Aligator Owners Operator Manual
3
PART ONE
Aligator Control Unit
Type ali-2
INTRODUCTION
PRINCIPLES OF OPERATION
The unit is managed, timed and controlled by a single chip microprocessor. Permanent
storage is provided by an industry standard Electrically Erasable Programmable Memory.
User control is provided by three simple push buttons, one for display mode change and the
other two for ON/OFF or UP/DOWN as appropriate. The display is a 20 character by 2 row
LCD display with backlight for operation in any location.
Power and electrode connections
The unit is designed to be connected to a permanent power supply 220/240 volts, via the
mains plug. The mains supply should not be timed or interrupted. The unit should be
mounted on the wall within 2 metres of the filter and pump.
The unit is designed to come on twice in a twenty four hour cycle for a time dependant on the
size of your pool. The user must thus set his pump operating time to suit the times in the table
shown under Pool Size Setting display below. Failure to do this will reduce the electrode
operating times and reduce the efficiency of the unit.
The control unit is connected to the electrodes via the grey four core cable. This cable has
four plugs. Two for the electrodes and two for the flow switch, both of which are situated in
the electrode chamber. Identification is simple as both pairs of plugs are distinctly different.
Polarity of either the electrodes or the flow switch is unimportant so the plugs can be fitted
either way.
The unit will operate as soon as power has been established to it and the Pool Size entered
into its computer. However, power to the electrodes will only operate when pump is on.
Electrode timing always starts when the pump starts unless the pump has been off for less
than 30 minutes e.g. for filter cleaning (or automatically after 12 hours if the pump is
continuous).
LCD DISPLAYS
On power-up the unit will display “Welcome to Aligator” for 10 seconds during which time
the electrodes will be off and the electrode current detection circuit will automatically zero
itself.
The first normal screen shown below is then displayed. Changing to other display modes is
achieved by pressing the MODE switch, each time the switch is pressed the screen advances
one display. This allows cycling right round all the screen operations. If the switch is not used
for more than 10 seconds then the unit reverts automatically to the default display (screen one)
electrode current display mode.
