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Siemens OpenAir GBB161.1U Technical Instructions

Electronic damper actuators, non-spring return, 24 vac, modulating control


OpenAir™ GBB/GIB Series
Electronic Damper Actuators
Non-Spring Return, 24 Vac, Modulating Control
Product Numbers
221 lb-in
0 to 10 Vdc
(25 Nm)
310 lb-in
0 to 10 Vdc
(35 Nm)
These actuators are used in constant or variable air volume installations for the control of supply
return air, mixed air, exhaust, rooftop units, and face and bypass dampers requiring up to 221 lb-in
(25 Nm) torque or 310 lb-in (35 Nm) torque.
The OpenAir, non-spring return (NSR), 24 Vac, rotary, direct-coupled, electric actuator
is designed for modulating control of building HVAC dampers.
Built-in feedback on modulating units
Unique self-centering shaft coupling
All metal housing
Two torque ranges available
Manual override
Offset and span adjustment models available
Independently adjustable dual auxiliary switches available
UL, cUL and CE listed
24 Vac Operating Voltage
Plenum Cable GBB161.1P
Plenum Cable
Technical Instructions
Document No. 155-176P25
Table 1.
Dual Auxiliary
Switches and
June 22, 2015
Dual Auxiliary
Switches only
Siemens Industry, Inc.


Table of Contents

Summary of Contents for Siemens OpenAir GBB161.1U

  • Page 1 These actuators are used in constant or variable air volume installations for the control of supply Application return air, mixed air, exhaust, rooftop units, and face and bypass dampers requiring up to 221 lb-in (25 Nm) torque or 310 lb-in (35 Nm) torque. Siemens Industry, Inc.
  • Page 2: Specifications

    Apply only AC-line voltage from the same phase 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. NOTE: With plenum cables, only UL-Class 2 voltage (SELV for CE is permissible). Page 2 Siemens Industry, Inc.
  • Page 3 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 30 Weight 4.4 lbs (2 kg) Country of Origin Siemens Industry, Inc. Page 3...
  • Page 4 Kit contains: • Crank arm that attaches to the splined hub of the shaft adapter Figure 4. Crank Arm Kit with Mounting • Mounting bracket Bracket. • Required mounting fasteners Page 4 Siemens Industry, Inc.
  • Page 5 ASK75.7U Weather Shield and outdoor-rated conduit fittings. This weather shield may be mounted in any orientation. For dimensions, see Figure 29. Figure 8. NEMA Type 4X Weather Shield. Siemens Industry, Inc. Page 5...
  • Page 6: Service Parts

    Shield Assembly. 985-008: 1/2-inch (12 mm) for 1/2-inch NPT connector. Figure 10. Conduit Adapter. Service Parts Figure 11. Figure 12. Position Indicator. Standard Shaft Adapter. Figure 13. Anti-rotation (Mounting) Bracket. 985-003 985-004 985-006 (package of 10) Page 6 Siemens Industry, Inc.
  • Page 7: Actuator Components

    6. Manual override 7. Auxiliary switch B 8. Auxiliary switch A 9. Position indicator 10. Self-centering shaft adapter 11. Shaft adapter locking clip 12. Position indicator adapter 13. Mounting bracket Figure 14. Components of the Modulating Actuator. Siemens Industry, Inc. Page 7...
  • Page 8: Operation

    2. Uo = 5V, ∆U = 30V Maximum working range for Ys = 100% 3. Uo = 0V, ∆U ≈ 10V Factory setting Setting for 10V span 0 offset Figure 15. Minimum, Factory Setting, and Maximum Control Signal Adjustment. Page 8 Siemens Industry, Inc.
  • Page 9 To change the settings of A and B, use a flat-blade screwdriver to turn the switch adjustment dials to the desired setting at which a signal is to be given. Factory setting Switch A 5° Switch B 85° Figure 17. Dual Auxiliary Switch Dials. Siemens Industry, Inc. Page 9...
  • Page 10: Mounting And Installation

    The actuator is shipped from the factory with a 5° pre-load to ensure tight close off of the damper. • The shaft adapter and mounting parts are shipped in a separate container with the actuator. • Detailed mounting instructions are included with each actuator. Page 10 Siemens Industry, Inc.
  • Page 11: Manual Override

    1. Loosen the shaft adapter from the damper shaft and remove the actuator from the damper shaft. 2. Remove the clip and shaft adapter Figure 22. from the actuator. Figure 23. Figure 24. Figure 25. Siemens Industry, Inc. Page 11...
  • Page 12 6. Attach the clip. 7. Rotate the damper blade shaft to its "0" position. 8. Return the actuator to the damper shaft and tighten the shaft adapter to the damper shaft. Figure 26. Mechanical Range Adjustment. Page 12 Siemens Industry, Inc.
  • Page 13 NOTE: With plenum cables, only UL-Class 2 voltage is permitted. CAUTION: Do not parallel wire GBB/GIB with any other type of actuator, including GBB/GIB actuators with date codes earlier than 501 Siemens Industry, Inc. Page 13...
  • Page 14 Pink Switch A – Common Gray/red Switch A – Normally Closed Gray/blue Switch A – Normally Open Gray/pink Switch B – Common Black/red Switch B – Normally Closed Black/blue Switch B – Normally Open Black/pink Page 14 Siemens Industry, Inc.
  • Page 15 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. Siemens Industry, Inc. Page 15...
  • Page 16: Troubleshooting

    The actuator should resume normal operating mode. Dimensions Figure 28. Dimensions of the ASK75.1U Weather Shield in Inches (Millimeters). Figure 29. Dimensions of the ASK75.7U Weather Shield in Inches (Millimeters). Page 16 Siemens Industry, Inc.
  • Page 17 GBB/GIB Series Non-spring Return, 24 Vac, Modulating Control Technical Instructions Document Number 155-176P25 June 22, 2015 Dimensions, Continued Figure 30. Dimensions of the GBB/GIB Actuator and Mounting Bracket in Inches (mm). Siemens Industry, Inc. Page 17...
  • Page 18 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 SCHWEIZ AG. Product or company names mentioned herein may be the trademarks of their respective owners.

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