Greenheck 331-2976 Instrucciones de instalación y funcionamiento

Item No. Qty. Description

981⁄4in.- 20 x 1⁄2in. Bolt

10 21⁄2in. Dia. Hose Clamp

11 10 1/4 in.-20 Spinlock Nut

12 1 1⁄4in.- 20 x 1⁄2in. Press Stud

13 9 1/4 in.-20 x 1⁄2in. Spinlock Bolt

14 1 External Plate

15 1 Crankarm Assembly

16 1 1" Dia. Bearing

Tools Required:

Wrenches:

(1) 3⁄8in., (2) 1⁄2in., (1) 7⁄16 in.,

and (1) 3⁄4in.

Item No. Qty Description

1 1 Standoff Bracket

2 1 Side Bracket w/o Bearing

3 1 Lower Support Bracket

4 1 Upper Cross Support Bracket

5 1 Side Bracket w/ bearing

6 1 1⁄2in. Rod

7 1 Actuator Siemens Cat 10

8 1 Crankarm

Document Number 483437

Siemens #4 Actuator

Model 331-2976 & 332-2976

UL Listed Pneumatic Actuator with Spring Return

Installation, Operation and Maintenance Manual

Note: For dampers installed in ducts or sleeves.

This Siemens actuator is a pneumatic actuator with a 11 square inch effective diaphragm area and a 4 inch stroke.

It extends to its holding position when air pressure is applied and spring returns to its fail position when the air

supply is interrupted. This model has a maximum air pressure of 25 psi.

Kit No. Actuator

914987 Pneumatic Actuator 331-2976

914988 Pneumatic Actuator 332-2976

Note the damper shaft rotation for fail direction

and orient the linkage appropriately. Position

the crankarm in one of the positions shown.

Attach the crankarm to the clevis on the

actuator with the clevis pin and the hitch pin

supplied through hole "A" shown.

Instructions:

1. Run the supply pressure to the actuator and regulate it to a maximum of 25 psi.

2. Apply air pressure to the actuator. The damper blades should fully open or close and return to the fail position when

power is disconnected; if they do not, adjustments can be made by resetting the crankarm position on the damper or

actuator shaft or by changing the distance from the actuator face to the center of the hole in the clevis.

Copyright © 2018 Greenheck Fan Corporation

483437 Siemens #4 Rev. 1 August 2018

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