User Manual

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Siemens Schweiz AG
Industry Sector – Building Technologies Division
Gubelstraße 22, CH-6300 Zug, Switzerland
Press Relations: Petra Krokowski
Phone: [phone]
E-mail: [e-mail]
Siemens AG
Industry Sector – Building Technologies Division
Friesstraße 20, 60388 Frankfurt
Individual room control using pre-tested macros
As was the case for the concrete core temperature control system, IPM used pre-tested macros
from the Desigo program, which can be customized as needed, for individual room control. To
streamline assembly and deployment, nine room types were defined for a LON-based room
automation system. In addition to demand-based heating, cooling and ventilation, most RXC room
controllers also handle lighting and sun protection. Most office lighting is overridden by occupancy
detectors and photoelectric switches; this means that lights are turned off automatically if a room is
unoccupied or if there is sufficient daylight.
The biggest challenge to be addressed in the room automation concept was how to topologically
interconnect the approximately 430 individual room controllers over a LON network. The ability to
configure rooms flexibly, expressly requested by PUMA, made matters even more difficult,
especially since the connection options between floor and ceiling are very limited and mostly
restricted to the shaft heads. In basic terms, two window elements with heating and cooling unit,
sun protection blinds and light strip form an ERR grid; one or more ERR grids can be combined on
one operating unit. All hallway lighting is controlled by timer programs that can be overridden if
needed, for example by office cleaning crews.
Throw distance adjustment in multimedia hall
Separate central air-conditioning systems are used to ventilate and condition the Retail building
with its PUMA Store, merchandising center and restaurant as well as the Brand Center with its
multimedia hall and multiple meeting rooms. One special feature of the PUMA headquarters is the
ability to adjust the throw distance of the air outlets in the multimedia hall. If cooling is needed, the
conditioned air is diffused; if heating is needed, the warm air is blown straight down from the
ceiling. Because of the high internal thermal load in the hall, the basic ventilation system is
enhanced by four recirculating air cooling units. Multiple scenarios for event-appropriate heating
and cooling are stored in the hall's control system to allow for a variety of applications. To ensure
optimal HVAC control performance for the hall, which has a capacity of 1,500 people, IPM opted for
four RF sensors from EnOcean. They were installed after the interior of the hall had been
completely finished.
Data coupling via BACnet and Modbus
The basic principle of the control concept is to supply heating and cooling only if actually needed—
and to transport only those volumes over the respective duct networks that are required to avoid a
loss of comfort for the consumer. All heat consumers are recorded and controlled via Desigo PX
stations. Predefined and calculated setpoints are forwarded to the corresponding pre-control group
where they are converted into matching “demand signals”. The recirculating pumps for the heating