Section 3 – Operating Instructions
12
Section 3. – Operating Instructions
3.1
Checking and Setting the ORP Set Point
1. Press to check the ORP Set Point.
2. Use
the and
keys to change the ORP Set Point.
3. Press to save the new ORP Set Point.
4. To quit without making or saving changes, simply allow the unit to return to the normal display,
which occurs when no keys have been pressed for 10 seconds.
Notes
1. The
easyCHEM 770
controls ORP within a 20mV “control band”. If the Set Point is 700 mV,
the Chlorine pump will start when the reading drops to 680mV and stop again when the
reading reaches 700mV. The control band stops the pump being rapidly switched on and off
when the reading is close to the Set Point, thereby increasing the pump’s life.
2. The exact ORP Set Point to achieve the correct Chlorine level will vary depending on other
chemical factors such as pH, Alkalinity and Cyanuric Acid (stabiliser) levels.
It is imperative that the pool water is checked once a month to ensure that all other
chemical parameters are correct.
3. When first installing the
easyCHEM 770
, check the Chlorine levels every few days using a
Chlorine test kit. Increase the ORP Set Point if the Chlorine level is low and decrease it if the
Chlorine level is high. Once the pool has been fine-tuned over a week or two, the controller will
accurately maintain the correct Chlorine level.
