Siemens OpenAir GDE141.1U Owner's manual

Siemens Industry, Inc.
Technical Instructions
Document No. 155-784
October 20, 2016
OpenAir® Electronic Damper Actuators
GDE Series
Enhanced Non-spring Return Rotary
Description
The OpenAir direct coupled enhanced non-spring return rotary electric actuators are
designed for two-position/floating or modulating control of dampers.
Features
Selectable modulating control signal (0 to 10 Vdc or 2 to 10 Vdc).
24 Vac/dc compatible.
New line voltage (34x models) for 100 to 240 Vac two-position/floating control.
Integral 1/2-inch conduit connection.
Manual override.
Independently adjustable dual auxiliary switches available.
cUL and UL listed; certified
Application
These actuators are used in constant or variable air volume installations for control of
HVAC dampers requiring up to 44 lb-in (5 Nm) of torque.
Product Numbers Table 1.
Torque
Product Number
Control
Signal
Feedback
Dual
Auxiliary
Switches
Pre-Cabled
Power Supply
44 lb-in
(5 Nm)
GDE141.1U
2-position/
Floating
—
—
Standard
24 Vac/dc
GDE141.1U/B (24 pk)
—
—
Standard
GDE141.1P
—
—
Plenum
GDE141.1P/B (24 pk)
—
—
Plenum
GDE141.1Q
—
—
6-ft length
GDE142.1P*
•
—
Plenum
GDE146.1P*
—
•
Plenum
GDE341.1U
—
—
Standard
100 to 240 Vac
GDE346.1U*
•
•
Standard
GDE161.1P
Modulating
0(2) to 10 Vdc
•
—
Plenum
24 Vac/dc
GDE161.1P/B (24 pk)
•
—
Plenum
GDE161.1Q
•
—
6-ft length
GDE163.1P
•
—
Plenum
GDE164.1P*
•
•
Plenum
GDE166.1P*
•
•
Plenum
* For conduit adaption, order an ASK76.1U Conduit Adapter. See Accessories.

Technical Instructions OpenAir® GDE Enhanced Non-Spring Return Rotary Electronic Damper Actuator
Document Number 155-784
October 20, 2016
Page 2 Siemens Industry, Inc.
Specifications
Power Supply
Operating voltage (G–G0) 24 Vac/dc +/-20%
100 to 240 Vac +/-10%
Frequency 50/60 Hz
Power consumption VA Watt
GDE14x 2.5 1
GDE34x 5 1.6
GDE16x 2.1 1.2
Control signal
Input signal (Y-G0)
Voltage-input 0(2) to 10 Vdc
Input resistance >100K ohms
Feedback signal
Position output signal (U–G0)
Voltage-output 0 to 10 Vdc
Maximum output current DC 1 mA
Equipment rating
Rating Class 2 according to UL, cUL
Class III per EN60730
Auxiliary features
Control signal adjustment
Offset (start point) Between 0 to 5 Vdc
Slope (span) Between 2 and 30 Vdc
Dual auxiliary switch contact rating 4A resistive, 2A inductive
Voltage
GDE1xxx.P 24 Vac/24 Vdc
GDE3xxx.x 250 Vac
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 (GDE142.1P)
Sliding contact (P2) 0 to 5000 ohm <10 mA
Load <1 W
Voltage UL-Class 2 (SELV/PELV for CE)
<24 Vac/dc
Function
Torque 44 lb-in (5 Nm)
Runtime for 90° opening or closing 90 sec. at 60 Hz (125 sec. at 50 Hz)
Nominal angle of rotation 90°
Maximum angular rotation 95°
Mounting
Shaft size: Minimum shaft length 3/4-inch (20 mm)
Figure 1. Acceptable Shaft Sizes.

