protection setpoint, the heating circuit pump starts again and the mixing
valve is 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 reduced target value or the frost protection value.
Tab.14 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
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 program
TRw Room temperature setpoint
TRx Room temperature actual value
The optimisation of the on/off switching times is a function of time and
possible with or without room unit. With a room unit the changeover of
operating 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 programmed 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
optimisation time (advance) is limited here to a maximum value. By setting
the optimisation time = 0, the function is switched off.
Reduced setp increase start (800, 1090, 1390) and Reduced
setp increase end (801, 1101, 1401)
Fig.27
Optimum start and stop control
RA-0000070
9 Settings
90
7703301 - 01 - 16072018