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VTS reserves the right to implement changes without prior notice
Ventus Air Handling Units
of the thermostat protecting against overheating the air inside the heater caused by drop or lack of air
flow. Heating coils of the heater will be damaged if the system is turned on and the there is no air
flow.
The thermostat must be absolutely installed in the heater control system.
Thermostat functionality is based on the bimetal element properties, resulting in opening the heater
control circuit contacts at air temperature near the thermostat up to 65ºC. After emergency turn off,
the heater turns on automatically once the air temperature goes down by 20ºC. After intended or
emergency (caused by overheating) turning off the power supply, the supply-air fan has to operate
for some time (0.5-5 min), so as the heater's coils reached their normal temperature.
In case of the heater with smooth control of heating power output, all electric connections and
configuration of the heater's control should be done in accordance with the guidelines of the 'Electric
Heater - Operation and Maintenance Manual'.
Fig. 18. Examples of connecting one group of heating units (3 pcs) of the electric heater
a) triangle-shaped connection
b) star-shaped connection
