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Hey, you're in the home improvement zone--YOUR HANDYMAN ZONE!

Cooling and Ventilation Systems Category:

Evaporative / Swamp Coolers

Problem:

Cooler motor is bad.

Tools / Materials (See Below for Applicability):

  • Appropriate cooler motor (see section on how to identify the right motor size, speed and voltage for your cooler)

  • Appropriate cooler motor cord

  • Screwdriver (or other fastening device as determined by the manufacturer's use of fasteners)

Solution:

A component of the evaporative / swamp cooler, like anything else, that will eventually require replacement is the cooler motor.  The following are steps that you can follow in order to replace an old cooler motor with a new one:

Caution: When dealing with any device that requires electrical power, make sure you take precautions before you work on it, including disconnecting the power.

  1. If you have not already done so in heeding the above cautionary statement, in addition to turning off the power, unplug the plug of the cooler motor, or, if the motor has no plug, disconnect its power wires from the wires that are a part of the cooler, making sure you note what was the arrangement of such wires before you disconnect them for easy re-connections later on. 

  2. In order to remove the cooler motor, you'll need to remove the cooler belt off of its pulley.  To specifically remove the belt, and then, in effect, ultimately the motor, the motor mount--either in bolt form, slide form, or pivot form--must be loosened; as may be applicable, with the use of a fastener device (e.g., a screwdriver), loosen the motor mount fasteners just enough so that the motor, itself, can be pushed toward the pulley of the blower house (which is really the center of the blower house) so as to be able to pull the cooler belt off the pulley system (i.e., two pulleys) with the increased "slack" of such a belt created as a result of this pulling-forward action.

  3. Then, continue to unscrew the motor mount fasteners until you are able to remove the metal clips that go around both sides of the motor as part of securing the motor, itself, to the motor mount.

  4. Once the metal clips are removed, you can now uplift the motor from its mount.

  5. Take a look at the condition of the electrical cord of this old motor, making sure that it is not suffering from oxidation or that it is otherwise damaged; if either is the case, a brand new cooler motor cord should be purchased for use on the new motor.

  6. If the existing electrical cord seems good and usable, then do the following:

i.  Using a fastening device--a screwdriver--unscrew the screws that secure the faceplate of the old cooler motor where the cooler motor cord connects to the internal wires of the motor found there.

ii.  With the new cooler motor, do the same to it as you did with the old cooler motor, which is to unscrew the screws that secure the faceplate of the new cooler motor where the cooler motor cord will ultimately connect with the internal wire terminals found underneath such a faceplate.

iii.  With the faceplate opened to expose the interior wires of the old motor and the faceplate of the new motor opened, too--working with each wire one at a time--pull one wire off the old motor and connect it to the similar terminal and position in the new motor, and then repeat this process with each other wire until you complete the cooler electrical cord wire-connection transfer from the old motor to the new motor.  (As an alternative to this wire-by-wire, step-by-step process, you may opt to label such wires for their respective positions as your preference over the previously mentioned way of transferring the electrical cord wires from one motor to another.) 

For your incidental reference of the wires and terminals you'll be dealing with, as described above, know this:  The red-dotted terminal should connect with the red wire, all of which concerns the low speed of the motor; the white-dotted terminal should connect with the white wire, all of which concerns the common electrical component of the motor system; and the black-dotted terminal should connect with the black wire, all of which concerns the high speed of the motor.

  1. With the cooler electrical cord properly connected to the new motor, attach the new motor to its mount by placing the new cooler into this very mount and then securing the metal clips that go around both sides of the motor with the motor mount fasteners that are just slightly tightened, as more positioning will be needed before final tightening occurs.

  2. Align the pulleys correctly, as applicable.  Pull the new motor toward the pulley of the blower house just as is necessary in order to re-install the cooler belt by "looping" it around both pulleys, one and then the other, and then pull the motor squarely back into place on the motor mount, just barely hand-tightening the mount fasteners.

  3. Before you actually tighten the motor mount fasteners as tight as possible (even with

     

    a fastening device) for the relative future (until another need to remove the motor arises), make sure the motor is positioned into place on the motor mount just enough for the belt, itself, to have about 1/2 to 3/4 of an inch of slack when it is pulled on:  If the belt slack is less than 1/2 of an inch, pull the motor closer to the blower pulley until at least 1/2 of an inch is met in belt slack; if the belt slack exceeds 3/4 of an inch, pull the motor further away from the blower pulley. When you are certain the cooler belt has about 1/2 to 3/4 of an inch of slack when it is pulled on, you can now actually tighten the motor mount fasteners as tight as possible (even with a fastening device) for the relative future (until another need to remove the motor arises).

  4. Take the plug of the cooler motor and plug it into the receptacle for its use or otherwise make the necessary power wire connections of the cord with those of the cooler electrical output, as may be applicable.

That's all it takes to replace your cooler motor with a new one.

 

Ed the Handyman

            &

Your Handyman Zone Team

 

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