Nordyne 13 Seer User's Manual And Installation page 7

CONNECTING THE RETURN AND SUPPLY
AIR FLEXIBLE DUCTS
a. The supply duct for all units is 12" in diam-
eter. The return duct is 14" diameter for all
air conditioning units.
b. The fl exible ducts can be connected to the
corresponding fi ttings with the clamps pro-
vided with the ducts. Note: All connections
should be leak tight or a loss in cooling
capacity will result.
c. The fl exible ducts may be cut to the required
length, see instructions packed with duct.
Keep all ducts as short and straight as pos-
sible. Avoid sharp bends.
d. Ducts may be spliced with sheet metal
sleeves and clamps. (See Ducting Instal-
lation Accessories page 6.)
e. Once the inner duct is connected to the
proper fi tting, the insulation and plastic
sleeve should be pulled over the connection
and clamped.
f. For homes with multiple supply ducts or for
special applications, a Y fi tting is available
to divide the supply air so it can be ducted
to different areas of the home for more ef-
fi cient cooling. Note: The Y fi tting should be
insulated for maximum performance.
Model
Wire Color /
P3RD Speed Tap
Red
2 Ton
Black
Red
2.5 Ton
Black
Red
3 Ton
Black
T1
T2
3.5 Ton Orange / T3
Red / T4
T5
T1
Orange / T2
4 Ton Red / T3
T4
T5
T1
T2
5 Ton Orange / T3
Red / T4
T5
* Factory Setting
Figure 7. Standard Motor Lead Connection
Motor Air Flow
Speed (0.3 In. WC)
Low 760
High* 1000
Low 760
High* 1000
Low 760
High* 1000
Low 750
Med/Low 1,000
Medium* 1,140
Med/High* 1,300
High 1,350
Low 1,340
Med/Low* 1,450
Medium* 1,650
Med/High 1,750
High 1,965
Low 1,340
Med/Low 1,450
Medium* 1,650
Med/High* 1,750
High 1,965
Elbow
P-Trap
Figure 8. Drain Trap
Blower Speed — For optimum system
performance and comfort, it may be necessary
to change the factory set speed. See fi gure 7 for
factory settings. To change the blower speed:
If Standard Motor (2, 2.5 and 3 Ton):
1. Disconnect all electrical power to the
unit and remove the service panel.
2. Place the desired blower speed lead on the
"COM" terminal. Use another wire tie (fi eld
supplied) to bundle the remaining motor
leads.
If High Effi ciency Motor (3.5, 4, and 5 Ton):
1. Disconnect all electrical power to the unit
and remove the blower panel.
2. Locate the orange and red wires terminated
to the blower motor. The orange wire controls
cooling operation while the red wire controls
heating operation.
3. Verify the required speed from the airfl ow
data found in fi gure 7. Place appropriate
wire on the appropriate motor speed tap for
the required airfl ow point.
Check all factory wiring per the unit wiring
diagram and inspect the factory wiring connec-
tions to be sure none loosened during shipping
or installation.
CAUTION:
To avoid personal injury or property
damage, make certain that the motor
leads cannot come into contact with
any uninsulated metal components
of the unit.
7