Vents KSD 250-4E, User Manual, Page: 9 / 24

9
TSC MODULE
DESCRIPTION
AND
FUNCTIONING
Electronic temperature and speed controller
Available in KSD U, KSD U1, KSD Un, KSD U1n.
The electronic speed and temperature control module is designed for duct temperature
control and automatic variable speed control (air flow control) depending on the temperature.
KSD U, KSD U1 models are equipped with a built-in temperature sensor and the
KSD Un, KSD U1n models are equipped with an external temperature sensor fixed
on a 4 m cable.
The front panel of the fan (fig. 3, 4) has the following controls and indicators:
Speed control knob 9
Temperature control knob 10
Fan operation indicator 11
Thermostat indicator 12
The functioning logic of the electronic speed and temperature control module enable fan
speed control depending on the air temperature in the air duct.
Depending on the fan model the return to pre-set lower speed has two delay patterns:
- temperature sensor-based feedback delay for KSD U and KSD Un models;
- timer-based feedback delay for KSD…U1 and KSD U1n models.
Operation of the electronic temperature and speed control module for
KSD U, KSD Un models.
Set the desired air temperature (thermostat set point) by turning the thermostat control knob
10 and the minimum rotation speed (air flow rate) by turning the speed control knob 9.
The fan operation indicator 11 lights up as the fan is started.
If the air temperature increases above the thermostat set point the fan switches to the
high speed (maximum air flow rate). Synchronously, the thermostat indicator 12 lights up.
If the temperature decreases below the thermostat set point the fan switches to the pre-set
lower speed.
KSD