Significantly better than analog bimetallic thermostats

Building: Reihenmittelhaus built in 2010 with underfloor heating + gas boiler + room thermostat from "Legend" (bimetal / Analog)
Target: constant room temperature of 22 ° C
In the previous room thermostat could only very inaccurately set the temperature. The scale went from 10 ° C - 30 ° C. We clearly heard a crack, if you lower the actual room temperature or exceeded. Between the upper and lower switch (clicking noise) there was clearly room for maneuver. In practice, it was so that we managed that the thermostat abschaltete when exceeding 22 ° C. The inertia of the underfloor heating, the room heated up to 23 ° C. Thereafter, the ambient temperature fell to about 0.1 ° C per hour. The thermostat turned even at below 21 ° C, an unrecoverable. Since we did not want that the space continues to cool, we've turned up again manually. Then it's too hot and you have to turn down manually. This game is annoying but not a solution.

Who knows this problem, has a great and inexpensive solution with this product.

The delivery came within 48 hours. It was an English and German manual with (a double-sided A4 sheet).

But how to connect?
I have 5 wires
* Blue
* Brown
* Black (Phase)
* Gray (phase)
* Yellow-green

I connected it as follows:
N = Neutral line = Blue
L = Phase = Black
L1 = servomotor = Brown
First find by the phase tester line that is energized. Before connecting the backup must be taken!

There are several configuration options, including I have set the following:
* Display of the room temperature (actual temperature) aligned with my existing thermometer. (0.1 ° C increments)
Put on permanent display * Lighting (Alternatively, it may be switched off after 5 seconds, which probably would be useful in the bedroom). But to play around it gets better if the screen is permanently illuminated. Later, I'll turn it off.
* Switching can to 0.5 ° C (smallest value) can be set, ie turn off at 20.0 ° C and switch on at 21.5 ° C again.
* Manual mode is set, ie below no clock icon should appear.

The display shows:
* In the middle of big and fat the current room temperature (actual)
* Among slightly smaller the desired room temperature (target) and also alternate time.
* The desired room temperature can be divided into 0.5 ° C - Set steps.
* The thermometer (actual) is very sensitive, which I actually find really good. When I go into the living room from the hallway (cooler), then the temperature display changes alone already by the draft of the door

Whether the target is a constant room temperature can be realized, I will be able to report in a few days.

I have ordered me immediately in the same night that more room thermostats. Strong buy recommendation at this time.

05/01/2015 - Addendum

For those lacking a Bedieungsanleitung, I have written down the main points.
All without Gwähr and use on onw risk. (Whoever finds typos, you can keep happy :))

Operating Instructions Digital Touch Screen Room Thermostat

(No guarantee, use at your own risk)

The room thermostat is an electronic two-position controller in an elegant design for installation in a flush-mounted socket. These are suitable for controlling actuators in the warm water underfloor heating or electric underfloor heating and Bodentemperiersystemen. The controller measures the internal or external temperature sensor the room temperature or the ground temperature and closes at falling below the set point temperature the heating contact. The clear LCD display allows for easy creation of the weekly program. The setpoint is in day and night mode adjustable and can be further divided in the daily program in different time zones. The thermostat is factory set with a standard week program. There is also the possibility of a purely manual operation. The thermostat is available in green, white and blue backlight.

Features
* New single-chip technology
* High reliability
* 6 time periods with individual temperature adjustable
* Work mode 5 + 2/6 + 1/7 days adjusted
* Easy operation
* In case of power failure receiving the stored settings
* Key Lock / Parental Control

Technical Specifications
* Operating voltage AC 230 V / 50 Hz
* Max. Switching power 3600W / 16A
* Power consumption 1W (VA)
* Range ambient + 5 ° C ~ + 35 ° C (25 ° C by default)
* Range soil temperature + 0 ° C ~ + 90 ° C
* Switching differential: adjustable from
* Display resolution 0.1 ° C
* Display Type: LCD
* Display size 60x45mm
* Sensor internal: NTC sensor 25 ° C / 10k
* Weight: 180g
* Soil Sensor: NTC sensor, length 300cm, NTC value 25 ° C / 10k

