Siemens EA 746 Series Especificaciones descargar pdf (Pagina 26)

POWERS™ Controls No. 4 Pneumatic Damper Actuator Technical Instructions

Document Number 155-032P25

October 10, 2005

Siemens Building Technologies, Inc. Page 7

Hesitation Actuator

Adjustment

Example:

To obtain an initial hesitation point after one inch (25 mm) of shaft travel.

1. Add air pressure to the actuator until shaft travel is one inch (25 mm).

2. Turn locknuts on cycle adjustment rods until they contact lower housing, then lock

together (Figure 4, Items 10 and 11). For initial hesitation point settings other than

one inch (25 mm), follow this same procedure.

CAUTION:

Make certain cycle adjustment nuts are even to ensure smooth operation.

Extended Shaft

Mounting - Pivot

Actuator

1. Order one of the following for extended shaft mounting. These assemblies are

designed for 90° damper rotation.

Actuator: 331-3000, 331-3001, 331-3002, 331-2973, or 331-3004

NOTE:

Clevis mounts in Crank Radius Hole No. 1 for 90° damper rotation.

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

(Figure 5).

Table 4. Mounting Plate Hole Identification.

Hole Used For

1 No. 6 Actuator extended shaft mounting

2 Not used

No. 4 Actuator extended shaft 3

No. 6 Actuator frame mounting NC

4 No. 6 Actuator frame mounting NO

5 No. 4 Actuator frame mounting NC

6 No. 4 Actuator frame mounting NO

Figure 5. Actuator Mounting Plate 331-623.

Dimensions in Inches (Millimeters).

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 32 33

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