Dayton Motor Selection Guide

introduction

Motors are used in a wide variety of applications. In some applications more than one motor design would work well. In others, an exact replacement cannot be found but a similar motor with slight differences in mechanical and electrical characteristics will provide reliable operation. The following selelction guide is designed to help you choose the correct motor for your application.

1. Gather Motor Information

You will need the following information to properly select a motor. If you are replacing a motor, much of the information can be found on the existing motor nameplate.

(Sample nameplate) example motor nameplate

Phase: Either single (1) or three (3) phase. Match exactly.
Voltage: Match exactly.
Physcial size/frame: Match exactly.
Frequency (Hz): Match exactly.
Speed (RPM): Match within 5 percent.
Horsepower (HP); Very small motors are often rated in watts. Choose an equal or next higher HP.
Service factor: Choose a motor of equal or greater number.
Motor type (by application): See Step 2.
Enclosure: See Step 3.
Duty cycle: If current motor is intermittent duty, you may upgrade to continuous. Air-over must be installed in the driven fan blade's airstream.
Bearing type: Sleeve or Ball.
Thermal protection: Confirm the Thermal protection information.

Thermal Protection Information

Motors that start automatically (for example, thermostat controlled) after tripping and are located out of operator sight, must be protected against dangerous overheating due to failure-to-start or overloading. This protection may be a separate overcurrent device (for example motor starter) complying with Article 430 of the National electrical code (NEC), a thermally protected motor (internal motor protection), or an impedance protected motor.

Motors with automatic reset thermal protection MUST NOT be used where automatic or otherwise unexpected starting of the motor could be hazardous. Applications where automatic restarting could be hazardous include compressors, conveyors, power tools, farm equipment, and some fans and blowers. Where such a hazard exists, always use a manual reset thermally protected motor.

Step 2: Determine the right section.

by application. Many of the Dayton motors are listed by application (definite purpose) such as washdown, hazardous location, pump duty, etc. Once you know the right section, continue to step 3.

A. General Purpose Motors
B. Definite Purpose Motors
C. HVAC Motors

Step 3: Find the right table

Motors are arranged in each section as follows: First by type/application; second by enclosure or special features within that type.

Example: when looking for a General Purpose 3-Phase TEFC motor, first go to the General Purpose section, then find the 3-Phase motor links, then browse the links to the TEFC pages.

Step 4: Select Specific Motor

Match the information gathered in Step 1 with the motors found from step 3 above.

A. General Purpose Motors section

General Purpose motors are designed for reliable use on a wide variety of applications. They are designed for mechanical loads (also effective for air moving) and for hard-to-start applications such as conveyors, belt driven equipment, machine tools, and reciprocating pumps. These motors feature ball bearings to handle heavier radial and axial loads and heavier construction for industrial applications.

NEMA Premium Efficient Motors

1-Phase ODP/TEFC

1-Phase C-Face ODP/TEFC

Capacitor-Start C-Face ODP and TEFC Motors

3-Phase ODP/TEFC

B. Definite Purpose Motors section

Definite Purpose motors are designed for specific applications, as noted with each motor description.

Washdown

Hazardous Location

Pump Duty

Brushless DC Blower/Control

Universal Type AC/DC Motors

C. HVAC Motors section

HVAC motors are designed for various air moving, and other light to medium-duty applications, such as fans and centrifugal pumps, small tools, and office equipment.

Heating and Ventilation

Belt Drive

Room Air Conditioner

Direct Drive Blower

3.3inch and 4.4inch Diameter

Unit Bearing

Shaded Pole Rear/Front Mount TEAO Unit Bearing Motors

If your application section is not listed..

Choose your motor by its characteristics:

Motor type,
Horsepower,
Speed, and
Enclosure.

Motor Types

Phase	Type	Typical RPM	Starting Torque as Percent of Full-Load Torque	Comparative Efficiency	Typical Uses
1	Shaded Pole	1050, 1550, 3000	Very Low50-100%	Low	Small direct-drive fans and blowers.
1	Permanent Split Capacitor (PSC)	825, 1075, 1625	Low75-150%	Moderate	Direct-drive fans and blowers
1	Split-Phase	1140, 1725, 3450	Low to Moderate 130-170%	Moderate	Belt-drive and direct-drive fans and blowers, small tools, centrifugal pumps, and appliances
1	Capacitor-Start	1140, 1725, 3450	Moderate to High 200-400%	Moderate to High	Pumps, compressors, tools, conveyors, farm equipment, and industrial ventilators
3	3-Phase	1140, 1725, 3450	Moderate to High 200-300%	High	Applications where 3-Phase power is available

Enclosure types

Enclosure type	How can I tell?	Where do I use this enclosure?
Open Dripproof (ODP)/Open	Ventilation holes in shell and/or endshield	Clean, dry, non-hazardous environments.
Enclosed TEFC/TENV	No ventilation holes in shell or endshield.	Dirty, moist, non-hazardous environments.
Hazardous Location	Enclosed. Must have a UL Hazardous Location nameplate on motor frame.	Designed for use in hazardous environments as defined by National Electrical Code (NEC) classifications. NEC Class and Group are designated on UL Hazardous Location nameplate mounted on motor.

Dayton makes General Purpose motors designed for reliable use on a wide variety of applications, HVAC motors for various air moving and Definite Purpose for specific applications.

Proceed to Step 3.

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