Intended Use; Safety Information; Due Care Required By The Operator; Special Hazards - GF EA 21 Bedienungsanleitung

Modifications to the actuator which have an effect on the technical data
given in this instruction manual and its intended use, i.e. significantly alter
the actuator, render this manufacturer's declaration null and void.

3. Intended use

When mounted on a valve and connected to a system control and provided
that the actuator data corresponds to the electrical control and the valve,
the purpose of this actuator is:
• to actuate valves with up to 180° pivoting (ball valves and butterfly
valves),
• to indicate the previously calibrated end positions of the valve via elec-
trical signal to the system control (accessory), and
• in case of a power supply interruption the actuator valve remains in its
current position (without accessory). Please use emergency manual
override or install fail-safe return.
The actuator is not intended for uses other than those listed above. If the
instructions contained in this manual are not observed, the manufacturer is
excluded from all liability for the above mentioned products.

4. Safety Information

4.1 Due care required by the operator

The actuator described herein was designed and manufactured with consi-
deration to the respective harmonized European standards. It corresponds
to the latest technology and the technical specifications contained under
section 6.3.
Safety on the job can, however, only be realized if the operator warrants that
• the actuator is only used as indicated under section 3,
• he is familiar with this instruction manual and the manual of the corres-
ponding valve and adheres to the instructions contained therein and
• he has taken the necessary measures against electrostatic influence.
24 V devices may only be connected to voltages which fulfill the require-
ments of a safety extra low voltage circuit (SELV).

4.2 Special hazards

Under normal conditions, the actuator may only be operated with the
cover closed.
If work is performed on the actuator with the cover removed, the supply
and control voltage must first be disconnected. Adjustments, which need
to be done in the energized state, should be carried out with special insu-
lated tools.
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