Avidity Science Duo Series User manual

Duo Range
Ultra-Pure Water System
with Total Organic Carbon Monitoring and
Ultra-Filtration
DUO10 / DUO10-UF / DUO20 / DUO20-UF
Series 4
Operation Manual
OP-000102
Revision B
March 2019

© 2019 Avidity Science, LLC. All rights reserved.
Other brand and product names are trademarks or registered trademarks of their respective holders.
Although Avidity Science, LLC. has taken every precaution when preparing this manual, Avidity Science, LLC
assumes no responsibility for errors or omissions, nor does Avidity Science, LLC assume liability for damages
to your system resulting from the use of the information in this manual.
Information in this document is subject to change without notice and does not represent a commitment on the
part of Avidity Science, LLC.
NORTH AMERICA OFFICE
819 Bakke Avenue
Waterford, WI 53185-5913
833.898.3420
E-mail: US.T[email protected]
www.AvidityScience.com
EUROPE & ASIA OFFICE
Unit D4 Drakes Park
Long Crendon HP189BA
Tel: [phone]
E-mail: UK.T[email protected]

Avidity Science, LLC Duo Range Ultra-Pure Water System Operation Manual
Contents i
Contents
Important Safety and Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
RoHS/WEEE Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Hazard and Special Safety Notice Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Product Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Product Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Contacting Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Duo Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Purification Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Dispense Controller Primary Operation Menus and Sub-menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
User Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
System Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Consumable Timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Alarms (Warnings) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Change Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Configure User Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Dispensing Deionized (DI) Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Dispensing Type 1 Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Warning Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Sanitize the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Replace Pre-Treatment Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Replace Endure Purification Pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Change the RO Membranes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Autoclave Dispense Controller Ultra Filter (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Replace Dispense Controller Standard Filter or Ultra Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Replace Air Filter on External Storage Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Consumables and Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Duo Range Ultra-Pure Water System Operation Manual Avidity Science, LLC
ii Contents
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
External Storage Tank Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Avidity Science, LLC Duo Range Ultra-Pure Water System Operation Manual
Important Safety and Service Information iii
Important Safety and Service Information
The customer should comply with their organization’s Electrical Safe Practices as recommended by the
Occupational Safety and Health Administration (OSHA), or local and national safety codes.
This equipment must be operated by qualified persons who are knowledgeable and trained in its operation,
and its associated hazards.
Use caution when operating, or servicing this equipment. It is the user’s responsibility to read and under-
stand the content of this manual before operating this equipment.
SAVE THESE INSTRUCTIONS
RoHS/WEEE Statement
Avidity Science water treatment, automated watering, environmental monitoring, and access control sys-
tems specified within this manual are manufactured in compliance with the RoHS Directive
(EU Directive 2011/65/EU and subsequent amendments).
Hazard and Special Safety Notice Definitions
Below is a list of definitions of hazard symbols used on this product.
This manual may contain the following types of special notices.
IMPORTANT: Indicates information that is necessary to understanding a topic or performing a procedure.
NOTE: Indicates information that may be helpful in understanding a topic or performing a procedure.
Product Warnings
WARNING! Risk of electrocution or electrical shock resulting in death or severe
personal injury.
WARNING! Could result in death or serious personal injury or equipment dam-
age.
CAUTION! Minor or moderate injury or equipment damage
WARNING! Electrical shock. Install this equipment on a ground fault interrupt-
ing circuit. Not installing this equipment on a ground fault interrupter circuit can
cause electrical shock resulting in severe personal injury or property damage.

