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9.1
Initial commissioning
9.2
Filling and venting
58
NOTICE
It is recommended to have the pump commissioned by the Wilo cus-
tomer service.
The pump has to reach ambient temperature before commissioning.
•
Check whether the shaft can be rotated without any grinding. In case the impeller is
blocked or grinds, loosen the coupling screws and tighten them again with the specified
torque. (See table on screw tightening torques).
•
Fill and vent the system appropriately.
CAUTION
Dry running will destroy the mechanical seal! It may cause
leakage.
• Ensure that a dry run of the pump is not possible.
WARNING
There is a risk of burns or freezing upon coming into contact
with the pump/system.
Depending on the pump and system operating conditions (fluid temper-
ature), the entire pump can become very hot or very cold.
• Keep a safe distance during operation!
• Allow the system and pump to cool down to room temperature!
• Always wear protective clothing, safety gloves and safety glasses
when working.
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.
Fill and vent the system correctly.
1.
To do this, loosen the air vent valves and vent the pump.
2.
After venting the pump, tighten the air vent valves again so that no more water can
escape.
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.
1.
By briefly switching on, check whether the direction of rotation agrees with the arrow
on the fan cover. If the direction of rotation is incorrect, proceed as follows:
•
For direct starting: Swap two phases on the motor terminal board (e.g. L1 for L2).
Installation and operating instructions • Wilo-VeroLine-IPL-Z, Wilo-VeroTwin-DPL-Z • Ed.01/2024-07
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