Nordyne E3 Series Owner's Manual And Installation Instructions page 10

NOTE: Refer to the instructions supplied with
any additional accessories for further installa-
tion details.
Filtering Methods - Non-Ducted Return Air
1. Without A/C or H/P uncased coil:
- use the fi lter supplied with the furnace;
ensure that the fi lter is installed mat side
down between the fi lter retainer and furnace
top (see Figure 4).
2. With A/C or H/P uncased coil:
- use the optional coil fi lters; the fi lter sup-
plied with the furnace is not used; REMOVE
AND DISCARD THIS FILTER.
3. With optional coil housing:
- see coil cabinet instructions for specifi c
fi ltering methods.
Filtering Methods - Ducted Return Air
1. Without optional coil housing:
- install a fi lter with a minimum unrestricted
medium area of 324 square inches in the
duct above the coil that is accessible for
monthly cleaning or replacement by hom-
eowner.
2. With optional coil housing:
-install a fi lter with a minimum unrestricted
medium area of 324 square inches in the
duct above the coil that is accessible for
monthly cleaning or replacement by hom-
eowner.
Optional Duct Connectors for
Downfl ow Systems
Duct connectors are recommended for heated
air distribution in under-the-fl oor duct systems.
With this system, furnaces may be installed on
combustible fl ooring without a separate sub-
base. Also, the furnace rear mounting plate
FLOOR CAVITY
x
SUPPLY AIR DUCT
Reducer
*Felt Seal
Corner
Spacers
Figure 5. Duct Connector Selection (Non-Platinum)
10
*OPENING TO DUCT
A= 13-1/4" (337 mm)
B= 10-3/4" (274 mm)
WITH PLATE (C) REMOVED
OPENING BECOMES
13-1/4" x 13-1/4"
C
X
*Indicates only applicable for Finger Tab Duct Connector
(see Figure 3) supplied with the duct connec-
tors is recommended for use with this type of
installation.
Selecting Duct Connector
Non Platinum Duct Connector
1. Determine depth of fl oor cavity from surface
of fl oor to top of supply air duct (see Figure
5).
2. Select appropriate model from Table 4
which matches X-dimension of fl oor cavity.
To maximize air delivery, remove reducer
(C in Figure 5) to obtain largest open area
that will fi t duct/fl oor construction.
NOTE: Duct connectors may be
installed in any one of four positions.
Platinum Duct Connector
1. The 14" round duct connector (903896) is
designed to connect directly to a 14" fl ex-
duct.
Grille
Furnace Filter
(not used with
A/C or H/P)
Figure 4. Grille Support Frame and Grille
Assembly
TOP VIEW
19"
(483 mm)
Frame
Fasteners (4)
Top of
Furnace
A
B