1. COOLING WATER TREATMENT CONTROLLER
IWAKI CO.,LTD

2. OUTLOOK OF W600 CONTROLLER
Check the real time condition
Sending CSV data file
Alarm
Alarm with CSV data file
WCT600
Customer
Operation data
Water Treatment company
Alarm Information
Remote Access
Access for check the real time condition
with data and graph
for manual download data
for change of set point
for remote relay control
Power AC V
Smart phone
WIFI Rooter
Service stuff
Data download
USB
VARIATION OF SENSOR INPUT 1 2 3 4
DIGITAL INPUT
6 Inputs with
Dry contact
Pulse <10Hz for contacting
head Flow meter
Pulse <120Hz for Flow meter
　　　　(Puddle Wheel)
RELAY OUTPUT
6 Relays with
Dry contact relay
Powered relay
Optical relay for proportional
control
ANALOG OUTPUT
2 Outputs
Any of Sensor and
analog inpiut
SENSOR INPUT
One of
Conductivity pH
ORP
SENSOR INPUT
One of
Conductivity pH
ORP
ANALOG INPUT
2 channels in
Any 4-20mA
SENSOR INPUT
One of
Conductivity pH
ORP
SENSOR INPUT
One of
Conductivity pH
ORP
ANALOG INPUT
2 channels in
4-20mA
ANALOG INPUT
2 channels in
Any 4-20mA
SENSOR INPUT
One of
Conductivity pH
ORP
ANALOG INPUT
1 channels in
4-20mA
COMBINATION CARD

3. W600 CONTROLLER COOLING TOWER APPLICATION (1)
Flow switch
(D1)
COOLING TOWER APPLICATION (1)
Conductivity for Automatic Bleed control
Little Dipper2 for Automatic Corrosion Inhibitor dosing control
Alarm(R4)
Power AC100V
Makeup Water Meter(D4 )
( < 10Hz or 500Hz)
Makeup water
Sensor Input
USB
Data download
Analog Input
COOLING TOWER
Control by Conductivity
Bleed Water Meter (D5 )
(< 10Hz or 500Hz)
ON-OFF Control
By Little Dipper2
Measurement
Auto Bleed
Solenoid Valve
(R1)AC100V
Conductivity
sensor
Little Dipper
Bio-timer
Control
Level switch (D2)
(R2)AC100V
(R3)AC100V
Level switch (D3)
Corrosion
Inhibitor
Biocide
CHILLER
Circulating pump
Corrosion Inhibitor
Biocide

4. Wasted Chemical consumption
Timer Control
Chemical (ppm)
160
Wasted Chemical consumption
140
120
Maintain level
100
Conventional Timer feed 80
Need to adjust the dosing rate manually
according to Cooling water concentration
factor 60
Causes Corrosion & scaling risk
Operation Time (hours)
Little Dipper2
Control
Chemical (ppm)
160
140
Save at least 20-30% of Chemical usage
VS. conventional Timer feed control
120
OFF ON
Dosing pump
Maintain level
100
Reduce Corrosion risk (Shut-down etc.,)
Which means reduce TCO (Total Cost
of Operation) 80
Chemical maintained level is kept all the
time even Cooling water concentration
factor was changed 60
Operation Time (hours)

5. W600 CONTROLLER COOLING TOWER APPLICATION (2)
Conductivity for Automatic Bleed control
Little Dipper 2 for Automatic Corrosion Inhibitor dosing control
pH for Automatic Cooling water pH adjustment
Flow switch
(D1)
Alarm(R6)
Power AC100V
Makeup Water Meter(D5 )
( 100L/pulse)
Makeup water
Sensor Input
USB
Data download
Analog Input
COOLING TOWER
Control by Conductivity
Bleed Water Meter (D6 )
(100L/pulse)
ON-OFF Control
By Little Dipper2
Measurement
Conductivity
sensor
Auto Bleed
Solenoid Valve
(R1)AC100V pH
sensor
Little dipper
Level switch (D3)
Bio-timer
Control
(R5) Relay
pH measurement
Level switch (D2)
(R4)Relay
Level switch (D4)
(R3) Relay
Acid
Corrosion
Inhibitor
Biocide
CHILLER
Circulating pump
Acid
Corrosion Inhibitor
Biocide

6. W600 CONTROLLER COOLING TOWER APPLICATION (3)
Conductivity for Automatic Bleed control
LittleDipper2 for Automatic Corrosion Inhibitor dosing control
ORP for Oxidizing Biocide monitoring & Automatic control
Flow switch
(D1)
Alarm(R4)
Power AC100V
Makeup Water Meter(D4 )
(< 10Hz or 500Hz)
Analog Input
Makeup water
USB
Sensor Input
Data download
COOLING TOWER
Control by Conductivity
Bleed Water Meter (D5 )
(< 10Hz or 500Hz)
ON-OFF Control
By LittleDipper2
Auto Bleed
Solenoid Valve
ORP sensor
(R1)AC100V
Conductivity
sensor
LittleDipper
ORP control
Or Timer control
Level switch (D2)
(R2)AC100V
Level switch (D3)
(R3)AC100V
Corrosion
Inhibitor
Biocide
CHILLER
Circulating pump
Corrosion Inhibitor
Oxidizing Biocide

7. ORP MONITORING FOR HALOGEN BIO-TIMER DOSING
Check ORP peak level and confirm Hypo dose rate and timer setting
are good enough
Cooling system is quite clean
Time up
Dosing pump air gap
or system is contaminated
Hypo dosing
start
Additional dose was set in the evening

8. SPIKING CHLORINATION FOR SYSTEM CLEANING
Once a week or 2 weeks
Chlorination Error
Regular Chlorination

9. TYPICAL INSTALATION FOR COOLING WATER TREATMENT

11. W600 CONTROLLER WALL PANEL & DOSING SKID
Conductivity
W600
Flow switch
Cooling Water
Return
ORP
Power panel
Cooling Water
Inlet
Little Dipper2
POWER AC V
Level switch
Level switch
Chemical dosing
pump
Corrosion Inhibitor
Biocide