Operating and Maintenance Instructions
EN
LC 25 – LC 40 – LC 60 – LC 106 – LC 106 Kzero – LC 151 – LC 151 Kzero – LC 205 – LC 305 – LC 205HV – LC 305HV – RC 50M
15
8702035 – 01/04/2018 – R.10 www.dvp.it
4.9 CONNECTION
HAZARD
Pump connections should be performed by skilled and trained personnel only.
4.9.1 INTAKE AND OUTLET CONNECTIONS
User system connections (both intake and outlet) must be performed with pipes with a diameter equal to or greater
than the pump suction inlet. The weight of pipes or any expansions must not burden the pump.
It is advisable to make the final connection to the pump using flexible pipe or fittings. It is important to tighten all
pipes and couplings. Very long pipes or pipes with a diameter that is too small diminish pump performance.
HAZARD
Make sure that discharged gases are let out of the workplace.
WARNING
Always install an intake filter, especially if the pump is to work with air that might contain foreign
matters.
Pump outlet gases must be treated in such a way that they do not contaminate the working environment and the
surrounding atmosphere. If condensable vapours are pumped in, the discharge hose should be routed downwards
and have no bends to prevent the condensate produced in the discharge line from building up or flowing back into
the pump.
Never use friction hoses with hose diameters smaller than the intake diameter. Avoid exceeding hose lengths, tight
bends or bends spaced too closely together.
WARNING
Do not insert outlet fitting pipes or devices that block or impede the disposal of outlet gases (max
overpressure exhaust 0.3 bar).
4.9.2 WIRING
WARNING
Check that network voltage and frequency correspond to values contained on the motor rating
plate.
The connection cable must be adequate for the power absorbed by the pump (absorption values are shown on the
pump motor rating plate) taking into account the environmental conditions of operation.
HAZARD
Always ground the pump.
Always install a security system between the pump and the electric power supply. Pump absorption values are
shown on the motor rating plate.
The pump is normally supplied without an electrical cable and switch. For electrical connection, see the diagram
contained within the terminal board or on the motor rating plate.
WARNING
Check that the direction of rotation is correct before starting the pump for the first time or after
changing the electrical connections.
The correct direction of rotation is indicated by the arrow on the pump (see ch. 3.3). Pump
operation with a rotation direction that is opposite to that indicated can severely damage the
pump itself.
4.9.3 ELECTRICAL OIL LEVEL GAUGE (OPTIONAL)
If installed, the electrical oil level gauge signals when level inside the tank descends below minimum level.
Oil level gauge characteristics are as follows:
• VOLTAGE SWITCHING: Max 250Vdc & Vac
• CURRENT SWITCHING: Max 0.5 Adc / Max 0.7 Aac
• CONTACT RATING: Max 50VA
WARNING
The signal from this device may NOT be used to directly drive the motor.
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