Start-Up; Stop; Pumping Water Vapor; Maintenance - MIL'S K04 Notice D'utilisation

LUBRICATED VACUUM PUMP K04‐K08‐K12
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 vapor 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 vapor 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.
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.
Pumping water vapor
While operating in the presence of water vapor, the pump takes in a mixture of air and water which enters the pump and
therefore also the oil tank.
The aspirated water vapor is expelled by the heat generated by the pump during operation.
Therefore, if water vapor 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.
6. MAINTENANCE
General warnings
For good maintenance:
• Immediately verify the causes of any malfunctions (excessive noise, overheating, etc.);
• Pay particular attention to safety devices;
• Make use of all documentation provided by the manufacturer (instruction manuals, wiring diagrams, etc.);
• Use only appropriate tools and original spare parts.
In the event of a failure to understand the information or procedures contained in this chapter, contact D.V.P. Vacuum
Technology s.p.a. for clarification before proceeding.
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