Manual De Usuario Siemens Electrónica Del Automóvil Ap 331-3 [5/12 Páginas]

Siemens Electrónica del automóvil AP 331-3

POWERS™ Controls No. 6 Pneumatic Damper Actuator Technical Instructions

Document No. 155-029P25

December 3, 2004

Operation

Standard Actuator

(Figure 1)

The air tubing from a controlling instrument is connected to the actuator’s upper housing.

With no control pressure to the actuator, the compression spring forces the spring seat

and actuator shaft toward the upper housing, but is limited by the E-ring. As the control

pressure increases, the spring compression is overcome and the actuator shaft

gradually moves outward. Conversely, as control pressure decreases, the spring returns

the shaft to the position at which the air pressure on the diaphragm balances the spring

tension. For each value of control pressure there is a corresponding position of the shaft.

Table 3. Standard Actuator Components.

Item Part No. Description Qty. Material

1 047-061J Retaining E-ring 1 Steel

2 333-217 1 × 1-1/4 in. Hex Nut 1 Brass

3 — Spring Retainer 1 —

4 — Stem Guide Assembly 1 —

5 — Lower Housing 1 Aluminum

6 333-572

(pkg. of 5)

Diaphragm 1 Silicone

rubber

7 599-00413 5/16 in.-18 × 1

Large Hex Cap Screw

6 Steel

8 — Upper Housing 1 Aluminum

9 — Helical Compression Spring 1

331-091 3 to 13 psi (21 to 90 kPa) —

331-208 3 to 8 psi (21 to 55 kPa) —

331-094 8 to 13 psi (55 to 90 kPa) —

10 — Piston Plate and Stem

Assembly

1 Aluminum/

11 — Retaining C-ring 1 Steel

Figure 1. Standard Actuator.

12 333-197 Stop Kit (Optional) — Steel

Extended Shaft

Mounting—Pivot

Actuator

1. Order one of the following and see Table 4 for parts lists:

Actuator: 331-3011, 331,-3012, 331-3013, or 332-3011

2. Slip the 3/4-inch (19-mm) diameter hole in the mounting plate over the damper

shaft.

3. Slip the crank over the damper shaft. With the actuator assembly to the left of the

damper shaft, an increase in actuator pressure rotates the damper blade CW

when the crank is above the damper shaft, or CCW when the crank is below the

damper shaft. See Figure 2.

With the actuator assembly to the right of the damper shaft, an increase in

actuator pressure rotates the damper blade CCW when the crank is above the

damper shaft or CW when the crank is below the damper shaft.

4. Position the mounting plate and attach it to the duct with four screws.

5. When the actuator cannot be directly mounted, drive the extended damper shaft

using the Remote Mounting Kit 331-618 and Actuator 331-2856. See Figure 3.

Siemens Building Technologies, Inc. Page 5

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