Installation Instructions Document No. 129-404 April 13, 2020 OpenAir ® GCA Spring Return Rotary Electronic Damper Actuator Item Number: 129-404 Rev. KA Page 1 of 7 a. Actuator b. Self-centering shaft adapter b’. Oversized shaft adapter c. Position indicator d. Shaft adapter locking clip e. Position indicator adapter f. Mounting bracket g. Mounting screws h. 3 mm hex key i. Conduit adapter 1/2-inch (Not available to GCAxxx.xP models) j. 500 ohm resistor (GCA15x.xx only) Figure 1. Parts of the GCA Actuator. Product Description Describes the steps for direct-coupled mounting of the OpenAir GCA spring return electronic damper actuators. Product Numbers GCAx 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 • 10 mm (13/32-inch) open-end wrench • Drill and 4 mm (5/32-in) drill bit • 3 mm hex key (provided) • Phillips screwdriver • Small flat-blade screwdriver • Marker or pencil Additional for oversized shaft adapter: • 10 mm (13/32-inch) socket wrench • 6 mm hex key Expected Installation Time 30 minutes WARNING: Do not open actuator. CAUTION: Do not turn the 3 mm hex key against the direction of the arrow. Mounting Positions Figure 2. Acceptable NEMA 2-Positions. Figure 3. Only Acceptable Position for NEMA Type 3R Rating Using ASK75.1U Weather Shield. The GCA actuator is UL listed to meet NEMA Type 3R requirements (a degree of protection against rain, sleet, and damage from external ice formation) when installed with the Weather Shield (product number ASK75.1U) and outdoor-rated conduit fittings. Actuator must be in the vertical position. Prerequisites NOTE: Actuator is shipped from the factory with 5° preload. When power is applied to the actuator, the preload is released. To manually release the preload, insert the 3 mm hex key in the override opening and turn the key in the direction of the arrow. See Manual Override. Document No. 129-404 Installation Instructions April 13, 2020 Page 2 of 7 Siemens Industry, Inc. Installation Table 1. Actuator Positioning and Damper Control. Document No. 129-404 Installation Instructions April 13, 2020 Siemens Industry, Inc. Page 3 of 7 Installation, Continued Figure 4. Shaft Length and Proper Shaft Adapter Location. Figure 5. Close the Damper. Figure 6. Place the Actuator on the Shaft. Figure 7. Fasten the Mounting Bracket. NOTE: With an oversized shaft adapter (b’), tighten the middle screw so that the shaft is in the center of the shaft adapter opening. Figure 8. Fasten the Shaft Adapter to the Damper Shaft. NOTE: If the damper fail-safe position is open, change the actuator preload from the factory-set 5° to 85°. See Manual Override. Document No. 129-404 Installation Instructions April 13, 2020 Page 4 of 7 Siemens Industry, Inc. Manual Override Figure 9. Manual Override. To use manual override or set preload, do the following: (Figure 9) 1. Insert the 3 mm hex key in the override opening, (Step 1). 2. Turn the key in the direction of the arrow until you reach the desired degree of opening, (Step 2). 3. Hold the key in place, (Step 3). 4. Insert a small flat-blade screwdriver into the gear train lock pin. Turn the screwdriver in the same direction as the arrow until you hear a click or meet slight resistance, (Step 4). CAUTION: When engaging the gear train lock pin, cautiously turn only about 5 degrees until you hear a click or meet slight resistance. Turning too far will strip the lock pin. 5. Remove the key or keep it in place, (Step 5). To release manual override or preload 1. Insert the 3 mm hex key in the override opening, (Step 6). 2. Turn the key only a short distance in the direction of the arrow, (Step 7). 3. Remove the key, (Step 8). The actuator will return to 0 (fail-safe) position. NOTE: Applying power and sending a control signal will release manual override. Mechanical Range Adjustment Figure 10. The Angular Rotation is Adjustable Between 0° and 90° at 5 Degree Intervals. Ensure that the actuator is in the 0 (fail-safe) position when making this adjustment. If making the adjustment before the actuator is in service, take into account the factory set 5° preload. To release the preload, see To Release Manual Override or Preload section. Other settings For adjustment of auxiliary switches and span/offset options see the Technical Instructions listed under References. Tandem Operation Two GCA Actuators with 2-position or floating control signal are mounted to the same side of the damper shaft using the ASK73.1 Tandem Mounting Bracket as shown in Figure 11. Two GCA Actuators