enabled. Without room sensor the quick reduction switches the heater off
depending on the outside temperature and the building time constant
(prog.no. 6110) until the temperature has theoretically dropped to the re
duced target value or the frost protection value.
Tab.21 Duration of the quick reduction
Duration of the quick reduction for reduction by 2°C in hrs:
Outside temperature mixed:
Building time constant (configuration, prog.no. 6110)
0 hrs
2 hrs
5 hrs
10 hrs
15 hrs
20 hrs
50 hrs
15°C
0
3.1
7.7
15.3
23
10°C
0
1.3
3.3
6.7
10
13.4
5°C
0
0.9
2.1
4.3
6.4
8.6
21.5
0°C
0
0.6
1.6
3.2
4.7
6.3
15.8
-5°C
0
0.5
1.3
2.5
3.8
5
12.5
-10°C
0
0.4
1
2.1
3.1
4.1
10.3
-15°C
0
0.4
0.9
1.8
2.6
3.5
8.8
-20°C
0
0.3
0.8
1.5
2.3
3.1
7.7
Duration of the quick reduction for reduction by 4°C in hrs:
Outside temperature mixed:
Building time constant (configuration, prog.no. 6110)
0 hrs
2 hrs
5 hrs
10 hrs
15 hrs
20 hrs
50 hrs
15°C
0
9.7
24.1
10°C
0
3.1
7.7
15.3
23
5°C
0
1.9
4.7
9.3
14
18.6
0°C
0
1.3
3.3
6.7
10
13.4
-5°C
0
1
2.6
5.2
7.8
10.5
26,2
-10°C
0
0.9
2.1
4.3
6.4
8.6
21.5
-15°C
0
0.7
1.8
3.6
5.5
7.3
18.2
-20°C
0
0.6
1.6
3.2
4.7
6.3
15.8
For more information, see
Time constant building (6110), page 111
Optimum start control max (790, 1090, 1390) and Optimum
stop control max (791, 1091, 1391)
Xon Start time set forward
Xoff Stop time set forward
ZSP Time switching program
TRw Room temperature setpoint
TRx Room temperature actual value
The optimisation of the on/off switching times is a function of time and pos
sible with or without room unit. With a room unit the changeover of operat
ing level compared to the programmed time moves forward so that the
building dynamics (heat-up and cool-down times) are taken into account.
In this way the required temperature level is reached exactly at the pro
grammed time. If this is not the case (too early or too late) a new switching
time is calculated that is applied next time.
Without room sensor an advance time is calculated based on the outside
temperature and the building time constant (prog. no. 6110). The optimisa
tion time (advance) is limited here to a maximum value. By setting the opti
misation time = 0, the function is switched off.
Fig.24 Optimum start and stop control
RA-0000070
9 Settings
7658013 - 02 - 15092016
Paramount four 30 – 115 kW
87