OEM Motors and Cross Refrencing

Chris Beaton is the proprietor of eMotors Direct, a web-based electrical motor retailer revolutionizing the best way HVAC Technicians buy their motor replacements. Their 45 years of expertise, a crew of motor consultants, and entry to North America’s main manufacturers put a wealth of information proper at your fingertips.  

On the authentic set up, all HVAC tools comes with the electrical motors already put in. The OEM purchases motors from producers you possible know to make use of within the design and construct of their HVAC methods.

We all know that electrical motors are most frequently the rationale an HVAC system is working poorly or under no circumstances. However that doesn’t imply you must exchange the entire system, you solely want to seek out the OEM substitute for the motor.

Why Not Buy From the OEM?

You bought the HVAC system from them, why wouldn’t you return to the unique tools producer (OEM) in your motor substitute? There are a number of the explanation why you’ll select to buy your motor substitute elsewhere. 

Get monetary savings – the OEM purchases the motor immediately from the producer. They then mark up the worth to make sure that additionally they earn money on the sale. It can save you cash by skipping the OEM of the HVAC tools and going on to the producer or provider of the motor. 

Availability – By going on to the motor provider, it can save you time by choosing a motor that’s accessible asap. If the OEM of the HVAC system doesn’t have availability, they’ll have to order the motor earlier than sending it on to you. Usually, it is best to have the ability to discover a substitute motor that may be shipped or picked up that day. 

Model Loyalty – You or your consumer might have a most well-liked electrical motor model and select to have model consistency throughout all inventory. This isn’t essentially about one model being higher than the opposite, it’s about reducing your spare stock. When you choose one model to work with, you now not have to hold as many spares readily available for replacements. 

Cross-Referencing OEM Motors

How do you go about discovering the identical motor however from a distinct model? Listed here are two easy methods you possibly can cross-reference your OEM motor to seek out direct replacements. 

Producer Mannequin Quantity

The only, quickest, and most correct approach to cross-reference your OEM electrical motor is through the use of the motor producer’s mannequin quantity. You’ll most frequently discover the mannequin quantity on the motor’s nameplate. Have in mind, although, that many motor nameplates have a number of completely different figuring out numbers. HVAC system producers may put their figuring out numbers on the nameplate together with the motor producer’s catalogue and mannequin numbers. Be sure that the quantity you’re utilizing to cross-reference is the motor producer’s mannequin quantity. 

As soon as you discover the quantity, you possibly can present it to your provider or use a web-based cross-reference device to seek out the motor’s direct replacements. 

Motor Specs

Can’t discover the motor’s mannequin quantity? You possibly can match motor specs as an alternative. Gathering a number of items of knowledge like electrical scores and bodily dimensions will aid you discover the correct substitute. Makes positive to gather as a lot info as attainable and that you just document the data accurately. One small error might have you ever ordering a motor that’s fully improper for the job at hand. 

Electrical Specs:

• Horsepower (HP)
• Voltage (V)
• Variety of speeds
• RPM – document for every velocity if the motor is multispeed
• Single-phase or three-phase
• Service Issue (SF)
• Course of rotation

Bodily Specs:

– If you happen to can’t discover this on the nameplate, document the size and diameter of each the motor physique and the shaft(s).

Mounting

• Stomach band
• Bolt by means of
• Bracket
• Resilient
• Inflexible
• Stud
• Yoke
• Enclosure:

1. Open air over (OAO)

2. Open drip proof (ODP)

3. Completely enclosed air over (TEAO)

4. Completely enclosed fan cooled (TEFC)

5. Completely enclosed non ventilated (TENV)

6. Single or double shaft

Extra Specs to Look For:

1. PSC

2. ECM

3. Capacitor begin

4. Shaded pole

Motor software

• Blower motor
• Fan motor
• Pump motor
• Compressor responsibility motor
• Draft inducer
• Constructing exhaust
• And many others.

After you have collected all the necessary info on the previous motor, you possibly can present it to your provider or use a web-based cross-reference device to seek out the motor’s direct replacements. 

Take a look at this podcast discussing operation of some motors used within the HVAC business 

Abstract

Cross-referencing your OEM electrical motor isn’t as difficult as some may assume. One easy figuring out quantity could be all you want. And in the event you can’t discover the motor’s mannequin quantity, all the data you’ll want to discover the proper substitute is discovered proper on the motor itself.

When changing a belted motor, it is a good suggestion to set and test belt pressure.  This video explains methods to use a belt tensioning device.  

Chris Beaton

Subscribe to the HVAC Know It All app 

Comply with HVAC Know It All on Instagram, Fb, YouTube and LinkedIn and LISTEN to the HVAC Know It All Podcast

Save 8% on purchases at TruTech Instruments with code knowitall (excluding Fluke and Flir merchandise)