Section 6 – User Settings
35
6.3.2 Setting the Control Direction, On Time, and Off Time
For most applications, the default Control Direction, On Times and Off Times will be ideal for the
selected pool size. However, some installations may need more On time if there is a continuously
heavy bather load etc and the pump is not keeping up with demand. Other installations may need
more Off time if, for example, the pump is overdosing due to a slow pool turnover time.
6.3.2.1 Setting up the ORP Control function
1. Plug
the
easyCHEM 770
mains lead into the mains power outlet to switch the controller on.
2. Press .
3. Press until “
→
ORP Control
” is selected and press
.
4. The Control Direction menu is now displayed, for example…
Too High
↑↓
>Too Low Enter
The current selection is highlighted by the arrow.
“
Too Low
” means that the
easyCHEM 770
will add Chlorine when the reading gets too low.
“
Too High
” means that the
easyCHEM 770
will reduce the ORP when it gets too high. This is
rare, and not normally used in pool and spa applications.
Press
or
until the desired setting is selected and press
.
5. The current Control On Time is now displayed, for example…
ORP ON Time
6 min
↑↓
Enter
Press
or
until the desired On Time is set and press
.
Enter Zero minutes On time to disable the ORP pump.
6. The current Control Off Time is now displayed, for example…
ORP OFF Time
5 min
↑↓
Enter
Press
or
until the desired Off Time is set and press
.
6.3.2.2 Default ORP Control Settings for Pool Sizes
The following table details the default ORP control settings for the various pool sizes…
Spa
20,000
Litres
50,000
Litres
100,000
Litres
Tube Size
Large Small Large Small Large Small Large Small
ORP On Time
1 min
s
3 mins
1 min
s
6 mins
2 mins
6 mins
5 mins 15 mins
ORP Off Time
5 mins
5 mins
5 mins
5 mins
5 mins
5 mins 15 mins 15 mins