Nordyne E2EH-xxx HB Series Owner's Manual & Installation Instructions page 16

NOTE: Refer to the instructions supplied with
any additional accessories for further installa-
tion details.
Filtering Methods - Non-Ducted Return Air
1. Without optional upflow stand: (see Figure 18)
-install a filter with a minimum unrestricted
medium area of 324 square inches below
the coil cabinet/furnace assembly that is
accessible for monthly cleaning or replace-
ment by the homeowner
2. With optional upflow stand: (see Figure 17)
-stand must use two filters; one is supplied
with the stand and the other MUST be
removed from the furnace and placed in the
stand - see upflow stand instructions for
additional details.
Filtering Methods - Ducted Return Air
1. Install a filter with a minimum unrestricted
medium area of 324 square inches below
the coil cabinet/furnace assembly that is
accessible for monthly cleaning or replace-
ment by the homeowner
Applications and Furnace
Installation
NOTE: Remove refrigerant line knockouts in
furnace only when installing indoor coil of an air
conditioning or heat pump system.
Refer to instructions supplied with accessory
equipment.
Coil Cabinet
Air Filter
Braced
Mounting
Platform
Front
Grille
Figure 18. Over-the-Floor Return Air
System
16
Over-the-Floor Return Air System
(Non-Ducted)
1.
2.
3.
4.
5.
6.
7.
NOTE: Be certain to provide an adequate free
return air area as described under Return Air
Codes and Requirements and Closed-Off
Space Requirements.
Through-the-Floor Return Air System
(Ducted)
1.
WALL
2.
FLOOR 3.
Non-combustible
Pan or
Enclosure
4.
If floor underneath furnace is made of com-
bustible material, locate a pan fabricated of
non-combustible material with 1" upturned
flanges under furnace return air opening
(see Figure 18).
Use optional upflow stand with filters or
construct a suitably braced mounting plat-
form in closet (see Figure 17 or 18).
Install 240V supply circuit(s) and 24V wir-
ing to closet (see Figure 16 for appropriate
locations).
Position optional coil cabinet onto upflow
stand or mounting platform and secure with
three or more fasteners.
Position furnace in upflow mode onto coil
cabinet and secure with two or more fasten-
ers.
Use optional upflow duct connector or field
supplied connector to attach furnace to
overhead supply duct. (see Figure 17)
Install return air grille in closet preferably at
same level as upflow stand or below mount-
ing platform (see Figure 18).
Prepare Floor Opening(s):
a. Mark floor opening(s) as shown in Fig-
ure 19. Provide minimum clearances at
rear and left side walls of closet for
installation of furnace 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 furnace.
If return air duct is made of combustible
material, locate a pan fabricated of non-
combustible material with 1" upturned
flanges under furnace return air opening.
Install 240V supply circuit(s) and 24V wir-
ing to closet (see Figure 16 for appropriate
locations).
Position optional coil cabinet over floor
cutout and secure with three or more fas-
teners.