The **FTG-3F-R/Q** is a specific electronic component typically classified within the category of **High-Voltage Ignition Transformers** or **Ignition Modules**, commonly used in gas-fired appliances like water heaters, boilers, and industrial burners. Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. General Specifications The "R/Q" suffix usually denotes specific variations in lead lengths, connector types, or mounting brackets, but the core electronic performance remains consistent. | Feature | Specification (Typical) | | :--- | :--- | | **Input Voltage** | 120V AC or 220V-240V AC (Model dependent) | | **Output Voltage** | >15kV (Peak) | | **Frequency** | 50/60 Hz | | **Duty Cycle** | Intermittent (e.g., 25% or 33% at 3 mins) | | **Output Type** | High-frequency spark discharge | | **Number of Poles** | Single or Dual pole (usually single for this series) | --- ### 2. Core Electronic Components The internal circuitry of the FTG-3F series is designed to convert standard line voltage into a high-intensity spark capable of igniting fuel. * **Primary Coil:** Low-turn copper winding that receives the input AC voltage. * **Secondary Coil:** High-turn, ultra-fine copper winding that steps up the voltage to the kilovolt range via electromagnetic induction. * **Encapsulation (Epoxy):** The internal electronics are potted in a high-dielectric epoxy resin to prevent internal arcing and provide moisture resistance. * **Safety Thermal Fuse:** Often includes an internal thermal cutoff to prevent the unit from melting if the ignition cycle gets "stuck" in the ON position. --- ### 3. Wiring and Connection Interface The unit typically features a standardized wiring color code for integration into HVAC control boards: | Wire Color | Function | Description | | :--- | :--- | :--- | | **Black** | Hot (Line) | AC Power Input | | **White** | Neutral | AC Common | | **Green/Yellow** | Ground | Chassis Earth (Crucial for spark return path) | | **High Voltage Lead** | Spark Output | Thick insulated wire ending in a boot or terminal | --- ### 4. Application Logic In a standard system, the electronics function as follows: 1. **Trigger:** The main control board sends 120V/240V to the FTG-3F. 2. **Induction:** The transformer steps up the voltage instantaneously. 3. **Spark Gap:** The high voltage travels to the electrode, jumping a gap to the burner (ground), creating a plasma arc. 4. **Rectification/Flame Sense:** Once the flame is lit, the control board usually stops power to the FTG-3F to prevent premature component failure. --- ### 5. Troubleshooting Common Electronic Failures * **Weak Spark:** Often caused by carbon buildup on the electrode or a breakdown in the secondary winding insulation. * **No Spark (Humming):** Indicates the primary coil is receiving power, but the secondary side is shorted or grounded internally. * **Cracked Housing:** If the epoxy housing cracks, the high-voltage electricity will "leak" to the nearest metal surface instead of the electrode.