OpenAir ® GPC Series Technical Instructions Document No. 155-782 February 26, 2019 Spring Return, 35 lb-in (4 Nm), Rotary Electronic Damper Actuators Siemens Industry, Inc. Description The OpenAir GPC Series direct-coupled spring return electronic actuator is designed for modulating, two-position, and floating control of building HVAC dampers. Features • Bi-directional spring return (fail-safe) • Pre-cabled • Plenum-rated models available • Optional built-in auxiliary switches with fixed switch points at 5° and 85° rotation • Control signal selectable 0 to 10 Vdc or 2 to 10 Vdc • 60-second run time • 35 lb-in (4 Nm) torque • Signal inversion capability on modulating types (0(2) to 10 Vdc or 10 to 0(2) Vdc) • UL and cUL listed, CE certified • Compact footprint • Low voltage models are 24 Vac/dc compatible • New line voltage models, 100 to 240 Vac compatible. • Integrated 1/2" NPT conduit connection Application Used in small HVAC dampers and economizer dampers, and constant or variable air volume installations for the control of return air, mixed air, exhaust, and face and bypass, and residential zone dampers requiring up to 35 lb-in (4 Nm) torque. Designed for applications that require the damper to return to a fail-safe position when there is a power failure. Product Numbers Table 1. Product Number * Torque Voltage Control Signals Feedback 0(2) to 10 Vdc/10 to 0(2) Vdc Plenum Cabling Appliance Cable Auxiliary Switch 35 lb - in 24 Vac/dc 100 to 240 Vac 2 - Position Floating Modulating 0(2) to 10 Vdc/10 to 0(2) Vdc GPC121.1P   —  — — —  — — GPC126.1P    — — —  —  GPC131.1P   — —  — —  — — GPC136.1P   — —  — —  —  GPC161.1P   — — —    — — GPC166.1P   — — —    —  GPC321.1U  —   — — — —  — GPC326.1U  —   — — — —   Technical Instructions OpenAir ® GPC Series, Spring Return, 35 lb-in, Rotary, Electronic Damper Actuators Document Number 155-782 February 26, 2019 Page 2 Siemens Industry, Inc. Warning/Caution Notations WARNING: Personal injury or 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. Actuator Components Figure 1. Components of the GPC Spring Return Actuator. Specifications Power Supply Operating voltage 24 Vac ± 20%, 24 Vdc ± 20% 100 and 240 Vac -15% + 10% Frequency 50/60 Hz Power consumption Running Holding GPC12x @ 24 Vac, 60 Hz 3.4 VA (2.0W) 2.6 VA (1.6W) GPC13x @ 24 Vac, 60 Hz 3.5 VA (2.1W) 2.8 VA (1.7W) GPC16x @ 24 Vac, 60 Hz 3.5 VA (2.1W) 2.8 VA (1.6W) GPC32x @120 Vac, 60 Hz 4.6 VA (2.4W) 3.5 VA (1.7W) Equipment Rating 24 Vac/Vdc Class 2, in accordance with UL/CSA Class III per IEC 60536 100 to 240 Vac Double insulation Auxiliary Switch Rating Fixed dual end switches AC rating 24 Vac to 250 Vac/24 Vdc 6A resistive/2 FLA/12 LRA OpenAir ® GPC Series, Spring Return, 35 lb-in, Rotary Electronic Damper Actuators Technical Instructions Document Number 155-782 February 26, 2019 Siemens Industry, Inc. Page 3 Specifications, Continued Control Signal Input signal (wires 8–2) voltage input signal (GPC16x.1P) 0(2) to 10 Vdc (max. 35 Vdc) input resistance >100K ohms Feedback Signal Position output signal (wires 9–2) voltage output signal (GPC16x.1P) 0(2) to 10 Vdc maximum output current ±1 mA Function Running/spring return torque 35 lb-in (4 Nm) Maximum torque 88 lb-in (10 Nm) Runtime for 90° operating with motor 60 seconds closing (on power loss) with spring return 15 seconds typical Mounting Nominal angle of rotation 90° Maximum angular rotation 95° Shaft size 3/8 to 1/2-inch (8 to 13 mm) dia. 1/4 to 7/16-inch (6 to 11 mm) square Minimum shaft length 3/4-inch (20 mm) Housing Enclosure NEMA 1 IP54 Material Plenum-rated rugged plastic Gear lubrication Silicone-free 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 UL listed per UL 60730 cUL to CSA 60730 NOTE: These devices were approved for installation in plenum areas by Underwriters Laboratories, Inc. (UL) per UL 2043. Conformity FCC Conformity Australia Conformity EMC, ROHS2 and Low Voltage Directives Part 15 Class B Emissions RCM Requirements Miscellaneous Pre-cabled connection 18 AWG (0.75 mm2) Cable length 3 feet (0.9 m) length Life cycle Designed for minimum of 100,000 full stroke cycles and a minimum of 5 million repositions at rated torque and temperature Dimensions 5.61" H × 2.83" W × 2.48" D (142.6 mm H ×72 mm W × 63 mm D) Weight 1.32 lbs. (0.60 kg) Technical Instructions OpenAir ® GPC Series, Spring Return, 35 lb-in, Rotary, Electronic Damper Actuators Document Number 155-782 February 26, 2019 Page 4 Siemens Industry, Inc. Accessories Figure 2. NEMA Type 4X Weather Shield. ASK75.7U: GPC 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 12. Service Parts Figure 3. 