User Manual

Functions
KNX communications
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Geographical zone
(space zone)
(Apartment . Room . Subzone)
Apartment = ---, 1...126
Room = ---, 1...63
Subzone = fix 1
Zone where an RDG2..KN KNX room thermostat is physically located.
Other room-specific devices may also be located in this zone.
Information exchanged in this zone is related specifically to the device like
operating mode, setpoints, room temperature, and so on.
The designations "Apartment", "Room" and "Subzone" are not necessarily
literal. For example, Apartment can be used to refer to a group of rooms,
floor or section of a building. "Room", however, really does refer to a room.
Subzone is not used for HVAC devices. It is more relevant to other
disciplines, such as lighting. Subzone is fixed at "1" and not displayed.
The time switch information is expected from the same zone where the
thermostat is located (Residential).
If no time switch information is received from the same zone, the
thermostat uses the information received from the same apartment but with
room "1" A.1.1 (Office).
Example:
Commercial building
In a commercial building, the time switch information is sent by the
RMB975 central control unit. The zones are divided into so called "Room
groups" (for example, 1...4), where each "Room group" can have an
individual schedule. A room thermostat in the same "Room group" must
have the same Apartment Address.
Legend:
D = device address (P900)
G = geographical zone (P901, P902) (Apartment.Room.Subzone)
Heat distribution zone heating
coil
Zone = ---, 1...31
Information related specifically to the hot water system in heating coils is
exchanged within this zone. The zone also includes a Synco device to
process the information (for example, RMH7xx or RMU7xx with
changeover).
Heat distribution zone heating
surface (radiator)
Zone = ---, 1...31
Information related specifically to the hot water system of a radiator is
exchanged within this zone (for example, heating demand). This zone also
includes a Synco device to process the information (for example, RMH7xx
or RMB795B).
Refrigeration distribution zone
cooling coil
Zone = ---, 1...31
Information related specifically to the chilled water system is exchanged
within this zone (for example, cooling demand). This zone also includes a
Synco device to process the information (for example, RMU7xx).
Outside temperature zone
Zone
Outside temperature received in outside temperature zone 31 can be
displayed on the room thermostat when commissioned accordingly
(P009 = 2).