Duo Range Ultra-Pure Water System Operation Manual Avidity Science, LLC
iv Important Safety and Service Information
Product Caution
Contacting Technical Support
For up to one year after your system installation date, you may contact Avidity Science for free technical
support. All contact information appears in the tables below.
UK Support
US Support
China Support
WARNING! Electrocution. Never stand in water when handling electrical equip-
ment. Water is a conductor of electricity. Standing in water while operating this
equipment can cause electrical shock or electrocution resulting in severe per-
sonal injury.
WARNING! Electric Shock. Disconnect the main power before servicing any
electrical components. Failure to do so can cause electrical shock resulting in
personal injury.
CAUTION! Equipment damage. Follow all nationally and locally approved elec-
trical codes when installing this equipment. Failure to do so can result in equip-
ment damage.
Phone E-mail Web Site
01844 201142 (Option 2) UK.T[email protected] AvidityScience.com
Phone E-mail Web Site
800 558 5913 [e-mail] AvidityScience.com
Phone E-mail Web Site
(86) 189 1852 9537 CN.TechSu[email protected] AvidityScience.com

Avidity Science, LLC Duo Range Ultra-Pure Water System Operation Manual
Introduction 1
Introduction
The Duo Ultra-Pure Water System provides dual water purification producing both Type 2 and Type 1
water, combined with ultraviolet sanitizing and total organic carbon monitoring. Type 2 water is stored in a
separate tank and is drawn from the tap on the tank. Type 1 water is drawn from a dispense controller
mounted on the Duo unit or an optional Remote Dispenser fitted with an Ultra Filter. The the dispense
controller releases a programmed volume of water.
All recorded data, warning messages and dispensing information are viewed from a display on the dis-
pense controller. All components of the system are installed in a metal chassis and protected by a plastic
housing that allows for the system to be placed on a bench or wall-mounted. The front panel is removable
for access to the consumables.
The system is designed in accordance with the most recent technology and the latest safety regulations. It
is recommended that the system is installed and commissioned by the manufacturer or their designated
representative.
Duo Models
The content of this manual applies to these models..
Table 1. Duo Models
Model
Product Water
Quality
Product Water
Flow Rate Model
Product
Water Quality
Product Water
Flow Rate
Duo 10
with Standard Filter
Type 1 2 liters/minute
[0.53 gal/min] Duo 20
with Standard Filter
Type 1 2 liters/minute
[0.53 gal/min]
Type 2 10 liters/hour
[2.6 gal/hour] Type 2 20 liters/hour
[5.3 gal/hour]
Duo 10-UF
with Ultra Filter
Type 1 2 liters/minute
[0.53 gal/min] Duo 20-UF
with Ultra Filter
Type 1 2 liters/minute
[0.53 gal/min]
Type 2 10 liters/hour
[2.6 gal/hour] Type 2 20 liters/hour
[5.3 gal/hour]

