Idiomas disponibles
Idiomas disponibles
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• 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.
6.2 General safety precautions
• Before starting any work on pumps used in liquids which could constitute a hazard to health, carry out thorough cleaning and venting of pump,
tank, etc. according to local regulations;
• 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;
• Always disconnect the phase wires first and then the yellow-green ground wire;
• Ensure that the pump cannot fall or roll, causing injury or damage;
• Wash the surface of the pump thoroughly with clean water and/or specific detergent before doing any work on it.
• After prolonged use, the surface of the pump may become very hot: allow it to cool sufficiently to avoid burns;
• 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 and service
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.
Interval
Weekly
Monthly
Once ever 6 months or 3,000 hours,
whichever comes first
Yearly
Once every 2 years or 9000 hours,
whichever comes first
Once every 2 to 5 years
Standard pump
Measuring the operating current: to be within the rated current.
Measuring the power supply voltage: within ± 5% of the rated voltage.
Inspecting the pump:
• If the pump's performance has diminished significantly, the impeller may be worn or clogged with de-
bris. Remove any debris and replace the part if it is worn
• Inspecting cables: refer to section 6.5.1 "Electric cable inspection"
• Measuring the insulation resistance: Insulation resistance reference value = 20 MΩ minimum
NOTE: The motor must be inspected if the insulation resistance is considerably lower than the last
inspection
Cleaning and inspection of lifting chain or rope:
- Replace if damage, corrosion, or wear has occurred to the chain or rope.
- Remove if foreign object is attaching to it.
Check winches, hooks and chains for signs of failure or wear and corrosion. Clean or lubricate them if
necessary and replace any damaged components. Remove if foreign object is attaching to it.
Verify that the bolts, nuts and screws are properly tightened. When tigthening, renew the threadlocker
if necessary.
Check the fasteners on the bottom every time the tank is empty.
Inspecting cable, oil, mechanical seals, bearings,
wearing parts (impeller, suction flange....).
If the oil contains water, inspect mechanical seal.
Refer to section 6.5.3 "Oil inspection and changing
procedure".
NOTE: rubber parts need to be replaced if disas-
sembled during inspection
Changing oil
NOTE: Refer to section 6.5.3 "Oil inspection and changing procedure".
Changing the mechanical seals
NOTE: The inspection and replacement of the mechanical seals requires specialized equipment. To
have this operation performed, contact the dealer where this equipment was purchased, or the Zenit
sales office in your area.
Overhaul:
The pump must be overhauled even if appears normal during operation. Especially, the pump may need
to be overhauled earlier if it is used continuously.
Safety, Installation and Operations Manual - Original instructions
Inspection Item
-Ex pump
Inspecting cable, oil, mechanical seals, bearings,
wearing parts (impeller, suction flange....):
If the oil contains water, inspect mechanical seal.
Refer to section 6.5.3 "Oil inspection and changing
procedure".
NOTE: rubber parts need to be replaced if disas-
sembled during inspection
Changing bearings
EN
37
