Euroster 813 Solar

Product detailed description

The Euroster 813 Solar is commonly used in residential and commercial solar thermal systems to manage heat transfer between solar collectors and storage vessels. It is typically installed in mechanical rooms, utility areas or near the solar array. The controller ensures efficient operation by adjusting pump and supplementary heat source activation based on real-time temperature data from the collector and storage tanks. Installers working with hybrid solar systems benefit from its ability to operate in four distinct modes, each with a displayed wiring diagram for clarity during commissioning.

Its design supports integration into both simple and complex solar heating systems, including those with multiple storage vessels. The controller is suitable for use in both new builds and retrofit projects, where precise temperature control and system diagnostics are required. The illuminated LCD display allows for easy monitoring of system status and settings, even in low-light conditions.

Technical parameters

The technical parameters define the controller's suitability for specific system configurations. The 7 A and 16 A relay outputs allow for control of both low-power pumps and higher-capacity supplementary heat sources. The temperature measurement range ensures compatibility with a wide range of solar collectors and storage vessels. The 1°C control and measurement accuracy is critical for maintaining stable system performance in varying ambient conditions.

Installation and connection

Installation involves mounting the Euroster 813 Solar on a wall using the provided bracket and wall box. The controller connects to the solar collector pump and supplementary heat source via 230 V 50 Hz relay outputs. Three temperature sensors are included for monitoring the collector and up to two vessels. The installation diagram for each operating mode is displayed on the controller, aiding in correct wiring.

Key checks during installation include verifying the correct polarity of the 230 V power supply and ensuring secure connections to the relay outputs. Common mistakes include incorrect sensor placement or misconfigured operating modes, which can lead to inefficient system operation. The IP30 rating means the controller should be installed in a dry, protected location to avoid damage from dust or moisture.

Compatibility and accessories

The Euroster 813 Solar is compatible with solar collector pumps and supplementary heat sources that operate within the relay output specifications. The package includes three temperature sensors, a mounting bracket, wall box and dowels. No additional accessories are required for basic installation, but system designers should verify compatibility with existing control systems and sensors in hybrid configurations.

Technical background for designers

The Euroster 813 Solar operates by comparing temperature readings from the solar collector and storage vessels to setpoints defined in the selected mode. The controller uses a relay to switch the pump and supplementary heat source on or off based on these comparisons. The white housing is made from durable, non-conductive materials suitable for indoor installation. The system's efficiency depends on correct sensor placement and accurate configuration of hysteresis and control ranges. Long-term performance is affected by environmental conditions, such as ambient temperature and dust accumulation on the display.

Service and operation

Regular service includes checking the integrity of electrical connections and verifying the accuracy of temperature sensors. The controller does not require scheduled maintenance intervals, but performance should be monitored during routine system checks. If the display becomes dim or unresponsive, the power supply should be inspected for faults. The operating temperature range of 0°C to +45°C means the controller should not be installed in areas with extreme temperature fluctuations.

Frequently asked questions

Can the Euroster 813 Solar be used with more than two vessels?
No, the controller is designed to regulate up to two vessels based on the selected operating mode.

Is the controller suitable for outdoor installation?
No, the IP30 rating means it must be installed indoors in a dry, protected location.

Can the hysteresis be adjusted?
Yes, the hysteresis range is adjustable between 1°C and 20°C depending on system requirements.

Does the controller support remote monitoring?
No, the controller does not include remote monitoring capabilities or data logging features.