Vents VENTS VK, Manual

OPERATION GUIDELINES 

The fan is designed for connection to AC single-phase  220...240 V, 50/60 Hz power mains. The fans 
models VK 315 / VKS 315 are designed for connection to 220...240 V, 50 Hz power mains.
The fan is designed for continuous operation always connected to power mains.  

The fan is rated for operation at the ambient temperature ranging from +1 °C up to +45 °C.

Air flow direction in the system must match the pointer direction on the fan casing. 
Ingress protection rating against access to hazardous parts and water ingress- IP X4.

Transported air temperature: 
-  VK 100/ VK 100 Q/ VK 125/ VK 125 Q/ VK 150:  from -25 °C up to +55 °C;
-  VK 200/ VK 250/ VK 250 Q/ VK 315:  from -25 °C up to +50 °C;
- VKS 200/ VKS 315: from -25°C up to +45 °C.
The fan requires no grounding. 

ELECTRONICS OPERATING LOGIC 
The VK U (U1)

 model, fig. 11 is equipped with an electronic speed controller with electronic thermostat 

TSC for automatic speed control (air flow regulation) depending on air temperature. 

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 temperature-based control logic (VK U): 

to maintain air temperature with accuracy to within 2 °C. The fan 

changes its speed rarely. As  air temperature rises up to the set thermostat point, the fan switches to high 
speed. As air temperature drops down 2 °C below the set thermostat point or if the initial air temperature is 

The terminal compartment incorporates 2 control knobs:  
   - for setting the motor speed;
   - for setting the electronic thermostat set point. 
The thermostat operation light indicator is located on the fan cover. 
To set the thermostat threshold rotate the thermostat control knob  clockwise to increase or counter-
clockwise to decrease the temperature set point. 
To set the fan speed (air capacity) rotate the speed control knob  in the same way. 
The fan has a temperature-based and timer-based control logic. 

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