Culligan Aquasential Tankless RO User manual

DCO# 220303 12/23/22
CAT# 01044539 Rev A
© 2022 Culligan International Company
Aquasential™
Tankless RO
Models from 2023

Analytical
Laboratory
Services
Water Testing Made Easy.
Culligan’s Analytical Laboratory provides its customers with quality water analysis using EPA approved methods. Our Analytical
Laboratory is certied by the State of Illinois EPA, to be compliant with the National Environmental Laboratory Accreditation
Conference (NELAC) standards. In addition to Illinois chemical certication, our Analytical Laboratory is certied to perform
coliform and E. coli testing.
We strive to provide our customers with the testing they need at the lowest possible cost with the quickest turn-around time.
STANDARD
WATER TESTING
For sizing systems and
general chemical water
characteristics.
WELL
WATER TESTING
•Basic •Realtor
•Drilling Surveilance
•Expanded
•Gold
SPECIAL
WATER TESTING
•Hemodialysis •Scale
•Resin •Organic
•Microbiology
•Membrane
Contact your local Culligan Dealer today to
make sure your water is it’s best it can be.
1-877-889-8195
E-mail: Water[email protected]
www.culligan.com
2

About This Manual�������������������������������������������������������������������������������������������������������������������������������4
Attention Culligan Customer:���������������������������������������������������������������������������������������������������������������5
Thank You!�������������������������������������������������������������������������������������������������������������������������������������������6
Specications ��������������������������������������������������������������������������������������������������������������������������������������7
Application & Operation�����������������������������������������������������������������������������������������������������������������������8
Navigation��������������������������������������������������������������������������������������������������������������������������������������������9
Things to Check Before You Call For Service �����������������������������������������������������������������������������������11
Care & Cleaning ��������������������������������������������������������������������������������������������������������������������������������12
Performance Data Sheets �����������������������������������������������������������������������������������������������������������������13
Records & Data ���������������������������������������������������������������������������������������������������������������������������������14
Culligan Limited Warranty �����������������������������������������������������������������������������������������������������������������15
301044539 A 12/22
Table of Contents

401044539 A 12/22
About This Manual
This manual:
• Familiarizes the operator with the equipment
• Explains installation and setup procedures
• Provides basic programming information
• Explains the various modes of operation
• Gives specifications and troubleshooting information
Read this Manual First
Before you operate the Culligan unit, read this manual to become familiar with the device and its capabilities�
Installation or maintenance done on this system by an untrained service person can cause major damage to equipment
or property damage� Not adhering to the recommended service/maintenance can cause damage to equipment or
property damage�
Safety Instructions and Safety Definitions
Note
NOTE! “Note!” is used to emphasize installation, operation or maintenance
information which is important, but does not present any hazard.
Caution
CAUTION!
“Caution” is used when failure to follow directions could result in damage to equipment or property.
Warning
WARNING!
“Warning” is used to indicate a hazard which could cause injury or death if ignored.
The CAUTION and WARNING paragraphs are not meant to cover all possible conditions and situations that may occur�
It must be understood that common sense, caution, and careful attention are conditions which cannot be built into the
equipment� These MUST be supplied by the personnel installing, operating, or maintaining the system�
NOTE! Be sure to check and follow the applicable plumbing codes and ordinances when installing this equipment.
WARNING! Use protective clothing and proper face or eye protection equipment when handling chemicals
or power tools.

