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Thread: 2 speed wiring question

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    2 speed wiring question

    While I am good (enough) with electricity, I have a question about a retrofit.

    If I wire a DPST timer/switch on the common leg of a 220v 2 speed motor, will it still shut the pump off and turn it on?

    If you had to wire a new application 2 speed in (timed on and off) and a polaris booster pump (this needs to be timed too - and only on when pump is on "high"), how would you do it.

    Automation above intermatic mechanical timers is OUT. No Goldine or the like systems.

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    Science and Math Teacher
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    JasonLion's Avatar
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    Re: 2 speed wiring question

    Quote Originally Posted by msumoose
    If I wire a DPST timer/switch on the common leg of a 220v 2 speed motor, will it still shut the pump off and turn it on?
    Yes. You really ought to wire both hot legs to the switch before the speed selector if possible, that is much safer.

    Quote Originally Posted by msumoose
    If you had to wire a new application 2 speed in (timed on and off) and a polaris booster pump (this needs to be timed too - and only on when pump is on "high"), how would you do it.
    You can use a standard timer to do this. Power the timer used to control the polaris from an always hot wire, but run power to the timer switch (which goes to the polaris) from the hot output of the two speed controller. This has the disadvantage of powering both pumps on one breaker.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    mas985's Avatar
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    Re: 2 speed wiring question

    Intermatic makes a two speed timer:

    http://www.amazon.com/Intermatic-T10604 ... c+t106+104

    You can wire the booster to either the high speed, low speed, or the on/off depending on how you want it to operate.
    Mark
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    Re: 2 speed wiring question

    If I wire a DPST timer/switch on the common leg of a 220v 2 speed motor, will it still shut the pump off and turn it on?
    Yes. You really ought to wire both hot legs to the switch before the speed selector if possible, that is much safer.
    If you had to wire a new application 2 speed in (timed on and off) and a polaris booster pump (this needs to be timed too - and only on when pump is on "high"), how would you do it. You can use a standard timer to do this. Power the timer used to control the polaris from an always hot wire, but run power to the timer switch (which goes to the polaris) from the hot output of the two speed controller. This has the disadvantage of powering both pumps on one breaker.
    This is what I had sketched up...but was wondering about the motor itself..thanks.

    So the speed selector switch should be parallel to the timer (after the breaker?), and using the breaker (not the main panel breaker - a breakout box) as a switch for ALL power?
    Science and Math Teacher
    Owner - SPS - part time pool biz
    18x36 IG Vinyl, 23000 Gallons with Jacuzzi (the bane of my existance) pumpworks
    Polaris 280 w/ PB4 booster

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    Re: 2 speed wiring question

    Quote Originally Posted by mas985
    Intermatic makes a two speed timer:

    http://www.amazon.com/Intermatic-T10604 ... c+t106+104

    You can wire the booster to either the high speed, low speed, or the on/off depending on how you want it to operate.
    Yes, but that won't fit this install. I originally was going down that road...
    Science and Math Teacher
    Owner - SPS - part time pool biz
    18x36 IG Vinyl, 23000 Gallons with Jacuzzi (the bane of my existance) pumpworks
    Polaris 280 w/ PB4 booster

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    JasonLion's Avatar
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    Re: 2 speed wiring question

    I was thinking breaker -- DPST master power switch -- switch or timer to control speed -- motor
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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