This is a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240 Hirschau (www.conrad.com). All rights
including translation reserved. Reproduction by any method, e.g. photocopy, microfilming, or the capture in electronic data
processing systems require the prior written approval by the editor. Reprinting, also in part, is prohibited. This publication
represent the technical status at the time of printing.
Copyright 2021 by Conrad Electronic SE. *2250409_v5_0121_02_dh_m_en
Description
Settings / defaults
A3
Keypad lock
Settings:
0 = All buttons except the power
button will be locked; 1 = All
buttons locked
Default: 0
A4
Behaviour after power
failure
Settings:
0 = Return to previous function; 1 = Power OFF; 2 = Power ON
Default: 0
A5
Backlight time
Settings: 5 to 30 secs; Default: 20 secs
A6
Weekly program
settings
The correct weekday must be set for the program to coincide with the
weekend. See section "Operation" → "Set time and weekday".
• Settings: 0 = 5 days / 2 days, 1 = 6 days / 1 day, 2 = 7 days
• Default: 0 = 5 days (Mon-Fri) / 2 days (Sat/Sun).
A7
Min. temperature.
Set the lowest selectable temperature.
Setting range: 1 to 10 °C; Default: 5 °C
A8
Max. temperature
Set the max. selectable temperature.
Setting range: 20 to 70 °C; Default: 35 °C
A9
Low temperature
protection
Frost protection: The output is activated if the temperature measured
by the sensor falls below the value set here.
• Setting range: 1 to 10 °C; Default: 5 °C
• Advanced setting:
- N1 or N3 (internal sensor)
- N2 (external sensor)
• Cancel setting: Press
until "--" shows on the display.
AA
High temperature
protection (external
sensor only)
It is to prevent the floor temperature from getting too high, for example.
If the window is open and the room temperature cannot heat up but
the floor heating is working and increasing to compensate.
• Advanced setting: N3 only
• Settings range: 20 to 70 °C; Default: 45 °C
• Cancel setting Press
until "--" shows on the display.
Example: If set to 50 °C and the external (floor) sensor detects 50 °C,
the thermostat will switch the output off.
AB
High temperature
protection / difference
setting (external
sensor)
Setting range: 1 to 9 °C; Default: 2 °C
Example: "AA" limit set to 45°C, and "AB" is set to 2 °C. If the
temperature rises to 45°C the output is switched off. If the temperature
drops to 43°C the output is switched on.This only works if the indoor
temperature is lower than set temperature.
AC
Ventilation mode
(open window)
If this setting is active, the thermostat will detect if a window is open
and switch the output (heater) off.
• Setting range: 10 - 20 °C, when display is / Default: OFF "--".
• Cancel Setting: Press
until "--" shows on the display.
AD
Ventilation mode
working time
Setting range: 10 - 20 minutes; Default: 10 mins
AE
Reset all settings to
defaults
Press and hold OK for approx. 3 - 5 secs until all segments show on
the display. The power will turn off when all settings have been reset.
b) Advanced
1. Press to turn the power OFF.
2. Press and hold for approx. 3 - 5 secs to enter advanced settings mode.
- Press to toggle through settings "BN" → "BC" → "BO".
- Press / to adjust values.
3. Settings will be saved if no buttons are pressed for approx. 10 sec.
Description
Settings / defaults
BN
Sensor selection
Settings:
• N1: Internal sensor controls the temperature
.
• N2: External sensor controls the temperature.
• N3: Internal sensor controls the temperature. When N3 is enabled, the
external sensor is used as the limiting sensor.
For all of the above, if the maximum temperature is exceeded,
the output is switched off.
Default: N1
BC
Descaling
Settings: 0 = closed, 1 = open; Default: 0 (closed)
These settings are not applicable to this thermostat (Item no.
2250409). Changing these settings will have no effect.
BO
Program data
Cannot be changed.
Error Codes
An error code will show if there is a problem with the internal or external sensor. When this
happens the thermostat will stop heating until the cause of the error is removed.
Code
Description
Suggestion
E1
Internal sensor error
• Turn the power off and contact technical support service or
other technical personnel.
E2
External sensor error
• Check the external sensor connection.
• Turn the power off and contact technical support service or
other technical personnel.
Care and cleaning
• The product is maintenance free.
• Use a dry, soft, lint-free cloth to wipe the panel. Do not use aggressive cleaning agents, as
these can cause discolouration.
Activate the keypad lock when wiping the front panel. Accidentally pressing the sen-
sor keys can cause unintended settings.
Disposal
Electronic devices are recyclable waste and must not be disposed of in the house-
hold waste. At the end of its service life, dispose of the product in accordance with
applicable regulatory guidelines.
You thus fulfill your statutory obligations and contribute to the protection of the envi-
ronment.
Technical data
a) General
Input voltage / current ................... 90 - 240 V/AC, 50/60 Hz
Max. switching power ................... 3000 W (resistive load)
2000 W (inductive load)
Contact load capacity ................... 16 A, 250 V
Memory backup ............................ Stored on non-removable capacitor
Time: approx. 7 days
Settings: < 10 years
Surface mounting ......................... Back box sizes: 60 mm, 80 mm
Display accuracy .......................... 0.5 ºC
Sensor .......................................... 1x internal, 1x external (probe)
External sensor (probe) ................ NTC (10 k) 1 %
Ingress protection ......................... IP20
Display size (W x H) ..................... 63.8 x 51.6 mm
Operating/Storage conditions ....... 1 to 70 ºC, <85 % RH (non-condensing)
Probe wire length .......................... 2.5 m
Dimensions (W x H x D) ............... 86 x 86 x 40 mm
Weight .......................................... 170 g
