OpenAir™ Technical Instructions Document No. 155-173P25 EA GCA-1 June 22, 2015 GCA Series Spring Return 160 lb-in Electronic Damper Actuators Siemens Industry, Inc. Description The OpenAir 24 Vac/dc spring return 160 lb-in (18 Nm) electronic actuator is designed for digital or analog control of building HVAC dampers. Features • Brushless DC motor technology with stall protection • Bi-directional fail-safe spring return • Patented self-centering shaft coupling • Manual override • 160 lb-in (18 Nm) torque • 5° preload as shipped from factory • Offset and span adjustment models available • Models with independently adjustable dual auxiliary switches available • UL and cUL listed; certified Application These actuators are designed for use in constant or variable air volume installations for the control of return air, mixed air, exhaust, and face and bypass dampers requiring up to 160 lb-in (18 Nm) torque. They are designed for applications that require the damper to return to a fail-safe position when there is a power failure. Technical Instructions OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Document No. 155-173P25 June 22, 2015 Page 2 Siemens Industry, Inc. Product Numbers Table 1. Operating Voltage Control Cables Built-in Control Options Product Number 24 Vac ± 20% 24 Vdc ±10% 120 Vac ± 10% 0 to 10 Vdc 2 to 10 Vdc or 0 to 10 Vdc Floating 2 - position Standard Plenum Position Feedback Dual Auxiliary Switches Signal Inversion Offset 0 to 5 Vdc Span 2 to 30 Vdc GCA121.1U ● ● ● ● GCA121.1P ● ● ● ● GCA126.1U ● ● ● ● ● GCA126.1P ● ● ● ● ● GCA221.1U ● ● ● GCA226.1U ● ● ● ● GCA131.1U ● ● ● ● GCA131.1P ● ● ● ● GCA132.1U ● ● ● ● ● GCA136.1U ● ● ● ● ● GCA136.1P ● ● ● ● ● GCA151.1U ● ● ● ● ● ● GCA151.1P ● ● ● ● ● ● GCA156.1U ● ● ● ● ● ● ● GCA156.1P ● ● ● ● ● ● ● GCA161.1U ● ● ● ● ● GCA161.1P ● ● ● ● ● GCA163.1U ● ● ● ● ● ● GCA163.1P ● ● ● ● ● ● GCA164.1U ● ● ● ● ● ● ● GCA164.1P ● ● ● ● ● ● ● GCA166.1U ● ● ● ● ● ● GCA166.1P ● ● ● ● ● ● Warning/Caution Notations WARNING: Personal injury/loss of life may occur if you do not perform a procedure as specified. CAUTION: Equipment damage may occur if you do not perform a procedure as specified. OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Technical Instructions Document No. 155-173P25 June 22, 2015 Siemens Industry, Inc. Page 3 Specifications 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 Conformity UL listed to UL60730 (to replace UL873) cUL certified to Canadian Standard C22.2 No. 24-93 Electromagnetic compatibility (EMC) 2004/108/EC Immunity for all models, except GCA132.xx EN61000-6-2 Immunity for GCA132.xx EN61000-6-1 Emissions for all models EN61000-6-3 Power Supply GCA16x GCA15x GCA13x GCA12x GCA22x 24 Vac ± 20% 24 Vdc ± 10% 24 Vac ± 20% 24 Vdc ± 10% 24 Vac± 20% 24 Vdc ± 10% 24 Vac ± 20% 24 Vdc ± 10% 120 Vac ± 10% — Frequency 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz Power Consumption running 7 VA/5W 7 VA/5W 7 VA/5W 7 VA/5W 8 VA holding 5 VA/3W 5 VA/3W 5 VA/3W 5 VA/3W 6 VA Control Signal GCA16x GCA15x GCA13x GCA12x GCA22x Input Signal (Y–G0) voltage input 0 to 10 Vdc (max. 35 Vdc) 0 to 10 Vdc or 2 to 10 Vdc (max. 35 Vdc) Floating 2-Position 2-Position input resistance >100K ohms >100K ohms — — — Feedback Signal GCA16x GCA15x GCA13x GCA12X GCA22x Position output signal (U-G0) voltage output 0 to 10 Vdc 0 to 10 Vdc 0 to 1000 ohms <10 Ma (GCA 132x only) Load <1W — — maximum output current ±1 mA +1 mA, -.5 mA — — — Function Running/spring return torque Operating with 24 Vac 160 lb-in (18 Nm) Maximum torque <360 lb-in (40 Nm) Runtime for 90° operating with motor 90 sec closing (on power loss) with spring return 15 seconds typical NOTE: At -25°F, spring return is 142 lb-in (16 Nm ). Equipment rating Class 2, in accordance with UL/CSA Technical Instructions OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Document No. 155-173P25 June 22, 2015 Page 4 Siemens Industry, Inc. Specifications, Continued Mounting Nominal angle of rotation 90° Maximum angular rotation 95° Shaft size 3/8-inch to 1-inch (8 mm to 25.6 