Wall Openings, Louvers & Venitmatic Shutter - Daikin ARQ Installation Manual

Wall Openings, Louvers, and VentiMatic
Shutter
Self-Contained Floor Models ARQ, ERQ, GRQ are typically installed
in front of a wall opening containing a properly sized louver that is
designed to let in outside air while preventing water (such as rain) from
getting past the louver and into the unit itself. A weather-tight seal
keeps unwanted air and moisture from entering the occupied space. See
Figures 8 through 23, and table 1 for various louver details.
Figure 8: Horizontal and Vertical Blade Louvers, Without
Flange, (see Caution below for louver blade orientation
and drainage)
Bird Screen On Side Toward Unit
Outside Air
Horizontal Blade Louver
Bird Screen On Side Toward Unit
Outside Air
Vertical Blade Louver
CAUTION
Locate Drain Lip at bottom of vertical louver to allow proper
drainage. For horizontal louvers, the louver blades should face
down for proper drainage. Bird screen should always be on
side toward unit.
IM 1083
Bottom
Self-Contained WSHP Unit Ventilator Models ARQ, ERQ, GRQ
Figure 9: Horizontal and Vertical Blade Louvers, Without
Flanges With Grille or With Flange Without Grille
Vertical Louver with Flange, without Grille
Outside Air
Horizontal Louver
without Flange,
with Grille
Grille/Louver with weep hole
Rear of Horizontal Blade Louver with Birdscreens and Flange
VentiMatic Shutter Assembly
™
In many installations, an AAF
Assembly is specified. See figure 10. This one-way shutter is a
continuously variable, gravity actuated, room exhaust vent that operates
in direct response to positive static pressure. It opposes any airflow into
the room and allows a slight positive pressure.
It is important that the VentiMatic shutter and unit ventilator louvers
are mounted on the same wall. This neutralizes the effect of the wind.
Forcing excess air into the room through the unit ventilator louver
overcomes the same wind pressure that works to keep the VentiMatic
shutter closed. This prevents room air exhausting from the room through
the VentiMatic shutter.
Figure 10: VentiMatic Shutter Assembly
Outside
Louver
Note: Birdscreen and louver are shipped in one (1) piece.
Louver drain lip
-HermanNelson VentiMatic Shutter
® ®
VentiMatic Shutter
Roomside
Relief Air
Page 9 of 42
Flange
Flange