OpenAir® GDE Enhanced Non-Spring Return Rotary Electric Damper Actuator Technical Instructions
Document Number 155-784
October 20, 2016
Siemens Industry, Inc. Page 3
Specifications, continued
Housing
Enclosure NEMA Type 2
IP54 according to EN60529
(Not with cable-up mounting
orientation.)
Material Durable plastic
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 listed to UL60730
cUL certified to Canadian
Standard C22.2 No. 24-93
These devices were approved for installation in plenum areas by Underwriters
Laboratories, Inc., per UL 1995.
EN60730-1, EN60730-2-14
Miscellaneous
Pre-cabled connection 18 AWG
Standard cable length 3 ft (0.9 m)
Life cycle Designed for 100,000 full strokes and
5 million repositions at rated torque
and temperature
Actuator Dimensions, inches (mm) 6.6 L × 2.8 W × 2.4 D
(166.7 L × 71 W × 61 D)
Packaging Dimensions, inches (mm) 6.5 L × 10.3 W × 3.1 D
(165.1 L × 261.1 W × 78.7 D)
Weight 1.35 lb (0.61 kg)
(with packaging) 1.91 lb (0.87 kg)
Accessories
NOTE: The auxiliary switches cannot be added in the field. Order the product
number that includes this option. See Table 1.
Figure 2. Conduit Adapter.
ASK76.1U: Provides a connection between
the actuator and conduit for actuator
models with auxiliary switches or built-in
potentiometers. All other standard actuator
models have built-in conduit adapters.
Figure 3. Rotary-to-Linear.
ASK71.5: Allows a direct-coupled
actuator to provide an auxiliary
linear drive.

Technical Instructions OpenAir® GDE Enhanced Non-Spring Return Rotary Electronic Damper Actuator
Document Number 155-784
October 20, 2016
Page 4 Siemens Industry, Inc.
Accessories,
Continued
Figure 4. Rotary-to-Linear with Bracket.
ASK71.6: 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 needed.
Figure 5. Shaft Insert.
ASK78.3U: Shaft inserts for use
with 3/8-inch (8 to 10 mm)
diameter shafts. (10/pk).
Included in box with GDE/GLB
Series.
NOTE: Factory-installed 1/2-
inch guide must be
removed prior to
installation.
Figure 6. 1/2-inch Shaft Guide.
985-101P25: Shaft guide, 1/2-inch (25/pk).
Factory-installed with GDE/GLB Series.
Figure 7. NEMA Type 4X Weather Shield.
ASK75.7U: GDE 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 30.

OpenAir® GDE Enhanced Non-Spring Return Rotary Electric Damper Actuator Technical Instructions
Document Number 155-784
October 20, 2016
Siemens Industry, Inc. Page 5
Actuator
Components
2-Position/
Floating
Figure 8. Parts of the Actuator.
Legend
1. Base plate
2. Positioning scale for angle of rotation
3. Rotation direction adjustment
4. Conduit adapter
5. Connection cable
6. Manual override
7. Coupling bushing
8. Factory-installed 1/2-inch guide
9. Auxiliary Switch A
10. Auxiliary Switch B
11. Position indicator
12. Adjustment lever with
locking screw (4 mm hex)
13. Set screw for mechanical
range stop (4 mm hex)
14. Mounting bracket

Technical Instructions OpenAir® GDE Enhanced Non-Spring Return Rotary Electronic Damper Actuator
Document Number 155-784
October 20, 2016
Page 6 Siemens Industry, Inc.
Actuator
Components,
Continued
Modulating
Figure 9. Parts of the Actuator.
Legend
1. Base plate
2. Positioning scale for angle of rotation
3. Slope adjustment
4. Offset (start point) adjustment
5. DIP switches
6. Cover for DIP switches
7. Conduit adapter
8. Connection cable
9. Manual override
10. Coupling bushing
11. Factory-installed 1/2-inch guide
12. Auxiliary Switch A
13. Auxiliary Switch B
14. Position indicator
15. Adjustment lever with
locking screw (4 mm hex)
16. Set screw for mechanical
range stop (4 mm hex)
17. Mounting bracket
Operation
A continuous 0(2) to 10 Vdc signal from a controller to wire 8 (Y) operates 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 0position.
Life expectancy
An improperly tuned loop will cause excessive repositioning that will shorten the life of
the actuator.
Control signal
adjustment
GDE163.1P and GDE164.1P: For sequencing and the electronic limitation of the angle
of rotation.
Use the Uo potentiometer to set the offset (start point) between 0 to 5 Vdc.
Use the U potentiometer to set the slope (span) between 2 to 30 Vdc.
NOTE: The Y input is limited to a maximum of 10 Vdc. If the sum of the offset and
slope setting is greater than 10V, the angle of rotation is reduced providing the
feature of electronic limitation of the angle of rotation.

