Wolf CGB-2 Series, Installation Instructions For Contractors

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24. Parameter description
In DHW mode, the pump runs at this set value. Independent of pump control
type set in HG37.
Parameter HG41
ZHP speed DHW
Factory setting: see table
Setting range: 15 to 100 %
Individual setting: _____
The header hysteresis regulates the header temperature within the set range by
switching the heat generator ON and OFF. The higher the ON/OFF temperature
differential, the higher the header temperature fluctuation around the set value,
resulting in longer heat generator runtimes, and vice-versa.
Parameter HG42
Hysteresis, header
Factory setting: see table
Setting range: 0 to 20 °C
Individual setting: _____
Parameter HG43 has two functions:
1. Triggering of a 100 % calibration (burner or IO electrode replacement)
2. Permanent raising or lowering of the IO default value after a 100 % calibration
has been completed.
Calling up HG43 results in an automatic 100 % calibration, which involves a
burner restart. When a 100 % calibration is requested, " 100 % calibration Cali
comp. OFF and Cali. active ON " is displayed.
The 100 % calibration is complete as soon as " 100 % calibration Cali comp.
ON and Cali. active ON "
a
ppears in HG parameter 43 on the display.
The IO default value is an operand for the electronic gas/air mixture and deter-
mines the CO
2
level. By reducing the IO default value, (HG43) the CO
2
value
can be lowered over the entire output range.
The default value should not be increased/reduced on newly installed applianc-
es or in the event of a burner or IO electrode replacement. In the first hours of
operation, the components are subject to ageing, which can temporarily affect
the CO
2
level. If the CO
2
value of the condensing boiler is outside the CO
2
set
range after approx. 1000 hours run, we recommend raising/lowering the default
value via the HG 43 parameter.
(CO
2
reduction = set positive numerical value under HG43; CO
2
increase = set
negative numerical value under HG43)
Parameter HG43
IO reductn, default value
Factory setting: see table
Setting range: -5 to 10
Individual setting:
_____
In standard control mode, the zero point specific to the gas valve is automati -
cally determined at minimum output and stored in the control unit. After a gas
valve replacement, set HG44 to the standard value.
Standard values: 14 kW = 25 %
20/24 kW = 29.3 %
Parameter HG44
GPV curves offset
(gas valve zero point)
Factory setting: see table
Setting range: 15 to 46.4 %
Individual setting: _____