18
WILO SE 11/2017
en
Preparation
• The current type and voltage must agree with the
specifications on the rating plate (7).
• Maximum back-up fuse: 10 A, slow-blow.
• Only operate the pump with sinusoidal AC voltage.
• Note the 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 sufficient outer diameter
(e.g. H05VV-F3G1.5) to protect against leaking water
and to ensure strain relief on the threaded cable con
-
nection.
• 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 cause 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 pulse (e.g. phase
angle control).
• For applications where it is not clear whether the
pump is operated with pulsed voltage, get the con
-
trol/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.