OpenAir® GDE Enhanced Non-Spring Return Rotary Electric Damper Actuator Technical Instructions
Document Number 155-784
October 20, 2016
Siemens Industry, Inc. Page 7
Control signal
adjustment,
continued
Figure 10.
Ys Actuator position (100% = angle of rotation 90°*)
Y Control input signal
Uo Offset (start point)
U Slope
Uw Active voltage range (Ys changes)
* When the mechanical limitation of the angle of rotation
and self-adapt function are ON, 100% does not equal
90°. Also valid for control signal 0 to 10 Vdc.
Setting for
10V slope
0 Vdc offset
Figure 11.
Table 2.
Examples in Figure 10
Uo
Offset
Vdc
U
Slope
Vdc
Active Voltage
Range
Vdc
Ys
Actuator
Position
1. Minimum slope
0
2
0 to 2
0 to 100%
2. Limitation of rotation
5
30
5 to 10
0 to 16.7%
3. Limitation of rotation
0
30
0 to 10
0 to 33.3%
4. Setting shown in Figure
11.
0
10
0 to 10
0 to 100%
Control signal
adjustment
example:
Determine the setting needed to electronically limit the angle of rotation between 0 to 50%
(0° to 45°) using a 2 to 10 Vdc input.
Calculating the value of U:
VdcVdcVdcVdcUoVdc
[%]
U16)210(
%50 %100
])[][10(
[%]Ysrotationof
angleworking
100 
Settings: Uo = 2 Vdc;
U = 16 Vdc
Electronic limitation
angle of rotation Ys = 50% (45°)
Slope U = 16V
Active voltage range Uw = 2 to 10 Vdc
Figure 12. Example.

Technical Instructions OpenAir® GDE Enhanced Non-Spring Return Rotary Electronic Damper Actuator
Document Number 155-784
October 20, 2016
Page 8 Siemens Industry, Inc.
Auxiliary Switches
GDE146.1P, GDE346.1U, GDE164.1P, GDE166.1P
Figure 13 shows the adjustable switching values for Auxiliary Switches A and B.
Actuator Scale:
Clockwise
Adjustment range for
Switches A and B
Setting interval: 5°
Switching hysteresis: 2°
Actuator Scale:
Counterclockwise
Figure 13. Adjustable Switching Values
for the Dual Auxiliary Switches.
NOTE: The auxiliary switch setting shafts rotate with the actuator. The scale is valid only
when the actuator is in the 0 position on clockwise motion.
Use the long arm of the †(AUX SWITCHADJUSTMENT) to point to the position of Switch A. Use
the narrower tab on the red ring to point to the position of Switch B.
Rotation Direction
GDE14x.1P, GDE34x.1U
Two-position/Floating
Control
Figure 14. Setting the Rotation Direction.

