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24. Parameter description
The burner switching hysteresis regulates the boiler water temperature within
the set range by starting/stopping the burner. The higher the set start/stop
temperature differential, the greater the fluctuation in boiler water temperature
around the set value with correspondingly longer burner runtimes, and vice
versa. Longer burner runtimes protect the environment and extend the service
life of wearing parts.
Parameter HG01
Burner switching hysteresis
Factory setting: See table
Setting range: 7 to 30 °C
Individual setting:
_____
The setting for minimum burner output (minimum appliance load) is applicable
to all operating modes. This percentage value corresponds approximately to
the real appliance output.
This setting may be modified only by qualified personnel, as faults may oth
-
erwise result.
Parameter HG02
Lower burner output
Factory setting: See table
Setting range: 1 to 100 %
Individual setting:
_____
The setting for the maximum burner output in DHW mode (maximum appliance
load). Applies to cylinder heating and combi mode. This percentage value
corresponds approximately to the real appliance output.
Parameter HG03
Upper burner output DHW
Factory setting: See table
Setting range: 1 to 100 %
Individual setting:
_____
The setting for the maximum burner output in heating mode (maximum appli-
ance load). Applies to heating mode, cascade, BMS and emissions test. This
percentage value corresponds approximately to the real appliance output.
Parameter HG04
Upper burner output htg
Factory setting: See table
Setting range: 1 to 100 %
Individual setting:
_____
Fig.:
Time curve of the dynamic burner switching hysteresis for a user-defined burner
switching hysteresis of 15 °C and a selected hysteresis time (parameter HG33)
of 10 minutes. After expiry of the hysteresis time, the burner switches off at the
minimum switching hysteresis (parameter HG60).
Burner runtime (min.)
Set switching hysteresis 15 °C
Hysteresis time
10 minutes
7
10
15
20
1
2
3
4
5
6
7
8
9
10
Minimum switching hysteresis 7 °C
HG01
HG60
HG33
Switching hysteresis (°C)
