www.stiebel-eltron.com
LWZ 180 / LWZ 280 |
39
EN
GL
ISH
INSTALLATION
Settings
12. Settings
When you enter a four-digit code, additional actual values become
visible, which were hidden beforehand.
12.1 Parameters
Dis-
play
Description
Code
Unit Min.
Max.
Options
P1
Set room temperature
-
°C
5
28
P2
Intensive ventilation runtime -
min 1
240
P3
Bypass mode
-
0 | 1 | 2 | 3
P4
Reset filter
-
1 | 0
P5
Fan operating mode
A1
0 | 1
P6
Flow rate, stage 0
A1
m³/h 40
120
P7
Flow rate, stage 1
A1
m³/h 80
265
P8
Flow rate, stage 2
A1
m³/h 130 350
P9
Flow rate, stage 3
A1
m³/h 165 400
P10 Constant pressure, stage 0
A1
Pa
P11 Constant pressure, stage 1
A1
Pa
P12 Constant pressure, stage 2
A1
Pa
P13 Constant pressure, stage 3
A1
Pa
P14 Supply air flow rate offset
A1
P15 Humidity protection interval
A1
h
P16 Start-up time for humidity
measurement
A1
min
P17 Extract air humidity limit
A1
%
P18 Frost protection temperature A1
°C
P19 Filter change interval
A2
d
P20 Outdoor air filter limit value
A2
%
P21 Extract air filter limit value
A2
%
P22 Enable preheater
A1
0 | 1
P23 Frost protection mode
A1
0 | 2
P24 Bypass enable temperature
A1
°C
5
15
P25 Bypass blocking temperature A1
°C
5
15
P26 Bypass hysteresis
A1
K
0
5
P27 Temperature differential for
enabling the bypass
A1
°C
0
5
P70 Delete fault list
A1
0 | 1
P80 Day
-
1 - 7
P81 Time
-
00:00 23:59
P82 Illumination level
-
2
10
P83 Mode of backlighting
-
Auto | On |
Off
P84 Illumination duration
-
s
10
500
P85
Lower standard display
-
Off | Time |
Set room
tempera-
ture | Extract
air tempera-
ture | Extract
air humidity
The "service/fault" symbol appears when scrolling through the
parameter list for all parameters that are reserved for qualified
contractors and are only accessible by entering a code.
P5: Fan operating mode
Use this parameter to switch between flow rate control and con-
stant pressure control.
Options Effect
0
The appliance maintains a constant flow rate for both fans. The
appliance operates with set flow rates P6 to P9.
1
The appliance maintains a constant pressure at the extract air fan.
The appliance regulates the pressure at the extract air connector to
the set values saved in P10 to P13. The flow rate that is established
there is used as the set value for flow rate control of the supply
air fan. The supply air flow rate offset set in parameter P14 is also
taken into account.
P14: 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): 180 m³/h
- Offset : 45 m³/h
Stage
Set
flow
rate
Off-
set
Set flow
rate
+
Off-
set
Offset fac-
tor
Internal set flow rate
= Set flow rate
*
Off-
set factor
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
P22: Enable preheater
Options Effect
0
The internal preheater is completely deactivated.
1
The internal preheater is activated. In order to keep the heat ex-
changer free from ice, the preheater ensures a minimum supply
air temperature with reference to the frost protection temperature
adjustable in parameter P18.
While this parameter is being displayed or adjusted, the "frost
protection" symbol is shown on the display.
P23: Frost protection mode
Options Effect
0
At this setting, the appliance operates solely in frost protection
mode. The preheating coil control only measures the outside tem-
perature.
2
At this setting, the appliance operates in comfort mode. In addi-
tion to the outside temperature, the supply air temperature is also
measured. The preheating coil is controlled to ensure that the sup-
ply air temperature does not fall below the 16.5 °C specified in the
passive house criteria.
P24: Bypass enable temperature
To enable checking of the other parameters for the bypass, the
outdoor air temperature must be no less than the value set in
this parameter.
