Deep Wall Installation - Friedrich PTAC Series Installation & Operation Manual

920-087-04 (8-05)
Section II - Deep Wall Installation (PXWE)
If the wall is thicker than allowed in the notes in Figure 6, a sheet
metal wall sleeve extension and flashing 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 baffles must be mounted to properly direct air flow to
and from the condenser.
3. Thewall 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 infiltrate into the building.
5. Fabricate and install metal flashing in wall to serve as a drip
panel. Refer to drawing for more information.
6. Condensate notches and overflow slots must be kept clear
of sealant and gaskets so condensate can flow freely into
the wall sleeve extension.
NOTE: Improper fabrication or installation of a wall sleeve
extension will impair PTAC performance.
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
makescontact with thewall sleeve (see Figure8). 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.
Figure8
Wall SleeveExtensionSealant Locations _ION__ s
IMPORTANT NOTE: The silicone bead MUST extend 3" J w=. _l ..... _.
_') up the side of the two flanges to prevent condensate / _X'e'n"si'on _ "_,
from leaking. _!' r_ear _an_ r,_n/._
I Wall Sleeve _.llf,[/'_) •
Wall Sleeve I _._ _lll_i='_" l
Silicone Bead 7-_
Wall Sleeve
Extension
Outside Edge Sealant
Insulation
I Drip Panel L
Sealant around perimeter
Drip
Width of Wall Edge Notches (4)
Wall Sleeve Extension, 42" X 16" Frame, 20 gauge minimum, painted or aluminium
i Sealant inside (4)
bottom corners