User Guide

INSTALLATION

Install the HI 9914 controller on a wall, indoors, in a dry area and not

under direct sun light. Assure that liquids can not be sprayed or poured

on it. Fix the controller at a proper height to easily reach the front panels

and fix the 4 screws at the 4 corners.

Install the controller near the tank to keep short the cables of pH

electrode and Conductivity probe.

Assure the proper working voltage.

TANK ASSEMBLY SETUP

HI 9914 can work with different tank volumes and with various complex-

ity of tank assembly. For proper operation of the controller, the tank

assemblies must be set minding the following:

- the pH electrode and EC probe should rapidly detect any modifications

in the water characteristics;

- it is recommended to use a circulation pump to mix water with fertilizer

and acid;

- fertilizer and acid should be added to the water at distance from sensors

to assure good mixing before the measuring point is reached;

- make sure that the pH electrode is always wet;

- the level sensors must be in the correct order, bottom to top: low level,

normal level and high (alarm) level;

- place the sensors in the area with the minimum waves amplitude;

- when a level is reached, the corresponding level sensor will close the

contact;

- the humidity detector must be placed outside the tank, where water

leakage can be detected;

- the inlets for the circulation and the feeding pumps must be under the

minimum water level (low level sensor);

- the normal level sensor must be used in all tank arrangements;

- if the high (alarm) level sensor is not used, leave the pin unconnected;

- if the low-level sensor is not used, connect the corresponding pin to the

common;

- if the humidity sensor is not used, leave the pin unconnected;

- for activate external refill, press the corresponding push-button.