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INTRODUCTION Page 1
IMPORTANT SAFETY INSTRUCTIONS
Specified by ITS Testing Servicesfor Swimming Pools and Spas
1. READ AND FOLLOW ALL INSTRUCTIONS
2. WARNING - To reduce the risk of injury, do not permit children to use this product unless they are closely
supervised at all times.
3. A wire connector is provided on this unit to connect a minimum No. 8 AWG solid copper conductor between
this unit and any metal equipment, metal enclosures or electrical equipment, metal water pipe or conduit within 5
feet of this unit.
4. DANGER - Risk of injury.
a) Replace damaged cord immediately.
b) Do not bury cord.
c) Connect to a grounded, grounding type receptacle only.
5. WARNING - This product must be connected to a power source equipped with a ground-fault circuit interrupter
(GFCI). The GFCI must be tested before each use. With the product operating, open the service door. If the
product stops operating, this merely indicates that the door is equipped with an electrical interlock. Next, push the
test button on the GFCI and close the service door. The product should not operate. Now open the service door,
push the reset button on the GFCI and close the service door. The product should now operate normally. If the
product fails to operate in this manner, there is a ground current flowing indicating the possibility of an electric
shock. Disconnect the power until the fault has been identified and corrected.
6. DANGER - Risk of electric shock. Install at least 5 feet (1.5 m) from inside wall of tub or spa using nonmetallic
plumbing.
7. DANGER - Risk of electric shock. Do not permit any electric appliance, such as a light, telephone, radio, or
television, within 5 feet (1.5 m) of a spa or hot tub.
8. When handling hydrochloric (muriatic) acid, always follow the manufacturer’s handling precautions and
guidelines. Use only as directed.
9. WARNING - To reduce the risk of injury:
a) The water in a spa should never exceed 40ºC (104ºF). Water temperatures between 38ºC (100ºF) and
40ºC (104ºF) are considered safe for a healthy adult. Lower water temperatures are recommended for
young children and when spa use exceeds 10 minutes.
b) Since excessive water temperatures have a high potential for causing fetal damage during early months of
pregnancy, pregnant or possibly pregnant women should limit spa water temperatures to 38ºC (100ºF).
c) Before entering a spa or hot tub, the user should measure the water temperature with an accurate
thermometer since the tolerance of water temperature-regulating devices varies.
d) The use of alcohol, drugs or medication before or during spa or hot tub use may lead to unconsciousness
with the possibility of drowning.
e) Persons suffering from obesity or with a medical history of heart disease, low or high blood pressure,
circulatory system problems or diabetes should consult a physician before using a spa.
f) Persons using medication should consult a physician before using a spa or hot tub since some medication
may induce drowsiness while other medications may affect heart rate, blood pressures and circulation.
10.
SAVE THESE INSTRUCTIONS
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INTRODUCTION Page 2
TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS..................................1
TABLE OF CONTENTS ...........................................................2
CHAPTER I - INTRODUCTION................................................4
Water Maintenance...........................................................4
CONTROLLER FEATURES.................................................5
Integrated Water Treatment..............................................5
Control Functions..............................................................5
Probe Failure Analysis ......................................................5
Remote Communications..................................................5
Remote Operation.............................................................5
CONTROL PANEL ...............................................................6
LCD Display Screen..........................................................6
Display Readings ..............................................................6
Data Entry Keyboard.........................................................6
PROGRAM MENUS.............................................................7
Welcome Screen...............................................................7
Display Screens................................................................7
Main Menus and Submenus..............................................7
Alarm Displays..................................................................7
CHAPTER II – INSTALLATION................................................9
UNPACKING ........................................................................9
INSTALLATION REPORT ....................................................9
TECHNICAL SUPPORT .......................................................9
OVERVIEW ..........................................................................9
CONTROLLER CABINET.....................................................9
LOCATION ...........................................................................9
ELECTRICAL......................................................................12
Electrical Codes..............................................................12
Grounding (GFI)..............................................................12
AC Power Input ...............................................................12
Main Power Interlock.......................................................12
Panel Interlock ................................................................12
PC Boards.......................................................................12
Power Board ...................................................................12
115V/230V Power Transformer.......................................12
Relays and Fuses............................................................15
Fuses for CDCN13 Power Board ....................................15
Fuses for CDCN12 Power Board ....................................15
Remote Alarm .................................................................15
Mother Board ..................................................................15
Sensor Connections........................................................15
Backup Battery................................................................16
Remote Communications................................................16
Multiple Serial Connections.............................................16
4-20 mA Converter Boards..............................................17
PLUMBING.........................................................................18
Installation of Sensors.....................................................18
In-line Installation (2" Pipe)..............................................18
Bypass Line Installation...................................................18
Sensor Cell Cabinet ........................................................19
Water Flow......................................................................19
On/Off Flow Switch..........................................................19
WATER CHEMISTRY SENSORS ......................................20
Sensor Design.................................................................20
pH Sensor.......................................................................20
ORP Sensor....................................................................20
Sensor Installation...........................................................20
Sensor Cables.................................................................20
Electrical Interference......................................................20
Storage and Winterizing..................................................21
Sensor Warranty .............................................................21
TEMPERATURE SENSOR.................................................21
CONDUCTIVITY SENSOR.................................................21
ELECTRONIC FLOW SENSOR .........................................21
Hall effect sensor.............................................................21
Reed switch sensor.........................................................21
PRESSURE TRANSDUCERS............................................21
WATER LEVEL SENSOR ..................................................21
CHEMICAL FEEDERS.......................................................22
Operation........................................................................22
Chemical Feed Pumps....................................................22
Carbonic Acid Valve........................................................22
Erosion Feeder ...............................................................22
CHAPTER III - CONTROLLER OPERATION ........................23
Access ............................................................................23
Default Setup..................................................................23
8 - CONFIGURATION MAIN MENU...................................23
Access ............................................................................23
8.1 - INITIAL SETUP SUBMENU....................................24
8.2 - OPERATIONS SUBMENU .....................................26
8.3 - COMMUNICATIONS SUBMENU ...........................29
1 - CONDUCTIVITY MAIN MENU......................................30
Conductivity and TDS .....................................................30
Conductivity or TDS Display ...........................................30
1.1- Control Mode ...........................................................30
1.2 - Display and Calibration...........................................30
1.3 - Setpoint...................................................................30
1.4 - Low Alarm...............................................................31
1.5 - High Alarm..............................................................31
1.6 - Time Limit ...............................................................31
1.7 - Run Time ................................................................31
1.8. - Select Scale...........................................................31
2 - pH MAIN MENU............................................................32
Operation........................................................................32
2.1- Control Mode ...........................................................32
2.2 - Display and Calibration...........................................32
2.3 - Setpoint...................................................................32
2.4 - Alarm Low...............................................................33
2.5 - Alarm High..............................................................33
2.6 - Time Limit ...............................................................33
2.7 - Run Time ................................................................33
2.8 - Probe Clean............................................................33
3 - ORP MAIN MENU.........................................................34
Operation........................................................................34
3.1 - Control Mode ..........................................................34
3.2 - Display and Calibration...........................................34
3.3 - Setpoint...................................................................34
3.4 - Low Alarm...............................................................35
3.5 - High Alarm..............................................................35
3.6 - Time Limit ...............................................................35
3.7 - Run Time ................................................................35
3.8 - Last Shock..............................................................35
4 - TEMPERATURE MAIN MENU......................................36
Operation........................................................................36
4.1 - Display and Calibration...........................................36
4.2 - Low Alarm...............................................................36
4.3 - High Alarm..............................................................36
5 - FLOW MAIN MENU ......................................................37
5.1 - Water Level Control Mode......................................37
5.2 - Fill Flow Rate..........................................................38
5.3 - Cumulative Fill ........................................................38
5.4 - Bleed Flow Rate .....................................................38
5.5 - Cumulative Bleed....................................................38
5.6 - Influent Pressure.....................................................39
5.7 - Effluent Pressure ....................................................39
5.8 - Main Pump Control.................................................40
6 - ADDITIVES MAIN MENU..............................................41
Operation........................................................................41
6.1.1 - Control Mode .......................................................41
6.1.2 - Time Limit ............................................................42
6.1.3 - Run Time .............................................................42
6.1.4 - Booster/Single Shot.............................................42
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INTRODUCTION Page 3
CONTROL SUBMENUS.....................................................43
X.1 - Control Type...........................................................43
X.Y.1 - Deadband............................................................43
X.Y.2 - Progressive Zone ................................................43
X.1.3 - Automatic Sensor Control .......................................44
X.1.4 - Cycle Timer..........................................................44
X.1.4.2 - Percent of Flow.................................................45
X.1.4.2.3 Bleed Lockout ..................................................45
X.1.5 - Daily Schedule Control ........................................45
CALIBRATION SUBMENUS...............................................46
X.2 - Calibration Options .................................................46
X.2.1 - One-Point Calibration ..........................................46
X.2.2 - Two-Point Calibration ..........................................46
X.2.3 - Three-Point Calibration........................................46
SHOCK AND SAVINGS SUBMENUS ................................47
3.8 - Treatment Selection................................................47
3.8.1 - ORP Shock Program............................................47
3.8.2 - ORP Deshock Program........................................47
3.8.3 - ORP Booster........................................................47
CHAPTER IV - COMMUNICATIONS .....................................48
COMMUNICATION OPTIONS............................................48
REMOTE OPERATION OPTIONS .....................................48
Direct Connection............................................................48
Modem Connection.........................................................48
Computer Software Installation .......................................48
Communication Software Program..................................48
Automatic Scanning ........................................................49
Log Display .....................................................................50
Graphic Data Display......................................................50
TELEPHONE (OPTION TEL) .............................................51
Voice Status Reports.......................................................51
4-20 mA SIGNAL (OPTION -A) ..........................................51
CHAPTER V - STARTUP.......................................................52
CONTROLLER STARTUP..................................................52
Configuration Menu.........................................................52
Alarm Buzzer...................................................................52
Bypass Line.....................................................................52
Battery Check..................................................................52
BLEED AND CHEMICAL CONTROL .................................52
Initial Activation of Sensors.............................................52
Bypass Line Test ............................................................52
Conductivity and Chemistry Adjustment .........................52
Water Sampling ..............................................................52
Conductivity Calibration ..................................................52
pH Calibration .................................................................52
pH Feed (Acid or Base) ..................................................53
pH Setpoint.....................................................................53
ORP Calibration..............................................................53
ORP Setpoint..................................................................53
ADDITIVES Feed............................................................53
Time Limits......................................................................53
Shock Treatment.............................................................53
SATURATION INDEX ........................................................53
CHAPTER VI - MAINTENANCE ............................................54
CONTROLLER MAINTENANCE........................................54
Regular Maintenance......................................................54
The Acid Test..................................................................54
Sensor Cleaning .............................................................54
Winterizing......................................................................54
Battery Replacement ......................................................54
Software Upgrade...........................................................54
CHEMICAL MAINTENANCE..............................................55
Overview.........................................................................55
pH Control.......................................................................55
ORP Control....................................................................55
Limit Timers (Overfeed Safety) .......................................56
Timer Settings.................................................................56
PERIODIC MAINTENANCE...............................................56
Water Testing..................................................................56
Shock Treatment.............................................................57
Deshock (Dechlorination)................................................57
TROUBLESHOOTING .......................................................58
Problems.........................................................................58
Solutions.........................................................................58
PARTS AND ACCESSORIES ............................................59
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INTRODUCTION Page 4
CHAPTER I - INTRODUCTION
AUTOMATION
Congratulations on your selection of an OMEGA CDCN
Programmable Controller for your water treatment facility.
OMEGA CDCN Automation uses the most advanced electronic
sensing technology to monitor and control the critical
parameters for water treatment, i.e. conductivity, pH,
Oxidation-Reduction Potential (ORP) and temperature. Also
available is monitoring of flow rates for make-up and bleed
water and influent/effluent filter pressures.
This Instruction Manual covers the following models:
- CDCN12 with Conductivity control, pH control, Temperature
monitoring, and two (or three) additives programs,
- CDCN13 with Conductivity control, pH control, optional ORP
control, Temperature monitoring, fill and bleed water flow
programs, and four additives programs.
Data logging and remote operation (with an internal modem
and software) are available on all models.
Use the appropriate sections in the manual for each model.
Water Maintenance
Table I - TYPICAL TREATMENT VALUES
TYPICAL WATER TREATMENT
FOR COOLING TOWERS
TEST MIN IDEAL MAX
CONDUCTIVITY,S/cm
TDS, ppm 2,500
pH 7.0 8.5 9.0
ORP, mV 650 750
LANGELIER
SATURATION INDEX
0.0 2.0
5,000
The primary purpose of water treatment is protection of the
equipment from the aggressiveness of water and prevention of
bacteriological growth.
The guidelines for cooling towers include the following:
- Conductivity typically below 5,000 S/cm - corresponding to
Total Dissolved Solids (TDS) of less than 2,500 ppm (mg/l) to prevent precipitation of dissolved salts and corrosion
products,
- pH between 7.0 and 9.0, depending on chemical treatment,
to prevent scaling or corrosion,
- Oxidation-Reduction Potential (ORP) above 650 mV to
prevent algae growth and growth of bacteria, such as
Pseudomonas, E. Coli, etc.,
- proper water balance with Langelier Saturation Index values
between 0 and 0.3 for untreated waters, or up to 2.0 - for
waters treated with phosphonates and/or polyacrylates,
- adequate filtration with a maximum turnover rate of six
hours.
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INTRODUCTION Page 5
CONTROLLER FEATURES
Integrated Water Treatment
Professional water treatment for cooling towers, boilers, and
other industrial applications requires the use of separate
chemical and physical processes to remove undesirable and
harmful components. Until recently, all these different
processes were controlled individually, very often resulting in
operational conflicts and costly treatment problems.
The OMEGA CDCN is an advanced controller that integrates
all the different processes for complete water treatment.
Designed around a sophisticated microprocessor with a large
computer-like LCD (Liquid Crystal Display) screen, it displays
full-size menus and submenus, making it easy to use even for
people with little or no computer experience. All displays and
adjustments are accessible from menu screens that are laid
out in a logical and intuitive order. They can in fact be used
without reference to the instruction manual.
All sensing devices are connected to the control module. This
makes it possible to monitor the status of all operational
parameters at a glance. Also, in case of malfunction or alarm,
the operator is immediately alerted.
All control outputs are also connected to the single control
panel which makes installation and maintenance much easier
than with separate control units.
The central microprocessor manages all monitoring and control
functions, including control of the recirculation pump, chemical
additions, water balance, filter backwash and heater control.
Control Functions
The following display and control functions are available on the
Omega CDCN Controllers:
- Conductivity in microsiemens/cm or as Total Dissolved
Solids (TDS) in ppm or mg/l with programmable bleed,
- Temperature display in degrees Fahrenheit or Celsius,
- pH from 0 to 14 with capability for programmable acid and
base feed,
- Additive Feed for inhibitors, biocides, descalers, etc. - with
choice of feed programs: manual, automatic (bleed & feed or
bleed-then-feed), cycle timer, percent of flow, or daily
schedule controls with bleed and feed lockout, pre-bleed and
pre-pH functions.
- Water Balance and Saturation Condition derived from the
Langelier Saturation Index and showing water balance
conditions as either OK, corrosive or scaling.
In addition, a 24-hour clock/calendar shows the date and time
on the main screen. For other models that do not include all
the functions listed above, only the applicable screens and
menus are displayed.
Probe Failure Analysis
The CDCN introduces a new proprietary technology (US
Patent No. 6,657,546) called Probe Failure Analysis.
Conventional controllers detect probe failure by waiting for an
alarm condition to develop. The CDCN features dynamic
testing of the response of the ORP and pH sensors.
This makes it possible for the controller to detect a probe
failure very soon after the sensor fails to respond properly,
therefore avoiding dangerous out-of-range conditions.
Remote Communications
The CDCN features complete communication remote access
by telephone or by IBM PC-compatible computer under
Windows®. It provides the following capabilities:
- remote operation of controller with exact duplication of the
LCD screen display and full access to all the menus and
submenus,
- voice telephone report of test data,
- remote operational control by touch-tone phone,
- alarm callouts to up to six different pre-selected telephone
numbers,
- automatic scanning of multiple facilities with programmable
download and storage of test data on remote computer.
Remote Operation
- Oxidation-Reduction Potential (ORP or Redox) in
millivolts with programmable oxidizer feed, superoxidation
and chemical savings program,
- Water Recirculation with display of the flowrates for makeup/fill and bleed water in gallons per minute (gpm) or liters
per minute (l/m), cumulative flows in gallons (ga) or liters (l),
- Filtration with display of inlet and outlet pressures and
programmable filter backwashing based on choice of time,
inlet pressure, pressure differential or combinations of the
above.
Unlike controllers that provide only a simulated representation
of the display screen, the CDCN features true remote
duplication of the controller screen.
This means that any change on the CDCN screen is
immediately reproduced on the remote computer screen. And
vice versa, any operation that is performed on the remote
computer is reproduced immediately on the controller.
The same commands are available on both units. This allows
instant verification and adjustment of all control parameters.
Changes in parameter settings are subject to password
verification to prevent unauthorized access.
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INTRODUCTION Page 6
Figure 1 - Control Panel of CDCN13
CONTROL PANEL
LCD Display Screen
The operator operates the controller with the control panel, as
shown in Figure 1 for the CDCN13. It features an LCD display
screen with eight lines of text for menus and submenus and a
16-key data entry keyboard.
NOTE: The CDCN12 display shows only four lines
of text at a time. It can be scrolled with the UP and
DOWN ARROW keys to show all the lines.
The LCD display shows "normal" characters (black on white),
reverse characters (white on black) to highlight selected
options, or flashing characters for alarm conditions.
The brightness of the LCD display screen can be adjusted with
the potentiometer inside the cabinet on the Mother Board. It is
located near the center of the board (R39 for the CDCN13) or
upper right side (R36 for the CDCN12). See the schematics in
Chapter IV - Installation.
The LCD display screen features backlight illumination for
better viewing at night and in dark areas. The backlight stays
on as long as the unit is on.
