SALUS RT520, RT520TX, RT520RF Quick Guide

Introduction

The SALUS RT520 and RT520RF regulators are the latest models in the proven RT series. The new, built-in compensation function offers the most cost-effective solution, providing homeowners with optimal performance and maximum comfort in heating control. These regulators are available in both wired and wireless versions. They include all the functions of their predecessors from the RT series. Additionally, they feature a more intuitive LCD display and new, additional operational and performance functions.

Read this manual carefully before use.

Product Compliance

Directives: Electromagnetic Compatibility Directive EMC 2014/30/EU, Low Voltage Directive LVD 2014/35/EU, Radio Directive RED 2014/53/EU, and RoHS Directive 2011/65/EU. Full information is available at www.saluslegal.com.

Radio Frequency: 868.0-868.6MHz; <13dBm.

Safety

Use in accordance with regulations applicable in the given country and within the EU. Use the device as intended, preventing moisture ingress. The product is for indoor use only. Installation must be carried out by a qualified person, in accordance with the rules applicable in the given country and within the EU.

Always ensure that the mains power is switched off before installing or operating any components (including battery replacement). Use only AA 1.5V alkaline batteries in the regulator. Insert batteries into the battery compartment located on the back of the regulator. Do not use rechargeable batteries.

Technical Data

Button Functions (RT520/RT520RF Regulator)

• [MENU]: Enter menu options, holding for 3 seconds returns to the main screen or deactivates Boost mode.
• [SELECT]: Confirms changes, enters menu.
• [▼ DÓŁ]: Lowers the set temperature, allows navigation through the menu.
• [▲ GÓRA]: Increases the set temperature, allows navigation through the menu.
• [BOOST]: Activates Boost mode.
• [MANUAL]: Turns manual mode ON/OFF.

Receiver RXRT520 Functions:

• [ON]: In manual mode, turns the boiler ON.
• [OFF]: In manual mode, turns the boiler OFF.
• [AUTO]: Receiver operates automatically according to the regulator's commands.
• [MANUAL]: Receiver is controlled by the On/Off slide switch.

LCD Icon Description

• [Message Bar]: Indicates system status.
• [Temperature Unit]: Displays temperature unit (°C).
• [Day of Week (Numeric)]: Displays the day of the week numerically (e.g., 1-7).
• [Day of Week (Alphabetic)]: Displays the day of the week alphabetically (e.g., MON, TUE).
• [Clock]: Displays the current time.
• [AM/PM]: Indicates AM or PM for 12-hour time format.
• [Cooling Mode On]: Icon indicates that cooling mode is enabled.
• [Holiday Mode On]: Icon indicates that holiday mode is enabled.
• [Manual Mode On]: Icon indicates that manual mode is enabled.
• [Heating Mode On]: Icon indicates that heating mode is enabled.
• [Low Battery]: Icon indicates a low battery level in the regulator.
• [Wireless Connection]: Icon indicates a wireless connection to the receiver.
• [Service Mode On]: Icon indicates that service mode is active.
• [Measured/Set Temperature]: Displays the current measured temperature or the target set temperature.
• [Program Number]: Displays the current program number.
• [Settings]: Icon related to settings.
• [Program Indication]: Icon related to program status.
• [Boost Function]: Icon indicating the Boost function is active.

Electrical Connections (RT520 Regulator)

Connector:

• B/A: OpenTherm communication wire.
• NC: Normally Closed connector.
• NO: Normally Open connector.
• COM: Common COM connector.

Electrical Connections (RXRT520 Receiver)

Connector:

• A/B: OpenTherm communication wire.
• NO: Normally Open connector.
• COM: Common COM connector.
• L; N: Power supply (230 V AC).

OpenTherm - Startup and Configuration

Modulating control via the OpenTherm protocol is a method used by modern heating systems. Instead of switching the boiler on and off at set intervals, modulating control allows for adjusting the amount of heat delivered by the boiler to match the variable demand from the regulator. This increases system efficiency, leading to energy savings and enhanced comfort.

Before inserting batteries into the regulator, correctly connect the receiver and supply it with power.

Initial Setup Steps:

1. After inserting batteries, the thermostat will start up.
2. Press [SELECT].
3. Using [▲ GÓRA] or [▼ DÓŁ] buttons, select the language, then press [SELECT].
4. Using [▲ GÓRA] or [▼ DÓŁ] buttons, select the time format (24 hr or 12 hr), then press [SELECT].
5. Using [▲ GÓRA] or [▼ DÓŁ], set the hour, then press [SELECT].
6. Using [▲ GÓRA] or [▼ DÓŁ], set the minutes, then press [SELECT].
7. Using [▲ GÓRA] or [▼ DÓŁ], set the year, then press [SELECT].
8. Using [▲ GÓRA] or [▼ DÓŁ], set the month, then press [SELECT].
9. Using [▲ GÓRA] or [▼ DÓŁ], set the day, then press [SELECT].
10. Using [▲ GÓRA] or [▼ DÓŁ], select the format for days of the week, then press [SELECT].
11. Using [▲ GÓRA] or [▼ DÓŁ], enable or disable DST (Daylight Saving Time), then press [SELECT].
12. Using [▲ GÓRA] or [▼ DÓŁ], select the desired temperature display accuracy (0.1°C or 0.5°C), then press [SELECT].

