Operating and Maintenance Instructions
LB.5WR – LC.25WR – LB.40WR – LB.60WR – LC.105WR
EN
12
www.dvp.it
8702037 – 01/01/2011 – R.0
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 or oil viewer;
•
Close the filler plug and wipe off any spills from the tank.
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
In the event that suction of water vapour is essential, follow the instructions in the subsequent
paragraph (5.1.3 "Pumping water vapour").
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.
WARNING
It is advisable not to start the pump more than 12 times per hour to avoid excessive energy
consumption and damage to the pump, especially for model LC.105WR.
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
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.
Here, due to the effect of the heat produced during operation, the condensed vapour evaporates coming out of the outlet
hole.
For this reason, it is essential, before starting the work cycle, to let the pump reach its running temperature
by operating it for about 30 minutes with the suction inlet closed and isolated from the user system.
Should the
pump stop before all the condensed vapour has been disposed of, it will be deposited on the bottom of the tank,
separating from the oil, after about 8-10 hours. Before restarting, it is possible to check for any water in the tank from the
increase in the oil level through the oil viewer (see chap. 3.3). In this case, follow the instructions in paragraph 6.2.1.
5.1.4
INTAKE FILTER (ONLY LB.5WR)
This version is equipped with a special separator filter which has remarkable advantages:
•
It is fully made of plastic material, which makes it totally rust-proof.
•
The special structure of the filtering cartridge can withhold remarkable amounts of condensate and dust, as filtration
happens progressively from the outside inwards. In this way, optimal filtration is obtained which reaches a value of 30µm.
•
The lower cover of the filter, made of transparent plastic, makes it possible to visually check the state of the
filtering element without having to disassemble it. There is a valve fitted on this to allow the condensate that
forms inside to be discharged.
