5 Electrical connection
5.1 To do before the electrical
connection
• Make sure that the electrical connection agrees with the
product specification on the motor name plate.
• Make sure that the environment for electrical connection
is clean and dry.
• Make sure that the wiring diagram that is included with the
supply of the product agrees with the terminals in the con-
nection box.
5.2 To connect the product to the
power supply
• Complete the electrical connection for the motor. Refer to
14 Wiring diagrams.
• Make sure that the cross section of the protective earthing
is equal to or larger than the cross section of the phase
conductor.
• Install a circuit breaker in the permanent electrical installa-
tion, with a contact opening of a minimum 3 mm at each
pole.
• If a residual current device (RCD) is installed, make sure
that it is an all-current sensitive RCD.
Warning
Do not use VFD (Variable Frequency
Drive) for speed control.
Note:
ATEX approved motor protection is required. Systemair
recommend U-EK230E motor protection.
6 Commissioning
Caution
• If strong vibrations occur during
commissioning, immediately increase
or decrease the fan speed until the
vibrations are decreased. Continuous
strong vibrations can cause damage
to components.
• Do not increase the fan speed to a
higher rpm value than the maximum
value that is given on the name plate.
The commissioning report is found at www.systemair.com.
6.1 To do before the
commissioning
• Make sure that the installation and electrical connection
are correctly done.
• Make sure that PTC resistors and monitoring units are
professionally connected and fully functional.
• Verify that connection data corresponds with the data on
the rating plate: Max. voltage +6%, -10%, according to
IEC 38. Rated current/power must not be exceeded at
rated voltage.
• Do not have lower static back pressure than the minimum,
refer to tables in 12 Technical data.
• The voltage of controllable fans is permitted to vary be-
tween 15% and 100% of nominal voltage with a transform-
er and between 25% and 100% with a thyristor.
• Make sure that the motor protection function.
• Make sure that the impeller do not hit parts of the fan
housing (min. 3 mm).
• Visually examine the product and accessories for damage.
• Make sure that the safety devices are correctly installed.
• Make sure that there are no blockages in the air intake
and the air outlet.
• Make sure that installation material and unwanted objects
are removed from the product and the ducts.
6.2 To do the commissioning
1 Set the installed safety switch in the OFF position.
2 If it is possible to get access to the fan impeller, do the
steps that follows:
a. If it is necessary, remove parts of the installation.
b. Turn the fan impeller by hand and make sure that it
turn easily.
c. Record the result in the commissioning report.
3 Make sure to turn the product in a direction that agrees
with the related arrow on the product.
a. Record the result in the commissioning report.
4 If you removed parts of the installation to get access to
the fan impeller, install the removed parts again.
5 Set the installed safety switch in the ON position.
6 Start the product.
7 Set the minimum operation speed.
9
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