McQuay ARQ Installation Manual

Installation and Maintenance Data IM 473-1

Group: Unit Ventilator
Part Number: 106101901

Date: June 1999

Louver & VentiMatic Shutter
Installation For AAF-HermanNelson® Classroom Unit Ventilators
(Models AVS, AVV, AVR, AHF , AHV, AHR, ARQ and ERQ)

Horizontal
Blade Louver

Ventimatic Shutter

Vertical
Blade Louver

Uncrating and Inspection

Upon receipt of the equipment, check carton for visible dam­age. Make a notation on the shipper's delivery ticket before
signing. If there is any evidence of rough handling, the
cartons should be opened at once to check for concealed
damage. If any is found, notify the carrier within 48 hours to
establish a claim and request their inspection and a report.
The Warranty Claim Department should be contacted.

Inspect the carton for any specific tagging numbers indi-

cated by the factory per a request from the installing contractor.

©1999 AAF-HermanNelson IM 473-1 (Rev. 6/99)

Check the number against the plans to be sure that the

unit will be installed in the correct location.

Note: Installation and maintenance must be performed by
qualified personnel who are familiar with local codes and
regulations, and are experienced with this type of equipment.

Caution: Sharp edges are a potential injury hazard. Avoid
contact with them.

®

Installation Instructions

The louver supplied with these instructions is designed to let
in fresh air and to prevent water such as driving rain from
getting past the louver and into the unit. A weathertight seal
must be accomplished to keep unwanted air and moisture
from entering the occupied space. It is important to properly
install the louver per the instructions below.

1. If the fresh air opening has not yet been made, refer to
Figures 1 through 4 for the recommended locations.
Consult approved architectural plans for exact location.

2. Once the location has been selected, cut the opening in
the wall so that it is slightly larger than the louver being
installed.

3. If the opening has already been made, measure it to be
sure there is a minimum of

1

⁄2" (13mm) clearance around
all sides. Note that for masonry installations, a lintel
must be installed above all louvers. The louver is not
designed to replace the lintel.

4. Before setting the louver, construct a sloping mortar
base to drain unwanted moisture to the outside. A
typical method is shown in Detail A. The mortar base
should be 1" (25mm) thick at the unit and taper toward
the louver. The 1" (25mm) thick mortar at the unit also
acts as backing against which the open cell gasket of the
unit can seal.

If it's not possible to make a mortar base as de­scribed above, then field supplied flashing must be
installed. A typical installation using flashing is shown in
Detail B. This flashing should terminate flush with the
exterior of the building. Place a bead of caulk under the

flashing to prevent moisture from wicking back to the
unit. Do not caulk the joint between the louver and

the flashing. This joint is designed to let unwanted
moisture escape.

5. Before setting the louver, make sure the drain lip (verti­cal) or drain holes (horizontal) are at the bottom and the
bird screen is towards the unit.

6. Place a heavy bead of caulk along the top and two sides
of the louver. Leave the bottom of the louver uncaulked
so that if moisture gets into the area between the louver
and the unit, it may drain outside unrestricted.

7. Place the louver in the opening so that it is recessed a
minimum

1

⁄16" (2mm) beyond the building facade or as

directed by the architect.

8. Mechanical fasteners may be desired or required to
further secure the louver in the wall. Employ a method
that is appropriate to the installation.

9. After the louver is solidly in place, run a bead of caulk
around the perimeter of the louver to seal it weathertight.

Caution: Do not plug the weep holes of the horizontal
louver nor the drip line of the vertical blade louver. This
will restrict the flow of unwanted moisture to the outside.

10. If flashing is used in place of a mortar base, caulk the
flashing where it meets the inside of the opening be­tween the louver and the unit. This will prevent moisture
from getting under the flashing and into the occupied
space.

Detail A

Louver

No
Caulk

Page 2 / IM 473

Wall Unit

Cement Mortar;
Pitch Away
From Unit

1" (25mm)

Typical Installation Methods

Detail B

Louver

Unit Gasket

Floor

No
Caulk

Caulk
(By Others)

Wall Unit

Flashing
(By Others)

1" (25mm)

Unit Gasket

Floor