Data Sheet for Product

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Siemens HVAC central apartment unit with consumption data acquisition QAX903 CE1N2741en
Building Technologies 2016-01-30
System limits
126 Central apartment units QAX903
1 Meteo sensor
12 Rooms
1 Humidity sensor
1 Air quality sensor
1 Condensation monitor
3 RF repeaters
4 Heat meters (heating, cooling or combined)
4 Hot water meters
4 Chilled water meters
3 Electricity meters
3 Gas meters
2 Other meters (e.g. oil, steam)
94 RF components (total, including central apartment unit)
1 Room unit
2 Room temperature sensors
1 Heating circuit controller with a maximum of six channels*
6 Radiator control actuators (1 lead controller, 0 - 5 lag controllers)
or heating circuit controller channels
6 Window contacts
Radiator control actuators and heating circuit controllers cannot be used simulta-
neously in the same room.
Warranty
Application-related technical data are only warranted in connection with the Sie-
mens Synco living system.
User is responsible for proper operation of QAX903 when used together with
third-party devices not specifically mentioned here. Siemens assumes no
responsibility for service and warranty under these circumstances.
Technical data
Operating voltage
AC 230 V (± 10 %)
Frequency
50 Hz
Power consumption (with no external load)
Max. 7 VA
External supply line fusing
Slow
-blow fuse max. 10 A
or
Circuit brea
ker max. 13 A
Characteristic B, C, D according to EN 60898
Clock reserve
Typically 72 hours
System limits (bus TP)
Limitation per
central apartment units
Limitations per room
Note *
Power