Brahma 37200740 VM44G control box

Brahma VM44G 37200740 control boxes are designed for efficient control of forced-draft gas burners or fuel oil burners designed for continuous operation. They provide reliable non-volatile locking, in which restarting is possible only after manual reset of the control.

Among the numerous functions, the ability to connect various types of air dampers manufactured by Brahma or other companies stands out, which provides double flame modulation. This makes the controllers versatile and adapted to various requirements and operating conditions.

Another significant feature of the Brahma VM44G 37200740 relay is the ability to transmit information about the operating cycle through the appropriate cable. This provides operators and engineers with valuable data to monitor and optimize burner processes.

These controllers are ideal for equipping burners used in domestic and industrial single- and dual-flame heating systems. Their high functionality and reliability make them an important element in heating and heat supply systems.

Main Features

EC type certification: Compliance with standards and certification according to EU directives on gas appliances, both before (2009/142/EC) and after (2016/426) April 2018.

Electromagnetic compatibility: Compliance with EU standards for electromagnetic compatibility (EMC) and low-voltage equipment, ensuring electromagnetic immunity.

Compliance with standards: Compliance with various European standards such as EN298 (automatic control systems for gas and oil burners), EN676 (automatic gas burners with forced draft), DIN 4788 (standard for burners with fan) and EN60730-2-5 (automatic control with Class C software).

Connecting remote lock and reset signals: The ability to connect remote lock and reset signals of the device.

Flame detection: The ability to detect a flame based on its properties, including the detection of light and ultraviolet radiation for gas and oil versions of the device.

Electromagnetic valve control: The presence of two independent safety contacts to control the electromagnetic fuel supply valve.

Durability: The maximum declared service life of electrical equipment is more than 250,000 operations.

Flexibility in burner power: No restrictions on burner power, taking into account that the time and operating principles must meet the design requirements.

Precise and reproducible setup: The ability to fine-tune the device sequentially.

Technical specifications

Power supply: 220-240 V – 50-60 Hz

Frequency range: 110-120 V – 50-60 Hz

Storage temperature range: -40°C – +85°C

Humidity: no more than 95% at 40°C

Degree of protection (with socket): IP 40

The presence of a base: yes

Pre-ventilation time (TV/tp): 5 sec

Safety time (ts): 5 sec

Ambient operating temperature: -20 to +70 °C

Weight:0.25 kg

Dimensions:8.5x6x6.5 cm

Power consumption during operation: 30 VA

Construction

The Brahma VM44G 37200740 burner controller uses surface-mounted components to create a “logical core”, which leads to a significant reduction in the size of the printed circuit board. Even in the case of the most complex version of the system, the space occupied remains very limited. Using a microcontroller as a logical core gives the device flexibility in programming and access to a variety of functions.

An important element of the safety and stability of the system is the varistor, which serves to protect the controller from peak voltages in the power grid. These peak voltages can be caused by various factors such as atmospheric discharges such as lightning strikes. The built-in fuse also plays a role in ensuring the safety of the controller, preventing damage in the event of a short circuit at outputs such as solenoid valves, fans and interlock signals. This ensures reliable operation and extends the service life of the system.

Surge protection

Brahma VM44G 37200740 gas firing devices has built-in high voltage protection, which is activated when the supply voltage exceeds the threshold value. If the voltage rises above about 290 VAC (or about 143 VAC in 110-120 VAC versions), the device automatically switches to safe operation mode.

In this safe mode, the device suspends its normal operation, which prevents possible damage or malfunction of the system. To restore normal operation of the device, it is necessary to wait until the power supply voltage drops to about 280 VAC (or about 138 VAC in 110-120 VAC versions), after which the device will automatically reboot.

This function is designed to protect the device from high voltage, which can be especially useful in conditions of unstable power supply or in case of sudden changes in mains voltage.

Undervoltage protection

The Brahma VM44G 37200740 controller also has a safe low voltage protection function. If the supply voltage level decreases to less than 165 VAC (or about 78 VAC in 110-120 VAC versions) during normal operation, the device automatically switches to safe mode.

In safe mode, the device stops its normal operation to prevent damage or unstable operation. After the power supply voltage is restored to about 175 VAC (or about 83 VAC in 110-120 VAC versions), the device will restart automatically.

This function is designed to protect the device from low voltage, which can be an important aspect in conditions of unstable or low power supply, preventing possible problems during operation of the device.