Display Readings
Line 3 shows an ORP reading of 750 mV with the feed pump
in the OFF mode (X).
Line 4 shows a Temperature reading of 72 F.
Line 5 shows the Flow Rates for make-up/fill and bleed
waters at 15 and 10 gpm respectively, and the fill valve
in Automatic mode (A) and not running (no >).
Line 6 shows the Influent and Effluent Pressures at 25 and
20 psi respectively and the backwash program in the
Manual mode (M).
Line 7 shows control modes of the four Additives: Timer (T)
for additive 1, Daily Schedule (S) for additives 2 and 3,
Off (X) for additive 4.
Line 8 shows the Date and Time and an indication that the
Langelier Saturation Index (LSI) as OK. The line is
highlighted to give access to the Configuration Menu.
Data Entry Keyboard
The data entry keyboard replaces the knobs and switches of
conventional controllers. All operational entries such as choice
of operational mode, calibration, control setpoints, alarms and
programming are performed with the 16 keys of the keyboard.
The keyboard consists of a full 16-key numeric keypad. There
are ten digits from “0" to “9" plus the decimal point “.” for data
entry.
The operator navigates through all the menus and submenus
with the four directional arrow keys: UP, DOWN, LEFT, and
RIGHT.
The Display Screen for the CDCN13 (Figure 1) shows all the
operating features at a glance.
Line 1 shows a Conductivity reading of 2000 S/cm with the
bleed valve in Automatic (A) mode and currently
activated (>).
Line 2 shows a pH reading of 8.5 with the Acid feed mode in
Automatic (A) and not running (no >).
The UP and DOWN ARROW keys move the cursor up and
down each screen - with looping capability at both the top and
the bottom of the screen. The RIGHT ARROW key is used to
enter a submenu. The LEFT ARROW key is used to exit a
submenu and return to the previous menu. The LEFT key can
be pressed repeatedly from any submenu to return to the main
display screen.
The “OK” key is used to confirm numerical data entry.
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PROGRAM MENUS
INTRODUCTION Page 7
Welcome Screen
When power is applied to the controller, the CDCN displays the
Welcome Screen shown to the right. It shows the version of
operating software installed on the controller and the numbers
for Technical Support from the factory by phone 800-872-9436.
Display Screens
The Welcome Screen is followed by one of the display
screens, as shown on the right. The CDCN13 shows 8 lines of
display. The CDCN12 shows 4 lines with additional lines
available with the DOWN ARROW key.
The Display Screen is the normal monitoring screen. It
displays several lines of information, one for each operating
function and one for system conditions.
Each line displays operational information on five columns,
from left to right:
1. operational status (ON or OFF) with a small arrow
indicating outlet activation,
2. function identification: CONDUCTIVITY, pH, ORP,
TEMPERATURE, FLOWS, FILTER, and ADDITIVES,
3. Sensor readings,
4. units of measurement (US or metric),
5. operational mode, represented by a single letter:
A for automatic control,
M for manual operation,
T for cycle timer,
F for percent of flow,
S for daily schedule,
X for OFF.
Welcome Screen
PROGRAMMABLE
CONTROLLER
Version 1.7
TECHNICAL SUPPORT
OMEGA Phone 800-872-9436
CDCN13 Main Display
COND 2000 uS A
pH 8.5 pH A
ORP 750 mV X
TEMP 72 F X
FLOW 15/10 gpm A
FILTER N.A.
ADDITIVES TSFS
06/31/04 19:06 LSI OK
CDCN12 Main Display
COND 2000 uS A
pH 8.5 pH A
TEMP 72 F X
ADDITIVES TSFS
06/31/04 19:06 LSI OK
Main Menus and Submenus
As shown on the Menu Tree next page, there are several Main
Menus that are accessed directly from the Display Screen, one
for each operating function and one for system configuration.
The Submenus are additional menus that are accessed from
the main menus or other submenus.
The four arrow keys located on the front panel keypad are
used to navigate through the menus. To access a submenu,
use the UP and DOWN ARROW keys to highlight the desired
line and press the RIGHT ARROW key. To exit from a
submenu, press the LEFT ARROW key.
In this chapter, menus and submenus are identified by their
line numbers that provide a road map for quick location.
Alarm Displays
Probe failure, out-of-range, overfeed and simulated low
chemical level conditions are indicated on the Display Screen
and on the Main Menus with flashing characters. For probe
failure, the display flashes “Probe” on the corresponding line.
The display flashes for out-of-range, overfeed or simulated low
chemical level alarm conditions. To determine the cause of
alarm, move down with the DOWN ARROW key and enter the
submenu with the RIGHT ARROW key.
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INTRODUCTION Page 8
CONDUCTIVITY
Table II - Program Overview
ACID / BASE
ORP
TEMPERATURE
FLOW RATES
FILTER
ADDITIVES
CONFIGURATION
CONDUCTIVITY
Calibrate
Setpoint
Alarm Low
Alarm High
Time Limit
Run Time
Select Scale
Calibrate
Setpoint
Alarm Low
Alarm High
Time Limit
Run Time
Last Shock
ORP
Calibrate
Setpoint
Alarm Low
Alarm High
Time Limit
Run Time
Probe Clean
pH
MAIN
MENUS
WATER LEVEL
Fill flow
Total
Bleed flow
Total
P influent
P effluent
Main Pump
BACKWASH
Start Date
Start Time
Filter Time
Advance Time
Number of Filters
Limit Timer
Pump Override
ADDITIVES
Inhibitor
Descaler
Biocide
Flocculant
CONTROLS
CONTROL TYPE
OFF
Manual
AutomaticCycle Timer
% of Flow
Daily Schedule
BLEED AND FEED
Feed %
Max Time
Daily Schedule
BLEED LOCKOUT
Lockout %
Lock memory
Pre-bleed
Pre-bleed
Pre-pH
DAILY SCHEDULE
Next date
Cycle (days)
Start time
Run time
Bleed lockout
Last date
CONFIGURATION
Initial Setup
Operations
Communications
INITIAL SETUP
Language
Units
Code No.
Clock
Readings
Data Logging
Model Options
OPERATIONS
Audio Alarms
Bypass Line
Saturation Index
Print Reports
Reset
Battery
Probe Monitor
COMMUNICATIONS
Phone Numbers
Unit I.D.
Alarm Calling
TEMPERATURE
Calibrate
Alarm Low
Alarm High
CALIBRATION OPTIONS
1 Point (zero)
2 Point (slope)
3 Point (curve)
Page 11
INSTALLATION Page 9
CHAPTER II – INSTALLATION
See important safety information on the first page of the
manual.
UNPACKING
Immediately upon receipt of your shipment, check the shipping
carton carefully for damage and report any damage directly to
the shipping company. Please report any shortage
immediately to the factory.
Before opening the carton, check the outside label and verify
the model number and options. Unpack the carton carefully,
taking care not to lose any of the smaller parts, such PVC
fittings.
The controller carton should include the following:
- Controller Cabinet,
- Sensors as required for selected model,
- Instruction Manual and Warranty Card,
- Installation Report to be mailed back to the
factory upon completion of installation,
- PVC fittings and Tees, or optional assemblies.
INSTALLATION REPORT
The Installation Report is a triplicate form designed to assure
warranty coverage, technical updates and factory support.
1. White copy: to mail back to factory.
2. Pink copy: to Facilities Manager.
3. Yellow copy: to Qualified Dealer.
OVERVIEW
The CDCN constitutes an integrated command center for
complete monitoring and control of all water treatment
operations, including chemistry and filtration.
All information provided by the sensors is processed by the
microprocessor on the Mother Board and displayed on the
Main Display screen. Command signals are then sent to the
different control outputs on the Power Board (see
ELECTRICAL below).
The schematic of installation in Figure 2 shows the principle of
installation for the CDCN13.
The schematic of installation in Figure 3 shows the principle of
installation for the CDCN12.
CONTROLLER CABINET
The CDCN controllers are contained in rain proof and splash
proof NEMA Type 4X cabinets. All electronic and electrical
components are mounted inside the cabinet on two separate
PC Boards. Outlets are provided on the bottom of the cabinet
for ½" conduit connectors.
The external dimensions of the cabinets and the positioning of
the mounting holes are shown in Error! Reference source not
found., Figure and Error! Reference source not found.. To
deter unauthorized removal, the mounting holes are accessible
only from the inside of the cabinet. To facilitate installation
however, external mounting ears are also included.
It must be filled out and signed by the Qualified Dealer and the
facilities manager upon completion of installation.
TECHNICAL SUPPORT
Please take the time to read this detailed Instruction Manual to
insure proper installation and operation. If you need further
technical assistance, you can Omega Engineering Inc. at 800872-9436.
LOCATION
The cabinet should be mounted on a wall in a secure location:
- meeting electrical code requirements,
- within 10' (3 m) of the main recirculation line or of the bypass
line - unless special extension cables are used for the
sensors,
- not exposed to direct sunlight as the LCD display screen will
darken at high temperature,
- easily accessible to maintenance personnel,
- if possible, in a separate room, or in a well- ventilated room
as far away as possible from corrosive chemicals and
storage tanks,
- away from power transformers, pump motors or high voltage
power lines,
- safe from unauthorized access or vandalism.
Page 12
INSTALLATION Page 10
Page 13
INSTALLATION Page 11
Figure 2 – CDCN13 Controller Cabinet
Latch
RS232
INSTALLATION MUST FOLLOW
ALL APPLICABLE ELECTRICAL CODES.
On/Off
Figure 3 – CDCN12 Controller Cabinet
RS232
Latch
On/Off
Page 14
ELECTRICAL
INSTALLATION Page 12
Electrical Codes
The controller is available in either hard-wiring or plug-in
configurations. Make sure to use the proper type of wiring
according to the local electrical code, usually the same as for
the chemical feeders.
The internal wiring of the controller is standard US, i.e.:
BLACK HOT
WHITE COMMON
GREEN GROUND
Grounding (GFI)
A grounding lug is provided on the left side of the cabinet. It is
important to connect it to a proper earth ground to prevent
dangerous current leakage and electrical shock. Ground Fault
Interruption (GFI) protection is also strongly recommended for
all installations.
AC Power Input
The CDCN is a dual-voltage controller with a voltage selector
switch located inside the cabinet on the Power Board (see next
page). Before connecting the unit to an external power supply,
make sure that the voltage selector switch is set to the proper
AC power input: 115 V or 230 V.
CAUTION: Damage resulting from improper voltage
selection is not covered by manufacturer
warranty.
Main Power Interlock
To prevent accidental chemical feeding, the controller and the
chemical feeders should always be interlocked - i.e. wired in
parallel - with the manual switch for the main pump so that
there is no danger of feeding the chemicals if there is no water
flow in the recirculation line.
PC Boards
There are two PC boards inside each controller cabinet: a
Power Board (Figure 4 or Figure 6) and a Mother Board
(Figure 5 or Figure 7). They contain all the electrical and
electronic components for the controller. The two boards are
connected together with a flexible ribbon connector.
The schematics for the two boards show the location of the key
components. In addition, all components are also labeled on
the PC boards themselves.
The PC boards are protected with a 1 A fuse that is mounted
on the upper right of the Power Board. If the fuse has to be
replaced, make sure to use a one (1) Amp fuse only. The use
of a larger fuse may cause irreparable damage to the
electronic boards.
Power Board
The Power Board (Figure 4 or Figure 6) is mounted on the
back panel of the controller cabinet. As shown on the
schematic, it contains all the high voltage (115 or 230 V)
circuits and components for inputs and outputs.
115V/230V Power Transformer
The CDCN is equipped with a switchable, dual voltage power
transformer that is mounted on the Power Board inside the
cabinet.
The voltage selector switch is located near the upper right of
the board. Always verify that the switch is set to the correct
voltage, either 115 or 230V. Connecting the controller to
higher voltage may cause damage to the electronics that is not
covered by the manufacturer’s warranty.
Panel Interlock
For safety of operation, a panel interlock switch is mounted
inside the cabinet to shut off all internal power when the control
panel is open.
DO NOT ATTEMPT TO DEFEAT ITS PURPOSE !!!
Page 15
INSTALLATION Page 13
RS232
Fuses
F2 Power Supply
AGC14 Fast Blow
F1 & F3 Main Pump
F4 & F5 Bleed, Additives 2,3,4
Oxi/De-Oxi, Filters
F6 & F7 Remote Alarm
All 5A Slow Blow
F8 & F9 Acid/Base
5A Slow Blow
F10 & F11 Additive 1
5A Slow Blow
Figure 4 – CDCN13 Power Board
RS485
Figure 5 – CDCN13 Mother Board
Page 16
INSTALLATION Page 14
Figure 6 – CDCN12 Power Board
Figure 7 – CDCN12 Mother Board
Page 17
INSTALLATION Page 15
Relays and Fuses
The relays for the chemical feeders and other outputs are all
rated and fused at 5 A Slow Blow. Other signal relays are 2 A
at 30 V.
NOTE: The fuses for the Power Supply to the PC boards are
AGC-1 Fast fuses.
Make sure not to overload these relays. Chemical feed pumps
normally draw less than 5 A. However, if a pump draws more
than 5 A, it will need a motor starter or a magnetic switch.
NOTE: Depending on options selected, not all relays may be
included on the Power Board.
Fuses for CDCN13 Power Board
F2 Power Supply AGC 1 A Fast
F1 & 3 Main Pump 5A Slow Blow
F4 & 5 Bleed / Additives1/2/3
Oxidizer / Probe rinse
Water level / Filters 5A Slow Blow
F6 & 7 Alarm 5A Slow Blow
F8 & 9 Acid / Base 5A Slow Blow
F10 & 11 Additive 4 5A Slow Blow
Fuses for CDCN12 Power Board
F1 Power Supply AGC 1 A Fast
F2 & 3 Additive 1 5A Slow Blow
F4 & 5 Acid / Base 5A Slow Blow
F6 & 7 Additive 2 5A Slow Blow
F8 & 9 Bleed Valve 5A Slow Blow
Remote Alarm
Mother Board
The Mother Board (Figure 5 or Figure 7) is mounted directly
behind the face panel of the controller and contains all the low
voltage circuitry including the microprocessor and program
chips, the LCD display and the keyboard pad. It is also used
to connect all the sensors inputs.
The key electronic components are the microprocessor and the
programmable chips for Program, Display, Memory plus the
two voice option chips, Voice 0 and Voice 1. The program
chips are located in the center at the very top of the board.
They can be replaced for upgrading of the software program
but this should be done only by an experienced electronic
technician.
Sensor Connections
The pH and ORP sensors are connected to the outside of the
cabinet with bulkhead BNC connectors. The other sensors are
connected directly to the Terminal Barrier strips marked TB1 to
TB5 on the Mother Board, as shown on Figure 5. The
following list applies to the CDCN13
TB1 - Level control sensor and on/off flow switch
5= LOW White wire from level sensor
4=GND Black wire from level sensor
3= Flow Flow switch wire
2= GND Flow switch wire
1= +5 VDCRed wire from level sensor
TB2 - Pressure transducer
4=In White wire from influent transducer
3= Out White wire from effluent transducer
2=GND Black wire
1=24vdc Red wire from transducers
On the CDCN13, the remote alarm is a 5A DPDT relay located
on the upper right corner of the Power Board. The remote
alarm relay can be set for dry or hot contacts, or for any
external signal.
To avoid damaging the Power Board, make sure to use the
right type of contacts. Call your dealer or the factory if you
are not sure.
With hot contacts, the controller powers the alarm with 110 or
230V, depending on the setting of the input voltage selector
switch (see preceding page). Connect the leads to the alarm
to the Normally Open contacts (NO1 and NO2) on the terminal
strip located next to the alarm relay.
With dry contacts, remove the shunts from J4 and J5 located
below fuses marked F7 and F6. Wire the remote alarm to NO1
and C1.
For an external power source, wire the input power to the
terminals marked NC1 and NC2. Wire the remote alarm to the
normally open contact (NO1 and NO2). The alarm voltage will
be the same as the external power source
TB3 - Bleed water flow pulser
Hall-effect Reed switch
3=+5vdc Red wire to TB4 +24vdc N/A
2=Bypass White wire Red wire
1=GND Black wire Black wire
TB4 - Fill water flow pulser
Hall-effect Reed switch
3=+24vdc Red wire N/A
2= Main White wire Red wire
1= GND Black wire Black wire
TB5 - Temp & Conductivity, pH, ORP
8 = TDS red
7 = TDS black
6 = TEMP green & GND
5 = TEMP white
4 = pH shield
3 = pH signal
2 = ORP shield
1 = ORP signal
TB6 – RS485 Communications
TB7 - RS232 Communications
5 = Green
4 = Brown
3 = Black
2 = White
1 = Red
Page 18
INSTALLATION Page 16
Backup Battery
The 3V Backup Battery is located on the upper left of the
Mother Board. It is used to maintain the memory settings in
case of loss of AC power. This battery is designed to last for
several years in normal operation and for up to six months if
the AC power is shut off.
Under normal conditions, the controller will operate without
battery power. However the clock and other memory settings
will have to be restored in case of complete power shutdown.
The battery should be replaced if the voltage falls below 2.6 V.
This can be verified at any time in the Configuration Menu
using the Battery Submenu.
Remote Communications
The Remote Communications option connects the modem with
a standard US-type, 6-position RJ12 phone jack located on the
lower right of the Mother Board.
If possible, the controller should be connected to a direct
outside phone line dedicated for remote operation. If the
phone line is also used for voice communications, users should
wait for at least three rings to allow the modem to answer
before picking up the phone.
The modem is a combination Data/Fax/Voice multimedia
device registered by the Federal Communications Commission
(FCC), Number B46USA-22429-MN-E.
As shown in Figure 8, the host controller includes a modem
and an RS485 connection (Option REM). It is connected to the
phone line by modem or to a computer equipped with an
RS485 communication card. The slave units need only the
RS485 connection.
Any controller can be set up at any time as either host or slave
using the set of jumpers marked on the motherboard:
- Jumper J9 for CDCN13 controllers
(effective Rev. 7), or
- Jumper JP3 for CDCN12 controllers
(effective Rev. 2).
