Wilo Stratos MAXO Série Notice De Montage Et De Mise En Service page 40

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Always deactivate the power supply from the pump and if ne-
cessary SSM and SBM!
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Never operate the pump without the module cover closed!
NOTICE
Nationally applicable guidelines, standards and regu-
lations as well as the requirements of local energy
supply companies must be observed!
CAUTION
Material damage caused by improper electrical connec-
tion!
Wrong connection of the pump leads to damage to the electron-
ics.
Applying incorrect voltage to SELV lines will result in incorrect
voltage in all pumps and on-site building automation devices,
which are connected to the SELV line, and can damage them!
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Observe the current type and voltage on the rating plate.
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In the case of twin-head pumps, individually connect and secure
both motors.
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Connect to 230 V low-voltage networks. When connecting to IT
networks (Isolé Terre electrical system), always make sure that
the voltage between the live wires (L1-L2, L2-L3, L3-L1 ➜
Fig. 14C) does not exceed 230 V. In case of error (ground fault),
the voltage between the live wire and PE must not exceed 230 V.
40
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When switching the pump on or off using an external control
device, deactivate any mains voltage pulse (e.g. burst-fired con-
trol)!
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Switching the pump via triacs/solid-state relays must be ex-
amined on a case-by-case basis.
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Make sure that the SELV lines have a maximum voltage of 24 V!
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During deactivation with on-site power relay: rated current
≥ 10 A, rated voltage 250 V AC
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Irrespective of the rated current of the pump, inrush peak cur-
rents of up 10 A may occur when the power supply is activated!
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Observe the switching frequency:
– Switch-on/off procedures via mains voltage ≤ 100/24 h
– Switch-on/off procedures via Ext. Off, 0 – 10 V, or via bus
communication ≤ 20/h (≤ 480/24 h)
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If a residual-current device (RCD) is used, it is recommended to
use an RCD type A (pulse current sensitive). Check that the rules
for the coordination of electrical equipment in the electrical in-
stallation are observed and, if necessary, adjust the RCD accord-
ingly.
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Consider the leakage current per pump I
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The electrical connection must be made via a fixed connecting
cable equipped with a connector device or an all-pole switch
with a contact opening width of at least 3 mm (VDE 0700/
Part 1).
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To protect against leakage and for strain relief to the threaded
cable connection use a connection pipe with sufficient outer
diameter ➜ Fig. 16. The cables near the screwed connection are
to be bent to form a drainage loop, to drain any accumulated
drips.
≤ 3.5 mA.
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WILO SE 2020-12