Siemens OpenAir GCA Series Owner's manual

Technical Instructions

OpenAir™

Document No. 155-173P25

EA GCA-1

January 26, 2011

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

January 26, 2011

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 ●●●●●

GCA132.1P ●●●●●

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 follow

a procedure as specified.

Page 2 Siemens Industry, Inc.

OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Technical Instructions

Document No. 155-173P25

January 26, 2011

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

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

Power

Supply

holding 5 VA/3W 5 VA/3W 5 VA/3W 5 VA/3W 6 VA

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

Control Signal

input resistance >100K ohms >100K ohms — — —

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

— —

Feedback

Signal

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

Siemens Industry, Inc. Page 3

Technical Instructions OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator

Document No. 155-173P25

January 26, 2011

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) dia.

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) Between 0 Vdc to 5 Vdc

Factory setting 0 Vdc

Span Between 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

Page 4 Siemens Industry, Inc.

OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Technical Instructions

Document No. 155-173P25

January 26, 2011

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 29.

Weight 4.85 lb (2.2 kg)

Country of Origin USA

Actuator

Components

EA1106R2

Offset, Uo

Span, DU

Gear Train

Lockpin

Manual

Override

2-10

0-10

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

Siemens Industry, Inc. Page 5

Technical Instructions OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator

Document No. 155-173P25

January 26, 2011

Accessories NOTE: The control signal adjustment cannot be added in the field. Order the

product number that includes the option(s).

EA0477R2

(4 each)

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.

EA0476R2

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.

EA0496R1

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.

Page 6 Siemens Industry, Inc.

OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Technical Instructions

Document No. 155-173P25

January 26, 2011

Accessories,

Continued

EA0740R1

Figure 7. Tandem Mount

Bracket.

ASK73.2U: Bracket provides an extended anti-

rotation pin allowing two OpenAir modulating

actuator to directly drive a single damper shaft.

(For GCA16x Series only.)

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.

EA0845R1

(14)

Figure 9. Weather Shield.

ASK75.1U: GCA actuators are UL listed to

meet NEMA 3R requirements (a degree of

protection against rain, sleet, 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 28.

Heating

Element

Thermostat

EA0992R1

Figure 10. 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

EA1089R1

Figure 11.

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.

Siemens Industry, Inc. Page 7

Technical Instructions OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator

Document No. 155-173P25

January 26, 2011

Service Parts

EA1059R1

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.

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, or 2 to 10 Vdc position feedback output signal is

available between wires U and G0 (system neutral) to monitor the position of the

damper actuator.

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.

Page 8 Siemens Industry, Inc.

OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator Technical Instructions

Document No. 155-173P25

January 26, 2011

Implementation of

DIP Switch Features

(GCA15x Only)

Counterclockwise

Self-adapt feature

2 to 10 Vdc

Tandem Mount

Master

Clockwise

Self-Adapt Off

0 to 10 Vdc

Single Mount

Slave

Figure 13. GCA15x Series.

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, ΔU, can be adjusted between

2 to 30 Vdc.

Ys Mechanical positioning range

(100% = angle of rotation 90°)

Yu Control signal

Uo Offset (start point)

ΔU Span

Uo = 0V, ΔU = 2V

The minimum working range for Ys = 100%

1. Uo = 5V, ΔU = 30V The maximum

working range for Ys = 100%

2. Uo = 0V, ΔU ≈10V Factory setting

Offset, Uo

Span, U

Control

Signals

Uo U

EA0287R1

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 ΔU:

V16

2)(10x100

%inrotationofangleWorking

min)Umax(U%][100

−

=Δ

Siemens Industry, Inc. Page 9

Technical Instructions OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator

Document No. 155-173P25

January 26, 2011

Settings Uo = 2Y; ΔU = 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. Make sure the actuator is in the "0", fail-

safe position. The scale is valid only in

the "0" position.

2. Use a flat-blade screwdriver to turn the

switch adjustment dials to the desired

setting at which a signal is to be given.

Factory setting:

Switch A 5°

Switch B 85°

AUX

SWITCH

ADJ 20

EA0277R3

Manual

Override

Figure 16. Dual Auxiliary Switch

Dials.

NOTE: For GCA15x actuators with signal inversion switch set to Inverse Acting,

90° corresponds to either a 0 to 10 Vdc or a 2 to 10 Vdc. Vdc input signal

depends on the input signal selection.

Page 10 Siemens Industry, Inc.

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