Switching to Variable speed pump motor

  • Last Post 30 March 2020
Stefanie posted this 23 March 2020

 I currently have a hayward super II pump runing 1.5 hp dual speed motor (Century b977 230v 56J). My motor is shot, and I was thinking of changing to a variable speed pump motor. I have a salt system, so I'm not sure if it's worth the extra cost (southwest Florida I pay about .095 per KWH. I have seen that the salt system will shut down below a certian RPM. I was thinking as long as long as enough hours are run at a higher speed to produce enough chlorine (maybe set it to a higher percentage also) It may have value to switch.

What are my motor options for variable speed? 

Does using the solar make a difference in RPM needed as well.

Thank You, Stef


Order By: Standard | Newest | Votes
Inyohector posted this 24 March 2020

Good morning. Being that your motor currently has a total horsepower of about 2 the ECM27CU would be the ideal replacement variable speed motor for your application. You can adjust the RPM as you would like for both the salt system and solar. Simply test different RPM settings and save as such on the motor control panel mounted to the motor itself. You will have some extra motor power if you need some of it. You can click here to view the motor. Being that you have a Hayward Super II I would use the GOKIT2SALT for the seal kit. 

  • Liked by
  • Stefanie
Stefanie posted this 29 March 2020

Thank you for your reply. Would the ecm16cu work? It's about $100 more than the 2 speed. The ecn27cu is double the price of the b977, and I don't think I'm willing to spend that much. 

Inyohector posted this 30 March 2020

Good morning. Unfortunately, we would not recommend that as technically you would be losing pump strength and flow.