Duo Range Ultra-Pure Water System Operation Manual Avidity Science, LLC.
2Introduction
Purification Process
In normal operation, feed water enters the system through the Inlet Solenoid Valve (V3), engaging the
Reverse Osmosis (RO) Pump (P1). The conductivity of the feed water is measured by the feed water
conductivity sensor (Q1) before it reaches the pump.
The untreated water is pumped through the carbon-based, Pre-Treatment Module (TC001) to detain
larger particles greater that 20 micron and chemicals such as insecticides, pesticides, herbicides and chlo-
rides. The pre-treatment module is essential to protecting the RO membranes and must be replaced at the
stated intervals to retain the integrity of the RO membranes as effectively and efficiently as possible.
From the pre-treatment module, water passes over one or two RO Modules (membranes) (TC013). The
membranes reject almost all bacteria, viruses, heavy metal compounds and organics, as well as 98 percent
of the salt content from the water. A percentage of the rejected water, referred to as the concentrate, is
sent to drain through a Flow Restrictor (R1) while the remaining water passes through the membranes
again, conserving water usage.
The product water, referred to as permeate, is measured through the Permeate Conductivity
Sensor (Q2) as it leaves the membrane. Should the water quality measure within the set limits, the Perme-
ate Solenoid Valve (V5) is opened and the permeate water reaches the next level of purification. Should
the water quality measure outside of the set-limits, the system will display a warning for the user to act
accordingly and the permeate is recycled or flushed to drain as part of the Auto-Flushing feature.
The accepted water is pushed through the Endure Purification Pack 1 (TC002) which contains ion-
exchange resins. The deionization process occurs and the permeate water quality is measured by the Post-
treatment Conductivity Sensor (Q3). The permeate water is fed into a required storage tank (TANK)
where it is held as Type 2 water. The storage tank may be equipped with an Ultraviolet (UV) Light
(TC008) to maintain bacteria sterilization in the stored water. Type 2 water can be dispensed from the tank
through the dispenser tap on the storage tank when required.
Type 1 water is made through a polishing process that begins with the activation of the circulation pump
by either the Dispense Controller or the Remote Dispenser to draw Type 2 water from the storage tank.
The water flow from the tank is monitored by a flow sensor (SENS00004). The polishing process takes
the Type 2 water back into the Duo unit, over the UV light (TC003), where the conductivity and Total
Organic Carbon (TOC) is measured by the Q4 sensor. The water then passes through the Endure Purifi-
cation Pack 2 (TC009) which is filled with a high grade of mixed bed ion-exchange resins which enables
the optimum resistivity of 18.2 MΩ-cm to be reached. The resistivity is verified as it leaves the Type 1
Conductivity sensor (Q5) and the temperature is then verified by the temperature sensor (T1).
If the temperature is outside the set-limits, then the flushing solenoid valve diverts the water to drain. A
warning is displayed on the dispense control display. Flushing will continue until the temperature returns
to its normal-operation setting.
When the user activates the dispenser, the dispense solenoid valve (V8) opens and desired water volume is
dispensed. A standard filter (TC011) can be installed for extra filtration.
On Ultra-Filter (UF) Duo units, an Ultra-Filter (TC004) is installed on the dispenser to add a final point of
filtration to provide water with reduced levels of endotoxins and viruses.

Avidity Science, LLC Duo Range Ultra-Pure Water System Operation Manual
Introduction 3
Figure 1. Duo water purification process.
Table 2. Purification Process component descriptions
Component Description Component Description
V3 Inlet Solenoid Valve SENS00004 Flow Sensor
Q1 Feed Water Conductivity Sensor TC008 Optional Ultraviolet Lamp (inside the storage
tank)
P1 RO Pump TC003 Ultraviolet Lamp (inside the Duo unit)
TC001 Pre-Treatment Module P2 Circulation Pump
TC013 RO Module (membrane) Q4 Conductivity and Total Organic Carbon Sensor
R1 Flow Restrictor TC009 Endure Purification Pack 2
Q2 Permeate Water Conductivity Sensor Q5 Type 1 Water Conductivity Sensor
V5 Permeate Water Solenoid Valve T1 Temperature Sensor (not shown)
TC002 Endure Purification Pack 1 V8 Dispense Solenoid Valve (not shown)
Q3 Post-Treatment Water Conductivity Sensor DISP00001 Dispense Controller
TANK Storage Tank (30 litre, 60 litre, or 100 litre) REMOTE Remote Dispenser
V3
P1
Q1
TC001
TC013
TC013
R1
Q2
V5
TC002
Q3
TC003
Q4
TC009
Q5
Type 1 Water
Dispensing
Feed Water
Drain
Auto-Flushing feature
Inlet
Solenoid
Valve
TANK
P2
REMOTE
OR
DISP00001
SENS00004

Duo Range Ultra-Pure Water System Operation Manual Avidity Science, LLC.
4Introduction
Dispense Controller Primary Operation Menus and Sub-menus
The Dispense Controller function also applies to the Remote Dispenser.
(red)
Access Main menu. View Active Alarms
Main Menu
Remote
Dispenser
Menu
Available only on the primary
dispense controller.
(green)
Turn off the unit.
Access factory
settings.
Password required
Change the current
language Sleep mode.
External storage tank is filling.
Access information
related to the
displayed screen.
Access Main Menu

Avidity Science, LLC Duo Range Ultra-Pure Water System Operation Manual
Operation 5
Operation
The Dispense Controller function also applies to the Remote Dispenser.
User Settings
NOTE: User password 1111 is required to access the user settings.
This is the User Settings screen.
RO Quality Limit. Set the required water quality of the Type 3 water
Tank Full Limit. Set the Full water level for the external storage tank (if applicable)
DI Quality Limit. Post-treatment water conductivity setting
UP Quality Limit. Ultra-pure water conductivity setting
Temperature Limit. Ultra-pure water temperature setting
Flow Calibration. Calibrate the volume of water dispensed
System Settings
Accessible only by qualified technician with a password.

