Siemens OpenAir GCA Series Betriebsanleitung

OpenAir™

Technical Instructions

Document No. 155-173P25

EA GCA-1

March 17, 2006

GCA Series Spring Return 142 lb-in

Electronic Damper Actuators

Siemens Building Technologies, Inc.

Description

The OpenAir 24 Vac/dc spring return 142 lb-in 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

•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

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 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 OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator

Document No. 155-173P25

March 17, 2006

Page 2 Siemens Building Technologies, Inc.

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

3-position

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.

OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Technical Instructions

Document No. 155-173P25

March 17, 2006

Siemens Building Technologies, Inc. Page 3

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 UL listed to UL60730

(to replace UL873)

cUL certified to Canadian Standard

C22.2 No. 24-93

Power

Supply GCA16x GCA15x GCA13x GCA12x GCA22x

Operating

Voltage

(G-G0)

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 9 VA/7W 9 VA/7W 8 VA/6W 8 VA/6W 9 VA

holding 5 VA/7W 5 VA/4W 5 VA/4W 3 VA/3W 9 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)

3-Position 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 142 lb-in (16 Nm)

Maximum torque <360 lb-in (40 Nm)

Runtime for 90°

operating with motor 90 seconds

closing (on power loss) with spring return 15 seconds typical

Equipment rating Class 2, in accordance with UL/CSA

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)

Technical Instructions OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator

Document No. 155-173P25

March 17, 2006

Page 4 Siemens Building Technologies, Inc.

Specifications,

continued

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, 12LRA

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.

OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Technical Instructions

Document No. 155-173P25

March 17, 2006

Siemens Building Technologies, Inc. Page 5

Specifications,

continued

Housing

Enclosure NEMA 2 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

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)

Actuator

Components

EA0377R1

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

Technical Instructions OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator

Document No. 155-173P25

March 17, 2006

Page 6 Siemens Building Technologies, Inc.

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.

EA0495R1

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.

EA0494R1

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.

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.)

OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Technical Instructions

Document No. 155-173P25

March 17, 2006

Siemens Building Technologies, Inc. Page 7

Accessories,

Continued

EA0497R1

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.

Service Parts

EA0499R1

EA0498R1

EA0500R1

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.

Technical Instructions OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator

Document No. 155-173P25

March 17, 2006

Page 8 Siemens Building Technologies, Inc.

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. 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.

Implementation of

DIP Switch Features

(GCA15x Only)

Counter Clockwise

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.

OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator Technical Instructions

Document No. 155-173P25

March 17, 2006

Siemens Building Technologies, Inc. Page 9

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.

100

ΔU (max. 30 V) Y

(v)

(%)

EA0411R1

2 5 10 35

2)1) 3)

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

Settings Uo = 2Y; ΔU = 16V

Umin = minimum control signal

Umax = maximum control signal

100

ΔU (16 V)

(v)

(%)

21810

Umin Umax

EA0412R1

Figure 15. Example.

Technical Instructions OpenAir GCA Series Spring Return 142 lb-in Electronic Damper Actuator

Document No. 155-173P25

March 17, 2006

Page 10 Siemens Building Technologies, Inc.

Dual Auxiliary Switch GCAxx4, GCAxx6

-5°0°10°20°30°70°80°90°

0°10°20°30°70°80°90°

EA0413R2

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°

B90

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.

Sizing The type of actuator required depends on several factors.

1. Obtain damper torque ratings (ft-lb/ft2or Nm/m2) from the damper manufacturer.

2. Determine the area of the damper.

3. Calculate the total torque required to move the damper:

Total Torque = SF

AreaDamperRatingTorque

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, etc. A

suggested safety factor is 0.80.

4. Select the actuator type using Table 2.

NOTE: Mechanically coupled actuators must all be of the exact same type except for the dual

auxiliary switches and feedback potentiometer options. Make sure to use the correct

tandem-mounting bracket. See Table 2.

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