20
12 Maintenance
Introduction
Never perform maintenance and control operations with wet body parts. Wear the accident prevention equipment provided for by the regulations in
force.
Inspection and maintenance must always be carried out with the strainer stopped and without pressure. All operations must be performed by skilled
personnel authorized by the manufacturer to avoid damage to the internal parts. Failure to comply with these rules relieves the manufacturer of causes
for damage to persons and property and causes the loss of the warranty for damage to internal parts.
CLEARLY INDICATE THAT THE STRAINER IS IN MAINTENANCE APPLYING AN APPROPRIATE INDICATIONN SIGN.
Periodic checks
It is recommended to perform a preventive check of the strainer working status to avoid irreparable damage. It is recommended to perform a check
at least every 12 months.
To check the correct operation of all the strainer components it is necessary to carry out some periodic checks such as:
-
Alarms history check
Note down the alarms that have occurred since the last check and carry out an analysis of the possible causes that triggered them.
-
Anomalies history check
Note down the anomalies that have occurred since the last check and make an analysis of the possible causes that triggered them.
-
Check that there are no leaks from the device
Check that there are no leaks from the device and from the drain valve.
- Check the correct operation of the controller and of the device elements
After having shut-off the inlet and the drain, check the operation of the various parts by means of manual forcing.
Check the actuators and the motor and the sensors pressure reading.
-
Cables visual check
Check that the electric supply cable and the other cables do not show signs of degradation of the insulating sheath (hardening/cuts or tears).
-
Check the earthing
Perform a visual check of the earth cable and the device earthing quality according to the regulations in force.
Minimum frequency: yearly or according to current legislation if more frequent.
- Verification of protection devices and electrical part command
Check the protection circuit breakers installed upstream of the device. Check the electric supply cut-off devices.
Minimum frequency: yearly or according to current legislation if more frequent.
- Installation check
Check the solidity and validity of the installation. Check that there are no signs of corrosion on the legs of the device and on the fixing bolts to the
ground.
- General check
Perform a general visual check of the device.
- Automatic air vent strainer cleaning
To carry out the periodic cleaning of the strainer on the automatic air vent valve, check that the strainer
is not pressurized, access the strainer unscrewing the 2 1/2” cap using the appropriate key. Clean the
strainer washing it under running water. Refit the strainer checking the status of the O-ring and replace
it if necessary. Tighten the nut checking for leakage or seepage.
Extraordinary maintenance
Carrying out regular periodic checks, no other type of intervention is required for extraordinary maintenance except in cases of damage due to external
causes or incorrect installations.
Record every intervention carried out on the "INTERVENTION TABLE".
