Greenheck VCD-40 Maintenance Manual

®

Document 475289

Installation Instruction for

®

Extension Pin, Extension Pin Kit,

and Manual Quadrants for VCD-40

Installation, Operation and Maintenance Manual

Please read and save these instructions for future reference. Read carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety information. Failure
to comply with these instructions will result in voiding of the product warranty and may result in personal injury
and/or property damage.

For Dampers Installed in Ducts

Extended control shaft is installed from outside of
duct after damper is installed. Install as shown in this
document.

Extension Pin with Clip

Part Number 846031

Extension Pin with Clip

Number Qty Description Part Number

1 1 Extended Control Shaft 452509

2 1 Retaining Clip 451738

Tools Required

5

⁄16 in. Hex Nut Drive

3

⁄8 in. Electric Drill

1

⁄2 in. Open End Wrench

Before Installing Damper in the Duct

1. If the damper has more than one blade, determine which blade axle will be driven by the extended control shaft.
Always attach extended control shaft to a blade axle which is directly connected to the main linkage tiebar. DO
NOT attach extended control shaft to a crossover blade axle.

2. Cut hole approximately 1 in. (25mm) diameter in duct where the damper drive blade axle will be located. Hole
must provide clearance for enlarged portion of extended control shaft.

After Damper is Installed in the Duct

1. Push extended control shaft through the hole in the duct and onto the drive blade axle. Retainer clip should “click”
into groove on the drive blade axle and hold the shaft into place.
Standard control shaft location in the third blade from the bottom on dampers with three or more blades. Control
shaft location is the first blade from the bottom on dampers with one or two blades.

Kits for VCD-40 Series 1

Extension Pin Kit

®

Part Number 913908

1

⁄2 in. Extension Pin Kit

Number Qty Description Part Number

1 1 Standoff Bracket 913562

2 1 Extension Pin 452509

3 1 Retaining Clip 451738

4 41⁄4-20 Nut 415455

5 41⁄4-20 x 1⁄2 Stud 415609

NOTE: LOCATE BRACKET

AND DRILL (4) 0.256 DIA

HOLES FOR THREAD STUDS

5

1

2

3

4

CROSSOVER BLADE AXLE
DO NOT ATTACH CONTROL
SHAFT HERE!

NON FLANGED GALVANIZED

NOTE: LOCATE BRACKET

AND DRILL (4) 0.256 DIA

HOLES FOR THREAD STUDS

FLANGED GALVANIZED

Before Installing Damper in the Duct

1. If the damper has more than one blade, determine which blade axle will be driven by the extended control shaft.
Always attach extended control shaft to a blade axle which is directly connected to the main linkage tiebar. DO
NOT attach extended control shaft to a crossover blade axle.

2. Cut hole approximately 1 in. (25mm) diameter in duct where the damper drive blade axle will be located. Hole
must provide clearance for enlarged portion of the extended control shaft.

After Damper is Installed in the Duct

1. Push extended control shaft through the hole in the duct and onto the drive blade axle. Retainer clip should “click”
into the groove on the drive blade axle and hold the shaft into place. Standard control shaft location is the third
blade from the bottom on dampers with three or more blades. Control shaft location is the first blade from the
bottom on dampers with one or two blades.

2. Install the stand off bracket with bearing over the extended control shaft and screw bracket to the duct. Make sure
screws (provided by others) do not interfere with damper linkage or blade movement.

Kits for VCD-40 Series2