ACV A1005254 fan G3G250-gn17-01 CC 510 - 600

The ACV A1005254 fan is a spare part listed under the catalogue category Fans and Flue Gas Exhausters. Parts of this type supply combustion air to the burner and, in room-sealed appliances, also drive the flue gases out of the system. In modulating premix boilers, the fan’s speed determines the firing rate; the burner control varies the fan speed and the gas valve follows the airflow. When selecting a replacement for a fan of this class, the key parameters are the required air flow and pressure, the direction and orientation of the outlet, the impeller diameter, the operating voltage, and the control mode (mains voltage, PWM, or 0–10 V signal). The mounting flange pattern must also match the appliance. Typical failure modes for such fans include worn bearings, imbalance caused by deposits on the impeller, a failed run capacitor, and speed feedback errors that the boiler control reports as an airflow fault. Always confirm the exact specifications and mounting arrangement of the installed fan before ordering a replacement, as variations in orientation and electrical connection are common.