Greenheck MBD-10 User manual

®
MBD-10 1
Document 476321
MBD-10
1½ in. or 2 in. Standoff Brackets,
Manual Quadrant, and Cable Operator
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.
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Quadrant
Pointer
Item Qty Description Part Number
1 1 Manual Quadrant 475679
2 1 Bolt 415034
3 1 Flat washer 416206
4 1 Hex nut 415455
5 1 Wing nut 415885
6 1 Axle pin 454136
7 1 Axle clip 451890
Tools Required:
Hammer
5⁄16 in. driver
Electric drill
9⁄16 in. drill bit
7⁄16 in. wrenches (2)
Installation Instructions Without Standoff Bracket
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 through 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. Slide the axle pin through the quadrant. Align the quadrant pointer with the blade as shown and then insert the
pin into the damper blade lances.
4. Pound the axle pin into the damper blade until the quadrant is approximately ¾ in. (19mm) away from the duct.
5. 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).
6. While holding the quadrant and blade in the closed position and using the end of the outer quadrant arc as a
guide, drill a ¼ in. (6mm) diameter hole through the duct. Drill the hole at the end of the arc that is furthest from
the quadrant pointer.
7. Rotate the quadrant out of the way and insert the bolt from the inside of the duct. Secure the bolt to the duct
using the hex nut.
8. Rotate the quadrant and blade back and position the quadrant over the bolt. Apply the flat washer and wing nut
onto the bolt.
9. Pound the axle pin into the blade until the axle clip is within 1⁄8in. (3mm) of the quadrant.
10. 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.
11. Set the damper blade to the desired position and tighten the wing nut.

MBD-102
Installation Instructions With Standoff Bracket
Quadrant
Pointer
Item Qty Description Part Number
1 1 Manual Quadrant 475679
2 1 Bolt 415034
3 1 Flat washer 416206
4 1 Hex nut 415455
5 1 Wing nut 415885
6 1 Axle pin 452899
7 1 Axle clip 451890
8 2 Tek screw 415555
9 1 11⁄2in. Standoff bracket 742523
1 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.

MBD-10 3
Item Qty Description Part Number
1 1 Cable Operator 1036540
2 1 Axle pin 1036728
3 2 Tek screw 415555
Tools Required:
Hammer
5⁄16 in. driver
Electric drill
9⁄16 in. drill bit
1⁄4in. bit driver
1⁄8in. hex key
5⁄64 in. hex key
Installation Instructions For Cable Operator and Round Ceiling Cup
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 cable operator drive pin. Place that side of the damper on the side
of the duct where the cable operator is to be located.
2. Cut a hole through 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. Set damper blade to full open. Slide the axle pin through the cable operator. Orientate lever on axle pin to 45
degrees, as shown. Insert the pin into the damper blade lances.
4. Pound the axle pin into the damper blade until the cable operator is firmly secured between the duct and the lever
on the axle pin.
5. Orientate cable operator such that it is running parallel to the duct. Install (2) Tek screws through screw holes in
the cable operator, through ductwork, and into damper frame as shown.
6. Insert the end of the cable into the coupling on the cable operator. Tighten the set screw.
7. Use 1⁄4in. bit driver to rotate cable until set screws on cable operator gear are orientated such that they drive
perpendicular into adjacent faces of the square axle pin. Tighten set screws.
8. Run the cable to termination point and secure the cable at 3 ft. intervals and every change in direction. Cables
should be taut or nearly taut with a 4 in. minimum turn radius. For cable runs longer than 20 ft., use of conduit is
recommended on straight run sections.
9. Attach the mounting bracket to the structural member
such that the bottom of the bracket is flush with the top
of the ceiling. (Illustration A)
10. Drill a 1⁄2in. diameter hole in the ceiling location that
lines up with the centerline of the cable.
11. Use a 1⁄4in. bit driver to balance your damper.
12. Select the appropriate nylon cap to cover the opening,
depending on the ceiling thickness. (Illustration A)
Attach to exposed cable.
Illustration A

476321 • MBD-10, Rev. 5, October 2022 Copyright 2022 © Greenheck Fan Corporation4
As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications
without notice.
Product warranties can be found online at Greenheck.com, either on the specific product page or in the
literature section of the website at Greenheck.com/Resources/Library/Literature.
®
Phone: [phone] • Fax: [phone] • Parts : 800.355.5354 • E-mail: [email protected] • Website: www.greenheck.com
Our Commitment
Item Qty Description Part Number
1 1 Cable Operator 1036540
2 1 Axle pin 1036728
3 2 Tek screw 415555
Tools Required:
Hammer
5⁄16 in. driver
Electric drill
9⁄16 in. drill bit
1⁄4in. bit driver
1⁄8in. hex key
5⁄64 in. hex key
Installation Instructions For Cable Operator with Square Wall/Ceiling Plate
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 cable operator drive pin. Place that side of the damper on the side
of the duct where the cable operator is to be located.
2. Cut a hole through 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. Set damper blade to full open. Slide the axle pin through the cable operator. Orientate lever on axle pin to 45
degrees, as shown. Insert the pin into the damper blade lances.
4. Pound the axle pin into the damper blade until the cable operator is firmly secured between the duct and the lever
on the axle pin.
5. Orientate cable operator such that it is running parallel to the duct. Install (2) Tek screws through screw holes in
the cable operator, through ductwork, and into damper frame as shown.
6. Insert the end of the cable into the coupling on the cable operator. Tighten the set screw.
7. Use 1⁄4in bit driver to rotate cable until set screws on cable operator gear are orientated such that they drive
perpendicular into adjacent faces of the square axle pin. Tighten set screws.
8. Run the cable to termination point and secure the cable at 3 foot intervals and every change in direction. Cables
should be taut or nearly taut with a 4 in. minimum turn radius. For cable runs longer than 20 feet, use of conduit is
recommended on straight run sections.
9. Fasten ceiling/wall plate to framing at the termination point, aligning
the depth so that the box is properly aligned with the finished surface.
(Illustration B)
10. For ceiling mount applications, use a 1⁄4in. bit driver to balance your
damper.
11. For wall mount applications, move guide and bushing to top knockout.
Pull the cable out towards you to allow driver access, then balance
damper. Push the cable back in place once balancing is complete.
12. Install cover plate. Illustration B