Kromschroder Burner control unit IFS135B-5/1/1T 84344510

Kromschroder IFS135B-5/1/1T is an electromechanical burner control unit for gas burners, suitable for ignition and flame monitoring via ionization probe or UV-cell. It operates on 220–240 V supply voltage, has a relay contact output for ignition transformer and valves, and supports direct or pilot ignition. The unit features a reset button with fault indication, is housed in impact-resistant plastic with IP40 protection, and weighs 390 g. It complies with EN 298 safety standard and is designed for ambient temperatures from -20 to 60 °C.

When selecting a replacement control box of this type, verify the supply voltage (e.g., 220–240 V), flame detection method (ionization or UV-cell), and the number of valve connections. Ensure the mounting position is arbitrary as per the original, and check the connector type (plug socket with terminals) to match the existing wiring. The external fuse rating (2 A) and protection class (IP40) must also be compatible with the application.

Typical failures of such control units include failure to ignite, intermittent flame signal loss, or lockout indicated by the reset button. If the burner does not start or shuts down unexpectedly, check the flame sensor (ionization probe or UV-cell) for contamination or damage, and verify the supply voltage and fuse integrity. A faulty unit may also show no response to reset attempts.