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Quick setback
Optimum start / stop control
Optimum start control max
Optimum top control max
Siemens Switzerland Ltd
HVAC Products
Line no.
HC1
HC2
HC3P
780
1080 1380
During quick setback, the heating circuit pump is deactivated and, in the case of mixing
valve circuits, the mixing valve fully closed.
•
Function with room temperature sensor:
When using a room temperature sensor, the function keeps the heating switched off
until the room temperature has dropped to the level of the Reduced setpoint or the frost
level.
When the room temperature has fallen to the Reduced level or frost level, the heating
circuit pump will be activated and the mixing valve will be released.
•
Function without room temperature sensor:
Quick setback switches the heating off for a certain period of time, depending on the
outside temperature and the building time constant.
Duration of quick setback when Comfort setpoint minus Reduced setpoint = 2 °C
(e.g. Comfort setpoint = 20 °C and Reduced setpoint =18 °C)
Outside
temperature
0
composite:
15 °C
0
10 °C
0
5 °C
0
0 °C
0
-5 °C
0
-10 °C
0
-15 °C
0
-20 °C
0
•
Quick setback is possible with or without room temperature sensor
Line no.
HC1
HC2
HCP
790
1090
1390
791
1091
1391
The change from one temperature level to the other is optimized in a way that the
Comfort setpoint is reached at the respective switching times.
The change from one temperature level to the other is optimized in a way that the
Comfort setpoint minus 1/4 °C is reached at the respective switching times.
User manual RVS61.843, RVS41.813
6 The settings in detail
Operating line
Quick setback
Off.
Down to reduced setpoint
Down to frost prot setpoint
Building time constant:
2
5
10
3.1
7.7
15.3
1.3
3.3
6.7
0.9
2.1
4.3
0.6
1.6
3.2
0.5
1.3
2.5
0.4
1.0
2.1
0.4
0.9
1.8
0.3
0.8
1.5
Duration of quick setback in hours
Operating line
Optimum start control max
Optimum top control max
15
20
50
23
30.6
76.6
10
13.4
33.5
6.4
8.6
21.5
4.7
6.3
15.8
3.8
5.0
12.5
3.1
4.1
10.3
2.6
3.5
8.8
2.3
3.1
7.7
91/258
CE1U2355en_02
28. September 2009
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