How it works ?

The HW-IGN-002 pulse ignition control box is an electronic module designed to safely light a gas burner and confirm that a stable flame is present. It performs two key functions:

1. Generate a high-voltage ignition spark

2. Detect flame presence using ionisation feedback

⚡ 1. High-Voltage Pulse Ignition (Spark Creation)

When the system is powered, the control box converts 220 V AC into a short, high-energy pulse of approximately 16 kV using an internal step-up transformer.

This high-voltage pulse travels through the insulated HV cable (about 1.4 m) to the burner’s ignition electrode.
At the electrode tip, the voltage jumps across a small air gap, producing a spark that ignites the gas-air mixture at the burner.

Key characteristics:

• High voltage, short duration pulses

• Designed for reliable ignition even in high-temperature environments

• Pulsing reduces heat buildup and extends component life

🔥 2. Flame Detection via Ionisation (Flame Sensor Function)

Once the burner ignites, the system must confirm that the flame is stable.
The HW-IGN-002 uses the ionisation principle — a standard method in professional gas appliances.

How ionisation flame sensing works:

• A real flame contains ionised particles (charged ions).

• These ions allow a very small electrical current (microamps) to pass between the flame sensor rod and burner ground.

• When the control box detects this current, it interprets it as “flame present.”

If flame is detected:

• The ignition pulses stop.

• The system remains in “flame-holding” mode.

If no flame is detected:

• The control box continues sparking, or

• The system may shut down for safety (depending on model and appliance design).

🛡️ 3. Safe, Automatic Operation

The combination of pulse ignition and ionisation sensing ensures:

• Reliable startup

• Continuous flame monitoring

• Automatic shutdown if the burner fails to ignite or the flame goes out

This improves safety, energy efficiency, and overall burner performance.