
TABLE OF CONTENTS
1. Introduction...............................................................................................................................................................4
1.1 Product Compliance ......................................................................................................................................................................4
1.2 Safety Informations.......................................................................................................................................................................4
2. Product Overview .......................................................................................................................................................5
2.1 Example of boilers compatible with the OpenTherm OT+ 4.0 protocol..........................................................................................6
2.2 Package content............................................................................................................................................................................7
2.3 Proper thermostat location ...........................................................................................................................................................7
2.4 Connection description..................................................................................................................................................................8
I A - Boiler connection ..........................................................................................................................................................8
I B - Pump /Valve connection...............................................................................................................................................8
3. Before you start (rst power up) ..................................................................................................................................9
3.1 LCD icon description ......................................................................................................................................................................9
3.2 Button description.........................................................................................................................................................................9
3.3 First power up sequence and conguration.................................................................................................................................10
4. Operating.................................................................................................................................................................11
4.1 Setpoint temperature change (manual mode)............................................................................................................................11
4.2 Schedule mode - programming schedule....................................................................................................................................12
4.3Temporary override mode ...........................................................................................................................................................13
4.4 OFF mode....................................................................................................................................................................................13
4.5 Language....................................................................................................................................................................................14
4.6 Advanced settings.......................................................................................................................................................................15
4.6.1 DST (Daylight SavingTime) setting ............................................................................................................................15
4.6.2 Display temperature accuracy....................................................................................................................................16
4.6.3 PIN Code.....................................................................................................................................................................16
4.6.4 Service alert...............................................................................................................................................................17
4.6.5 Optimum Start...........................................................................................................................................................18
4.6.6 Optimum Stop ...........................................................................................................................................................18
4.6.7Thermostat temperature calibration ..........................................................................................................................19
4.6.8 Minimum setpoint temperature.................................................................................................................................19
4.6.9 Maximum setpoint temperature................................................................................................................................19
4.6.10 Frost protection temperature...................................................................................................................................20
4.6.11 Control algorithm.....................................................................................................................................................20
4.7 Holiday mode..............................................................................................................................................................................21
4.8Time/Date ...................................................................................................................................................................................22
4.9 BOOST hours - hourly temperature override................................................................................................................................23
4.10 Operating mode........................................................................................................................................................................24
5. Factory Reset............................................................................................................................................................25
6. Error codes ...............................................................................................................................................................26
7. Cleaning and Maintenance ........................................................................................................................................27
8. Technical Informations..............................................................................................................................................27
9. Warranty..................................................................................................................................................................28