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Siemens
RDG400 Basic Documentation
CE1P3182en
Building Technologies
2015-05-20
4.7.6
Single-duct with radiator
or floor heating
On single-duct applications with radiator or floor heating, the thermostat controls a
valve plus an electric heater. Parameter P01 is not available.
The output signal for the air flow can be limited to a minimum and maximum value
if required (see section 4.6 for details).
The air flow starts to rise when the acquired room temperature is above setpoint
plus dead zone.
The radiator receives an
ON
command when the acquired room temperature drops
below setpoint (= setpoint for radiator).
"Setpoint for radiator" is limited by parameter "Maximum heating setpoint" (P10).
The radiator sequence can also be used for floor heating.
The "Floor heating limitation function" is described on page 16.
On/Off radiator/floor heating
Modulating radiator/floor heating
Y
Output signal
TR
Room temperature
W
Effective setpoint Comfort
H
Heating sequence
C
Cooling sequence
YV
Volume flow rate
YR
Radiator/floor heating
XpH Proportional band heating
XpC Proportional band
cooling
Vmin Minimum volume output
Vmax Maximum volume output
SDH Switching Differential Heating
The diagrams show the PI controller's proportional part only.
Setting the sequence and the control outputs
Refer to section 4.5, 4.7.1 and 4.7.3 for details.
Single-duct with radiator
or floor heating
Note:
Floor heating
Sequences
Note:
