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CONTROL LOGIC
It is possible to control the fan rotation speed without options by voltage, as well as by thyristor controllers.
The speed controller is purchased separately.
Warning!
When adjusting the voltage, make sure there is no unusual noise or vibration at reduced motor speed.
The motor current may exceed the rated current during voltage regulation.
The fan is equipped with a thermal switch with no self-reset.
To reset the thermal relay, switch off the power supply.
Find and eliminate the cause of overheating.
Make sure the motor has cooled down to operating temperature.
Switch on the power supply.
Caution!
The thermal switch of the ТТ 100 and ТТ 125 models cannot be reset.
In case of overheating, replace the fan.
The TT 100/125/150/160 (R)V fans are equipped with a speed switch (Fig. 20).
The ТТ XXX T fan starts running after the external switch supplies control signal to the LT input terminal (for
example, during turning the light on).
After removal of the control signal the fan continues to run within the set time (adjustable with the turn-off
delay timer from 2 to 30 minutes).
To adjust the fan turn-off delay time, rotate the control knob T clockwise to increase and counter-clockwise to
decrease the turn-off delay time respectively (Fig. 19).
Warning! The timer circuit is under mains voltage. Disconnect the fan from power supply prior to any
adjustment operations. The fan delivery set includes a specially designed plastic screwdriver for adjustment of
the fan parameters. Use exclusively the delivered plastic screwdriver to adjust the turn-off delay time. Do not
use a metal screwdriver, knife, etc. for adjustment operations not to damage the circuit board.
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