Siemens QAA24, QAA25, QAA26, QAA27 User Manual
CM1N1721E
12.07.2003
Siemens Building Technologies
HVAC Products
1
721
QAA24 QAA25…QAA27
Room Temperature
Sensors
QAA24...27
with and without setpoint adjuster
Use
In heating, ventilating and air conditioning plants, especially where a high level of comfort is required.
Major field of application:
Acquisition and adjustment of room temperature.
Type summary
Type reference Description
QAA24
Room temperature sensor
QAA25
Room temperature sensor with setpoint adjuster
(setting range 5...35 °C)
QAA26
Room temperature sensor with setpoint adjuster
(setting range 5...30 °C)
QAA27
Room temperature sensor with setpoint adjuster
(setting range ±3 K)
Ordering
When ordering, please give name and type reference, for example:
Room temperature sensor QAA24
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1721P010
1721P020
2/4
Siemens Building Technologies Room temperature sensors QAA24, QAA25, QAA26, QAA27 CM1N1721E
HVAC Products 12.07.2003
Equipment combinations
Type reference For use with systems/ units
QAA24
All systems/ units that are capable of acquiring and
handling LG-Ni 1000 signals, such as:
UNIGYR
®
/VISONIK®, via a measured value module (measured value input for temperature sensors LG-Ni 1000);
Synco™200, Synco™700; AEROGYR™ RWI65...;
TEC™ RCE9...; POLYGYR
®
RCM6..., RCE6..., RWF...,
RWX... and RWC...; CLASSIC; DESIGO30
QAA25
Synco™200, Synco™700; POLYGYR
®
RCM6..., RCE6...,
RWF..., RWX... and RWC...
QAA26
UNIGYR
®
/VISONIK®, via a measured value module (measured value input for temperature sensors LG-Ni 1000);
AEROGYR™ RWI65...; TEC™ RCE9...
QAA27
Synco™200, Synco™700; CLASSIC RKN…;
DESIGO30 RCK...IB and RCH...IB; AEROGYR™ RWI65...
Mechanical design
The units have been designed for wall mounting. They are suitable for use with most
commercially available recessed conduit boxes. The cables can be introduced from the
rear (concealed wiring) or from below or above (surface-run wires) through knock-out
openings.
The units consist of two major sections: Casing and baseplate. Both snap together but
can be detached again. The casing accommodates the temperature sensing element
and, depending on the type of unit, various setting and operating elements. The baseplate carries the connecting terminals.
(only with QAA25, QAA26 and QAA27)
Front Rear
123
1721Z01
°C
1 Setting knob for infinite setpoint adjustment
2 Pin for mechanical maximum limitation of setpoint setting range
3 Pin for mechanical minimum limitation of setpoint setting range
For the permissible lengths of lines and measured value errors, refer to «Basic
System Data» of the respective control system.
Engineering notes
For the permissible lengths of lines and measured value errors, refer to «Basic
System Data» of the respective control system.
• UNIGYR
®
/VISONIK
®
When using the QAA26, both the temperature sensor and the setpoint setting unit
must be connected to a measured value input (B...) of the measured value module
(PTM1.2R1K).
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Setting and operating
elements
Legend
Disposal
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