OpenAir® GDE Enhanced Non-Spring Return Rotary Electric Damper Actuator Technical Instructions
Document Number 155-784
October 20, 2016
Siemens Industry, Inc. Page 9
Rotation Direction
Switch
Counterclockwise Clockwise
Figure 15. Direction of Rotation Switch.
The factory setting is clockwise.
The direction of rotation switch should match the damper rotation movement.
Dual in-Line Package
(DIP) Switches
GDE16x.1P
Raise the protective cover from left to right to locate the DIP switches. See
Figure 9 for the location of the cover.
Modulating
control signal selection
Figure 16.
0 to 10 Vdc
Position
(Factory Setting).
To change the control signal from the factory setting (0 to
10 Vdc), move the first DIP switch to the UP (2-10)
position.
Self-adapt Switch
Figure 17.
OFF Position
(Factory Setting).
The factory setting is 0(OFF).
When mechanical angle of rotation is limited, the self-adapt
switch (middle DIP switch) may be turned ON so that the
limited range will become the new 0 to 100% for the
actuator logic. In this case, 0 to 100% is not equal to 90°
CAUTION:
When turning the self-adaptive feature on or
after the 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.
The self-adapt capability will scale the control signal
selected, either a 0 to10 Vdc or a 2 to 10 Vdc signal, within
the adjusted mechanical range. The feedback signal will
also reflect the control signal selected, either a 0 to 10 Vdc
or a 2 to 10 Vdc.

Technical Instructions OpenAir® GDE Enhanced Non-Spring Return Rotary Electronic Damper Actuator
Document Number 155-784
October 20, 2016
Page 10 Siemens Industry, Inc.
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 eaDamper AringTorque Rat 1

1Safety Factor: When determining the torque of an actuator 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 (or 80% of the rated torque).
4. Select the non-spring return actuator type from Table 3.
Table 3.
Total Torque
Actuator
<44 lb-in (5 Nm)
GDE
<88 lb-in (10 Nm)
GLB
<132 lb-in (15 Nm)
GEB
<221 lb-in (25 Nm)
GBB
<310 lb-in (35 Nm)
GIB
>310 lb-in >620 lb-in
(35 Nm to 70 Nm)
Use tandem mounting bracket ASK73.1 with
any GIB1x actuator.
Mounting and
Installation
Place the actuator on the damper shaft so that the front of the actuator is
accessible. The label is on the front side. A mounting bracket is included with the
actuator.
The minimum damper drive shaft length is 3/4-inch (20 mm).
Observe the service envelope around the actuator as shown in Figure 31.
Detailed mounting instructions are included with each actuator.
1/2-inch Ø
Factory-Installed
Guide
3/8-inch Ø
Use the shaft insert supplied for any
3/8-inch (8 to 10mm) diameter shaft
5/8-inch Ø
Figure 18. Damper Shaft Sizes.
NOTE: For all damper shafts with the exception of the 1/2-inch round shaft: Remove
1/2-inch Ø factory-installed guide before installation.

OpenAir® GDE Enhanced Non-Spring Return Rotary Electric Damper Actuator Technical Instructions
Document Number 155-784
October 20, 2016
Siemens Industry, Inc. Page 11
Manual Override
To move the damper blades and lock the position with no
power present:
1. Slide the red manual override knob toward the back of
the actuator.
2. Make adjustments to the damper position.
3. Slide the red manual override knob toward the front of
the actuator.
Once power is restored, the actuator returns to automated
control.
Figure 19.
Manual Override.
Mechanical
Range
Adjustment
To mechanically limit the range of the damper blade, do the following:
1. Loosen the stop set screw.
2. Move the screw along the track to
the desired position, and fasten it
in place.
Figure 20. Moving the Mechanical Range Stop.
To use the entire 0(2) to 10V input signal to control the mechanically limited range,
see Figure 17 for setting self-adaptive features.
Example:
Stop set screw at 70°
Self-adapt switch ON
Input signal Y = 5 Vdc
The damper will be at 35° (50% of the adjusted range.)
NOTE: On versions with the slope and offset features, this example assumes
Offset Uo = 0 Vdc
Slope U = 10 Vdc
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 sum of the VA ratings of all actuators and all other components powered by one
transformer must not exceed the rating of the transformer.
It is recommended that one transformer power no more than 10 actuators.
WARNING:
All six outputs of the dual auxiliary switch (A and B) must only be connected to:
Class 2 voltage (UL/CSA).
Separated Extra-Low Voltage (SELV) or Protective Extra Low Voltage
(PELV) (according to HD384-4-41) for installations requiring conformance.
1
2

