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Technical Instructions

OpenAir™

Document No. 155-173P25

EA GCA-1

November 5, 2012

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 November 5, 2012 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 November 5, 2012 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 ● ● ● GCA164.1U ● ● ● GCA164.
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OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Technical Instructions Document No. 155-173P25 November 5, 2012 Specifications Ambient Conditions Ambient temperature operation storage and transport Ambient humidity (non-condensing) -25°F to 130°F (-32°C to 55°C) -40°F to 158°F (-40°C to 70°C) 95% rh Agency Certification UL listed to UL60730 (to replace UL873) cUL certified to Canadian Standard C22.2 No.
PAGE 4
Technical Instructions Document No. 155-173P25 November 5, 2012 Specifications, Continued OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Nominal angle of rotation Maximum angular rotation Shaft size Mounting Auxiliary features Minimum shaft length Control signal adjustment Offset (start point) Factory setting Span Dual auxiliary switches AC rating (Standard cable) AC rating (Plenum cable) DC rating (Standard/Plenum cable) 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 Technical Instructions Document No. 155-173P25 November 5, 2012 Pre-cabled connection Cable length Noise level Life cycle 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 29. 4.85 lb (2.2 kg) Dimensions Weight Legend Actuator Components 1. Positioning scale for angle of rotation 10 9 1 2.
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Technical Instructions Document No. 155-173P25 November 5, 2012 NOTE: The control signal adjustment cannot be added in the field. Order the product number that includes the option(s). EA0477R2 Accessories OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator (4 each) EA0476R2 Figure 2. Floor Mount Kit. Figure 3. Frame Mount Kit. Figure 4. Crank Arm Kit. EA0496R1 Figure 5. Crank Arm Kit with Mounting Bracket. ASK71.1U: Allows foot mounting of OpenAir actuators.
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OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator EA0740R1 Accessories, Continued Figure 7. Tandem Mount Bracket. Technical Instructions Document No. 155-173P25 November 5, 2012 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 November 5, 2012 OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator EA1059R1 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 12. Orderable Service Parts.
PAGE 9
OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Control Signal Adjustment Technical Instructions Document No. 155-173P25 November 5, 2012 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, ΔU, can be adjusted between 2 to 30 Vdc.
PAGE 10
Technical Instructions Document No. 155-173P25 November 5, 2012 Settings OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Uo = 2Y; ΔU = 16V Umin = minimum control signal Umax = maximum control signal Figure 14. 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 November 5, 2012 The type of actuator required depends on several factors. 1. Obtain damper torque ratings (ft-lb/ft2 or Nm/m2) from the damper manufacturer. 2. Determine the area of the damper. 3.
PAGE 12
Technical Instructions Document No. 155-173P25 November 5, 2012 OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Mounting and Installation <9 0˚ < 90 ˚ 90 ˚ Figure 16. Acceptable NEMA 2, IP54 per EN 60 529 Mounting Positions. EA1105R1 EA1104R1 NEMA 2 90˚ Figure 17. 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 November 5, 2012 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.
PAGE 14
Technical Instructions Document No. 155-173P25 November 5, 2012 OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Manual override 90˚ 90˚ 90˚ 3 x 7-3/4 = 90˚ 2 Manual Override HOLD 1 Manual Override TRAIN GEAR PIN LOCK Manual Override 5 TRAIN GEAR PIN LOCK h EA0374R3 3 mm 6 7 8 TRAIN GEAR PIN LOCK 4 Rotating Locking in place Releasing when power is absent Figure 18. Manual Override. Always turn the key in the direction of the arrow.
PAGE 15
OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Wiring Technical Instructions Document No. 155-173P25 November 5, 2012 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 November 5, 2012 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) 0 0-10 TM SM EA1216R1 2-10 M S Figure 21. 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 November 5, 2012 Wire Designations Each wire has the standard symbol printed on it. See Table 4. INPUT 8 OUTPUT 9 DUAL AUXILIARY SWITCHES SUPPLY 1 COMMON COMMON S1 S4 SWITCH A SWITCH B M DUAL AUXILIARY SWITCHES COMMON COMMON S1 S4 SWITCH A SWITCH B S2 S5 S2 1 2 S3 N.C. N.O. S5 S6 EA0864R1 EA0867R1 M N.C. N.O. SUPPLY NEUTRAL Figure 22.
PAGE 18
Technical Instructions Document No. 155-173P25 November 5, 2012 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 November 5, 2012 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
OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Start-Up/ Commissioning 5. GCA13x (Continued) Technical Instructions Document No. 155-173P25 November 5, 2012 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).
PAGE 21
OpenAir™ GCA Series Spring Return 160 lb-in Electric Damper Actuators Start-Up Commissioning GCA15x GCA16x (Continued) Technical Instructions Document Number 155-173P25 November 5, 2012 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 November 5, 2012 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 November 5, 2012 Dimensions, Continued min. 4 in. 100 mm 3-1/16 in. 78 mm MAX 3/4 in. 20 mm 1-1/8 in. 28 mm 11-13/16 in. 300 mm 3-3/8 in. 86 mm min. 8 in. min. 1/4 in. 7 mm 200 mm 7-3/4 in. 197 mm 1 in. 25 mm 5/32 in. 4 mm 1-11/32 1-11/32 34 mm 34 mm 3-15/16 in. min. 2-1/2 in. 60 mm 100 mm EA1087R1 OPENING FOR 3/8" FLEX CONDUIT (3 PLS) 11/32 in. 10 mm 1-23/32 in.