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Thread: SWG wont run on low speed

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    SWG wont run on low speed

    I just installed my first pool. When I fired up the Jandy Aquapure ei I got a no flow message. I flipped my 1 hp pump from low to high and immediately the generator started to work. I am guessing the flow rate at the SWG is too low to run on low speed. Do I have any options other than running the pump on high all the time? Could this be a plumbing issue as there is a 90 about 10 inches before the SWG but I am pretty sure this meets manufacturer recommendations. Any ideas? Thank you

    Radiant Metric 33' 52" AGP (18" in ground)~24500 gallons; Pentair SuperFlo Energy Efficient 1HP Dual Speed Pump; Pentair Tagelus TA100D Sand Filter; Jandy Legacy LRZ400ENN 400,000BTU NG Heater; Jandy AquaPure Ei SWG; 2" Piping rigid above ground and flex below.

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    Mod Squad jblizzle's Avatar
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    Re: SWG wont run on low speed

    there is a chance that with a longer run in front of the SWG/flow sensor it would turn on with the low speed , but no guarantee unfortunately.

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    Jason, TFP Moderator
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    Re: SWG wont run on low speed

    Thanks. Tough to justify re- plumbing without knowing for sure.

    Radiant Metric 33' 52" AGP (18" in ground)~24500 gallons; Pentair SuperFlo Energy Efficient 1HP Dual Speed Pump; Pentair Tagelus TA100D Sand Filter; Jandy Legacy LRZ400ENN 400,000BTU NG Heater; Jandy AquaPure Ei SWG; 2" Piping rigid above ground and flex below.

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    bobodaclown's Avatar
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    Re: SWG wont run on low speed

    It's not recommended, but you may be able to by-pass the flow switch, or maybe see if they offer one with a lower flow rate.
    17K Kidney Shaped Pool Concrete (Diamond Bright) Pool, 3/4 hp 2 speed 115V Sta-rite Duraglas PEA5D-180L/P2R5D-181L (Impeller C105-92PS Diffuser C1-216P), 1.5 piping, Pentair CC100 Filter , Heat Siphon 100K BTU Heat Pump Pool Heater, Flow meter Blue White Flowmeter Model No. F-30150P, Hayward Astrolight SP0581N, SWCG CalimarTitanium Edition TE45 , Dolphin Nautilus Plus with CleverClean, Lakeland Florida

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    Re: SWG wont run on low speed

    Maybe I will call Jandy and see what they say.

    Thanks.

    Radiant Metric 33' 52" AGP (18" in ground)~24500 gallons; Pentair SuperFlo Energy Efficient 1HP Dual Speed Pump; Pentair Tagelus TA100D Sand Filter; Jandy Legacy LRZ400ENN 400,000BTU NG Heater; Jandy AquaPure Ei SWG; 2" Piping rigid above ground and flex below.

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    linen's Avatar
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    Re: SWG wont run on low speed

    Has your sand filter been backwashed recently? My flow is too low for my swg when my filter pressure goes up about 15%(measured on high speed) when running on low.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: SWG wont run on low speed

    Quote Originally Posted by linen
    Has your sand filter been backwashed recently? My flow is too low for my swg when my filter pressure goes up about 15%(measured on high speed) when running on low.
    Yes it has. I just started the pool last week and backwashed a few times to get the rust out of the filter. Now I plan to let it run normally. It might have to do with the plumbing. I didnt plan to have to leave 12 inches between elbows or to have 30 inches between the sensor and the cell so we had to plumb it a bit weird to meet the specs. I might have to call Jandy to see if they have any ideas.

    Radiant Metric 33' 52" AGP (18" in ground)~24500 gallons; Pentair SuperFlo Energy Efficient 1HP Dual Speed Pump; Pentair Tagelus TA100D Sand Filter; Jandy Legacy LRZ400ENN 400,000BTU NG Heater; Jandy AquaPure Ei SWG; 2" Piping rigid above ground and flex below.

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