Technical Instructions OpenAir® GDE Enhanced Non-Spring Return Rotary Electronic Damper Actuator
Document Number 155-784
October 20, 2016
Page 12 Siemens Industry, Inc.
Wiring,
continued
WARNINGS:
Installations requiring Conformance:
All wiring for CE certified actuators must be SELV or PELV rated per
HD384-4-41.
Use safety-isolating transformers (Class III transformer) per EN61558.
They must be rated for 100% duty cycle.
Over current protection for supply lines is maximum 10A.
Each wire has the standard symbol printed on it. See
Table 4.
GDE14x
24 Vac/dc Power Supply, 2-Position/Floating
Control
Figure 21.GDE14x Wiring Diagram.
Figure 22. 2-Position, SPST
(Single-Pole, Single-Throw).
Figure 23. 2-Position, SPDT
(Single-Pole, Double-Throw).
Table 4. 2-Position/Floating Control 24 Vac/dc.
Standard
Symbol
Function
Terminal
Designation
Color
1
Supply (SP)
G
Red
6
Control signal clockwise
Y1
Violet
7
Control signal
counterclockwise
Y2
Orange
Factory-installed Options
S1
Switch A Common
Q11
Gray/red
S2
Switch A N.C.
Q12
Gray/blue
S3
Switch A N.O.
Q14
Gray/pink
S4
Switch B Common
Q21
Black/red
S5
Switch B N.C.
Q22
Black/blue
S6
Switch B N.O.
Q24
Black/pink
P1
Feedback Potentiometer
0 to 100% P1 - P2
(0 to 5,000 ohms)
a
Black
P2
Feedback Potentiometer
Common
b
Black
P3
Feedback Potentiometer
100 to 0% P3 - P2
(5,000 to 0 ohms)
c
Black
Figure 24. Floating Control
24 Vac/dc.

OpenAir® GDE Enhanced Non-Spring Return Rotary Electric Damper Actuator Technical Instructions
Document Number 155-784
October 20, 2016
Siemens Industry, Inc. Page 13
Wiring, continued
GDE34x
100 to 240 Vac Power Supply, Two-Position
Floating Control
Each wire has the standard symbol printed on it. See
Table 5.
Figure 25. 2-Position, SPST
(Single-Pole, Single-Throw).
Figure 26. 2-Position, SPDT
(Single-Pole, Double-Throw).
Table 5. Two-Position, Floating Control, 100 to 240 Vac.
Standard
Symbol
Function
Terminal
Designation
Color
4
Supply (SP)
N
Light Blue
6
Control signal
clockwise
Y1
Black
7
Control signal
counterclockwise
Y2
White
Factory-installed Options
S1
Switch A
Common
Q11
Gray/Red
S2
Switch A –NC
Q12
Gray/Blue
S3
Switch A –NO
Q14
Gray/Pink
S4
Switch B –
Common
Q21
Black/Red
S5
Switch B –NC
Q22
Black/Blue
S6
Switch B –NO
Q24
Black/Pink
Figure 27.GDE34x Figure 28. Floating Control
Wiring Diagram 100 to 240 Vac.
Table 6. Modulating Control, 24 Vac/dc.
GDE 16x
24 Vac/dc Power Supply, 0(2)
to 10V Modulating Control
Standard
Symbol
Function
Terminal
Designation
Color
1
Supply (SP)
G
Red
2
Neutral (SN)
G0
Black
Figure 29. GDE16x Wiring Diagram.
8
0(2) to 10V input signal
Y
Gray
9
Output for 0(2) to 10 Vdc
position indication
U
Pink
Factory-installed Options
S1
Switch A Common
Q11
Gray/Red
S2
Switch A - NC
Q12
Gray/Blue
S3
Switch A - NO
Q14
Gray/Pink
S4
Switch B - Common
Q21
Black/Red
S5
Switch B - NC
Q22
Black/Blue
S6
Switch B - NO
Q24
Black/Pink

