Passive Cooling; P3 : Passive Cooling Operating Mode; P28 : Enable Fan; P24 : Passive Cooling Release Temperature - STIEBEL ELTRON LWZ 130 Bedienung Und Installation

OPERATION
Settings
„P3 : Passive cooling operating mode „
Effect
0 Passive cooling is permanently disabled. Air flows through the heat ex-
changer.
1 Passive cooling is enabled. The appliance checks whether a window con-
tact is connected and activated at X18
2 Passive cooling operates with summer day detection. This option is set in
the delivered condition.
3 Passive cooling operates subject to the extract air temperature.
Passive cooling is only activated when an opened window is de-
tected.
Note
The qualified contractor can set the parameters men-
tioned in the description of this parameter.

P24 : Passive cooling release temperature

P25 : Passive cooling blocking temperature

P26 : Passive cooling hysteresis

P27 : Temperature differential for enabling passive cooling

P3 = 2 : Passive cooling with summer day detection
In order for passive cooling to be enabled, the following must
apply for 2 hours: Outdoor air temperature > Set room temper-
ature + P27
If all of the following conditions are met, passive cooling switches
the appliance to extract air mode.
- Outdoor air temperature < Extract air temp. - P26
- Extract air temp. > Set room temperature
If one of the following conditions is met, passive cooling termi-
nates extract air mode.
- Outdoor air temperature < P25
- Outdoor air temperature > Extract air temp. - P26
- Extract air temp. < Set room temperature
P3 = 3 : Passive cooling subject to extract air temperature
In order for passive cooling to be enabled, the following must
apply for 2 hours: Extract air temp. > Set room temperature + P27
This delayed activation is intended to prevent cooling down in
spring and autumn.
If all of the following conditions are met, passive cooling switches
the appliance to extract air mode.
- Outdoor air temperature < Extract air temp. - P26
- Extract air temp. > Set room temperature
If one of the following conditions is met, passive cooling termi-
nates extract air mode.
- Outdoor air temperature < P25
- Outdoor air temperature > Extract air temp. - P26
- Extract air temp. < Set room temperature
„P4 : Reset filter
„
f Set this parameter to 1 after changing the filters. The appli- f
ance resets the filter runtime to 0. This parameter is auto-
matically reset to 0.
34 | LWZ 130
„P28 : Enable fan „
You can switch off the fans at any time via the programming unit
menu, e.g. to deactivate ventilation if there is a fire.
Effect
OFF The fans are deactivated. "OFF" and the fan icon flash on the display.
On The fans are enabled.
„P80 : Day „
1 Monday
2 Tuesday
3 Wednesday
4 Thursday
5 Friday
6 Saturday
7 Sunday
„P83 : Mode of backlighting
„
Effect
On Backlighting switched on
OFF Backlighting switched off
Auto If no user action occurs within the time selected in the illumination du-
ration parameter, the display backlighting switches off and the standard
display appears.
„P84 : Illumination duration „
If no user action occurs within the time selected in the illumination
duration parameter, the display backlighting switches off and the
standard display appears.
„P85 : Lower standard display
„
Use this parameter to define what is displayed in the lower section
of the standard display. If the appliance detects a fault, the fault is
indicated in the lower section of the standard display.

4.5.2 Actual values

Description
I1 Passive cooling status
I2 Extract air temperature
I3 Relative humidity of extract air
I4 Filter service life
I5 Appliance software version
I6 Unit software patch
I7 Terminal device serial number
I8 Programming unit software version
I70-79 Fault memory
Faults detected by the appliance are stored in actual values I70
to I79.
The latest fault is stored in I70; the oldest in I79. If no faults are
entered, dashes are shown. The latest fault is also shown in the
lower section of the standard display. Possible faults are listed for
qualified contractors in the "Troubleshooting" chapter.
Unit
°C
%
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