is not resting against the left raised stop, remove the adapter
and insert it against the left stop.
e. Place the position indicator to the 0position on the outside scale.
See Figure 12.
Counterclockwise to open:
a. Insert the shaft adapter to the left as close as possible to the raised stop.
b. Hold down the PUSH button and rotate the shaft adapter to the right until it
stops.
c. Release the PUSH button.
d. If the shaft adapter is not resting against the right raised stop, remove the
adapter and insert it against the right stop.
e. Place the position indicator to 0on the inside scale.
4. Determine the angle of rotation for the damper blade shaft. Subtract that amount
from 90°.
5. Remove the shaft adapter and insert it with the position indicator pointing to the mark
on the scale calculated in the previous step. See Figure 12.
6. Attach the clip.
7. Rotate the damper blade shaft to its 0position.
8. Return the actuator to the damper shaft and tighten the shaft adapter to the damper
shaft.

OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators Technical Instructions
Document Number A6V12029156
December 16, 2021
Siemens Industry, Inc. Page 9
Control signal
adjustment
GEB164.1U
(Offset and Span)
The offset (start point) and span of the control signal can be adjusted. The offset, Uo, can
be adjusted between 0 to 5 Vdc. The span, U, can be adjusted between 2 to 30 Vdc.
Ys Mechanical positioning range (100% = angle of rotation 90°)
Yu Control signal
Uo Offset (start point)
U Span
NOTE: When the mechanical limitation of the angle of rotation and
self-adaptive function are ON, 100% does not equal 90°.
1. Uo = 0V, U = 2V: The minimum working range for
Ys = 100%
2. Uo = 5V, U = 30V: The maximum working range for
Ys = 100%
3. Uo = 0V, U = 30V: Factory setting
Factory setting:
30V span
0 offset
Figure 13. The Minimum and Maximum Control Signal Adjustment.
Example:
Open the actuator from 0 to 50% (45°) using a control signal of:
Umin= 2V to Umax= 10V.
Calculating the valve of U:
V16
50 2)(10x100 %inrotationofangleWorking min)Umax(U%][100
U=
−
=
−
=

Technical Instructions OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators
Document Number A6V12029156
December 16, 2021
Page 10 Siemens Industry, Inc.
Control Signal
Adjustment,
Continued
Uo = 2; U = 16V
Umin = minimum control signal
Umax = maximum control signal
Figure 14. Example.
Dual auxiliary switch
GEB164.1U,
GEB146.1U
←Actuator scale: Clockwise
Adjustment range for switches A and B:
Setting interval: 5°
Switching hysteresis: 2°
←Actuator Scale: counterclockwise
To change the settings of A and B:
NOTE: The scale is only valid when the
actuator is in the 0position on
clockwise motion.
•Use the adjustment tool provided
with the actuator to turn the
switch adjustment dials to the
desired signal setting.
Factory setting:
Switch A 5°
Switch B 85°
Figure 15. Dual Auxiliary Switch Dials.
.
NOTE: Use the long arm of the "†" to point to the position of switch A. Use the
narrower tab on the red ring to point to the position of switch B.

OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators Technical Instructions
Document Number A6V12029156
December 16, 2021
Siemens Industry, Inc. Page 11
DIP Switch
Functionality
GEB161.1
GEB164.1
Description
Label
Description
Function
Counterclockwise
Clockwise
Rotary angle direction
Active
0
Off
Self-adaptation to
mechanical range
signal
2-10 Vdc
GEB161.1
2
0
0…10 Vdc
Selection control
signal
2-10 or 0-10 Vdc
2-10 Vdc output
GEB164.1
2
0
0...10 Vdc
output
Output Signal
2-10 or 0-10 Vdc
Output Voltage
Figure 16. DIP Switches.
Rotary direction
•The arrow direction must match the rotational direction of
the actuator.
•Factory setting:
Self-adapting
0
•Alternative switch-on/off for self-adaptation.
: ON
0: OFF
•Factory setting: 0
CAUTION:
When turning the self-adaptive feature on, or after a
software reset with the feature on, the actuator will
enter a five-minute calibration cycle as the actuator
adjusts to the rotation limits of the system.
A software reset happens after power on or may be
caused by electrostatic discharge (ESD) at levels of
2kV and above.
Positioning Control Signal: (GEB161.1)
20
•Alternative settings:
2-10 Vdc
0-10 Vdc
•Factory setting: 0-10 Vdc
Positioning Control Signal: (GEB164.1)
2…. 0….
•Alternative settings:
2…: 2-10 Vdc output voltage
0...: 0-10Vdc output voltage
Factory setting: 0

