Operation With Wilo Control Devices; Operation With Frequency Converter (Of Other Manufacturers); Commissioning; System Filling And Venting - Wilo BAC Einbau- Und Betriebsanleitung

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7.5

Operation with Wilo control devices

7.6 Operation with frequency converter
(of other manufacturers)
U [kV]
pk
2,4
2,15 kV
2
1,6
1,2
0,8
0,4
0
0 0,2 0,4 0,6
400V (IEC 60034-17)
500V (IEC 60034-25, Level A)
690V (IEC 60034-25, Level B)
Fig. 5: Limit curve for the permitted impulse voltage
Upk (including voltage reflection and damping),
measured between the terminals of two branches,
depending on the rise time t
r
8

Commissioning

8.1

System filling and venting

26
1,56 kV
• Strictly follow the instructions provided by the manufacturer of the
1,35 kV
• Take to following points into account:
0,8 1 1,2
t [µs]
r
• Make sure that the pump does not run dry.
• The system must be filled before starting the pump.
• Keep a safe distance during operation!
• In the case of high water temperatures and system pressures, allow
• Always wear protective clothing, protective gloves and protective
• Always exercise caution when opening the venting plug.
The power of the pumps can be continuously controlled in combina-
tion with a control device (Wilo-VR-System or Wilo-CC-System).
This allows an optimised pump output in a given installation and is
also economically efficient.
Motors from Wilo/Salmson can generally be operated with external
frequency converters if these frequency converters comply with the
demands specified in the application guideline IEC /TS 60034-17 and
IEC/TS 60034-25.
The impulse voltage of the converter (without filter) must be below
the limiting curve shown in (Fig. 5).
This concerns the voltage at the motor terminals. This is not only
determined by the frequency converter, but also e.g. by the motor
cable used (type, cross-section, screening, length, ...
frequency converter. The rise times and peak voltages for different
cable lengths are specified in the corresponding installation and oper-
ating instructions.
• use suitable cables with a sufficient cross-section (max. 5% voltage
loss)
• connect the correct screening according to the manufacturer's rec-
ommendation of the frequency converter
• pass data lines (e.g. PTC-evaluation) separately from the mains
cable
• possibly use of a sinusoidal filter (LC) in agreement with the manu-
facturer of the converter
Operation is possible from 12.5 Hz up to 50 Hz. In case of low fre-
quency operation, it is recommended to start with 50 Hz and then
turn down to the selected value.
CAUTION! Possible damage of the pump!
Dry running destroys the mechanical seal
If a venting procedure is necessary (according to chapter 8.1.1 "Vent-
ing procedure – pump in pressure mode" on page 27 and chapter
8.1.2 "Venting procedure – pump in suction mode" on page 27),
observe the following instructions.
DANGER! Risk of burns or freezing to the pump when body parts
come into contact with the pump!
Depending on the pump or system operating conditions (fluid tem-
perature), the entire pump can become very hot or very cold.
the pump to cool down before all work.
goggles when working.
WARNING! Danger due to extremely hot or extremely cold pressu-
rised fluid!
Depending on the temperature of the fluid and the system pres-
sure, when the vent screw is opened completely, extremely hot or
extremely cold fluid in liquid or vapour form may escape or shoot
out at high pressure.
WILO SE 11/2013