Vaillant auroMATIC 570 - solar differential controller
Code: 0020203655Product detailed description
Vaillant auroMATIC 570 - solar differential controller for domestic hot water heating and heating support
Vaillant auroMATIC 570 (also referred to as VRS 570) is an advanced solar differential controller designed to control solar thermal systems used for domestic hot water preparation and heating support. It is the top model in the Vaillant range of solar controllers, capable of simultaneously controlling up to two collector fields, two hot water storage tanks (or one storage tank and pool heating), and provides full backup heating from an auxiliary heat source if solar yield is insufficient to cover hot water demand.
The controller works on the principle of measuring the temperature difference (delta-T) between the collector field and the storage tank - when the collector temperature is sufficiently higher than the storage tank temperature, the controller starts the solar circuit circulation pump, efficiently transferring solar energy to the hot water storage tank. In addition to classic differential control, the auroMATIC 570 also offers a fixed-temperature control mode, suitable for example for controlling pool heating or other specific applications where it is desirable to maintain a constant temperature regardless of the temperature difference relative to the collector.
Main technical features
- Colour graphic TFT backlit display with text messages - clear display of current temperatures, solar yield and operating states.
- Control of up to two collector fields simultaneously (e.g. collectors oriented towards different directions or with different roof pitches).
- Option to connect a second hot water storage tank or pool heating as an additional solar consumer.
- Differential control (delta-T) as well as fixed-temperature control (fixed-T) depending on the specific application.
- Support for highly efficient PWM solar circulation pumps with smooth speed control instead of simple on/off switching.
- Display and recording of solar yield (the system's energy output) directly on the display, allowing you to track the real benefit of the solar system throughout the year.
- Weekly time program for both the storage tank charging circuit and the hot water circulation circuit.
- Holiday program for periods of prolonged absence.
- Thermal disinfection function for the storage tank (protection against legionella bacteria) with both daily and weekly time settings available.
- "Turn and click" control principle with a clear menu in the local language.
Compatibility and connection
The auroMATIC 570 is designed to work together with Vaillant auroTHERM solar collectors (both flat-plate and vacuum tube collectors) and auroSTOR storage tanks or combination storage tanks with two heat exchangers (solar + auxiliary heat source). The controller can also be integrated into a system with a Vaillant gas condensing boiler as an auxiliary heat source, with communication between the solar controller and the boiler taking place either through direct control of the charging circuit circulation pump, or in more advanced installations via the eBUS bus in cooperation with a multiMATIC or sensoCOMFORT system controller.
The controller requires the connection of several temperature sensors (collector sensor, sensor(s) in the storage tank(s), possibly a return sensor), which are ordered separately according to the specific wiring diagram of the solar system - typically VR 10 sensors (surface-mounted or immersion) and VR 11 sensors (high-temperature sensor for the collector).
Installation and commissioning
Installation of the auroMATIC 570 consists of mounting the controller on the wall near the solar station or storage tank, connecting the power supply, connecting the temperature sensors to the appropriate terminals according to the wiring diagram of the specific solar system (two collector fields, one or two storage tanks, or a pool), and connecting the outputs for controlling the circulation pumps. Once connected, the next step is to configure the hydraulic scheme in the controller menu (selecting one of the predefined schemes corresponding to your installation), setting the switch-on and switch-off temperature difference parameters, and finally setting the time programs for storage tank charging, hot water circulation, and thermal disinfection.
Given the complexity of solar systems and the variety of possible hydraulic schemes, we strongly recommend entrusting the design, installation and commissioning to a qualified solar technician experienced with Vaillant systems, who will select the correct hydraulic scheme and set optimal operating parameters for the specific roof, collector orientation and the household's hot water needs.
Typical use cases
The auroMATIC 570 is particularly suitable for larger family houses or apartment buildings with higher hot water consumption, where the investor wants to get the most out of their investment in the solar system - for example by combining collectors on two different roofs or orientations, or by adding pool heating as a second solar energy consumer during the summer months, when the hot water storage tank is already sufficiently heated and excess solar energy would otherwise go unused.
The controller is also a suitable choice when modernising an older solar system, where the original simpler controller can no longer handle the required functionality (e.g. controlling a second consumer or displaying solar yield), and the investor wants to keep the existing collectors and storage tank.
