Siemens QAA73.110 User 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
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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
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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HVAC Products 04.09.2001
•Elegant housing made of recyclable plastic x x
•Communication with the boiler control via OpenTherm interface x x
•Power supply via OpenTherm bus x x
•Straightforward installation xx
•Cable entry for wall mounting or mounting on a recessed conduit box xx
Type summary
Type Type reference Compatible with
QAA73.110
QAA53.110
Room unit with OpenTherm
interface
•LMU... with OpenTherm interface
•Other types of boiler controllers with
OpenTherm interface
AVS92.299 Mounting clips for panel
mounting
Technical features
For communication between the room unit and the boiler control, the OpenTherm bus is
used.
The room unit differentiates between 2 OpenTherm modes, Plus and Lite:
•In OpenTherm Plus mode, the room unit can read or write various standardized
objects via the bus
•In OpenTherm Lite mode, the room unit of the boiler control only delivers a signal for
controlling the heat output. In the event of fault, the boiler control sends message
Boiler Lockout Fault to the room unit
Right after the electrical connection, the room unit ascertains whether the boiler
controller supports the OpenTherm Plus or the OpenTherm Lite protocol.
Usually, maximum limitation of the flow temperature is
predefined by the BMU and sent to the room unit via
OpenTherm. If the BMU does not transmit any limitation , it
can be lowered on the room unit from 80 °C (standard setting)
to 60 °C by cutting the oppropriate wire link. This is especially
required when the flow temperatures called for by the heating
circuit are below 60 °C.
The wire link must be cut in a way that the ends of the wires do not touch any more,
that they do not make contact with other conductive surfaces and that parts of the wire
link do not fall inside the unit!
For a more detailed description of the technical design, refer to documentation
CE1P2284.
Other features
Communication
Maximum limitation of
the flow temperature
(only QAA53.110)
Caution
Additional function
descriptions
2282Z02
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Mechanical design
The unit consists of the following components:
•Housing with integrated electronics and operating elements
•Base for wall mounting with the connection terminals
•Button for selecting the operating mode
•Setting knob for adjusting the setpoint
•Occupancy button for temporary changeover
•Info button (QAA73.110)
•Line selection and adjustment of values with buttons behind the housing front
(QAA73.110)
2282Z01
QAA53.110
2284Z03
QAA73.110
Technical data
OpenTherm bus
Connection
Cable length
Cable resistance
Power consumption
2-wire connection (interchangeable)
max. 50 m
max. 2 x 5 Ω
35 mW (typically)
Safety class
Degree of protection of housing
Contamination
III to EN 60730
(when mounted correctly)
IP 20 to EN 60529
environment to EN 60730
Operation
Temperatures
Humidity
Transport
Temperatures
Humidity
Storage
Temperatures
Humidity
IEC 721-3-3 class 3K 5
0...50 °C
< 85 % r.h.
IEC 721-3-2 class 2K 3
-25..0.70 °C
< 95 % r.h.
IEC 721-3-1 class 1K 3
-25..70 °C
< 95 % r.h.
conformity
EMC directive
– Immunity
– Emissions
Low voltage directive
– Electrical safety
89/336/EEC
EN 50082-1, EN 50082-2, EN 60730-1
EN 50090-2
EN 50081-1, EN 50081-2, EN50090-2-2
73/23/EEC
EN 60730-1, EN 60730-2-9
Measuring range 0...45 °C
Backup of time switch
Software class
Weight
min. 12 h
A to EN 60 730
approx. 0.17 kg
Room unit
Operating elements
Display
Operating voltage
Protection
Environmental
conditions
Standards
Room sensor
Other features
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Notes
•The products may only be used in building services plant and applications as
described above
•When using the products, all requirements specified under “Technical data” must be
observed
•The local regulations for electrical installation must be complied with
•In the main living room or reference room
•The place of installation should be chosen so that the sensor can capture the room
temperature as accurately as possible, without being affected by direct solar radiation
or other heating or cooling sources.
•Mounting height is about 1.5 meters above the floor
•The unit can be fitted to most commercially available recessed conduit boxes or
directly on the wall.
•Wall mounting
2284Z33a
2284Z34a
2284Z35a
•Boiler control panel, securing with mounting clips (only QAA73.110).
When using flush panel mounting, the effect of room temperature deviations must be
deactivated
y
2284Z37
2284Z35a
2284Z15
2284Z38
•The controller may not be exposed to dripping water
•Permissible ambient temperature: 0..0.50 °C
•The local regulations for electrical installations must be complied with.
Product liability
Engineering
installation
Installation
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HVAC Products 04.09.2001
Connection diagram
1
2
3
4
5
6
COA
COB
-
-
-
-
OpenTherm terminal A (interchangeable)
OpenTherm terminal B (interchangeable)
-
-
-
-
1
34
562
2284Z40
23 mA max
QAA73 and QAA53 with
Dimensions
2284M02
96
96
91
47
96
1...2.5
92
+0.8
-0
92 +0.8
-0
2284M01
96
Room unit
Panel cutout
ãSiemens Building Technologies Ltd.
Subject to alteration
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