Introduction; Safety And Precautions; Tools - ABB LME620AI Service Instruction

2

Introduction

This service instruction refers to
the ABB
LME620AI (with integrated elec-
tronic unit) and LME620AN (for
separate
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
required protective measures.
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
STOP
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).
43/68-13 EN Electrical Linear Actuators for Continuous Modulating Control LME620AI / LME620AN (Contrac)
linear actuators
electronic units). It
persons, take the
cover for
motor (AN)
includes also
electronic unit with
LME620AI
cover for
local control panel
(only LME620AI)
plug
Fig. 1: LME...; main components
thrust
rod
Introduction
integrated
motor
hand
wheel
5