Technical Instructions OpenAir® GDE Enhanced Non-Spring Return Rotary Electronic Damper Actuator
Document Number 155-784
October 20, 2016
Page 14 Siemens Industry, Inc.
Start-Up/
Commissioning
24 Vac/dc
Two-position/ Floating
24 Vac/dc
GDE14x
1. Connect a Digital Multimeter (DMM) to the supply voltage wires.
2. Verify that the supply voltage is between 19.2 and 28.8 Vac/dc.
3. Turn off the power supply.
Check Operation:
1. Connect all wires per Figure 21.
2. Apply a control signal (24 Vac) to wires 1 (red) and 6 (violet).
3. Allow the actuator shaft coupling to rotate from 0° to 90°.
4. Stop applying the control signal to wires 1 (red) and 6 (violet).
5. Apply a control signal (24 Vac) to wires 1 (red) and 7 (orange).
6. Allow the actuator shaft coupling to rotate from 90° to 0°.
Check Feedback:
1. Set the DMM dial to ohms.
2. Connect wires P1 and P2 to the DMM. The DMM should indicate a resistive value.
3. Apply a control signal (24 Vac) to wires 1 (red) and 6 (violet). The reading of the DMM
should increase.
4. Connect wires P2 and P3 to the DMM. The DMM should indicate a resistive value.
5. Apply a control signal (24 Vac) to wires 1 (red) and 7 (orange). The reading of the DMM
should increase.
Check Auxiliary Switch A:
1. Set the DMM dial to ohms (resistance) or continuity check.
2. Connect wires S1 and S3 to the DMM. The DMM should indicate open circuit or no
resistance.
3. 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.
4. Stop applying the control signal to wires 1 (red) and 6 (violet).
5. Connect wires S1 and S2 to the DMM. The DMM should indicate open circuit or no
resistance.
6. 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.
Check Auxiliary Switch B:
1. Set the DMM dial to ohms (resistance) or continuity check.
2. Connect wires S4 and S6 to the DMM. The DMM should indicate open circuit or no
resistance.
3. 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 B.
4. Stop applying the control signal to wires 1 (red) and 6 (violet).
5. Connect wires S4 and S5 to the DMM. The DMM should indicate an open circuit or no
resistance.
6. Apply a control signal to wires 1 (red) and 7 (orange). The DMM should indicate contact
closure as the actuator shaft coupling reaches the setting of Switch B.

OpenAir® GDE Enhanced Non-Spring Return Rotary Electric Damper Actuator Technical Instructions
Document Number 155-784
October 20, 2016
Siemens Industry, Inc. Page 15
Start-Up/
Commissioning
Two-position/ Floating
100 to 240 Vac
GDE34x
1. Connect a Digital Multimeter (DMM) to the supply voltage wires.
2. Verify that the supply voltage is between 100 and 240 Vac.
3. Turn off the power supply.
Check Operation:
1. Connect all wires per Figure 27.
2. Apply a control signal (100 to 240 Vac) to wires 4 (light blue) and 6 (black).
3. Allow the actuator shaft coupling to rotate from 0° to 90°.
4. Stop applying the control signal to wires 4 (light blue) and 6 (black).
5. Apply a control signal (100 to 240 Vac) to wires 4 (light blue) and 7 (white).
6. Allow the actuator shaft coupling to rotate from 90° to 0°.
Check Auxiliary Switch A:
1. Set the DMM dial to ohms (resistance) or continuity check.
2. Connect wires S1 and S3 to the DMM.
The DMM should indicate open circuit or no resistance.
3. Apply a control signal (100 to 240 Vac) to wires 4 (light blue) and 6 (black). The DMM
should indicate contact closure as the actuator shaft coupling reaches the setting of
Switch A.
4. Stop supplying the control signal to wires 4 (light blue) and 6 (black).
5. Connect wires S1 and S2 to the DMM. The DMM should indicate open circuit or no
resistance.
6. Apply a control signal (100 to 240 Vac) to wires 4 (light blue) and 7 (white). The DMM
should indicate contact closure as the actuator shaft coupling reaches the setting of
Switch A.
Check Auxiliary Switch B:
1. Set the DMM dial to ohms (resistance) or continuity check.
2. Connect wires S4 and S6 to the DMM. The DMM should indicate open circuit or no
resistance.
3. Apply a control signal (100 to 240 Vac) to wires 4 (light blue) and 6 (black). The DMM
should indicate contact closure as the actuator shaft coupling reaches the setting of
Switch B.
4. Stop applying the control signal to wires 4 (light blue) and 6 (black).
5. Connect wires S4 and S5 to the DMM. The DMM should indicate open circuit or no
resistance.
6. Apply a control signal (100 to 240 Vac) to wires 4 (light blue) and 7 (white) The DMM
should indicate contact closure as the actuator shaft coupling reaches the setting of
Switch B.

