Brahma 18000002 SR3 control box

Brahma SR3 18000002 burner control are designed for efficient control of forced-draft gas burners used in both the civil and industrial sectors. Control boxes Brahma SR3 18000002 ensure reliable operation of the burners, guaranteeing safety and efficiency during operation.

Brahma SR3 18000002 automatic control unit are optimal for various applications.

Technical specifications

Supply voltage: 220V (-15% +10%)

50 Hz (±5%)

Operating temperature range: -10°C +60°C

Degree of protection: IP40

Power consumption at startup: 10 VA

Power consumption during operation: 6.5VA

Maximum rated current:

– burner motor: 4 A

– EV valve: 2 A

– ignition transformer: 2 A

– alarm: 1 A

– pre-preparation time (TV): 50 s

– safe time (TS): 3 s

– shutdown time when the working flame is turned off: <1 s

Flame control:

– minimum ionization current: 0.5µA

– recommended ionization current: 7 µA

– voltage on the detection sensor: 300 V

Weight with socket: 550 g

Enclosure protection level – ip 40;

Reaction time < 1 second;

Construction

The components of the control unit Brahma SR3 18000002 are mounted on a pressed frame made of heat-resistant material with high dielectric resistance. The plastic case protects the device from possible damage as a result of accidents, careless opening, dust ingress and contact with the external environment.

Flexible unipolar conductors of different sizes connect the components of the control system, with the exception of the flame detection and pre-purge circuit, which is mounted on a printed circuit board.

Flame control

A transformer having one primary and two secondary windings feeds an electronic flame detection circuit with a low voltage, and a detection sensor with a voltage of about 300 V. 

The great advantage of this power supply system is the presence of constant ionization values, even if the network is operating in real time.

To check the effectiveness of the flame detection circuit, you need to do the following: connect an ammeter with low resistance;

Series-connected resistors must provide a total resistance value of 200 mOhm (for example, 20 resistors of 10 mOhm 1/4 W 5%).

If the control unit is powered by 220 V mains, the measured current value is about 0.5+0.6 µA DC, which leads to the ignition relay being switched on. Lower current values indicate that the circuit is damaged or only partially working.

Certification

The Brahma SR3 18000002 burner control unit, which has been tested and certified in accordance with German standards DIN 4788, Part 3, confirms its compliance with the requirements for power up to 120 kW. In addition, the certification from the “Macintosh and Thermotechnics Laboratory at the Studi ed Esperienze Center” in Rome emphasizes the safety and effectiveness of the SR3 control system in practice. The approval of the Ministry of Internal Affairs for Fire Safety complements this set of guarantees, emphasizing compliance with high standards of safety and reliability of this equipment.