Wolf BML Operating Instructions Manual page 29

Differential for heating
LM021
Factory setting: 1
Range: 1 - 10 K
Room frost protection
LM023
Factory setting: ON
Range: ON/OFF
Room frost protection
temperature
LM024
Factory setting: 5
Range: 0 - 30 °C
Fan speed for
Econ.operation
LM060
Factory setting: 70 %
Range: 40 - 100 %
P component for
heating circuit mixer
LM080
Factory setting: 12
Range: 5 - 20
Integral action time for
heating circuit mixer
LM081
Factory setting: 2 min.
Range: 0 - 25 min.
Cascade effect
LM100
Factory setting: 2
Range: 0 - 20
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Parameters / Function description
This parameter defines the outside temperature, relative to
the set room temperature, at which the ventilation unit stops.
Example:
Set room temperature 20 °C, parameter LM021 set to 5.
If the outside temperature is > 25 °C the ventilation unit
will be switched off. At 1 kelvin below that, the unit will be
enabled again.
Activating this parameter allows the system to be switched
on when the room temperature falls below the room frost
protection limit.
If the room temperature falls below the set value, the reheater
and the fan are activated. Once the temperature rises 2 K
above the set temperature, the system stops again.
The fan speed can be preselected manually.
When Economy operation is active, the fan is operated at the
speed preselected here. The set speed applies to backup
mode, night ventilation, summer mode and peak ventilation.
The P component for the heating circuit mixer (HR)
determines how sharply the output signal of the heating
circuit mixer is modified in proportion to a control deviation.
If the P component is set low, the control unit responds more
quickly.
If the P component is set high, the control unit responds more
slowly.
The integral action time for the heating circuit mixer (HR)
determines how great the time effect is on the output signal of
the heating circuit mixer due to a control deviation.
If the integral action time is set low (high time effect), short
correction times result. However, so do greater fluctuations
around the set value. If the integral action time is set high,
longer correction times result. This also means lesser
fluctuations around the set value.
The cascade effect determines how sharply the set
temperature for supply air is modified in proportion to a
control deviation in the room temperature.
If the P component is set low (low gain), longer correction
times result, whilst fluctuations around the set value will be
minor. If the P component is set high, shorter correction times
result. However, so do greater fluctuations around the set
value.
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