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SSC Series Electronic Valve Actuator
Product Description
The SSC series actuator requires a 24 Vac, Class 2
supply and provides a 0 to 10 Vdc or Floating (three-
position) control signal. The actuator controls a
Powermite™ 599 Series MT Series valve with a
7/32-inch (5.5-mm) stroke.
Warning /Caution Notations
WARNING:
CAUTION:
Product Numbers
SSC61U
0 to 10 Vdc, proportional control,
non-spring return (fail-in-place)
SSC61.5U
0 to 10 Vdc, proportional control,
spring return (fail-safe)
SSC81U
Floating control, non-spring return
(fail-in-place)
SSC81.5U
Floating control, spring return
(fail-safe)
Contents
One SSC actuator
Estimated Installation Time
20 minutes
Required Tools
•
Small Phillips head screwdriver
•
Small flat-blade screwdriver
•
Wire stripper
Item Number 129-253-07, Rev. FA
Personal injury or loss of life
may occur if you do not
perform a procedure as
specified.
Equipment damage or loss of
data may occur if you do not
follow a procedure as
specified.
Prerequisites
WARNING:
1.
If mounting the actuator to a valve already
in line, either close the shut-off in the
piping (upstream first, then downstream) or
switch off the pump to allow the differential
pressure in the valve to drop.
2.
Disconnect the controller power before
replacing the actuator.
3.
If high voltage cable is co-located with the
SSC actuator, conduit or shielded wire may
need to be used.
CAUTION:
Before applying power, make certain a valve is
connected to the actuator.
If applying power to the actuator when a valve is
not connected, the actuator will respond to a
control signal and the shaft will extend until it
reaches its maximum end stop. Thereafter, it will
not respond to any signal.
If this occurs, disconnect the power. Turn the
manual position indicator on the top of the
actuator to the 0 position and verify the actuator
shaft retracts completely. See Figure 4.
Connect a valve to the actuator and reapply the
power. The actuator will return to normal
operation.
Mounting
The vertical position is recommended for mounting
the actuator. See Figure 1.
Figure 1.
Acceptable Actuator Mounting Positions.
CAUTION:
Mount actuator at a 45° angle from vertical when
using on low pressure steam systems to reduce
radiant heat that can damage the actuator.
Installation Instructions
Document No. 129-253
May 8, 2019
Page 1 of
5
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Summary of Contents for Siemens SSC Series
- Page 1 May 8, 2019 SSC Series Electronic Valve Actuator Product Description Prerequisites The SSC series actuator requires a 24 Vac, Class 2 WARNING: supply and provides a 0 to 10 Vdc or Floating (three- If mounting the actuator to a valve already position) control signal.
-
Page 2: Installation
Insert wiring retention screw in hole of the flex conduit adapter. (The hole nearest the wiring terminals is to secure the terminal cover in place.) Continue with Step 8. Figure 4. Manual Override. Page 2 of 5 Siemens Industry, Inc. - Page 3 Installation Instructions May 8, 2019 Calibration Stroke The SSC Series writes its calibration stroke parameters to nonvolatile memory on the first start-up of the actuator. Successive start-ups bypass the calibration stroke unless the memory is manually cleared. If installing the actuator...
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Page 4: Troubleshooting
Check the wiring and the position indicator (Figure 11). Selection Position Output Indicator Shaft Retracted Extended NOTE: 0 and 1 markings are intended for reference only, and not stroke measurement. Figure 11. Position Indicator (Shown in 0 Position). Page 4 of Siemens Industry, Inc. - Page 5 Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. Powermite is a trademark of Siemens Industry, Inc. Other product or company names mentioned herein may be the trademarks of their respective owners. © 2019 Siemens Industry, Inc.