11.3. Maintenance
Maintenance intervals
.
After 3 years at the latest for Ex certified products.
Lubricant change
.
In the factory, the gear housing is filled with grease.
.
Grease change is performed during maintenance:
–
Generally after 4 to 6 years for modulating duty.
–
Generally after 6 to 8 years if operated frequently (open-close duty).
–
Generally after 10 to 12 years if operated rarely (open-close duty).
.
No additional lubrication is required during operation.
Notes regarding the maintenance
.
Check actuator visually. Ensure that no outside damage or changes are
visible.
.
The electric connecting cables must be without damage and wired cor-
rectly.
.
Do a thorough touch-up of possible damage to paint finish to prevent
corrosion. Original paint in small quantities can be supplied by AUMA.
.
Cable entries, cable glands, plugs etc. have to be checked for correct
tightness and sealing. Consider torques according to manufacturer’s
details. If required, replace the components. Only use components which
have a test certificate.
.
Check whether Ex connections are fastened correctly.
.
Take care of possible discolouration of the terminals and wires. This
would indicate an increased temperature.
.
For Ex housings, pay special attention to a possible collection of water.
This may originate from “breathing” due to severe temperature variations
(e. g. change of night and day), from damaged seals etc. Remove any
water immediately.
.
Check the flame path gaps of flameproof enclosures for dirt and corro-
sion.
.
Since the dimensions of all flameproof joints are strictly defined and
inspected, no mechanical work (such as grinding) shall be performed on
them. The joint surfaces have to be cleaned chemically (e. g. with
Esso-Varsol).
.
Before fitting, the joint surfaces have to be preserved with an acid-free
corrosion protection agent (e. g. Esso Rust BAN 397).
.
Ensure that all housing covers are handled carefully and that the seals
are checked.
.
All cable and motor protection components have to be checked.
.
If defects which affect the safety are detected during maintenance, repair
measures have to be initiated without delay.
.
Any kind of surface coating for the joint surfaces is not permitted.
.
When exchanging parts, seals etc. only original spare parts shall be
used.
67
Multi-turn actuator SAExC 07.1 – SAExC 16.1/SARExC 07.1 – SARExC 16.1
Non-Intrusive
Operation instructions
with actuator controls AUMATIC ACExC 01.1 Profibus DP
