The pump is equipped with a built-in electronic control unit which manages its operation (pump ON/FF) and prevents damages. The electronics protects the pump against dry running conditions: 
Priming cycle: when started, the pump will perform the following operation until it is primed: four priming trials of 30” (motor ON) with pauses of 3” (motor OFF). If there is no water, i.e. if the priming trials fail, the pump will stop for an hour before trying to prime again. If also this trial fails, there will be a 5 hours pause. Afterwards, if the lack of water persists, the pump will try to prime every 24 hours until it has picked up a prime. Normal Operation: If, during the pumps operation, the water supply is inferior to the minimum delivery for more than 40”, the pump will go into alarm, and start a priming cycle. In this case the priming trials are made after 1, 5, and 24 hours until the pump picks up a prime. The electronic unit also protects the pump from damages that could be caused by the blocking of the Not Return Valve (NRV). Such blockings are generally due to dirt deposits, or sand and they cause the pump to operate also if there is no water demand from the end-user. The protection function stops the pump automatically every hour; if no damage is detected the pump re-starts immediately. If the VNR is blocked the pump goes into alarm and stops. In this case the pump can be re-started only after unplugging the pump and removing the obstruction to the VNR. The best working condition is with the pump be completely submersed in water. Anyway the motor’s cooling system allows the use at the minimum suction height for very short periods. The product manual available here on our website or here in our DNA software provides more information for this product usage and maintenance.

Hang the pump by passing the rope through the hole provided (see figure 5). Do not hang the pump by the handle. Do not install check valves near the pump delivery (distance less than 1 meter (3.28ft)). The pump already has a built-in check valve on delivery. It is recommended to install a small auxiliary tank (0.5 - 2 liters) that can be ordered as an accessory. If you want to install an additional non return valve it is recommended to position it downstream from the auxiliary tank.

Do not subject the motor to excessive starts per hour. It is strictly recommended not to exceed 20 starts per hour. It is advisable to use pipes having a minimum diameter of 1’’, to avoid the decrease of pump performance. The maximum submersibility of the pump depends on the length of the power cable: 12m (39.4 ft) in the case of a cable 15m (49.2 ft) long.

The pump has an air vent valve. This valve allows the pump to prime in a very short time. If the water level is lower than the valve level, some water may escape from the vent valve.

For more information always check the pump manual, the updated version of the instruction manual is always available here on the website.

Install the pump so that the pump suction is at least 1 m (3.28ft) above the bottom of the well to prevent the intake of sand and impurities. Use rigid metal pipes to hang the pump and secure the pipes with brackets at the top of the well.

For more information always check the pump manual, the updated version of the instruction manual is always available here on the website

The minimum dimensions for the pump passage in the collecting tank must be greater than a diameter of 160 mm (6.7 in). Hold the pump slightly up from the bottom to avoid possible noises/vibrations transmitted to the tank. The pump will make a noise if it is placed on the bottom of the tank. To avoid obstruction of the suction passages, it is recommended to check periodically that no dirt has accumulated in the collection trap (leaves, sand, etc.).

For more information always check the pump manual, the updated version of the instruction manual is always available here on the website.

After connecting the pump to the mains, the pump motor is switched off and the non-return valve is at rest: if this is not the case, the pump stops, and the motor will never start

In the normal case, however, the pump behaves as follows:

• If the hydraulic circuit upstream from the pump has a pressure higher than CUT-IN, the pump motor does not start, the priming is finished regularly.
• If the circuit is not under pressure (P<CUT-IN), the pump motor is started. In this case,

o If the hydraulic circuit goes under pressure (P>CUT-IN) and there is no flow, for example because the delivery tap is closed, the motor is switched off 10 seconds after starting: the pump is primed.

o If there is no flow or pressure for 20 seconds (P<CUT-IN), the pump goes into DRYRUN alarm and is switched off: the pump is not primed.

o Finally, if there is flow, the pump is primed and runs normally.

For more information always check the pump manual, the updated version of the instruction manual is always available here on the website.

The product manual available here on our website or here in our DNA software provides more information for this product usage and maintenance.