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Technical Instructions
Document No. 155-710
599 Series
Zone Valve Actuator
September 16, 2009
SSA/P Series 24 Vac Electronic
Valve Actuator: Floating or
0 to 10 Vdc Control
Fail-in-Place
Description
The 599 Series SSA/P Electronic Valve Actuator requires a 24 Vac power supply and
receives a 0 to 10 Vdc or a floating control signal to control a valve. This actuator is
designed to work with 599 Series Zone Valves with a 1/10-inch (2.5 mm) stroke and a
threaded valve bonnet that fits the actuator.
Features
•
Direct-coupled installation without tools
•
Manual override with hex wrench
•
Visual position indication
Application
For use in heating and cooling HVAC applications with Siemens 599 Series Zone Valves
that need 24 lb (105N) nominal force.
Product Number
Part Number
SSA81U
SSA61U
SSP61U
Ordering
Information
Description
Floating
24 Vac
0 to 10 Vdc
Normally Closed
Normally Open
Prefix Code
244
245
248
To order a complete valve plus actuator assembly from the factory, combine the
actuator prefix code with the suffix of the valve product number.
To order a single actuator, use the product number (for example, SSA61U).
Siemens Industry, Inc.
Technical Instructions
Document Number 155-710
September 16, 2009
SSA/P Series Electronic Valve Actuator
24 Vac Floating or 0 to 10 Vdc Control
Warning/Caution Notations
WARNING
Personal injury/loss of life may occur if you do not perform a
procedure as specified.
CAUTION
Equipment damage may occur if you do not perform a
procedure as specified.
Specifications
Power supply
Operating voltage
Frequency
Power consumption
Function
Running time
SSA81U
SSA/P61U
Ambient conditions
SSA81U
SSA/P61U
24 Vac ±20%
50/60 Hz
0.8 VA
24 Vac ±20%
50/60 Hz
2.5 VA
Nominal stroke
Nominal force
150 seconds
34 seconds
1/10-inch (2.5 mm)
24 lb (105N)
Ambient temperature
Operation
Transport and storage
41°F to 122°F (5°C to 50°C)
-13°F to 158°F (-25°C to 70°C)
Agency certification
Conformance
UL
Miscellaneous
EMC directive
Low Voltage direction
89/336/EEC
73/23/EEC
UL873, cUL Certified to Canadian
Standard C22.2 No. 24-93
Medium temperature
Dimensions Inches (mm)
Weight
34°F to 230°F (1°C to 110°C)
3.26 H×3.26 W×1.9 D (82×83×48)
9 oz (0.25 kg)
Accessory
ASY97: Conduit connector, quantity one (1).
Figure 1. Conduit Connector.
Service Kits
ASY99: Terminal block cover and terminal
plug for SSA81U, quantity one
each.
Figure 2.
Block Cover and Terminal Plug
Page 2
Siemens Industry, Inc.
SSA/P Series Electronic Valve Actuator
24 Vac Floating or 0 to 10 Vdc Control
Technical Instructions
Document Number 155-710
September 16, 2009
Service Kits,
Continued
ASY100: Terminal block cover and terminal
plug for SSA/P61U, quantity one
each.
Figure 3.
Block Cover and Terminal Plug
ASY8L15: Cable connector, 1.5m cable,
rated, quantity one.
ASY8L45: Cable connector, 4.5m cable,
rated, quantity one.
NOTE:
These cables are not plenum rated.
Figure 4. Cable Connector.
ASY98: Replacement screw and nut for conduit connector quantity one (1).
Operation
The actuators can be driven manually to any position between 0 and 1 with a 3 mm hex
wrench. The control signal from the controller; however, will take priority over any
manual position.
Mounting and
Installation
Figure 5. Mounting Position.
Mount the actuator in one of the allowable positions shown in Figure 5.
NOTE: Vertical is the recommended position.
When mounting the actuator in a plenum, the proper cable must be attached to meet
local codes.
Allow 8-inches (200 mm) above the actuator and 8-inches (200 mm) behind the cable
for service.
