Honeywell Gas boiler control unit S4564BF1030U

The Honeywell S4564BF1030U is a gas boiler control unit designed for periodic ignition systems of pilot burners. It operates at a supply voltage of 230–240 V AC and is compatible with gas valves from the VR4600 series, including the VR4605 and VR4601 regulators. The unit features a Molex 3003 connection type and includes an electromagnetic filter. It has a service life of 250,000 cycles under maximum load, with 500,000 cycles for the safety valve operator, 6,000 blocking operations, and 1,000 hours of sparking.

Parts of this type are selected by matching the supply voltage, fuel type, and connection type to the existing system. The control unit must be compatible with the specific gas valve series and regulator models in use. Installation orientation can vary within ±90 degrees from the vertical position of the valve operator. Ensure the electrical connections align with the Molex 3003 multi-position connector.

When items of this kind fail, the burner may not ignite or may shut down unexpectedly. Common indicators include the alarm light activating, no spark, or the gas valve not opening. Check the flame detection rod, spark electrode, and electrical connections for faults. If the unit has exceeded its rated cycles or sparking hours, replacement is necessary.