Kromschroder Burner control unit BCU370WFEU0D3 88600123

The Kromschroder BCU370WFEU0D3 (SKU 88600123) is a burner control unit for industrial forced draught burners with unlimited capacity. It controls, ignites, and monitors the burner in intermittent or continuous operation, supporting both ionization and UV flame detection. The unit operates on a 230 V supply at 50–60 Hz and is rated for ambient temperatures from -20 to 60 °C. It includes an integrated electronic ignition, a pre-purge time of 60 seconds, and a fault lock-out safety feature. The housing is made of impact-resistant and heat-resistant plastic, protected to IP54, and weighs 1.46 kg.

Parts of this type are selected by matching the control unit to the burner's ignition and flame detection arrangement (ionization or UV), the valve control type, and the required safety and purge times. The mains voltage and frequency must match the supply, and the maximum lengths of the ignition cable (1 m) and ionization/UV cable (50 m) must not be exceeded. The unit is a plug-in design with an upper section carrying the operating and display elements and a lower section with connection terminals, earthing strip and pre-wired neutral bus; the wiring chamber must accommodate the existing cable routing. Before ordering, compare the mounting and connection layout of the existing unit and confirm the ambient temperature range and enclosure rating suit the installation location.

Typical failure modes include fault lock-out on flame failure, which stops the burner and requires a manual reset. If the flame signal falls below the switch-off threshold, the unit locks out during operation. Air or gas pressure monitoring faults can prevent start-up or cause lock-out during pre-purge. Check the flame detector (ionization or UV), the air pressure switch, the gas pressure switch, and the wiring to the fan and valve controls, and verify the supply voltage and cable lengths.