WARNING
To ensure uninterrupted operation, the device can gradually and automatically reduce performance
before shutting down following over-temperature. However, prolonged operation above the rated
temperature leads to a reduction in the life of the device.
6.2. Cooling
The motor and the inverter on-board are cooled by special fans through forced air circulation. In order to ensure
correct cooling, it is necessary that:
• the ambient temperature complies with the environmental specifications.
• the temperature of the pumped liquid complies with the environmental specifications.
• a distance of at least 150 mm is maintained between the motor / inverter unit and any surrounding walls.
6.3. Hydraulic connections
Install the pump horizontally on a sufficiently sturdy base raised from the ground (at least 10 cm). Preferably
use plastic pipes welded to the delivery and suction connections of the pump (external diameter 50 mm) using a
suitable sealing adhesive. The delivery and suction pipes must be correctly supported so as not to weigh down on
the pump connections.
6.4. SUND priming
In case of installation under the water level, fill the pump by slowly opening the gate valve in the suction line by
keeping the delivery gate open to let the air out. In the case of installation above the water level, remove the cover
and fill the pump by pouring water through the opening on the filter. Verify that the pump is properly primed before
starting it. Prolonged operation in non-primed condition can damage the pump itself.
7. Electrical installation
WARNING
Read the safety chapter carefully before continuing.
7.1. Grounding
DANGER
Make sure that the device and the loads connected to it are properly grounded with the appropriate
connection terminals before commissioning.
Ensure that the grounding system is compliant and refer to local regulations for grounding devices.
Each load must be fitted with its own earthing cable, the length of which must be as short as
possible. Do not make interconnected grounding connections.
Leakage currents may exceed 3.5 mA. It is recommended to use the reinforced ground connection if
necessary.
Use the following minimum cross-sections for ground cables:
• cross-section equal to the mains power cable cross-section up 16 mm
2
. (6 AWG)
• 16 mm2 (6 AWG) for mains power cable cross-section between 16 mm
2
(6 AWG) and 35 mm
2
(1 AWG).
• cross-section equal to half the cross-section of the power supply cable when the latter is greater than 35 mm
2
(1
AWG).
7.2. Protection devices
DANGER
It is recommended to install the appropriate protection devices upstream of the device, such as a
circuit breakers, fuses and a residual current device (RCD).
Fuses and switches.
SUND
15
