Siemens RDF800KN Series User Manual

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Siemens RDF800KN.., RDF800KN/VB, RDD810KN/NF Basic documentation CE1P3174en
Smart Infrastructure 2020-02-21
With 2-pipe applications, the control sequence state is determined by the
application mode (see section 3.6.3) and by the state of the heating/cooling
changeover signal (using the local sensor or the bus), or fixed according to the
selected control sequence (P01 = heating (0)/cooling (1)).
Application mode
(using bus)
State changeover/continuous
heating or cooling
Control sequence state
Auto (0)
Heating Heating
Cooling Cooling
Heat (1), (2), (8) Heating Heating
Cooling Heating
Cool (3), (5)
Heating
Cooling
Cooling Cooling
Night purge (4),
fan only (9)
Heating Heating
Cooling Cooling
With 4-pipe, 2-pipe with electric heater, and 2-pipe with radiator applications, the
control sequence state depends on the application mode and the heating/cooling
demand.
Application mode
(
using
the
bus)
Heating/cooling demand Control sequence state
Auto (0)
Heating Heating
No demand Heating/cooling depending on
the last active sequence
Cooling Cooling
Heat (1), (2), (8)
Heating Heating
No demand
Heating
Cooling Heating
Cool (3), (5)
Heating
Cooling
No demand
Cooling
Cooling Cooling
Night purge (4),
Fan only (9)
No room temperature control
active
Heating/cooling depending on
the last active sequence
The following diagram shows the value of the output as a function of the room
temperature for a heating and cooling system:
0
TR
Wheat Wcool
100%
0 = Cool
1 = Heat
3171D01
Wheat = current heating setpoint
Wcool = current cooling setpoint
Heating OR cooling
Heating AND cooling

Siemens RDF800KN Series Specifications

General

Brand	Siemens
Model	RDF800KN Series
Category	Thermostat
Language	English