Why choose the auroMATIC 570
The main added value of the auroMATIC 570 compared to simpler solar controllers is its ability to control two collector fields and two consumers simultaneously, which significantly expands the possibilities for using solar energy, especially during the transitional periods of spring and autumn, when there is enough sunlight but the hot water storage tank may already be heated. The colour graphic display showing solar yield also provides the user with real feedback on the performance of their investment in the solar system, which is a motivating factor for using the system correctly (e.g. planning hot water consumption during periods of highest solar radiation).
The storage tank thermal disinfection function also provides an important hygienic benefit, since solar systems with lower storage tank operating temperatures can, under certain circumstances, be more prone to legionella bacteria growth - regular automatic disinfection effectively prevents these risks.
Maintenance and care
The auroMATIC 570 solar controller itself requires almost no maintenance, but regular annual inspection of the entire solar system by a qualified technician is important - checking the pressure and condition of the solar antifreeze fluid, the functionality of the circulation pumps, the tightness of connections, and the calibration of the temperature sensors. Clean the display and housing of the controller with a dry or slightly damp cloth. If an error message is displayed (e.g. sensor fault, excessive circuit temperature), we recommend contacting a service technician who will perform diagnostics using the controller's service menu.
Frequently Asked Questions (FAQ)
How many collector fields can the auroMATIC 570 control simultaneously?
The controller can control up to two independent collector fields, for example with different orientation or pitch, thereby maximising the use of available solar energy throughout the day.
Can pool heating be connected as a second consumer?
Yes, as an alternative to a second hot water storage tank, pool heating can be configured as a second solar consumer, which is particularly beneficial during the summer months with excess solar energy.
Are the temperature sensors included with the controller?
We recommend verifying the exact scope of delivery when ordering - depending on the specific configuration of the solar system, additional temperature sensors (e.g. VR 10, VR 11) may need to be purchased separately, depending on the number of collector fields and consumers.
How does storage tank thermal disinfection work?
At a set time (daily or weekly), the controller raises the temperature in the storage tank to a level required to eliminate legionella bacteria, either using solar yield or, if solar radiation is insufficient, using the auxiliary heat source.
Is the auroMATIC 570 compatible with Vaillant ecoTEC condensing boilers?
Yes, the solar controller can be integrated into a system with an ecoTEC boiler as an auxiliary source for hot water heating, with the exact wiring and communication method (direct pump control or via the eBUS bus) depending on the specific installation scheme.
What is the difference between differential control and fixed-temperature control?
Differential control compares the collector and storage tank temperatures and starts the pump when there is a sufficient temperature difference, while fixed-temperature control maintains a constant temperature regardless of this difference - suitable, for example, for pool heating, where the goal is to maintain a stable water temperature.
How a solar thermal system with the auroMATIC 570 controller works
A solar thermal system converts sunlight falling on the roof-mounted collectors into heat, which the heat transfer fluid (usually a mixture of water and antifreeze additive) transfers in the heat exchanger of the hot water storage tank. The task of the auroMATIC 570 controller is to continuously compare the temperature at the collector outlet with the temperature at the bottom of the storage tank - as soon as the temperature difference is large enough (typically a few degrees Celsius, the exact value is adjustable), the controller starts the circulation pump and heat begins to be transferred to the storage tank. When the temperature difference drops below the set threshold (for example when it is cloudy or in the evening), the pump stops to prevent heat from flowing back from the storage tank to the collector.
Thanks to support for PWM (pulse-width modulated) pumps, the auroMATIC 570 can smoothly regulate the speed of the circulation pump instead of simply switching it on at full power, achieving an optimal flow rate of the heat transfer fluid for the given intensity of sunlight. At low radiation intensity (for example early in the morning or with partial cloud cover), the pump runs at a lower speed, achieving a higher temperature at the collector outlet even with a lower flow rate - this increases the efficiency of heat transfer, especially during the transitional periods of the year.
Economic and environmental benefits
A solar system controlled by a high-quality controller such as the auroMATIC 570 can, in our climatic conditions, cover a substantial part of the annual energy requirement for hot water heating - often 80-100% during the summer months, and, depending on the size of the system, household consumption and roof orientation, typically 50-65% of the total energy requirement for hot water preparation on an annual average. This saving directly translates into lower consumption of gas, electricity or other fuel used as an auxiliary heat source, and therefore into lower household running costs. It also represents the use of a renewable energy source, which reduces the household's carbon footprint without any need to compromise on living comfort - hot water heating works automatically and transparently, without the need to change habits.
Precise control by the controller also extends the service life of the solar system as a whole - correctly set switch-on and switch-off temperature differences protect the circulation pump from unnecessary cycling (switching on and off) and also prevent the collectors from overheating during the summer months, when the storage tank is already fully heated.
Comparison with simpler solar controllers
| Feature | Simple controller (1 field, 1 consumer) | auroMATIC 570 |
|---|---|---|
| Number of collector fields | 1 | 2 |
| Number of consumers | 1 storage tank | 2 storage tanks or storage tank + pool |
| Display | Simple LCD | Colour graphic TFT with backlight |
| Solar yield display | Usually not available | Yes |
| Thermal disinfection | Rarely available | Yes, with a time schedule |
| Suitable for | Small households with a simple roof | Larger houses, more complex roofs, pools |
This table shows why the auroMATIC 570 is the choice especially for more demanding installations, where a simple single-field controller cannot meet the requirements for wiring flexibility or system performance display.
Additional frequently asked questions
What is the recommended interval for servicing the solar system?
We recommend performing a complete service inspection of the solar system, including the controller, pumps, pressure and condition of the antifreeze fluid, once a year, ideally before the start of the summer season, when solar radiation is most intense.
Can the controller prevent the solar system from overheating in summer?
Yes, the auroMATIC 570 includes protective functions against overheating of both the storage tank and the collector field - when the maximum safe temperature is reached, the controller stops the circulation pump, or redirects excess energy to a second consumer (e.g. a pool), if configured.
Summary
The Vaillant auroMATIC 570 is a top-of-the-range solar differential controller for demanding solar thermal systems with multiple collector fields or consumers. Thanks to its colour graphic display, solar yield display, thermal disinfection function and support for PWM pumps, it provides maximum efficiency and comfort when using solar energy for hot water preparation, heating support or pool heating. It is an investment in long-term reliable and precise control of the solar system, which pays off especially in larger or more complex installations.
Additional parameters
| Category: | Vaillant Controls |
|---|---|
| Warranty: | 2 years |
| Device type: | Solar differential controller (auroMATIC VRS 570) |
| Display: | Colour graphic TFT backlit display |
| Number of controlled collector fields: | 2 |
| Number of consumers: | 2 storage tanks or storage tank + pool heating |
| Control type: | Differential (delta-T) or fixed-temperature (fixed-T) |
| Pump control: | Support for highly efficient PWM solar pumps |
| Time programs: | Weekly charging and circulation program, holiday program |
| Protective functions: | Thermal disinfection of storage tank against legionella |
| Yield display: | Yes, solar yield directly on the display |
| Compatibility: | Vaillant auroTHERM collectors, auroSTOR storage tanks, ecoTEC boilers |
| Country of origin: | Germany |
| Manufacturer: | Vaillant |
| Warranty: | 2 years |
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O spoločnosti
Skupina Vaillant Group je synonymom vykurovania a prípravy teplej vody, pričom hlavný dôraz kladie na kvalitu, spoľahlivosť a užívateľský komfort. Jej produkty tepelnej techniky sú zastúpené vo viac ako 100 krajinách sveta. Združuje značky Vaillant, Saunier Duval, AWB, Bulex, DemirDöküm, Glow worm, Hermann Saunier Duval a Protherm. Každá z týchto značiek má s výrobou vykurovacích zariadení bohaté skúsenosti, pretože väčšina z nich je v danom segmente viac ako 80 rokov. So svojím 140 rokov dlhým pôsobením na trhu však patrí hlavne značka Vaillant k tým najväčším a najvýznamnejším. Dlhodobo je lídrom na trhu a priekopníkom vo vývoji a inováciách v oblasti vykurovacích technológií v Európe. Skupina Vaillant Group má vybudovanú rozsiahlu sieť obchodných zastúpení a tisíce spokojných zákazníkov po celom svete.
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