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 Montage ........................................................................................................................................................................................7
2.3 Package content ............................................................................................................................................................................7
2.4 Proper thermostat location ...........................................................................................................................................................7
3. RXRT520 receiver ........................................................................................................................................................8
3.1 Receiver’s switches description ......................................................................................................................................................8
3.2 LED indications in the receiver .......................................................................................................................................................9
3.3 Wall mounting of the receiver .....................................................................................................................................................10
3.4 Connection description ................................................................................................................................................................11
I A - Boiler connection ........................................................................................................................................................11
I B - Pump / Valve connection .............................................................................................................................................11
4. Before you start (rst power up) ................................................................................................................................12
4.1 LCD icon description ....................................................................................................................................................................12
4.2 Button description .......................................................................................................................................................................12
4.3 First power up sequence and conguration .................................................................................................................................13
4.4 OpenTherm - Hot Water conguration .........................................................................................................................................17
4.5 Max boiler temperature settings .................................................................................................................................................17
5. User settings ............................................................................................................................................................18
5.1 Manual mode ..............................................................................................................................................................................18
5.2 Schedule mode - programming schedule ....................................................................................................................................19
5.3 Switching between manual and schedule mode .........................................................................................................................20
5.4 BOOST mode - hourly temperature override (+Hr) ......................................................................................................................21
5.5 Control and Heat/Cool settings ....................................................................................................................................................22
5.6 OFFSET temperature calibration ..................................................................................................................................................23
5.7 Landlord settings ........................................................................................................................................................................24
5.8 Time/Date ...................................................................................................................................................................................26
5.9 Holiday mode ..............................................................................................................................................................................27
5.10 Language ..................................................................................................................................................................................28
6. RT520RF thermostat pairing with the receiver ............................................................................................................29
7. Test the pairing process .............................................................................................................................................30
8. Factory Reset ............................................................................................................................................................31
9. Error codes ...............................................................................................................................................................31
10. Battery change .......................................................................................................................................................31
11. Cleaning and Maintenance ......................................................................................................................................32
12. Technical Informations ............................................................................................................................................32
13. Warranty ................................................................................................................................................................33