Siemens ASC77.2U - User Manual
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Table of Contents:
- Page 2 – Installation; Figure 3. Determine Actuator Model and Orientation.; load; Removing Preload; New Non-Spring Return Actuators; Insert Shaft Adapter at Position A.; New Spring Return Actuators; Removing Factory Pre-load from New SR Actuator.; Preparing the Actuator Shaft Adapter; Figure 6. Attaching the EAS Position Adapter Ring.
- Page 3 – Short shaft applications; Preparing the EAS for Mounting; Figure 10. Bringing the EAS and the Actuator together.
- Page 4 – Manual Override; Auxiliary Switches; Setting the Switches; Figure 13. Example of Switches Set to 5° and 85°.; Wiring; Wiring Designation; Wire Code
- Page 5 – Installation Instructions; Dimensions
Installation Instructions
Document No. 129-420
December 13, 2004
OpenAir™ External Auxiliary Switch
a
b
c
d
e
f
g
EA1
175R1
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.
EA1
191R1
ASK75.3U
or
ASK75.1U
ASK75.3U
or
ASK75.1U
Figure 2. NEMA Type 3R Rating Only
With Use of Weather Shield.
Item Number 129-420, Rev. 010
Page 1 of 5
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Summary
Document No. 129-420 Installation Instructions December 13, 2004 Installation New Actuators, Remove Pre-load GCA, GBB, GIB GMA, GEB EA1 179R1 Figure 3. Determine Actuator Model and Orientation. NOTE: For in-service actuators, skip Removing Pre- load . For new actuators, remove the factory- installed...
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 se...
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 ∞ 0 ∞ GEB GBB/GIB GCA GMA EA1 185R1 Figure 11. Manual Override. Auxiliary Switches CAUTION: There should be no lo...
