TECVENT AS • Svallerup Bygade • DK Kalundborg • Tel • Fax
VAT No DK • Reg No • Jyske Bank • email tecventtecvent dk • www tecvent dk
Operation
Start-up:
If the fan is connected to a frequency converter slowly increase the frequency from 0 to 50 Hz. If
any noise or smo e suddenly develops, shut-down the fan immediately. Find out what caused the
noise or smo e, for instance by opening the inspection hatches, or disassembling the fan. Find
maximum speed for the fan on the nameplate.
If the fan is connected to the power supply trough a soft starter - star/delta or direct start just start it
up. If any noise or smo e suddenly develops, shut-down the fan immediately. Find out what caused
the noise or smo e, for instance by opening the inspection hatches, or disassembling the fan. Find
maximum speed for the fan on the nameplate.
Ma e sure that the direction of rotation is right. The arrow on the fan indicates the right direction of
rotation.
Operation instruction:
If the fan is driven by a frequency converter:
When the fan speed is increased, the fan needs power to accelerate, besides the power normally
used by the fan. If the frequency converter gives a maximum current fault during acceleration, then
decrease acceleration to avoid the problem. When the fan is deceleration, the fan uses less power
than normally used by the fan.
When the fan is running it should be chec ed regularly. When chec ing the fan the following
should be observed:
a) Any unusual noise or smo e.
b) Fan bearing oil/grease level.
c) Fan bearing temperature (maximum 80 °C).
d) Fan vibration level if monitored continuously.
e) Motor temperature.
f) Motor vibration level if monitored continuously.
If the vibration level is not monitored continuously this should be chec ed at least once a month.
Any trend for raising vibration level will indicate that the bearings should be changed during a forth
coming scheduled shut-down.
