Honeywell Rectification flame amplifier R7847B1064/U

The Honeywell R7847B1064/U is a solid-state, dynamic self-monitoring flame amplifier that operates on the principle of flame rectification. It is designed for use with 7800 series relay modules, responding to flame detector input signals to indicate the presence of a flame. The amplifier connects to the relay module via the edge connector of the printed circuit board and is configured for its own orientation. It has a flame signal intensity range of 0 to 5.0 V and operates in ambient temperatures from -40 °C to +60 °C. The device measures 91 mm in width, 85 mm in height, and 23 mm in thickness, with a weight of 70 g.

Parts of this type are selected by ensuring compatibility with the specific relay module series and checking the amplifier's orientation configuration. The amplifier must be connected via the edge connector of the printed circuit board, and the flame signal intensity range should match the system's requirements. Before ordering, verify the dimensions and ambient temperature range to ensure proper fit and operation in the intended environment.

When items of this kind fail, the equipment may fail to detect a flame, causing the burner to shut down or fail to start. Symptoms can include intermittent flame signal loss or a complete lack of flame indication. To diagnose, check the flame signal voltage at the amplifier's test sockets and inspect the amplifier for physical damage or loose connections.