A friend gave me an evaporative cooler for my shop, it did not come with a speed controller.

it has an "Emerson motor" (Mod#S63CXJGE-7627), 2-speed, 1/2 hp, 1750/1140, amp 4.1/2.2, S.F. 1.0, 230 v, 60 hz, 1ph, thermal protected, 40*c amb.
this motor has 4 leads; Lo, Hi, Comm and Grnd.

I bought (in ignorance), a 10amp 230v max. (pot) type, variable speed controller solid state(triac), it has a low speed set screw, it has 2 leads plus the ground.


First off, will this type of (Solid State) controller work for this motor? and If so, how could I wire this.? if it won't work for this motor, don't read anymore,, I just keep rambling on.


The installation schematic for this speed controller shows:

(L1) shows as an AC line into the "(switch // - Triac)", then out to the "controlled load" (I assume that "controlled load" means the Motor?), then from the "controlled load" comes out as (L2) AC line, which bypasses the "(switch // - Triac)", Then shows that the "(switch // - Triac)" itself is grounded.




Is (L1) power from the panel to the switch and then (L2) from motor to panel as the comm.


Would, Should or Could I combine lo/hi from motor to the controller switch, then from the motors comm. Direct to the panel breaker, and ground the grounds.

Thank You

Well, you didn't post a link to the speed controller, so how are we supposed to guess which one it is?

Most speed controllers are designed for "Universal Motors" and motors used in ceiling fans, not induction motors.

Although I was not familiar with them until I did a web search, there is a single phase controller here: Variable Speed Control Frequency Drives for Single and 3 Phase AC Induction Motors - Anacon Systems (http://www.anaconsystems.com/)

The method, I was familiar with was a single phase in 3 phase out type of controller. They have them too. But this would require motor replacement.

The controller is Fantech RPE 210

L1*****A/x/B*****
... *
... FAN
... *
L2**********************To controller


Ground *********ground (on controlller)

You should probably see something like the above. Point B is the "controlled load".


I can't find the specs on the spped controller, so I can't say if it would work. Look for stuff like controls an "induction motor". If it sas PSC then it won't work.

Solid state controller will work as long as it is rated for the proper amperage