During operation

CAUTION

Property damage through pressure surges!

Pressure surges can occur when switching off the pump. These pressure surges can damage the discharge pipe and the lifting unit.

Increase the follow-up time to prevent pressure surges. A longer follow-up time results in slurping operation. In slurping operation, the non-return valve closes more smoothly.

NOTICE

System malfunction through low delivery head!

If the delivery head is lower than 2 metres, the non-return valve does not close correctly. This lower counter pressure causes in a backflow of the fluid into the tank. This backflow results in a frequently switching on and off of the lifting unit, which can lead to a malfunction.

Open shut-off valves in the inlet and the discharge pipe.
Make sure that the maximum inflow is less than the maximum output of the system.
Do not open inspection openings on the collection tank and the non-return valve.
Make sure that the collection tank is sufficiently ventilated.