7
FAN OPERATION
MODEL: TF140-DC
FAN CONTROLS
1.
The
Power Box,
which is located inside the
fan housing, has three separate adjustments:
a)
Low Airflow knob
adjusts the low airflow
rate, ranging from a minimum 40 cfm to
the desired airflow rate, which is deter-
mined by the
Toggle Switch
settings.
b)
Time Delay knob
is adjustable from 3
to 30 minutes. When
Switch II
is turned
off, it controls the time delay before fan
reverts to the low airflow rate set by the
Low Airflow knob
.
c) Toggle Switch
positions determine the
desired airflow rate, ranging from 90 to
140 cfm.
2.
Switch I
and
Switch II
are located on the
Junction Box.
Refer to wiring diagram on page 6.
OPERATE FAN
3.
Switch I - ON
a) Fan will operate at the low airflow rate set by the
Low Airflow knob
.
4.
Switch I and II - ON
a) Fan will operate at the desired airflow rate determined by the
Toggle Switch
settings.
TIME DELAY
5.
Switch II - OFF
a) When
Switch II
is turned
OFF
, fan will continue to operate at the desired airflow rate for
the period set by the
Time Delay knob
, at which time it will automatically revert to the
low airflow rate.
TURN FAN OFF
6.
Switch I - OFF
POWER BOX
1 2 3
Toggle
Switch
is the position of switch
-
+
Time Delay
Knob
-
+
Low Airflow
Knob
80
90
110
140
1 2 3
1 2 3
1 2 3
1 2 3
6"
Switch
Position
Duct
Diameter
Airflow
(cfm)
6"
6"
6"
