EBM PAPST Centrifugal fan RG148/1200-3633-010204 55667.25230

The EBM PAPST RG148/1200-3633-010204 (SKU 55667.25230) is a centrifugal fan designed for use in boilers and gas or oil burners. It supplies combustion air to the burner and, in room-sealed appliances, also expels flue gases. The fan operates during the pre-purge and can be controlled via mains, PWM, or 0-10 V signals. It is intended for stable air delivery to support proper fuel-air mixing and combustion.

When selecting a replacement fan of this type, verify the required air flow and pressure, the direction and orientation of the outlet, impeller diameter, supply voltage, and control mode (mains, PWM, or 0-10 V). The mounting flange pattern must match the burner or boiler. Measure the existing fan's dimensions and electrical connections before ordering.

Typical failures include worn bearings, imbalance from deposits on the impeller, a failed capacitor, and speed feedback errors. These issues may cause the burner control to report an airflow fault, prevent ignition, or result in noisy operation. Check the fan's rotation, voltage supply, and cleanliness of the impeller.