Greenheck MBD-10M standoff and manual quadrant kit (476816) - Manual (Page 2)

Installation Instructions with standoff bracket
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 1 1/2 in. Standoff bracket 742523
1 2 in. Standoff bracket 742525
1. Note that one of the blade axle pins is longer. The
quadrant will be applied to that pin. Install the
damper in the duct so that the longer pin will be
positioned against the side of the duct where the
quadrant is to be located. Place fasteners so that
they do not interfere with operation of the blades.
2. Cut a hole through the duct, over the square axle
bearing that contains the longer pin. The hole
should be made large enough for the axle pin to
slide through (approximately 9/16 in. diameter).
3. Slide out the axle pin approximately 2 ¼ in. (57mm)
beyond the duct while retaining the bushing inside
the frame boss. Remove the axle clip from the
outer groove of the pin and place it on the inner
groove. Pound the axle pin back into the blade until
the axle clip presses the bushing against the blade.
4. Insert the bolt into the standoff bracket as shown
and secure with the hex nut.
5. Using the outer arc of the quadrant, place the
quadrant onto the bolt and apply the flat washer
and wing nut. Slide the standoff to the end of the
arc that is furthest from the quadrant pointer and
secure the wing nut.
6. Align the quadrant pointer with the blade as shown
and then slide the quadrant onto the blade axle
pin.
7. Rotate the quadrant and blade until the blade(s)
are at the full closed position. (The quadrant
pointer will be approximately perpendicular to the
centerline of the duct). Attach the standoff bracket
to the duct as shown, using two self- drilling
screws.
8. Install another axle clip into the outer groove on
the axle pin to keep the quadrant from slipping off
of the pin.
9. Using the quadrant lever, cycle the damper,
checking for proper operation. Verify that the
blade is free floating within the frame. Resolve any
interference issues that may prevent operation.
10. Set the damper blade to the desired position and
tighten the wing nut.
1
3
5
9
8 4
2
6
7
Quadrant
pointer
476816• MBD-10M Rev. 1, May 2013 Copyright 2013 © Greenheck Fan Corporation
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specifications without notice.
Specific Greenheck product warranties are located on greenheck.com within the product area tabs and in
the Library under Warranties.
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