Wilo -CronoLine IL 250 series Einbau- Und Betriebsanleitung Seite 40

6 Commissioning
6.1 Initial start-up
Check whether the shaft can be turned without rubbing. If the impeller jams or rubs
loosen the coupling screws and tighten them again with the requested torque.
Pump body, suction and inlet piping must be filled and properly vented. Vent
To avoid noise and damage resulting from cavitation, it is important to ensure a
minimum supply pressure at the air intake of the pump. The minimum supply
pressure depends on the location and point of operation and must be determined
accordingly. Considerable parameters in determining the minimum supply pressure
are the NPSH value of the pump at its operation point and the steam pressure of the
flow medium.
Check whether the direction of rotation is the same as that of the arrow on the pump
housing (see Fig. 5, Pos. 1) by switching on the pump for a short period of time. If the
direction of rotation is incorrect the following steps should be taken:
Y- -start: rearrange the location of the lead-in and lead-out wires on the tagboard of
the motor (e.g. V1 for V2 and W1 for W2).
6.1.1 Switching on
Only switch on the set when the blocking device at the outlet is closed!
Only open this slowly and set to the working point once full speed has been
reached.
The set must run smoothly and be free of vibrations.
The mechanical seal guarantees a seal without leaks and does not require a
specific setting. Any small leaks at the beginning will stop when the seal's run-in
phase is complete.
Installation and operating instructions
Wilo-CronoLine IL 250...
The pump must not run dry. Dry-running will damage the mechanical
seal!
Depending on the fluid temperature and the system pressure, if the
vent screw is completely loosened hot liquid or gas can escape or even
shoot out at higth pressure.
Beware of scalding!
As soon as all work is finished, , all scheduled safety and protective
devices must be properly fitted and put into operation.
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English
WILO AG 08/2006