Brahma 18047156 TGRD91 control box

The design of the Brahma TGRD91 18047156 gas control units, based on KOMPACT series microcontrollers, is specially designed for efficient control of gas atmospheric burners. Brahma TGRD91 18047156 gas control units are designed both for burners with a fan in the combustion circuit and without it, as well as for optimal control of oil atmospheric burners in variable operating conditions.

Non-volatile or non-volatile blocking:

– In case of non-volatile blocking, the controller is restarted only by manually resetting the system.

  – In the case of an energy-dependent lock, restarting the controller requires interrupting the power supply and subsequent recovery, excluding switching the heating device.

Application

  – Suitable for use in combined heating and steam boilers.

  – Hot air generators.

  – Radiation tube heaters.

  – Convector heaters with a fan.

  – Water heaters.

  – Washing machines.

  – Furnaces.

  – Monoblock burners.

Standards

  – The series complies with EN 525, EN 1020 and EN 1319 standards for hot air gas generators.

  – For hot air oil generators – DIN 4794 standard.

Technical data

• Rated supply voltage: 200÷240V @ 50-60 Hz

• On demand: 100÷120V @ 50-60 Hz

• Maximum power consumption: 7W

• Operating temperature: -20 °C ÷ +70 °C

• Protection: IP00

• Max. Weight: 320g

• Standby/pre-purge time (TW/TP): 5 … 10 s

• Safety time during operation: < 1 c

• Waiting time or industrial purge: s 1 … 240 s

• EV2 opening delay (Tdw, opt. W): 1 … 240 s

• Blocking delay due to flame simulation(Tdk, opt. K): 5 … 60 s

• Blocking in case of failure to close the PA (Tdq, opt. Q): 3 … 120 s

• Blocking in case of failure to close TC (Tdq, opt. Q) (7): 3 s … 30’

• Pre-ignition time(Tj, opt. J): 0 … 60 s

• Time after ignition: 0 … 60 s

• Attempts to restart: 1 … 10

• Lacquer coating: On demand

• The presence of a base: no

• Safety time (ts):10 sec

• Dimensions: 11.5×9.5×4 cm

Constructive

The use of an innovative circuit and surface mounting of components significantly reduces the size of the controller circuit board. The plastic case, and if necessary, a varnish coating on the printed circuit board, provide reliable protection of the controller from mechanical damage caused by accidents, pollution, dust and environmental influences.

Additional security features include:

– Varistor: serves as protection against peak voltage in the power grid, including atmospheric discharges such as lightning strikes.

– Internal available fuse: Prevents damage to the controller relay in case of short circuit on outputs such as valves, fans and blocking signals.

– Built-in electromagnetic interference filter: reduces electromagnetic interference generated by the ignition discharge.

– Installation of a resistor: connected in series to the lock output signal, prevents possible errors in connecting remote unlock contacts, providing additional protection for the device.

Functions

Functions of gas controllers Brahma TGRD91 18047156:

1. Flame detection:

– Flame detection based on the properties of rectification (electrode or UV radiation via FD photodiode.. for gas emissions).

– Detection of the appearance of visible light through an FC type photocell.. or UV radiation through the FD photodiode.. for oil emissions.

Technological characteristics:

– Using microcontroller technology to accurately set the ignition time.

– Built-in electronic ignition transformer with high efficiency and remote control.

– The possibility of direct ignition of the burners or the use of an intermittent or intermittent pilot signal.

2. Additional options:

– Support for connecting remote lock and reset signals.

– Indication of the status of the lock and unlock signals using a multi-color LED on the board.

3. Electrical reliability:

– Two safety contacts for controlling the gas valve.

– The service life of the electrical resource is more than 250,000 operations at high temperatures.

4. Protective measures:

– The ability to connect a resistor (100 ÷ 470 kOhm) to the signal blocking output to prevent damage to the controller in case of accidental entanglement of the blocking wires and blocking signal wires.