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WARNING
OPERATION RULES
The fan is rated for connection to AC 220-240V, 50/60 Hz single phase power mains.
The fan is designed for continuous operation always connected to the power mains.
Air flow direction in the system must match the direction of the arrow on the fan casing.
Ingress protection rating from access to dangerous parts and water penetration is IPX4.
The fan is designed for operation at ambient temperature range from +1°C up to +40°C.
The air temperature in the ventilation system must not exceed +60°C.
ELECTRONICS COTROL LOGIC
The fan TT XXX T is started after the external switch supplies control voltage to the input terminal LT,
for example, during switching of the light in a room.
After control voltage is off the fan continues running within the time period set by the timer from 2 to 30 min.
To adjust the turn-off time rotate the T timer knob clockwise to increase or counter-clockwise to decrease the
turn-off delay time accordingly (fig. 29).
WARNING
The timer circuit is under mains voltage. Disconnect the fan from power mains prior to any adjustments
and operations!
The fan delivery set includes a specially designed plastic screwdriver for fan settings adjustments.
Use the screwdriver to adjust the turn-off delay time or the humidity sensor set point.
Do not use a screwdriver, knife, etc. for adjustments not to damage the circuit board.
The fan TT XXX U (U1) fig. 31 is equipped with an electronic module TSC (speed controller with electronic
hermostat) for automatic speed control (air capacity regulation) depending on the air temperature.
The terminal compartment incorporates 2 control knobs:
for setting the motor speed;
for setting the electronic thermostat.
The LED indicator placed at the front panel of the fan to show the thermostat operating status.
To set the thermostat threshold rotate the thermostat control knob clockwise to increase or counter-clockwise
to decrease the temperature set point accordingly.
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