920-087-04

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:

1Provision 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.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 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 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.

Figure 8

Wall Sleeve Extension Sealant Locations

IMPORTANT NOTE: The silicone bead MUST extend 3" up the side of the two flanges to prevent condensate from leaking.

Wall Sleeve

Outside Edge

Insulation

Air Baffles

Sealant inside (4) bottom corners

 

 

Condensate

 

 

 

Drip Panel

 

 

Drip

(Field

Condensate

Width of Wall

Edge

Supplied)

Notches (4)

Wall Sleeve Extension, 42" X 16" Frame, 20 gauge minimum, painted or aluminium

PXWE Wall Sleeve

Extension

11

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Friedrich HEAT PUMPS manual Section II Deep Wall Installation Pxwe, Extension Installation
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HEAT PUMPS specifications

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