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V-FloFan
4.2.2
Speed control
Verify that this fan is suitable for speed control. On the datasheet and rating
plate the following (combination of) codes can be found:
F = suitable for frequency control / VFD (Variable Frequency Drive)
E = suitable for electronic voltage control (TRIAC / phase cutting)
T = suitable for transformer voltage control
WARNING
If none of these codes is listed, this fan cannot be speed con-
trolled!
Variable Frequency Drive (FC / frequency control)
• Do not reduce the frequency to less than 20% of the nominal frequency
as listed on the rating plate.
• When using a variable frequency drive, the wiring instructions of the vari-
able frequency drive manufacturer must be followed.
WARNING
Do not increase the frequency beyond the nominal value as lis-
ted on the rating plate
Electronic Voltage Control (TRIAC / SOLID-STATE / phase
cutting)
• Do not reduce the voltage to less than 40% of the nominal voltage as lis-
ted on the rating plate.
• Motor noise (humming) can occur due to this type of control
Transformer voltage control
• Do not reduce the voltage to less than 40% of the nominal voltage as lis-
ted on the rating plate.
5
Commissioning
Before initial start-up verify that:
1.
Installation and electrical connection have been properly completed.
2.
No foreign material is present within the fan and fan housing.
3.
All necessary safety devices such as guards are in place.
Initial start-up
1.
Briefly switch on the power supply and check if the impeller rotates in the
correct direction. Correct if necessary:
– For 3~ fans interchange any 2 of the 3 phases of the supply.
– For 1~ fans contact your supplier.
2.
Run the fan and check for quiet (no unusual noises), low vibration opera-
tion. Check that the current draw is within the full load limits as listed on
the rating plate and datasheet.
3.
Refer to the troubleshooting section of these instructions if anything
seems out of the ordinary.
INS00008-D
Original instructions
Illustration 11: V-FloFan impeller rotation direction
6
Operation
Always be alert when the fan is in operation. Immediately switch off and
isolate the fan from the electrical supply if anything seems out of the ordinary.
Refer to the troubleshooting section of these instructions if anything seems
out of the ordinary.
NOTICE
The V-FloFan is very susceptible to other airflows that can dis-
rupt a good functioning:
Do not use horizontal airflow fans at the same time as when the
V-FloFan is in operation.
In greenhouses, do not operate the V-FloFan when the window
vents are open.
Infrequent use
If the fan is used less frequently than once per month, run the fan each month
at least 2 hours at full speed to avoid buildup of moisture in the fan motor and
to keep the bearing lubricant in good condition.
DANGER
If the built-in thermal protection is in series with the power sup-
ply and is activated, the fan motor will automatically re-start
after cooling down.
Risk of injury due to unexpected start.
CAUTION
The fan motor can get hot during operation
Do not touch it to prevent burns
7
Maintenance
DANGER
Switch off and completely isolate the fan from the electrical
supply before commencing maintenance.
WARNING
All moving parts must be at a complete standstill before com-
mencing maintenance.
ENGLISH | 7
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