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Theory of Operation

The Control Station has been designed to monitor and control the CHC treatment system. Its screen
layout has been designed to minimize the need for customer interaction as well as minimize confusion in
screen function and layout. There are User Screens as well as Set Up screens. The Set Up screens will be
configured at the installation and do not require configuration by the user, for this reason, the Set Up
screens are Password protected. The control station continuously monitors the following items:

Conductivity-

The conductivity of the system is monitored continuously with the use of the supplied

Toroidal conductivity probe placed in a continuous water flow on the filtration skid that bypasses the
filter. Allows for control of conductivity based blow down as well as HI and LO alarms placed around
the normal conductivity levels. The Control Station’s range of measurement is 0-8,000 uS. Functions
have been added to allow the calibration of the conductivity sensor to AIR as well as to a higher known
conductivity value liquid.

Blow Down Control-

The blow down is controlled by a blow down set point that is selectable within the

user screens. The blow down utilizes the conductivity valve against the selected blow down settings to
control and maintain the conductivity within the system water. A dead band (found within the Set Up
screens) is utilized to reduce valve opening and closing frequency to lengthen valve life. A simple test
has been added to the Bleed screen that allows for the easy verification of Blow Down Valve operation.

Filter Control-

The filters are monitored continuously and their cleaning routines are controlled by the

Control Station. The number of back washes are shown on the main screen for easy viewing. A Manual
Back Wash initiate feature has been added to the main screen to allow your testing of the back wash
ability of the filter. The filter’s control interfaces with a inlet and outlet pressure transducer as well as the
back flush solenoids to aid in the control and monitoring of the filter.

Pump Monitoring-

The control station can be configured to monitor the power system of the pump, this

includes the power status of the pump, its thermal overload condition as well as monitor the Power Phase
condition of incoming power. The system can be configured to monitor the CHC’s pump’s pressure if
required.

Alarm Indication-

Alerts are shown under their corresponding labels, the alarms have been prioritized to

minimize nuisance alarms. Upon an alarm activation, an output relay of the controller closes to identify
the alarm condition to other customer connected devices.

Alarm Storage-

As alarms occur, they are stored in the control station’s memory for future use. They

can also be stored continuously onto a Micro SD memory card if it is installed in the controller.

Optional Features-

As shown above many of the monitoring features of the pumps can be turned ON

and OFF as required. The station has the ability to communicate in other ways with building control
systems and other communication systems, contact CHC for further information about the communication
abilities. Other features including power control and pH monitoring are also available.

Set UP Screens-

The Set up screens contain the basic system settings needed to configure the operation

of the system. If this system is Purchased, please refer to the supplied Control Station Technical
Reference that will be supplied for your use. Upon failures these passwords can be of help:

Factory Default – (Call EcoWater) User Defaults- 112 or 911

CHC Control Station