Installation and electrical connection
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Installation and operating instructions Wilo-Yonos PICO1.0
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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 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.
6.2.1
Preparation
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The current type and voltage must correspond to the specifications on the rating
plate.
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Provide maximum back-up fuse: 10 A, slow-blow.
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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 installation are observed and, if necessary, adjust the
RCD accordingly.
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Only operate the pump with sinusoidal AC voltage.
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Observe the switching frequency:
–
Switch-on/off procedures via mains voltage ≤ 100/24 h.
–
≤ 20/h for a switching frequency of 1 min. between switching on/off via mains
voltage.
NOTICE
The inrush current of the pump is < 5 A. If the pump is switched “on” and “off” via a
relay, it must be ensured that the relay is capable of switching an inrush current of at
least 5 A. If necessary, obtain information from the boiler/control unit manufacturer.
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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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Use a connecting cable with sufficient outer diameter (e.g. H05VV-F3G1.5) to pro-
tect against leaking water and to ensure strain relief on the threaded cable connec-
tion.
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Use a heat-resistant connecting cable where fluid temperatures exceed 90 °C.
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Ensure that the connecting cable does not touch the pipes or the pump.
6.2.2
Connecting the pump
Installing the Wilo-Connector
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Disconnect the connecting cable from the power supply.
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Observe the terminal assignment (PE, N, L).
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Connect and install the Wilo-Connector (Fig. 5a to 5e).
