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ENGLISH
8. Inspection and maintenance
For your personal safety during a simple inspection
Before work on the pump, check the power supply is disconnected and the pump can not restart, not even
accidentally. For personal cleanliness, be sure the pump has been carefully cleaned with water or speciied
products. If the pump is disassembled it is necessary to use working gloves.
Recommended advices
Periodical controls and maintenances are suggested to guarantee a safer future operating. If the pump is new
or if the mechanical seals have been replaced, an inspection is recommended after the irst week of working.
The pump must be inspected after 2000 hours of working or at least once a year. Hard working conditions or
occasional use require necessary frequent controls. A general check must be done on the following points:
• Check there are no iniltrations coming from the cable (in this case replace the cable gland, making sure that
screws and bush are perfectly closed).
• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualiied
persons in order to avoid any hazard.
• For the all the series with oil chamber, check the level and quantity of oil in the chamber (the charge of oil is
complete when its level, with the pump laid on one side is of 1 -1,5 cm under the hole for the oil cap).
Motor insulation control
Once a year at least or after 4000 hours of working, check the insulation of the motor.
The measurement must be executed at the cable extremities (switch of from the panel) using a megohmmeter.
The test tension is 1000V maximum in continuous tension.
The resistence of the winding towards the earth must be higher than 5 M
Ω
, otherwise it is neccessary to execute
two measurements, one for the cable and the other for the motor.
Take of the cable from the motor and execute the measurements of the winding towards the earth, connecting
all the extremities of the winding.
• If the value of insulation of the cable is lower than 5 M
Ω
, it means the cable is damaged.
• If the motor has low insulation values, this means the winding is brokedown.
9. Spare Part List
The spareparts list and related purchases, are available on-line at
Dreno Part Selector
though our web site
www.drenopompe.it,
or contact us at
.
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