10.
Setting the DUO limit switching (option)
Any application can be switched on or off via the two intermediate position
switches.
For setting, the switching point (intermediate position) must
be approached from the same direction as afterwards in
electrical operation.
10.1 Setting direction CLOSE (black section)
.
Move valve to desired intermediate position.
.
Press down
and turn setting spindle G (figure K-2) with screw driver
in direction of arrow, thereby observe pointer H.
While a ratchet click is felt and heard, the pointer H moves 90° every time.
When pointer H is 90° from mark C, continue turning slowly. When pointer
H has reached the mark C, stop turning and release setting spindle. If you
override the tripping point inadvertently (ratchet click is heard after the
pointer has snapped), continue turning the setting spindle in the same
direction and repeat setting process.
10.2 Setting direction OPEN (white section)
.
Move valve to desired intermediate position.
.
Press down
and turn setting spindle K (figure K-2) with screw driver
in direction of arrow, thereby observe pointer L.
While a ratchet click is felt and heard, the pointer L moves 90° every time.
When pointer L is 90° from mark F, continue turning slowly. When pointer L
has reached the mark F, stop turning and release setting spindle. If you
override the tripping point inadvertently (ratchet click is heard after the
pointer has snapped), continue turning the setting spindle in the same
direction and repeat setting process.
10.3 Checking the
DUO limit switches
The red test buttons T and P (figure K-2) are used for manual operation of
the DUO limit switches.
.
Turning T in direction of the arrow TSC (DSR) triggers DUO limit switch CLOSED.
The torque switch CLOSED is operated at the same time.
.
Turning P in direction of the arrow TSO (DÖL) triggers DUO limit switch
OPEN.
The torque switch OPEN is operated at the same time.
16
Multi-turn actuators SAN 07.1 – SAN 25.1/SARN 07.1 – SARN 25.1
for valve automation in nuclear power plants
Operation instructions
Figure K-2: Control unit
G
T
H
C
K
P
L
F