mm) diameter 1/4-inch to 5/8-inch (6 to 18 mm) square Minimum shaft length 3/4-inch (20 mm) Auxiliary features Control signal adjustment Offset (start point) 0 Vdc to 5 Vdc Factory setting 0 Vdc Span 2 Vdc to 30 Vdc Dual auxiliary switches AC rating (Standard cable) 24 Vac to 250 Vac AC 6A resistive AC 2A FLA, 12 LRA AC rating (Plenum cable) 24 Vac AC 4A resistive AC 2A, FLA, 12 LRA DC rating (Standard/Plenum cable) 12 Vdc 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° WARNING: Apply only AC-line voltage from the same phase or only UL-Class 2 voltage 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 is permitted. Housing Enclosure NEMA 2, IP54 per EN 60 529 in vertical to horizontal 90° See Figure 17. NEMA 3R rated when installed with ASK75.1U Weather Shield in the vertical position. See Figure 18. See Accessories, Figure 9 . Material Die-cast aluminum alloy Gear lubrication Silicone-free OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Technical Instructions Document No. 155-173P25 June 22, 2015 Siemens Industry, Inc. Page 5 Miscellaneous Pre-cabled connection 18 AWG Cable length 3 feet (0.9 m) Noise level <45 dBA (running) 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 31. Weight 4.85 lb (2.2 kg) Actuator Components Figure 1. Modulating GCA Actuator. NOTE: Not all features are on all models. See Table 1 for a listing of features per model. Legend 1. Positioning scale for angle of rotation 2. Manual override wrench opening and direction of rotation arrow 3. DIP switches 4. Span adjustment 5. Offset (start point) adjustment 6. Gear train lock pin 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 14. Connection cables Technical Instructions OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Document No. 155-173P25 June 22, 2015 Page 6 Siemens Industry, Inc. Accessories NOTE: The control signal adjustment cannot be added in the field. Order the product number that includes the option(s). Figure 2. Floor Mount Kit. ASK71.1U: Allows foot mounting of OpenAir actuators. Should be used for in-the-air stream applications, and generally, anywhere a foot- mounted actuator can be mounted. Kit contains: • Crank arm for changing angular rotation into a linear stroke. • Support bearing ring to minimize side loading on the actuator’s output bearing. • Mounting bracket. • Required mounting fasteners. Figure 3. Frame Mount Kit. ASK71.2U: Allows mounting OpenAir actuators directly to damper frame. Should be used with louvers and vents and in applications where floor mount kit is not possible. Kit contains: • Crank arm for changing angular rotation into a linear stroke. • Support bearing ring to minimize side loading on the actuator’s output bearing. • Mounting bracket. • Required mounting fasteners. Figure 4. Crank Arm Kit. ASK71.3: Allows direct-coupled actuator to provide an auxiliary linear drive. Crank arm kit can be used to simultaneously drive a set of opposing or adjacent dampers with single actuator. Kit includes: • Crank arm to attach to the splined hub of the shaft adapter. • Other required mounting fasteners. Figure 5. Crank Arm Kit with Mounting Bracket. ASK71.4: Allows economical mounting of OpenAir actuator to a variety of surfaces. Kit should be used in applications where the actuator can be rigid-surface mounted and linear stroke output is required. Kit includes: • Crank arm to attach to the splined hub of the shaft adapter. • Mounting bracket. • Other required mounting fasteners. Figure 6. Tandem Mount Bracket. ASK73.1: Bracket provides an extended anti- rotation pin allowing two OpenAir actuators to directly drive a single damper shaft. Tandem mounting bracket for two GCA 2-position and floating control actuators mounted on the same side of the damper shaft. OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Technical Instructions Document No. 155-173P25 June 22, 2015 Siemens Industry, Inc. Page 7 Accessories, Continued Figure 7. Tandem Mount Bracket. ASK73.2U: Bracket provides an extended anti- rotation pin allowing two OpenAir modulating