985-055P24 Anti-rotation Bracket (Mounting). Figure 4. 985-124 499-ohm Resistor Assembly Kit for 4 to 20 mA Applications. Operation GPC16x.1P Apply a continuous 0(2) to 10 Vdc control signal between wire 8 (Y) and wire 2 (G0) to operate the damper actuator. The angle of rotation is proportional to the control signal. A 0(2) to 10 Vdc position feedback output signal is available between wire 9 (U) and wire 2 (G0) to monitor the position of the damper motor. In the event of a power failure or when the operating voltage is shut off, the actuator returns to the "0" position. GPC 12x.1P and GPC32x.1U When power is applied, the actuator coupling moves toward the open position "90°". In the event of a power failure or when the operating voltage is shut off, the actuator returns to the "0" position. GPC13x.1P 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 wire 6 (Y1) causes the actuator coupling to rotate clockwise. A 24 Vac/dc control signal to wire 7 (Y2) causes the actuator coupling to rotate counterclockwise. With no control voltage, the damper actuator holds its position. In the event of a power failure, the actuator will return to the 0 position. Overload Protection In the event of a blockage in the damper, the actuator is overload protected over the full range to prevent damage to the actuator. Life Expectancy An improperly tuned loop will cause excessive repositioning that will shorten the life of the actuator. OpenAir ® GPC Series, Spring Return, 35 lb-in, Rotary Electronic Damper Actuators Technical Instructions Document Number 155-782 February 26, 2019 Siemens Industry, Inc. Page 5 Sizing The type of actuator required depends on several factors: 1. Obtain damper torque ratings (lb-in/ft 2 or Nm/m 2 ) from the damper manufacturer. 2. Determine the area of the damper. 3. Calculate the total torque required to move the damper: Total Torque = SF AreaDamper Rating Torque 1  4. Select a spring return actuator using Table 1. 1 Safety Factor: When calculating the total torque required, a safety factor should be included for unaccountable variables such as slight misalignments, aging of the damper, and so on. A suggested safety factor is 0.80. Table 2. Sizing. Total Torque Actuator  20 lb-in (  2Nm) GQD > 20 lb-in < 35 lb-in (> 2 Nm < 4 Nm) GPC >35 lb-in  62 lb-in (>4 Nm  7 Nm) GMA >62 lb-in  160 lb-in (>7 Nm  18 Nm) GCA >160 lb-in  320 lb-in (>18 Nm  36 Nm) Tandem GCA ASK73.2U*: Tandem mounting bracket with any combination of GCA16x. ASK73.1U*: Tandem mounting bracket for all other GCAx actuators. *NOTE: Mechanically coupled actuators must be of the exact same type. Use the correct mounting bracket. Mounting and Installation • The shaft adapter can be mounted on either side of the actuator. The actuator mounting orientation and shaft length determine how they will be mounted on the actuator. • The minimum damper drive shaft length is 3/4-inch (20 mm). • See Specifications for the minimum and maximum damper shaft dimensions. • A mounting bracket is included with the actuator. • See the detailed installation instructions included with each actuator. Auxiliary Switches Switch Switch Makes Switch Breaks A (fixed 5°) < 5° > 5° B (fixed 85°) > 85° < 85° NOTE: Both sets of contacts are open when actuator is between 5° and 85°. Switches may be wired in a Normally Closed or Normally Open position. CAUTION: Mixed switch operation to the switching outputs of both dual end switches (5° and 85°) is not permitted. Either AC line voltage from the same phase must be applied to all four outputs of the fixed dual end switches, or UL-Class 2 voltage must be applied to all four outputs. Technical Instructions OpenAir ® GPC Series, Spring Return, 35 lb-in, Rotary, Electronic Damper Actuators Document Number 155-782 February 26, 2019 Page 6 Siemens Industry, Inc. DIP Switch Functionality GPC 161 NOTE: The black position indicates the active switch setting. Description Label Description Function 2 to 10 Vdc 0 to 10 Vdc Control signal selection Not In Use Inverse Acting Direct-Acting Input signal inversion Figure 5. DIP Switches. Control Signal Selection Selects the control and feedback signals Input Signal Inversion Allows inverting the control input signal The arrow direction indicates opening or closing (closing or opening) when operating an actuator with a given control signal. = Direct acting (Factory setting) Input signal 0 Vdc ► fail-safe position = Inverse acting Input signal 10 Vdc ► fail-safe position 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. 