Our commitment – Greenheck MBD-10 standoff and manual quadrant kit (476321) User Manual

Page 2

Installation Instructions with standoff bracket

Quadrant

Pointer

Item

Qty

Description

Part Number

Manual Quadrant

475679

Bolt

415034

Flat washer

416206

Hex nut

415455

Wing nut

415885

Axle pin

452899

Axle clip

451890

Tek screw

415555

1 1/2 in. Standoff bracket

742523

2 in. Standoff bracket

742525

1. Install the damper in the duct. Place fasteners so

that they do not interfere with operation of the
blades. The end of the blade that has the lances
will accept the quadrant drive pin. Place that side
of the damper on the side of the duct where the
quadrant is to be located.

2. Cut a hole thru the duct over the lanced blade axle

bearing. The hole should be large enough for the
axle pin to slide through (approximately 9/16 in.
diameter).

3. Insert the bolt into the standoff bracket as shown

and secure using the hex nut.

4. Using the outer arc of the quadrant, attach the

quadrant to the standoff bolt and apply the flat
washer and wing nut. Slide the standoff assembly
to the end of the arc that is furthest from the
quadrant pointer and tighten the wing nut. Slide the
axle pin through the quadrant.

5. Align the quadrant pointer with the blade as shown

and then insert the axle pin into the damper blade
lances. Pound the axle pin into the damper blade
until the axle clip is approximately 2¼ in. (57mm)
away from the duct.

6. Rotate the quadrant and blade until the blades

are at the full closed position. (The quadrant
pointer will be approximately perpendicular to the
centerline of the duct).

7. Repositioned the standoff bracket as shown, then,

attach the standoff bracket to the duct using two
self- drilling TEK screws.

8. Using the quadrant lever, cycle the damper while

checking for proper operation. Verify that the
blade is free floating within the frame. Resolve any
interference issues that prevent smooth operation.

9. Set the damper blade to the desired position and

tighten the wing nut.

476321• MBD-10 Rev. 1, May 2013

As a result of our commitment to continuous improvement, Greenheck reserves the right to change
specifications without notice.
Specific Greenheck product warranties are located on greenheck.com within the product area tabs and in
the Library under Warranties.

Phone: (715) 359-6171 • Fax: (715) 355-2399 • E-mail: [email protected] • Website: www.greenheck.com

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