Siemens QAA53.110, QAA73.110 Quick Manual
CE1Q2282en
04.09.2001
Siemens Building Technologies
HVAC Products
OEM
QAA53.110 QAA73.110
Room Units for
Boiler Temperature
Control
QAA53.110
QAA73.110
OpenTherm interface
Digital, multifunctional room units for enhancing the functionality of boiler
controllers.
With integrated temperature sensor, heating program and a number of control
functions.
Use
Used in combination with a boiler controller or heating controller. Room temperature
control in:
• Single or 2-family houses
• Smaller multifamily houses
• Holiday houses and villas
For use in all standard heating systems, such as radiator or convector heating systems.
Especially suited for heating plants with pump heating circuits. If the boiler control
systems feature integrated mixing valve control, it is also possible to control mixing
heating circuits.
Use
A
pplication
2/6
Siemens Building Technologies Room Units QAA53, QAA73 CE1Q2282en
HVAC Products 04.09.2001
The room units are designed for the OEM market. They are supplied directly to the
boiler manufacturer and enhance the functionality and the level of control of small gasfired appliances with integrated boiler temperature controllers.
Functions
QAA73.110
QAA53.110
• Generation of the flow temperature setpoint x x
• Pure room temperature control x x
• Weather-compensated flow temperature control while giving consideration to
the building’s thermal dynamics
x
• Weather-compensated flow temperature control with room compensation x
• Effect of room temperature deviation can be adjusted x
• Optimum start / stop control x
• ECO functions (24-hour limit switch, automatic summer / winter changeover) x
• Quick setback x x
• Room temperature switching differential for limiting the room temperature x x
• Adjustable maximum limitation of the flow temperature (especially in
connection with floor heating systems)
x
• Limitation of the rate of increase of the flow temperature setpoint x
• Frost protection for the building x x
• Frost warning x
• D.h.w. control with release and preselection of setpoint for the boiler controller x
• Legionella function x
• Integrated yearly clock with backup (minimum 12 hours) x
• Integrated 24-hour clock with backup (minimum 12 hours) x
• Operating levels based on ergonomic and functional considerations x x
• Operating mode, setpoint adjustment and occupancy button x x
• Every setting or change is displayed and thus acknowledged x x
• Clear text display in a number of selectable languages x
• 7-segment display x
• A number of actual values can be accessed via the Info button x
• Additional functions can be programmed after opening the cover x
• Special service level with protected access x
• Yearly clock with automatic summer- / wintertime changeover x
• One 7-day program per heating circuit and up to 3 switching cycles per day
can be selected on an individual basis
x
• 24-hour heating program with up to 3 switching cycles x
• 7-day d.h.w. heating program with up to 3 switching cycles per day can be
selected on an individual basis
x
• Holiday program x
• The heating programs and the d.h.w. program can be reset to their default
settings
x
• Programming lock (e.g. for child-proofing) x
• Special mode for setting the parameters of Siemens boiler control systems x
Market
Functions
Operating functions
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