Operating Instructions; Operation; Filling The Oil Tank; Start-Up - DVP LC.2 Instrucciones De Funcionamiento Y Mantenimiento

5

OPERATING INSTRUCTIONS

5.1

OPERATION

Checks to be performed before start-up:
• The pump is supplied without any oil in it. Use the supplied oil or an oil lubricant indicated on the identification
plate of this pump (see ch. 3.3) or, alternatively, an alternative lubricant of another brand but with similar
characteristics;
• Make sure the pump outlet is not obstructed by fittings.
WARNING
A quantity of oil that exceeds the necessary quantity may cause the clogging of oil separators and
damage to the pump or to the electric motor.
Operation without lubricant causes serious damage to the pump.
5.1.1

FILLING THE OIL TANK

WARNING
When filling the oil tank never exceed allowed maximum level.
• Undo the oil filler plug;
• Pour oil in the tank up to mid-range of the oil sight glass;
• Close the filler plug
• Remove all oil spills from the pump and/or floor.
5.1.2

START-UP

HAZARD
The pump may reach high temperatures when operating.
After start-up, the pump may run slower than the regular rpm if room temperature is lower than allowed as seen on
the technical data table. It may also run lower if the oil is contaminated or the supply voltage is lower than the
required voltage as indicated on the motor rating plate.
If nominal rpm is not reached within a few seconds, the thermal switch fitted to protect the pump must trip
(installation required in paragraph "Wiring").
WARNING
If water vapour should be taken in, take the pump to a steady temperature by leaving it to run for
approximately 30 minutes with the suction inlet closed and the system containing the water
vapour isolated before starting the work cycle.
WARNING
Make sure the pump is working at the allowed pressure value and do not leave the pump running
for a long time with the suction inlet completely open.
HAZARD
Full r.pm. pump operation must be without vibration or unusual noise. If these are present, stop
the pump immediately, search for the cause and eliminate it.
5.1.3

STOP

The pump must be stopped by cutting off the power supply.
If the pump is to be powered off, let it run with closed intake for about 30 minutes first.
This will eliminate any moisture inside the intake chamber and avoid rotor oxidation.
In the case of long machine downtime, completely empty the pump to avoid hazards of frost during cold weather or
corrosion due to possible chemical alteration of the stagnant liquid in the pump.
5.1.4

PUMPING WATER VAPOUR

While operating in the presence of water vapour, the pump takes in a mixture of air and water which enters the
pump and therefore also the oil tank.
The aspirated water vapour is expelled by the heat generated by the pump during operation. On models LB.5,
LC.12 and LC.20 there is an integrated regulating ballast which ensures the constant flow of ambient air from the
pumping room, allowing the expulsion of aspirated water vapour before it condenses into the lubricating oil.
Therefore, if water vapour is present, it is essential that before the work cycle is started the pump must
reach its operating temperature – this is achieved by running it for about 30 minutes with the suction inlet
closed and isolating it from the user system.
8702036 – 12/04/2016 – R.7
Operating and Maintenance Instructions
LC.2 – LC.4 – LB.5 – LB.6 – LB.8 – LC.12 – LC.20
14
EN
www.dvp.it