11
water solutions
First installation manual – Translation of original instructions
Fig. 13
3.1 General safety precautions
•
All the procedures involved in connecting the unit to the electrical mains must be carried out by skilled staff in accordance with the relevant legal
requirements: incorrect electrical connections may cause fires and an electrocution hazard, or the risk of damage to the product.
•
Check that the unused conductors are properly insulated and fixed in the electrical panel.
•
Before installation, make sure that the power supply line voltage and frequency are as stated on the nameplate and that the power absorption
of the pump is below the maximum current the system is able to deliver.
•
The maximum voltage variation allowed for rated value is ± 5%
•
Voltage imbalance between phases: max 2%
•
The fuses and protective cut-outs must be of suitable rating for the system’s characteristics.
•
Protect the pump motor using an overload cut-out suitable for the electrical data provided on the nameplate.
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Make sure that the thermal protection devices are properly connected: apart from leading to forfeiture of warranty cover, failure to connect the
thermal protection may constitute a hazard.
•
The electrical operation and safety of ZENIT electric pumps are guaranteed for the configuration supplied by the manufacturer: any changes
(e.g. addition of extra lengths of cable to the original power lead) may cause a deterioration in the pump’s characteristics.
Before installation and the first startup, make sure that the electrical cables are not damaged in any way to avoid short circuit.
3.2 Wiring
•
Make sure that the electrical cables have not be exposed to damp and/or immersed in water.
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The cable’s free terminals must be connected to a control panel with a degree of insulation suitable for the installation environment.
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Secure the electric cables so that they cannot be twisted, torn and/or crushed.
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If the cable is damaged, do not replace it; contact Zenit or an Authorised Service Centre.
•
Do not underestimate the problems caused by voltage drops.
The ends of the power supply cable must be connected to an electric panel certified for use in potentially explosive atmospheres
if it is installed in a hazardous area
3. ELECTRICAL CONNECTIONS
EN
L>5D
D
1
2
3
4
5