We encourage Culligan users to learn about Culligan products, but we believe that product knowledge is best obtained by
consulting with your Culligan dealer� Untrained individuals who use this manual assume the risk of any resulting property
damage or personal injury�
WARNING!
Electrical shock hazard! Prior to servicing equipment, disconnect power supply to
prevent electrical shock.
WARNING!
If incorrectly installed, operated, or maintained, this product can cause severe injury.
Those who install, operate, or maintain this product should be trained in its proper use,
warned of its dangers, and should read the entire manual before attempting to install,
operate, or maintain this product. Failure to comply with any warning or caution that
results in any damage will void the warranty.
CAUTION!
This system is to be supplied with cold water only.
CAUTION!
This product is not to be used by children or persons with reduced physical, sensory
or mental capabilities, or lack of experience or knowledge, unless they have been given
supervision or instruction. Children should be instructed not to play with this appliance.
CAUTION!
If the power cord from the power supply to the unit looks or becomes damaged, the
cord and power supply should be replaced by a Culligan Service Agent or similarly
qualified person in order to avoid a hazard.
CAUTION!
To reduce the risk of fire, use only No. 26 AWG or larger telecommunications line cord.
NOTE! This system is not intended for use with water that is microbiologically unsafe or
of unknown quality without adequate disinfection either before or after the system.
Check with your public works department for applicable local plumbing and sanitation
codes. Follow local codes if they differ from the standards used in this manual. To
ensure proper and efficient operation of this Culligan product to your full satisfaction,
carefully follow the instructions in this manual.
Products manufactured and marketed by Culligan International Company (Culligan) and its affiliates are protected by
patents issued or pending in the United States and other countries� Culligan reserves the right to change the specifications
referred to in this literature at any time without prior notice� Culligan, Aqua-Sensor, Tripl-Hull, and SoftMinder are trademarks
of Culligan International Company or its affiliates�
Culligan International Company
9399 West Higgins Road, Suite 1100
Rosemont, Illinois 60018
1-847-430-2800
www�culligan�com
501044539 A 12/22
Attention Culligan Customer:

Welcome To Your New World of Better Living with Culligan Water.
Congratulations on selecting the Aquasential® Tankless RO Advanced Drinking Water System� With Culligan’s many years
of knowledge and experience in water treatment, you can be confident that the model you selected has been designed and
engineered to provide years of service with a minimum of care and attention�
If this is your first experience having filtered, conditioned water in your home, you’ll love the amazing difference it makes�
We promise that you’ll never want to be without it again�
The Culligan® Aquasential® Tankless RO Advanced Drinking Water System is designed to meet the needs of applications
for high quality water� This manual contains important information about the units, including information needed for operating
and maintenance procedures�
This manual is based on information available at the time it was finalized, approved, and published� Continuing design
refinement could cause changes that may not be included in this publication�
Your local independently operated Culligan dealer employs trained service and maintenance personnel who are experienced
in the installation, function and repair of Culligan equipment� This publication is written specifically for these individuals and
is intended for their use�
The Aquasential® Tankless RO Advanced Drinking Water Systems utilize a high capacity reverse osmosis membrane which
uses a tightly woven membrane that acts as a barrier to substances� Water is pushed up against this membrane at pressure�
Depending on the weave of the membrane only a certain percentage of substances can pass through� These systems’ high
capacity membrane can reduce more than 80% of substances�
The Aquasential™ Tankless RO and Aquasential Tankless RO with Mineral Boost + have been
tested and certified by WQA against NSF/ANSI 372, CSA B483�1 and NSF/NSF 58 for the reduction
of TDS as verified and substantiated by test data�
For installations in Massachusetts, the Massachusetts Plumbing Code 248 CMR shall be
adhered to. Consult your licensed plumber for installation of this system. This system
and its installation must comply with state and local regulations. The use of saddle
valves is not permitted.
601044539 A 12/22
Thank You!

Influent Water Characteristics
Pressure 40-120 psi
Temperature 33° - 100° F
Total Dissolved Solids (TDS)¹ 0-1000 ppm
(0-1000 mg/L)
pH 5 - 10
Chlorine 0-3 ppm (0-3 mg/L)
Chloramine 0-3 ppm (0-3 mg/L)
Turbidity 0-10 NTU
Hardness² 0-10 gpg
Iron 0-1 ppm (0-1 mg/L)
Bacterial Quality Potable
¹ Rating at 50 psi, 77°F, 500 mg/L TDS influent, without storage tank�
² A softener is strongly recommended for water over 10 gpg hard� Installing a system without a
softener on water with hardness higher than 10 gpg will reduce the life of the membrane�
Filter Performance
Filter Cartridge Capacity
CF composite filter cartridge 1 year or 4,755 gallons
RO reverse osmosis filter cartridge 600 gpd
CB carbon block filter cartridge 1 year or 4,755 gallons
MB+ mineral boost+ filter cartridge 1 year or 4,755 gallons
Product Specifications
Tankless RO
Length x Width x Height 18�7 in x 5�7 in x 17�2 in
Power Specifications Input: 120 VAC /
Output: 24 VDC
Rated System Operating Pressure 15 - 120 psi
Inlet Water Temperature 41° - 100° F
Min� Product Flow Rate* 0�42 gpm
Rated Daily Production Rate 715 gpd
Recovery Rating 58�4%
*Depending on local water quality and use environment, the actual
filtered water flow rate and total filtered water volume will vary�
Recovery rating means the percentage of the influent water to the membrane portion of the system that is available to the user
as RO treated water when the system is operated without a storage tank or when the storage tank is bypassed� The system’s
recovery rating has been verified with test data�
Daily production rate: 715 gpd�
701044539 A 12/22
Specifications

