Avansa 300 W

Product detailed description

Automatic backup power supplies are essential components in heating systems where uninterrupted operation is critical for safety and efficiency. Installers working with solid fuel boilers often encounter situations where a power interruption could lead to system failure or overheating. The AVANSA 300W is specifically engineered to address these challenges by providing a reliable secondary power source. It is commonly installed in residential and commercial buildings equipped with solid fuel heating systems, ensuring that circulators continue to operate even when the mains supply is interrupted. The compact design allows for installation in utility rooms, boiler houses, or dedicated electrical enclosures, provided the environment remains dry and well-ventilated.

This device is particularly suited for installations where the primary power supply is unreliable or prone to fluctuations. It is often integrated into systems with multiple circulators, where maintaining coolant flow is vital to prevent thermal stress and potential damage to boiler components. The AVANSA 300W is not intended for use as a standalone inverter or for extended off-grid operation without a mains connection. Its role is strictly to provide temporary support during grid failures, ensuring the connected devices remain operational until the mains supply is restored.

Technical parameters

The AVANSA 300W has a maximum capacity of 500 VA and a rated output power of 300W, making it suitable for driving circulators and small electrical loads. It accepts a wide input voltage range of 150–270 VAC at 45–65 Hz, allowing it to function in varying mains conditions. The output voltage is maintained between 207–241 VAC, closely matching standard mains levels. The switching time of less than 4ms ensures minimal disruption to connected devices during a power outage. For battery support, it requires a 12V DC battery with a maximum capacity of 90 Ah, which is not included in the supply. These specifications are crucial for determining compatibility with existing systems and selecting the appropriate battery size and type.

Installation and connection

Proper installation of the AVANSA 300W involves several key steps to ensure safe and efficient operation. Begin by selecting a dry, dust-free location with adequate ventilation to prevent overheating. The unit must be mounted securely to avoid vibration-related issues and to maintain stable operation. Ensure the installation space allows for unobstructed airflow around the device, especially near the cooling vents.

• Connect the external 12V battery first, ensuring correct polarity: red (+) to the positive terminal and black (-) to the negative terminal. Use metal connectors and tighten them with a wrench to establish a secure connection.
• Before connecting the mains supply, inspect all cables for insulation integrity and signs of wear. Faulty cabling can lead to arcing or electrical hazards.
• Plug the mains cable into a grounded 230V, 50Hz socket after the battery is connected. Avoid plugging in the mains before the battery is properly attached, as this can trigger internal diagnostics incorrectly.
• Connect the device under protection (e.g., a circulator) to the backup power supply’s output sockets. Ensure all connections are tight and free from debris to prevent intermittent contact.
• Power on the unit by pressing and holding the ON/OFF button for 4 seconds. Wait for the system to complete its startup sequence and confirm that the display indicates normal operation.

Always verify the battery voltage before installation and ensure that the battery is fully charged. Failure to follow these steps can result in reduced performance, premature component failure, or safety risks.

Compatibility and accessories

The AVANSA 300W is compatible with a range of 12V lead-acid batteries, which must be sourced separately. The battery should have a capacity not exceeding 90 Ah to match the unit’s charging capabilities. It is important to note that gel batteries are not recommended for use with this model due to differences in charging profiles and potential overcharging risks. Installers should ensure that the selected battery is suitable for deep-cycle applications and is capable of delivering consistent power under load.

For optimal performance, use high-quality cables with appropriate cross-sectional areas to minimize voltage drop and resistive losses. The battery-to-UPS connections should be made using heavy-duty cables with crimped terminals to ensure durability and reliability. Additional accessories such as fuse holders or circuit breakers may be required depending on local electrical regulations and the specific installation setup.

Technical background for designers

The AVANSA 300W operates on a double-conversion principle, continuously converting AC input to DC for battery charging and then back to AC for output. This ensures that the output waveform is a pure sine wave, identical to standard mains electricity, which is essential for sensitive electronic loads such as circulators. The unit includes an automatic voltage regulation (AVR) system that stabilizes the output voltage within acceptable limits, even when the mains supply fluctuates. This helps protect connected devices from voltage spikes or drops that could otherwise cause damage or malfunction.

Internally, the device is constructed using durable materials designed to withstand continuous operation in industrial environments. The housing is typically made of flame-retardant plastic to reduce fire risk, and internal components are arranged to optimize heat dissipation and airflow. The choice of lead-acid batteries is based on their compatibility with the unit’s charging algorithm, which includes temperature compensation and equalization cycles to extend battery life.

Designers should consider the impact of ambient temperature on battery performance and lifespan. Lead-acid batteries are sensitive to both high and low temperatures, and prolonged exposure to extremes can reduce capacity and increase internal resistance. The AVANSA 300W does not include built-in temperature sensors for the battery, so it is advisable to install the unit in a climate-controlled environment if the battery is expected to operate outside standard temperature ranges.

Service and operation

Regular inspection and maintenance are essential to ensure the AVANSA 300W continues to function reliably over its service life. Key checkpoints include verifying the battery voltage, checking for signs of corrosion on terminal connections, and inspecting cables for wear or insulation damage. The unit’s display provides visual indicators of battery status, mains supply condition, and any fault conditions that may require attention.

During routine service, it is recommended to clean the battery terminals with a wire brush to remove any oxidation or debris that could interfere with conductivity. Ensure that all connections are tightened to the manufacturer’s torque specifications to prevent loosening due to vibration or thermal expansion. If the unit emits frequent beeping or displays a fault code, it may indicate an overload condition, battery failure, or internal component malfunction. In such cases, the load should be disconnected, and the battery checked for proper charging and voltage levels.

There are no scheduled service intervals specified in the documentation, but periodic checks are advised, particularly in installations where the unit is frequently used or subjected to harsh environmental conditions. If the battery fails or shows signs of degradation (e.g., reduced capacity, swelling, or leakage), it should be replaced immediately with a compatible 12V lead-acid battery of appropriate capacity.

Frequently asked questions

Can the AVANSA 300W be used with inductive loads such as water pumps?
Yes, but it is recommended to limit the load to 50% of the maximum power rating. Inductive devices can draw significantly higher current at startup, which may exceed the unit’s capacity and trigger overload protection.

Is it possible to connect the AVANSA 300W without a battery?
No, the unit requires a 12V battery to be connected for operation. It will not function as a standalone inverter or without a battery installed.

What happens if the battery voltage drops below 10.8V?
If the battery voltage falls below 10.8V, the unit will shut down to prevent further discharge and potential damage to the battery. This is a protective feature to preserve battery health and prevent deep discharge.

Can the AVANSA 300W be used in flammable environments?
No, the unit should not be installed in areas where flammable gases or vapors are present. The operation of the backup power supply may generate arcs or sparks, which could pose a fire hazard.

How is the switching time of less than 4ms achieved?
The unit uses a double-conversion topology, which allows for seamless transition between mains and battery power. This ensures that connected devices experience minimal disruption during a power outage.

Can the AVANSA 300W be used with a 24V battery?
No, the AVANSA 300W is only compatible with 12V batteries. The 1050W model is designed for 24V battery operation, but this is not applicable to the 300W version.