Introduction
43/68-13 EN
Electrical Linear Actuators for Continuous Modulating Control LME620AI / LME620AN (Contrac)
5
2
Introduction
This service instruction refers to
the ABB linear actuators
LME620AI (with integrated elec-
tronic unit) and LME620AN (for
separate electronic units). It
amends and deepens the routine
maintenance description in the
standard instruction, which we
strongly recommend to be also
available for all maintenance work.
2.1
Safety and precautions
When mounting the actuator in ar-
eas which may be accessed by un-
authorized persons, take the
required protective measures.
STOP
STOP
- The actuators perform movements for positioning vanes and valves. Handle properly and with care.
Otherwise, a hazard of bruise injuries may arise.
- Only qualified specialists who have been trained, qualified and certified by ABB for these tasks are
authorized to mount and adjust the actuator and to make the electrical connection. ABB will not take
any responsibility for personal injuries or material damages which were caused by non-trained, non-
qualified or non-certified personnel.
- When working on the actuator itself or the electronics always observe the locally valid accident pre-
vention regulations and the regulations concerning the construction of technical installations.
- Do not lift or lower the actuator when it is mounted on a valve or similar final control element.
- Switch-off the voltage supply; make sure that unintentional switching on is not possible
- Make sure that switching off the power supply does not affect the plant process
- Make sure that the final control element is not exposed to process forces.
- Check all mechanical and electrical interfaces for proper connection once the installation, commis-
sioning, service or maintenance work is done.
2.2
Tools
IMPORTANT Maintenance at CONTRAC actuators requires tools which are usually available in a workshop. Please
consider that all dimensions are based on the metrical system. This applies also for the wrench sizes,
threads etc. Using improper tools may damage the actuator or its components.
Use appropriate sleeves for the installation of the sealing rings (see chpt. 5.2.2.2 for details).
hand
wheel
cover for
thrust
motor (AN)
includes also
plug
Fig. 1:
LME...; main components
rod
integrated
motor
cover for
local control panel
(only LME620AI)
LME620AI
electronic unit with
