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Thread: Amps on a replacement motor

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    kdubya815's Avatar
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    Amps on a replacement motor

    Hello! I need some advice on a replacement motor for my Hayward super pump. A pool store has a pump motor that matches all the specs exactly except for 2 areas
    The old motor amps were 15/7.5 and the SF is 1.1. The new motor I found has amps of 6.0/12 and a service factor of 1.0.
    They told me it was a replacement for the Hayward super pump. Will this motor work? HP, volts, rpm, frame, and hz all match. Any input is greatly appreciated!
    18x36 Grecian style vinyl 23,000 gal inground pool, Hayward Pro Series S220T sand filter, Hayward Super Pump 1 hp.

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    mas985's Avatar
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    Re: Amps on a replacement motor

    What is the new motor make/model number?

    Now might be a good time to get a two speed: STS1072RV1
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    kdubya815's Avatar
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    Re: Amps on a replacement motor

    It's a Century Electric B228SE. I didn't know I could replace it with a 2 speed.
    18x36 Grecian style vinyl 23,000 gal inground pool, Hayward Pro Series S220T sand filter, Hayward Super Pump 1 hp.

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    mas985's Avatar
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    Re: Amps on a replacement motor

    That motor is the large diameter version and would require modification to the motor support. This is the motor you want:

    Century A.O. Smith UST1102 56J C-Face 1 HP Single Speed Up Rated Pool Filter Motor, 15.0/7.5A 115/230V

    But I would seriously consider a two speed:

    Century A.O. Smith STS1072RV1 56J C-Flange 3/4 or 1/10 HP Dual Speed Full Rated Pool Filter Motor, 5.4/2.2A 230V

    There is a pretty big price difference but you should easily get that back with the energy savings.

    Don't forget a new seal.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    morzh's Avatar
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    Re: Amps on a replacement motor

    Just to add to clear confusion on the first post: amps are listed for vokts, so 15/7.5 is listed for 110/230V, but the 6/12 is likely listed in the opposite order, 230/110V, which is OK. You should really look at your HP rating rather than amps, at HP being equal then the lower the amps the better.

    Otherwise you have some good advice here, heed it.

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