7
7. OPERATING INSTRUCTIONS
7.1 STARTING THE PUMP
Before using the pump, a few preliminary checks must be performed:
Check the integrity of the power supply cable and the unit prior to use.
If there is damage to the power supply cable or the unit, do not start operations!
Replace the damaged power supply cable with a new one.
The unit may only be opened and repaired by specialized personnel.
In order to prevent the danger of electrocution due to direct or indirect contact with live parts, the electric power supply line
must be suitably protected by a specific differential magnetothermic switch with a triggering threshold of 0.03 Ampere and
max triggering time of 1 second.
It is prohibited to use the pump if submersed in fluids or in a particularly aggressive or explosive/inflammable environment if
not previously prepared for that purpose by the supplier.
Use safety gloves or glasses as specified in the safety sheet for the lubricating oil
DO NOT use aggressive lubricants with NBR gaskets. In the case of doubt, contact the Dropsa SpA technical office to receive a
detailed card about the recommended oils.
Do not ignore the hazards to health and comply with the health regulations.
Check the integrity of the pump
Check that the pump is at the operating temperature and that there are no air bubbles in the pipes.
Check that the electric connection was carried out correctly.
Check the connection of the level and the pressure switch, if necessary, to the control panel.
Once the pump has started, check the direction of rotation of the electric motor: if it rotates backward, reconnect it as
shown in the wiring diagram provided with the motor.
7.2 INSTRUCTIONS FOR USE
1)
Press the start button on the machine to which the pump is connected or start it;
2)
Check that the pump starts;
3)
To change the pressure value, turn the adjustment screw (see Chap. 5). Turn it clockwise to increase the pressure or
counterclockwise to decrease it;
4)
Check that the machine lubrication is suitable (if there are doubts about correct operation, the Dropsa SpA technical office
can be contacted to request the inspection procedure).
The cut-off power of the switch must be = 10 kV and the rated current= 4 A
ATTENTION
:
All components must be ground connected. This applies both to electric components as well as to control
devices. For this purpose, make sure that the ground wire is directly connected. For safety reasons, the ground conductor
must be approx. 100 mm longer than the phase conductors. If the cable is accidentally disconnected, the ground terminal
must be the last to be disconnected.
