Ceiling Cassette Installation Manual

DURASTAR.COM
15
STEP 3: DRILL WALL HOLE FOR CONNECTIVE PIPING
1. Determine the location of the wall hole based on the location of the outdoor unit.
2. Using a 2 1/2" (65mm) core drill for units with a gas side connective pipe less than 5/8" (16mm), or
3 1/2" (90mm) for units with a gas side pipe greater than or equal to 5/8" (16mm), drill a hole in the
wall. Make sure that the hole is drilled at a slight downward angle, so that the outdoor end of the
hole is lower than the indoor end by about 3/16 - 1/4" (5mm to 7mm). This will ensure proper water
drainage.
3. Place the protective wall hole sleeve (field supplied) into the hole. This protects pipes and cables
from sharp edges and will help seal the opening when you finish the installation process. After the
sleeve is inserted through the wall, connect the wall hole sleeve cover to the wall sleeve on the
outside end. Make sure the cover is flush with the outside wall.
Wall
Indoor Outdoor
3/16-1/4”
(5-7 mm)
Ceiling
Ceiling board
Main body
or 15/16” (24mm)
3/8-3/4” (10 - 19mm)
WARNING
Ensure that the indoor unit is completely level. Improper installation can cause the drain
pipe to back up into the unit and water leaks.
5. Mount the indoor unit. Using two people to lift and secure it, insert the suspension bolts into the
unit's hanging bracket holes and secure in place with washers and nuts. Make sure the unit is
level and the bottom of the unit is higher than the ceiling board to accommodate the unit's panel
(15/16" for DRAC09F1A, DRAC12F1A, and DRAC18F1A models or 3/8-3/4" for DRAC24F1A).