Home > SALUS CONTROLS > SALUS CONTROLS RT520 Thermostat User Manual
SALUS CONTROLS RT520 Thermostat User Manual
| General | Details |
|---|---|
| Name | SALUS CONTROLS RT520 Thermostat User Manual |
| Make | SALUS CONTROLS |
| Language | English |
| Filetype | PDF (Download) |
| File size | 1.9 MB |

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SALUS CONTROLS RT520 Thermostat User Manual Overview
Summary of Contents
- Page 1: Page 1
- Page 2: Introduction Product compliance Safety informations Product overview Example of boilers compatible with the OpenTherm OT+ 4.0 protocol Proper thermostat location Connection description Before you start (first power up) LCD icon description Button description First power up sequence and configuration User settings Manual mode Schedule mode - programming schedule BOOST mode - hourly temperature override (+Hr) Control and heat/cool settings Factory reset Error codes Battery change Cleaning and maintenance Warranty
- Page 3: Product overview The RT520 room thermostat switches the heating system on and off as necessary by sensing the air temperature. Turning a room thermostat to a higher setting does not make the room heat up any faster. The heating system will not work if a time switch or programmer has switched it off. Set the room thermostat to the lowest comfortable temperature and leave it alone for optimal energy savings. Thermostatic radiator valves (TRVs) can allow for different temperatures in individual rooms. Room thermostats need a free flow of air to sense the temperature and must not be obstructed. The thermostat is compatible with OpenTherm OT+ 4.0 version. OpenTherm protocol allows for two-way communication between the boiler and thermostat, increasing energy efficiency. Ensure your gas combi boiler is compatible with OT + 4.0 communication protocol. Product advantages include automatic detection of the OT + 4.0 protocol and temperature regulation.
- Page 4: Example of boilers compatible with the OpenTherm OT+ 4.0 protocol Vokera models include E-Tec S, E-tec Plus, Linea HE, Mynute A, Mynute HE, and Unica HE. Alpha Heating offers models such as E-tec, Evoke, Intec GS, and various Vitodens models. Viessmann provides multiple Vitodens models including 100W and 200-W series. Vaillant features Ecofit Pure and several i-series condensing combination boilers. Worcester offers Greenstar models, including CDi Classic and Highflow CDi. Intergas has Rapid and Compact Range models compatible with OpenTherm. Main offers Eco Compact Combi models. Navien includes NCB and Quinta Ace models. Ravenheat provides Quinta Pro and other models compatible with OpenTherm. Vokera also has models like Verve and Vision that operate in heating mode only.
- Page 5: Montage Package content RT520 thermostat Back housing 2x AA batteries Short instruction Mounting screws Proper thermostat location The ideal position for thermostat mounting is about 1.5m under floor level, far from heating or cooling sources. The thermostat cannot be exposed to sunlight or extreme conditions like drafts.
- Page 6: Connection description Boiler connection Pump / Valve connection KL08NSB underfloor heating wiring center connection Boiler connection details include ON/OFF thermostat contacts. Power supply is 230V. Voltage-free output is indicated by NO, COM, NC. OpenTherm communication wire is labeled A, B. 230V AC voltage output is marked as SL. The system supports 1-8 zones. Maximum of 6 devices per zone is allowed.
- Page 7: Before you start (first power up) LCD icon description Text Bar Heating Mode On Low battery status Wireless connection with the receiver Service Mode On Temperature measured / set Program number Button description MENU / RETURN - enter the menu options, press and hold for 3 sec to return to main screen
- Page 8: First power up sequence and configuration Make the receiver connections and power the receiver before inserting the batteries into the thermostat. After inserting the batteries, the thermostat will power up. Choose your language and then press to confirm. Set the time format and then press. Set the hour and then press. Set the year and then press. Set the month and then press. Set the minutes and then press. Set the day and then press. Select the week format and then press.
- Page 9: Press to confirm. Using or, enable or disable DST (Daylight Saving Time). When OpenTherm is connected, the device software will automatically adjust to the OpenTherm settings. Using or, select your temperature accuracy.
- Page 10: TPI (Time Proportional & Integral) is a self-learning, time-proportional algorithm. TPI type of regulation ensures economical system operation through more accurate temperature maintenance during controlling process and limits overload conditions. The advantage of this system is the minimization of energy consumption and significant savings. RT520 offers 3 types of TPI control: for radiator, for underfloor heating, and for electric heating. Span is the difference between the measured temperature and the set temperature.
- Page 11: The optimization function is an energy-saving algorithm used for efficient control of the heating device, ensuring better thermal comfort at certain times of the day. When the OPTIMUM START function is active, the thermostat sends a heating signal to the heat source beforehand so that the preset temperature in the room is reached at the time specified in the schedule. When the OPTIMUM STOP function is active, the thermostat, taking into account the inertia of the system, switches off the heat source earlier, keeping the temperature set in the schedule. The thermostat will go to the main screen.
- Page 12: OpenTherm - Hot Water configuration RT520 can be configured in Hot Water OPENTHERM system. To configure it follow steps below. The thermostat will return to the main screen. The text bar indicates that hot water is in operation. Max boiler temperature settings In this chapter you will learn how to set max temperature for connected boiler. Follow steps below. Thermostat will go back to the main screen with saving all settings. Using set MAX temperature for boiler.
- Page 13: User settings In manual mode, the thermostat maintains a constant temperature set by the user. A hand icon will appear, which means that the thermostat is in manual mode. To set temperature use the up or down button. Confirm your choice using the confirm button. The thermostat will maintain the temperature until manual change or manual mode exit. To exit mode, press and hold the button for 3 seconds. The display indicates when manual mode is active.
