Attach butterfly damper wheels on outside of grill using two ¼ - 20 x
5 tighten the flange nut, this will allow for smooth rotation of the damper.
1/4” Flange nuts | 1/4- 20 x 3/4” screws | |
(2 pieces) | ||
(2 pieces) | ||
|
Butterfly damper wheel (2 pieces)
6 Attach the lower hinges to back panel by using four ¼ - 20 x 1 1/2" screws
Lower hinge
(2 pieces)
1/4 - 20 x 1 1/2” screws (4 pieces)
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