Samson 3969, Mounting And Operating Instructions

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32 EB 3969 EN
Mounting and start-up
5.2 Exhaust air feedback for
single-acting actuators
The instrument air leaving the solenoid valve
is diverted to the actuator spring chamber to
provide corrosion protection inside the actu-
ator.
5.2.1 Direct attachment
according to VDI/
VDE 3847
Direction of action: actuator stem extends
Remove the blanking plug in the vent con-
nection at the connection block and make a
pneumatic connection to the spring chamber
on the vented side.
The corresponding pipe fittings to establish
the air connections are listed in section 3.1.
Direction of action: actuator stem retracts
The exhaust air feedback is automatically
provided.
5.2.2 Rotary actuators
according to VDI/
VDE 3845
The exhaust air feedback is automatically
provided. Should other valve accessories be
used which vent the actuator (e.g. positioner
etc.), the exhaust air of this device can also
be included in the exhaust air feedback over
port 3 of the adapter plate as part of the
configuration of the external connecting
plate (see section 3.1). A separate venting is
not required since the air is vented through
the solenoid valve cover.
5.2.3 Attachment according to
IEC 60534-6
1. Mount the solenoid valve as described in
section 5.1.3.
2. Connect port 3 to the actuator's spring
chamber.
Should other valve accessories be used
which vent the actuator (e.g. positioner etc.),
the exhaust air of this device can also be in-
cluded in the pipe hook-up. A separate vent-
ing is not required since the air is vented
through the solenoid valve cover.
5.3 Pneumatic connections
Risk of injury by possible movement of ex -
posed parts (actuator or valve) after connect -
ing the pilot supply.
Do not touch or block exposed moving parts.
5.3.1 Connecting the supply
air
Risk of malfunction due to incorrect sequence
of mounting, installation and start-up.
Observe the following sequence.
1. Remove the protective caps from the
pneumatic connections.
Tip
WARNING !
NOTICE
!