Siemens QAA24 Bedienungsanleitung

CM1N1721E

12.07.2003

Siemens Building Technologies

HVAC Products

1721

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 com-

fort 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

1721P010

1721P020

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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 (measu-

red 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 (measu-

red 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 ba-

seplate 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).

Setting and operating

elements

Legend

Disposal

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Siemens Building Technologies Room temperature sensors QAA24, QAA25, QAA26, QAA27 CM1N1721E

HVAC Products 12.07.2003

•AEROGYR™ RWI65...

When using the QAA26 in connection with the RWI65…, the latter must be set to

the setpoint setting range "Heating". In that case, the setpoint of "Heating" on the

RWI65... must be set to 20 °C and additionally, the following must be set:

–Data point 44 to –15 K and data point 45 to + 15 K for RWI65.01

–Commissioning data point 9 to –15 K and commissioning data point 10 to +15 K

for RWI65.02

•When using the QAA27, the setpoint adjustment knob must be set to its centre posi-

tion. Additionally, the following must be set:

–Data point 44 to –4 °C and data point 45 to +5 °C for RWI65.01. The offset at data

point 50 must be corrected until data point 2 has value 0.

–Commissioning data point 9 to –15 °C and commissioning data point 10 to +15 °C

for RWI65.02. The offset at commissioning data point 15 must be corrected until

normal data point 2 has value 0.

•POLYGYR®RCM6..., RCE6... and RWF...

For averaging with two temperature sensors and a POLYGYR® controller, the sen-

sors need to be connected in series and the controller requires a setting range insert

AZW61.119-tx50.

If the QAA25 is used with a shift controller, the sensor's range (0...50 °C) is required

for calculating the authority

•CLASSIC RKN…

Setpoint adjustments via QAA27 is possible only with controllers RKN8-L, RKN88-L,

RKN-W and RKN88T.

Fitting and installation notes

Location: On an inner wall of the space to be heated or air conditioned. Not in reces-

ses, shelves, not behind curtains, not opposite or near heat sources.

The unit must not be exposed to direct solar radiation.

The end of the conduit at the sensor must be sealed to prevent false measurements

due to draughts through the conduit.

The permissible ambient conditions should be observed.

Installation instructions are printed on the packing.

Technical data

Range of use 0...50 °C

Setting range refer to «Type summary»

Max. permissible line lengths

and measured value errors refer to «Engineering notes»

Connection terminals for

cross-sectional areas of 2 x 1.5 mm2or 1 x 2.5 mm2

Degree of protection IP 30 to EN 60 529

Safety class III to EN 60 730

Operation to IEC 721-3-3

Climatic conditions class 3K5

Temperature 0...50 °C

Humidity < 85 % r. h.

Transport to IEC 721-3-2

Climatic conditions class 2K3

Temperature −25...+ 65 °C

Humidity < 95 % r. h.

Mechanical conditions class 2M2

conformity to EMC directive 89 / 336 / EEC

General data

Connection terminals

Protective data

Environmental conditions

Norms and standards

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Siemens Building Technologies Room temperature sensors QAA24, QAA25, QAA26, QAA27 CM1N1721E

HVAC Products 12.07.2003

Housing front ASA+PC, NCS S 0502-G (white)

Botton section of housing ASA+PC, NCS 2801-Y43R (grey)

Base PC, NCS 2801-Y43R (grey)

Sensor (entirely) silicon-free

with packaging approx. 0,1 kg

Sensing element 1) LG-Ni 1000 (thin-film element)

Time constant 7 min (depending on air movement and thermal

coupling to the wall)

1) QAA25...27 from serie B on with thin-film element

QAA25 QAA26 QAA27

Setpoint setting range 5...35 °C 5...30 °C ±3 K

Resistance range 95...685 Ω1000...1195 Ω1000...1175 Ω

Resistance value at setpoint 0 K 1091 Ω

10 °C 193,9 Ω1039 Ω

20 °C 390,0 Ω1118 Ω

25 °C 488,3 Ω1157 Ω

30 °C 586,7 Ω1195 Ω

Internal diagram

LG-Ni 1000

1721G01

1721G02

LG-

Ni 1000

RBM

LG-Ni 1000

BMRM

1721G03

B1 Room temperature measuring signal

M Measuring neutral

R Setpoint signal

Dimensions

100

°C

4,2

9,5

1721M01

Dimensions in mm

Materials and colors .

Weight

Sensor

Setpoint setting knob

QAA24

QAA25, QAA26

QAA27

Legend

ã2001 Siemens Building Technologies AG n

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