Replacement motor for Tristar VS 900

[Bob109]

I am looking to replace my single speed Super II pump with a variable speed pump. I am considering the TriStar VS 900 which has a 1.85HP motor. I am trying to understand how easy/expensive this pump would be to service down the road. The parts diagram from Hayward lists a motor (part SPX3400Z1ECM), but it is the 2.7HP motor. It also shows a Power End assembly (motor plus electronics/interface) which appears to be the 1.85hp motor which costs almost as much as a whole new pump. I do not see just a 1.85HP motor.

Does anyone know if there is a 1.85 variable speed motor that could be used on this pump?

 

[ajw22]

The drive + motor of a VS pump is where almost all the costs are. The volute wet end is just a few pieces of plastic.

The cost of a drive + motor is almost as much as a new pump.

There are likely to be non-Hayward drives + motors available at lower cost as the market develops. Such as these Nidec Neptune VS motors - Nidec Neptune Variable Speed Motor

 

[Bob109]

Thanks for your reply.

I was asking because I priced out the 2.7HP motor which is sold independently of the electronics for ~$800. The 1.85HP motor sold with the electronics is closer to $1300.

I was considering the Nidec 1.65HP motor to upgrade my current single speed pump, but it also comes with its own electronics which are more limited in function than the Hayward - at least for my plan to control it via relay (it only allows you to use 4 predefined RPMs vs. Hayward's ability to set to any RPM).

The biggest reason I am steering away from the Nidec is that it appears to require significantly more power than the Hayward (rated at 1564 watts at full speed vs 960 watts for the Hayward) despite being a lower rated HP?

 

[1poolman1]

Delete

 

[proavia]

Tell us more about your pool and equipment - pool volume, water features, cleaners, HP of present pump, etc.
It may be beneficial to get the Tristar VS950 instead. The higher HP pump will move the same amount of water at a lower RPM and save electricity doing it.

Think of a VS pump as a variable horsepower pump. The less horsepower you use, the less electricity you use.

 

[Bob109]

Tell us more about your pool and equipment - pool volume, water features, cleaners, HP of present pump, etc.
It may be beneficial to get the Tristar VS950 instead. The higher HP pump will move the same amount of water at a lower RPM and save electricity doing it.

Think of a VS pump as a variable horsepower pump. The less horsepower you use, the less electricity you use.

It is a very simple installation. Pool is 14,000 gallons with 2" suction and 1.5" return lines. Pool equipment at same level as pool and approx 25 feet away. Single skimmer and drain. No water features or cleaner - just a filter (Sta-Rite System 3 S7M400) and heater (Rheem/Raypak) 266K btu. Current pump is Hayward Super II with a 3/4 HP single speed motor with a matching impeller.

 

[1poolman1]

It is a very simple installation. Pool is 14,000 gallons with 2" suction and 1.5" return lines. Pool equipment at same level as pool and approx 25 feet away. Single skimmer and drain. No water features or cleaner - just a filter (Sta-Rite System 3 S7M400) and heater (Rheem/Raypak) 266K btu. Current pump is Hayward Super II with a 3/4 HP single speed motor with a matching impeller.

Less expensive option: Upgrade your impeller and diffuser, get a GO Kit 2, Nidec NPTQ270 motor. Turn the RPM down for long, slow filtration.

Hayward Super II Impeller and Diffuser Upgrade Kit - 2.5 THP - SPX3020CKIT - INYOPools.com

SPX3020CKIT - IMPELLER / DIFFUSSER / UPGRADE KIT

www.inyopools.com

PureLine Hayward Super II Pool Pump Seal Kit - Model GOKIT2 - INYOPools.com

Tune Up Kit Hayward Super II

www.inyopools.com