Duo Range Ultra-Pure Water System Operation Manual Avidity Science, LLC
6Operation
Consumable Timers
Displays the number of hours since these components were installed:
•Pretreatment Module TC001
•UV lamp TC003
•Endure Purification Pack 1 TC002
•Endure Purification Pack 2 TC009
Alarms (Warnings)
Displays active alarms. Alarms will automatically display as they occur. Touch the alarm name to display
details.
Touch to acknowledge the alarm. The alarm will stay in the list until the associated issue has been
fixed.
Change Language
Follow this procedure.
1. On or touch , then on , touch
2. Touch the desired language and touch .

Avidity Science, LLC Duo Range Ultra-Pure Water System Operation Manual
Operation 7
Configure User Settings
Follow this procedure.
1. Take one of these actions:
•On or touch
•On , touch , then touch
2. On , touch
3. Enter the User password 1111 and touch
4. Touch the applicable setting and touch .
5. Touch or until the desired value is displayed.
6. Touch
7. Repeat steps 4 through 6 until all applicable user settings are configured.
8. Touch to return to the Dispense home screen.

Duo Range Ultra-Pure Water System Operation Manual Avidity Science, LLC
8Operation
Dispensing Deionized (DI) Water
The permeate water is fed into a storage tank (TANK) where it is held as deionized water. The water is dis-
pensed from a tap or valve on the tank.
Dispensing Type 1 Water
Type 1 (Ultra Pure) water is drawn from the external storage tank using the dispense controller or the
Remote Dispenser. The Dispense menu screen is displayed during normal operation.
The factory settings can be modified by the user as necessary. Below are the tasks required to configure the
Dispense Controller.
NOTE: For Type 1 water, the storage tank may be equipped with an Ultraviolet (UV) Light (TC008) to maintain
bacteria sterilization in the stored water. Section Purification Process on page 2 explans of how Type 2 water is
converted to Type 1 water.
Setting the Dispense Speed
Follow this procedure.
1. On ,select :
2. Touch or until the desired speed is displayed.
3. Touch to return to .

Avidity Science, LLC Duo Range Ultra-Pure Water System Operation Manual
Operation 9
Setting the Dispense Volume and Dispensing Water
Set the required volume of water to release before activating the dispense controller.
Follow this procedure.
1. On ,touch :
2. Touch or until the desired number of litres is displayed.
3. Touch to start dispensing water.
NOTE: The water flow will automatically stop when the programmed volume are dispensed.
Touch to stop the water flow sooner.

Duo Range Ultra-Pure Water System Operation Manual Avidity Science, LLC
10 Operation
Calibrating the Dispense Volume
If the volume of water dispensed does not match the programmed volume, calibration is required.
IMPORTANT: You will need a container that measures in litres and is large enough to hold the required volume
of water.
Follow this procedure.
1. Place a graduated cylinder below the dispense controller.
2. On ,touch :
3. Touch . The programmed volume of water is dispensed.
4. Touch
5. Touch
6. On , touch .
7. On , touch

Avidity Science, LLC Duo Range Ultra-Pure Water System Operation Manual
Operation 11
8. Enter the User password 1111 and touch
9. Touch Flow Calibration and touch .
10.Observe the volume of water in the graduated cylinder and take one of these actions.
If the volume in the
cylinder is... Then,... And then,...
The required volume Touch ---
Less than required,
Touch and empty the container.
Touch to increase the volume of water
dispensed.
Touch .
Repeat steps 1 through 8 until the required vol-
ume is dispensed into the graduated cylinder.
More than required,
Touch to decrease the volume of water
dispensed.
Touch .
Repeat steps 1 through 8 until the required vol-
ume is dispensed into the graduated cylinder.

