4.7.6Single duct with radiator or floor heating
In single duct applications with radiator or floor heating, the thermostat controls a valve plus an auxiliary electrical 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 "additional features").
The air flow starts to rise when the acquired room temperature is above "setpoint" + "dead zone".
The radiator receives an ON command when the acquired room temperature drops below “setpoint” – “dead zone” (= “setpoint for radiator”).
Note: “Setpoint for radiator” is limited by parameter “Maximum heating setpoint” (P10).
Floor heating | The radiator sequence can also be used for floor heating. |
| The "Floor heating limitation function" is described on page 15. |
Sequences | ON/OFF radiator / floor heating |
Y |
|
XpC | C |
100% |
|
Vmax | max |
| |
YV |
|
Vmin |
|
min |
|
0% |
|
TR [°C]
Y
SDH
ON
YR
Modulating radiator / floor heating
Y | XpC |
| |
100% | C | ||
| |||
|
| ||
Vmax |
| max | |
|
| ||
Vmin | YV |
| |
min |
| ||
|
| ||
0% | TR [°C] | ||
| |||
Y
XpH |
100% |
YR |
OFF
W
dz | TR [°C] |
|
0% |
|
| W |
|
|
|
| dz |
| TR [°C] |
Y | Output signal |
TR | Room temperature |
WEffective 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 |
Note: The diagrams show the PI controller's proportional part only.
Setting the sequence and the control outputs
Refer to sections 4.5 (applications), 4.7.1 (sequences) and 4.7.3 (outputs).
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Siemens | RDG100, RDG100T, RDG110, RDG140, RDG160 Basic Documentation | CE1P3182en |
Building Technologies | Functions | 28 May 2009 |