VM42 TW30S TS 3S BRAHMA Controller module

Description

VM42 TW30S TS 3S BRAHMA Controller module

Product Dimensions：

Product Description

This module is responsible for the safe and efficient start-up and operation of commercial and industrial heating equipment. Its main functions include:

1. Pre-Purge (TW): Ensuring the combustion chamber is purged of any residual unburnt gas by running the fan for the set pre-ventilation time (30 seconds) before ignition is attempted.

2. Ignition Sequence: Activating the ignition transformer and opening the first gas valve (EV1) for the set safety time (3 seconds).

3. Flame Monitoring: Using flame ionization technology (rectification property of the flame) to prove the presence of a stable flame.

4. Second Valve Control (VM42 Feature): Typically, the VM42 model controls the opening of a second gas valve (EV2) 15-20 seconds after the flame is successfully detected, making it suitable for two-stage or high-capacity burners.

5. Safety Lockout: If a flame is not established within the 3-second safety time (TS), or if the flame is lost during operation, the controller executes a non-volatile lockout, shutting off the gas valves and requiring a manual reset for restart.

The controller is designed for non-permanent operation (intermittent control), meaning it goes through a full safety check and startup sequence for each firing cycle.

Product Specifications

Product Advantages

• High Safety Standard: Compliance with critical European standards (EN 298) ensures reliable and safe operation of gas burners.

• Flame Ionization Control: Utilizes a highly reliable method for flame monitoring, which increases operational security.

• Dual Valve Control (VM42): The ability to independently control two gas valves is essential for modern two-stage burners, offering greater control over burner capacity and efficiency.

• Non-Volatile Lockout: In case of failure, the control locks out and requires a manual reset, preventing dangerous automatic restarts.

• Robust Design: Constructed with a robust housing and often includes an internal varistor for protection against voltage fluctuations, enhancing durability in industrial environments.

Precautions

• Wiring Integrity: Installation and wiring must be performed by qualified personnel, strictly following the wiring diagrams. Incorrect wiring can be extremely hazardous.

• Grounding: Ensure the ground connection of the unit and the ionization electrode is solid and correct, as flame detection relies on a proper grounding path.

• External Fuse: An external line fuse is mandatory for complete protection of the system, as the internal fuse may only protect the controller’s internal relays.

• Flame Probe Placement: The ionization electrode (flame sensor) must be correctly positioned in the flame to achieve the minimum recommended ionization current (typically $\geq 10$ times the minimum) for reliable detection.

• Air Pressure Switch Check: The VM42 must confirm the air pressure switch contacts are closed (indicating sufficient airflow) before proceeding with the ignition sequence.

Product Applications

The BRAHMA VM42 TW30S TS 3S Controller Module is specifically designed for:

• Forced Draught Gas Burners: Its primary application is controlling the automatic start-up and shutdown of gas burners with fans.

• Domestic and Industrial Heating: Widely used in boilers, furnaces, and air heaters for both residential and large-scale industrial heating applications.

• Dual Flame/Two-Stage Burners: The VM42 model is particularly suited for burners that operate at two different power levels (stages) using two independent gas valves.

• Process Heating: Used in industrial processes that require precisely controlled heat input, such as ovens and kilns, where safety and reliable flame supervision are paramount.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

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