Siemens ASC77.2U Manuale utente

Installation Instructions

Document No. 129-420

December 13, 2004

OpenAir™ External Auxiliary Switch

EA1175R1

a. External dual auxiliary switch

b. Position indicator

c. GCA/GBB/GIB position adapter

d. GMA/GEB position adapter

e. 3 mm hex key

f. Plastic mounting adapter inserts (2)

g. Threaded M5 × 25 screws (2)

Figure 1. External Auxiliary Switch Kit Contents.

Product Description

The OpenAir External Auxiliary Switch (EAS) provides

switch functionality for standard model damper actuators

with easy installation for in-service units.

Product Number

ASC77.2U

Specifications

Dual Auxiliary Switches

24 Vac to 250 Vac

AC 6A resistive

AC rating

AC 2 FLA, 12 LRA

12 Vdc to 30 Vdc

DC rating DC 2A

Insulation system Double insulated

Switch range

Switch A 0° to 90° with 5° intervals

Recommended

usage 0° to 45°

Switch B 0° to 90° with 5° intervals

Recommended

usage 45° to 90°

Switching hysteresis 2°

UL listed to UL 873

cUL certified to Canadian

Standard C22.2

No. 24-93

Electromagnetic

compatibility 89/336/EEC

Agency certification

Low voltage directive

73/23/EEC

Conduit Connection Threaded 1/2-inch

NSPT, flex only

Shipping Weight 1.1 lb (0.48 kg)

Warning/Caution Notations

WARNING: Personal injury/loss of life

may occur if you do not follow

the procedures as specified.

CAUTION: Equipment damage, or loss of

data may occur if you do not

follow the procedures as

specified.

Required Tools

Phillips screwdrivers

No. 2 for screws, No. 1 for adjustment

Expected Installation Time

15 minutes

Prerequisites

CAUTION:

Remove power from in-service damper

actuator before installing external

auxiliary switch.

WARNING:

Do not open the external auxiliary switch.

EA1191R1

ASK75.3U

ASK75.1U

ASK75.3U

ASK75.1U

Figure 2. NEMA Type 3R Rating Only

With Use of Weather Shield.

Item Number 129-420, Rev. 010 Page 1 of 5

Document No. 129-420

Installation Instructions

December 13, 2004

Installation

New Actuators, Remove Pre-load

GCA, GBB, GIB GMA, GEB

EA1179R1

Figure 3. Determine Actuator Model and Orientation.

NOTE: For in-service actuators, skip Removing Pre-

load. For new actuators, remove the factory-

installed 5° pre-load.

Removing Preload

Before the External Auxiliary Switch can be installed on

a new, out-of-the-box actuator, you must remove the

factory-installed preload.

New Non-Spring Return Actuators

1. Insert shaft adapter at position A (See Figure 4).

2. Press the manual override button and move the

shaft adapter counterclockwise until actuator

reaches the internal stop (actuator will not move

past this point).

3. Remove the shaft adapter and manually reinstall it

against the external end stop at position B (See

Figure 4).

4. Proceed with EAS installation.

EA1190R1

PUSH

Figure 4.

Insert Shaft Adapter at Position A.

New Spring Return Actuators

1. Without the shaft adapter installed, using the hex

wrench, wind the manual override one full

revolution and release the wrench (See Figure 5).

The actuator will return to the 0° position and the

preload is now removed.

EA1192R1

1-Turn

Manual

Override

Figure 5.

2. Manually install the shaft adapter against the

external stop on the left end of the actuator. (See

position B in Figure 4.)

Removing Factory Pre-load from New SR Actuator.

Preparing the Actuator Shaft Adapter

1. Remove the position indicator from an in-service

actuator.

2. Determine the appropriate position adapter ring

(See Figure 1).

3. Align and snap the three open notches on the edge

of the EAS position adapter ring in place over the

three raised stubs on the actuator shaft adapter.

(See Figure 6).

EA1177R1

NOTE:

GCA/GBB/GIB

models use the

larger ring.

GMA/GEB models

use smaller ring.

See Figure 1.

Figure 6. Attaching the EAS Position Adapter Ring.

Page 2 of 5 Siemens Building Technologies, Inc.

