Greenheck 331-2976 Installation, Operation And Maintenance

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.
Tools Required:
Wrenches:
(1) ⁄ in., (2) ⁄ in., (1)
3 1
8 2
and (1)
Item No. Qty
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 1
⁄ in.,
7
16
⁄ in.
3
4
Description
Standoff Bracket
Side Bracket w/o Bearing
Lower Support Bracket
Upper Cross Support Bracket
Side Bracket w/ bearing
⁄ in. Rod
1
2
Actuator Siemens Cat 10
Crankarm
Document Number 483437
UL Listed Pneumatic Actuator with Spring Return
Item No.
9
10
11
12
13
14
15
16
Siemens #4 Actuator
Model 331-2976 & 332-2976
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.
Qty. Description
8
⁄ in.- 20 x ⁄ in. Bolt
1 1
4 2
2
⁄ in. Dia. Hose Clamp
1
2
10 / in.-20 Spinlock Nut
1
4
1 ⁄ in.- 20 x ⁄ in. Press Stud
1 1
4 2
9 / in.-20 x ⁄ in. Spinlock Bolt
1
1
4
2
1 External Plate
1 Crankarm Assembly
1 1" Dia. Bearing