Data Sheet for Product

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Siemens HVAC central apartment unit with consumption data acquisition QAX903 CE1N2741en
Building Technologies 2016-01-30
Specific functions to acquire and display consumption data
Integrating the consumption data interface WRI982 allows for displaying energy
consumption on the central apartment unit and sending it to a service provider via
web server OZW772.
Monthly and annual cutoff values are displayed and forwarded in addition to
current meter readings. A corresponding info page is maintained for each meter
type.
2 pulse and 3 M-bus meters can be connected to one WRI982 (a total of up to
5 meters).
What types and number of meters can be integrated in a QAX903 central apart-
ment unit?
4 heating and/or cooling meters
4 chilled water meters
4 hot water meters
3 electricity meters
3 gas meters
2 other meters (e.g. for steam or oil)
Consumption data
acquisition
Available meter types
and max. number