Salus WBRT520TX+ Wireless Thermostat Quick Guide and Configuration
Introduction
The WBRT520TX+ is a new Thermostat with an on-board load compensation feature, offering a cost-effective, fully compliant Boiler Plus solution. It provides homeowners with optimum efficiency and maximum heating control comfort, including all required heating market features with a large, intuitive LCD display and a new suite of additional operational and efficiency functions. Please read this manual carefully before use.
Product Compliance
This product complies with the essential requirements and other relevant provisions of the following EU Directives: EMC 2014/30/EU, LVD 2014/35/EU, RED 2014/53/EU and RoHS 2011/65/EU.
Technical specifications include: 868.0-868.6MHz; <13dBm.
Safety Information
Use in accordance with national and EU regulations. Use the device as intended, keeping it in dry condition. Product for indoor use only. Installation must be carried out by a qualified person in accordance with national and EU regulations.
Always ensure the AC mains power is switched off before installing or working on any components (this includes replacing the batteries). Use only AA 1.5 V alkaline batteries in the thermostat. Place the batteries into the battery slot located in the back of the thermostat. Do not use rechargeable batteries.
Technical Specifications
| Feature | Specification |
|---|---|
| Thermostat Supply | RT520TX+ Thermostat: 2 x AA alkaline batteries |
| Temperature Range | 5°C - 33.5°C |
| Temperature Accuracy | 0.1°C or 0.5°C |
| ErP Control Class | V |
| Radio Frequency | 868 MHz |
| Dimension [mm] | 118 x 95 x 26 [mm] |
LCD Icon Description
The thermostat's LCD display shows various icons:
- 1 Text Bar: General text display area.
- 2 Temperature Unit: Displays the temperature unit (°C).
- 3A Day of the week (numeric): Shows the day of the week numerically (e.g., 1 for Monday).
- 3B Day of the week (alphabetic): Shows the day of the week alphabetically (e.g., MON).
- 4 Clock: Displays the current time.
- 5 AM/PM: Indicates AM or PM for the 12-hour time format.
- 6 Frost Protection Mode On: Icon indicates frost protection is active.
- 7 Holiday Mode On: Icon indicates holiday mode is active.
- 8 Manual Mode On: Icon indicates manual mode is active.
- 9 Heating Mode On: Icon indicates the heating system is active.
- 10 Low battery status: Icon ? indicates the thermostat batteries are low.
- 11 Wireless connection with the receiver: Icon ? indicates the wireless connection status to the receiver.
- 12 Service Mode On: Icon indicates service mode is active.
- 13 Temperature measured / set: Displays the current room temperature and the set temperature.
- 14 Program number: Indicates the current program number being used.
- 15 Settings: Icon ⚙️ indicates the thermostat is in the settings menu.
- 16 Program indicator: Shows the status of the programmed schedule.
- 17 Boost function: Icon indicates the boost function is active.
Power Up and Configuration
After inserting batteries, the thermostat powers up. Follow these steps for initial configuration:
- After inserting the batteries, the thermostat will power up.
- Press SELECT.
- Using UP and DOWN buttons, choose your desired language and then press SELECT.
- Using UP or DOWN buttons, choose the time format (12 hr or 24 hr) and press SELECT.
- Using UP or DOWN buttons, set the hour and then press SELECT.
- Using UP or DOWN buttons, set the minutes and then press SELECT.
- Using UP or DOWN buttons, set the year and then press SELECT.
- Using UP or DOWN buttons, set the month and then press SELECT.
- Using UP or DOWN buttons, set the day and then press SELECT.
- Using UP or DOWN buttons, select your desired temperature accuracy (0.1°C or 0.5°C) and press SELECT.
- Using UP or DOWN buttons, select the week format (e.g., numeric or alphabetic day of the week) and press SELECT.
- Press SELECT to confirm all settings.
Diagram Description: A series of screenshots illustrates the power-up and configuration sequence. It shows the initial power-on state, language selection, 12/24 hour format selection, hour, minute, year, month, day, temperature accuracy, and week format selection screens, with prompts to use UP/DOWN buttons and press SELECT to confirm each step.
Pairing with Receivers
If you purchased the RT520TX+ and a receiver separately, or need to re-pair them, follow these steps. Ensure the receiver is disconnected from power, then set its switches to AUTO and ON. Connect the receiver to power and wait for the red LED to light steadily. Quickly switch the receiver's switch from OFF to ON. A flashing red LED confirms the receiver is in pairing mode.
Note: If pairing multiple receivers, all receivers need to be in pairing mode before activating pairing mode on the thermostat.
- Press MENU on the thermostat.
- Using UP or DOWN buttons, navigate to the "PAIRING" submenu and press SELECT.
- Using UP or DOWN buttons, select "PAIR" and press SELECT.
- The pairing process takes up to 10 minutes.
Pairing with RXRT510 Receiver:
Diagram Description: Shows the RXRT510 receiver with switches set to AUTO and ON. The LED indicator is shown flashing red, indicating it's in pairing mode. Text indicates that once the receiver is powered up and put into pairing mode, the flashing stops, and it turns solid green (Heatcall) or solid red (No call) when found by the thermostat.
Pairing with SR868 Relay:
Diagram Description: Shows the SR868 relay connected to AC 230V (L, N) and a volt-free connection (NO, COM). The LED indicator is shown flashing red. Text explains that as soon as the relay is powered up and put into pairing mode, the flashing stops, and it turns solid green (Heatcall) or solid red (No call) when found by the thermostat.
Pairing with SPE868 Plug:
Diagram Description: Shows the SPE868 plug inserted into a wall socket. The LED indicator is shown flashing red. Text explains that as soon as the plug is powered up and put into pairing mode, the flashing stops, and it turns solid green (Heatcall) or solid red (No call) when found by the thermostat.