All slave units must be located within 3,000 feet of the host
controller and connected with two Category 5 wires (one pair).
The RS485 terminal has four terminals of which only the ones
marked A and B are used. Each unit must be wired A to A and
B to B for proper communications. The slave units can be
connected directly to the host unit or through any other slave
units.
CAUTION: Do not wire the connections marked 24 VDC or
GND on the RS485 terminal. This could cause serious
damage to the terminal.
MODEM SPECIFICATIONS
FCC Registration Number
B46USA-22429-MN-E
The Ring Equivalency Number (REN) is 0.2 A. Most telephone
companies require that the sum of all devices connected to a
telephone line do not exceed 5. If a problem arises as a result
of operating this equipment, you may have to provide
information about this modem to the telephone company or to
the FCC. If the equipment causes disruption to the telephone
network, the telephone company may disconnect your service.
Ring Equivalency Number
(REN)
0.2 A
Multiple Serial Connections
Up to thirty (30) CDCN controllers can be connected to a single
phone line or a single computer line by using a network
consisting of one host and many slaves through RS485 Serial
Connections (Option RS485).
Different models of CDCN controllers can be mixed and
matched in a network. Each controller is identified by an I.D.
number that is set up through software in the Communications
Submenu 8.3.2.
Figure 8 - Multiple Controllers Connections
Page 19
INSTALLATION Page 17
4-20 mA Converter Boards
The 4-20 mA Converter Boards are two optional boards, one
for sensor readings and one for control outputs. They convert
the digital outputs of the controller into analog signals that can
be used by analog monitoring and control equipment.
The two boards are identical and are normally installed at the
factory on the motherboard, as shown in Figure 9. The
location on the motherboard determines the function, i.e.
sensor signal or control outputs. Either board or both can be
installed, depending on requirements.
If the boards are installed properly, the controller software
automatically shows the 4-20 mA menu line in the Submenu
8.3 - Communications.
Field Installation
For field installation, turn off all power to the controller.
Position the converter board on top of the motherboard as
shown on Figure 9. Press the electrical connector J21 into the
socket of the motherboard marked JP1 (or JP2 depending on
option) and the three plastic standoffs fittings into the three
corresponding holes on the motherboard.
Figure 9 - Installing 4-20 mA Converter Boards
4-20 mA Connections
Figure shows the connections for each Converter Board.
Determine the type of signal required by the host system.
There are two types of signals used in 4-20mA
communications, Internal source or external sink. Each
communication channel has four sets of jumpers that must be
shunted to the proper setting. (Please note that the factory
settings are generally for internal source).
The 4-20mA output signals from the board are located on the
terminal boards marked TB1 and TB2. Each channel has a +
and - indication corresponding to the markings on the board.
The 4-20mA Signal Board has five communication channels for
pH, ORP, TDS, temperature and PPM readouts. Each analog
signal requires two wires for connection to the central
monitoring system.
The 4-20mA Control Board also has five pump control
channels for acid, sanitizer, oxidizer, de-oxidizer and base
feed. Each analog control signal requires two wires for
connection to the corresponding pump.
Figure 10 - 4-20 mA Converter Boards
Page 20
INSTALLATION Page 18
PLUMBING
Plumbing includes installation of the sensors and connection of
the chemical feeders or control valves.
Installation of Sensors
The CDCN controller uses up to eight sensors for
measurement of water chemistry, temperature, flow rate,
pressure and water level:
- conductivity sensor for Total Dissolved Solids,
- potentiometric sensors for pH and ORP,
- thermistor for temperature,
- Hall effect pulse generator for flow rate,
- piezoelectric sensors for influent and effluent pressures,
- electro-optical water level sensor.
On small recirculation lines (2-inch pipe), the water chemistry
sensors (conductivity, pH, ORP and temperature) can be
installed directly on the main line using PVC reducing tees
(Figure 11).
On larger lines, the sensors should be mounted on a bypass
line, using either a Bypass Line Assembly (Figure 12) or a
Sensor Cell Cabinet (Figure 13).
Figure 11 - Sensor Tee
In-line Installation (2" Pipe)
Use only 2x2x3/4 in. SST reducing tees without reducers. Do
not install the sensors near an elbow or a constriction where
there might be excessive turbulence.
Install the tees on the suction side of the pump and make sure
that the tip of the sensor is oriented downward - as shown in
Figure 11 - to avoid formation of air pockets near the tip. The
sensors should be readily accessible for servicing but not
exposed to physical damage.
After inserting the sensor, be careful not to overtighten the
compression fitting as it can crush the small glass tube inside
the sensor. Make it finger tight (no wrench).
Bypass Line Installation
The CDCN Bypass Line Assembly (P/N BPL-0.5) shown in
Figure is recommended for installation of the sensors. It is
designed to assure a smooth and reliable flow of water. It
includes:
- PVC tees (3/4" SST),
- Fast & Tite fittings (3/4" MPT),
- In-line Y-filter (3/4" MPT),
- In-line visual flowmeter (3/4" FPT),
- On/off flow switch (3/4" FPT),
- Two (2) ball valves (3/4" SxS) for flow adjustment and for
isolating the bypass line during backwashing of the filter and
other maintenance operations,
- Ball valve for water sampling and testing.
The Bypass Line Assembly should be installed exactly as
shown on Figure . In particular, make sure to install the
flowmeter in a vertical position and to install the flow switch
downstream of (after) the sensors to assure a smooth flow of
water near the sensors.
Figure 12- Bypass Line Assembly
Page 21
INSTALLATION Page 19
Sensor Cell Cabinet
For ease of installation and maintenance, the components of
the bypass line assembly can also be supplied in a preplumbed Sensor Cell Assembly, also named Wet Box. As
shown in Figure 13, the Wet Box is mounted in a separate
fiberglass cabinet containing the sensor cell. It should be
mounted on a ½" bypass line with Y-filter, flowmeter and
paddlewheel safety flow switch.
Make sure that the Sensor Cell Assembly is located within 10'
(3 m) of the controller cabinet or order sensor extension cables
(see Sensor Cables).
See the wiring instructions in the ELECTRICAL section and the
operational instructions under WATER FLOW below.
Water Flow
Proper flow of water past the sensors is essential to obtaining
good readings. To check the water flow in the bypass line,
start the main recirculation pump. Open both the intake and
the return valves on the bypass line and read the flow rate on
the flowmeter. It should be in the middle of the range, i.e. 4 TO
6 gpm (or 16 to 20 l/min). If the water flow is too high, reduce it
by closing down the valve on the RETURN SIDE of the bypass
line. If there is no water flow, replumb the bypass line as
shown on the schematic.
NOTE: The most common installation problems with bypass
line or wet box installations are caused by faulty hydraulics.
Figure 13 - Sensor Cell Assembly
To ensure proper water flow, make sure that the intake side of
the bypass line is connected to the pressure side of the
recirculation system and that the return side is connected to a
low pressure area - such as the vacuum side before the
recirculation pump, or low pressure downstream
On/Off Flow Switch
An on/off-type flow switch is recommended with the CDCN to
prevent accidental feeding when there is no water flow.
The flow switch should be connected to the contacts on the
upper right corner of the Mother Board as follows:
CDCN13
TB1 - Level control sensor and on/off flow switch
5= LOW
4=GND
3= Flow Flow switch wire
2= GND Flow switch wire
1= +5 VDC
CDCN12
TB3 - Flow pulser and on/off flow switch
4=
3= GND Flow switch wire
2= Flow Flow switch wire
1= +5 VDC
NOTE 1: The switch must be installed so that the
small arrow on the body of the switch is in
the direction of water flow inside the bypass
line.
NOTE 2: The flow switch sends a signal to the
microprocessor. DO NOT APPLY POWER
TO IT.
NOTE 3: The flow switch should normally be wired
through a conduit line or a junction box. If
not, it is recommended to seal the top of the
flow switch with silicone grease or
waterproof tape to prevent condensation of
water and possible malfunction of the switch.
Page 22
INSTALLATION Page 20
WATER CHEMISTRY SENSORS
Sensor Design
The pH and ORP sensors are non-corroding sealed
combination electrodes (Figure 14). They do not require
refilling. Each sensor has an external plastic body and an
inner glass tube which can be broken if stressed too severely.
The potentiometric sensors produce small voltages - in the
millivolts range. Since they have a high impedance (20 to 50
megohms), the electrical current produced by the sensors is
extremely small - in the picoamp (10-9A) range. The output is
so small that it cannot be measured with ordinary voltmeters
and must be internally amplified by the controller.
There is no electrical current flowing from the controller to the
sensors and the sensors are optically isolated from the high
voltage circuit inside the electronic module. Therefore they
create no electrical danger.
pH Sensor
The pH Sensor senses the acidity of the water and works with
any acid or base. It is recognized by its blue color and the
glass bulb at the tip.
ORP Sensor
The ORP (Oxidation-Reduction Potential or Redox) Sensor
monitors the activity of the sanitizer (Fast Acting Free Chlorine,
Bromine or Ozone) through its oxidizing power. It is
recognized by its red color, the wide platinum band at the tip of
the electrode and the white plastic tag on the cable.
Sensor Installation
The pH and ORP sensors are shipped in individual cartons for
extra protection. When ready for installation, remove the
plastic cap on the tip of the sensor. If it is difficult to remove,
dip it in water for a few seconds. It should then slide off easily.
There may be a white crystalline deposit around the cap. This
is produced by the salt solution used for shipping and does not
affect the performance of the sensor.
For installation of a sensor, the 3/4" bottom part of the Fast &
Tite fitting should first be screwed in the PVC Tee (Figure 11).
Teflon tape can be used but it should not be overtightened.
The sensor with the upper part of the fitting should then be
carefully inserted, as shown on the schematic above, being
careful not to bend or overtighten it, to avoid breaking the small
glass tube inside. The sensor tip should be about ½" (1 cm)
inside the PVC tee. It does not matter which sensor, ORP or
pH, is upstream or downstream.
Sensor Cables
Each potentiometric sensor is supplied with a standard 10' (3
m)-long cable made of coaxial wire designed to minimize
electrical interference. For ease of identification, all ORP
cables have a white marker.
Figure 14 - ORP and pH Sensors
The cables are terminated with bayonet-type, spring-loaded,
push-and-twist male BNC connectors. These are connected to
the proper female BNC connectors located on the left side of
the controller cabinet.
If the cable is longer than needed, it should be coiled neatly
and attached under the cabinet. DO NOT CUT THE SENSOR
CABLE under any circumstance.
If a longer cable is needed, custom-made extension cables
with BNC connectors can be ordered from the factory in
lengths of up to 100 feet. For longer distances, a pre-amplifier
may be required. Consult your dealer or the factory for details.
Electrical Interference
Electrical interference from high voltage equipment, such as
power transformers, pumps or high voltage lines, may
sometimes produce erratic readings from the sensors. It may
then be necessary to insulate the sensor cables by mounting
them inside a metallic conduit line that is properly grounded.
Small signals may also be picked up from current leakage
through the water line, due to faulty wiring or improper
grounding of pool equipment, such as the pump or heater.
Electrolytic chlorine generators are also a frequent source of
current leakage.
To check for current leakage, compare the readings of the
sensors when they are in line and when they are dipped in a
plastic bucket containing the same water from the pool or spa.
If you get different readings, there is current leakage. Its
source must be identified and eliminated with proper grounding
by a qualified electrician.
Page 23
INSTALLATION Page 21
Storage and Winterizing
CAUTION: STORING OR SHIPPING A SENSOR
WITHOUT CAP OR WATER WILL VOID ITS
WARRANTY.
All sensors are shipped with a plastic cap on the tip to protect
the tip from physical damage. This cap also contains water to
prevent the sensor from drying out.
Remember to store the protective caps inside the sensor box
or inside controller cabinet so that they are available for
storage, winterizing or shipping. When storing or returning any
sensor for warranty consideration, always add water inside the
cap to prevent the sensor from drying out.
The sensors can be damaged by freezing. They should be
removed from the line and stored at room temperature
whenever freezing is expected.
Sensor Warranty
The sensors are covered by a standard one-year manufacturer
warranty. This does not include damage caused by physical
abuse such as breakage of the inner glass tubing or by drying
out of the tip. BE CAREFUL IN HANDLING THE SENSORS
and ALWAYS REPLACE THE CAP WITH WATER INSIDE
when not in use.
In case of sensor failure, return it as soon as possible with its
cap on and with water inside the cap for warranty consideration
or replacement.
TEMPERATURE SENSOR
The Temperature Sensor is a thermistor that is mounted inside
a ¼" MPT fitting.
ELECTRONIC FLOW SENSOR
Either Hall effect type sensors or Reed switch (Contacting
Head) type sensors can be used.
WARNING: Follow all manufacturer’s instructions
carefully and do not install in line under
pressure.
Hall effect sensor
For fill water, connect the three leads from the sensor to the
Terminal Barrier strip TB 4 as indicated on the Mother Board
Schematic (Figure 5, Page 13).
For bleed water, connect two leads from the sensor to the
Terminal Barrier strip TB3 and the Red lead to the +24vdc
Terminal Barrier strip TB4 as indicated on the Mother Board
Schematic and the sensor connection paragraph page (Figure
5, Page 13).
Reed switch sensor
For fill water, connect the two leads from the sensor to the
Terminal Barrier strip TB 4 as indicated on the Mother Board
Schematic (Figure 5, page 13).
For bleed water, connect the two leads from the sensor to the
Terminal Barrier strip TB3 (Figure 5, page 13)
CAUTION: A 24VDC signal is used for signal generation with
Hall effect sensors. Connecting the wrong wires may cause
damage to the sensor and to the microprocessor.
Enter the calibration K-factor in pulses per unit of volume flow
(gpm or l/m) for the specific pipe diameter and thickness, as
listed in Chapter II, Submenu 5.2, page 38.
If the CONDUCTIVITY (TDS) option is ordered, the
temperature sensor is mounted inside the conductivity sensor
to facilitate installation.
Install the sensor in an elbow before the ORP and pH sensor,
either on-line or on the bypass line, using a ½-inch FPT PVC
tee. Connect the leads to the Terminal Barrier strip TB5 as
indicated on the Mother Board Schematic (Figure 5, Page 13)
CONDUCTIVITY SENSOR
The Conductivity Sensor is mounted on a 3/4" MPT fitting that
also contains the temperature sensor. It can be installed next
to the ORP and pH sensor, either on-line or on the bypass line,
using a 3/4" FPT PVC tee. Make sure that the head of the
sensor is properly oriented with the flow of water to give a good
solution sample (See Figure 12).
The two leads from the sensors should be connected as
indicated on the Mother Board. If the temperature sensor is
incorporated inside the conductivity sensor, there are two extra
leads that should also be connected as indicated on the
Mother Board (Figure 5, Page 13)
PRESSURE TRANSDUCERS
The pressure sensors are Series 2000 transducers with a 1/418 NPT thread connection rated at 60 psi (4 bar). They should
be installed on the intake (influent) and return (effluent) sides
of the filter or bank of filters.
Connect the leads from the sensors to the Terminal Barrier
strip TB2 as indicated on the Mother Board Schematic (Figure
5, page 13).
WATER LEVEL SENSOR
The water level sensor is an ELS-1100 Series electro-optical
sensor with a 1/4" NPT thread. Locate it in a convenient
location to open a fill valve as required to maintain constant
water level.
The optical prism surface should always be kept clean and
should be at least 2" (5cm) away from reflective surfaces.
Connect the leads from the sensor to the Terminal Barrier strip
TB1 as indicated on the Mother Board Schematic (Figure 5,
page 13).
Page 24
CHEMICAL FEEDERS
INSTALLATION Page 22
Operation
Locate the 5-amp power outlets (110 or 230 V) on the Power
Board (Figure 4 or Figure 6). They are marked ACID FEED,
BASE FEED, OXIDIZER FEED, DE-OXIDIZER FEED.
Connect as required to the chemical feeders for control of pH
and ORP. Connect the power outlets marked ADDITIVE1, 2, 3
and 4 to a chemical feeder for each additive, as required. For
best results, use the following guidelines:
1. Always inject the chemicals downstream of the sensors.
2. Proper operation of the overall "water / feeders /
controller" system requires that the chemical feeders be
properly sized and in good operating condition. Each
feeder must be adjusted so that the chemicals are not fed
excessively fast or slow. For best control, the feed control
mode should be on Proportional control or the feed rate
should be as low possible, just high enough to meet the
expected chemical demand.
3. If the controller shows an out-of-range condition, this is
usually caused by a malfunction of the chemical feed
system. Make sure to investigate the cause and correct
the malfunction before returning to automatic control.
4. An OZONATOR can be used together with chlorine or
bromine feed but the presence of ozone in the water may
affect the calibration of the sensor.
Chemical Feed Pumps
Chemical feed pumps are used to feed liquid oxidizer, such as
sodium hypochlorite OClNa, also known as liquid chlorine, or
solutions of calcium hypochlorite or dichlor powder. Liquid
chemicals for pH control include muriatic acid, caustic soda or
solutions of soda ash.
Any standard chemical feed pumps (diaphragm, or peristaltic)
can be used, as long as they are properly sized for the
installation, and meet local approval requirements.
Install the pumps as shown in the main installation schematic,
following the electrical code and the pump manufacturer's
instructions.
Erosion Feeder
Figure 15 - Erosion Feeder Installation
Figure 15 shows the installation of an erosion feeder for
bromine or chlorine tablets with a bypass line. The differential
pressure must be at least 15 psi (1 kPa).
For automatic control, a solenoid valve is installed on the
intake side of the bypass line, as shown on the schematic, to
turn the flow of water through the feeder on and off as needed.
With bromine dihalo tablets, the solenoid valve can be
mounted just before the brominator.
Because trichlor tablets are very corrosive, it is recommended
to protect the solenoid valve with both a check valve and an air
break to reduce back-diffusion of the chemicals. It is also
recommended to switch to a less aggressive sanitizer.
Caution: When handling potentially dangerous
chemicals always follow the manufacturer’s handling
precautions and guidelines. Use only as directed.
