12
920-087-06
If the wall is thicker than allowed in the notes in Figure 6, a sheet
metal wall sleeve extension or custom deep wall sleeve and
fl
ashing MUST be used.
Installation Instructions for the PXWE
4" Wall Sleeve Extension
The following points MUST be considered when installing a wall
sleeve extension:
1 Provision must be made to direct excess condensate from
the back of the wall sleeve into the extension then outside
the building or to a drainage system.
2. Air baf
fl
es must be mounted to properly direct air
fl
ow to
and from the condenser.
3. The wall sleeve extension design must allow for the proper
mounting of the grille.
4. Caulking is required at all sites where condensate or
external water could potentially in
fi
ltrate into the building.
5. Fabricate and install metal
fl
ashing in wall to serve as a drip
panel. Refer to drawing for more information.
6. Condensate notches and over
fl
ow slots must be kept clear
of sealant and gaskets so condensate can
fl
ow freely into
the wall sleeve extension.
Extension Installation
Secure the wall sleeve extension to the wall sleeve before
installing it in the wall. Refer to Figure 8 for a guide for fabrication
of a condensate drip panel. The panel MUST extend the full depth
of the wall sleeve and the wall sleeve extension.
Pay particular care in sealing and caulking the panel where it
makes contact with the wall sleeve (see Figure 8). After installation
in the wall, secure with fasteners through the sides. Use a good
grade of silicone sealant around the sleeve extension. Seal all
exposed screw heads. When the installation is complete, the
outside grille should be attached to the wall sleeve extension.
Deep Wall Installation (PXWE)
Figure 8
IMPORTANT NOTE: The silicone bead MUST extend 3"
up the side of the two
fl
anges to prevent condensate
from leaking.
Wall Sleeve Extension, 42" X 16" Frame, 20 gauge minimum, painted or aluminium
Outside Edge
Insulation
Wall Sleeve
Air Baffl es
Condensate
Notches (4)
Condensate
Drip Panel
(Field
Supplied)
Sealant inside (4) bottom corners
Drip
Edge
Width of Wall
Wall Sleeve Extension Sealant Locations
NOTICE
Potential property damage can occur if instructions are
not followed. In Addition, improper
fi
eld fabrication or
improper installation of wall sleeve extension will impair
PTAC performance.
