•
Using an erosion feeder with a spa or small body of water
and you are experiencing spiking
•
The ORP sensor is located downstream from the introduc-
tion of the sanitizer (the pH sensor should always be located
upstream from the introduction of the pH balance)
•
With a Watermatic G-1000, G-1000A or G-7500 feeder
B. Acid/Base Feed
The controller is pre-set at the factory to feed acid. If you are
going to feed base, turn off pH switch #8:
pH Dip Switch #8
ON = Acid Feed
OFF = Base Feed
C. Optional Switch Settings
1. Sanitizer Feed Dependent on pH Being Within Range—
pH Switch #1
The controller is pre-set at the factory to allow the ORP to
feed regardless of the pH level.
Turning on this switch will override this feature and allow the
feeding of the sanitizer, only if the pH reading is within the
controller range (above 7.0 or below 8.2). Since the ORP
reading is dependent on the pH (i.e. as the pH rises, the
ORP lowers), this setting avoids oversanitizing as a result of
a high pH level. If the pH is out of range, the sanitizer will
not feed and the pH alert light will illuminate.
2. No ORP and pH Simultaneous Feeding—pH Switch #2
The Controller is pre-set at the factory to allow simultaneous
feeding of pH and ORP.
Turning on this switch will not allow the ORP and pH to feed
at the same time. In some installations, both the sanitizer
and the pH are introduced into the filtration system in close
proximity to each other. When using acid for pH control and
liquid chlorine as the sanitizer, feeding both liquids simulta-
neously could cause chlorine gas bubbles to be created in
the return lines. The ON setting prevents the sanitizer from
feeding until the pH feed cycle is complete.
5
Summary of Contents for Watermatic C-660
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