Wolf BML Operating Instructions Manual page 30

Integral action time for
cascade
LM101
Factory setting: 2 min.
Range: 0 - 25 min.
Supply air maximum limit
LM102
Factory setting: 50 °C
Range: 20 - 60 °C
Temperature - control
type
LM103
Factory setting:
Supply air temperature control
Damper lead time
LM114
Factory setting: 0 s
Range: 0 - 150 s
Night ventilation limit
LM130
Factory setting: 22 °C
Range: 10 - 30 °C
Night ventilation
start condition
LM131
Factory setting: 5 K
Range: 2 - 20 K
30
Parameters / Function description
The cascade integral action time determines how great the
time effect is on the set temperature for supply air due to a
control deviation in the room temperature.
If the integral action time is set low (high time effect), shorter
correction times result. However, this also means 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 supply air maximum limit determines the maximum
temperature at which supply air can be blown into the room.
If the differential in temperature between the set temperature
and the actual temperature is high, control based on room
temperature could lead to very warm air being conveyed into
the room. This high supply air temperature would cause the
air quality in the room to worsen. To prevent that, the supply
air temperature is limited to a maximum value in the case of
heating.
This parameter sets the type of temperature control.
- Auto
- Supply air temperature control
- Extract air:supply air cascade
For a detailed description of the control functions, see BML.
To prevent whistling noises occurring on the dampers when
the fan is switched on, the outside air dampers are opened
first, with the fans being switched on after this time (60 s) has
elapsed.
If night ventilation is activated (DEFAULT SETTING), this
parameter is used to determine the room temperature or
extract air temperature at which night ventilation starts or
stops (±1 K).
Night ventilation starts if the room or extract air temperature is
higher than the set value ± 1 K.
Night ventilation stops if the room or extract air temperature is
lower than the set value.
If night ventilation is activated (DEFAULT SETTING), this
parameter sets the outside temperature, relative to room
temperature, at which night ventilation starts.
Night ventilation starts when the outside temperature is lower
than the room temperature minus the "Night ventilation start
condition" parameter.
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