Master 4110.335, płytka drukowana CEG

This is a printed circuit board, type CEG, supplied by Master. It is an electronic control board designed for use in the burner or boiler control system. A board of this type sits at the centre of the ignition, flame supervision and modulation sequence: it receives demand signals from a room thermostat or controller, starts the fan for pre‑purge, energises the ignition transformer, opens the gas valve or oil solenoid, reads the flame signal from the ionisation electrode or UV detector, and modulates output via fan speed and fuel valve actuators. It also communicates with safety devices such as the air pressure switch, gas pressure switch and limit thermostats. When selecting a replacement board, the exact manufacturer code and revision level must match the original. Board software versions and connector pin‑outs vary between revisions, so fitting a board with a different code may cause a lockout or incorrect firing sequence. Always check the wiring diagram on the existing board against the replacement; ensure that the sensors and actuators are compatible with the board’s input/output logic. A board of this type is not field‑programmable – it operates with the logic written at the factory for a specific appliance family. After installation, verify the ignition sequence and flame signal strength before leaving the unit in automatic mode.