Carbonic Acid Valve
A special solenoid valve for carbonic acid can be used to
control the addition of CO2, an acid used to lower pH. It also
increases Total Alkalinity making pH control difficult. Add
muriatic acid, HCl, to reduce high alkalinity.
Page 25
INSTALLATION Page 23
>COND
2000
uS
A
LSI OK
>COND
2000
uS
A
06/01/04
19:06
LSI OK
CONFIGURATION
Communication
s
CHAPTER III - CONTROLLER OPERATION
This Chapter describes the operation of the CDCN controller.
For reference, the menus and submenus are shown in Chapter
I - INTRODUCTION / Menu Tree.
Access
Each menu is accessed by highlighting a line on the Main
Display screen with the UP and DOWN arrow keys and then
entering the submenu with the RIGHT arrow key. To return to
any previous menu, press the LEFT arrow key.
Each menu is identified by a combination of numbers, from 1 to
8, corresponding to the lines that are used to access it. For
instance, Submenu 8.1.4 for Clock Setup is accessed through
line 8 on the Main Display Screen (Configuration Menu), then
line 1 (Initial Setup) and line 4 (Clock).
To facilitate startup of the controller, Menu 8 for Configuration
and Setup is discussed first in this manual. All the other
menus from 1 to 7 are discussed afterwards in numerical
order.
NOTE: The CDCN12 display shows only four lines of text
at a time. It can be scrolled with the UP and DOWN
ARROW keys to show the other lines. The correspondence
between the Main Display lines and the manual
paragraphs is as follows:
- Temperature is line 3 in CDCN12, but paragraph 4
- Additives are line 4 in CDCN12, but paragraph 7
- Configuration is line 5 in CDCN12, but paragraph 8.
CDCN13 Main Display
pH 8.5 pH A
ORP 750 mV X
TEMP 72 F X
FLOW 15/10 gpm A
>FILTER N.A.
ADDITIVES TSSX
06/01/04 19:06
CDCN12 Main Display (Scroll to last line)
pH 8.5 pH A
TEMP 72 F X
ADDITIVES TSSX
Menu 8 - Configuration
Default Setup
The CDCN controller is pre-loaded with standard defaults
values for normal operating conditions. On startup, it uses the
default values, i.e. English language, U.S. units, no password,
standard setpoints and alarms, etc.
The operator can change the settings at any time. He can
revert to the original default values (partial or complete)
through the Reset Submenu 8.2.5.
All settings are maintained in case of a power shutdown as
long as the battery maintains a charge above 2.5 V. The
original default values are automatically reloaded in case of
complete loss of power (both line and battery power).
8 - CONFIGURATION MAIN MENU
Access
To access the Configuration Menu, use the DOWN arrow key
on the Main Display screen to highlight the last line and then
press the RIGHT ARROW key to show the next menu. It
includes the three submenus shown on the right (Menu 8).
Initial Setup
Operations
Page 26
OPERATION Page 24
UNITS
INITIAL SETUP
SET CODE NO
LANGUAGE
8.1 - INITIAL SETUP SUBMENU
The Initial Setup Submenu is used to specify the basic
operating conditions of the CDCN. It is accessed through the
Configuration Menu on the last line of the Display Screen.
8.1.1 - Language
The Language Submenu allows the user to select either one of
three languages: English, French or Spanish for all displays
screens. The standard (default) language is English.
Language changes take effect immediately.
8.1.2 - Units
The Units Submenu allows the choice system of U.S. or Metric
units to be used throughout the program. The standard
(default) value is the U.S. system. The change of units takes
place immediately.
Submenu 8.1
Language
Units
Code No.
Clock
Readings
Data Logging
Model Options
Submenu 8.1.1
The unit equivalencies are as follows:
U.S. METRIC
Conductivity uS uS
TDS ppm mg/l
pH pH pH
ORP mV mV
Temperature F C
Water Flow Rates gpm l/m
Water Flow ga l
Pressure psi kPa
8.1.3 - Code Number
The Code Number Submenu is used to define different
operator access levels. Code numbers may be required for
access at key points in the program and for remote
communications.
Up to ten five-digit Code Numbers (no letters) may be entered,
along with an associated access level from one to three. To
make it easier to remember a code number, the operator may
select a combination of numbers corresponding to a familiar
name on a standard telephone keypad.
The following access levels are available:
Level 1: View only,
Level 2: Calibration,
Level 3: All functions.
English
Français
Espanol
Submenu 8.1.2
U.S.
Metric
Submenu 8.1.3
Code No. #####
Access 2
To clear an existing code number, its access level is set to
zero.
Once a code number has been acknowledged, it remains valid
for an hour of continuous operation so that the operator does
not have to re-enter it constantly. If necessary, it can be
changed by returning to the Welcome screen.
Page 27
OPERATION Page 25
MODEL OPTIONS
DAT
E/TIME
DISPLAY HOLD
DATA LOGGING
8.1.4 - Clock
In case of a power shutdown, the clock is maintained by the
backup battery. It needs to be reset only in case of complete
power shutoff with loss of battery power or whenever the
program chips are replaced or upgraded.
NOTE: The date uses a MONTH/DAY/YEAR calendar.
NOTE: The time display uses a 24:00 hour clock.
8.1.5 - Readings
The DISPLAY HOLD parameter is used to stabilize sensor
readings and minimize fluctuations. It specifies the time
interval for data averaging and updating. The standard
(default) value is 10 seconds. It can be changed to any value
between one and sixty seconds.
8.1.6 - Data Logging
The DATA LOGGING screen shows the interval for storing the
test data in the controller memory. Interval values range from
one to 999 minutes, with a default of 60 minutes.
The memory chip can store up to 999 test results. When it is
full, it writes over the oldest entries. Therefore the greater the
interval is, the longer it takes to fill up the memory.
For instance, an interval of 60 minutes (one hour) fills the
memory in 41 days. Data logging every four hours fills the
memory in about 5 ½ months.
Submenu 8.1.4
Date 08/10/96
Time 17:00
Day of week Mo
Submenu 8.1.5
Time base for
Averaging display values
10 seconds
Submenu 8.1.6
Time Base:
60 minutes
Reset
Submenu 8.1.7
To avoid losing test data, remember to print it or download it to
a computer before the memory is full (see Submenu 8.2.4 Print Reports).
8.1.7 - Model Options
The Model Options Submenu is used to specify the functions
that are actually installed on the controller. Non-installed
functions should be set to “NO”. This way, the Display Screen
shows N.A. instead of erroneous readings. For demonstration
purposes, it is possible to access any function and review its
features - even if it is not actually installed on the controller - by
selecting “YES” for that option.
The ADDITIVE option submenu allows the selection of additive
names from a pre-defined list. The RIGHT arrow key allows to
browse through the list. The LEFT arrow key returns to the
previous submenu.
For the CDCN12, when one of the options Conductivity,
Temperature or Additives is set to “NO”, its line is removed
from the main screen. When the pH option is set to “NO”, its
line remains to allow pH monitoring and the relay is reallocated for a third additive.
CONDUCTIVITY
pH Yes
ORP No
TEMPERATURE Yes
FLOW Yes
FILTER No
ADDITIVES Yes
Page 28
OPERATION Page 26
OPERATIONS
SATURATION
Condition
OK
LANGELIER LIMITS
8.2 - OPERATIONS SUBMENU
The Operations Submenu gives access to the operator to
change the operating conditions during normal operation.
8.2.1 - Audio Alarms
This option is used to disconnect the audio alarm (buzzer) in
case of out-of-range or other alarm conditions. All visual
alarms, such as flashing on the screen, still remain operative.
8.2.2 - Bypass Line
The bypass line is a recommended feature for sensor
installation on large recirculation lines, i.e. over 2 inches in
diameter. It is optional for the CDCN12 and CDCN13.
A Safety Flow Switch is used to prevent operation when there
is insufficient water flow in the bypass line. This may happen
particularly when the bypass line is shut down for
maintenance.
The standard flow switch provided with the CDCN is an on/offtype flow switch with a shutoff set at about 1.0 gpm (3.8 l/m).
The Bypass Line Protection option should always be set to
YES, indicating that the alarm is active and will cause the
interruption of all feed and bleed events.
Submenu 8.2
Audio Alarms YES
Bypass Line YES
Saturation Index OK
Print Reports
Reset
Battery
Probe Monitor YES
Submenu 8.2.3
Alkalinity (ppm) 150
pH 7.5
Temperature 80
Limits
Langelier Index 0.23
If the flow switch is defective or temporarily disabled, the
bypass alarm can be overridden by setting the Bypass option
to NO. This override should be used with extreme caution:
Feeding chemicals when water is not running in
the bypass line may cause dangerous water
conditions and hazardous chemical reactions.
8.2.3 - Langelier Saturation Index
The Langelier Saturation Index is used for monitoring the
development of corrosive or scaling tendencies in water. It is
calculated from the formula:
SI = pH + TF + AF + CF - 12.1
where:
pH = pH sensor reading or keyboard input,
TF = Temperature factor calculated from sensor input or
keyboard input,
AF = Alkalinity factor from data table,
CF = Calcium Hardness factor from data table.
The CDCN calculates the Saturation Index automatically using
sensor input for pH and Temperature and operator data input
for Alkalinity and Calcium Hardness. This eliminates the need
for complex conversion tables.
Submenu 8.2.3.5
Scaling above + 0.3
Corrosive below - 0.0
8.2.3.1 - Langelier Limits
The standard Langelier limits show "OK" if the index is
between 0 and 0.3, "CORR" if below 0, and "SCALE" if above
0.3. If an alarm condition develops, the Display Screen alerts it
with flashing characters.
Because other values may be more applicable to the
installation, the Langelier limits can be changed by entering
preferred values in Submenu 8.2.3. 5. Use the RIGHT arrow
key to change the + or - sign and press OK. Then, enter the
desired value and press OK.
Page 29
OPERATION Page 27
8.2.4 - Print Reports
The Print Reports Submenu is used to download the test data
from the internal memory chip of the CDCN (see Submenu
8.1.6 - Data Logging). The data is saved in memory in
standard ASCII text format as shown on the right.
The data can be printed or downloaded using three different
methods:
- on-site printing to a serial printer,
- on-site downloading to a computer,
- remotely by modem connection or by direct connection to
a computer with the CDCN program.
After downloading into a computer, the data file can be
processed with a standard text editor or word processor. The
CDCN program can also be used to display the data
graphically (see Chapter III - TELECOMMUNICATIONS).
A maximum number of 999 sets of test data can be stored in
the controller memory chip. It is therefore recommended to
download the data at periodic intervals to save it.
Downloading the data does not erase it from the memory chip.
To erase all data in memory, use Submenu 8.1.6 - Data
Logging and select Reset.
For printing, use the desired setup below, then enter Submenu
8.2.4 - Print Reports, select the proper dates, move to Print
Data Log and press the RIGHT ARROW. A counter shows the
number of tests being printed.
On-Site Direct Connection
For a direct connection to a CDCN controller under Windows®
98/Me/2000/XP, it is required to configure a HyperTerminal on
the computer, preferably called CDCNTrol.
To launch HyperTerminal, click on Start, Programs,
Accessories, Communications, and finally HyperTerminal (if
the HyperTerminal shortcut does not appear, go to Add or
Remove Programs in Control Panel and Add/Remove
Windows Components).
In the “Connection” window, enter a name for the new
connection, such as “CDCNTrol”.
In the “Connect To” window, click on the “Connect Using” box
and select an available COM port in your machine, such as
“COM1”.
In the “Port Settings” window, enter the following parameters:
- Bits per second 2400
- Data bits 8
- Parity None
- Stop bits 1
- Flow control Hardware
Click OK, File, Save.
To create an icon of the saved connection on your Desktop:
- Click on Start, Programs, Accessories, Communications,
HyperTerminal,
- Right click on “CDCNTrol” and drag the mouse to your
Desktop,
- Release and click “Copy here”.
To start a direct connection to a CDCN controller:
- Connect the available serial port on your PC computer
“COM1” to the RS-232 serial male connector on the
controller, using a null-modem cable available from your
local electronics store.
- Click on your “CDCNTrol” icon on your Desktop to open a
new connection,
- From the “Transfer” drop-down menu click “Capture Text”.
Page 30
OPERATION Page 28
RESET
BATTERY: 3.0 V
Remote Download
Logged data can be more easily downloaded using the
CDCNTrol software program for Windows® by remote
computer with a modem or by direct connection through the
controller RS485 communication port, as explained in Chapter
III - TELECOMMUNICATIONS.
Click on the CDCNTrol icon in Windows® and use Menu 6 REMOTE CONTROL to establish communication. When the
image of the controller screen appears on the remote
computer, go to Submenu 8.2.4 and select Print Data Log with
the RIGHT ARROW key.
The computer screen displays: “Please wait ...” and a
numerical counter showing the tests being downloaded. If a
printer is connected to the computer, the data is printed at the
same time.
The downloaded data is normally saved in a default text file
named LOG.TXT in the Facilities Setup menu in the CDCNTrol
program. Another name can be specified through the Edit
Facility submenu. If the file already exists, the new data is
added to the old data.
Data Display
Submenu 8.2.5
Complete Reset
Partial reset
Submenu 8.2.6
Minimum voltage
required: 2.5 V
8.2.6 - Backup Battery
To view the data in text form, as shown on the previous page,
use Menu 8 - DISPLAY DATA/VIEW in the CDCNTrol program
or use any standard text or word processor.
Graphic Display
To display the data in graphic form, use Menu 8 - DISPLAY
DATA/GRAPH in the CDCNTrol program (see Chapter III TELECOMMUNICATIONS for details).
8.2.5 - Reset
The Reset Submenu is used to take the calibration parameters
back to the initial factory settings. This may be done on initial
installation or whenever the operating parameters have been
misadjusted by the operator.
Complete Reset resets all system parameters to their initial
"default" settings. Partial Reset allows partial resetting of
individual functions, such as Conductivity, pH, ORP, etc.
The CDCN12-13 uses a 3V lithium battery to maintain
calibration, setup and test data in memory storage in case of
power shutdown. The battery is designed to last for more than
200 days without any power being supplied to the unit. The
minimum voltage required is about 2.5 V. The Battery
Submenu displays the voltage of the battery for information. A
flashing display on the Main Display screen indicates a low
battery voltage.
To prevent loss of memory data, the battery should be
replaced when the voltage gets below 2.5 V. If power to the
memory is completely discontinued, all settings revert
automatically to the initial default values. They have to be
individually reset to their proper values by the operator.
When changing the battery, it is important to keep power
supplied to the unit to keep the proper settings in memory.
Replacement CR2032 batteries can be purchased locally.
8.2.7 - Probe Monitor
Probe Monitor is a unique CDCN feature (Patent Pending) that
allows dynamic monitoring of the pH and ORP sensors to alert
a probe failure as soon as it happens. Other controllers have
to enter an alarm condition in order to alert the operator. This
could result in potential damage and liability.
To activate or disactivate the Probe Monitor function, use the
Right Arrow to select YES or NO in Submenu 8.2, line 7.
To activate or disactivate the Probe Monitor function, use the
Right Arrow to select YES or NO in Submenu 8.2, line 7.
Page 31
8.3 - COMMUNICATIONS SUBMENU
OMMUNICATIONS
4-20 mA Output
HONE NUMBERS
: ______________
RP CONDUCTIVITY
4
-
20 mA LIMITS
OPERATION Page 29
The details of the communications features are discussed in
Chapter III - TELECOMMUNICATIONS.
The Communications Submenu is used to select the phone
numbers to report alarm conditions and to enter the
identification number for voice telephone reporting.
8.3.1 - Phone Numbers
Up to six (6) different phone numbers can be entered for
automatic calling in case of an alarm condition. Each number
is called sequentially until one of the numbers is answered and
the proper password is entered.
To delete a phone number, replace it with 0 (zero).
8.3.2 - Unit Identification
The unit identification number is used to identify individual
facilities for voice telephone reports, either a status report or an
alarm report. The default value is 1.
8.3.3 - Alarm Calling
Specify YES if you want the controller to dial automatically the
phone numbers listed above in 8.3.1.
8.3.4 - 4-20 mA
Submenu 8.3
C
Phone Numbers
Unit I.D.
Alarm Calling YES
Submenu 8.3.1
P
1: ______________
2: ______________
3: ______________
4: ______________
5: ______________
6
Submenu 8.3.4
The 4-20 mA output is an option (OPTION 4-20) that includes
one or two converter boards to convert sensor readings and/or
control outputs into analog signals that can be fed into analog
monitoring equipment (BMS) or control equipment (pumps or
valves with analog control circuitry).
The converter boards plug into separate areas of the mother
board of the controller (see Chapter II - INSTALLATION).
To convert sensor readings to BMS, the 4-20 mA SIGNAL
Submenu is used to set the lower and upper limits for data
conversion for each of the functions shown on the screen
(Submenus 8.3.4 and 8.3.4.1). The standard (default) values
for the 4-20 mA limits are the values that have been selected
for the out-of-range limits. This means that the lower out-ofrange limit corresponds to the minimum signal of 4 mA and the
higher limit to 20 mA.
To change the limit values of one of the functions, highlight the
desired function in Submenu 8.3.3 with the UP or DOWN
ARROW key and press the RIGHT ARROW key to access
the 4-20 mA LIMITS screen, as shown on the Submenu 8.3.4.1
for ORP.
To convert control outputs to control equipment (valves,
pumps), use the 4-20 mA CONTROL Submenu 8 (X.1.3.3) .
O
pH
ORP
TEMPERATURE
MAKE UP FLOW
Submenu 8.3.4.1
COND TOP 5000
COND BOTTOM 100
Page 32
OPERATION Page 30
CONDUCTIVITY
AUTO
TDS
AUTO
Use Automatic
YES
1 - CONDUCTIVITY MAIN MENU
Conductivity and TDS
The Conductivity sensor is used to monitor and control the
concentration of Total Dissolved Solids (TDS) in the water. It
reads the conductivity of the water in microsiemens per
centimeter (S/cm). The conductivity readings can be
converted into ppm or mg/l of TDS by using a conversion factor
that depends on the type of ionic species that are present in
the water. Normally, a conversion factor of 0.5 is used for
water solutions containing different species of carbonate and
chloride ions (see 1.8 - Select Scale).
