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Siemens OpenAir GCA Series Technical Instructions

Spring return 142 lb-in electronic damper actuators
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OpenAir™
GCA Series Spring Return 142 lb-in
Electronic Damper Actuators
Description
Features
Application
The OpenAir 24 Vac/dc spring return 142 lb-in electronic actuator is designed for digital
or analog control of building HVAC dampers.
•
Brushless DC motor technology with stall protection
•
Bi-directional fail-safe spring return
•
Patented self-centering shaft coupling
•
Manual override
•
142 lb-in (16 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
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 142 lb-in (16 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
Document No. 155-173P25
Siemens Building Technologies, Inc.
EA GCA-1
March 17, 2006

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Summary of Contents for Siemens OpenAir GCA Series

  • Page 1 142 lb-in (16 Nm) torque. They are designed for applications that require the damper to return to a fail-safe position when there is a power failure. Siemens Building Technologies, Inc.

  • Page 2: Product Numbers

    Technical Instructions OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Document No. 155-173P25 March 17, 2006 Product Numbers Table 1. Built-in Operating Control Cables Control Voltage Options Product Number GCA121.1U ● ● ● ● GCA121.1P ● ● ●...

  • Page 3: Specifications

    OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Technical Instructions Document No. 155-173P25 March 17, 2006 Specifications Ambient temperature Ambient conditions 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)
  • Page 4 Technical Instructions OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Document No. 155-173P25 March 17, 2006 Control signal adjustment Specifications, Offset (start point) Between 0 Vdc to 5 Vdc continued Factory setting 0 Vdc Auxiliary features Span Between 2 Vdc to 30 Vdc...

  • Page 5: Actuator Components

    OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Technical Instructions Document No. 155-173P25 March 17, 2006 Enclosure NEMA 2 in vertical to horizontal 90° Specifications, See Figure 17. continued NEMA 3R rated when installed with ASK75.1U Weather Shield in the vertical position.
  • Page 6 Technical Instructions OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Document No. 155-173P25 March 17, 2006 Accessories The control signal adjustment cannot be added in the field. Order the product number that NOTE: includes the option(s). ASK71.1U: Allows foot mounting of OpenAir actuators.

  • Page 7: Service Parts

    OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Technical Instructions Document No. 155-173P25 March 17, 2006 ASK74.1U: Shaft adapter will attach to a 1.05-inch Accessories, (26.6 mm) diameter shaft; the standard self-centering Continued adapter will accept up to a one-inch (25.4 mm) diameter shaft.

  • Page 8: Operation

    Technical Instructions OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Document No. 155-173P25 March 17, 2006 Operation GCA12x and GCA22x: 2-Position Control When power is applied, the actuator coupling moves toward the open position 90°. GCA13x: 3-Position Control A floating control signal controls the damper actuator.
  • Page 9 OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Technical Instructions Document No. 155-173P25 March 17, 2006 Control Signal GCA 163 and GCA164 Adjustment The offset (start point) and span of the control signal can be adjusted. The offset, Uo, can be adjusted between 0 to 5 Vdc.
  • Page 10 Technical Instructions OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Document No. 155-173P25 March 17, 2006 Dual Auxiliary Switch GCAxx4, GCAxx6 Actuator rotary range with the shaft -5° 0° 10° 20° 30° 70° 80° 90° adapter mounted at position "0".

  • Page 11: Mounting And Installation

    OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Technical Instructions Document No. 155-173P25 March 17, 2006 Table 2. Sizing Total Torque Actuator <62 lb-in (7 Nm) >62 lb-in <142 lb-in (>7 Nm <16 Nm) >142 lb-in <284 lb-in ASK73.2U*: Tandem mounting bracket with any...
  • Page 12 Technical Instructions OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Document No. 155-173P25 March 17, 2006 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.

  • Page 13: Manual Override

    OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Technical Instructions Document No. 155-173P25 March 17, 2006 Manual override 90˚ x 7-3/4 = 90˚ HOLD 3 mm Rotating Locking in place Releasing when power is absent Figure 19. Manual Override.
  • Page 14 Technical Instructions OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Document No. 155-173P25 March 17, 2006 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.
  • Page 15 OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Technical Instructions Document No. 155-173P25 March 17, 2006 Wire Designations Each wire has the standard symbol printed on it. See Table 4. DUAL AUXILIARY DUAL AUXILIARY SWITCHES SWITCHES INPUT OUTPUT...
  • Page 16 Technical Instructions OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Document No. 155-173P25 March 17, 2006 Table 4. Wire Designations. Standard Terminal Color Symbol Designations Function Standard Plenum Supply (SP) Neutral (SN) Black Black Line (120 Vac) Black...
  • Page 17 OpenAir GCA Series Spring Return 142 lb-in Electric Damper Actuators Technical Instructions Document Number 155-173P25 March 17, 2006 1. Check Operation: Start-Up/ a. Switch on 24 Vac/dc power (or 120 Vac GCA22x). Commissioning b. Allow the actuator shaft coupling to rotate from 0 to 90°.
  • Page 18 Technical Instructions OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuators Document Number 155-173P25 March 17, 2006 Check Operation: Start-Up/ Connect wires 1 (red) and 2 (black) to 24 Vdc power supply. Commissioning, Apply a control signal (24 Vac/dc) to wire 6 (violet).
  • Page 19 OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuators Technical Instructions Document Number 155-173P25 March 17, 2006 Check Operation: Start-Up/ Connect wires 1 (red) and 2 (black) to the 24 Vac Commissioning, or 24 Vdc power supply. Continued— NOTE: With no input signal present, the GCA15x actuator with signal GCA15x inversion switch set to Inverse Acting will start driving towards 90°.

  • Page 20: Troubleshooting

    Technical Instructions OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuators Document Number 155-173P25 March 17, 2006 5. Check the Auxiliary Switch B: Start-Up a. Set the DMM dial to ohms (resistance) or continuity check. Commissioning, GCA15X b. Connect wires S4 and S6 to the DMM. The DMM should indicate open circuit or no resistance.
  • Page 21 OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuators Technical Instructions Document Number 155-173P25 March 17, 2006 Dimensions 4-3/16 (106) OPENING FOR STANDARD 1/2" CONDUIT CONNECTOR (2) ∅ 8-1/4 1.04 (210) (26.5) 1-3/8 (35) 15-3/8 4-1/16 (390) (103) Figure 28. Dimensions of the ASK75.1U Weather Shield in Inches (Millimeters).

This manual is also suitable for:

Openair gca121.1uOpenair gca121.1pOpenair gca126.1uOpenair gca126.1pOpenair gca221.1uOpenair gca226.1u ... Show all

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