Successful Pairing: After successful pairing, the receiver's LED will change from flashing red to solid green (indicating a heating call) or solid red (indicating no heating call).
Connection Diagram for Wired Receivers
| Terminal | Description |
|---|---|
| NO | Volt-free out |
| COM | Volt-free in |
| L | Live 230 V AC |
| N | Neutral (N) 230V |
Diagram Description: Illustrates the wiring terminals for a wired receiver (e.g., SR868). It shows connections for AC 230V mains power (L and N) and volt-free connections (NO and COM) intended for boiler control. A typical connection shows the receiver wired to the mains and then to the boiler's control circuit.
Standard Power Up and Configuration
Follow steps 1 to 14 from the "Power Up and Configuration" section for initial setup.
TPI (Time Proportional & Integral) Control
TPI is a self-learning, time-proportional algorithm that ensures economical system operation through accurate temperature maintenance and limited overload conditions. It minimizes energy consumption and provides significant savings. The RT520 offers 3 types of TPI control:
- 1. For radiator heating (6CPH - Cycles Per Hour)
- 2. For underfloor heating (3CPH)
- 3. For electric heating (9CPH)
To select TPI type:
- Press SELECT.
- Using UP or DOWN buttons, select the desired TPI type (TPI RAD, TPI UFH, TPI ELEC) and press SELECT to confirm.
Diagram Description: Shows screens for selecting TPI control types: 'TPI RAD', 'TPI UFH', 'TPI ELEC'. User uses UP/DOWN to select and SELECT to confirm.
Span Setting
Span is the difference between the measured temperature and the set temperature. A smaller span provides more precise temperature control.
To set Span:
- Press SELECT.
- Using UP or DOWN buttons, select the desired Span value (e.g., 1.5, 1.2, 0.5) and press SELECT to confirm.
Diagram Description: Shows screens for setting the Span value. Options like '1.5', '1.2', '0.5' are displayed, with prompts to use UP/DOWN and SELECT.
Optimum Stop
Optimum Stop calculates how long the house will take to cool down and turns off the boiler at the earliest possible moment to save energy. If there is a sudden heat loss, Optimum Stop will be overridden to maintain comfort.
To enable Optimum Stop:
- Press SELECT.
- Using UP or DOWN buttons, select ON or OFF for Optimum Stop and press SELECT to confirm.
Diagram Description: Shows a screen with 'OPTIMUM STOP' and options 'ON' and 'OFF'. User selects one using UP/DOWN and confirms with SELECT.
Optimum Start
Optimum Start is a selectable function that starts the boiler operation at the optimum time to achieve the set-point temperature, based on the ambient room temperature. It saves energy by firing the boiler only for the minimum required time.
To enable Optimum Start:
- Press SELECT.
- Using UP or DOWN buttons, select ON or OFF for Optimum Start and press SELECT to confirm.
Diagram Description: Shows a screen with 'OPTIMUM START' and options 'ON' and 'OFF'. User selects one using UP/DOWN and confirms with SELECT.
Landlord Settings
Landlord settings is a PIN code protected feature that allows landlords to set a service reminder on the thermostat, warning the tenant when the boiler is due its annual service.
- Press MENU.
- Using UP or DOWN buttons, navigate to the "Landlord" submenu and press SELECT.
- Using UP or DOWN buttons, select ON or OFF for the service reminder and press SELECT to confirm. The thermostat will return to the main screen.
- To configure the reminder: Press MENU, navigate to Landlord submenu, and press SELECT.
- Using UP or DOWN buttons, enter the PIN code number. Press SELECT to confirm each digit.
- Using UP or DOWN buttons, select the due date for the service and then press SELECT.
- Using UP or DOWN buttons, select the warning period (e.g., days before due date) and then press SELECT.
- Using UP or DOWN buttons, select the lock temperature (if applicable) and then press SELECT.
- Using UP or DOWN buttons, enter the phone number for service contact and press SELECT to confirm each digit.
Once service mode has become active, the device will lock the set point temperature as set by the installer/landlord. To unlock this device, the landlord needs to be contacted and the boiler serviced.
Diagram Description: Illustrates the Landlord Settings menu flow. It shows screens for entering a PIN code (e.g., '88 88'), setting the service reminder ON/OFF, selecting a due date, warning period, lock temperature, and entering a contact phone number. The final screen might show a summary of settings.
Programming - Automatic Mode
In this mode, users can set schedules for the thermostat, defining temperature setpoints for specific periods of time. Programmed schedules should utilize all time periods.
- Press MENU.
- Press SELECT.
- Using UP or DOWN buttons, select the program type:
- +2: Separate schedules for working days and weekends.
- All: One schedule for the entire week.
- Individual: A daily schedule for each day.
- Using UP or DOWN buttons, select ON and press SELECT.
- Using UP or DOWN buttons, select the desired time (hour and minutes) for the start of a period and press SELECT.
- Using UP or DOWN buttons, set the temperature for that period and then press SELECT.
- Repeat steps 5 and 6 for all time periods within the selected schedule type.
Diagram Description: Shows the programming interface. It includes options for selecting program types (+2, All, Individual), setting time slots (e.g., '06:00') and corresponding temperatures (e.g., '18.0°C'). The process involves navigating through different time periods and temperature settings for each day or the entire week.
Factory Reset
To reset the thermostat to its factory default settings:
- Press and hold the MENU, DOWN, and BOOST buttons simultaneously for 5 seconds.
Note: Landlord settings will not be reset.
The device will reset and start up automatically.
Diagram Description: Illustrates the factory reset procedure, showing the MENU, DOWN, and BOOST buttons being pressed together. A screen might indicate 'Factory Reset' or show the device rebooting.
