Procedure After Switching On The Power Supply During Initial Commissioning - Wilo -Stratos GIGA2.0-I Einbau- Und Betriebsanleitung

10.2 Procedure after switching on the
power supply during initial com-
missioning
Installation and operating instructions • Wilo-Stratos GIGA2.0-I, Wilo-Stratos GIGA2.0-D • Ed.02/2022-07
DANGER
Danger of personal injury and material damage due to ex-
tremely hot or extremely cold pressurised fluid!
Depending on the temperature of the fluid, when the venting device is
opened completely, extremely hot or extremely cold fluid may escape in
liquid or vapour form. Fluid may shoot out at high pressure depending on
the system pressure.
• Always exercise caution when opening the venting device.
• Protect the electronic module from any water escaping when venting.
Prime and vent the unit correctly.
1. To do this, loosen the air vent valves (Fig. I, Item 28) and vent the pump.
2. After venting the pump, tighten the air vent valves again so that no more water can
escape.
CAUTION
Destruction of the differential pressure sensor!
• Never vent the differential pressure sensor!
NOTICE
• Always keep to the minimum pressure!
• To avoid cavitation noises and damage, a minimum inlet pressure must be guaranteed at
the suction port of the pump. The minimum inlet pressure depends on the operating
situation and the pump's duty point. Accordingly, the minimum pressure must be de-
termined.
• The main parameters for defining the minimum inlet pressure are the NPSH value of the
pump at its duty point and the vapour pressure of the fluid. The NPSH value can be
found in the technical documentation of the respective pump type.
NOTICE
When pumping from an open tank (e.g. cooling tower), ensure that there
is always a sufficient liquid level above the pump's suction port. This pre-
vents the pump from running dry. The minimum inlet pressure must be
observed.
As soon as the power supply is switched on, the display starts. This can take a few seconds.
After the start-up process has been completed, settings can be configured (see "Control
functions" [} 170] section).
At the same time, the motor starts running.
CAUTION
Dry running will destroy the mechanical seal! It may cause
leakage.
• Ensure that a dry run of the pump is not possible.
Preventing the motor from starting when the power supply is switched on during initial
commissioning:
A cable jumper is set at the digital input DI1 in the factory. The DI1 is activated at the fact-
ory as EXT. OFF.
To prevent the motor from starting during initial commissioning, the cable bridge must be
removed before the power supply is switched on for the first time.
After initial commissioning, the digital input DI1 can be set as required via the initialised
en
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