Zenit UNIQA Serie Manual De Instalacion Y Uso página 47

better together
6. COMMISSIONING
6.1 General safety precautions
All operations must be carried out by skilled technical staff. Keep objects and people at a safe distance from the machines instal-
led and do not allow people or animals to come into contact with the liquid in which they are immersed.
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.
Before connecting the pump to the power supply panel:
•
Check the level and the condition of the oil in oil chamber
•
Check that the impeller can turn freely
•
Check that the impeller turns in the correct direction (See Point 4.4)
6.2 Starting the pump
The pump must not be started if the atmosphere in the tank is potentially explosive.
Once installation is complete, the system should be tested to ensure that it is fully operational.
The pump must always be used with the safety devices installed and in good working order; make sure that all protective equipment has been
connected correctly.
Check that the required gate valves (where fitted) are open.
Switch on the power supply and let the pump run briefly and:
•
Make sure that the pump does not operate off its characteristic curve
•
check that the input current is within the limit stated on the nameplate
•
check whether the monitoring units are operating satisfactorily (no alarms or warnings)
•
check the setting of the level control system (minimum and maximum levels)
caution
The maximum permitted number of starts per hour must be complied with to prevent damage to the motor (see Point 1.13).
In case of abnormal noise or vibration from the pump, other pump failure, alarms or warnings, stop the pump immediately and
do not restart it until the cause of the anomalies are found and fixed.
6.3 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.
Use hearing protection when working near a pump in operation with a sound pressure level above 70 dB(A).
7. MAINTENANCE AND SERVICE
7.1 Introduction
Regular maintenance and inspections are indispensable to maintaining the pump's performance. For this reason, the complete unit should be
cleaned thoroughly on a regular basis, maintained and inspected.
If the pump behaves differently from its normal operating condition, refer to section "9. Troubleshooting guide" of this manual and take appropriate
measures at an early stage.
Do not use the pump if malfunctioning because sudden failure of the rotating parts may cause hazardous situations or damage
to the motor.
Do not open the product while it is energized or in an explosive gas atmosphere.
caution
The instructions for inspection and maintenance of these pumps must never be viewed as "Do-It-Yourself" procedures;
they require specific technical knowledge.The inspection and replacement of spare parts require specialized equipment. To have this
operation performed, contact the dealer where this equipment was purchased, or the ZENIT sales office in your area.
Inspection and repairs of -Ex equipments shall be carried out in accordance with:
•
EN 60079-17: Explosive atmospheres - Part 17: Electrical installations inspection and maintenance
•
IEC 60034-23: Rotating electrical machines – Part 23: Repair, overhaul and reclamation
•
EN 60079-19: Explosive atmospheres - Part 19: Equipment repair, overhaul and reclamation
Any interventions of the pump in -Ex versions must be carried out by an Ex-Certified Service Centre (according with interna-
tional and/or local standards and rules) or by a Zenit Service Centre by trained technicians using only original spare parts. Failure
to comply with this rule causes loss of -Ex approval.
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.
Safety, Installation and Operations Manual – Translation of original instructions
EN
47