Circupool SWG - Further Reading

Circupool SWG

Circupool is a popular SWG brand due to their competitive pricing and warranty allowing DIY installation. Reports are they also have good tech support and the office is staffed by cordial, friendly people.[1]

Note all gallons and chlorine output below assume the cell is running at 100% 24/7.

SJ Series

  • The SJ is a basic model with only 25% increments for % generation.[2] That may not provide fine enough % control if you get an oversize cell. You will need to use runtime to make finer adjustments to cell chlorine output.

SJ Models

  • SJ15 - 15,000 gallons - 0.65 lbs/day Chlorine
  • SJ20 - 20,000 gallons - 0.87 lbs/day Chlorine
  • SJ40 - 40,000 gallons - 1.60 lbs/day Chlorine
  • SJ55 - 55,000 gallons - 2.30 lbs/day Chlorine

RJ Series

  • The RJ has more precise % increments than the SJ series.[3]

RJ Models

  • RJ16+ - 15,000 gallons - 0.70 lbs/day Chlorine
  • RJ20+ - 20,000 gallons - 0.90 lbs/day Chlorine
  • RJ30+ - 30,000 gallons - 1.50 lbs/day Chlorine
  • RJ45+ - 40,000 gallons - 2.00 lbs/day Chlorine
  • RJ60+ - 60,000 gallons - 3.10 lbs/day Chlorine

RJ+ Features

  • If you get low salt and low flow red lights try rotating the cell with the offset down[4]
  • Blinking flow indicator may be caused by a power interruption.
  • If the control unit doesn't clear faults by being switched off turn the circuit breaker Off and On.

CORE Series

  • The CORE is an all-in-one unit that integrates the controller and flow switch into one component for easier installation. Like the SJ series, it provides 25% increments for % generation. Finer adjustment of output needs to be done by adjusting pump run time.
Circupool Core-55.jpg

Core Models

  • CORE-15 - 15,000 gallons - 0.90 lbs/day Chlorine
  • CORE-35 - 35,000 gallons - 1.40 lbs/day Chlorine
  • CORE-55 - 55,000 gallons - 2.30 lbs/day Chlorine

Core Features

  • You cannot rotate the control head as the cell can only plug in one direction to the controller.[5]
  • The cell also has to be inserted the same other way as it is keyed to it's housing.
  • The flow direction however is bi-directional as the flow switch activates either way.
  • It will automatically recognize 100 to 240vac up to 4 amps.
  • The Core-55 has eight flow channels where the water flows thru over the many plates.
  • The flow sensor is built in, so there is no separate sensor to install.
  • The cell is transparent so to see the water flow and hydrogen gas being generated to be sure that the unit is working.
  • The Core series does not have a lot of the display features and diagnostics that other units have.[6]

Circupool SWG Maintenance Tips

Keep Control Panel Out Of the Weather

Circupool customer support recommends having a roof or shelter over the control. Even though it's designed to be outside and is "waterproof". They say if you want longevity with control keep it out of the elements, direct sun and rain. [7]

Air builds up in SWG cell

  • Check cell is level
  • Check filter pressure and flow. Backwash filter.
  • Put the hump down to help clear out any air from the cell.

Bubbles Around the Plates

  • SWGs generate chlorine gas and hydrogen gas. The chlorine gas dissolves pretty quickly in the water. Hydrogen gas does not dissolve as much. So, if you're watching the returns, you should only see hydrogen gas. If you're watching the plates through clear cell walls, you can see chlorine gas being generated.[8]
  • The bubbles on both sides of the center plate are hydrogen or chlorine depending on the polarity.
  • Bubbles form on the inner walls of the outer plates but not on the outer walls of the outer plates. The bubbles on the center plate are the opposite of the bubbles on the inner walls of the outer plates.
  • Hydrogen gas and chlorine gas are both generated at the surface of the plates.
  • Hydrogen gas is seen as bubbles on one side of the plates and chlorine gas is seen as bubbles on the other side of the same plate.
  • The size of the bubbles is partly dictated by the water flow.
  • Higher flow means smaller bubbles.

What Causes SWG Cells to Explode?

  • SWG's have an explosion risk if the cell is powered and generating when there is no water flow. This can be caused to a stuck flow switch.
  • When a cell explodes, it's due to the combined chlorine and hydrogen gasses.
  • Hydrogen gas needs an oxidizer to burn. Usually, the oxidizer is oxygen, but there's no oxygen available.
  • There's no oxygen, but the chlorine is a better oxidizer than oxygen and produces a faster reaction.