Instruction manual

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Cond Based means that the bleed valve will open until the conductivity of the system drops to the
programmed level. This will delay the biocide add for an unknown amount of time, which will
vary with the starting conductivity and the bleed flow rate.
If you change the Prebleed mode while on this page, you must click on the Submit button in order
to see the correct set of menus.
Prebleed Time
(only appears if Time Based Prebleed is selected)
Type in the text box the amount of time desired for the prebleed. Any value between 1 and 1440
minutes is acceptable.
Prebleed Conductivity
(only appears if Conductivity Based prebleed is selected)
Type in the text box the conductivity value that the controller will try to achieve before feeding the
biocide. Any value between 0 and 10,000 is acceptable.
Prebleed Time Limit
(only appears if Conductivity Based prebleed is selected)
Type in the text box the maximum amount of time for the conductivity based prebleed. If the
prebleed conductivity is not achieved after bleeding the system for this amount of time, then the
controller will start the biocide add. Any value between 0 and 1440 minutes is acceptable.
Interlock Outputs
Click the check boxes to select or de-select the relays that you want to be forced OFF if this output
relay is turned ON. If you do not need any other output to shut off when this relay turns on,
UNCHECK all boxes. The selection is mutually exclusive, meaning that if the Feed output has the
pH output interlocked, the feed won’t turn on if the pH output is on, and the pH output won’t turn
on if the Feed output is already on. This feature should be used with caution since it can
potentially delay a chemical addition for a long time. Typical uses are to prevent inhibitor feed
during a biocide addition, or to prevent bleed and pH control during inhibitor feed.
Output Mode
Click on the radio buttons to manually control the Biocide 1 or 2 relay. The normal selection will
be Auto, where the controller uses the various set points to open and close the relay. You can force
the relay open (pump off) regardless of the set points by selecting Off, or force the relay closed
(pump on) regardless of the set points by selecting Hand.
If you select Off, the pump will not run again until either Hand or Auto is selected! If you select
Hand, the pump will run until either Auto or Off is selected, or until the Hand Time Limit
(programmed in the next menu) expires.
The Off mode is handy to prevent the pump from running while you are changing set points. The
Hand mode is handy to be able to test the pump, wiring, etc without needing to change set points.