10
7. INSTRUCTIONS FOR USE
7.1 STARTING THE PUMP
Before using the Mini-SUMO Atex 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 specialised 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 magnetothermal 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.
Once the pump has started, check that the direction of rotation of the electric motor is as indicated by the arrow on the
motor's protective casing; 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 the 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 counter
clockwise 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).
7.3
CONNECTION / SETTING OF THE LEVEL PROBES
7.3.1
CAPACITIVE PROBE
The capacitance level probe has a Namur NO Type Intrinsically safe capacitance sensor:
II 1G EEx ia IIC T6.
It must be connected to the system by a certified isolated intrinsic safety barrier [EEx ia].
Following a secure connection example.
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.
