Wolf CGB-75 - Adjusting the Modulating Pump (Accessory)

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20.Adjustingthemodulatingpump(accessory)
Inheatingmode:
The heating circuit pump (accessory) modulates in proportion to the burner output. This means at maximum burner output, the
pump operates at the maximum pump speed for heating mode. At minimum burner output, the pump operates at the minimum
pump speed for heating mode. In other words, the burner output and pump speed are regulated subject to the required heat load.
Modulating the pump reduces the power consumption.
In DHW mode:
The heating circuit pump will not modulate, but operates constantly at the selected pump speed.
Instandbymode:
The heating circuit pump will not modulate, but operates constantly at the selected pump speed.
Standby mode 20%
Settinglimits:
The speed limits for heating mode can be changed with the BM programming unit.
Solution:
The settings in column 1 apply to control accessories ART, AWT
The settings in column 2 apply to Wolf control systems with BM programming unit
1 2 Parameter Unit Factory
setting
min Max.
GB16 HG16 Minimumheatingcircuitpumprate % 20 20 100
GB 17 HG17 Heatingcircuitpumpoutput,maximum
This parameter must be set at least 5% higher than the
parameter
Minimum heating circuit pump output
% 100 20 100
Fortheminimumpumpspeedforheatingmode,onlysettingsinaccordancewiththistablearepermissible.
Otherwise,thereisariskthatthepumpwillnotstart.
Inaddition,the"Max.pumpspeedforheatingmode"mustbeatleast5%higherthanthe"Minimumpumpspeed
forheatingmode",otherwisethepumpwouldrunat100%.
Note
Problem Troubleshooting
Individual radiators do not heat up properly. Createhydronicbalancing,i.e.reducetheowrateof
hotter radiators
In the spring and autumn (average outside temperature),
the required room temperature is not achieved.
Increase the set room temperature at the controller
e.g. from 20 °C to 25 °C
When the outside temperature is extremely low, the selected
room temperature is not achieved.
Select a steeper heating curve at the controller
e.g. from 1.0 to 1.2