Acoustic Pressure Level; Maintenance And Service; Introduction; General Safety Precautions - Zenit Grey Serie Manual De Primera Instalación

First installation manual – Translation of original instructions
warning!
The maximum permitted number of starts per hour must be complied with to prevent damage to the motor.
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.

4.3 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.

5. MAINTENANCE AND SERVICE

5.1 Introduction

Zenit 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.
EN
warning!
The instructions for inspection and maintenance of these pumps must never be viewed as "Do-It-Yourself" procedures;
they require specific technical knowledge.
NOTE: 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.
Any interventions of the pump in -Ex versions must be carried out by an Ex-Certified Service Centre (according with international
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.

5.2 General safety precautions

• Take the precautions detailed in the "Safety Precautions" manual.
• 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.

5.3 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.
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 -Ex certification, schedule a maintenance plan with a maximum interval of 2 year or 9,000 hours con-
tinuous opeation (which ever comes first) 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 adverse or incorrect installation conditions can lead to explosion risk.
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.

5.4 Inspection

5.4.1 Bearings inspection

All bearing are rolling element type grease lubricated for life. Check the shaft noisy or heavy operation (turn the shaft by hand) and in case, replace
the defective ball bearings.
Defective bearings may reduce the -Ex safety.

5.4.2 Mechanical seals inspection

When the pump is new or after mechanical seals replacement, check the oil level. Oil change and mechanical seals inspection is necessary if the
leakage probe detects an ingress of water into the seal chamber.
Oil chamber is designed in order than, filling it with the pump in vertical position, the right quantity of the lubricate is reached when its level reach
the hole for the filling (oil plug).
Use CASTROL PRODUCT L320 oil or similar.

5.4.3 Cable inspection

Make sure that the electrical cables aren't sharply bent and/or pinched or damaged in any way.
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Grey
better together