September 2021
Installation, Operation and Maintenance Manual
VCIOM-01249-EN Rev. 0
93
View Routines
Section 11: Maintenance
The following checks will assure optimum performance:
•
If the stem is external, check that the valve stem is clean and lubricated. If not,
clean it and lubricate it in order to prevent damages to the threaded bush.
•
Lubricate the internal components of the coupling block by means of the spherical
head lubricator using suggested greases (see Section 4, Lubrication).
•
Make sure there are no oil leaks from the actuator housing. The oil level should be
approx. 20 mm from the fill plug (see Section 4, Lubrication).
•
Check the external parts for possible damage and replace them immediately,
if necessary. In case the window glass is broken, the complete cover must be
replaced (see Section 13, Parts list and drawings for individual item numbers).
•
Repaint all areas where paint is missing. In chemically aggressive or saline
environments, remove rust from surfaces and protect with a rust preventative.
•
Check that all nuts and bolts securing the actuator to the valve are tight.
If necessary, re-tighten with a dynamometric key (for tightening torque
values see Section 3.4.3, Installation - Mounting the actuator onto the valve -
Actuator fixing).
•
For severe applications or if actuator operation is infrequent, perform maintenance
checks more often.
•
For actuators provided with lithium batteries, make sure that the display is still
visible when power is off and that there is no “Battery low” warning message.
If “Battery low” warning appears, replace the battery (see Section 11.3
Maintenance - Lithium battery change).
Always replace batteries if the actuator has been subjected to long periods without power
(see Section 12, Troubleshooting).
11.2
Special Maintenance
In case actuator failure, please refer to Section 12, Troubleshooting for possible causes.
Spare parts can be required to Biffi: please refer to the individual item number shown in
Section 13, Parts list and drawings.
NOTICE
Special maintenance is also recommended when, during operations, the actuator
generates an excessive noise.
