Data Sheet for Product

Technical Instructions 599 Series Zone Valve Actuator
Document No. 155-321P25 SF Series Electronic Valve Actuator
April 1, 2021 2-position Control
Page 4 Siemens Industry, Inc.
Manual
Override
For manual positioning, simply turn the manual override handle to the protruding stop and
squeeze the handle to latch and hold its position.
The actuator will maintain its position until power is provided.
Figure 4. Manual Override Handle Positioning.
Start-Up
Check the wiring and the position indication.
When the position indicator is in the 0 position:
SFP: The output shaft will be retracted; the actuator is Normally Open. See Figure 5.
SFA: The output shaft will be extended; the actuator is Normally Closed. See Figure 6.
When the position indicator is in the 1 position, the reverse is true.
(A) Allow handle to turn counterclockwise to retract spindle.
(B) Turn handle clockwise to extend spindle.
Figure 5. SFP Models, Normally Open.
(A) Allow handle to turn counterclockwise to extend spindle.
(B) Turn handle clockwise to retract spindle.
Figure 6. SFA Models, Normally Closed.
NOTE:
The 0 and 1 position
indicators are intended
for reference only, and
not for stroke
measurement.
CAUTION:
Avoid damage to
actuator; DO NOT
manually assist
spring return.