Honeywell Infrared flame signal amplifier R7849A1023/U

The Honeywell R7849A1023/U is a solid-state modular infrared flame signal amplifier designed for use with C7027, C7035, and C7044 infrared flame detectors. It operates with 7800 and R7140 series relay modules to indicate flame presence. The amplifier has a flame signal intensity range of 0 to 5.0 V and is configured for its own orientation. It measures 91 mm in width, 85 mm in height, and 23 mm in thickness, weighing 70 g. The ambient temperature range is -40 to 60 °C.

Parts of this type are selected by matching the amplifier to the specific flame detector model and the relay module series. The amplifier connects to the relay module via an edge connector on the printed circuit board, and its orientation must be configured correctly. Before ordering, verify compatibility with the existing flame detector and relay module, and ensure the mounting dimensions and ambient temperature range are suitable for the application.

When items of this kind fail, the equipment may fail to detect a flame, causing the burner to shut down or not start. Symptoms can include a lack of flame signal voltage at the test sockets, intermittent flame detection, or false flame signals. Check the amplifier connections, the flame detector, and the signal voltage to diagnose the issue.