Controlling Chlorine Residual - Pool Controls SWC Series User Manual

Controlling the Chlorine Residual
There are two ways of controlling the amount of chlorine entering the pool – by altering the
running times and by reducing the chlorine output. If the pool chlorine residual tests high
you can reduce the operating time and/or decrease the output. If the chlorine residual tests
low and the output is already at maximum you will need to increase the operating time
and/or add supplementary chlorine.
Output Control
The LCD display usually shows the amount of chlorine being produced by the Cell as a
percentage of its maximum.
However, this is the not the same as the Output. The Output Control turns the Cell
ON/OFF over a short period of time. The Output setting determines how long the ON time
is – for example if the Output setting is 60% the Cell will be ON for 60% of the period and
OFF for 40% of the period. This is why the Cell will turn ON/OFF periodically if the Output
is set below 100%.
Chlorine Output Menu
To adjust the chlorine output on your system, press ENT to access the Menu system.
Scroll down using the N/DOWN button until CHLORINE OUTPUT is displayed. Press ENT
again to select this menu and then used the Y/UP and N/DOWN buttons to adjust the
output level. Confirm the adjusted settings by pressing ENT once more.
Superchlorination
When bathers enter a pool there is a reaction between nitrogen/ammonia compounds from
the bathers and the chlorine in the pool. These reactions form chloramines (also called
combined chlorine) which are responsible for the "chlorine" odour and for some minor
irritations.
These compounds can be broken down by adding free chlorine to a level above 5ppm by
the addition of a shock dose of chlorine – also known as superchlorination.
Levels of chlorine immediately adjacent to the cell anodes far exceed 5ppm and so a lot of
chloramines are destroyed as water passes the cell.
If the chloramine levels still become high, simply add a shock dose of chlorine or run the
chlorinator for a long period overnight.
Pool Cover Mode On/Off – when chlorine demand is reduced
To adjust the chlorine output to compensate for the use of a cover blanket the unit must be
made aware that a cover blanket is in place over the pool. simply push the button marked
"Pool Cover Mode On/Off" for on and off selection. When the Pool Cover Mode is
activated, the word COVER will flash in the display and the chlorine output will be reduced.
Page
15