Replacing a motor on a pump, and getting the correct size for your pool?

[mas985]

The SQS1102R is a full rated 1 HP and larger than you need. You need a 1 HP up rated motor (UQS1102R) OR a 3/4 HP full rated motor (SQS1072R) which have an identical 1.25 THP rating.

Yes, you could just get a single speed and run it shorter to save energy but a two speed will save more over the life of the pump and motor. To control a two speed, you can use a manual switch or a two speed timer. Which option you go with depends on how much money you want to spend up front but no matter what, you will make that money back with energy savings.

[mitchryan912]

The SQS1102R is a full rated 1 HP and larger than you need. You need a 1 HP up rated motor (UQS1102R) OR a 3/4 HP full rated motor (SQS1072R) which have an identical 1.25 THP rating.

OK, I think I get it now. I think I'm leaning toward the SQS1072R, as I'm seeing some places say the UQS1102R has been discontinued (looks like HSQ125 is the replacement?) If I went with the SQS1072R, would I need a new impeller and/or diffuser? What about with the UQS1102R or HSQ125?

Yes, you could just get a single speed and run it shorter to save energy but a two speed will save more over the life of the pump and motor. To control a two speed, you can use a manual switch or a two speed timer. Which option you go with depends on how much money you want to spend up front but no matter what, you will make that money back with energy savings.

Any recommendations on two speed timers, or could something be built from standard electrical parts? I'm a former electrician, so I can wrap my head around the electrical side of things.

[mas985]

If I went with the SQS1072R, would I need a new impeller and/or diffuser? What about with the UQS1102R or HSQ125?

HSQ125 may be an issue because of the back end. I can't guarantee that would fit on the motor support.

As for the impeller, it depends on the service factor of your current pump motor. If the current service factor is 1.25 or lower, then the impeller is fine. Diffuser would not change either way.

Timer:

http://www.amazon.com/Intermatic-T10...W61QF3SM3H6H1T

http://www.amazon.com/Intermatic-PE1...BXFB6W5PGHAXZ5

[mitchryan912]

According to the label on the current pump, it's a USQ1102 equivalent, with a SF of 1.25.
IMG_1397.jpg

Thanks for all the help! I think I'm going to get or order the SQS1072 after checking with my local pool warehouse.

[mitchryan912]

Intermatic T10604R Control Center

Am I understanding this right... could this be used to program when the pump is on while also putting a timer on when the pump is switched to a certain speed? Would the main on/off timer feed the switch that determines when the pump is on full speed? That's the sort of thing I'd find handy to have, with manual overrides (if possible.)

[mitchryan912]

Never mind the previous post. I found the wiring diagram on how it works.