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Technical Instructions POWERS™ Controls No. 3 Pneumatic Damper Actuator
Document Number 155-146P25
September 18, 2008
Page 6 Siemens Building Technologies, Inc.
Installation,
Continued
Extended Shaft
Mounting, Fixed
Actuator
For Actuators 331-4314, 331-4514, 331-4814 order Linkage Kit 331-958.
For Actuators 331-4313, 331-4513, 331-4813, order Clevis 333-207 and Linkage Kit
331-958.
1. Determine the direction of the damper shaft rotation (clockwise or
coun
terclockwise) on an increase in pressure to the actuator.
2. Determine the angle of rotation required for the damper to move from closed to full
open.
NOTE: Since the actuator stroke is 2-3/8 inch (6 cm) and the angle of rotation is
known, the crank radius can be determined from the graph in TB181
Maximum Thrust Ratings of Pneumatic Damper Actuators Technical Bulletin
(155-219P25) or use Table 4.
3. Attach the link to the crank at the radius value determi
ned in Step 2.
4. Attach the clevis and other end of the linkage
to the actuator shaft (Figure 3).
5. The normal position of the damper (open or closed) and its direction of rotation
(CW or CCW) will dete
rmine the location of the actuator and linkage assembly
(Table 3).
6. Attach an air line or Baumanometer (squeeze bulb)
to the actuator and increase
pressure until the actuator shaft moves one half of its stroke, 1-3/16 inch (3 cm).
Select the correct location for the actuator assembly as determined in Step 5.
7. Slip the crank over the damper shaft and position the a
ssembly so that the actuator
shaft and link are straight and perpendicular to the crank.
8. Mark and attach the actuator bracket to the duct at this location. If this in
stallation
procedure is followed, there will be no problem with linkage scissoring or locking
up.
The installation is complete.
Item Description Item Description
1 Clevis Pin 4 Crank with Set Screw
2 Spring Washer 5 Hitch Pin
3 Washer, Nylon 6 Link, 4 inches (102 mm) long
Figure 3. Fixed Mounted Actuator Assembly with Linkage Kit 331-958.
- Technical Instructions 1
- Product Numbers 2
- Warning/Caution Notations 2
- Service 2
- (NEUTRAL) 5
- (SUPPLY) 5
- Wiring, Continued 6
- Smoke Control Dampers 8
- BLACK (G0) 10
- GREEN (GND) 10
- BLUE (N) 11
- BROWN (L) 11
- POWERS™ Controls 12
- Specifications 13
- Continued 14
- Accessories 14
- Installation 15
- Installation, Continued 16
- Dimensions 18
- Dimensions, Continued 19
- Controls 20
- Document Number 155-032P25 24
- October 10, 2005 24
- Operation 25
- Hesitation Actuator 26
- Adjustment 26
- Extended Shaft 26
- Mounting - Pivot 26
- Actuator 26
- Mounting - Fixed 29
- Frame Mounting 30
- Offset Mounting 30
- Bracket 30
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