Duo Range Ultra-Pure Water System Operation Manual Avidity Science, LLC
12 Operation
Warning Messages
Below is a list of warning messages and solutions.
Description Error
Number Solution
Water leak (system shuts down)
60
Fix the leak. Dry the leak sensor located on the bottom of
the cabinet.
Contact Technical Support as necessary.
Permeate a
a. When RO pump is ON
40 Contact Technical Support.
DI Quality Lowb
b. When Permeate is ON
41 Follow on-screen instructions.
Loop Resistivityc
c. When circulation pump is active
42 Follow on-screen instructions.
Loop Temperature 43 Follow on-screen instructions.
Tank Empty 50 Follow on-screen instructions.
Ta n k L o w 51 Follow on-screen instructions.
Permeate Sensor Fault: LOW 64 Follow on-screen instructions.
DI Quality Sensor Fault: LOW 62 Follow on-screen instructions.
Loop Conductivity Sensor Fault 63 Follow on-screen instructions.
Temperature Sensor: HIGH 64 Allow system to flush.
Temperature Sensor: LOW 65 Check incoming water temperature.
Level Sensor Fault: HIGH 67 Contact Technical Support.
Level Sensor Fault: LOW 68 Contact Technical Support.
Internal UV Lamp Run Time Expired 4Contact Technical Support
Tank UV Lamp Run Time Expired 5Contact Technical Support
Pretreatment Module TC001 time expired 1Replace.
Endure Purification Pack 1 TC002 time
expired 2Replace.
Endure Purification Pack 2 TC009 time
expired 3Replace.
Inlet Conductivity: HIGH 24 Check conductivity in Feed Water.
Pressure Sensor Fault: HIGH 69 Contact Technical Support.
Pressure Sensor Fault: LOW 70 Contact Technical Support.
Pressure: HIGH 71 Follow on-screen instructions.
Contact Technical Support.

Avidity Science, LLC Duo Range Ultra-Pure Water System Operation Manual
Routine Maintenance 13
Routine Maintenance
Below is a schedule of routine maintenance intervals required to keep the Duo Ultra-Pure Water System
operating.
Sanitize the System
The Duo system must be sanitized once a year. You will need a new Sanitization cartridge TC010.
1. Remove the left-front panel.
2. On touch
Table 3. Schedule of Routine Maintenance
Maintenance Required Frequency
Preventive maintenance by an Authorized Technician 6 months
Sanitize the system 6 months
Replace Pre-Treatment Module 6 monthsa
a. Recommended frequency depends on usage and applies to the stated model only, without modification.
Replace Endure Purification Pack 1 6 monthsa
Replace Endure Purification Pack 2 6 monthsa
Replace Standard Filter or Ultra Filter 6 monthsa
Replace UV Lamp (Duo unit) 12 months by an Authorized Technician
Replace RO membranes On recommendation of an Authorized Technician
Replace Air Filter on External Storage Tank 12 months
WARNING! Severe personal injury. The sanitization cartridge contains chlorine.
Chlorine causes severe eye and skin irritation or burns. Avoid contact with eyes,
skin, and clothing. Wear protective glasses and gloves during the sanitization
process. Wash hands thoroughly at the completion of the process.

Duo Range Ultra-Pure Water System Operation Manual Avidity Science, LLC
14 Routine Maintenance
3. On touch
4. Enter the User password and touch
5. On , select UP Sanitisation and touch . Sanitizing begins.
6. Remove the packaging from the Sanitization Cartridge.
7. Wearing protective gloves, remove the covers from the receptacles on the Sanitization Cartridge
shown below.