Technical Instructions OpenAir® GDE Enhanced Non-Spring Return Rotary Electronic Damper Actuator
Document Number 155-784
October 20, 2016
Page 16 Siemens Industry, Inc.
Start-Up/
Commissioning
24 Vac/dc
Modulating
1. Connect a Digital Multimeter (DMM) to the supply voltage wires.
2. Verify that the supply voltage is between 19.2 and 28.8 Vac/dc.
3. Turn off the power supply.
GDE16x
Check operation:
1. Connect all wires per Figure 29.
2. Set the DMM dial to Vdc.
3. Connect wires 2 (black) and 8 (gray) to the DMM.
4. Apply a full-scale input signal (10 Vdc) to wire 8 (gray).
5. Allow the actuator shaft coupling to rotate from 0° to 90°.
6. Disconnect wire 8 (gray) and the shaft coupling returns to the 0position.
Check Feedback:
1. Set the DMM dial to Vdc.
2. Attach wires 2 (black) and 9 (pink) to the DMM.
3. Apply a full-scale input signal to wire 8 (gray). The reading at the DMM should increase.
4. Remove the signal from wire 8 (gray). The reading at the DMM should decrease and the
actuator shaft coupling returns to the 0position.
Check Auxiliary Switch A:
1. Set the DMM dial to ohms (resistance) or continuity check.
2. Connect wires S1 and S3 to the DMM.
The DMM should indicate open circuit or no resistance.
3. 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.
4. Connect wires S1 and S2 to the DMM. The DMM should indicate open circuit or no
resistance.
5. Stop the signal to wire 8 (gray). The DMM should indicate contact closure as the actuator
shaft coupling reaches the setting of Switch A.
Check Auxiliary Switch B:
1. Set the DMM dial to ohms (resistance) or continuity check.
2. Connect wires S4 and S6 to the DMM. The DMM should indicate open circuit or no
resistance.
3. 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.
4. Connect wires S4 and S5 to the DMM. The DMM should indicate open circuit or no
resistance.
5. Stop the signal to wire 8 (gray). The DMM should indicate contact closure as the
actuator shaft coupling reaches the setting of Switch B.
Troubleshooting
WARNING:
Do not open the actuator.
If the actuator is inoperative, replace the unit.

OpenAir® GDE Enhanced Non-Spring Return Rotary Electric Damper Actuator Technical Instructions
Document Number 155-784
October 20, 2016
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 registered trademark of Siemens Industry, Inc. Other product or company names mentioned herein
may be the trademarks of their respective owners. © 2016 Siemens Industry, Inc.
Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089
USA
Tel. + 1 847-215-1000
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Document No. 155-784
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Page 17
Dimensions
Figure 30. Dimensions of the ASK75.7U Weather Shield in Inches (Millimeters).
Figure 31. GDE Actuator and Mounting Bracket Dimensions in Inches (mm).
Figure 32. Dimensions of the OpenAir GDE/GLB Enhanced Actuator and Mounting Bracket.