STIEBEL ELTRON LWZ 130 - Page 54

INSTALLATION
Settings
54 | LWZ 130 | LWZ 130 Enthalpie www.stiebel-eltron.com
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) m³/h 180
Offset m³/h 45
Stage Set flow
rate
Off-
set
Set flow
rate + off-
set
Offset fac-
tor
internal set flow
rate= set flow
rate* offset fac-
tor
0 50 50*1.25 = 62
1 130 130*1.25 = 162
2 180 45 180+45 = 225 225/180 = 1.25 180*1.25 = 225
3 235 235*1.25 = 294
 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".
 Heat recovery bypass
 Window contact mode (depending on unit)
Setting whether the window contact is relevant for the bypass
mode.
Parameter Effect
Without window
contact
The supply air fan is stopped independently of the win-
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
outdoor air temperature must be no less than the value set in
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.