Nordyne Single Package Heat Pump R-410A Manual Do Utilizador

6

The supply and return fi ttings are included with 
the unit and located in the supply duct. They 
attach to the unit openings (Figure 4) with a 
fl ange and bead arrangement and may be, 
secured with two sheet metal screws. Note: For 
easier access, install fi ttings before positioning 
unit in fi nal location.

Supply Duct
1.  Position the supply duct collar so the edge of 

the unit opening fi ts between the fl ange and 
the bead.

2. Overlap the collar ends keeping the small 

screw holes underneath.

3.  Align the holes in the crimped area and install 

one screw. Note: It may be necessary to loosen 
the four screws that hold the transition duct 
in order to install the supply fi tting. Re-tighten 
when installation is complete.

4.  Tap collar (if necessary) to ensure engagement 

with unit opening and install second screw.

5.  Tighten fi rst screw and rotate collar clockwise 

so joint is near three o’clock position.

Return Duct
1.  Align the slots with the holes in the collar and 

install two screws.

2.  Position the collar over the opening and align 

the four notches in the collar with the four 
dimples in the panel.

3. Using self-drilling screws (10-16x.5) attach 

the collar to the rear panel.

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 the 12” x 20” grille furnished. The 
return air grille can be placed in the wall of a closet 
and the air 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 5) 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 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.