Control of Conductivity or TDS is obtained by replacing the
water with fresh water when the concentration level gets too
high. This is done by opening a valve to dump the water.
Replacement with fresh water is done automatically by opening
the valve through the water level control option.
Both flows of water - in and out - can be monitored with the
flowmeter option.
Conductivity or TDS Display
Depending on the application, it may be customary to control
either conductivity or TDS. The display is therefore available in
the two systems, as shown on the sample screens.
Changing the displays from conductivity to TDS is done by
changing the TDS factor from 1 to any other value different
from 1. To do this, select the SELECT SCALE Submenu (see
1.8 and 1.8.2) and change the TDS factor value. If the TDS
Factor is 1, the display shows Conductivity inS/cm. If it is
different from 1, it shows TDS in ppm or mg/l.
Menu 1
Calibrate uS 1500
Setpoint uS 2500
Alarm Low uS 100
Alarm High uS 5000
Time Limit min 30
Run Time 15 60
Select Scale
Menu 1 (Alternate)
Calibrate ppm 750
Setpoint ppm 1250
Alarm Low ppm 50
Alarm High ppm 2500
Time Limit min 30
Run Time 15 60
Select Scale
Submenu 1.2.1
1.1- Control Mode
Line 1 shows the Control mode that is currently selected: OFF
(X), Manual (M), AUTO (A), Cycle Timer (T), Percent of Flow
(F), or Daily Schedule (S).
To change the Control Mode, select the first line with the UP or
DOWN ARROW keys and press the RIGHT ARROW key. The
Control Mode screen is then displayed.
The Control Mode screen and selection procedures are
common to all control functions. See CONTROL Submenu in
this Chapter.
1.2 - Display and Calibration
The second line displays the current reading of conductivity in
S/cm or TDS in ppm or mg/l.
The conductivity or TDS readings should be calibrated with
standard test solutions and with temperature compensation
activated on the controller.
As with all sensor calibrations, the conductivity sensor can be
calibrated with 1, 2 or 3-Point calibration for origin, slope and
curvature. This is done by pressing the RIGHT ARROW key to
enter the CALIBRATION Submenu. The calibration procedure
is common to all control functions. See CALIBRATION
Submenu further down in Chapter II.
Temperature Compensation
for Conductivity?
NO
1.2.1 Temperature Compensation
After calibration, the Compensation Submenu 1.2.1 is
displayed. This feature requires the use of the temperature
sensor. The correction is expressed as a change of slope per
degree Celsius at 25oC. The default is 2%, but it can be
adjusted if necessary.
1.3 - Setpoint
The SETPOINT determines the conductivity or TDS level that
will trigger the dumping (bleeding) of water when the controller
when placed in the AUTO control mode.
To change the setpoint, press the RIGHT ARROW key and
enter the numerical value with the digital keypad.
Page 33
OPERATION Page 31
SELECT SCALE
ALARM OPTIONS
TOTAL
TIME ALARM
Enter 0 for no alarm
1.4 - Low Alarm
The ALARM LOW value is set to generate an alarm when the
sensor reading falls below the set value. After the alarm value
is set, the ALARM OPTIONS submenu 1.4.1 is shown, asking
whether a low alarm condition should stop the dump valve and
activate the alarm buzzer.
1.5 - High Alarm
The ALARM HIGH value is set to generate an alarm when the
sensor reading rises above the set value. After the alarm value
is set, the ALARM OPTIONS submenu 1.5.1 is shown, asking
whether a high alarm condition should stop the bleed valve and
activate the alarm buzzer.
1.6 - Time Limit
The TIME LIMIT sets the maximum amount of time in minutes
that is allowed for continuous dumping of water to correct a high
conductivity or TDS reading. This acts as a safety feature to
prevent overdumping of water in case of a malfunction of the
dump valve.
1.7 - Run Time
The RUN TIME displays the amount of running time in minutes
for each current activation event and the cumulative run time
since last reset to zero.
To reset the cumulative run time, enter zero in the last column.
To reset only the current run time, turn the control mode off and
back on.
Submenus 1.4.1 and 1.5.1
Bleed lockout YES
Alarm Buzzer YES
Submenu 1.7.1
Alarm if total
Bleed time exceeds
110 min.
Submenu 1.8
Cell Constant 1.00
TDS Factor 0.50
After the cumulative run time is reset, the TOTAL TIME ALARM
submenu (see submenu 1.7.1) is displayed to set the Total
Time Alarm option. This alarm is activated when the cumulative
run time reaches the alarm value. It does not lock the bleed
control outlet.
1.8. - Select Scale
The Select Scale prompt takes the operator to the SELECT
SCALE Submenu 1.8.
1.8.1 - Cell Constant
Conductivity is usually monitored with contacting-type sensors,
which are made of two electrodes that are specifically sized and
spaced to provide a known cell constant or factor.
The Cell Constant corresponds to the aspect ratio (in cm
the geometrical cell formed by the two electrodes (length
divided by cross sectional area). It is set on the CDCN
controller, as specified by the probe manufacturer.
To check the cell constant, measure the conductivity of a water
sample with a portable meter. Divide by the conductivity
reading on the CDCN controller. Make sure both instruments
are consistent in using or not compensation.
-1)
1.8.2 - TDS Factor
The TDS Factor is the conversion factor used to convert from
conductivity readings (inS/cm) to Total Dissolved Solids
concentrations (in ppm or mg/l). Entering a TDS Factor
of
different from 1 automatically changes all readings and displays
from conductivity to TDS.
Because the conductivity of ionic species varies with the type of
electronic charges, the relationship with TDS is to a large
extend empirical.
For most water treatment applications, the TDS factor is about
0.5. For instance, a Sodium Chloride solution with a
conductivity of 2,764 S/cm contains 1,410 ppm (mg/l) of NaCl.
This indicates a TDS factor of 1,410 divided by 2,764, i.e. 0.51.
Page 34
OPERATION Page 32
pH
AUTO
Use Automatic
YES
SETPOINT
2 - pH MAIN MENU
Operation
The pH function is used to monitor and control the
concentration of acid or base in the water through the pH
electrode.
The pH Menu screen is used to access all the pH submenus for
Control Mode, sensor calibration, setpoint and alarm settings.
It also displays the actual run time for individual feed events and
the cumulative run time since last reset to zero.
2.1- Control Mode
Line 1 shows the Control mode that is currently selected: OFF
(X), Manual (M), AUTO (A), Cycle Timer (T), Percent of Flow
(F), or Daily Schedule (S).
To change the Control Mode, select the first line with the UP or
DOWN ARROW keys and press the RIGHT ARROW key. The
Control Mode screen is then displayed.
The control mode screen and selection procedures are common
to all control functions.
2.2 - Display and Calibration
Menu 2
Calibrate 7.4
Setpoint 7.5
Alarm Low 7.0
Alarm High 8.0
Time Limit min 30
Run Time 15 60
Probe Rinse OFF
Menu 2.2.1
Temperature Compensation
for pH?
NO
Menu 2.31
The second line displays the current reading of the pH sensor in
pH units.
The pH sensor is best calibrated by testing the sample solution
with a Phenol Red test kit. If needed, the CALIBRATION value
may be adjusted to allow for differences or changes in pH
sensor readings.
The pH sensor can be calibrated with 1, 2 or 3-Point calibration
for origin, slope and curvature. This is done by pressing the
RIGHT ARROW key to enter the CALIBRATION Submenu.
The calibration procedure is common to all control functions.
See CALIBRATION Submenu further down in Chapter II.
After calibration, the operator is shown the Submenu 2.2.1
asking whether automatic temperature compensation is to be
used for pH readings. This option requires the use of the
temperature sensor. The correction is normally small near
neutral pH and is used only if large temperature fluctuations
are expected.
2.3 - Setpoint
The pH SETPOINT determines the pH level that will be
maintained automatically by the controller when placed in the
AUTO control mode.
To change the setpoint, press the RIGHT ARROW key and
enter the numerical value with the digital keypad. After pressing
the OK key, the SETPOINT TYPE Submenu 2.3.1 is displayed
asking whether the control is for Acid, Base or both.
Acid Feed
Base Feed
Both
The normal (default) setting is for Acid feed. This means that
the feed outlet is automatically activated when the pH sensor
reading rises above the setpoint. If it is set for base feed, the
outlet is activated when the pH sensor reading is below the
setpoint.
Page 35
OPERATION Page 33
PROBE RINSE
PROBE RINSE
ON
OFF
ALARM OPTIONS
TOTAL TIME ALARM
Enter 0 for no alarm
2.4 - Alarm Low
The ALARM LOW value is set to generate an alarm when the
pH reading falls below the set value. After the alarm value is
set, the ALARM OPTIONS Submenu 1.4.1 is displayed, to set
the feed interlock and alarm buzzer options.
2.5 - Alarm High
The ALARM HIGH value is set to generate an alarm when the
pH reading rises above the set value. After the alarm value is
set, the ALARM OPTIONS screen is shown, asking whether a
high alarm condition should stop the feeder and activate the
alarm buzzer.
2.6 - Time Limit
The TIME LIMIT sets the maximum allowed time (in minutes)
for continuous acid or base feed (see ORP submenus). This
acts as a safety feature to prevent overfeeding in case of
malfunction of the chemical feeder or as an alarm if the feed
tank runs empty.
2.7 - Run Time
The RUN TIME line displays two separate values: the amount
of running time in minutes for each current activation event and
the cumulative run time since last reset to zero. To reset only
the current run time, turn the control mode off and back on. To
reset the cumulative runtime, enter zero in the last column.
After the cumulative run time is reset, the TOTAL TIME
ALARM submenu 3.7.1 is displayed to set the Total Time
Alarm option. It can be used to simulate a low chemical level
alarm by entering the number of minutes needed to empty the
chemical container: i.e. container volume divided by feeder
rate (i.e.110 min = 55 ga / 0.5 gpm).
2.8 - Probe Clean
Submenu 2.4.1 and 2.5.1
Feed lockout YES
Alarm buzzer YES
Submenu 2.7.1
Alarm if total
Bleed time exceeds
110 min.
Submenu 2.8
OFF
Manual
Auto
Submenu 2.8.3
The Probe Clean Menu is used for automatic rinsing of the tips
of the ORP and pH sensors by injection of a cleaning solution
(usually a weak acid solution) through the recirculation line.
It has three modes of operation: Off, Manual and Automatic
(see Submenu 2.8).
In both the Manual and Automatic modes, it allows a recovery
time for the sensors to prevent chemical overfeeding while the
signal is still affected by the cleaning solution (see Submenu
2.8.1). The recommended minimum is 1 minute.
In the Automatic mode, a 7-day weekly program is used to set
up the ON and OFF times for probe cleaning any day or every
day of the week (see Submenu 2.8.3).
MO 19:00 19:05
TU 00:00 00:00
WE 19:00 19:05
TH 00:00 00:00
FR 19:00 19:05
SA 00:00 00:00
SU 19:00 19:05
Page 36
OPERATION Page 34
ORP
AUTO
SETPOINT
ALARM OPTIONS
3 - ORP MAIN MENU
Operation
The ORP sensor is used to monitor and control a true oxidizer
like ozone, or an oxidizing sanitizer, like chlorine or bromine.
In the latter case, the controller monitors and controls the
sanitizer through the oxidation-reduction potential it produces
in the water.
The ORP Menu screen is used to access all the ORP
submenus for Control Mode, sensor calibration, setpoint and
alarm settings and shocking program (superchlorination if
using chlorine).
It also displays the actual run time for individual feed events
and the cumulative run time since last reset to zero.
3.1 - Control Mode
Line 1 shows the Control mode that is currently selected: OFF
(X), Manual (M), AUTO (A), Cycle Timer (T), Percent of Flow
(F), or Daily Schedule (S).
To change the Control Mode, select the first line with the UP or
DOWN ARROW keys and press the RIGHT ARROW key. The
Control Mode screen is then displayed.
The control mode screen and selection procedures are
common to all sensor-based control functions. See CONTROL
Submenu in this Chapter, page II-23.
Menu 3
Calibrate mV 750
Setpoint mV 700
Alarm Low mV 650
Alarm High mV 850
Time Limit min 30
Run Time 10 125
Last Shock 05/01/04
Menu 3.3
Oxidizer
Reducer
Both
Submenus 3.4.1 and 3.5.1
3.2 - Display and Calibration
The second line displays the current reading of the ORP
sensor in mV and is used to access the Calibration Submenu.
As with all sensor calibrations, the ORP sensor can be
calibrated with 1, 2 or 3-Point calibration for origin, slope and
curvature. This is done by pressing the RIGHT ARROW key to
enter the CALIBRATION Submenu. The calibration procedure
is common to all control functions. See CALIBRATION
Submenu further down in this chapter.
Since the ORP sensor is direct reading and there are no
readily available calibration solutions in the applicable range of
operations for water treatment, it normally does not require
calibration.
For other specialized applications, the calibration value may
be adjusted to allow for differences or changes in ORP sensor
readings.
3.3 - Setpoint
The ORP SETPOINT determines the ORP level that the CDCN
maintains automatically when placed in the Automatic control
mode.
Feed lockout YES
Alarm buzzer YES
To change the setpoint, press the RIGHT ARROW key and
enter the numerical value with the digital keypad. After
pressing the OK key, the SETPOINT Submenu 3.3 is displayed
asking whether the control is to be set for an Oxidizer, a
Reducer or both.
The CDCN includes one relay outlet for oxidizer and one for
reducer (de-oxidizer) feed. The normal (default) setting is for
an oxidizer. This means that the oxidizer feed outlet is
automatically activated when the sensor reading falls below the
setpoint.
Page 37
3.4 - Low Alarm
TOTAL TIME ALARM
Enter 0 for no alarm
ORP SHOCKS AND SHOTS
OPERATION Page 35
The ALARM LOW value is set to generate an alarm when the
pH reading falls below the set value. After the alarm value is
set, the ALARM OPTIONS Submenu 3.4.1 is shown, asking
whether a low alarm condition should stop the feeder and
activate the alarm buzzer.
3.5 - High Alarm
The ALARM HIGH value is set to generate an alarm when the
ORP reading rises above the set value. After the alarm value
is set, the ALARM OPTIONS Submenu 3.5.1 is shown, asking
whether a high alarm condition should stop the feeder and
activate the alarm buzzer.
3.6 - Time Limit
The TIME LIMIT sets the maximum amount of time in minutes
that is allowed for continuous feeding of the oxidizer to correct
a high or low ORP reading. This acts as a safety feature to
prevent overfeeding in case of a malfunction of the chemical
feeder or as an alarm if the feed tank runs empty. The
standard (default) value for ORP is 15 minutes but it can be
changed at any time by the operator.
3.7 - Run Time
The RUN TIME line displays two separate values: the amount
of running time in minutes for each current activation event and
the cumulative run time since last reset to zero. To reset only
the current run time, turn the control mode off and back on. To
reset the cumulative runtime, enter zero in the last column.
Submenu 3.7.1
Alarm if total
Bleed time exceeds
110 min.
Submenu 3.8
ORP Shock
ORP Deshock
ORP Booster
After the cumulative run time is reset, the TOTAL TIME
ALARM submenu 3.7.1 is displayed to set the Total Time
Alarm option. It can be used to simulate a low chemical level
alarm by entering the number of minutes needed to empty the
chemical container: i.e. container volume divided by feeder
rate (i.e.110 min = 55 ga / 0.5 gpm).
3.8 - Last Shock
The LAST SHOCK line shows the last date of Shock
Treatment. It is shown for display only, no adjustment can be
made to this date.
Press the RIGHT ARROW key to enter the Submenu 3.8 for
Shock Treatment, De-shock and Chemical Saver.
For details on the following options, see the SHOCK and
SAVER Submenu.
3.8.1 - Shock Treatment
Shock Treatment refers to treatment with an elevated level of
oxidizer which should be performed from time to time to
prevent the accumulation of noxious chemicals (chloramines)
or biological forms (algae, etc.).
3.8.2 - Deshock
Deshock refers to the addition of a reducing agent (such as
Sodium Thiosulfate) which is used to reduce excessive
amounts of oxidizer introduced during Shock Treatment.
3.8.3 - Booster
The Booster/Single Shot function is used to schedule a
delayed one-time feed event. See SHOCK AND SAVINGS in
this Chapter.
Page 38
OPERATION Page 36
TEMPERATURE
ALARM OPTIONS
4 - TEMPERATURE MAIN MENU
Operation
The Temperature Menu is used to monitor the water
temperature with the temperature sensor.
The temperature values can be used for compensation of the
conductivity and pH sensor signals. They are also used for
calculation of the Langelier Saturation Index (LSI).
All displays are either in degrees Fahrenheit for the U.S.
system of units or in degrees Celsius for the metric system.
The Temperature Menu screen is used to access sensor
calibration and alarm settings.
4.1 - Display and Calibration
The second line displays the current reading of the
Temperature sensor in either temperature units.
The Temperature sensor can be calibrated to adjust for
changes in sensor readings.
The temperature sensor can be calibrated with 1, 2 or 3-Point
calibration for origin, slope and curvature. This is done by
pressing the RIGHT ARROW key to enter the CALIBRATION
Submenu. The calibration procedure is common to all control
functions. See CALIBRATION Submenu further down in
Chapter II.
Menu 4
Calibrate F 80
Alarm Low F 70
Alarm High F 85
Submenus 4.2.1 and 4.3.1
Alarm buzzer YES
4.2 - Low Alarm
The ALARM LOW value is set to generate an alarm when the
temperature reading falls below the set value. After the alarm
value is set, the ALARM OPTIONS screen 4.2.1 is shown,
asking whether a low alarm condition should activate the alarm
buzzer.
4.3 - High Alarm
The ALARM HIGH value is set to generate an alarm when the
temperature reading rises above the set value. After the alarm
value is set, the ALARM OPTIONS screen 4.3.1 is shown,
asking whether a high alarm condition should activate the
alarm buzzer.
