Pool Pump Wiring

[Free Tera News]

I want to hook up a pool pump using 230 volts. The pump is a Pentair
WisperFlow pump (A. O. Smith dual voltage E-Plus Centurion Switchless
motor).The wiring diagram on the nameplate seems simple enough, it shows low
voltage and high voltage line connection diagrams.

The low voltage I think I understand, Neutral (grounded return) to L2, and
Hot to L1.

The high voltage diagram confuses me. It still only shows connections for L1
and L2. At this point, since I'll have 2 Hots, and one Neutral, what do I do
with the Neutral?

I have a similar question with another pump (Century 2-Speed, 230 volt).
It's nameplate diagram only shows 3 line connections, Common, High Speed,
Low Speed. So Again, what do I do with the Neutral?

Obviously I've never worked with Motors before. There must be something
pretty basic I'm missing. I'm hoping someone can give some general advice as
to how to interpret typical terminal block diagrams with designations like
A, B, L1, L2, and 1, 2, 3 or 4.

Any help would be appreciated - Bryan

[TakeThisOut]

When you connect a motor at 230v there is no neutral.

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TAKETHISOUT budysbackagain(@)THAT TOO a-oh-ell dot com

[Bob Berryman]

"Free Tera News" <azwr...@prodigy.net> wrote in message
news:3dcd6...@news.teranews.com...

Like "Take This Out" said, your problem should be solved by realizing that
the "neutral" is not used for 240 volt motor connections. The equipment
ground (bare or green wire) still needs to be connected to the green screw
inside the motor terminal box though.

Also, if there is a bond lug on the outside of the motor it needs to be
connected to the swimming pool common bonding grid with a solid #8 copper
conductor.

The motor has 3 windings. The start winding (A,B), and two run windings (1,
2 and 3, 4). If connected for 120 volts (L1 to hot, L2 to "neutral") all 3
windings are connected in parallel, with the start winding (A, B) cutout
after the motor starts, usually by a centrifucal switch. If connected for
240 volts (L1 to hot, L2 to hot) ("neutral" is not used) the run windings
(1, 2 and 3, 4) are connected in series and the start winding (A, B) is
connected in parallel with one of the run windings.....determined by the
manufacturer.

On the two speed motor, L1 can be connected to "common" and L2 connected to
either the "High Speed" or the "Low Speed" terminal, depending on what speed
you want to run, but _not_ both. If the unused speed connection is a wire
(as opposed to a terminal block), just tape or wire nut it off.

Of course, this is just a general description......you should most
definitely wire the motor according to the motor wiring diagram provided by
the manufacturer.