The Siemens SSB161.05UT is an electromotoric actuator designed for use with pressure-independent zone valves, small globe valves, and third-party valves in various HVAC applications. It is particularly suitable for chilled ceiling, VAV (Variable Air Volume), and fan coil unit systems.
Function Description:
The actuator operates on an AC/DC 24 V supply voltage and receives a DC 0-10 V positioning signal. This signal dictates the valve's stroke, which is then transmitted to the valve stem. The valve opens or closes proportionally to the positioning signal. At 0 V, the actuator stem is retracted, ensuring the normally closed valve is fully closed. In the event of a power outage, the actuator maintains its current position. A key feature is its self-calibration capability, which automatically adjusts to the valve's stroke upon power application. This process involves the actuator moving from a fully retracted to a fully extended position and then to the setpoint. Correct calibration requires a valve stroke greater than 1.2 mm; if the stroke is less, calibration will fail. In case of failure, the actuator attempts recalibration after 10 seconds. After three failed attempts, the actuator stem remains in the extended position, closing the valves, and the LED indicator changes to "stays red." The actuator also supports manual override, allowing the stem position to be adjusted using a 3-mm Allen wrench. This mode can be entered and exited by pressing and holding a button for at least three seconds. During manual operation, the actuator ignores positioning signals from the controller. Upon exiting manual mode, the actuator performs a self-calibration.
Important Technical Specifications:
- Operating Voltage: AC 24 V (± 15%) or DC 24 V (± 20%)
- Frequency: 50/60 Hz
- Power Consumption: 3 VA
- Primary Fuse/Breaker Rating: External, 2 A quick blow
- Positioning Signal: DC 0-10 V
- Input Impedance: 100 kOhm
- Parallel Operation: Up to 10 actuators (provided controller output is sufficient)
- Running Speed: < 5 s/mm ± 25%
- Positioning Force: 200 N
- Stroke: 1.2-6.5 mm
- Permissible Temperature of Medium in Connected Valve: 1-120°C
- Permissible Length for Signal Lines: <20 m
- Wire Cross Section: 0.5-0.75 mm²
- Cable Diameter: <5 mm
- Connection to Valve: Plastic coupling nut ¾" inch
- Orientation: 360°
- Housing Protection Degree: IP 54
- Protection Class (EN 60730): III
- Pollution Degree: 2
- Overvoltage Category: III
- Operating Temperature: 1-50 °C
- Operating Humidity: 5-95% r.h. (non-condensing)
- Storage/Transport Temperature: -25-70 °C
- Storage/Transport Humidity: <95% r.h. (non-condensing)
- Atmospheric Pressure: Min. 700 hPa (corresponding to max. 3,000 m above sea level)
- Cover/Base Material: PC + ABS
- Weight: 222 g
- Dimensions: 86.6 mm (length) x 49 mm (width) x 92.6 mm (height), with M16x1.5 connection.
Usage Features:
- Compatibility: Designed for zone valves (VVP.., VXP.., VMP..) and third-party valves, ensuring broad application.
- Direct Mounting: Features direct mounting with a coupling nut, eliminating the need for additional tools during installation.
- Self-Calibrating: Automatically adjusts to the valve stroke, simplifying setup and ensuring optimal performance.
- LED Indication: Provides clear visual feedback on the actuator's status, including stroke movement (retracting/extending), stem position (H0-H40, H40-H60, H60-H100), calibration status, error conditions, and manual operation mode.
- Manual Override: Allows for temporary manual adjustment of the valve position, useful for commissioning or troubleshooting.
- Parallel Operation: Up to 10 units can operate in parallel, enhancing system flexibility.
- Robust Design: IP 54 housing protection degree ensures durability in various environments.
- Safety: Adheres to national safety regulations and includes cautions against using pipe wrenches or applying lateral pressure/cable tension during mounting. It also warns against phase cut and pulse-duration-modulated (PDM) signals.
Maintenance Features:
- Maintenance-Free: The actuators are designed to require no maintenance, reducing operational costs and effort.
- Error Indication: The LED provides a "constant red" indication for errors caused by mechanical jams or calibration failures, prompting a reset of the operating voltage.
- Troubleshooting: The LED indication patterns assist in diagnosing operational issues, such as stroke movement, stem position, and calibration status.
- Service Work Guidelines: When performing service work, it is crucial to switch off the operating voltage, disconnect electrical connections if necessary, and ensure the actuator is commissioned only with a correctly mounted valve.
- Product Documentation: Comprehensive documentation, including mounting instructions, CE declarations, RCM conformity, and environmental declarations, is available for download, supporting installation, operation, and compliance.
- Open Source Software (OSS): Information on OSS components used in the device, including copyrights and licensing agreements, is provided, ensuring transparency and compliance.
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