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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

Application

Summary of Contents for QAA53.110

Page 1: ...ogram 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 fe...

Page 2: ...ng 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 dis...

Page 3: ...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 ...

Page 4: ... 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...

Page 5: ...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 o...

Page 6: ...n diagram 1 2 3 4 5 6 COA COB OpenTherm terminal A interchangeable OpenTherm terminal B interchangeable 1 3 4 5 6 2 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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