STIEBEL ELTRON LWZ 130 Bedienung Und Installation Seite 54

INSTALLATIoN
Settings
Note
If you change over the "Fan control" setting, the unit re-
starts.
  Air flow rate
  Supply air flow rate offset
Use this parameter to adjust the supply air flow rate during com-
missioning. The offset refers to standard ventilation and is con-
verted internally as a percentage for the other fan stages.
Example
Nominal flow rate (stage 2)
Offset
Stage Set flow off- Set flow
rate set rate + off-
set
0 50
1 130
2 180 45 180+45 = 225 225/180 = 1.25 180*1.25 = 225
3 235
  Humidity prot.
  Enable humidity control
With humidity-dependent flow rate control, the air flow rate is
increased or decreased depending on the humidity level.
Parameter Effect
Off inactive
On active
  Humidity prot. interval
If you set fan stage 0, the appliance switches to a 24 hour dormant
phase. Only after this will humidity protection control start.
The unit measures the humidity of the extract air for the time set
for "Humidity capture delay". The unit compares the last meas-
ured value with the limit value set for "Humidity threshold". If
the humidity threshold is exceeded, the unit starts to ventilate.
If the humidity threshold is undershot again, the unit terminates
ventilation. At this point, the Humidity prot. intervalstarts again,
at the end of which the moisture is measured.
  Humidity capture delay
The unit measures the humidity of the extract air for the time set
for "Humidity capture delay". The unit compares the last measured
value with the limit value set for "Humidity threshold".
54 | LWZ 130 | LWZ 130 Enthalpie
m³/h
m³/h
offset fac- internal set flow
tor rate = set flow
rate * offset fac-
tor
50*1.25 = 62
130*1.25 = 162
235*1.25 = 294
  Heat recovery bypass
Window contact mode (depending on unit)
 
Setting whether the window contact is relevant for the bypass
mode.
Parameter Effect
Without window The supply air fan is stopped independently of the win-
contact dow contact.
With window contact The window contact is used to determine whether the
appliance stops the supply air fan.
  Temperature to enable heat recovery bypass
To enable checking of the other parameters for bypass mode, the
180
outdoor air temperature must be no less than the value set in
45
this parameter.
Temperature to block heat recovery bypass
 
If the outdoor air temperature falls below this blocking tempera-
ture, bypass mode is disabled.
  Hysteresis for heat recovery bypass
To make cooling possible, the outdoor air temperature must be
cooler than the extract air temperature by the value set in this
parameter.
  Temp. differential for heat recovery bypass
Use this parameter to define the temperature differential that must
be exceeded for bypass mode to be enabled. For bypass mode to
be enabled, the following condition must be met for 60 minutes:
If Operating mode heat recovery bypass: Outdoor air routing au-
tomatic
- Set room temperature + Temp. differential for heat recovery
bypass < Outdoor air temp.
If Operating mode heat recovery bypass: Extract air routing autom.
- Set room temperature + Temp. differential for heat recovery
bypass < Extract air temp.
  Frost protection
  Temp. to enable frost protection
The unit only activates frost protection if the outdoor air temper-
ature drops to the value that can be set in this parameter.
Enable preheating
 
Parameter Effect
Off The internal preheater is completely deactivated.
On The internal preheater is activated. To keep the heat ex-
changer free from ice, preheating ensures a minimum
supply air temperature with reference to the temperature,
which can be set in the "Frost protection temp." parameter.
While this parameter is being displayed or adjusted, the "frost
protection" symbol is shown on the display.
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