Zenit UNIQA Serie Manual De Instalacion Y Uso página 39

better together
4. INSTALLATION
4.1 General safety precautions
Observe all safety regulations at the installation site. Fence off the working area by appropriate means and wear personal protection equipment.
Make sure that there is sufficient ventilation at the installation site.
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.
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.
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 (See Point 5.4). Any additional components installed in the hazardous area must be connected to the earthing network
according to the EN 1127-1 rule.
Check the suitability for use in potentially explosive atmospheres of each additional component installed in the hazardous area.
caution
Prior to installation, make sure the tank bottom is even.
caution
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.
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 (See Point 5.4);
Prior to installation, check the oil level in the mechanical seals oil chamber.
Check the electric cable and gaskets for damage and make sure that the impeller turns freely.
4.2 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.
caution
NEVER handle the product by means of the power supply or signalling wiring.
Make sure that the atmosphere in the working area is not potentially explosive.
4.3 Electrical cables protections
The ends of the electrical cables are protected with a heat-shrink sheath that stops liquids or humidity from getting in.
This protection does not ensure a water-tight seal and is only able to preserve the cable from water spray or similar (IP44).
Accordingly, do not immerse the ends of the cables in any sort of liquid, not even with the protections on, and only take the sheath off immediately
before setting up the electrical connection to the electric pump.
If the storage location is subject to flooding, be careful to set the ends of the cable up at a higher level than the maximum possible flooding level.
Follow the instructions below to remove the heat-shrink sheath (Fig. 5):
1. cut across the end of the heat-shrink sheath;
2. make a lengthwise cut in the heat-shrink sheath, taking care not to damage the wires inside;
3. open the flaps of the sheath to expose the wires, and slide the sheath off the cable.
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Safety, Installation and Operations Manual – Translation of original instructions
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