Data Sheet for Product

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Siemens HVAC central apartment unit with consumption data acquisition QAX903 CE1N2741en

Building Technologies 2016-01-30

The Synco living ECA system is fully compatible with the Synergyr system and

allows for conversion of individual units in a Synergyr system (partial migration).

The meter information is displayed on the QAX903 central apartment unit and for-

warded via the Synergyr building bus to the OZW30 building central station.

Detailed information the Synco living ECA system is available in the data sheet on

the consumption data interface (N2735en).

Device and system functions

Synco living features a number of inputs and outputs which can be used either via

the universal input/output of the central apartment unit (locally), or the universal

inputs/outputs of the RRV912 / RRV918 heating circuit controllers, or the RRV934

multi-controller.

The inputs and outputs can be assigned the following functions:

Inputs

• Changeover of apartment operating mode

• Changeover to summer operation

• Cooling enable

• Heating/cooling changeover

• Dew point monitor

• Flow and return sensor

• Ventilation contacts 1 and 2 (e.g. hygrostat)

• Chimney mode

• Triggering the absence function

• Air quality sensor (CO

sensor)

• Humidity sensors

Synergyr integration

Inputs and outputs