The device software will automatically adjust to OpenTherm settings if the regulator is connected using the OpenTherm connector.

OpenTherm - Domestic Hot Water (CWU)

1. Press [MENU].
2. Using [▲ GÓRA] or [▼ DÓŁ], navigate to the domestic hot water submenu and press [SELECT].
3. Using [▲ GÓRA] or [▼ DÓŁ], set the desired temperature, then press [SELECT].

The regulator will return to the main screen. Press any button.

The message bar indicates that domestic hot water is being heated.

Regulator RT520TX - Pairing with Receiver

For the RT520RF set, the regulator and receiver are factory paired.

During pairing, ensure the regulator and receiver are at least 1 meter apart.

If RT520TX and RXRT520 were purchased separately or need re-pairing:

1. Ensure the device is disconnected from power.
2. Set the receiver's switches to AUTO and ON.
3. Connect the receiver to the power source and wait for the red LED to light up steadily or blink.
4. Quickly (within 2 seconds) move the switch to OFF and then back to ON. A flashing red LED confirms entry into pairing mode.

The pairing process can take up to 10 minutes.

Upon successful pairing, the red LED on the receiver will light up.

Standard Startup and Configuration

Follow steps 1 to 17 from the "OpenTherm - Startup and Configuration" section.

Note: Using [▲ GÓRA] or [▼ DÓŁ] allows selection between TPI (step 2) or HYSTERESIS (step 6). Selecting one option excludes the other.

TPI (Time Proportional & Integral)

TPI is a self-learning, time-proportional control algorithm. TPI regulation ensures economical system operation by maintaining temperature more accurately during the control process. Besides precise and stable room temperature, its advantages include minimized energy consumption and significant savings.

RT520 offers 3 types of TPI control:

• 1. For radiators (6CPH)
• 2. For underfloor heating (3CPH)
• 3. For electric heating (9CPH)

Hysteresis

Hysteresis is the difference between the measured temperature and the activation/deactivation temperature of the connected device (e.g., boiler or pump).

Optimum Start/Stop

The Optimum Start function is an optional feature that, depending on the room temperature, initiates boiler operation at a time calculated to reach the set temperature according to the schedule. It saves energy by turning off the boiler for the minimum required time.

Optimum Stop calculates how long the room will cool down and then switches off the boiler at the earliest possible moment, meaning the system does not run when not necessary. If a sudden heat loss occurs during this period, Optimum Stop will be overridden to restore comfort.

Administrator Settings

Administrator settings are a PIN-protected function that allows the administrator to set a service reminder on the regulator, which will alert the tenant about an upcoming boiler inspection.

1. Press [MENU].
2. Using [▲ GÓRA] or [▼ DÓŁ], navigate to the ADMIN submenu and press [SELECT].
3. Using [▲ GÓRA] or [▼ DÓŁ], enter the PIN code. Press [SELECT] to confirm each digit.
4. Press [SELECT].
5. Using [▲ GÓRA] or [▼ DÓŁ], select ON and press [SELECT] to enable the service reminder.

Programming - Automatic Mode

In this mode, the user can set the regulator's schedules (set temperatures for specific time intervals). Programmed schedules should utilize all available time slots.

Program Types:

• +2: Separate schedule for weekdays and weekends.
• All days: One schedule for the entire week.
• Individual: Separate schedule for each day of the week.

Follow on-screen prompts to set the desired day, time, and temperature for each program period.

Testing Regulator-Receiver Connectivity

Follow on-screen prompts to initiate the test mode.

The testing process can take up to 10 minutes.

After the test, the red and green LEDs on the receiver will blink.

Factory Reset

To reset the regulator, simultaneously hold [MENU], [▼ DÓŁ], and [BOOST] for 5 seconds.

The device will reset and restart. Administrator settings will not be reset.

Company Information

Distributor: QL CONTROLS Sp. z o.o., ul. Rolna 4, 43-262 Kobielice, Polska. Tel: +48 32 700 74 53, Tel: +48 32 750 65 05, E-mail: serwis@salus-controls.pl, www.salus-controls.pl

Head Office: SALUS Controls plc, SALUS House, Dodworth Business Park South, Whinby Road, Dodworth, Barnsley S75 3SP, UK. T: +44 (0) 1226 323961, E: sales@salus-tech.com, E: techsupport@salus-tech.com

SALUS Controls is part of the Computime group.

SALUS Controls plc reserves the right to change specifications, design, and materials of products mentioned in this brochure without prior notice, maintaining a policy of continuous product development.

Document Release Date: November 2018, V012

Certifications: CE, EAC