Acnodes Q5RF SERIES user manual Return Air Box, Locating & Installing the Supply Dampers

NOTE: The return air box with grille and fi lter (Figure 6) 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 subfl 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 measuring the return 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 6. Return Air Box

Locating & Installing the Supply Damper(s)

When locating the supply damper(s), carefully check fl oor joists and frame members that could interfere with the installation of the damper or flexible duct.Ideally, the damper (Figure 7) should be located in the bottom of the main duct, forward of center of the home, at least three feet from the nearest register. The round supply opening in the slanted side of the damper should face the side of the home where the heat pump is located.

1.Locate the center of the heat duct by cutting a small hole in the fi berboard below the duct at the desired location.

2.Cut a hole approximately 3/4” larger than the damper opening in the fi berboard.

3.Cut a 9-1/8”x 13-1/8”hole in the duct and bend over all tabs fl at on the inside of the heat duct.

4.Insert the damper into the duct and bend over all tabs fl at on the inside of the heat duct.

5.Seal the opening between the fi berboard and damper or fl exible duct.

AUTOMATIC DAMPER IS CLOSED

WHEN HEAT PUMP IS OFF

Figure 7. Supply Damper

Connecting the Return and Supply Air Flexible Ducts

•The return duct for all units is 14” diameter.

•The supply duct for all units is 12” diameter.

•The fl exible ducts can be connected to the corresponding fittings with the clamps provided with the ducts. NOTE: To prevent a loss in cooling capacity, make sure all connections are tight.

•The fl exible ducts may be cut to the required length, see instructions packed with duct.Keep all ducts as short and straight as possible. Avoid sharp bends.

•Ducts may be spliced with sheet metal sleeves and clamps.

•Once the inner duct is connected to the proper fi tting, the insulation and plastic sleeve should be pulled over the connection and clamped.

•Homes with multiple supply ducts (or special applications), a Y fi tting is available to divide the supply air so it can be ducted to different areas of the home for more effi cient cooling. NOTE: For maximum performance, insulate the Y fi tting

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