User Guide

Main power supply connection

Before connecting the unit to the mains, make sure the controller is

completely wired and all the connections for pumps, alarm, probes, etc.

have been done.

• Connect the mains power wires to the power

supply input pins.

• Replace the right panel lid and tighten the four

provided screws.

• Connect the controller to the mains.

CONTROLLER START-UP

Before starting-up make sure the controller has been properly calibrated,

and the pH and conductivity setpoints have been adjusted (see the

following pages).

The pH electrode, conductivity probe and any reference pin must be

properly connected and wired to the controller (see the section above).

The EC probe must be immersed in the solution above the air-vent holes

on the external sleeve, and installed in such a way to minimize the

presence of air bubbles (see probe installation tips at the end of the

manual).

Remove the protective cap from the pH electrode and immerse the

electrode (at least 4cm/1.5") into the solution to be tested. Install the

electrode in such a way that it permanently lies in the solution.

The level sensors, user input, external fill button and humidity sensor

must be connected accordingly with the chosen tank assembly.

If some of the inputs are not used, they must be connected as explained

in the TANK ASSEMBLY section.

The pumps, water nozzle and alarm must be wired as described above.

Turn on the water supply and start the controller by connecting it to the

mains power supply.

The HI 9914 controls different status and gives visual information through

various LED:

- When the dosing pumps are active, the corresponding EC and pH pump

LEDs are on.

- When the circulation or the feeding pump is running, the corresponding

LED is ON.

- When the water nozzle is open, the water nozzle LED is ON.