Lennox International Inc PWC18E4.8, PWC24E9.2, PWC302 Z9- -,4, Instailing Wall Sleeve from Inside

Further sealing against air infiltrationmust be done alter the Magic-Pak unit is installedin the wall sleeve and utility connections have been completed (see Sealing/Weath- erproofing Wall Sleeves section).

Wall Sleeve Installation

The wall sleeve may be installedfrom either the inside or outsideof the building.

Some builderswill attach the wall sleeve to the support wall through the side supportangles whether they are inserting the sleeve from the outside or the inside.Othem willuse the side angles simplyas a locating"stop"to achieve the appropriatedimension while shootingfasten- ers through the sides of the wall sleeve into the supporting wall. In either case, the wall sleeve must be fastened to the supporting wall and not to the finished wall.

The sleeve may extend farther than 1"beyond the finished wall, but reaching the perimeter of the opening from inside

for sealing becomes increasinglydifficult.In any case, adequate safety precautions must be considered to

protectpersonnel.

Instailing Wall Sleeve from Inside

The most popular method of installingthe wall sleeve is from the inside of the buildingwith the weather seal applied from the outside as the finish wall is applied.

Instalflng Wall Sleeve from Outside

In many high-rise constructionapplications,contractors insert the wall sleevesfrom the outside while the wall is

being constructed.The two-sided support angles should then be attached to the wall sleeve sides at a locationthat

will exceed the thicknessof the outside finish wall bythe recommended 3/8" to 1"dimension.

For example, if the supportingwall is concreteblockwith a brickfacing, there is usually a space between the block and the brick.This space dimension must be added to the width of the brick (plus 3/8" to 1") so that when the sleeve is inserted intothe blockwall opening, up to the angles and fastened to the blockwall before the brick is installed, the sleeve wilt protrude beyond the finished brickby 3/8" to 1", as needed for caulk sealing.

The same applies if the supportingwall iswood frame. One may insert the sleeve from the outside up to the angles located on each side, allowing for the thicknessof sheathing, finish siding, and caulk sealing.

Recessed Sleeves

In some applications, where either the buildingwalls are very thick (over 16") or architecturaldesign dictates,units

can be recessed. Avoid recessing the wall sleeve ifthe wall opening is required to be the same size as the wall

sleeve opening. However, if the wall opening can be larger in verticaldimension than the wall sleeve so that the

bottomcan rest on a sill that is at least 2" higher than the bottomof the wall opening, some recessing is permitted.

This sillshould be recessed further than the sleeve by 3/8" to 1"to permitweather-seal caulking along the bottom edge withoutpluggingthe drain holes in the sleeve.

The top of the wall opening should be above the top of the wall sleeve by a dimension equal to or greater than the amountof the recess in order to avoid restriction of the condenserdischargeair.

Sealing/Weatherproofing Wall Sleeves

Ahighgrade non-hardeningcaulking compound approved for exterior use must be applied outside around the perimeter of the wall sleeve and the finished wall. Caulk

shouldalso be applied around the sleeve'sperimeter and the finishedinteriorwall.

Final sealing against air infiltrationmust be done alter the Magic-Pak unit is installedin the wall sleeve. For additional

protection,the space between the unit and the wall sleeve shouldbe sealed on all sides with a bead of sealant.

Wall Sleeve Dimensions (in.)

<.. 1or 3_/4

.16,.._15 or 12_

-$--

I

i

45

2--I=I

I

_t._ !

I.---- z9- -,4

Flar_es may b_ assembl_l

1"or 5_/4" from this e_e of the elc_v_

Figure 2