Nortek Global E7ED DOWNFLOW - Over-The-Floor Return Air System (Non-Ducted); Through-The-Floor Return Air System (Ducted)

9
Figure 12. Over-the-Floor Return Air System
Coil Cabinet
Air Filter
Braced
Mounting
Platform
Front
Grille
Non-combustible
Pan or
Enclosure
WALL
FLOOR
0" (0 mm) Side
Clearance
to Furnace
Cabinet
CLOSET DOOR
6"
(152 mm)
0" (0 mm) Side
Clearance
to Furnace
Cabinet
CLOSET DOOR
1"
(25 mm)
Standard Closet Installation
Special 1" Clearance
Provide min. 235 sq. in. (1516 cm)
open free area in front or side wall
or in top of closet door
Provide min. 250 sq. in. (1613 cm
2
)
open free area in front or side wall
or in top of closet door
Figure 11. Closet Installation
Figure 13. Over-the-Floor Return Air System with
Upflow Stand
Upflow Duct
Connector
Furnace
Upflow Stand
Over-the-Floor Return Air System (Non-Ducted)
1. If floor underneath Appliance is made of combustible
material, locate a pan fabricated of non-combustible
material with 1” (25 mm) upturned flanges under
Appliance return air opening. See Figure 12 (page 9).
2. Use optional upflow stand (refer to the technical
specifications literature for part number) with filters or
construct a suitably braced mounting platform in closet.
See Figure 13 (page 9).
3. Route 230V supply circuit(s) and 24V wiring to closet.
See Figure 17 (page 13) or Figure 18 (page 13)
for appropriate locations.
4. Position optional coil cabinet onto upflow stand or
mounting platform and secure with three or more
fasteners.
5. Position Appliance in upflow mode onto coil cabinet
and secure with two or more fasteners.
6. Use optional upflow duct connector or field supplied
connector to attach Appliance to overhead supply duct.
See Figure 13.
7. Install return air grille in closet preferably at same
level as upflow stand or below mounting platform. See
Figure 12.
Through-the-Floor Return Air System (Ducted)
1. Prepare Floor Opening(s):
a. Mark floor openings as shown in Figure 2
(page 6). Provide minimum clearances at rear and
left side walls of closet for installation of Appliance
and wiring.
b. Cut floor opening on outside edge of marked line
so that opening is slightly larger than area marked.
c. Additional provisions may be necessary for optional
air conditioning if refrigerant lines are installed other
than at the front of the Appliance.
2. If return air duct is made of combustible material, locate
a pan fabricated of non-combustible material with 1”
(25 mm) upturned flanges under Appliance return air
opening.
3. Route 230V supply circuit(s) and 24V wiring to closet.
See Figure 17 (page 13) or Figure 18 (page 13)
for appropriate locations.