Wolf COB Technical Manual And Installation Instructions page 38

Maximum boiler water temperature
TK-max.
Parameters HG22
HG22
80
Factory setting: 80 °C
Setting range: 50 to 90°C
Excess boiler water temperature
during cylinder heating
Parameters HG25
HG25
10
Factory setting: 10 K
Setting range: 0 to 40 K
Burner operating mode
Parameter HG28
HG28
2
Factory setting: 2
Setting range: 1 to 5
Blocking time burner stage 2
Parameter HG31
HG 31
10
Factory setting: 10 min
Setting range: 0 to 40 min
38
23 Contractor level parameters
The control unit is equipped with an electronic boiler temperature controller which has an
adjustable max. off temperature (max. boiler temperature). The burner is switched off if
this temperature is exceeded. The burner will restart when the boiler water temperature
has fallen by as much as the burner switching differential.
If the boiler water temperature exceeds 95 °C (possible effect of reheating), the boiler
circuit pump and cylinder primary pump (if installed) will also be started in "summer
mode". These pumps are stopped again when the boiler water temperature falls below
92 °C. This prevents the boiler overheating.
The excess temperature differential between the cylinder temperature and the boiler
water temperature during cylinder heating is selected with parameter HG25. The boiler
water temperature continues to be limited by the maximum boiler water temperature
(parameter HG22). This ensures that, even in spring and autumn, the boiler water
temperature is higher than the cylinder temperature, thereby ensuring short heating
times.
You can select any burner operating mode. Control unit is set at the factory for two-
stage burner operation.
Setting "1": single stage burner operation, stage 1
Setting "2": two-stage burner operation, stages 1 + 2
Setting "3": Burner is single stage for cylinder heating
Burner is double stage for heating mode
Setting "4": Burner is single stage for heating mode
Burner is double stage for cylinder heating
Setting "5": Burner is double stage for heating mode, anti-cycling
according to the parameter HG09
Burner is double stage for cylinder heating. For cylinder
heating, the burner is locked for 4 min after every burner
shutdown.
Burner stage 2 is started when there is stage 2 demand and after the blocking period
has expired (factory setting 10 min.). It is stopped once a temperature of approx. 5 °C
above the set value has been reached. Once the stage 2 has been enabled, it will be
started as soon as the set temperature has been reached or is no longer achieved.
Enabling is removed when burner stage 1 is shut down.
During cylinder heating and emissions test mode, this parameter is disabled.
Burner Burner stage 1
OFF
Set val.
Blocking period, factory
Burner stage 2
Demand
Stage 2
setting 10 min
Burner Burner Burner Burner
stage 1 stage 2 stage 1 OFF
3062547_201802
Time