Function
* Manual mode (index finger)
* Automatic mode (clock - 9 clock)
* Heating mode (sun)
* Menu button (Book)
* Mode button (clock - clock 3)
* On / Off button (circle line)

Programming
1. Switch Thermostat
.. When switched off, the current room temperature is in the display "OFF" and displayed

2. Menu button
Choose .. Manuelle- or automatic mode

3. keys (arrow up / down)

4. Time / Date setting
..A. Pressing the Mode button for 5 seconds
..B. The adjusted parameter flashes and can be set
..c. Order of the parameters: weekday / Hour / Minute
..d. Skip to the next step, parameters with the Mode button

5. Keylock
.. Press the (clock) button and (book) simultaneously for 2 seconds to activate (--.- appears)
.. To deactivate analogous procedure as for activation

Sensor error
Er0: Internal sensor is shorted or disconnected
Er1: External sensor short-circuited or not connected
If the error program will Er0 / Er1 is displayed, the thermostat must be set correctly (see Sensor Mode), until the error message disappears.

Advanced Settings

For a correct functioning of the thermostat ensures the settings must be set correctly (well logical) perform purpose please follow these steps
Off * Thermostat
Switch * Thermostet
* During "Byc" is active, press the Menu key (book)
According to the table below to check or correct settings. To use the thermostat solely via the internal sensor to adjust the point "4 SEn" on value "IN".

1. adj - Temperature Calibration
..Korrektur The displayed actual value to the actual room temperature

2. PRG - program cycle
.. 2: 5 = 2 day weekend and 5 working days
.. 1: 6 = 1 day weekend and 6 working day
.. 0: 7 = 0, day weekend and 7 working days

3. LTP - antifreeze
.. ON: enabled
.. OFF: disabled

4. SEN - Sensor mode
.. IN: internal sensor only active
.. OUT: only external sensor active
ALL: Both sensors active

5. top - floor temperature limit
.. Setting the range range 5 - 80 ° C (factory setting 50 ° C)

6. dt0 - differentials internal sensor
.. Fixing the switching hysteresis for the internal sensor (0.5 ° C - 4 ° C)

7. DT1 - differentials external sensor
.. Fixing the switching hysteresis for the external sensor (0.5 ° C - 5 ° C)

8. BL - Backlight
.. ON: Always
.. OFF: Switch off after 5 seconds

9. SAT - In case of power failure
.. OFF: Start in the OFF
.. ON: starting as before

10. Def: Reset
.. Reset all settings by pressing switch "up arrow" button

Weekly program
For programming in normal operation, the menu button (book) for 5 seconds to hold. The first parameter value of the active week program flashes and can now be changed. In eineutem press the menu key to switch to the next parameter. There are 6 time parameters for working days as well as for weekend days. Each of these time parameters can be set at a predetermined temperature. After programming the thermostat switches over to its active mode.

Example 2: 5 Mode (2 day weekend and 5 working days per week)
Mon.
* P1 = Start time 06:00 = setpoint 22 ° C
* P2 = Start time 08:00 = setpoint 15 ° C
* P3 = Start time 11:30 = setpoint 15 ° C
* P4 = Start time 12:30 = setpoint 15 ° C
* P5 = Start Time 17:00 = setpoint 22 ° C
* P6 = Start Time 22:00 = setpoint 15 ° C
Sat-Sun
* P1 = Start time 06:00 = setpoint 22 ° C
* P2 = Start time 08:00 = setpoint 15 ° C
* P3 = Start time 11:30 = setpoint 15 ° C
* P4 = Start time 12:30 = setpoint 15 ° C
* P5 = Start Time 17:00 = setpoint 22 ° C
* P6 = Start Time 22:00 = setpoint 15 ° C

Note: You always sets only a start time. This value is valid until a new start time is reached.