MTD 248-604A Manual de instalación descargar pdf (Pagina 13)

IM 1083 Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ Page 13 of 42

Personal injury hazard. Wear protective gloves to avoid possible

cuts and abrasions from exposed edges. Avoid contact with sharp

edges.

See gures 8 through 24. Before setting the louver, be sure the drain

lip (vertical louver) are at the bottom, horizontal louver blades face

down and the bird screen is towards the unit. See gures 23 and 24.

Place a heavy bead of caulk along the top and the two vertical sides of

the louver, leaving the bottom uncaulked so that if moisture gets into

the area between the louver and the unit, it can drain to the outside,

unrestricted.

If the louver is supplied with anges, (see gure 23) place an additional

bead of caulk on the inside of the top and side anges that come in

contact with the building facade. Do not caulk the bottom ange. Place

the louver in the opening and push it tight against the supplied building,

fastening it to the exterior of the building using fasteners (by others)

appropriate to the installation. Seal the top and sides with a waterproof

caulk to make it weather-tight. Do not caulk the bottom of the louver;

doing so might trap unwanted moisture behind the ange. (See gure 23)

If the louver is supplied with no anges, (see gure 24) place the louver

in the opening so that it is recessed a minimum 1/16" (2mm) beyond

the building facade or as directed in the architectural plans. If specied

in the plans, secure the louver in the wall using mechanical fasteners

(supplied by others) appropriate to the installation. (See gure 22 for

suggested fastening). With the louver solidly in place, run a bead of

caulk around the perimeter of the louver to seal it weather-tight. Do

not plug the weep holes (horizontal louver) or the drip line (vertical

louver). This might restrict the ow of unwanted moisture to the outside

(see gure 24)

See gure 21. If ashing was used instead of the sloping mortar base,

caulk the ashing where it meets the inside of the opening between the

louver and the unit. This helps prevent moisture from getting under the

ashing and into the room.

Louver

Caulk

Unit Gasket

Wall

Unit

1" (25mm)

Floor

Caulk

(By

Others)

Flashing

(By Others)

Figure 21: Typical Louver Installation with Flashing

CAUTION

Figure 22: Suggested method for fastening louver

(without ange) inside wall opening

Wall Opening

Louver

(Bird Screen Not Shown)

Angle Iron

(by others)

Room Side

Exterior

Caulk

(top and 2 Sides)

Louvers

Drain Holes

(Do Not Block)

Flange

(4 Sides)

1" Minimum

Lintels (By Others)

Bird Screen

Sealed Cement Mortar

Pitched Away from Unit

Toward Louver

Figure 23: Vertical or Horizontal Blade Wall Intake Louver

(Flanged) (Vertical Blade Shown)

Figure 24: Vertical or Horizontal Blade Wall Intake Louver

(Recessed Without Flange) (Horizontal Blade Shown)

Drain Holes (Do Not

Block With Mortar or

Caulking Materials

Bird Screen

Sealed Cement Mortar

Pitched Away from

Unit Toward Louver

1" Minimum

Lintels (By Others)

Louvers

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 41 42

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MTD 248-604A Manual de instalación Pagina 13

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