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 one transformer power no more than 10 actuators (or 80% of its VA). WARNING: Installations requiring Conformance: • All wiring for 24 Vac/dc actuators must only be safety extra-low voltage (SELV) or protective extra-low voltage (PELV) per HD384. • Use safety transformers per EN61558 with double isolation, designed for 100% duty-cycle for supplying SELV or PELV circuits. • Over-current protection for supply lines is maximum 10A. OpenAir ® GPC Series, Spring Return, 35 lb-in, Rotary Electronic Damper Actuators Technical Instructions Document Number 155-782 February 26, 2019 Siemens Industry, Inc. Page 7 Wire Designations Each wire has the standard symbol printed on it. See Table 3. Table 3. Wire Designations. Applicable Actuator Standard Symbol Function Terminal Designations Color 24 Vac/dc 1 Supply (SP) G Red 2 Neutral (SN) G0 Black 6 Control signal clockwise (CW) Y1 Violet 7 Control signal counterclockwise (CCW) Y2 Orange 8 Input signal: 0(2) to 10 Vdc or 10 to 0(2) Vdc Y Gray 9 Position output: 0(2) to 10 Vdc or 10 to 0(2) Vdc U Pink 100 to 240 Vac 3 Supply L Brown 4 Neutral N Light Blue Auxiliary Switches S1 Switch A − Common S1 Gray/Red S2 Switch A − N.O. S2 Gray/Blue S3 Switch A − N.C. S3 Gray/Pink S4 Switch B − Common S4 Black/Red S5 Switch B − N.O. S5 Black/Blue S6 Switch B − N.C. S6 Black/Pink Wiring Diagrams GPC12x 24 Vac/dc 2-Position Control Figure 6. Class III GPC13x 24 Vac/dc Floating Control Figure 7. Class III Technical Instructions OpenAir ® GPC Series, Spring Return, 35 lb-in, Rotary, Electric Damper Actuators Document Number 155-782 February 26, 2019 Page 8 Siemens Industry, Inc. Wiring Diagrams, Continued GPC16x 24 Vac/dc Modulating Control Figure 8. Class III GPC32x 100 to 240 Vac 2-Position Control Figure 9. Special Applications GPC16x 4 to 20 mA Figure 10. GPC16x 4 to 20 mA Applications. OpenAir ® GPC Series, Spring Return, 35 lb-in, Rotary, Electronic Damper Actuators Technical Instructions Document Number 155-782 February 26, 2019 Siemens Industry, Inc. Page 9 Start-Up/ Commissioning GPC16x Spring Return Modulating Control 24 Vac/dc 1. Check Operation: a. Connect wires 1 (red) and 2 (black) to the 24 Vac/dc power supply. NOTE: With no input signal present, the GPC16x.1P Actuator with input signal inversion switch set to Inverse Acting, will start driving towards 90°. b. Use a Digital Multimeter (DDM) and set the dial to Vdc for the actuator input signal. c. Connect wires 2 (black) and 8 (gray) to the DMM. d. Apply to input signal wire 8 (gray): Y = 10 Vdc (GPC16x.1P with input signal inversion switch set to Direct Acting). Y = 0 Vdc (GPC16x.1P with input signal inversion switch set to Inverse Acting). Allow the actuator shaft coupling to rotate from 0° to 90°. e. Apply to input signal wire 8 (gray): Y = 0 Vdc (GPC16x.1P with input signal inversion switch set to Direct Acting). Y = 10 Vdc (GPC16x.1P) with input signal inversion switch set to Inverse Acting). The shaft coupling returns to the 0 position. 2. Check Spring Return: a. Set the DMM dial to Vdc. b. Connect wires 2 (black) and 8 (gray) to the DMM. c. Apply to input signal wire 8 (gray): Y = 5 Vdc (GPC16x.1P). Allow the actuator shaft coupling to rotate halfway. d. Disconnect wire 1 (red). The spring returns the actuator shaft coupling to the fail-safe "0" position. e. Connect wire 1 (red) and the actuator moves. 3. Check Feedback: a. Set the DMM dial to Vdc. b. Attach wires 2 (black) and 9 (pink) to the DMM. c. Apply the input signal as in Step 1d, to wire 8 (gray). • The reading at the DMM should increase (decrease for GPC16x.1P with output signal inversion switch set to Inverse Acting Feedback). • The reading at the DMM should decrease (increase for GPC16x.1P with output signal inversion switch set to Inverse Acting Feedback) and the actuator shaft coupling returns to the fail-safe 0 position. GPC12x Spring Return 2-Position 24 Vac/dc 1. Check Operation: a. Connect wires 1 (red) and 2 (black) to 24 Vac/dc power supply. Allow the actuator shaft coupling to rotate from 0° to 90°. b. Disconnect wire 1 (red) and the actuator shaft coupling returns to the "0" position. 2. Check Spring Return: a. Connect wire 1 (red). Allow the actuator shaft coupling to rotate halfway. b. Disconnect wire 1 (red). The spring returns the actuator shaft coupling to the fail-safe 0 position. Next >