Installation Instructions Document No. A5W00070317 November 9, 2020 OpenAir® GRD Series Electronic Damper Actuator Designed for UL Listed Fire/Smoke and Smoke Control Dampers Item Number: A5W00070317, Rev. BA Page 1 of 5 a. Actuator b. Hex key – 3 mm c. Eyelet and 1/4-inch hex head screw Figure 1. GRD Actuator Parts. Product Description Step-by-step description for direct-coupled mounting of the OpenAir GRD fast-acting, two-position, spring return, rotary electronic damper actuator. These actuators are intended for control of approved fire and smoke leakage-rated HVAC dampers. Product Numbers GRD121.1U GRD126.1U GRD221.1U GRD226.1U GRD321.1U GRD326.1U Warning/Caution Notations WARNING: Personal injury or loss of life may occur if you do not follow a procedure as specified. CAUTION: Equipment damage or loss of data may occur if you do not follow a procedure as specified. Required Tools • 3 mm hex wrench (provided) • No. 2 Phillips screwdriver • Drill • 1/4-inch (6.4 mm) hex driver Prerequisites WARNING: Do not open the actuator housing. CAUTION: Continuous use at voltages above the recommended tolerances may damage the actuator. Installation Figure 2. Actuator Mounting Orientation. Document No. A5W00070317 Installation Instructions November 9, 2020 Page 2 of 5 Siemens Industry, Inc. Figure 3. Shaft Length and Proper Shaft Adapter Location. Figure 4. Fasten the Shaft Adapter to the Damper Shaft. Figure 5. 1. Insert the eyelet through housing ear. 2. Insert screw through eyelet and tighten using 1/4-inch (6.4 mm) hex driver. Figure 6. Tighten Conduit Screws (No. 2 Phillips Screwdriver). CAUTION: Apply 35 in-lb to 53 in-lb (4 Nm to 6 Nm) maximum torque to the shaft fixation set screws. All four screws must be tightened. Document No. A5W00070317 Installation Instructions November 9, 2020 Siemens Industry, Inc. Page 3 of 5 Wiring NOTE: All wiring must conform to NEC and local codes and regulations. 24 Vac/dc Function Color Supply Red Neutral Black Ground Green/Yellow 120 Vac Function Color Line Black Neutral White Ground Green/Yellow 230 Vac Function Color Line Brown Neutral Blue Ground Green/Yellow CAUTION: These AC powered actuators must be wired with Line referenced with respect to Neutral, as indicated. The ground lead must be connected for proper protection of the actuator. Any other connection, such as phase-to-phase, can damage the actuator. Switch Wire Color Switch Makes Switch Breaks 5° Gray < 5° > 5° 85° Yellow > 85° < 85° Fixed Dual End Switches. NOTE: Both sets of contacts are open when actuator is between 5° and 85°. CAUTION: Mixed switch operation to the switching outputs of both fixed dual end switches (5° and 85°) is not permitted. Either AC line voltage from the same phase must be applied to all four outputs of the fixed dual end switches, or UL-Class 2 voltage must be applied to all four outputs. Document No. A5W00070317 Installation Instructions November 9, 2020 Page 4 of 5 Siemens Industry, Inc. Wiring, Continued Electronic Fusible Link (EFL) All GRD Electronic Damper Actuators are EFL- capable. EFLs are purchased separately. See Table 1. Table 1. Electronic Fusible Link Product Numbers. Part Number Operation ASK791.165 165°F (74°C) ASK791.212 212°F (100°C) ASK791.250 250°F (121°C) ASK791.350 350°F (177°C) NOTE: All EFLs are low voltage and do not need to be wired in conduit. To install an EFL, do the following: 1. Remove and discard the cover marked EFL. 2. Use a small, needle-nose pliers to squeeze the release lock of the jumper plug and remove the jumper plug. NOTE: Remove the entire jumper plug, including the wire loop. 3. Insert the quick connect plug from the EFL and ensure that the cable is secure. NOTE: If you are not using an EFL, do not modify the actuator. An EFL or jumper plug must be installed for actuator to work properly. Maintenance CAUTION: The GRD actuator does not require any periodic cycling to function properly as an integral part of an active smoke control damper system. The National Fire Alarm Code NFPA 72 states that all life safety systems are to be functionally checked at least annually. Check the smoke control damper/actuator every time you functionally check your smoke detectors, emergency lights, and/or power generators for operation. Document No. A5W00070317 Installation Instructions November 9, 2020 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. © 2020 Siemens Industry, Inc. Siemens Industry, Inc. Smart Infrastructure 1000 Deerfield Parkway Buffalo Grove, IL 60089 + 1 847-215-1000 Your feedback is important to us. If you have comments about this document, please send them to sbt_technical.editor.us.sbt@sbt.siemens.com Document No. A5W00070317 Printed in the USA Page 5 of 5 Dimensions Figure 7. Dimensions of the GRD OpenAir Actuator in Inches (mm). References Technical Instructions OpenAir® GRD Series Electronic Damper Actuator UL Listed Fire/Smoke and Smoke Control Dampers A6V11486812 Next >