| Producer | Siemens |
The set includes a central unit (Siemens QAW912) for setting the required room temperatures and time programs and control actuators (4 x Siemens SSA955) for controlling the control valves on the radiators. This allows individual temperature control in up to two rooms. The easy-to-read display of the central unit shows all current information about the system status, and the unit can control up to six control servo drives for radiator valves (can be purchased separately). The system is equipped with a function to protect the thermostatic valves against freezing during inactivity. Standard AA batteries are used as a power source.
STARTER-KIT ADVANTAGES:
| TECHNICAL PARAMETERS | |
|---|---|
| Thermostat/transmitter: | |
| Power supply | 2x alkaline batteries LR6 (AA) 1,5V |
| Battery lifetime | 2 years |
| Temperature measurement range | 0°C to +50°C |
| Frequency | 868 MHz bidirectional |
| Range | typically 30m in built-up areas |
| Time constant | 20 min |
| Temperature resolution | 0,1°C |
| Internal thermistor | NTC 10 kOhm at 25°C |
| Thermostat dimensions | 84 x 130 x 24 mm |
| Receiver: | |
| Power supply | 3x alkaline batteries LR6 (AA) 1,5V |
| Battery lifetime | 3 years normal operation (30dBA) 2 years quiet operation(25dBA) |
| Converting power | 110N typical |
| Control type | PID |
| Max allowed heating temperature | 110°C |
| Min./typical stroke | 0.5 mm/2.5 mm |
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