IM 882 / Page 7 of 36
Wall Opening Requirements
When roughing in the opening for the wall sleeve, make
certain there is sufficient clearance from the walls and
floor. The wall sleeve should be positioned a minimum of
5/8" in from the room side finished wall to accommodate
the room cabinet. A minimum distance of 3" above the
finished floor is required for return air.
The rough opening should measure 16¼" high x 42¼"
wide. Before installing the unit, check the wall opening
to be sure the wall sleeve will slide into the opening
unobstructed. For masonry walls, a lintel must be used to
provide support over each opening.
When using a louver frame, the opening must measure
16
5
/
8
" x 42
5
/
8
". Louver frames should be used for
panel wall and thin wall applications to assure positive
anchoring to the wall (Figure 4).
The opening must start 4" above the finished floor
(including carpeting) to provide proper return air.
Louver Frame Installation
When a louver frame is used, it must be installed prior
to, or at the same time, as the wall sleeve, and it must be
level and square.
1. Apply caulking compound on the surfaces of the lou-
ver frame’s four flanges which will come in contact
with the wall. Add caulking as required for weather
tight seal.
2. Insert the sleeve of the louver frame into the wall
opening from the exterior of the building and apply
firm pressure so that the caulked frame flanges are
snug against the exterior of the building. Secure the
louver frame to the wall if desired.
3. Secure the louver frame to the wall through the sides
and top. Never secure the frame through the bottom
as it may cause leaks.
If the louver frame is to be installed in a panel wall, it
should be installed at the same time as the wall sleeve.
WARNING
Residential and institutional cleaning compounds can cause
permanent damage to the packaged terminal unit. To avoid
damage to unit controls and heat transfer surfaces, do not
spray cleaning compounds onto the discharge grille, return
air opening, or unit controls. Normal cleaning can be accom
-
plished by wiping the unit surface with a damp cloth. When
using cleaning compounds on carpets, floors or walls, turn
the unit off to avoid drawing potentially damaging vapors into
the package terminal unit.
Wall Sleeve Extension Installation
Wall sleeve extensions are shipped in a separate carton
and tagged to match the proper unit. Be sure to check
tagging of the extension against that of the unit. Install
the wall sleeve extension as follows:
1. Position the extension with standard wall sleeve
so proper alignment with drain and mounting holes is
achieved.
2. Place a bead of caulk around the perimeter of the
wall sleeve and another bead around the mating
side of the wall sleeve extension so that the joint
is watertight. Do not permit caulking to block the
weep holes. Be sure to use a resilient caulking such
as silicone.
3. Assemble the wall sleeve extension to the wall
sleeve. Clean out weep holes to assure proper
drainage.
4. Continue wall sleeve installation according to
instructions on page 8.
Figure 5. Wall Sleeve Extension
Wall Sleeve Extension
6
7
/
8
"
11
1
/
8
"
2"
Room Side
Air Splitters
As Required
2"
16
"
2"
2
3
/
16
"
16
3
/
16
"
3
3
/
"
3
/
16
"
18
3
/
16
"
Figure 4. Louver Frame Dimensions
Note:
Wall Sleeve rough opening when using a Louver Frame must
be 16
5
/
8
" x 42
5
/
8
"
DO NOT drill holes in the bottom of the wall sleeve as it will
cause leaks.
CAUTION
