Armstrong World Industries 243, 302, 242, 122, 123, 203, 182 Magic-Pak Installation, Weather Sealing

ACCESSORIES Magic-Pak: HW/HWC

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Magic-Pak Installation

Before installing the Magic-Pak unit in the wall sleeve, it is important to consider the possibility of sound and vibration transmission through the wall. It is recommended that vibration isolation pads be installed evenly spaced across the outer edge of the bottom panel of the wall sleeve. The vibration isolator pads should be approximately 4" x 4" x 7/8" and con- structed of one piece of cork rubber with pieces of neoprene rubber adhered to the top and bottom.

Once the wall sleeve is properly secured to the supporting wall and the vibration isolators are in place, the Magic-Pak unit can be slid into the wall sleeve. The unit must be slid completely forward so that the outer edges of the unit touch the inside flanges of the wall sleeve. The unit can then be secured to the wall sleeve by bolting the top flange of the unit to the top turned-down flange of the wall sleeve with 1/4" x 3/4" bolts and washers.

Note: In applications where vibration isolation is of particular importance, rubber grommets (Armstrong P/N 9015A) can be inserted between the top flanges.

The wall sleeve alone is not adequate support for the full weight of the Magic-Pak unit. Additional, field-fabricated support must be provided between the rear flange of the return opening and the wall sleeve.

The use of vibrator isolator pads is required between the unit and the support and between the floor and the support.

Please refer to installation instructions and application manual for details on field-fabricated additional supports.

Weather Sealing

After assembling the wall sleeve, it is recommended that all panel con- nections and joints be sealed with caulk to prevent water and wind infiltration into the building.

Once the Magic-Pak is installed and secured to the wall sleeve, it is important to seal any gaps between the wall sleeve and the unit with caulk. This includes both sides, top and bottom. Sealing these gaps will prevent water and wind from leaking into the building between the unit and wall sleeve.

The outside of the wall sleeve must also be sealed with caulk on all four sides whether it is installed recessed or protruding.

SRM-HW/HWC

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