14 Wilo SE 07/2019
en
Preparation • The current type and voltage must agree with the
specifications on the rating plate (4).
• Maximum back-up fuse: 10 A, slow-blow.
• Only operate the pump with sinusoidal AC voltage.
• Note switching frequency:
- On/off switching operations via mains voltage
≤ 100/24 h.
- ≤ 20/h for a switching frequency of 1 min.
between switching on/off via mains voltage.
• 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).
• Use a connecting cable with a sufficient outer diame-
ter (e.g. H05VV-F3G1.5) to protect against leaking
water and to ensure strain relief at the threaded cable
connection.
• Use a heat-resistant connecting cable where fluid
temperatures exceed 90 °C.
• Ensure that the connecting cable does not make con-
tact with either the pipes or the pump.
CAUTION!
Pulsed mains voltage can lead to damage to electronic
components.
• Never operate the pump with phase angle control.
• When switching the pump on or off using an external
control unit, deactivate any voltage pulsing
(e.g. phase angle control).
• For applications where it is not clear whether the
pump is operated with pulsed voltage, get the
control/system manufacturer to confirm that the
pump is operated with sinusoidal AC voltage.
• Switching the pump on/off via triacs/solid-state
relays must be examined on a case-by-case basis.
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