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3.9 Operation of External Control/ORP Control Board

An external device such as an ORP (Oxidation Reduction Potential) controller supplying 24 Volts AC can be

used to control the output of the chlorine generator. The chlorine generator power interface board can be set

upintheeldtooperateintwo(2)differentmodes.Themodeofoperationisdeterminedbythepositionof

amovablejumperJ14.SeeFigure17forlocation.

POS-1 (Wait at least one (1) minute after applying power. See note 1.)

WithJ14jumpersettoPOS-1andnovoltageappliedtotheORP24VACconnectorJ15,the

chlorine generator works normally displaying the production rate of 0% to 100% on the display of

the user interface.

When 24 Volts AC is applied to the ORP 24 VAC inputs, chlorine production will be disabled.

Thedisplayoftheuserinterfacewillthenash“EC”(externalcontrol).Oncethe24Volts

AC input is removed the chlorine generator will return to normal operation. The “EC” will be

replaced with the current production setting of 0% to 100%.

POS-2 (Wait at least one (1) minute after applying power. See note 1.)

Placing the jumper in POS-2 allows the chlorine generator to operate in the opposite way to POS-

1. With 24 Volts AC applied to the ORP 24 VAC inputs, chlorine production will be enabled. The

display of the user interface will display a production rate of 0% to 100%. When the 24 Volts AC

isremovedthedisplaywillash“EC”everyfewsecondsandchlorineproductionisdisabled.

SUMMARY

POSITION OF J14 24 VAC 0 VAC

POS-1 (default) Unit OFF, displays EC Unit ON, displays 0-100%

POS-2 Unit ON, displays 0-100% Unit OFF, displays EC

Note 1 The unit samples the external control/ORP settings at the instant power is applied to the chlorine generator

andwillnotrespondtoanychangesduringtherstminuteofoperation.TheunitmayappeartobeSTUCK

IN or STUCK OUT of “EC” mode. Wait several minutes until the unit has warmed up to verify the changes

made to external control set-up.

Note 2 Multiple chlorine generators can be linked together to be controlled with one ORP controller without the use of

external relays and transformers. Contact the factory for more information.

ORP Jumper J14

Chlorine Generator Power

Interface Board

ORP

Connector J15

R0474300

Wires to the

external

ORP Controller

Figure 17. Movable ORP Jumper J14

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