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VTS reserves the right to implement changes without prior notice
Ventus Air Handling Units
Attention! In the inspection door of the fan section is installed limit switch, which cause
the fan to stop in case of unauthorized opening of the door. The switch must be
connected to the frequency converter, accordance with the wiring diagram attached in
the separate manual: "Control and Modbus communication - appendix to the manual of
LG iC5 and iG5A frequency converters".
In case of powering the motor from a frequency converter, high-frequency currents or voltage
harmonic components in wiring powering the motor can generate some electromagnetic
interferences. Connection between the frequency converter and motor should be done using
shielded cables, in accordance with guidelines outlined in the operation and maintenance manual of
the frequency converter.
Before putting into service and after long time of storage or standstill, the resistance of insulation
between the casing and winding should be determined, applying direct current.
Minimal value of insulation resistance
for a new, renewed or repaired winding should be
10 M
Ω
in
relation to the ground.
Fig.20. Connecting power cables and clamps in a cable box of one-speed motors
Converter power supply
1x230V/50Hz
Converter power supply
3x400V/50Hz
Supplying power to the motor through frequency converter
Motor power supply
3x400V/50Hz
Marking on the engine
rating plate
