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Brief description
Operating functions
Functions
6/70
Siemens Building Technologies
HVAC Products
1
Summary
The QAA73.110 is a digital multi-functional room unit for one or 2 heating circuits and
d.h.w. control.
Boiler control delivers the outside temperature and other information to the QAA73.110
room unit via the OpenTherm communication interface. Based on the outside
temperature, the room temperature and a number of other parameters, the interface
calculates the required flow temperature setpoints for one or 2 heating circuits and
transmits them to the boiler control. In addition, the d.h.w. temperature setpoint is
transmitted to the boiler control.
The optimization functions offer energy savings without sacrificing comfort. The room
sensor required for that purpose is integrated in the unit.
1.1
Features
• Operating sections (operating levels) based on ergonomic and functional
considerations
• Clear assignment of basic functions:
−
Operating mode, setpoint adjustment and occupancy button
−
A number of actual values can be accessed via the Info button
−
Additional functions can be programmed after opening the cover
−
Special service level with protected access
• Every setting or change is displayed and thus acknowledged
• Yearly clock with automatic summer- / wintertime changeover
• One heating program per heating circuit with up to 3 heating periods per day can be
selected on an individual basis
• D.h.w. program with up to 3 heating periods per day can be selected on an
individual basis
• Holiday program
• The heating programs and the d.h.w. program can be reset to their default settings
• Programming lock (e.g. for child-proofing)
• Clear text display in a number of selectable languages
• Special mode for setting the parameters of Siemens boiler control systems
• Weather-compensated flow temperature control while giving consideration to the
building's thermal dynamics
• Weather-compensated flow temperature control with room compensation
• Pure room temperature control
• Effect of room temperature deviation can be adjusted
• Optimum start / stop control
• ECO functions (24-hour limit switch, automatic summer / winter changeover)
• Room temperature switching differential for limiting the room temperature
• Adjustable maximum limitation of the flow temperature (especially in connection with
floor heating systems)
• Limitation of the rate of increase of the flow temperature setpoint
• Frost protection for the building, frost warning
• D.h.w. control with release and preselection of setpoint for the boiler controller
• Legionella function
• Integrated yearly clock with a reserve of at least 12 hours
Basic Documentation QAA73.110 Room unit
Error! Style not defined.
CE1P2284en
19.06.2002
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