Page 39
OPERATION Page 37
WATER LEVEL
AUTO
WATER LEVEL
AUTO
5 - FLOW MAIN MENU
The Flow Main Menu is used to monitor the flow of water in
and out of the system (fill and bleed), the water level and the
influent/effluent pressures at the filter, and operation of the
recirculation pump.
Water Level
The water level in a water treatment system tends to decrease
constantly due to evaporation, leaks and other losses. The
water level control menu is used to add water automatically in
order to make up for these losses.
Flow Rates
The flow rates for fill and bleed and cumulative volumes are
monitored with flow meters and displayed on Menu 5.
Both can be used to determine the addition of chemicals (see
Additives Menu 7).
Due to the high cost of industrial water treatment, it is also
important to keep track of the amount of water going in and out
of the system. The flow menu is used to monitor the fill and
bleed flow rates as well as cumulative volume. The difference
between the two cumulative values can be used to estimate
the amount of water lost to evaporation and leaks.
Menu 5
Fill gpm 15
Total KGa 220
Bleed gpm 10
Total KGa 110
P influent psi 25
P effluent psi 20
Main Pump AUTO
Menu 5.1
Time Limit min 10
Run Time 5 15
Filter
Filters are used to remove solid particles from the water. As
the filter becomes progressively saturated, the influent
pressure increases. When the pressure gets too high, it is
necessary to remove the accumulated solid particles by
backwashing.
5.1 - Water Level Control Mode
The water level can be maintained automatically with a fill
valve controlled by an electro-optical sensor (P/N 138167).
As shown in Figure 16, the sensor uses the reflection of an
LED beam inside a prism to determine the position of the water
level. With no liquid present, the light beam from the LED is
reflected within the prism to the receiver. When the liquid level
reaches the prism, the index of refraction is changed and the
beam does not reflect into the receiver. For best results, the
surface of the prism must remain clean.
Submenu 5.1 is used to set the automatic fill valve to OFF,
Manual or AUTO. The submenu allows the setting of a Time
Limit for valve actuation to avoid overfilling.
It also displays actual and cumulative run times for water filling.
Figure 16 - Electro-optical Water Level Sensor
Page 40
OPERATION Page 38
FILL WATER
FILL WATER HISTORY
BLEED WATER
BLEED WATER HISTORY
5.2 - Fill Flow Rate
Line 2 displays the make-up flow rate using either a Hall Effect
or a Reed switch type flowmeter. To calibrate the meter, press
the RIGHT ARROW key to enter the Fill Flowmeter Calibration
Submenu 5.2.
The flowmeter is calibrated by entering the K-factor that is
provided by the sensor manufacturer. The K values
correspond to the number of pulses per unit of volume (gallons
or liters). They are listed below for Schedule 80 and Schedule
40 PVC Pipe, according to ASTM-D-1785.
SCHEDULE 80
DIAM (in.)
1.5 175.394 46.339
2.0 105.032 27.749
2.5 74.093 19.576
3.0 47.411 12.526
3.5 35.482 9.374
4.0 27.289 7.210
K-FACTOR
U.S. GA
K-FACTOR
LITERS
Submenu 5.2
FLOWMETER CALIBRATION
Enter number of
Pulses per unit
of volume: ____
Submenu 5.3
Total Ga 220,000
Last Reset 06/01/04
Counter 1 Ga 90,000
Start Date 06/01/04
Counter 2 Ga 20,000
Start Date 06/07/04
SCHEDULE 40
DIAM (in.)
1.5 151.145 39.933
2.0 89.666 23.690
2.5 65.054 17.187
3.0 42.703 11.282
3.5 31.661 8.365
4.0 24.387 6.443
If further adjustments are needed, note that higher K values
correspond to lower flow rates.
5.3 - Cumulative Fill
Line 3 shows the fill water cumulative flow. By pressing the
RIGHT ARROW key, the operator accesses the Fill Water
History Submenu 5.3. Three counters are available for
independent resets.
5.4 - Bleed Flow Rate
Line 4 shows the bleed water flow rate. Instructions for
calibration are the same as for fill water in paragraph 5.2.
K-FACTOR
U.S. GA
K-FACTOR
LITERS
Submenu 5.4
FLOWMETER CALIBRATION
Enter number of
Pulses per unit
of volume: ____
Submenu 5.5
Total Ga 110,000
Last Reset 06/01/04
Counter 1 Ga 45,000
Start Date 06/01/04
Counter 2 Ga 10,000
Start Date 06/07/04
5.5 - Cumulative Bleed
Line 5 shows cumulative fill. By pressing the RIGHT ARROW
key, the operator accesses the Fill Water History Submenu
5.5.
Page 41
OPERATION Page 39
PRESSURE ALARMS
ALARM OPTIONS
INFLUENT PRESSURE
INFLUENT PRESSURE
5.6 - Influent Pressure
Line 5 displays the Influent Pressure before the first filter.
This is one of the parameters that can be used to initiate the
filter backwashing operation when it exceeds a specified value
that is indicative of a dirty filter condition (see Filter Menu 7).
Pressure Alarms
Submenu 5.6 is used to specify the alarm limits for the influent
pressure in case of malfunction of the pump, filter or valves.
There is no equivalent submenu for the effluent pressure.
Submenu 5.6.1 sets the options for the alarms. If set on YES,
the Feed Limit alarm shuts off the main pump and the buzzer
alerts the operator.
Calibration
Upon exiting Submenu 5.6.1, the calibration submenu 5.6.1.1
is displayed. The pressure sensor is calibrated by entering a
factor representing the output in volts per unit of pressure, as
specified by the manufacturer of the sensor.
The factory set default factors of 0.43 and 0.50 are valid for
the transducer in the pressure range of 0 to 60 pi. It should
normally not require any adjustment.
Submenu 5.6
Alarm low psi + 10
Alarm high psi + 50
Submenu 5.6.1
Feed Limit NO
Buzzer NO
Submenu 5.6.1.1
5.7 - Effluent Pressure
Line number 7 in the Pump Menu screen shows the value of
the Effluent Pressure, i.e. after the filter(s).
Submenu 5.7 is used for calibration of the effluent pressure
sensor, if different from the influent sensor. It is calibrated in
the same way as the Influent Pressure sensor.
Differential Pressure
The value of the Differential Pressure (Influent Pressure minus
Effluent Pressure) is automatically calculated by the controller.
This is another parameter that can be used to initiate the filter
backwashing operation when it exceeds a specified value that
is indicative of a dirty filter condition (see Filter Menu 7).
Enter Pressure
factor: 0.43
Submenu 5.7
Enter Pressure
factor: 0.43
Page 42
OPERATION Page 40
PUMP
PUMP
ON
OFF
5.8 - Main Pump Control
Line 8 shows the mode of operation of the recirculation pump:
on, off, or on a weekly schedule. Press the RIGHT ARROW
key to enter the Control Mode Submenu 5.8.
When AUTO is selected, the Pump 7-day Weekly Schedule
Submenu 5.8.3 is displayed. Daily ON and OFF times can be
selected by the operator. If nothing is selected, the pump
stays on all the time.
All scheduled times should be entered in the 24:00 hour
format. Different times can be entered for different days. This
allows for reduced costs of operation on weekends.
Thirty seconds before the pump starts automatically, the alarm
sounds a warning beep in case maintenance operations are
being performed.
Submenu 5.8
Off
Manual
Automatic
Submenu 5.8.3
Mo 06:00 20:00
Tu 06:00 20:00
We 06:00 20:00
Th 06:00 20:00
Fr 06:00 20:00
Sa 06:00 18:00
Su 09:00 18:00
Page 43
6 - ADDITIVES MAIN MENU
ADDITIVES
BLEED AND FEED
BLEED THEN FEED
INIHIBITOR
FLOW
Operation
OPERATION Page 41
Menu 7
The ADDITIVES menu is used to program the addition
chemicals that cannot be controlled through sensor input, such
as: corrosion and scale inhibitors, non-oxidizing biocides,
flocculants, dispersants, etc.
The additive menus can be customized by selecting names in
the Configuration/Initial Set Up/Model Options/Additives
submenu 8.1.7.7 from a pre-defined list. Menu 7 on the right
shows a typical customized menu but other names can be
selected.
Menu 7 is used to access each ADDITIVE submenu to set the
control mode, alarms, display of individual feed events and
cumulative run times.
Because all additive submenus are identical, only the menu for
the first additive is shown here.
6.1.1 - Control Mode
Line 1 shows the Control mode that is currently selected: OFF
(X), Manual (M), AUTO (A), Cycle Timer (T), Percent of Flow
(F), or Daily Schedule (S). To change the Control Mode, select
the first line with the UP or DOWN ARROW keys and press the
RIGHT ARROW key. The Control Mode screen is then
displayed.
The control mode screen and selection procedures of modes
OFF, Manual, Cycle Timer, Percent of Flow and Daily
Schedule are common to all control functions. See CONTROL
Submenu at the end of this Chapter for detailed explanations.
Inhibitor F
Descaler A
Biocide S
Flocculant T
Submenu 7.1
Time Limit min 30
Run Time 10 125
Booster NO
Submenu 7.1.1.3.1
Feed % 100
Max Time min 30
Daily Schedule NO
The AUTOMATIC control mode is different for Additives: The
operator can select either Bleed-and-Feed or Bleed-then-Feed
(post-bleed as a percent of bleed) control.
6.1.1.3.1 - Bleed and Feed
In the Bleed-and-Feed control mode, the controller activates
the control outlet at the same time that water is bled.
In the Bleed and Feed Submenu 7.1.1.3.1, line 1 specifies the
percentage of bleed time.
Line 2 shows the maximum time in minutes allowed for
feeding.
If additional feeding is required, line 3 is used to set
complementary feeding on a daily schedule.
6.1.1.3.2 - Bleed then Feed
To prevent the loss of additives with bleed water, Bleed-thenFeed can be used.
In the Bleed-then-Feed control mode, the controller activates
the feed only after bleed is completed as a percentage of bleed
time.
The Bleed-then-Feed submenu 7.1.1.3.2 includes the Bleed
Lockout option (submenu 7.1.1.3.2.4).
Submenu 7.1.1.3.1
Feed % 50
Max Time min 30
Daily Schedule NO
Bleed Lockout YES
Page 44
OPERATION Page 42
BLEED LOCKOUT
TOTAL ALARM TIME
BO
OSTER
6.1.1.3.2.4 - Bleed Lockout
The Bleed Lockout submenu 7.1.1.3.2.4 is used to prevent
bleed during - or immediately after - feeding of chemicals and
to specify pre-bleed and/or pre-pH feed operations.
Submenu 7.1.1.3.2.4
Line 1 displays the bleed lockout time in percentage of feed
time. A value superior to 100% prevents bleed during and
after feed.
Line 2 displays the lock memory option to accumulate feed
lockout time until bleed is completed.
Line 3 and 4 display the pre-bleed option to reduce the risk of
deposits due to increasing conductivity or TDS level during a
lockout period. The pre-bleed can be specified for a length of
time and/or until a conductivity level is reached.
The Pre-pH option is used to adjust the pH level before
additive feed. The pH feed can be set for a length of time (line
5) and/or until a pH level is reached (line 6). The controller
maintains the pH level during the entire feed cycle.
6.1.2 - Time Limit
Line 2 shows the maximum amount of time in minutes that is
allowed for continuous feeding of the additive. This is
designed to alert the operator in case of a malfunction of the
chemical feeder.
7.1.3 - Run Time
The RUN TIME displays the time in minutes for current
activation and cumulative run time since last reset to zero.
Lockout % 150
Lock memory YES
Pre-bleed min 10
Pre-bleed uS 1900
Pre-pH min 0
Pre-pH pH 7.0
Submenu 7.1.3
Alarm if total
Feed time exceeds:
110 min
Enter 0 for no alarm
Submenu 7.1.4
To reset the cumulative run time, enter zero in the last column.
To reset only the current run time, turn the control mode off
and back on.
After the cumulative run time is reset, the TOTAL TIME
ALARM submenu (see submenu 7.1.3) is displayed to set the
Total Time Alarm option. It can be used to simulate a low
chemical level alarm by entering the number of minutes
needed to empty the chemical container: container volume
divided by feeder rate (i.e.110 min = 55 ga / 0.5 gpm)
7.1.4 - Booster/Single Shot
The Booster (Single Shot) function is used to schedule a
delayed one-time feed event (i.e. feeding the biocide at 1:00
AM for an hour). It is independent of the other control modes.
The Booster Submenu 7.1.4 allows selection of the date, start
time and duration of the feed event. Selection of line 4 leads to
the Bleed Lockout submenu 7.1.1.3.2.4.
Date 08/31/04
Start Time 21:00
Run Time 1:00
Bleed Lockout YES
Page 45
OPERATION Page 43
CONTROL TYPE
Deadband %: 4
PROGRESSIVE ZONE
CONTROL SUBMENUS
The CONTROL Submenus for controls with sensor input
(Conductivity, pH and ORP) are common to each other. The
Additives Control submenus are also common, but Automatic
control. Automatic control for additives is described in the
ADDITIVES menu 7.
To simplify the presentation, the Control Submenus use the
letters X and Y. X can be: 1 for Conductivity, 2 for pH or 3 for
ORP. Y is for control type (ORP or pH only, see below): 1 for
ON/OFF, 2 for Proportional and 3 for Progressive,
X.1 - Control Type
The first screen of the Control Submenu is used to select the
control type: OFF (X), Manual (M), AUTO (A), Cycle Timer (T),
Percent of Flow (F), or Daily Schedule (S).. Use the UP and
DOWN keys to highlight the desired selection and then press
the RIGHT ARROW key to confirm the selection.
If the operator selects OFF, the controller turns off the feed
control outlet immediately and returns to the previous menu.
If the operator selects Manual, the controller turns on the feed
control outlet immediately and returns to the previous menu.
CAUTION: When set to Manual, the outlet remains activated
until reset to off - regardless of the sensor
readings. If the run time exceeds the Time Limit
set by the operator in the specified submenu, the
outlet will be turned off to prevent overfeeding.
Submenu X.1
OFF
Manual
Automatic
Cycle Timer
Percent of Flow
Daily Schedule
Submenu X.0.1
Dead area to
prevent chatter
near setpoint
(usually 4%)
Submenu X.0.2
X.Y.1 - Deadband
In all three automatic control modes (ON/OFF, Proportional
and 4-20 mA), the controller uses a deadband zone near the
setpoint to prevent chattering of the relay. The deadband is
expressed as a percentage of the setpoint value and can be
adjusted by the operator on the DEADBAND screen.
With the deadband, the outlet remains activated until the
sensor reading reaches the setpoint, at which point it is deactivated. In order for the relay to be re-activated, the reading
has to get outside the deadband, thus eliminating the effect of
small fluctuations.
X.Y.2 - Progressive Zone
The PROGRESSIVE ZONE is a control zone around the
setpoint where the outlet activation depends on how far the
sensor reading is from the setpoint (see schematic above).
If the sensor reading is outside of the zone, then the outlet is
turned on 100% of the time. The activation rate then
decreases progressively as the reading nears the setpoint
value. It reaches 0% when the reading enters the deadband
zone near the setpoint.
This control mode is available in Proportional Control only (see
next page). It provides more precise control than ON/OFF
control and reduces overfeeding, particularly in smaller bodies
of water.
Zone: 10 %
Progressive zone
around setpoint
from 0 to 100%
(usually 10%)
Page 46
OPERATION Page 44
4-20 mA Limits
AUTOMATIC CONTROL
CYCLE TIMER
X.1.3 - Automatic Sensor Control
In Automatic Control with pH or ORP sensor input, the operator
can choose among two different Control Modes: ON/OFF,
Proportional. Conductivitycontrol uses only ON/OFF control.
X.1.3.1 - ON/OFF Control
In the ON/OFF Control mode, the controller activates the
control outlet until the setpoint is reached, at which point it is
turned off. It is turned on again when the reading is outside of
the deadband.
Selection of the ON/OFF control mode leads to the
DEADBAND submenu screen X.0.1 (see previous page).
The ON/OFF control mode is recommended to obtain fast
corrections to return to the setpoint rapidly, if there is no
concern about overshooting (overfeed). This is particularly
applicable to larger bodies of water.
Proportional Control is recommended for more precise control,
especially in smaller bodies of water,
X.1.3.2 - Proportional Control
In the Proportional Control mode, the controller turns the feed
on and off at a rate varying from 0% to 100% of a 15-minute
time cycle.
Proportional control applies only within the Progressive Zone
(Submenu X.0.2 on previous page).
Submenu X.1.3.2.1
ON/OFF
Proportional
4-20 mA
Proportional Control
Submenu X.1.3.3.1
ORP Top 850
ORP Bottom 650
The wider the Progressive Zone is, the more slowly and
precisely the controller will return to the setpoint. As the width
of the Progressive Zone is decreased, the reaction becomes
faster and faster until eventually one approaches the
conditions of ON/OFF control.
X.1.3.3 - 4-20 mA Control
This type of control is designed for electronic pumps with linear
response to current inputs. It appears on the display only
when the option is installed.
Instead of relays, the controller sends an electronic signal from
4 to 20 mA. The output is proportional to the distance from the
setpoint. For instance, a 4 mA output corresponds to a 0%
feed rate, 12 mA to 50% and 20 mA corresponds to 100%.
The values of the 0 and 100% limits are adjustable for each
function, as shown in submenu X.1.3.3.1 for ORP.
X.1.4 - Cycle Timer
Timer Control mode is available as a temporary control mode if
a sensor is defective or not available.
In this mode, the controller activates the control outlet
according to fixed ON and OFF cycles. Each cycle is
adjustable in 0.1 minutes increments.
Selection of the Bleed lockout function, displayed on line
3, is used when it is desirable to lock chemical feed during
bleed and lock bleed during and after feed. It leads to the
Bleed lockout Submenu X.1.4.2.3 (described above).
Submenu X.1.4.1
Cycle ON (min) 0.1
Cycle OFF (min) 1.0
Bleed Lockout YES
Page 47
OPERATION Page 45
PERCENT OF F
LOW
BLEED LOCKOUT
DAILY SCHEDULE
X.1.4.2 - Percent of Flow
In this mode, the controller activates the control outlet for a
length of time that is proportional to the volume of fill water as
monitored by the fill flowmeter (gallons or liters).
