4
ONE: PREPARATION
PREPARATION
1
3. Using your #2 Robertson bit, remove
the four screws that secure the cover
lid to the box housing (A). Carefully
remove the lid and store in a safe place
until the final stage of the installation.
1. Remove the protective plastic on the
exterior of the box housing (A).
2. Ensure the entire mounting surface is
completely flat. You will need the depth
of one guide rail (C) on each side of
the opening, and the depth of the box
housing (A) at the top of the opening.
If necessary, remove the trim around
the opening so the mounting surface is
completely flat.
