Siemens RDG100KN Basic Documentation page 48

Heating and cooling
Heating or cooling with
the master / slave
function (RDG160KN
SW V2.04)
48 / 132
Siemens
Building Technologies
With a 4-pipe, 2-pipe with electric heater, and 2-pipe with radiator application, the
control sequence state is based on the application mode and heating/cooling
demand.
Application Heating/cooling demand
mode (via bus)
Heating
No demand
Auto (0)
Cooling
Heating
Heat (1), (2), (8) No demand
Cooling
Heating
Cool (3), (5) No demand
Cooling
Night purge (4), No temperature control active
Fan only (9)
The value of the control output as a function of the room temperature is illustrated
in the following diagram for a heating and cooling system:
1 = Heat
0 = Cool
100%
0
Wheat
The KNX object [48] "Effective application mode" on the master thermostat can be
bound to the KNX object [31] application mode of the slaves to control the
sequence, either heating or cooling, of all thermostats.
RDG100KN, RDG160KN, RDG165KN Basic Documentation
Wheat = current heating setpoint
Wcool = current cooling setpoint
TR
Wcool
TR
Control sequence state
(ACS diagnostic value)
Heating
Heating/cooling depending on
last active sequence
Cooling
Heating
Heating
Heating
Cooling
Cooling
Cooling
Heating/cooling based on last
active sequence
= room temperature
CE1P3191en
2018-07-03