The Dayton 1TDR4 is a direct replacement blower motor for the Dayton 4C869. Rated at 271 CFM with dual-speed operation at 1380/1620 RPM, this 230V, 50/60 Hz motor is built for dependable continuous-duty performance. Ball bearings, automatic overload protection, and Class B insulation make it a solid drop-in for HVAC, ventilation, and equipment cooling applications. Also catalogued as NBK Parts 20515.
When a blower motor fails, getting the exact replacement matters. The 1TDR4 matches the physical envelope and electrical specs of the Dayton 4C869, so you can swap it in without fabricating mounts or sourcing adapters. The 8 mm shaft, 5-1/2 in x 5 in flange, and clockwise rotation are factory-spec matches.
Dual-speed operation gives the system flexibility -- run at 1380 RPM for quieter, lower-draw operation or step up to 1620 RPM for full 271 CFM airflow. At only 6 lbs, handling and installation are straightforward even in tight equipment bays.
Runs at 1380 or 1620 RPM. Low speed reduces noise and amp draw; high speed delivers full 271 CFM airflow.
Ball bearings provide longer service life and smoother operation compared to sleeve-bearing motors, especially in continuous-duty cycles.
Built-in thermal overload automatically cuts power if the motor overheats, then resets -- protecting the motor and downstream equipment.
Class B insulation is rated to 130 deg C winding temperature, suitable for sustained operation in warm equipment enclosures.
The 1TDR4 is the current catalog replacement for Dayton model 4C869. Flange dimensions, shaft diameter, rotation direction, and electrical ratings are matched. No adapter plate or shaft modification required for a standard swap.
This motor is also catalogued under NBK Parts number 20515. If you sourced the original through NBK or an industrial distributor, 20515 and Dayton 1TDR4 refer to the same unit.
Maximum inlet air temperature is 104 deg F (40 deg C). Do not use this motor in applications where incoming airflow regularly exceeds this temperature. Applications drawing hot exhaust or recirculated heated air may require a higher-rated unit.