Operation Of External Control/Orp Control Board; Figure 17. Movable Orp Jumper J14 - Jandy AquaPure Installation And Operation Manual

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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 field 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.
(Wait at least one (1) minute after applying power. See note 1.)
POS-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 flash "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%.
(Wait at least one (1) minute after applying power. See note 1.)
POS-2
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 flash "EC" every few seconds and chlorine production is disabled.
SUMMARY
POSITION OF J14
POS-1 (default)
POS-2
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 first 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
Connector J15
R0474300
ORP Jumper J14
Figure 17. Movable ORP Jumper J14
24 VAC
Unit OFF, displays EC
Unit ON, displays 0-100%
J 2
0 VAC
Unit ON, displays 0-100%
Unit OFF, displays EC
Wires to the
external
ORP Controller
J 2
Chlorine Generator Power
Interface Board