MODEL 636 / 636AL ROOF CAP
INSTALLATION INSTRUCTIONS
For 3" or 4" Round Duct

Plan installation carefully. Before installing roof cap,
make sure that birdscreen is in place. Refer to "MAIN-
TENANCE" section. Roof cap will accept 3" or 4" round
duct. Tape all joints with duct tape to prevent air and
water leaks. NOTE: DO NOT INSTALL THE ROOF
CAP ON A FLAT ROOF.

        ¾"

           MAX.

1. Cut hole in roof approximately ½" larger than duct-
   work.

2. Insert ductwork through opening and run it back to
   fan. Leave a maximum of ¾" of duct projecting above
   roof surface on the high side.

                             ¾"

                                          MAX.

3. Trim ductwork parallel to roof pitch.

4. Lay roof cap over ductwork and trace outline of roof
   flange onto shingles.

2"       1¾"

    1¾"

5. Trim shingles as shown, so they will fit snugly around
   hood of roof cap when installed. Seal all around duct
   with roof cement.


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      ROOF CEMENT              NAILS

(Seal shingles to roof cap (Seal all nail heads

      on sides and top)  with roof cement)

6. Carefully lift shingles and slide back flange of roof
   cap under shingles. Nail flange to roof under shingles
   at top and two sides. Nail directly to roof at bottom.

7. Use roof cement to seal shingles to top and sides
   of roof cap. Seal all nail heads with roof cement as
   well.

MAINTENANCE

To replace damper flap or gasket material:

1. Remove birdscreen, using sharp pointed tool. Pull
   screen down and pop it out.

2. Remove screw (Item #7) in center of damper plate
   assembly and pull assembly out.

3. Pull out damper rod and lift damper flap out.

4. Replace defective or worn parts and reinstall damper
   flap with rib in flap facing up.

5. Slide damper plate assembly into grooves on inside
   of cap and replace screw. Make sure that damper
   opens freely.

6. Replace screen and position as shown.

NOTE: The high quality paint coating on our outdoor
accessories may be used as the exterior finish or as
a prime coat for the finish of your choice. Apply the
coating best suited for the special conditions of your
application.

 KEY  PART NO.           DESCRIPTION
   1  97006558           Housing for 636 (Black)
      97011262           Housing for 636AL (Aluminum)
      98005783           Bird Screen
   2  98008277           Damper Plate
   3  98005784           Damper Flap
   4  99500326           Sealant Strip
   5  98005785           Damper Rod
   6  99150576           Screw
   7

Broan-NuTone LLC Hartford, WI         99041929D
www.broan.com 1-800-558-1711


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