Greenheck MBD-10 standoff and manual quadrant kit (476321) - Manual

Document Number 476321
MBD-10 Manual Balancing Dampers
1 1/2 in. or 2 in. Standoff Brackets and Manual Quadrants
Installation instructions without standoff bracket
5
6
7
3
4
2
1
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)
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 1/8 inch (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.
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