actuators to directly drive a single damper shaft. Tandem mounting bracket for two GCA16x (standard to 10 Vdc modulating control) Series Actuators mounted on the same side of the 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 Actuator with Master/Slave mode operation selected. Figure 8. Special Shaft Adapter. ASK74.1U: Shaft adapter will attach to a 1.05-inch (26.6 mm) diameter shaft; the standard self-centering adapter will accept up to a one-inch (25.4 mm) diameter shaft. • Adapter can be used for coupling to slightly oversized one-inch (25.4 mm) jackshafts. • Shaft adapter is 13/16-inches (20 mm) shorter than the height of the self- centering shaft adapter. Figure 9. NEMA 3R Weather Shield. ASK75.1U: GCA Actuators are UL listed to meet NEMA 3R requirements (a degree of protection against rain, sleet, snow and damage from external ice formation) when installed with ASK75.1U Weather Shield and outdoor-rated conduit fittings in the vertical position. For dimensions, see Figure 29. Figure 10. NEMA Type 4X Weather Shield. ASK75.7U: GCA 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. Technical Instructions OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Document No. 155-173P25 June 22, 2015 Page 8 Siemens Industry, Inc. Figure 11. Heater/Weather Shield Assembly. 985-106: Provides protection for GIB, GBB and GCA OpenAir actuators down to temperatures of -58°F (-50°C). Assembly includes: • Weather Shield • Heater Kit Figure 12. 499 Ohm Resistor Assembly Kit. 985-124 : Used for converting a 4 to 20 mA controller output signal into a 2 to 10 Vdc actuator signal. Service Parts 985-003 Position Indicators (10/pkg.) 985-004 Standard Shaft Adapter. 985-006 Anti-rotation (Mounting) Bracket. 985-008 Conduit Adapter, 1/2-inch (12 mm) for 1/2-inch NPT Connector. Figure 13. Orderable Service Parts. Operation GCA12x and GCA22x: 2-Position Control When power is applied, the actuator coupling moves toward the open position 90°. GCA13x: Floating Control A floating control signal controls the damper actuator. The actuator's angle of rotation is proportional to the length of time the signal is applied. A 24 Vac/dc control signal to Y1 causes the actuator coupling to rotate clockwise. A 24 Vac/dc control signal to Y2 causes the actuator coupling to rotate counterclockwise. With no control voltage, the damper actuator holds its position. GCA16x and GCA15x: Modulating Control A continuous 0 to 10 Vdc or 2 to 10 Vdc signal from a controller to wire Y operates the damper actuator. The angle of rotation is proportional (or inverse proportional) to the control signal. A 0 to 10 Vdc position feedback output signal between wires U and G0 (system neutral) monitors the position of the damper actuator. OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Technical Instructions Document No. 155-173P25 June 22, 2015 Siemens Industry, Inc. Page 9 In the event of a power failure or when the operating voltage is shut off, all actuator models will return to the 0 position. In the event of a blockage in a damper, actuators are overload protected over the full range to prevent damage to the actuators. Life expectancy An improperly tuned loop will cause excessive repositioning that will shorten the life of the actuator. Control Signal Adjustment GCA 163 and GCA164 The offset (start point) and span of the control signal can be adjusted. The offset, Uo, can be adjusted between 0 to 5 Vdc. The span, ∆U, can be adjusted between 2 to 30 Vdc. Ys Mechanical positioning range (100% = angle of rotation 90°) Yu Control signal Uo Offset (start point) ∆U Span Uo = 0V, ∆U = 2V The minimum working range for Ys = 100% 1. Uo = 5V, ∆U = 30V The maximum working range for Ys = 100% 2. Uo = 0V, ∆U ≈ 10V Factory setting Setting for 10V span 0V offset Figure 14. The Minimum and Maximum Control Signal Adjustment. Example: Open the actuator from 0% to 50% (45°) using a control signal of Umin = 2V to Umax = 10V. Calculating the value of ∆U: V16 50 2)(10 x 100 % in rotation of angle Working min) Umax (U %] [ 100 U= − = − =∆ Next >