Submenu X.1.4.1
The % Flow Submenu X.1.4.2 displays the amount of time in
minute for the selected volume of water.
The Bleed lockout function on line 3 prevents bleed during and
after feed and specifies pre-bleed and/or pre-pH functions. It
leads to the Bleed lockout Submenu X.1.4.2.3.
X.1.4.2.3 Bleed Lockout
The Bleed Lockout submenu X.1.4.2.3 is the same as for the
additives menu. It is used to prevent bleed during - or
immediately after - feeding of chemicals and to specify prebleed and/or pre-pH feed operations.
Line 1 displays the bleed lockout time in percentage of feed
time. A value superior to 100% prevents bleed during and
after feed.
Line 2 displays the lock memory option to accumulate feed
lockout time until bleed is completed.
Line 3 and 4 display the pre-bleed option to reduce the risk of
deposits due to increasing conductivity or TDS level during a
lockout period. The pre-bleed can be specified for a length of
time and/or until a conductivity level is reached.
The Pre-pH option is used to adjust the pH level before
additive feed. The pH feed can be set for a length of time (line
5) and/or until a pH level is reached (line 6). The controller
maintains the pH level during the entire feed cycle.
Feed Time min 0.5
Fill water ga 10
Bleed Lockout NO
Submenu X.1.4.2.3
Lockout % 150
Lock memory YES
Pre-bleed min 10
Pre-bleed uS 1900
Pre-pH min 0
Pre-pH pH 7.0
Submenu X.1.5
X.1.5 - Daily Schedule Control
In the Daily Schedule Control mode, the controller activates the
control outlet for selected daily intervals - regardless of sensor
input. Selection of the Daily Schedule control mode leads to
the Daily Schedule Submenu screen X.1.5.
The operator selects the date of the first treatment (“Next
Date”) and the cycle in days for repeat treatments. The
operator also sets the start time and duration (in minutes) of
the treatment. “Last Date” shows date of last treatment.
The Bleed lockout function on line 5 prevents bleed during and
after feed and specifies pre-bleed and/or pre-pH functions. It
leads to the Bleed lockout Submenu X.1.4.2.3.
Next date 08/31/04
Cycles (day) 2
Start Time 21:00
Run Time (min) 30
Bleed Lockout YES
Last date 08/15/04
Page 48
OPERATION Page 46
CALIBRATION OPTIONS
1-PT CALIBRATION
3-PT CALIBRATION
CALIBRATION SUBMENUS
X.2 - Calibration Options
The CALIBRATION Submenu is common to all the functions
that require sensor calibration. This includes Conductivity, pH,
Temperature and ORP. Pressure and Flow have only direct 1point calibration.
The CALIBRATION OPTION Submenu X.2 is used to select
the number of calibration points desired. Most applications
require only 1- Point calibration but any number up to three can
be selected. If more than 1-point calibration is selected, the
operator needs to use calibrated buffer solutions. These
sample solutions must be spaced sufficiently from one another
to yield meaningful calibration values.
X.2.1 - One-Point Calibration
When using 1-Point calibration, the conversion curve for the
sensor readings is a straight line using the standard (default)
slope built in the program.
1-Point calibration should be satisfactory for most applications.
The operator places the sensor in a single water sample and
tests it with an appropriate test kit. The value obtained is then
entered on the calibration screen as the new display value.
The controller uses the calibration value that has been entered
by the operator to calculate the origin “a” of the representative
linear equation:
Submenu X.2
1 Point (zero)
2 Point (slope)
3 Point (curve)
Use 1, 2 or 3 points depending
on accuracy needed
Submenu X.2.1
Point 1 7.5
Submenu X.2.2
2-PT CALIBRATION
DISPLAY = a + SLOPE * INPUT
X.2.2 - Two-Point Calibration
With 2-Point calibration, the operator needs to use two different
solutions with values that are spaced widely enough to show
significant differences in the slope of the calibration curve.
The controller uses these values to compute the origin “a” and
slope “b” in the equation:
DISPLAY = a + b * INPUT
X.2.3 - Three-Point Calibration
With 3-Point calibration, the representative straight line is
replaced by a second-degree polynomial curve. The operator
needs three different solutions, again with values that are
spaced widely enough to show differences in the curvature of
the polynomial.
The controller uses these values to compute the origin “a”,
slope “b” and curvature “c” in the equation:
DISPLAY = a + b * INPUT + c * INPUT*INPUT
Point 1 7.5
Point 2 10.0
Submenu X.2.3
Point 1 4.0
Point 2 7.5
Point 3 10.0
Page 49
OPERATION Page 47
ORP SHOCK AND SHOTS
ORP SHOCK
AUTO
ORP BOOSTER
SHOCK AND SAVINGS SUBMENUS
3.8 - Treatment Selection
The various types of shock treatment and recovery are
selected from the following menu screen.
The Shock Treatment program is used to raise the level of
oxidizer or sanitizer in the water in order to destroy harmful
elements - such as chloramines, germs and algae - that
develop immunity to normal chemical levels.
The Deshock program normally follows the Shocking program
automatically in order to return the concentration levels back to
normal values.
The Booster program is used to is used to schedule a delayed
one-time feed event, such as during nighttime or on weekends.
It is independent of other control modes.
3.8.1 - ORP Shock Program
The Shock Treatment Submenu allows the operator to set the
program to OFF, ON or AUTO.
When set to ON, the Shock Treatment program starts
immediately. When set to Automatic, the operator selects the
date of the first treatment and the cycle in weeks for repeat
treatments. He also sets the time to start and time to stop as
well as the level of shock treatment to reach, in mV for Shock
Treatment or in ppm or mg/l for Superchlorination.
Submenu 3.8
ORP Shock
ORP Deshock
ORP Booster
Submenu 3.8.1
Shock date 08/10/04
Cycle (weeks) 1
Time on 21:00
Time off 23:30
Level 850
Bleed lockout NO
Submenu 3.8.3
Chemical injection stops when either the set level is reached or
the end time is reached.
3.8.2 - ORP Deshock Program
The deshock program is set to feed a reducing agent - such as
Sodium Thiosulfate - to eliminate excessive amounts of
sanitizer after superchlorination. The operator may set the
desired level, and the time limit in hours for the deshock
process. When enabled, deshock immediately follows the
shock treatment process. It stops when either the set level or
the time limit is reached.
3.8.3 - ORP Booster
The Booster program is used to is used to schedule a delayed
one-time feed event, such as during nighttime or on weekends
(i.e., feeding the oxidizing biocide at 1:00 AM for an hour). It is
independent of other control modes.
The Booster Submenu allows selection of the date, start time,
and duration of the feed event. Selection of line 4 leads to the
bleed lockout submenu X.1.4.2.3.
Date 08/31/04
Start Time 21:00
Run Time 1:00
Bleed Lockout YES
Page 50
COMMUNICATIONS Page 48
CHAPTER IV - COMMUNICATIONS
Figure 17.0 - Program Main Menu
COMMUNICATION OPTIONS
The CDCN controller offers several options for remote
communications by computer or telephone:
- All CDCN controllers include a serial RS232 port for on-
site data download.
- Option RS485 includes an RS485/RS232 converter for
on-site remote computer control with Communication
Software,
- Option COMM includes an internal modem for remote
computer control using software,
- Option TEL includes telephone communications with a
touch-tone phone,
- Option 420 converts sensor readings to 4-20mA signals.
REMOTE OPERATION OPTIONS
Direct Connection
The RS485 communication port for the RS485 option is
located on the Mother Board (See Figure 5 or Figure 7).
Connect the wire cables of the RS232/RS485 converter to the
RS485 port and to the computer RS232 port.
Modem Connection
The data/voice modem and the US-type RJ11 phone jack for
the COMM2 option are mounted on the lower right hand side of
the mother board (See Figure 5 or Figure 7).
Use a standard phone extension cable to connect the jack on
the controller to a direct outside telephone line (no
switchboard). The phone line does not have to be a dedicated
line. It can be used for other communications when not in use
for the controller. When called by a remote computer, the
controller answers on the first ring unless somebody picks up
the phone before.
The remote computer connects through a communication port
that has to be specified in the communication software
program, i.e. COM1, COM2, COM3 or COM4.
Computer Software Installation
The CDCNTrol computer software program for remote
operation is provided on CD-ROM.
To install it in Windows®, click on Start/Run and type A:setup.
The program gets installed in the Program Files / CHEMCOM
directory.
It creates an icon that can be dragged to the Windows®
Desktop screen using Windows® Explorer. To start the
program, click on the icon.
Software Program
The main screen of the program is shown on Figure 17.0.
Menu 1 INSTRUCTIONS shows operating instructions.
Menu 2 SYSTEM SETUP is used to setup the communication
port, i.e. COM1, COM2, COM3 or COM4.
Menu 3 FACILITIES is used to enter the name and phone
number of each facility and the model number of the controller,
i.e. CDCN12 or CDCN13. Select “modem” for remote operation
by modem connection or “direct” for remote operation by direct
(RS485) connection.
For automatic scanning, the facility should be set to A (Active).
Menu 4 SCANNING SCHEDULE is used to select the
automatic scanning mode: continuous, at regular intervals or
on a set schedule.
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COMMUNICATIONS Page 49
Select either Menu 6 for REMOTE CONTROL of one facility or
Menu 7 for AUTOMATIC SCANNING of multiple facilities.
To establish connection from a remote computer, select Menu
6 on the Main Menu of the software program and click on the
name of the remote facility.
The program dials the phone number for the remote modem or
establish direct connection via the RS485 port to connect to
the controller, showing a true duplex representation of the
controller screen, as shown on Figure 117.1.
True duplex operation means that all the moves and
operations on the remote computer screen are simultaneously
executed in real time on the controller screen, and vice versa.
This allows 100% remote control of all operating functions.
Navigation through the menus and submenus on the remote
computer is done exactly as with the actual controller, by using
the computer arrow keys or, under Windows®, by clicking on
the arrows shown on the computer screen with the mouse.
Figure 17.1 - Remote Operation Screen
The remote operator can verify all operating conditions at a
glance.
Line 1 shows the Conductivity readings at 2000S/cm with
the bleed valve on (>) in the automatic bleed mode (A).
Line 2 shows a pH reading of 8.5 in the Automatic mode (A).
Line 3 shows an ORP reading of 750 mV with no oxidizer
pump feeding (X).
Line 4 shows a Temperature reading of 72 F.
Line 5 shows the Fill and Bleed flowrates of 15 and 10 gpm
respectively with the fill valve activated in the
Automatic mode (A).
Line 6 shows that the
(M) with influent and effluent pressures of 25 and 20
psi respectively.
Line 7 shows that the Additive 1 is in the Timer mode (T),
Additive 2 and 3 in Daily Schedule mode (S), and
Additive 4 in OFF mode (X).
Line 8 shows the Date and Time and the saturation condition
as OK. This last line also gives access to the
Configuration Menu.
Filter Backwash
is in Manual mode
Automatic Scanning
To start automatic scanning, select Menu 7 on the
Communication Software Main Menu. The modem on the
computer automatically starts calling the remote facilities that
have been marked as Active in the Facilities setup menu.
The operator can monitor single or multiple remote facilities
from a remote PC computer screen, using a variety of
scanning schedules. In the automatic mode, it scans all the
facilities that have been set up as Active (A) in the FACILITY
Menu (Figure ).
When the remote controller is contacted, the test data is
displayed on the computer screen, as shown below, and stored
on disk file for later recall. Alarm conditions are alerted with
flashing displays and audible beeps.
For unattended monitoring, a dedicated computer is
recommended. However, the computer can also be used for
other tasks under Windows® while the Communication
Software program runs in the background.
Figure 18 - Remote Scanning Screen
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COMMUNICATIONS Page 50
Log Display
Data logged in the controller can be downloaded on site or
remotely by computer, using the Submenu 8.2.4 for
Operations/Print Reports, as explained in Chapter II.
The data is stored as a text file in the computer. It can be
displayed as text data using any conventional word processor.
It can be displayed directly through the program - as shown on
Figure - using Menu 8 DISPLAY DATA and VIEW.
The test data can also be easily copied and incorporated into
other documents, such as reports to management or to the
health department.
Graphic Data Display
The data log can be displayed graphically with the software
program, using Menu 8 for DISPLAY DATA and GRAPH.
As shown on Figure 20, the graphics program displays two
parameters simultaneously, such as ORP as a main variable
and pH as an overlay, as shown on the right.
By clicking on the ZOOM ENABLE icon, windows can be
drawn around parts of the graphs to display enlarged and more
detailed views for selected dates or times. The left and right
arrows allow scanning of the graph in either direction. To
return to the full graph, click on ZOOM RESET.
The tool bar can be turned on to allow changes in scales, type
of display and colors.
Using the ALT/Print Screen WINDOWS command, the graphic
data display can also be copied as an image to other
documents or reports.
Figure 19 - Data Log Display
Figure 20 - Graphic Data Display
Page 53
COMMUNICATIONS Page 51
VOICE TELEPHONE STATUS REPORT
CONDUCTIVITY 1500 OFF/MANUAL/AUTO/TIMER/FLOW/SCHEDULE On/Off
pH 7.5 OFF/MANUAL/AUTO/TIMER/FLOW/SCHEDULE On/Off
ORP 725 OFF/MANUAL/AUTO/TIMER/FLOW/SCHEDULE On/Off
TEMPERATURE 78
PUMP 15 OFF/MANUAL/AUTO On/Off
FILTER 25 OFF/MANUAL/AUTO On/Off
TELEPHONE (OPTION TEL)
The Telephone (TEL) option supplements the Remote
Operation (COMM) option. Available for the CDCN13
controllers, it includes two forms of telephone communications
using touch-tone phones:
- voice status reports,
- alarm callouts.
Voice Status Reports
The easiest way to communicate with the controller from a
remote location is with a simple touch-tone telephone.
At any time, the CDCN with the TEL option will answer an
incoming phone call. The unit will first respond with modem
tones, in an attempt to connect to a computer.
If code numbers have been specified in the Initial Setup
Submenu, the controller waits without prompting until the caller
enters his code number on the touch-tone phone. After a valid
number is entered, the unit delivers the current status report.
As shown above, the status report includes:
- function name,
-
current value,
- applicable operating mode and
- applicable operational status.
Alarm Callouts
Up to six different emergency phone numbers can be called
when an alarm condition exists. The phone numbers are
entered in the Telephone Data screen through the
Configuration/Communications Submenu 8.3.1 (see Chapter
II).
If any alarm occurs, the unit will dial in sequence the phone
numbers entered in the Communication Submenu.
After dialing the unit ID and an alarm message is repeated
verbally several times. When someone answers and enters a
valid password, the unit stops calling and deliver the alarm
message.
"Alarm Unit __"
4-20 mA SIGNAL (OPTION -A)
The 4-20 mA output is an option (OPTION -A) that includes a
converter board to convert sensor readings and/or control
outputs into analog signals that can be fed into analog
monitoring equipment (BMS) or control equipment (pumps or
valves with analog control circuitry).
The converter board plugs into the JP1 header, on the
controller motherboard. (Figure 5, page 13).
The status report is repeated until the caller enters a number
for a Main Menu or hangs up.
The four analog signals for Conductivity, pH, ORP and
temperature are set at the factory with the 4 mA and 20 mA
limits corresponding to the Low and High alarm values for each
parameter. These limits can be adjusted individually by the
operator through the controller Submenu 8.3.4.
Page 54
CONTROLLER STARTUP
STARTUP Page 52
CHAPTER V - STARTUP
Configuration Menu
The CDCN is tested and shipped from the factory with the
standard default values that are programmed in the controller.
Upon startup, it is recommended to verify the initial setup through
the CONFIGURATION Menu (Submenu 8.1) and to adjust the
values as required. This includes adjusting the clock for different
time zones and selecting the proper language and units system.
Alarm Buzzer
To avoid unnecessary noise, the Audible Alarm option is normally
turned off until the sensors are installed. Remember to turn it
back on for normal operation (Submenu 8.2.1).
Bypass Line
The Bypass Line Option is normally turned off to allow initial
chemical feeding upon startup. It is important to turn it back on
(Submenu 8.2.2) as soon as the Safety Flow Switch is installed,
to prevent accidental feeding when there is no water flow in the
bypass line.
Battery Check
Check the condition of the Backup Battery. It prevents the loss of
memory data in case of power shutdown. The voltage of the
battery can be verified through the CONFIGURATION Menu
(Submenu 8.2.6).
If the battery voltage is less than 2.5V, the battery should be
replaced with a 3Vlithium battery, CR2330 or equivalent.
BLEED AND CHEMICAL CONTROL
Initial Activation of Sensors
For a new installation, it is recommended to wait for a week or
two after filtration is started (if filters are used on the system)
before installing the sensors. This will prevent damage to the
sensors until all the dirt and debris have been filtered out of the
water.
When ready to start the CDCN, install the sensors in the
recirculation line and run the recirculation pump for 15 to 30
minutes or until the readings of the sensors stabilize.
Bypass Line Test
If there is a bypass line, open the sampling tap on the bypass line
and adjust the two shutoff valves until there is a smooth flow of
water coming out of the tap (no suction or excessive pressure).
Conductivity and Chemistry Adjustment
Before starting automatic control, the water chemistry should
be adjusted to near the recommended values for
conductivity/temperature, pH and ORP. The chemicals can
be added manually or with the controller set on Manual
Mode.
NOTE: The controller will not operate in the Automatic
Mode if the sensor readings are below or above the
alarm settings.
Water Sampling
Proper water sampling is essential for accurate calibration of
the conductivity/temperature, pH and ORP sensors. The
preferred method is to sample the water as close as possible
to the location of the sensors, usually on the bypass line.
The bypass line should be therefore equipped with a water
sampling tap, which can consist simply of a ball valve.
Because of the instability of chlorine, particularly under
sunlight, samples taken near the surface of the water can
give false results.
Conductivity Calibration
Test the conductivity of the water at least twice with a
portable conductivity meter or until you get consistent
readings. Make sure that controller and portable meter use
temperature compensation at 25oC.