The performance of the Aquasential® Tankless RO Advanced Drinking Water System can be characterized and judged by
the quality and quantity of the water produced by the systems� By measuring the contaminant removal performance and flow
rates of the system, its operating status can be easily evaluated�
Factors Which Affect Performance
Performance of the reverse osmosis membrane is affected by several factors which must be considered when judging the
condition of the system� The main factors which affect system performance are pressure, temperature, total dissolved solids
level, recovery and pH�
Pressure
Water pressure affects both the quantity and quality of the water produced by the RO membrane�
Be careful not to exceed 120 psi, the maximum operating pressure of the system�
Total Dissolved Solids
The minimum driving force which is necessary to stop or reverse the natural osmosis process is termed osmotic pressure�
As the total dissolved solids level of the feed water increases, the amount of osmotic pressure increases and acts as back
pressure against the reverse osmosis process� Osmotic pressure becomes significant at TDS levels above 500 mg/L (ppm)�
Hardness
Hardness is the most common membrane foulant� If ignored, this relatively harmless component of feed water will plug a
membrane over time� Use of a softener will reduce the fouling effect on a membrane� One way to detect too much hardness
in the feed water is the weight of a membrane installed for a period of time� A fouled membrane (dried) will weigh significantly
more than a new membrane� The increase in weight is a result of precipitated hardness inside the membrane�
Iron
Iron is another common membrane foulant� There are a variety of types of iron, some of which cannot be removed by
an iron filter� Clear water iron can be removed more effectively by a softener� Particulate iron can be removed more
effectively by a 1 micron filter� Organic-bound iron can be removed only by activated carbon or macro-porous anion resin�
If there is enough iron to exceed the EPA secondary drinking water standard and softening the water is not an option and
the iron is soluble, then an iron filter is appropriate� If none of these are an option then regular replacement of membranes
will have to be accepted�
Product Water Recovery
Product water recovery plays an important role in determining membrane and system performance� Recovery refers
to the amount of water produced in relation to the amount of water sent to drain�
The standard calculation is:
% Recovery = Product Water ÷ (Product Water + Waste Water) x 100
801044539 A 12/22
Application & Operation

Lights and Indicators
Front Cover Indicator
Figure 1� Front Cover Indicator Lights
Table 1� Color Descriptions
The inlet water quality indicators and corresponding filtered water quality points
displays the quality of the water by the color of the lights on the front cover�
Color Water Quality
Blue Excellent
Orange Normal
Red Poor
Table 2� Digital display area description�
Real-time TDS monitoring of filtered product water
Device malfunction codes�
The device is in Flush mode
Table 3� Malfunction indicator description�
Indicator Status Meaning
Solid Blue Normal Operation
Blinking Blue Insufficient Water
Solid Orange Frequent start and stop protection
Blinking Orange Continuous work timeout protection
Blinking Red Water leak
Malfunction indicator
Filtered water
quality indicator
Value display zone
Inlet water quality
indicator
901044539 A 12/22
Navigation

Faucet Display
Figure 2� Filtered Water Indicator
Figure 3� LED Indicator Chart
ALERT
TDS
50 - 74%25 - 49%
11-24%10%0%
75 - 100%
Description
LED
Indicators
Filter life remaining between 75%-100% in gallons or days
Filter life remaining between 50%-74% in gallons or days
Filter life remaining between 25%-49% in gallons or days
Filter life remaining between 11%-24% in gallons or days
Filter life remaining between 0%-10% in gallons or days
0% filter life remaining; Replace filter now
TDS rejection >75%
TDS rejection <75%; Check RO membrane
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