Installation Instructions are included with the actuator.
Siemens Industry, Inc.
Page 3
Technical Instructions
Document Number 155-710
September 16, 2009
SSA/P Series Electronic Valve Actuator
24 Vac Floating or 0 to 10 Vdc Control
Wiring
Figure 6. SSA/P61U Wiring Diagram.
Figure 7. SSA81U Wiring Diagram.
•
Do not use autotransformers.
•
Use earth-ground isolating, step-down, Class 2, power supplies.
•
Determine supply transformer rating by summing total VA of all actuators used.
•
Use one transformer to power up to 10 actuators.
WARNINGS:
Page 4
•
Wire connection G is 24 Vac HOT on the SSA/P61U, not neutral.
•
G0 and G must be properly wired for correct function and full life of
the actuator.
Siemens Industry, Inc.
SSA/P Series Electronic Valve Actuator
24 Vac Floating or 0 to 10 Vdc Control
Manual Override
Technical Instructions
Document Number 155-710
September 16, 2009
The actuators can be driven manually to any position between "0" and "1" with a 3 mm hex
key. The actuator will maintain its position until power is provided or restored. A control signal
from the controller, however, will take priority over any manual position.
NOTES:
• Do not perform a manual override while the power supply is connected: The actuator
will not track properly when the control signal is applied. A short power-off/power-on
sequence is recommended to recalibrate the actuator.
•
To hold the actuator in the manually set position, the connecting cable must be
unplugged.
NOTE:
The "0" and "1" position
markings are for
reference only and not
for stroke measurement.
Position Indicator at 0
Position Indicator at 1
Figure 8. Position Indicator.
Siemens Industry, Inc.
Page 5
Technical Instructions
Document Number 155-710
September 16, 2009
Start-Up
SSA/P Series Electronic Valve Actuator
24 Vac Floating or 0 to 10 Vdc Control
Check the wiring and the position indication. See Figure 8 for referred positions “0” and “1” on
the position indicator disc.
SSA61U and SSA81U Normally Closed
•
When the position indicator disc is at the "0" position the output shaft is extended
(two-way valve closed).
•
When the position indicator disc rotates to position “1”, the output shaft is retracted
(two-way valve open).
SSP61U Normally Open
•
When the position indicator disc is at the "0" position, the output shaft is retracted
(two-way valve open).
•
When the position indicator disc rotates to position “1”, the output shaft is extended
(two-way valve closed).
CAUTION:
The SSA61U and the SSP61U calibrate (calibration stroke) during start-up.
Correct functioning cannot be guaranteed if the actuator is operated without a
valve.
Figure 9. SSA61U and SSA81U
Normally Closed.
Page 6
Figure 10. SSP61U
Normally Open
•
(A) Turn the hex wrench
counterclockwise and spindle retracts.
•
(A) Turn the hex wrench clockwise and
spindle extends.
•
(B) Turn hex wrench clockwise and
spindle extends.
•
(B) Turn hex wrench counterclockwise
and spindle retracts.
Siemens Industry, Inc.
SSA/P Series Electronic Valve Actuator
24 Vac Floating or 0 to 10 Vdc Control
Troubleshooting
Technical Instructions
Document Number 155-710
September 16, 2009
See Wiring for proper connections.
If the actuator does not provide full flow or full close off, check that the actuator is
properly attached to the valve. If not, turn power off, tighten the bonnet ring on to the
valve completely, and power up to recalibrate.
If the actuator becomes inoperative, replace it.
Dimensions
Inches (Millimeters)
Figure 11. Dimensions of the SSA/P Series Actuator in Inches (mm).
Service envelope
Minimum access space recommended:
8-inches (200 mm) above the actuator and beside the terminal plug.
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. Product or company names mentioned herein may be the trademarks of their respective owners. ©2009
Siemens Industry, Inc.
Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089
+ 1 847-215-1000
Your feedback is important to us. If you have
comments about this document, please send them
to sbt_technical.editor.us.sbt@siemens.com
Document No. 155-710
Printed in the U.S.A.
Page 7
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