Technical Instructions OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators
Document Number A6V12029156
December 16, 2021
Page 12 Siemens Industry, Inc.
Wiring
All wiring must conform to NEC and local codes and regulations.
Use earth ground isolating step-down Class 2 transformers. Do not use autotransformers.
The maximum rating for a Class 2 step-down transformer is 100 VA. Determine the supply transformer
rating by summing the VA ratings of all actuators and all other components used. It is recommended
that one transformer power no more than 10 actuators (or 80% of its VA).
WARNING:
Mixed switch operation is not permitted to the switching outputs of both auxiliary switches
(A and B).
Either all six outputs of the dual auxiliary switches must be connected to the AC line
voltage, or all six outputs must be connected to UL-Class 2 voltage (SELV for CE
conformance).
NOTE: With Plenum cables only UL-Class 2 voltage (SELV for CE conformance) is
permitted.
WARNINGS:
Installations requiring Conformance:
•Except for the auxiliary switches (See Warning above) all wiring for actuators must
be safety extra-low voltage (SELV) or protective extra-low voltage (PELV) per
HD384.
•Use safety transformers per EN61558 with double isolation, designed for 100%
duty-cycle for supplying SELV or PELV circuits.
•Over-current protection for supply lines is maximum 10A.
CAUTION:
Do not parallel GEB13x actuators with any other type of actuator.

OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators Technical Instructions
Document Number A6V12029156
December 16, 2021
Siemens Industry, Inc. Page 13
Wire Designations Each wire has the standard symbol printed on it. See Table 2.
Figure 17. 24 Vac/Vdc
3-Position Control
GEB14x.1U/1P.
Figure 18. 24 Vac/Vdc
Modulating Control
DC 0 to 10V
GEB164.1U.
Figure 19. 24 Vac/Vdc
Continuous control 0 to 10V
GEB16x.1U/1P.
Figure 20. 100 to 240 Vac
3-position control
GEB341.1U.
Figure 21. 100 to 240 Vac
Modulating control
DC 0 to 10V
GEB361.1U.

Technical Instructions OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators
Document Number A6V12029156
December 16, 2021
Page 14 Siemens Industry, Inc.
Table 2.
Actuators
Symbol
Function
Terminal
Designations
Color
Color
Abbreviation
24 Vac
Actuator
1
Supply (SP)
G
Red
RD
2
System neutral (SN)
G0
Black
BK
6
Control signal clockwise
Y1
Violet
VT
7
Control signal counterclockwise
Y2
Orange
OG
8
0 (2) to 10 Vdc input signal
Y
Gray
GY
9
Output for 0 to 10 Vdc position indication
U
Pink
PK
100 to 240V
Actuator
3
Line (100 to 240 Vac)
L
Brown
BR
4
Neutral
N
Blue
BU
6
Control signal clockwise (GEB34..1U)
Y1
Black
BK
7
Control signal counterclockwise (GEB34..1U)
Y2
White
WH
1
System potential 24 Vdc aux. power supply
G+
Red
RD
2
System Neutral auxiliary power supply
G-
Black
BK
8
Input signal (GEB361.1U)
Y
Gray
GY
9
Output signal (GEB361.1U)
U
Pink
PK
Auxiliary
Switches
S1
Switch A Common
Q11
Gray/
red
GYRD
S2
Switch A N.C.
Q12
Gray/
blue
GYBU
S3
Switch A N.O.
Q14
Gray/
pink
GYPK
S4
Switch B Common
Q21
Black/
red
BKRD
S5
Switch B N.C.
Q22
Black/
blue
BKBU
S6
Switch B N.O.
Q24
Black/
pink
BKPK
Potentiometer
P1
Feedback Potentiometer 0 to 100% P1 - P2
a
White/
red
WHRD
P2
Feedback Potentiometer Common
b
White/
blue
WHBU
P3
Feedback Potentiometer 100 to 0% P3 - P2
c
White/
pink
WHPK

OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators Technical Instructions
Document Number A6V12029156
December 16, 2021
Siemens Industry, Inc. Page 15
Start-Up/
Commissioning
Non-spring Return
Modulating Control
(0-10 Vdc)
24 Vac
1. Check Operation:
a. Connect wires 1 (red) and 2 (black) to the 24 Vac power supply.
b. Set the Digital Multimeter (DMM) dial to Vdc for the actuator input signal.
c. Connect wires 2 (black) and 8 (gray) to a Digital Multimeter (DMM).
d. Apply a full-scale input signal (10 Vdc) to wire 8 (gray).
e. Allow the actuator shaft coupling to rotate from 0 to 90°.
f. Stop the signal to wire 8 (gray).
The shaft coupling returns to the 0position.
2. Check Feedback:
a. Set the DMM dial to Vdc.
b. Attach wires 2 (black) and 9 (pink) to the DMM.
c. Apply a full-scale input signal to wire 8 (gray).
The reading at the DMM should increase.
d. Remove the signal from wire 8 (gray).
The reading at the DMM should decrease and the actuator shaft coupling returns to the
0position.
3. 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 open circuit or no resistance.
c. Apply a full-scale input signal to wire 8 (gray).
The DMM should indicate contact closure as the actuator shaft coupling reaches the
setting of switch A.
d. Connect wires S1 and S2 to the DMM.
The DMM should indicate open circuit or no resistance.
e. Stop the signal to wire 8 (gray).
The DMM should indicate contact closure as the actuator shaft coupling reaches the
setting of switch A.
4. 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 open circuit or no resistance.
c. Apply a full-scale input signal to wire 8 (gray).
The DMM should indicate contact closure as the actuator shaft coupling reaches the
setting of switch B.
d. Connect wires S4 and S5 to the DMM.
The DMM should indicate open circuit or no resistance.
e. Stop the signal to wire 8 (gray).
The DMM should indicate contact closure as the actuator shaft coupling reaches the
setting of switch B.

Technical Instructions OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators
Document Number A6V12029156
December 16, 2021
Page 16 Siemens Industry, Inc.
Non-spring Return
Floating
24 Vac
1. Check Operation:
a. Apply a control signal (24 Vac) to wires 1 (red) and 6 (violet).
b. Allow the actuator shaft coupling to rotate from 0 to 90°.
c. Stop applying a control signal to wires 1 (red) and 6 (violet).
d. Apply a control signal (24 Vac) to wires 1 (red) and 7 (orange).
e. Allow the actuator shaft coupling to rotate from 90° to 0°.
2. 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) to wires 1 (red) and 6 (violet).
The reading of the DMM should increase.
d. Stop applying a control signal to wires 1 (red) and 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) to wires 1 (red) and 7 (orange).
The reading of the DMM should increase.
3. 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) to wires 1 (red) and 6 (violet).
The DMM should indicate contact closure as the actuator shaft coupling reaches the setting of
switch A.
d. Stop applying a control signal to wires 1 (red) and 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) to wires 1 (red) and 7 (orange).
The DMM should indicate contact closure as the actuator shaft coupling reaches the setting of
switch A.
4. 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 to wires 1 (red) and 6 (violet).
The DMM should indicate contact closure as the actuator shaft coupling reaches the setting of
switch B.
d. Stop applying a control signal to wires 1 (red) and 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) to wires 1 (red) and 7 (orange).
DMM should indicate contact closure as the actuator shaft coupling reaches setting for
switch B.

OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators Technical Instructions
Document Number A6V12029156
December 16, 2021
Siemens Industry, Inc. Page 17
Service
WARNING:
Do not open the actuator.
If the actuator is inoperative, replace the unit.
Troubleshooting
WARNING:
To avoid injury or loss of life, pay attention to any hazardous voltage
(Example: 120 Vac) when performing checks.
•Check that the wires are connected correctly.
•Check that auxiliary switches, DIP-switches, and Offset/Span are set correctly.
•Set the DMM dial to Vac and verify that the operating voltage is within range.
•If the actuator is not working, check the damper for blockage. If blocked,
remove the obstacle and cycle the actuator power off and on. The actuator
should resume normal operating mode.
Dimensions
Figure 22. Dimensions of the ASK75.7U Weather Shield in Inches (Millimeters).

Technical Instructions OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators
Document Number A6V12029156
December 16, 2021
Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as
design improvements are introduced. OpenAir is a trademark of Siemens Schweiz AG. Other product or company names mentioned herein may be
the trademarks of their respective owners. © 2021 Siemens Industry, Inc.
Siemens Industry, Inc.
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Document No. A6V12029156
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Page 18
Dimensions
Figure 23. Dimensions of the GEB Actuator and Mounting Bracket in inches (mm).