How It Works; Monitoring Devices; Operating Modes - Wilo Actun OPTI-MSH Einbau- Und Betriebsanleitung

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4.2.

How it works

The pump can be switched on and off using a separate switch (main switch or DC
switch) that must be provided by the customer. The separate switch means the power
supply can be cut if required. The pump need not be switched on or off manually. When
the pump is switched on, it operates autonomously and is controlled as well as moni-
tored by the integrated electronics.
Connect accessories, such as the Wilo-MS Control switchgear and additional accesso-
ries (sensors), to implement pressure-dependent pump control.
Behavior during mains operation
After having switched on the power supply, the integrated frequency converter starts
up the pump to its maximum speed and the pump supplies at full power.
Behavior under solar power supply
After having switched on the power supply and as soon as the minimum voltage re-
quired to operate the motor has been generated, the frequency converter starts up the
pump. Depending on the available power provided by the solar panels, the frequency
converter generates the maximum available speed.
If the voltage drops below the required minimum value, the frequency converter switch-
es off the pump.
4.3.

Monitoring devices

The pumps are equipped with the following monitoring devices:
• Undervoltage
• Overvoltage
• Excess current
• Temperature
• Dry-running protection with pre-wired water level sensor
These functions are implemented by the integrated electronics system and do not have
to be connected separately.
4.4.

Operating modes

Operating mode S1 (continuous duty)
The pump can operate continuously at the rated load without exceeding the permissible
temperature.
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PRODUCT DESCRIPTION
WILO SE 11/2018 DIN A5