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OpenAir™

Technical Instructions

Document No. 155-173P25

EA GCA-1

December 11, 2014

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.

Summary of content (23 pages)

PAGE 1
Technical Instructions Document No. 155-173P25 EA GCA-1 December 11, 2014 OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuators 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.
PAGE 2
Technical Instructions Document No. 155-173P25 December 11, 2014 OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Product Numbers Table 1. ● GCA126.1P ● ● ● ● ● 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.
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OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Technical Instructions Document No. 155-173P25 December 11, 2014 Specifications Ambient temperature operation storage and transport Ambient humidity (non-condensing) Ambient Conditions -25°F to 130°F (-32°C to 55°C) -40°F to 158°F (-40°C to 70°C) 95% rh UL listed to UL60730 (to replace UL873) cUL certified to Canadian Standard C22.2 No.
PAGE 4
Technical Instructions Document No. 155-173P25 December 11, 2014 Specifications, Continued OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Nominal angle of rotation Maximum angular rotation Shaft size Minimum shaft length 90° 95° 3/8-inch to 1-inch (8 mm to 25.
PAGE 5
OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Miscellaneous Pre-cabled connection Cable length Noise level Life cycle Dimensions Weight Technical Instructions Document No. 155-173P25 December 11, 2014 18 AWG 3 feet (0.9 m) <45 dBA (running) Designed for over 60,000 full strokes and a minimum of 1.5 million repositions at rated torque and temperature. See Figure 31. 4.85 lb (2.2 kg) Legend Actuator Components 1. Positioning scale for angle of rotation 2.
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Technical Instructions Document No. 155-173P25 December 11, 2014 Accessories OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator 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. Figure 3. Frame Mount Kit. Figure 4. Crank Arm Kit. Figure 5. Crank Arm Kit with Mounting Bracket. ASK71.1U: Allows foot mounting of OpenAir actuators.
PAGE 7
OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Accessories, Continued Figure 7. Tandem Mount Bracket. Technical Instructions Document No. 155-173P25 December 11, 2014 ASK73.2U: Bracket provides an extended antirotation 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.
PAGE 8
Technical Instructions Document No. 155-173P25 December 11, 2014 OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator 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 11. Heater/Weather Shield Assembly. 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.
PAGE 9
OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Technical Instructions Document No. 155-173P25 December 11, 2014 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.
PAGE 10
Technical Instructions Document No. 155-173P25 December 11, 2014 Settings OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Uo = 2Y; ∆U = 16V Umin = minimum control signal Umax = maximum control signal Figure 15. Example. Dual Auxiliary Switch GCAxx4, GCAxx6 Actuator rotary range with the shaft adapter mounted at position "0". Setting range for switches A and B Setting interval: 5° Switching hysteresis: 2° To change the settings of A and B: 1.
PAGE 11
OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Sizing Technical Instructions Document No. 155-173P25 December 11, 2014 The type of actuator required depends on several factors. 2 2 1. Obtain damper torque ratings (ft-lb/ft or Nm/m ) from the damper manufacturer. 2. Determine the area of the damper. 3.
PAGE 12
Technical Instructions Document No. 155-173P25 December 11, 2014 OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Mounting and Installation Figure 17. Acceptable NEMA 2, IP54 per EN 60 529 Mounting Positions. Figure 18. Only Acceptable Mounting Position for NEMA Type 3R Rating Using ASK75.1U Weather Shield.
PAGE 13
OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Technical Instructions Document No. 155-173P25 December 11, 2014 Flip the actuator to select either clockwise or counterclockwise fail-safe rotation of the damper shaft. Follow Steps 1, 2, and 3 of Table 3 to determine the correct actuator mounting orientation. Table 3. Actuator Mounting Orientation and Damper Control. Siemens Industry, Inc.
PAGE 14
Technical Instructions Document No. 155-173P25 December 11, 2014 OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Manual override Rotating Locking in place Releasing when power is absent Figure 19. Manual Override. Always turn the key in the direction of the arrow. CAUTION: When engaging the gear train lock pin, be careful to turn only about five degrees until you hear a click or meet slight resistance. Turning too far will strip the lock pin.
PAGE 15
OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Wiring Technical Instructions Document No. 155-173P25 December 11, 2014 All wiring must conform to NEC and local codes and regulations. Use earth ground isolating step-down Class 2 transformers. Do not use autotransformers. 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 other components used.
PAGE 16
Technical Instructions Document No. 155-173P25 December 11, 2014 OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator GCA15x.1x (0 to 10 Vdc or 2 to 10 Vdc) for Tandem Application (Master/Slave) Figure 22. Tandem Application DIP Switch Settings. Page 16 • After setting the 4th DIP switch for TM (tandem mount) on all actuators used in the tandem application, one actuator must be identified as the Master by selecting the "M" on the 5th DIP switch.
PAGE 17
OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Technical Instructions Document No. 155-173P25 December 11, 2014 Wire Designations Each wire has the standard symbol printed on it. See Table 4. Figure 23. GCA15x, GCA16x, Modulating Control. Figure 24. GCA12x, 2-Position Control. Figure 25. GCA13x, Floating Control. Figure 26. GCA22x, 2-Position Control. Figure 27. GCA15x.1x for Tandem Application (Master/Slave). Siemens Industry, Inc.
PAGE 18
Technical Instructions Document No. 155-173P25 December 11, 2014 OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Table 4. Wire Designations.
PAGE 19
OpenAir™ GCA Series Spring Return 160 lb-in Electric Damper Actuators Technical Instructions Document Number 155-173P25 December 11, 2014 4. Check the Auxiliary Switch B: Start-Up/ a. Set the DMM dial to ohms (resistance) or continuity check. Commissioning b. Connect wires S4 and S6 to the DMM. GCA12x (24 Vac/dc) The DMM should indicate open circuit or no resistance. GCA22x (120 Vac) c. Switch on Vac power.
PAGE 20
Technical Instructions Document No. 155-173P25 December 11, 2014 Start-Up/ Commissioning OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator 5. GCA13x (Continued) Check the Auxiliary Switch B: a. Set the DMM dial to ohms (resistance) or continuity check. b. Connect wires S4 and S6 to the DMM. The DMM should indicate an open circuit or no resistance. c. Apply a control signal (24 Vac/dc) to wire 6 (violet).
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OpenAir™ GCA Series Spring Return 160 lb-in Electric Damper Actuators Start-Up Commissioning GCA15x GCA16x (Continued) Technical Instructions Document Number 155-173P25 December 11, 2014 4. Check the Auxiliary Switch A: a. Set the DMM dial to ohms (resistance) or continuity check. b. Connect wires S1 and S3 to the DMM. The DMM should indicate open circuit or no resistance. c. Apply the input signal as in Step 1d, to wire 8 (gray).
PAGE 22
Technical Instructions Document Number 155-173P25 December 11, 2014 OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuators WARNING: To avoid injury or loss of life, pay attention to any hazardous voltage (for example, 120 Vac) when performing checks. Troubleshooting • Check that wires are connected correctly. • Check that offset (start point) and span are set correctly, if used. • Use a Digital Multimeter (DMM) to verify that the operating voltage is within range.
PAGE 23
OpenAir™ GCA Series Spring Return 160 lb-in Electric Damper Actuators Technical Instructions Document Number 155-173P25 December 11, 2014 Dimensions, Continued Figure 31. Dimensions of the GCA Actuator and Mounting Bracket in Inches (Millimeters). 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 Schweiz AG.