with a modulating control signal are mounted to the same side of the damper shaft using the ASK73.2U Tandem Mounting Bracket also as shown in Figure 11. Figure 11. Tandem Mounting on Same Side of Damper Shaft. NOTE: For applications requiring single damper shaft operation by up to four GCA modulating control signal actuators mounted on each side of the damper shaft, use the GCA15x Series Actuators with Master/Slave mode operation selected. See Figure 12. (See Wiring Diagrams for GCA15x Series master/slave operation wiring instructions.) (See OpenAir™ Spring Return Electric Damper Actuator Modulating Control Technical Instructions document 155-173P25 for complete tandem mounting instructions.) Document No. 129-404 Installation Instructions April 13, 2020 Siemens Industry, Inc. Page 5 of 7 Figure 12. Tandem Mounting on Each End of Damper Shaft. References OpenAir™ Spring Return Electric Damper Actuator Modulating Control Technical Instructions (155-173P25). OpenAir™ Weather Shield Kits Installation Instructions (129-261). 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. NOTE: 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 not more than 80% of the transformer VA be utilized. The GCA actuator consumes 8 VA or less. CAUTION: Mixed switch operation to the switching outputs of both auxiliary switches (A and B) is not permitted. Either AC line voltage from the same phase must be applied to all six outputs of the dual auxiliary switches, or UL-Class 2 voltage must be applied to all six outputs. NOTE: With Plenum cables, only UL-Class 2 voltage is permitted. Actuator Operating Voltage Power Consumption Modulating Control GCA16x 24 Vac 7 VA/5W GCA15x 24 Vac/dc 7 VA/5W 2-Position and Floating Control GCA12x, GCA13x 24 Vac/dc 7 VA/5W GCA22x 120 Vac 8 VA Wiring Diagrams Modulating 0 to 10 Vdc Control, 24 Vac: GCA16x Modulating 2 to 10 Vdc Control, 24 Vac/dc: GCA15x 2-position Control, 24 Vac/dc: GCA12x Floating Control, 24 Vac/dc: GCA13x 2-position Control, 120 Vac: GCA22x Special Application: Modulating 4 to 20 mA Control with GCA15x and external 500 ohm resistor Document No. 129-404 Installation Instructions April 13, 2020 Page 6 of 7 Siemens Industry, Inc. Wiring Diagrams, Continued Master/Slave: GCA15x Table 2. Wire Designations. Standard Symbol Function Terminal Connection Color Standard Plenum 1 Supply (SP) G Red Red 2 Neutral (SN) G0 Black Black 3 Line L Black Black 4 Neutral N White White 6 Control signal clockwise Y1 Violet Violet 7 Control signal counterclockwise (GCA16x) Y2 Orange Orange 8 Input Signal 0 to 10 Vdc (GCA16x) 2 to 10 Vdc (GCA15x) Y Gray Gray 9 Position Output 0 to 10 Vdc (GCA16x) 2 to 10 Vdc (GCA15x) U Pink Pink S1 Switch A Common Q11 Gray/ red Gray/ red S2 Switch A N.C. Q12 Gray/ blue Gray/ blue S3 Switch A N.O. Q14 Gray/ pink Gray/ pink S4 Switch B Common Q21 Black/ red Black/ red S5 Switch B N.C. Q22 Black/ blue Black/ blue S6 Switch B N.O. Q24 Black/ pink Black/ pink P1 Feedback Potentiometer 0 to 100% P1 - P2 a White/ red Black P2 Feedback Potentiometer Common b White/ blue Black P3 Feedback Potentiometer 100 to 0% P3 - P2 c White/ pink Black Retrofit Wiring Modulating Control (0 to 10 Vdc) Function Siemens GCA Series Belimo AFB Series Honeywell MS7520 Series Johnson M9220 Series Color Number Color Number Color Number Color Number Supply (24V) Red 1 Red 2 Red 1 Red 2 Common Black 2 Black 1 Black 2 Black 1 0(2) to 10 Vdc Input Gray 8 White 3 White 3 Gray 3 0(2) to 10 Vdc Feedback Pink 9 Orange 5 Blue 5 Orange 4 2-Position Control (24 Vac/Vdc) Function Siemens GCA Series Belimo AFB Series Honeywell MS8120 Series Johnson M9220 Series Color Number Color Number Color Number Color Number Supply (24V) Red 1 Red 2 Red 1 Red 2 Common Black 2 Black 1 Black 2 Black 1 2-Position Control (120 Vac) Function Siemens GCA Series Belimo AFB Series Honeywell MS4120 Series Johnson M9220 Series Color Number Color Number Terminal Only Number Color Number Line (120V) Black 3 Black 2 1 Black 2 Neutral White 4 White 1 2 White 1 Document No. 129-404 Installation Instructions April 13, 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. Other 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 60089-4513 USA +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@siemens.com Document No. 129-404 Printed in the USA Page 7 of 7 Dimensions Figure 13. Dimensions of the ASK75.1U Weather Shield in Inches (Millimeters). Figure 14. Dimensions of the GCA OpenAir Actuator and Mounting Bracket in Inches (Millimeters). Next >