Honeywell Gas boiler control unit S4565AD1017U

The Honeywell S4565AD1017U is a gas boiler control unit (control box) for atmospheric gas combustion systems. It supports DBI and IP ignition systems and is compatible with Honeywell VK41 and VK4100 series gas regulators and valves. The unit operates on 220–240 V AC, 50 Hz, with a power consumption of 4 W, providing a spark frequency of 40 Hz at 20 kV and a safety time of 5 s. It is rated for ambient temperatures between -15 °C and 60 °C and conforms to EN 298 and EN 60730-1 standards. The control unit features a Molex 3003 connector, an electromagnetic filter, and can be reset via an integral or remote button. It also includes flame monitoring and integrated protection.

Control units of this type are selected based on the gas valve series (VK41 or VK4100) and the supply voltage (220–240 V AC, 50 Hz). The electrical connection uses a Molex 3003/3001 connector, so the harness plug must match. The unit can be mounted in any position; however, the top-mounted connector should remain accessible. Before ordering, confirm that the ignition system type (DBI or IP) and the flame sensor configuration (phase or phase-vertical) are compatible with the existing setup.