If the portable meter value differs from the value shown on
the controller display, using a calibrated standard solution,
select Conductivity Menu and Calibration Submenu and
enter the value indicated on the reference solution, using the
1-Point Calibration option. For more accurate calibration
with 2 or 3 points, conduct the same process with two or
three different conductivity values using calibrated standard
solutions of appropriate values.
pH Calibration
NOTE: Always calibrate the pH sensor first, before the
sanitizer.
Test the pH of the water at least twice with a fresh solution of
a standard Phenol Red test kit, or until you get consistent
readings.
- If the pH is below 7.0:
CORROSIVE CONDITION. Add a base (Soda Ash,
Caustic Soda NaOH, pH PLUS, pH UP, etc.) to raise it.
CAUTION: POSSIBLE
- If the pH is above 8.0: CAUTION: POSSIBLE SCALING
CONDITION. Add an acid (Muriatic Acid, Hypochloric
Acid HCl, Sodium Bisulfate, etc.) to lower it.
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STARTUP Page 53
If the test kit value differs from the value shown on the controller
display, select pH Menu and Calibration Submenu and enter the
value indicated by the test kit, using the 1-Point Calibration
option.
For more accurate calibration with 2 or 3 points, repeat the same
process at two or three different pH values using calibrated
standard solutions of appropriate values. Most common values
are for pH 4.0, 7.0 and 10.0.
pH Feed (Acid or Base)
The CDCN13 has both Acid and Base feed outlets for pH control.
Acid Feed is activated when the pH is above the setpoint and
Base Feed when it is below the setpoint.
In most cases, only one type of chemical is required, i.e. either
acid or base, depending mostly on the type of sanitizer used.
Make sure to connect the acid or base chemical feeder to the
proper outlet on the Power Board (see the INSTALLATION
chapter).
pH Setpoint
The default value for the pH setpoint is 8.5. It can be modified at
any time through the pH Menu.
Shock Treatment
It is recommended to wait several weeks before using the
automatic superoxidation cycle, or until all the other
operating functions of the controller have been properly
tested out.
SATURATION INDEX
The CDCN features automatic calculation of the Langelier
Saturation Index (Submenu 8.2.3).
It is recommended to check the water saturation as soon as
possible after installation to prevent damage to the
equipment through corrosion or scaling. This should be
done immediately after calibration of the pH and temperature
sensors, using a reliable test kit to obtain the alkalinity and
calcium hardness values.
ORP Calibration
The ORP sensor is direct reading and does not require
calibration.
ORP Setpoint
The default value for the ORP setpoint is 700 mV. It can be
modified at any time through the ORP Setpoint Submenu.
The controller will automatically activate the chlorinator,
brominator or ozonator whenever the reading is below the ORP
deadband. It will stop automatically as soon as the reading is
above the ORP setpoint.
ADDITIVES Feed
The CDCN13 has four (4) feed outlets for chemical additives
such as inhibitors, biocides, descalers, etc. Each additive Feed
can be controlled manually, automatically (bleed & feed, bleedthen-feed), on cycle timer, as a percent of flow, or following a
daily schedule.
In most cases, corrosion and scale inhibitors are fed
automatically or on percent of flow, while biocides are fed on
daily schedule.
Time Limits
The Time Limits for each outlet should be set for the length of
time that can be safely tolerated for chemical overfeeding - in
case of equipment malfunction or operator error. This time varies
with each installation, based on the size of the installation
(gallons of water) and the feed rate of the chemical feeders.
Page 56
CHAPTER VI - MAINTENANCE
CONTROLLER MAINTENANCE
MAINTENANCE Page 54
- store at room temperature
- keep the protective cap on the sensor with a few drops of
water to keep the tip moist. Check periodically that there
is always some water inside the cap.
- store the sensors with the tips down to prevent the air
bubble from migrating toward the junction,
- shock the sensor with chlorine if stored over 3 months.
Regular Maintenance
The CDCN controller requires very little maintenance besides
cleaning of the sensors and replacement of the battery, if
needed, after a long shutdown.
How often the sensors require cleaning depends on the quality
and flow of water. Use the Acid Test below to check the pH
and ORP sensors. It is recommended to schedule preventive
cleaning programs on a weekly or monthly basis.
The Acid Test
Caution: When handling hydrochloric (muriatic) acid, always
follow the manufacturer’s handling precautions and guidelines.
Use only as directed.
The Acid Test can be used to check the pH and ORP sensors
on line.
Carefully add a small amount (½ cup or less) of hydrochloric
(muriatic) acid HCl in the intake side of the recirculation line,
upstream of the sensors, and observe the pH and ORP
readings on the Main Display. After a few minutes, the pH
reading should go down and the ORP reading up. After
several minutes, both readings should return to their original
values.
Sensor Cleaning
Battery Replacement
The memory battery is located in the upper left corner of the
Mother Board. It keeps the configuration, operational and
calibration settings in memory if the power supply is shut down.
A low battery condition does not affect the operation of the
controller as long as the main power is on.
To check the voltage of the battery, go to Configuration /
Operations / Battery to display Submenu 8.2.6.
If the battery shows a voltage below 2.5 V, it should be
replaced with a 3V lithium battery, CR 2330, CR2032 or
equivalent.
To replace the battery, turn off the power to the controller, slide
out the old battery and insert the new one, making sure to set it
in with the positive (+) side up.
After full power shutdown, the controller reverts to the original
factory default settings. You must re-enter your own settings if
they are different.
Software Upgrade
The software program in the CDCN controller can be upgraded
by replacing the program and display chips that are located on
the Mother Board. To avoid damaging the chips, follow the
procedure below carefully.
The sensors may stop reading properly if they become coated
with a film of oil, calcium or dirt.
To clean the pH Sensor, carefully remove it from the
compression fitting and clean the tip in a liquid soap solution
(such as Joy, Palmolive, etc.). If it still does not work, dip it
again for 5 to 10 seconds in muriatic acid (hydrochloric acid
HCl). Rinse in clean water and reinsert it in the fitting.
For the ORP Sensor, use the same procedure.
The electrodes of the Conductivity Sensor can be cleaned
with a mild abrasive (brush or sandpaper) to remove nonconducting deposits.
The prism of the Water Level Sensor can be cleaned with a
gentle soap solution and a soft tissue. Do not use chlorinated
hydrocarbons (acetone, gasoline, etc.).
1. Disconnect all power to the unit and remove the jumper J1 (J3
for CDCN12) next to the battery on the motherboard.
2. Locate the Program Chip U2 and the Display Chip U3 (U28
and U8 for CDCN12) in the upper section of the board.
3. Insert a flat screwdriver under the old chip and pry it gently
away from its socket. Store it as a backup.
4. Handle the new chip carefully and avoid electrostatic
discharge. Identify the chip orientation with the small halfmoon indent upward for the CDCN13 (downward for CDCN12).
CAREFUL: wrong installation will damage the program.
5. Make sure all the pins are straight. Insert the new chip in the
socket by aligning all the pins on one side first, then on the
other side, applying lateral pressure to facilitate insertion.
6. Replace the jumper in J1 (J3 for CDCN12) and restore power
to the controller. You should see the CDCN logo displayed
on the screen twice. When the display screen shows asterisks
(***) for date and time, you are assured that the old program
has been erased in its entirety.
7. Reprogram the controller to your desired parameters.
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MAINTENANCE Page 55
CHEMICAL MAINTENANCE
Overview
For best results, it is strongly recommended to have a primary
operator in charge of water maintenance and testing, as
different people can read the test kits differently.
ORP Control
To be sure of proper sanitation, the ORP should always be
above 650 mV. Even if using additional purification systems,
such as ozone, UV systems or metal ion systems, THE ORP
READING MUST ALWAYS BE MAINTAINED ABOVE 650
mV.
Also, it is recommended to check the calibration of the
controller at the same time of the day, preferably in the
morning after a couple of hours of operation, but before full
sun.
Finally, the system operator should become familiar with ORP
technology (see below) and learn to trust the information it
provides rather than less reliable test kits.
pH Control
The importance of proper pH control cannot be emphasized
enough, as it affects every aspect of water chemistry.
When the pH is too low, the water becomes increasingly
corrosive and causes stains or etching of plaster. When the
pH is too high, the efficiency of the sanitizer decreases rapidly
and the water becomes too alkaline - which causes cloudiness,
stains and scaling.
pH control is also affected by Total Alkalinity (TA). If (TA) is
too high, pH response is slow and requires more acid or base
feed. If it is too low, pH control becomes very sensitive.
Because of the Time Lag for mixing of the chemicals in the
water, there is always a fluctuation (0.1 to 0.2 pH units) above
or below the setpoint, depending on the chemical feed rate.
If the pH tends to overshoot the setpoint, the Control Mode
should be set to Proportional. Alternatively, the feed rate of the
acid or soda feed pump can be reduced or a more dilute
solution can be used (especially in a small body of water, like a
spa). DO NOT CHANGE THE SETPOINT.
In an ACID FEED system, if the pH meter consistently reads
too high (not enough acid), the feed rate of the acid feed pump
should be increased, or a stronger solution should be used.
DO NOT CHANGE THE SETPOINT.
If the meter shows too much overshoot, the Control Mode
should be set to Proportional to reduce the feed rate. DO NOT
CHANGE THE SETPOINT.
If the meter consistently reads below the set point, reduce the
width of the Progressive Zone or set the control mode to
ON/OFF to increase the feed rate. DO NOT CHANGE THE
SETPOINT.
The sensor reads ORP (Oxidation-Reduction Potential) which
is closely related to the FAST ACTING FREE CHLORINE
(HOCl), the most effective sanitizer. The DPD and FACTS test
kits - and most other controllers - however read only the
combination of FAST ACTING and SLOW ACTING FREE
CHLORINE (HOCl and OCl-). This is not very meaningful
because the slow acting form of chlorine is about 80 to 100
times slower than HOCl in killing bacteria.
If the ORP reading is maintained above the recommended
minimum of 650 mV, the water should be free of germs and
bacteria. Below 650 mV, germs and bacteria will develop.
ORP readings are closely tied to the concentration of Fast
Acting Free Chlorine (HOCl), which is affected by pH and by
the cyanuric acid level. If the pH and/or cyanuric acid level are
too high, the ORP will be reduced even with high levels of
chlorine.
With stabilized forms of chlorine (dichlor powder or trichlor
tablets), it is important to test the cyanuric acid level in the
water regularly and to bleed or replace part of the water.
If other purification systems are used (ozone, UV or metal
ions systems), it is very important to maintain the proper ORP
level at all times with chlorine or bromine residuals.
NOTE: Never use sequestering agents with ORP sensors as
they will coat the platinum ring and prevent it from reading.
In a SODA FEED system, if the pH meter consistently reads
too low (not enough soda), the feed rate of the soda feed pump
should be increased, or a stronger solution should be used.
DO NOT CHANGE THE SETPOINT.
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MAINTENANCE Page 56
Limit Timers (Overfeed Safety)
The Time Limit settings are designed to automatically disable the feeders or other equipment in the event of equipment failure or
operator error such as:
- sensor or electronics failure,
- chemical feeder malfunction,
- improper valving of the recirculation system,
- manual override of automatic control by untrained or unauthorized personnel,
- depletion of chemical supply.
In normal operation, the chemical feeders are activated only for a short period of time - that is until the chemical level in the water has
returned to the proper value. As soon as the chemical feeder is activated, the safety timer is turned on. Normally, feeding stops before
the time limit is reached. The timer then resets to zero and waits for the next activation cycle.
However, if feeding continues over the preset time, the timer immediately stops the feeder and activates the overfeed alarm. It must
then be reset manually by resetting the limit timer to 0 (see Chapter II) after the cause of the malfunction has been corrected.
Timer Settings
To select the proper setting for each safety timer, the operator must take into consideration the size of the system and the feed rate of
the chemical feeder.
NOTE 1:The chemical feeders should be properly sized for the installation so that they do not have to feed continuously for more than 3
hours - even during peak usage periods.
NOTE 2:Once tripped, the safety timer has to be reset manually by the operator after investigation and correction of the malfunction.
PERIODIC MAINTENANCE
Water Testing
1. Test the water with a reliable and fresh test kit daily or as often as required by the local health department.
2. Adjust the reading of the display if needed.
3. If the PPM or pH readings are out-of-range:
a. Investigate and correct the cause of the problem immediately,
b. Readjust the water manually if needed and recalibrate the displays.
4. If the displays cannot be recalibrated after adjustment of the water chemistry, clean the sensor tips and recalibrate the meters.
5. If the displays still cannot be calibrated, see the TROUBLESHOOTING section.
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Shock Treatment
Even when maintaining the proper chlorine residual level with Chemical Automation, it is recommended to shock or superchlorinate the
water periodically for the following reasons:
1. To prevent algae growth resulting from genetic adaptation of algae species to chlorine, i.e. becoming chlorine resistant.
2. If the chlorine level is allowed to fall below the normal level, even for a short period of time (due to exhaustion of chemicals or technical
malfunction), there can be formation of chloramines, which can be destroyed only by breakpoint superchlorination.
WARNING:
If there is a concentration of chloramines of 0.2 PPM (mg/l) or more, a superchlorination level of 10 times the combined chlorine level is
required.
The shock treatment program can be set up either through the ORP Menu or the SANITIZER Menu, depending on the choice of
chemicals.
The weekly cycle, date and time should be selected based on the particular requirements and utilization schedule of the facility.
Precautions
A. During superchlorination, the Time Limit safety is bypassed.
B. A SHOCK treatment warning is displayed on the Display Screen when activated.
C. The out-of-range alarms stay on as long as the oxidizer or sanitizer levels are above the high limits.
Deshock (Dechlorination)
Following shock treatment, or superchlorination, it may be necessary to reduce the excess chlorine to allow swimming.
This can be done with a reducing agent such as Use Sodium Thiosulfate (Photographer's Hypo) with the Deshock program.
For faster results, it can also be done manually as follows:
Add 4.5oz (130 g) per 10,000 gallons (40 cubic meters) of water for each 1 PPM (mg/l) of chlorine to reduce.
Add half of the required amount first, allow time to react and test the water before adding the rest.
MAKE SURE TO TURN OFF THE CONTROLLER
AND SHUT OFF THE BYPASS LINE WHEN DOING
GENERAL MAINTENANCE.
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Problems Solutions
TROUBLESHOOTING
1. NO DISPLAY. 1a. Check power to system.
2. FAINT OR DARK DISPLAY 2a. Adjust contrast with Display Potentiometer R39 in center of Mother Board.
3. ERRATIC DISPLAY. 3a. Turn Power Switch off for 10 seconds and back on.
4. NO EVENT ACTIVATION 4a. If PUMP Option is not available, set N.A. in Setup/Options submenu.
5. NO CHEMICAL FEED
NO BLEED
1b. Check On/Off Switch on right side of cabinet.
1b. Check Voltage Selector Switch in upper section of Power Board.
Verify proper input voltage 110V or 230V.
1d. Check Fuse F2 on Power Board. If blown, replace with AGC1 fast blow fuse.
3b. Check power cable contacts.
3c. Check power strip connecting Mother Board and Power Board.
3d. Press program and memory chips on Mother Board to assure proper contacts.
4b. If PUMP Option is available, verify that pump is ON.
5a. Check flashing line in Main Display Screen.
Highlight flashing line with UP or DOWN arrow.
Press RIGHT arrow to enter submenu.
Check flashing line in Submenu.
5b. If LOW or HIGH ALARM is flashing:
Adjust water chemistry manually.
Press RIGHT arrow to change alarm limits.
Set Feed Lockout to Off (CAUTION !!!).
5c. If RUN TIME line is flashing:
Increase chemical feeder rate.
Increase Limit Timer setting.
Reset Run Time with AUTO setting.
5d. If BYPASS LINE is flashing on Main Display:
Check water flow in bypass line.
Check Safety Flow Switch in bypass line.
Set Bypass Line to Off in Operations Submenu (CAUTION !!!).
5e. Set Feed Mode to MANUAL.
Feed Indicator on Main Display should turn on.
5f. Check Relay Fuses on Power Board.
ORP Fuses F4 and F5
Sanitizer Fuses F10 and F11
pH Fuses F8 and F9
6. CANNOT CALIBRATE 6a. Check water balance and adjust if needed.
6b. Clean faulty sensor as indicated.
6c. Check sensor connections.
7. CHLORINE OR pH
OVERFEED
8. IMPROPER READINGS 8a. Clean the faulty sensor.
7a. Clean and test the faulty sensor.
7b. Check and adjust the calibration.
7c. Check and adjust the setpoint.
7d. Check the relay.
7e. Check the chemical feeder for leaks.
7f. Reduce feed rate or dilute the solution.
7g. Check the Superchlorination Program.
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PARTS AND ACCESSORIES
ORP ORP SENSOR with 10-ft (3-m) shielded cable and BNC connector.
pH pH SENSOR with 10-ft (3-m) shielded cable and BNC connector.
TEMP TEMPERATURE SENSOR, 1/4" MPT, 10-ft (3-m) cable
C/T TEMPERATURE + CONDUCTIVITY SENSOR with 10-ft (3m) cable.
FS ON/OFF SAFETY FLOW SWITCH, 3/4" FPT, for bypass line.
PSI PRESSURE TRANSDUCER, piezoelectric, 1/4" MPT.
138167 WATER LEVEL SENSOR, electro-optical, 1/4" MPT.
MBCDCN12 MOTHER PC BOARD, electronic PC board for CDCN12 with microprocessor.
MBCDCN13 MOTHER PC BOARD, electronic PC board for CDCN13 with microprocessor.
PBCDCN12 POWER PC BOARD, electronic PC board for CDCN12 with relays (specify).
PBCDCN13 POWER PC BOARD, electronic PC board for CDCN13 with relays (specify).
4-20MA COMMUNICATIONS PC BOARD, 4-20 mA, 5 channels (for CDCN13 only).
FSLYCT FLOW SWITCH LINE ASSY, 3/4"
205T PVC SOLENOID VALVE, 1" or 3/4" FPT (specify 24 V or 110VAC).
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