Replacing single speed motor with two speed. Need wiring help

Islandboy · Sep 25, 2016

Hello fellow DIY'ers. Hoping one of you can help
My pool pump motor kept blowing a fuse on my Hayward PSC 2100 and blew the board. Not finding any repair or replacement parts for the ol' 2100, I was forced to replace it with a Prologic pl ps8. Apparently the problem was the pump motor, not the psc2100 and the motor finally died. It was a SPX1615Z1MNS, which lasted just two years!!!

I've purchased the replacement motor, but I decided to upsize and go with a two speed. I went with the SPX 1620Z2MNS.
My question is how do I wire this motor differently so that I get to enjoy the benefits of two speeds. I understand I have to use a second relay, but wondering if anyone has pictures of what this looks like. I'm looking at the installation manual, but I can't seem to be able to transfer this to the actual wiring in my prologic box.
Any help would be appreciated. Thanks
Mike- IslandBoy

Hayward Pool · Sep 26, 2016

Good day, I have included a picture of how to wire a 2 speed motor to a ProLogic.

Islandboy · Sep 27, 2016

Oh wow. I didn't get a notice that you had answered. Let me look at this closely and I'll ping you back
Thank yo so much

Islandboy · Sep 27, 2016

Hayward pool (sorry don't know your name. I hope you can corroborate my understanding of what I need to do based on the attached pictures and the diagram you just provided
I'm attachin a picture of my current prologic wiring (one speed pump) a second picture of my new (2 speed pump connection panel) and finally a picture of the motor's plate. Based on you diagram I'm going to proceed as follows:
I'll be using AUX3 for my low speed relay,
Step 1. Jump from filter pump relay (position1) to AUX3(pos1)
Step2. jump from filter relay pos2 to AUX3 pos2, then run a second wire out to motor connector 2
Step3. Jump filter relay pos3 to AUX3 pos 3
Step4. Run wore from Filter relay pos4 to motor connector 1
Step5 run wire from AUX3 pos4 to motor connector 3
Run ground wire
Bond
I'm using all AWG12 wire.

Hayward Pool · Sep 29, 2016

I would love to have a conversation on the phone. Everything looks good. 12 gauge is ok. Can you private message your phone number.

Islandboy · Sep 29, 2016

Ok sent you my mobile number
a couple,of disclosures beforehand
i wired everything and programmed the relay on the configuration menu. When I powered up it ran ok in high speed, when I selected low speed, after the requisite 3 minute wait, I heard the motor slow down, but it was also making a weird loud noise. Like grinding but not quite. It ran foe about five minutes in low speed then completely stopped. (At that time I heard a click in the prologic box.
Currently it will only run in high speed mode. If I select low speed i hear the relay click and it just stops.

Islandboy · Sep 30, 2016

Hey. Just wanted to thank you for your help. Everything was wired correctly. The issue was that the low speed wire had come loose at the motor. I suspected that so this morning I pulled it back out (much to my chagrin, there is no easy way to put that northstar back in place once separate) found the loose connection, reconnected and voila. 2 speeds working like magic.
Thanks so much for your help. Your wiring diagram was so much better that what was provided in the installation manual. Perhaps the colors, lol.

mike.