Friedrich HEAT PUMPS ユーザーズマニュアル

11

920-087-04

If the wall is thicker than allowed in the notes in Figure 6, a sheet 
met al wall sleeve ex ten sion 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 baffl 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 prop er 

mount ing of the grille.

4.  Caulking is required at all sites where condensate or 

ex ter nal water could potentially  infi 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 overfl ow slots must be kept clear 

of sealant and gaskets so con den sate can fl ow 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 seal ing 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.

Section II  —  Deep Wall Installation (PXWE)

Figure 8

Wall Sleeve Extension, 42" X 16" Frame, 20 gauge min i mum, painted or alu min i um

Wall Sleeve Extension Sealant Locations