February 2019
User Instructions
MAN-02-04-60-0350-EN Rev. 3
67
Section 11: Maintenance
Maintenance
Section 11: Maintenance
Maintenance work on open actuators may only be conducted if these are de-energized.
Reconnection during maintenance is strictly prohibited.
NOTE:
Work on the electrical system or equipment must be carried out only in accordance with
electrical regulations by a qualied electrician himself or by specially instructed personnel
under the control and supervision of a qualied electrician.
CAUTION
For explosion-proof actuators, it is necessary before opening the cover to wait a certain
time after switching off,see explosion protection sticker on the side of the actuator.
• CL05: 5 min
• CL05: 10 min
• CL-25: 15 min
Actuators are ready for use after installation. By default, the actuator is delivered lled with
oil. On-going monitoring:
— Beware of increased running noise. During long downtime periods,
operate the actuator at least every 3 months.
— For actuators with output types A, B and C according to DIN 3210-A, B1,
B2 and C according to DIN ISO 5210, re-lubricate at least every 6 months
on existing grease ttings (see Section 15.2)
Pay attention to increased running noises, occur on them, grease the two lubrication
nipples of the linear unit to lubricate the bearings and the spindle guidance.
Check the clearance between the spindle and the spindle nut by pulling on the spindle with
the spindle nut xed. If a clear movement is possible, the ring nut may have loosened or the
spindle nut has worn out. If spindle nut is worn, replacement is recommended.
Regularly check the mounting screws between the actuator, the linear unit and the
valve for rm hold. If necessary tighten bolts to torques specied in chapter "Installation
instuctions" of the standard user manual.
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