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

Document Number 476816
MBD-10M Manual Balancing Dampers
1 1/2 in. or 2 in. Standoff Brackets and Manual Quadrants
Installation instructions without standoff bracket
6
5
3
2
4
1
7
8
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 Washer 415482
7 1 Axle pin 454136
8 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. If the damper has one blade, either end of
the blade will accept the quadrant. If the damper
has two blades w/linkage, place the linkage side of
the damper against the side of the duct where the
quadrant is to be located.
2. Cut a hole through the duct, over the blade axle
bearing where the quadrant will be installed. 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 ¾ in. (19mm)
beyond the duct while retaining the bushing inside
the frame boss. Remove the axle clip.
4. Place the spacer onto the axle pin. Align the
quadrant pointer with the blade as shown and then
slide the quadrant onto the blade axle pin.
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. Install the flat washer
and wing nut onto the bolt.
9. Install the axle clip into the axle pin groove. Pound
the axle pin into the blade until the axle ring is
within 1/8 in. (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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