Document No. 129-420

Installation Instructions

December 13, 2004

Short shaft applications

NOTE: The short shaft adapter is included in

the packing box with the shaft adapter.

With the short shaft adapter in place, align the

notch of the EAS over the protruding tab on the

position adapter ring and secure in place.

(See Figure 7).

ShortShaft

Adapter

EA1178R1

Figure 7. Attaching EAS to GCA/GIB/GBB Shaft Adapter.

Preparing the EAS for Mounting

2. On the back of the EAS, push the plastic inserts into

the mounting holes. (See Figure 8 and Figure 9).

3. Mount the position indicator on the face of the EAS

(See Figure 8 step 2 and Figure 9, step 2).

EA1182R1

Figure 8. For GMA/GEB Actuators, Use Top Screw Holes.

EA1181R1

Figure 9. For GCA, GBB, GIB Actuators, Use the Bottom

Screw Holes.

Mounting External Auxiliary Switch to

Actuator

1. Nest the alignment peg of the EAS position adapter

ring into the notch (See Figure 10).

The EAS lies flush against the face of the actuator.

EA1183R1

9.5±1.5lb-in(1.1Nm±0.2)

Note: GMA/GEB

actuators use top

screw holes, GCA,

GBB/GIB models

use bottom screw

holes.

Figure 10. Bringing the EAS and the Actuator together.

2. Secure the EAS in place with the M5×25 screws

provided. (See Figure 10).

CAUTION:

The EAS should not shift when it is

correctly installed firmly against the face

of the actuator.

The installation is complete.

Siemens Building Technologies, Inc. Page 3 of 5

Document No. 129-420

Installation Instructions

December 13, 2004

Manual Override

NOTE: When EAS is installed, you can still access the

manual override capability as shown in Figure

11.

0∞

GEB

GBB/GIB

GCA

GMA

EA1185R1

Figure 11. Manual Override.

Auxiliary Switches

CAUTION:

There should be no load on the actuator

when setting the auxiliary switches.

Setting the Switches

With the actuator in the full-closed (0°) position, press in

and turn with a Phillips screwdriver to the desired

setting. Release pressure to set the switch.

The switch is now set.

~3.5mm

max.10N

EA1186R1

45 55 6575

65 55 45 35

45 55 6575

65 55 45 35

Figure 12. Press In, Turn to Adjust, Release to Set Switch.

S1 S1 S4 S4

S2 S3 S2 S3 S5 S6 S5 S6

(Q12)

(Q14)

(Q12)

(Q22)

(Q24)

(Q22)

(Q24)

(Q11)

(Q21)

5∞

5∞85∞

2∞

20∞30∞70∞90∞

0∞10∞

EA1187R1

Figure 13. Example of Switches Set to 5° and 85°.

Wiring

WARNING:

Do not mix operations. Apply only line voltage

or only Class 2 voltages to the switching

outputs of both auxiliary switches A and B.

24Vac...250V/6(2)A

(Q12)

(Q14)

(Q24)

(Q22)

S2 S3 S5 S6

S1 S4

(Q11)

(Q21)



EA1189R1

Figure 14. Wiring Diagram.

Wiring Designation

Wire Code Color Switch - Function

S1 Gray/red A Input

S2 Gray/blue A – NC

S3 Gray/pink A – NO

S4 Black/red B Input

S5 Black/blue B – NC

S6 Black/pink B – NO

Page 4 of 5 Siemens Building Technologies, Inc.

Document No. 129-420

Installation Instructions

December 13, 2004

Dimensions

4.9

(124,5)

3.7

(94)

1.6

(39,8)

.65

(16,5)

3.6

(91)

(21,5)

.13

(3,5)

2.0

(51,2)

EA1180R1

1.2

(30,5)

Figure 15. External Auxiliary Switch Dimensions in Inches (mm).

Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as

design improvements are introduced. OpenAir is a trademark of Siemens Building Technologies, Inc. Other product or company names mentioned

Siemens Building Technologies, Inc.

1000 Deerfield Parkway

Buffalo Grove, IL 60089-4513

Your feedback is important to us. If you have comments

about this document, please send them to

[email protected]

U.S.A.

Document No. 129-420

Country of Origin: US

Page 5 of 5

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