7
water solutions
First installation manual – Translation of original instructions
2. TRANSPORT AND INSTALLATION
2.1 Visual inspection
Make a visual inspection of the packaging for damage. Record any significant damage to the product in the transport documents.
If articles are missing, contact Zenit (or its dealer) or the forwarders.
Remove the packaging materials and dispose of them as required by law. Take special care not to injure yourself with sharp tools and not to da-
mage to the product, especially the electrical wiring.
Inspect the product to ensure that there are no damaged or missing parts.
Check that the data on the nameplate are the same as those of the product required.
2.2 General safety precautions
•
Fence off the working area by appropriate means and wear personal protection equipment.
•
Before carrying out any operation, make sure that the pump and electrical panel are disconnected from the electrical mains and cannot be
accidentally powered up.
•
Check the electric cable and gaskets for damage and make sure that the impeller turns freely.
•
The size of the tank in which the pump is installed must be such that:
- any level float switches are able to move freely;
- the number of pump switch on/switch off cycles does not exceed the permitted number stated in the technical information;
•
The pump must be lowered into the tank using a sling or chain of suitable size tied to the handle.
•
Prior to installation, make sure the tank bottom is even.
•
To prevent the cavitation problems caused if the pump draws in air, ensure that the liquids do not flow into the tank near to or towards the pump.
•
Make sure that the pump does not operate off its characteristic curve.
•
Bolts used for replacement must be Class A2-70 or better according to EN ISO 3506-1
Make sure that the atmosphere in the working area is not potentially explosive.
Persons must not enter the installation area when the atmosphere is explosive.
The classification of the installation site must be approved by the local fire-fighting autorities in each individual case.
Grey submersible pumps shall be installed in vertical operating position.
The user must ensure that the -Ex pump operates always submerged. The minimum level of pumped liquid must be controlled
by two level sensors (in redondancy) to shut down the power supply when the liquid to be pumped belows the minimum level
(pump fully submerged).
The electric pump is equipped with thermal protectors inside the stator windings to shut down the power supply in case of
overheating. It is mandatory that the user connect thermal protectors with a control panel set in a way to avoid the automatic
restart of the submersible pump. The pump shall be exclusively restarted manually by a technician after having fixed the cau
-
ses of the anomaly.
The shock from built up electrostatic charges on isolated components could cause an explosion. -Ex pumps do not have isolated
components that are electrostatically chargeable and they are all equipped with screw for connection to the equipotential ground
network. Any additional components installed in the hazardous area must be connected to the earthing network according to the
EN 1127-1 rule, part 6.4.7.
Check the suitability for use in potentially explosive atmospheres of each additional component installed in the
hazardous area.
Prior to installation, check the oil level in the mechanical seals oil chamber.
2.3 Handling and lifting
The pump must be lifted and handled using a chain or sling secured to the handle on top, with suitable machinery (crane, hoist,
etc.).
Before lifting, make a note of the weight of the product stated on the nameplate and use certified slings, chains and hooks of
suitable load capacity.
Ensure that the electric pump is firmly secured and cannot fall, rotate or swing.
The handle on top is designed to ensure that the pump will be balanced during lifting; however, it may swing when lifted off the
ground
(Fig. 4)
.
Do not stand close to the pump during handling.
Always wear personal protection equipment.
warning
!
NEVER handle the product by means of the power supply or signalling wiring.
2.4 Checking the impeller rotation direction
Before making the definitive electrical connection, a skilled technician must make sure the impeller rotation direction is correct.
The three-phase pump carries a decal which indicates the correct impeller rotation direction (green arrow) and the relative kickback direction (red
arrow) when the pump is viewed from above
(Fig. 2)
.
All of the following operations must be carried out in safety area, in absence of potentially explosive atmospheres.
Fig. 4
EN
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