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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 gas-
fired appliances with integrated boiler temperature controllers.
Functions
Q
AA73.110
Q
AA53.110
•
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
