Brahma 37106252 CM31F control box

Brahma CM31F 37106252 controllers are designed for efficient control of atmospheric gas burners with a fan, regardless of the presence in the combustion circuit. It can be equipped with a non-volatile or volatile lock: in the first variant, restarting after an emergency lock requires manual intervention, in the second – restoring the controller is possible only through a break in the supply and restoration of power supply.

The CM31F 37106252 control box find their application in various devices such as steam convectors, heating boilers, warm air generators, radiator tubular heaters and water heaters. The flame detection mechanism uses the ionization property without having a protective resistance, which makes contact with the detection electrode unsafe.

Technical specifications

Power supply: 230 V – 50/60 Hz; on request: 110-120 V – 50/60 Hz

Operating temperature range: -20 °C +60 °C

Humidity: max. 95 % at 40 °C

Degree of protection: IP00

Response time in case of flame failure: ≤ 1 s

Minimum ionization current: 1.2 µA

On request: 0.5 µA

Recommended ionization current: 3-5 times the minimum ionization current

Maximum cable length: 1m

Maximum parasitic electrode capacitance: ≤ 1 NF

Maximum short-circuit current: < 200mA AC

Maximum ionization current (230 V 50 Hz): 8 µA DC

Ignition voltage: 20 kV at 30 pF load

Spark repetition rate: 25 Hz

Maximum cable length: 2 m

Recommended discharge distance: 2-4mm

Power consumption: 2.5 VA

Spark energy: 15 MJ

Weight: 170 g

Features

• Flame control based on the rectifying properties of the flame (ionization);

• Two independent safety contacts in series at the outlet of the gas valve (models with manual reset);

• Service life of electrical equipment at max. declared load > 250,000 operations;

• Built-in fully solid-state ignition device with high efficiency;

• EU certification type (CE PIN code 0694BR1154) in accordance with Directive 90/396 on gas appliances and the following amendment to Directive 93/68;

• In accordance with EN 298 (European standard for automatic programming and flame control systems for gas burners);

• Auxiliary contact for low-power ignition or control of the main gas valve in intermittent power control systems (this contact is not isolated from the main supply voltage by reinforced insulation, therefore the relay contact is not suitable for controlling SELV circuits

• Manual reset

• Single flame

• Atmospheric with a fan

Complies with EN298:1993

• Complies with EN298:2003 (2)

• Classification code according to EN 298 (3) FMCLXN

Connection

Connecting controllers becomes an easy process thanks to one-way quick-release connectors, ensuring simplicity and reliability of the connection. Non-reversible connectors with a different number of poles simplify installation, making it more convenient. Quick-release connectors of various sizes are provided for the ignition and detection electrodes, which ensures easy replacement and installation. An ignition device with two outputs allows you to generate a spark at different points or between isolated electrodes. It is important to take into account the voltage relief and the presence of a sufficient number of terminals for grounding and neutral when connecting controllers, which can be either built into the device or located in external junction boxes.