Adjusting Blower Speeds; Cooling Mode; Heating Mode; How To Remove The Blower - Fedders FV95A054 Installating And Operation Manual

70-4 Cool S3

ADJUSTING BLOWER SPEEDS

Cooling Mode

Switch
The unit is factory set to provide the highest airflow.
Model
Desc. Bank Switch Pos.
Adjustments can be made to match the furnace with a small-
er cooling coil by changing the DIP switch or jumper settings,
located on the integrated ignition control board. Refer to
the Cooling DIP switch or jumper settings table for instructions
85-4 Cool S3
on how to set the switches. Please note that if the furnace is
to be matched to the lowest airflow for cooling, the "Adjust"
DIP switches or jumper setting must be set to the decreased
S3
setting. When using this setting, it is recommended that the
Heating DIP switches or jumper setting be set for Nominal-
Plus.

Heating Mode

The unit is set from the factory to operate at the center of
the temperature rise range. For this model furnace, the air
temperature rise is between 35 and 65 degrees F. Heating
airflow can be increased or decreased by changing the
heating mode DIP switches or jumpers, located on the inte-
grated ignition control board, to the Nominal-plus/minus
settings. Please note that Nominal-plus will decrease the
air temperature rise and the Nominal-minus will increase
the air temperature rise. At the end of a call for heat, the
main blower has a fixed off delay at a reduced airflow to
remove residual heat from the heat exchanger.
WARNING
Make adjustments to the controller with the electrical
power off.

How To Remove The Blower

1. Disconnect power from furnace.
2. Remove thermostat wiring from the integrated furnace
control.
3. Remove L1, Neutral and Ground connections between
the integrated furnace control and the Furnace
electrical connection junction box.
4. Remove 12 pin male molex connector from female
connection point, and ground connection from
integrated furnace control.
5. Unscrew 2 blower housing bolts located in the front
blower shroud as indicated in figure 15 (right). Remove
front blower shroud from furnace.
6. Slide blower assembly towards front of furnace. Blower
is mounted on rail system, and will slide forward about
10 inches before blower is clear of rails.
1 On
a
1150 3
Off
2
Off
1
1000 2.5
On
2
On
1
810 2
On
2
On
1
650 1.5
2 On
1 Off
b
1550 4
CFM AC Tap
2 Off
Ton
1 On
1 Off
1350 3.5
b
1350 3.5
2 Off
2 Off
Off
1
a
1150 3
1 On
On a
2
1150 3
Off
2
On
1
Off
1000 2.5
1
On
2
On
2
On
1
On 810 2
1
2 On
810
On
All Delay
A
B
C

How To Install The Blower

D
1. Place blower into blower compartment.
2. Keep blower assembly tight to top of blower
A
compartment. Line up blower assembly to slide into
blower rails. Push blower assembly towards back of
urnace ensuring blower assembly is correctly placed in
B
A
blower rails. Insert blower shroud on the front of the
blower housing. Insert blower housing bolts and
B
tighten.
A
3. Connect thermostat wiring to the integrated furnace
C control.
4. Connect L1, Neutral and Ground connections between
the integrated furnace control and the furnace
D
electrical connection junction box.
5. Connect 12 pin male molex connector to female
A
connection point, and ground connection to the
integrated furnace control.
B
6. Turn on power to the furnace.
A
C
B
Ensure that there is a drip bend in the connect wires to
C
B the blower motor to prevent condensate from following
the wire into the connector.
D
C
FIGURE 15
BLOWER BOLTS
37
S4
Off
5
C
delay
On
6
On
5
B
On
6
On
5
D
6 On
WARNING
Bolts
No No
delay
Off 30
On 30
Off 180
On 30