Two Speed Pump Wiring

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W

Wenz

0
Jul 3, 2017
11
Orange County, CA
It looks like I need to get a new motor to replace my 1hp Pentair Whisperflo pump, so I just order the Pentair 1 HP Two Speed Motor 356630S; the ROI on a variable speed pump did not make sense for me. Now I am trying to figure out how to control the two speed pump using my Pentair IntelliTouch System i7+3. I have tried searching this forum and the web, but did not find definitive information. These are the options I think I have:



  1. Use the a Pentair Two-Speed 3 HP Relay, part number 520198. As best I can tell, this is the official way to control a two speed motor with the IntelliTouch. There is a wiring diagram in the manual showing how it should be wired, but it does not have the relay part number. I probably will want this setup because the IntelliTouch can assign high or low speed to certain activities when this relay is used and I think want some activities to always be high, like heating the spa, vacuuming, backflushing. Is the 520198 the correct relay? Has anyone had some success using this relay?
  2. Use a spare relay in the IntelliTouch. I have two spare relays. I found a write up on using a spare relay to control a two speed pump on Inyo: How To Wire A 2-Speed 230V Motor to a Hayward Pro Logic System - INYOPools.com. I think I can make that work for my configuration. I think the downside is that the default mode will be low speed since only one load wire would be attached to the pump relay. Has anyone had success with this option?
  3. Just use a switch on the pump. I think I can just wire up the motor like the current single speed then manually flip the switch on the back of pump. This is the easiest option. I might just do this temporarily while I figure things out and verify if the slow speed will even work for my pool.


I have attached a picture of the IntelliTouch for your reference. I appreciate any help.


Thank you.
 

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Wenz,

Option 1 is the only way to go... You can't use the two spare relays because the IntelliTouch is designed to use the 2-speed relay. If you use the two separate relays, it is possible to have then both energized at the same time and when that happens, you can kiss your new pump good-by.

I use the 2-speed relay, for something else, but it works fine. It is basically a DPDT relay so that when energized you power one speed and when off you power the other speed. It is impossible for both speeds to get power at the same time.

Thanks for posting,

Jim R.
 
Jimrahbe said:
Wenz,

I use the 2-speed relay, for something else, but it works fine. It is basically a DPDT relay so that when energized you power one speed and when off you power the other speed. It is impossible for both speeds to get power at the same time.
Click to expand...

Jim R.
Please share what you are using the 2-speed relay for other than for a 2 speed pump.

You got my curiosity going and I'm thinking I might learn a new trick (or two) :D
 
MyAZPool said:
Jim R.
Please share what you are using the 2-speed relay for other than for a 2 speed pump.

You got my curiosity going and I'm thinking I might learn a new trick (or two) :D
Click to expand...

my,

It is really nothing special.. I bought the relay, several years ago, when I toyed with the idea of using a 2-speed pump, which I never did. Since I had the relay I used it as part of a system to be able to control the heater in my standalone hot tub.

Basically an EasyTouch can control the temperature of a pool or a spa, but of course it does this using the same temperature probe that is normally in the plumbing near the pump. This of course will not work with a standalone spa. I use my extra 2-speed relay to switch between the water temperature in the pool plumbing, when I am in the pool mode, and the probe in my hot tub when I am in the spa mode. I treat the hot tub like you would a pool heater, when it is set to run full hot all the time, but the ET then regulates the spa temperature based upon the set point in my ET. The whole point is to run the spa at about 100 degrees most of the time and then ramp the temperature up to 104 in time for our nightly soak..

Sorry, nothing fancy about this one... :p

Jim R.
 
Jimrahbe said:
Option 1 is the only way to go... You can't use the two spare relays because the IntelliTouch is designed to use the 2-speed relay. If you use the two separate relays, it is possible to have then both energized at the same time and when that happens, you can kiss your new pump good-by.
Click to expand...

Jimrahbe, thank you for the quick response, my understanding how option two would be wired is to have one load wire (120V) coming from the pump relay and the second load wire (120V) coming from the second relay. To turn on low speed only the pump relay is turned on and to get high speed both the pump relay and the second relay are activated. If I am understanding this correctly, you would not have the risk of sending more than 240V. Am I missing something?

I will probably just spend the $100+ to get the two speed relay (thank you kadavis for confirming the part), but wanted to see if I had another option.
 
Wenz,

The IntelliTouch has internal functions to take advantage of the 2-speed relay..

You need a way to shut off power to the low speed when you select the high speed and then shut off the high speed when you select the low speed. I can't see that happening with DPST relays. The Prologic system can do it because of internal programming that the IntelliTouch does not have. This programing will never allow both relays to be on at the same time.

Thanks,

Jim R.
 
Jimrahbe said:
Wenz,

The IntelliTouch has internal functions to take advantage of the 2-speed relay..

You need a way to shut off power to the low speed when you select the high speed and then shut off the high speed when you select the low speed. I can't see that happening with DPST relays. The Prologic system can do it because of internal programming that the IntelliTouch does not have. This programing will never allow both relays to be on at the same time.

Thanks,

Jim R.
Click to expand...

Thank you for the clarification. I will go ahead and get the two speed relay.
 
Jimrahbe said:
my,

It is really nothing special.. I bought the relay, several years ago, when I toyed with the idea of using a 2-speed pump, which I never did. Since I had the relay I used it as part of a system to be able to control the heater in my standalone hot tub.

Basically an EasyTouch can control the temperature of a pool or a spa, but of course it does this using the same temperature probe that is normally in the plumbing near the pump. This of course will not work with a standalone spa. I use my extra 2-speed relay to switch between the water temperature in the pool plumbing, when I am in the pool mode, and the probe in my hot tub when I am in the spa mode. I treat the hot tub like you would a pool heater, when it is set to run full hot all the time, but the ET then regulates the spa temperature based upon the set point in my ET. The whole point is to run the spa at about 100 degrees most of the time and then ramp the temperature up to 104 in time for our nightly soak..

Sorry, nothing fancy about this one... :p

Jim R.
Click to expand...

Maybe nothing fancy or special but certainly you get credit for "thinking outside the box". Nice one.
Take care and thanks!
 

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