Zenit UNIQA M08L, First Installation Manual

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First installation manual – Translation of original instructions
5. COMMISSIONING
5.1 General safety precautions
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All operations must be carried out by skilled technical staff.
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The pump must always be used with the safety devices installed and in good working order.
•
Keep objects and people at a safe distance from the machines installed and do not allow people or animals to come into contact with the liquid
in which they are immersed.
•
Before connecting the pump to the power supply panel, check that the impeller can turn freely.
•
Check that the impeller turns in the correct direction using the procedure described in point 3.2 “Checking the impeller rotation direction”.
5.2 Starting the electric pump
Once installation is complete, the system should be tested to ensure that it is fully operational.
Use an ammeter to check that the power absorption of the pumps installed is within the limit stated on the nameplate.
warning
!
The maximum permitted number of starts per hour is stated in the technical information and must be complied with to
prevent damage to the motor.
5.3 Acoustic pressure level
The pump’s acoustic pressure level when in operation is below 70 dB.
However, in some systems and in some duty points on the performance curve this threshold may be exceeded.
Check the permitted acoustic pressure level in the environment where the product is installed to avoid breaching local legal requirements.
6. MAINTENANCE
6.1 Introduction
Zenit UNIQA electric submersible pumps undergo through final inspection before they are offered for sale and installed.
The product’s reliability derives from the use of top quality components but also depends on regular inspections which must be carried out by the
user.
warning
!
The instructions for inspection and maintenance of these pumps must never be viewed as “DIY” procedures; they require
specific technical knowledge.
Any interventions of the pump in -EX versions must be carried out by an authorised Service Centre or by authorised technicians
using only original spare parts.
Failure to comply with this rule may cause loss of warranty rights and put the pump’s safety at risk. A service and planned maintenance contract
with the Zenit Authorised Service Centre guarantees the best technical service. The Zenit warranty is only valid if repairs and reactive maintenance
are performed by an Authorised Service Centre.
6.2 General safety precautions
•
Take the precautions detailed in the “Safety Precautions” manual.
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Before cleaning and/or maintenance procedures, a skilled technician must disconnect the pump from the power supply and ensure that it
cannot start up accidentally.
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Always disconnect the phase wires first and then the yellow-green ground wire.
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Ensure that the pump cannot fall or roll, causing injury or damage.
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Wash the surface of the pump thoroughly with clean water and/or specific detergent before doing any work on it.
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After prolonged use, the surface of the pump may become very hot: allow it to cool sufficiently to avoid burns.
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Always comply with the safety regulations in force in the place of installation, any local regulations and the dictates of common sense.
6.3 Planned maintenance
Maintenance intervals depend on the type of installation, the workload to which the pump is subjected and the type of liquid in which it is immersed.
During planned maintenance or in any circumstances when the pump’s performance deteriorates or its vibrations and noise level increase, the
parts subject to wear and tear must be inspected; have this done by an Authorised Service Centre.
Do not use the pump if malfunctioning because sudden failure of the rotating parts may cause hazardous situations or damage to the motor.
If the hydraulic part is fouled, clean it thoroughly.
For machines subject to ATEX certification, Zenit recommends a scheduled maintenance plan with a maximum 2-year interval
for electric pump re-conditioning, which includes changing the bearings and the mechanical seals. A six-month control is also
recommended to check the wear of the bearings, the mechanical seals and all other parts subject to wear, as particularly adver-
se or incorrect installation conditions can affect the duration of the service life of all machine parts.
6.3.1 Spare Parts
Requests and/or orders of spare parts used only in explosion-proof ATEX certified pumps will be declined by Zenit as any revision and /or repairs
of these models can only be carried out by Zenit or by an authorised Service Centre.
6.3.2 Cleaning
If the pump is used only occasionally, after each use flush out the hydraulic part to prevent the formation of deposits; run the pump for a few cycles
with clean water.
Also take care not to allow sediments to form on the float switches, to ensure that the start and stop thresholds remain correct.
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