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Siemens OpenAir GDE Series Technical Instructions

Electric damper actuators, non-spring return rotary 24 vac - modulating control 0 to 10 vdc
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OpenAir™ Electric Damper Actuators
GDE/GLB Series
Non-spring Return Rotary
24 Vac - Modulating Control 0 to 10 Vdc
Product Numbers
44 lb-in (5 Nm)
Terminal Strip
88 lb-in (10 Nm)
The OpenAir direct coupled 24 Vac non-spring return rotary electric actuators are designed
for modulating control of dampers.
Compact, lightweight design
Self-adapting capability for maximum flexibility in damper positioning
Manual override
Offset and slope adjustment models available
Independently adjustable dual auxiliary switches available
cUL and UL listed;
These actuators are used in constant or variable air volume installations for control of HVAC
dampers requiring up to 44 lb-in (5 Nm) or 88 lb-in (10 Nm) of torque.
(24 pk)
(24 pk)
Technical Instructions
Document No. 155-187P25
Table 1. 24 Vac Operating Voltage.
November 30, 2005
Dual Auxiliary
Dual Auxiliary
Switches and
Siemens Building Technologies, Inc.



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  Summary of Contents for Siemens OpenAir GDE Series

  • Page 1 Slope/Offset Only Adjustable Plenum GDE161.1P GDE163.1P GDE164.1P GDE166.1P GDE161.1P/B (24 pk) 44 lb-in (5 Nm) GDE161.1T — — — Terminal Strip GDE161.1T/B — — — (24 pk) 88 lb-in (10 Nm) Plenum GLB161.1P GLB163.1P GLB164.1P GLB166.1P Siemens Building Technologies, Inc.
  • Page 2: Specifications

    95° Shaft size: Minimum shaft length 3/4-inch (20 mm) Mounting 3/8 to 5/8 inch 1/4 to 1/2 inch 9/16 inch 8 -16 mm 6 - 12.7 mm 15 mm Figure 1. Acceptable Shaft Sizes. Page 2 Siemens Building Technologies, Inc.
  • Page 3 Cable length: 3 feet (0.9m) Life cycle: Designed for over 60,000 full strokes and a minimum of 1.5 million repositions at rated torque and temperature Dimensions: See Figure 22 Weight: 1.06 lb (0.48 kg) Siemens Building Technologies, Inc. Page 3...
  • Page 4 (10/pk). Included in box with GDE/GLB series. NOTE: Factory-installed 1/2-inch Figure 6. Shaft insert. guide must be removed prior to installation. 985-101P25: Shaft guide, 1/2-inch (25/pk). Factory installed with GDE/GLB Series. Figure 7. 1/2-inch Shaft Guide. Page 4 Siemens Building Technologies, Inc.
  • Page 5: Actuator Components

    17. Mounting bracket GDE161.1T This model uses a terminal strip for connection purposes rather than cable GDE161.1T connections (7,8). 0 to 10 Vdc Input Supply 24 Vac Figure 9. Special Features of Terminal Strip Model. Siemens Building Technologies, Inc. Page 5...
  • Page 6: Operation

    0 to 100% 2. Limitation of rotation 5 to 10 0 to 16.7% 3. Limitation of rotation 0 to 10 0 to 33.3% 4. Setting shown in Figure 4 0 to 10 0 to 100% Page 6 Siemens Building Technologies, Inc.
  • Page 7 “0” position on clockwise motion. Use the long arm of the X to point to the position of switch A. Use the narrower tab on the red ring to point to the position of switch B. Siemens Building Technologies, Inc. Page 7...
  • Page 8 If the direction of rotation is counterclockwise, the output signal switch should be set at reverse acting to match the direction of the Figure 16. rotation switch. Output Signal Switch. NOTE: Feedback not available on terminal strip models. Page 8 Siemens Building Technologies, Inc.
  • Page 9: Mounting And Installation

    Use the shaft insert supplied for any Guide 3/8-inch (8 to 10mm) diameter shaft Figure 17. Damper Shaft Sizes. NOTE: For all damper shafts with the exception of the 1/2-inch round shaft: Remove 1/2 Ø inch guide before installation. Siemens Building Technologies, Inc. Page 9...
  • Page 10 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 ΔU= 10 Vdc Page 10 Siemens Building Technologies, Inc.
  • Page 11 Factory-installed Options Switch A Common Black S2 S3 S5 S6 Switch A - N.C. Black Switch A - N.O. Black Switch B - Common Black Switch B - N.C. Black Switch B - N.O. Black Siemens Building Technologies, Inc. Page 11...
  • Page 12 Connect wires S1 and S2 to the DMM. The DMM should indicate open circuit or no resistance. Stop the signal to wire 8 (gray). The DMM should indicate contact closure as the actuator shaft coupling reaches the setting of switch A. Page 12 Siemens Building Technologies, Inc.
  • Page 13 15/16 (94) min. 2-3/8 inch 60 mm 2-3/8 (60) min. 1 inch 25 mm min. 3/8 inch 10 mm 13/16 (21) 2-3/4 (70) Figure 22. GDE/GLB Actuator and Mounting Bracket Dimensions in Inches (mm). Siemens Building Technologies, Inc. Page 13...
  • Page 14 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 Building Technologies, Inc. Other product or company names mentioned herein may be the trademarks of their respective owners.