EBM PAPST Centrifugal fan NRV118/3040-3612-030204 55734.32030

The EBM PAPST NRV118/3040-3612-030204 (SKU 55734. 32030) is a centrifugal fan designed for use in boilers, burners, and flue gas systems. It supplies stable combustion air to the burner and, in sealed appliances, expels flue gases. The fan is made of wear-resistant materials and is intended for professional heating equipment.

When selecting a replacement centrifugal fan of this type, verify that the electrical connection, mounting flange, and outlet orientation match the original. Confirm the control signal type (e.g., mains, PWM, or 0-10 V) because a mismatch will prevent modulation and may cause a safety trip. The flange pattern must match the burner or boiler mounting.

Typical failure modes include bearing wear, impeller imbalance caused by dust or debris deposits, capacitor failure, and speed feedback errors. These issues can lead to boiler lockout or errors related to insufficient draft, as the air pressure switch may not confirm adequate airflow.