- Page 14: Schedule mode allows users to set temperature setpoints for specific periods of time. Programmed schedules should utilize all time periods. Users can select the program type: 5+2 for working days and weekends, All for the entire week, or Individual for a daily schedule. Confirmation is done by pressing a button. Users can set the hour and minutes for each schedule. Temperature settings can also be adjusted for each time period. The process needs to be repeated for all time periods.
- Page 15: Switching between manual and schedule mode allows the user to control the thermostat settings. To switch modes, follow specific steps involving button presses. A hand icon indicates that the thermostat is in manual mode. Pressing and holding a button will revert the thermostat to schedule mode. The process involves a sequence of button presses and holding.
- Page 16: BOOST mode allows for hourly temperature override. This function is available in both automatic and manual modes. Users can change the temperature for a specified number of hours, up to 9 hours. After the set time, the thermostat returns to the previous operating mode. To set the BOOST mode, press the +Hr button to select the desired hours. The thermostat will maintain the set temperature for the specified duration. To stop BOOST mode, hold the button for 3 seconds or press the +Hr button until +0 appears. Confirm the stop by pressing the button. The thermostat will then revert to the main screen and previous work mode. This feature allows for temporary temperature adjustments as needed.
- Page 17: Control and heat/cool settings allow users to set the control algorithm and mode. Users can choose between TPI, SPAN, or Optimize. Steps include pressing a button to enter settings. Navigation between parameters is done using specific buttons. Confirmation of the heat/cool option is required. Users can move between parameters to make selections.
- Page 18: Offset temperature calibration In this chapter you will learn how to properly calibrate the temperature in the RT520 thermostat. Calibration is possible in the range from -3.5°C to 3.5°C (in steps of 0.5°C). To calibrate temperature please follow steps below. Confirm OFFSET option using the button. Using the buttons, move between parameters. Calibrate temperature using the buttons. Confirm your choice by pressing the button.
- Page 19: Landlord settings is a pin code protected feature that allows the landlord to set a service reminder on the thermostat. The first PIN code entry is also the setting of a new PIN code which must be entered each time to enter the landlord menu. Please remember to write down your pin code so that you can use the landlord menu later without any hassle. Using the menu, select ON to activate the service reminder. Select the due date and the warning period for the service reminder. Select the lock temperature as part of the settings. To confirm and exit this option, use the appropriate button. Navigate through the landlord options to access additional settings. Ensure to confirm every digit when entering the PIN code. This feature is designed to help landlords manage boiler service reminders efficiently.
- Page 20: Press to move to the MAX temperature setpoint value. Confirm and select the correct next option. The thermostat will go back to the SERVICE option. To return to the main screen, wait 10 seconds or press the button. Use the correct MIN temperature setpoint value. Confirm and select the appropriate option.
- Page 21: To set time/date follow steps below: Press to enter Time/Date settings. Using or move between parameters. Using or choose to set the hour. Using or set the time format. Using or set the minutes. Using or set the day. Using or set the year. Using or set the month. Thermostat will go to the main screen with saving all the settings. Using or enable or disable DST (Daylight Saving Time).
- Page 22: Holiday mode is a special program temperature setpoint which the thermostat will maintain for specified days. To set holiday mode, press the appropriate button to enter the settings. Use the navigation buttons to move between holiday mode parameters. Set the year, month, and day for the start of holiday mode. Repeat the steps to set holiday mode’s final day. Set the hour and minutes for the holiday mode. To abort holiday mode, press any button and confirm holiday stop. The plane icon will disappear, and the thermostat will revert to the previous work mode. According to the set period of time, the plane icon will appear on the main screen indicating the thermostat is in holiday mode. Set the temperature to be maintained during holiday mode.
- Page 23: To choose language follow steps below: Press to enter parameters. Using or move between language settings. Thermostat will go to the main screen with saving the changes. Press to confirm. Using or choose your language.
- Page 24: Factory reset To reset the RT520 thermostat to its factory default settings, press and hold the buttons for 5 seconds. The thermostat has been reset. User settings will not be deleted. Error codes The thermostat will display errors only when connected to the boiler by OPENTHERM terminals. Refer to the boiler manual for different error codes. Battery change Turn the thermostat over to access the back. Insert the batteries, paying attention to their polarity.
- Page 25: Cleaning and maintenance of the RT520 thermostat requires no special maintenance. The outer casing can be wiped clean using a dry cloth. Do not use solvents, polishes, detergents, or abrasive cleaners. There are no user serviceable parts within the unit. Any servicing or repairs should be carried out by Salus Controls or their appointed agents. Technical information includes a power supply of 2 x AA batteries. The rating max is OpenTherm or voltage free relay. The output signal and temperature range are specified. Display temperature accuracy is either 0.1°C or 0.5°C. The control algorithm can be TPI or hysteresis. The dimensions of the unit are 95 x 118 x 26 mm.
- Page 26: Warranty SALUS CONTROLS warrants this product to be free from any defects in material or workmanship and to perform as specified for a period of five years from the date of installation. SALUS CONTROLS reserves the sole responsibility for breach of this warranty by repairing or replacing the defective product. This product includes software that matches the distributor’s identification at the time of sale. The manufacturer/distributor provides a guarantee covering all functions and specifics of the product in accordance with this marking. The distributor’s warranty does not cover the correct operation of the functions and features available as a result of a product software update. The full warranty conditions are available at the SALUS CONTROLS website.
- Page 27: Producer: Salus Controls Plc Salus Controls is a member of the Computime Group. Maintaining a policy of continuous product development, Salus Controls plc reserve the right to change specification, design and materials of products listed in this brochure without prior notice. Ver. 5 Issued: 04 V 2021 Soft version: 2.3











































