Duct Requirements; Supply Duct; Return Duct - Nordyne 13 Seer User's Manual And Installation

6 ft.
12"
Figure 2. Minimum Unit Clearances
3. CLEARANCES
Minimum clearances, as specifi ed in Figure
2, MUST be maintained from adjacent struc-
tures to provide room for proper servicing
and air circulation.
Do NOT install unit in a confi ned or recessed
area that will allow discharge air from the unit
to re-circulate into the condenser air inlet,
through the coil.
Service Access Clearance:
Blower access panel side .......................... 24"
Electrical compartment access panel side ... 12"
Clearance between overhang and top of
unit .........................................................72"
Clearance around condenser coil area to wall
or shrubs (excludes duct panel side) .......... 12"
Minimum clearance to combustible materials:
Combustible Base (Wood or Class A, B, or C
roof Covering material) ...............................0"
Supply and Return Air Ducts .......................0"
Duct Connection side ..................................0"
Transition Duct Screws
Supply Air
Figure 3. Return and Supply Air Fittings
4
24"
12"
14" Duct Dimples
Return Air

DUCT REQUIREMENTS

The supply duct system, including the number
and type of registers, will have much more ef-
fect on the performance of an air conditioning
system then any other factor. The duct must be
suffi ciently large to conduct an adequate amount
of air to each register.
4. INSTALL THE RETURN AND SUPPLY AIR
FITTINGS ON THE UNIT
The supply and return fi ttings are included with
select models. If supplied, the duct fi ttings are
shipped in the supply duct. They attach to the unit
openings with a fl ange and bead arrangement,
secured with two sheet metal screws. Note: For
ease of access, install fi tting before positioning
unit in fi nal location.

SUPPLY DUCT

Position the supply duct collar, if supplied, so the
edge of the unit opening fi ts between the fl ange
and the bead. Overlap the collar ends keeping the
small screw holes underneath. 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 instal-
lation is complete.
Tap collar as necessary to ensure engagement
with unit opening and install second screw.
Tighten fi rst screw. Rotate collar clockwise so
joint is near three o'clock position.

RETURN DUCT

Align the 14" return duct slots with the holes in
the collar and install two screws. Position the
Figure 4. Return Air Box