Honeywell Automatic firing device S4564BT1009B

The Honeywell S4564BT1009B is an automatic firing device for gas burners, operating at 230–240 V with a safety time of 55 seconds. It uses ionization flame detection and is designed for applications with DBI or IP ignition systems. The device connects via a Molex 3003 multi-position connector and is compatible with VR4600 series gas valves, including VR4605 and VR4601 models. It fits Viessmann Vitogas 100 type GC1 and Vitogas 050 type GS 0 boilers. The control box supports up to 500,000 safety valve operator cycles, 250,000 cycles under maximum load, 6,000 blocking operations, and 1,000 hours of sparking.

When selecting a control box of this type, ensure the supply voltage matches the burner system (e.g., 230–240 V). The flame detection method (ionization) must be compatible with the burner's sensor. The connector type (e.g., Molex 3001 or 3003) must match the existing wiring harness. Verify the safety time and compatibility with the gas valve series (e.g., VR4600) and the specific boiler model. Installation orientation can vary within ±90° from vertical, and the device must be electrically connected according to the manufacturer's wiring diagram.

Typical failures of such control boxes include failure to ignite, intermittent flame loss, or lockout after safety time. Symptoms may include the burner not starting, the alarm indicator lighting, or the gas valve closing unexpectedly. Check the flame sensor for contamination or damage, verify the supply voltage, and inspect all electrical connections for looseness or corrosion. If the device locks out frequently, test the flame detection circuit and ensure the ionization probe is correctly positioned.