Samson 3767, Перевод оригинальной инструкции

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5-18 EB 8355-2 EN
Installation
5.4 Pneumatic connection
Risk of injury by possible movement of the
actuator stem after connecting the signal
pressure.
Î
Do not touch or block the actuator stem.
The pneumatic connections are optionally
designed as a bore with ¼ NPT or G ¼
thread. Customary fittings for metal or cop
-
per tubing or plastic hoses can be used.
Risk of malfunction due to failure to comply
with air quality requirements.
Î
Only use supply air that is dry and free
of oil and dust.
Î
Read the maintenance instructions for
upstream pressure reducing stations.
Î
Blow through all air pipes and hoses
thoroughly before connecting them.
If the positioner is attached directly to the
Type 3277 Actuator, the connection of the
positioner's output pressure to the actuator is
fixed. For attachment according to
IEC 60534-6 (NAMUR), the signal pressure
can be routed to either the top or bottom di-
aphragm chamber of the actuator, depend-
ing on the actuator's fail-safe action "actua-
tor stem extends" or "actuator stem retracts".
Exhaust air
Models with index 3767-x...x .03 and higher
are equipped with a hinged cover without its
own exhaust air port. The exhaust air con-
nections for these models are included in the
accessories.
The vent plug is located on the plastic cover
of the actuator for direct attachment, where-
as for NAMUR attachment, it is located on
the adapter housing. The vent plug is located
on the intermediate piece or reversing ampli-
fier for attachment to rotary actuators.
If you intend to replace older models with in-
dex 3767-x...x.02 or lower, the mounting
parts may need to be replaced as well.
5.4.1 Pressure gauges
To precisely tune the positioner, we recom-
mend installing pressure gauges for the sup-
ply air and signal pressure.
The required parts are listed as accessories
in section 5.8.
5.4.2 Supply pressure
The required supply air pressure depends on
the bench range and the actuator's operat-
ing direction (fail-safe action).
The bench range is written on the nameplate
either as the bench range or signal pressure
range. The operating direction is marked
FA
or FE or by a symbol.
WARNING !
NOTICE
!
Note