4. Install the Finished Ceiling
Build a 5
″
(127 mm) typical drop sill (including finished ceiling material) around the mounting
cradle using cut/modified 2x6 lumber.
Install the water-resistant wall board.
IMPORTANT!
The ceiling cutout must be within the dimension limits specified above. The seal will not
cover gaps greater than 1/4
″
(6 mm).
IMPORTANT!
The balancing loop(s) must be centered within 1/8
″
(3 mm) with the pipe nipples evenly
spaced from the edges of the rough opening.
Cut out a 20-3/8
″
(518 mm) square at the installation location. The square must be within 1/8
″
(3
mm) of the specified cut-out dimension to ensure the rough cut edges will be covered by the light
panel frame after installation.
Install the finished ceiling material (if using tile).
Verify that the finished drop sill is between 3-1/2
″
(89 mm) and 3-3/4
″
(95 mm) from the bottom of
the cradle.
5" (127 mm) Typical
4-7/8" (124 mm) Min
Finished
Ceiling
3-5/8" (92 mm) Typical
3-1/2" (89 mm) Min
2x4
Ceiling Joist
2x6
Cut/Modified
Ceiling
Joist
2x4
Finished Ceiling
Cutout
Nipple
Pressure
Balancing
Loop
Cutout
20-3/8" +/- 1/8"
(518 mm +/- 3 mm)
20-3/8"
+/- 1/8"
(518 mm
+/- 3 mm)
Kohler Co.
7
1235394-2-A