Operation; Cleaning; Storage And Conservation; Lubrication Oil Replacement And Monitoring - dreno V2 Serie Manual De Uso Y Mantenimiento

10.2 Operation

WARNING: never run the pump dry/with no load, as this may cause explosion; do not use
the pump with lammable liquids, such as petrol, etc.
With ambient temperatures below zero, the pump does not freeze provided that it is
submerged in a liquid with the following temperature range: 0 to 40 °C. If the electric
pump is removed from the liquid, and therefore exposed to temperatures below zero,
there is a danger that the impeller may freeze. If the impeller is blocked by ice, submerge
the pump in water until the ice has defrosted.
Never use quicker solutions (for example heating it), to avoid damage to the pump.
Do not use the pump for pumping aggressive liquids with a pH outside the speciications.
Never use the pump to pump liquids with solid particles of sizes larger than what indica-
ted in the table of section 5, Technical speciications.

10.3 Cleaning

If the pump has been used with liquids with solid particles, it will be necessary to operate it for a few minutes
with clean water. Impurities (slush, stones, etc.) must be removed to prevent them from blocking the impeller
and the seals when dry, therefore preventing correct operation of the electric pump.
10.4 Pump bleed
When submersing the pump in a well full of water, there is the possibility of formation of an air bubble inside
the pump body, which may prevent perfect pumping performance. In this case, remove the pump from the
liquid, and then submerge it again, repeating the action several times if necessary.

10.5 Storage and conservation

When storing the pump in the warehouse, ensure the following:
Store the pump in a location protected from excessive heat or cold (acceptable interval: 0 to 40 °C)
Store the pump in a vertical position, ensuring correct stability, to prevent it from rolling over and falling.
During this storage period, it is recommended that the impeller or the blade are rotated by hand every now and
then (at least every two months), using safety gloves, to prevent the seals from seizing. Before reusing the pump,
always ensure that the impeller shaft rotates freely.

10.6 Lubrication oil replacement and monitoring

The lubrication oil level check can only be done outside the environments of use of the pump. The oil level
must be below the access hole by 1 to 1.5 cm.
To top up or replace the oil, the pump must be positioned level. The oil check may be done by individuals not
qualiied by Dreno, provided that they are experienced in such operation. An experienced individual is someo -
ne who possesses the right level of competence in the maintenance of electro-mechanical equipment, and an
experience of at least 5 years. If a top-up or a replacement of the oil is required, Q8 WF 15 or similar must be
used. The oil must be replaced at least every 2000 hours.
Make sure that the oil replacement activities do not cause damage to people or the environment, particularly if
the pump has been run with dangerous liquids.
• Slowly rotate the pump, letting all the oil come out from the tank (letting it drip for a few minutes).
• Wash the inside of the tank using washing oil.
• When reilling the oil tank, ensure that the pump is set so that the cap is facing up.
• Fill the tank with para n oil, non-toxic, tasteless, and odourless, like Q8 WF 15.
• Filling is complete when the oil level is 20 mm below the thread of the oil cap. For the exact oil quantity,
see chapter 20.
• Before screwing the cap back on, check its seal, and replace if necessary.
• The pump can now be lowered in the well.
Comply with the current regulations on the disposal of used oils.
The oil must not pollute the pumped liquid (for example drinking water), in line with current regulations.
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