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Dayton 3M990 condenser fan motor, open frame, 6in shaft

Dayton

Dayton 3M990 Condenser Fan Motor 1/4 hp High Temperature 208-230V 1075 RPM 48YZ Frame 6in Shaft

SKU CH-EHPF-9M1QS

A 1/4 hp high-temperature condenser fan motor running at 1075 RPM on 208-230V with a 6 in shaft and 48YZ frame

  • typeHigh Temperature
  • 1/4 hp motor delivers reliable condenser cooling
  • High-temperature design operates up to 60 °C ambient
  • 208-230 V single-phase power suits standard HVAC supplies
  • 48YZ frame with 6 in shaft fits common cradle-base mounts
  • Auto thermal protection and continuous duty rating ensure safe long-term operation

Motor Purpose and Fit

The Dayton 3M990 is a single-phase condenser fan motor rated at 1/4 hp with a 1,075 RPM nameplate speed. It suits HVAC condenser units that require a 48YZ frame motor with a six-inch shaft for direct-drive fan blades.

Electrical and Mounting Checks

Confirm the supply voltage is 208-230 V AC at 60 Hz and that the circuit can deliver 2.3-2.5 A full-load current. Verify the mounting surface accepts a cradle base and that the installation allows horizontal or vertical shaft-up orientation with an open air-over enclosure.

Build Integration

The motor provides auto thermal protection and Class B insulation for continuous duty at up to 60 °C ambient. Its reversible CW/CCW rotation and 1.0 service factor simplify replacement without rewiring, while the six-inch shaft accommodates standard condenser fan hubs.

Highlights

  • 1/4 hp motor delivers reliable condenser cooling
  • High-temperature design operates up to 60 °C ambient
  • 208-230 V single-phase power suits standard HVAC supplies
  • 48YZ frame with 6 in shaft fits common cradle-base mounts
  • Auto thermal protection and continuous duty rating ensure safe long-term operation

Specifications

BrandDayton
typeHigh Temperature

Questions about this item

Does the Dayton 3M990 motor come with a capacitor or mounting hardware, or do I need to buy them separately?

The supplied data lists only the motor itself; a permanent-split-capacitor design means a run capacitor is required but not included, and the cradle-base mounting uses standard bolts that are not in the box.

Should I choose the 208 V or 230 V wiring for my 208-230 V supply?

The motor is rated for the full 208-230 V range and draws 2.3 A at 230 V or 2.5 A at 208 V, so wire it to whichever voltage your circuit provides.

What does the 1,075 RPM nameplate speed mean once the motor is driving a condenser fan blade?

At 60 Hz the shaft turns at 1,075 RPM under full load; the 48YZ frame and 6 in shaft accept standard condenser blades, and the 1.0 service factor means no extra speed margin above nameplate.

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