Fan Operation; Fan Controls; Time Delay - CFM TF140-DC Notice D'installation & Maintenance

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
150 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

FAN OPERATION

+
7
POWER BOX
-
+
Low Air ow
Time Delay
Knob Knob
Switch
Position
1 2 3
Air ow
90
(cfm)
Duct
6"
Diameter
1 2 3
-
Toggle
Switch
1 2 3
1 2 3 1 2 3
100 120 150
is the position of switch