Agromatic ESR-NK Series, Инструкция по установке и эксплуатации, Страница: 84 / 98

8.2 Maintenance work 8 Maintenance and repair
78 Actuators NK and VK, Position Controller ESR-NK
8.2.4 Visual inspection
An initial visual inspection must be carried out 6 months after start-up, after
which the inspection should be repeated at one-year intervals.
The following should be verified:
−
Are the fastening screws between the part-turn actuator and the valve
firmly tightened? Re-tighten screws if required.
−
Are the cable glands, cable entries and filler plugs securely tightened and
leakproof? Re-tighten or replace where required.
−
Are the joining elements between the actuator and the valve (e.g. screw-
type connections, connecting pins) in perfect condition? Re-tighten
screws, replace pins, etc. where required.
8.2.5 Electrical inspection
DANGER
Warning of dangerous electrical voltage!
Working on live electrical devices poses a considerable risk of deadly or
serious injuries!
–
Work on electrical equipment may only be carried out by qualified and
authorized electricians.
–
Before attempting any work, disconnect the machine/system from the
power supply and protect the machine/system against being switched
on for the duration of the work.
–
Adhere to the regulations of the VDE (German Association for Electri-
cal, Electronic and Information Technologies) and to the regulations is-
sued by the local utility company.
−
Have the responsible qualified electrician inspect the electrical equipment
of the actuator for proper condition at least every 4 years and after every
modification or repair.
−
If the electrical equipment and the resources are subjected to increased
stress due to ambient temperatures, dust, humidity, etc., the electrical in-
spection must be carried out at shorter intervals (see also the applicable
guidelines of professional associations for occupational safety and
health).
−
Document the type and time of the inspection carried out in an inspection
log.