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General| Type | Control Unit |
|---|---|
| Model | QAA73.210 |
| Manufacturer | Siemens |
| Power Supply | 24 V AC / DC |
| Frequency | 50/60 Hz |
| Mounting Type | DIN Rail |
| Degree of Protection | IP20 |
| Input Voltage | 24 V |
| Humidity Range | 10% to 95% (non-condensing) |
Lists the key features of the room unit, covering operating modes, functions, and additional capabilities.
Details the conditions for product usage and compliance with regulations.
Explains the proper disposal procedures for electronic waste according to directives.
Discusses the considerations for selecting the mounting location and height for optimal room temperature sensing.
Lists common operational issues and their potential causes and checks for the room unit and boiler control.
Explains the basic operation of the room unit, including operating elements, buttons, and display icons.
Details the different space heating modes (Automatic, Continuous, Protection, Cooling) and their characteristics.
Describes how to switch Domestic Hot Water (DHW) heating on/off and set temporary setpoints.
Explains how to adjust comfort and reduced room/DHW temperature setpoints using the unit's buttons.
Details the function of the presence button for reducing room temperature and saving energy during unoccupied periods.
Explains how to view various data points and system parameters using the info button.
Details how the unit indicates errors and lists common error codes with their descriptions.
Explains how boiler lockout is displayed and the procedure to reset the BMU.
Describes the chimney sweep function and controller stop status, and how modulation level can be set.
Describes the different user levels (End user, Heating engineer, OEM) and how to access them for settings.
Provides a comprehensive table of all configurable settings for heating, cooling, and DHW, including their ranges and default values.
Emphasizes the importance of correctly setting the time and day for program operation.
Covers defining day selection and specific switching times for heating and DHW programs.
Details settings for comfort, reduced, and frost protection temperatures, flow limitations, and heating curve slope.
Describes the criterion for automatic switching between summer and winter heating modes based on temperature.
Explains the function of switching heating on/off based on outside temperature for short-term variations.
Defines how room temperature deviations influence the controlled system and how to adjust this factor.
Explains the function of quick setback, deactivating the heating circuit pump temporarily.
Describes the function used for room temperature limitation to prevent overheating and its effect on switching differential.
Covers nominal and reduced DHW setpoints, maximum/minimum limits for hot water temperature.
Details the function that periodically raises DHW temperature to prevent legionella bacteria growth.
Explains settings to enable/disable DHW time switch programs and the cooling function.
Outlines weather compensation, room influence, and fix flow temperature setpoint methods for temperature control.
Explains how building heat losses are compensated by adequate flow temperature based on outside conditions.
Describes enhanced comfort through feedback from room influence, adjusting flow temperature based on room conditions.
Details the PID control algorithm for room compensation, using actual room temperature and its gradient.
Explains how to manually set a fixed flow temperature setpoint, requiring specific prerequisites.
Provides physical dimensions of the unit and specifications for panel cutout for installation.
Lists key technical data including power supply, measurement ranges, environmental conditions, standards, and software class.
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