6
Figure 4. Return Air Box
2. Fasten the collar ends with two self drilling
sheet metal screws.
3. Position the collar over the opening and align
the 4 holes in the collar with the 4 holes (or
dimples depending on model) in the rear panel.
4. Using self-drilling screws (10-16x.5), secure
the collar to the rear panel.
Return Duct
1. Assemble the collar by overlapping the two ends.
NOTE:
One end of the collar is slotted and
the opposite end has two small holes. Position
the end with small screw holes underneath
the slotted end.
2. Fasten the collar ends with two self drilling
sheet metal screws.
3. Position the collar over the opening. Align the
four holes in the collar with the four dimples or
holes (depending on unit model) in the panel.
4. Secure the collar to the rear panel using self
drilling screws (10-16x.5).
Locating & Installing the Return Air Assembly
To simplify installation, locate and install the
return air assembly fi rst. If desired, the return
opening can be located inside a closet with
louvered doors that has an open area equal to
or greater than a 12” x 20” grille. The return air
grille can be placed in the wall of a closet and
the ducted into the fi lter box through a boxed-in
area at the closet fl oor level.
Make sure the fi lter
is readily accessible.
NOTE:
The return air box with grille and fi lter
(Figure 4) should not be located in heavy traffi c
areas like hallways or center of rooms. A good
spot is in a corner or under a table, if a minimum
two inch clearance is available.
1. Start the installation from under the home by
cutting a small hole in the sub-fl oor. Determine
how the fl oor joist location will affect cutting
the opening needed for the return air box.
NOTE:
Floor joists are generally located on
16” centers, leaving 14-3/8” between joists.
2. After measur ing the retur n air box
(approximately 12-1/4” x 20-1/4”), cut the
hole through the fl oor so that the box will fi t
between the fl oor joists. Care should be taken
when cutting through carpeting to avoid snags.
NOTE:
In most installations it will be necessary
to cut a similar hole in the fi berboard directly
under the hole in the fl oor. However, if the fl oor
is more than ten inches deep, it will only be
necessary to cut a hole for the collar on the
return air box or for the insulated duct.
3. Set the box into the opening and fasten with
screws or nails.
4. Put the fi lter and return air grille in place.
Figure 3. Return & Supply Air Collars
Transition
Duct Scre
ws
Supply Air
Return Air
Duct
Dimples
Connecting Return & Supply Air Flexible
Ducts
• Flexible ducts may be cut to the required
length and spliced with sheet metal sleeves
and clamps.
Keep all ducts as short and
straight as possible. Avoid sharp bends.
Please
follow all instructions packed with duct.
• Flexible ducts can be secured to the
corresponding collars with the provided
clamps. After the inner duct is connected to
the collar, pull the insulation and plastic sleeve
over the connection and clamp.
NOTE:
To
prevent a loss in cooling capacity, make sure
all connections are tight.
• Homes with multiple supply ducts (or special
applications), a Y fi tting is available for dividing
the supply air to different areas of the home for
more effi cient cooling.
NOTE:
For maximum
performance, insulate the Y fi tting.
Summary of Contents for Q5RD Series
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