A.O. Smith X4+ User manual

Size: A5 [148.5 mm (W) x 210 mm (H)]
Part No.: 333770-001_R0
Date: 2-03-2018
USER GUIDE
Water Purifier
EXPERT SERVICE
Monday to Friday: 9 a.m. to 8 p.m.
Saturday & Sunday: 9 a.m. to 6 p.m.
#For calls registered at A. O. Smith Call Centre before 4 p.m. only.
Available only in selected cities. For more details, please call our
Customer Care Centre or log on to www.aosmithindia.com
1800-103-2468/ 1860-500-2468
[phone] (WhatsApp) or
[email protected]
With MIN-TECH
(Mineraliser Tecnology)
GREEN
SERIES
A. O. SMITH

Dear Customer,
Congratulations and welcome to A. O. Smith family.
We thank you for the trust you have shown in choosing the A. O. Smith Water Purifier.
A. O. Smith Water Purifier is one of the most advanced RO Water Purifier available in the
market today. It is specially designed keeping in mind today’s water quality and your
needs.
Millions of customers all over the world trust A. O. Smith Products for their quality
and workmanship.
Our customer-centric approach manifests itself in many other ways too. If you need any
information or assistance with your Water Purifier, just call us from any phone,
anywhere in the country to our Customer Care No. 1800-103-2468/1860-500-2468.
Please go through this simple and easy to read instruction and installation manual to
get the best out of your A. O. Smith RO Water Purifier.
We once again thank you for choosing A. O. Smith.
Yours Sincerely,
Team A. O. Smith

Contents
Key Features of your A. O. Smith RO Water Purifier .......................................... 01
Pre-instruction literature .......................................................................................... 02
General instructions ................................................................................................. 03
Introduction ............................................................................................................. 04
Product overview ..................................................................................................... 06
Function of indicators .............................................................................................. 07
Water flow ............................................................................................................... 08
Electrical diagram..................................................................................................... 08
Safety precautions.................................................................................................... 09
How to use............................................................................................................... 10
Draining drip tray..................................................................................................... 11
How to maintain your product................................................................................. 12
Troubleshooting....................................................................................................... 13
Technical specifications ............................................................................................ 17
FAQs......................................................................................................................... 19
Warranty terms and conditions................................................................................ 21
Warranty card .......................................................................................................... 25
Service and maintenance ......................................................................................... 26
Disclaimer ................................................................................................................ 27
What’s in the box?
User Guide Mounting Accessories Tube & ConnectorsWater Purifier
USER GUIDE

ADVANCE PATENTED SSM TECHNOLOGY (SIDE STREAM RO MEMBRANE)
Suitable for water with low and high (upto 2000 ppm) TDS. Wastes less water and
improves pure water recovery.
Key Features of your A. O. Smith RO Water Purifier
ADVANCE ALERT TECHNOLOGY
For RO membrane and Pre + Post RO filters change.
CONVENIENCE
Provision for both wall mounting and table top.
TANK OVERFLOW PROTECTION
Prevents water overflow from the tank.
LARGE STORAGE CAPACITY
Pure water storage capacity of 9 litres.
01
PURITY THROUGH 7 STAGE PURIFICATION
7S TECHNOLOGY: Pre-filter + SCB filter™ (Sediment filter + Carbon block) + ART™
(Advance Recovery Technology™) + Patented Side Stream RO Membrane +
SCM-TECH™ (Silver Activated Post Carbon + MIN-TECH). In A. O. Smith RO
water purifier 100% water passes through the RO membrane.
ART™ (ADVANCE RECOVERY TECHNOLOGY™)
Breakthrough Advance Recovery Technology gives true water recovery > 55%,
while ensuring 100% RO purification.
MIN-TECH (MINERALISER TECHNOLOGY)
The MIN-TECH (Mineraliser Technology) adds essential calcium and magnesium
minerals to the water. This ensures that the water tastes fresh and natural and
has balanced pH – an essential requirement for drinking water.
WQA CERTIFIED RO MEMBRANE
RO membrane element in A. O. Smith RO Water Purifier is tested and certified
by WQA against NSF/ANSI 58 standards for material requirements.
* Patent Applied | TDS: 750 ppm, Water temperature 27°C, Water feed pressure 20 psi.

On Receipt
It is our policy to promote safe delivery of all orders. This product shipment has been
thoroughly checked, packed and quality certified before leaving our plant.
Visible Loss or Damage
If any of the goods called for on the bill of lading or express receipt are damaged or the
quantity is short, do not accept them until the freight or express delivery agent makes an
appropriate notation on your freight bill or receipt.
Concealed Loss or Damage
When a shipment has been delivered to you in apparent good condition, but upon
opening the crate or container, loss or damage has taken place while in transit, inform
the carrier’s agent/A. O. Smith representative immediately.
About this Manual
This manual is a guide to good practice for operating and periodic maintenance of the
A. O. Smith RO Water Purifier.
This does not contain the full servicing procedures necessary for continued successful
operation of this product. The services of A. O. Smith Company Authorised Service
Technician must be employed periodically on the same.
Do not operate before reading manual supplied with this product.
Please follow instructions in this manual to ensure personal safety and proper operation
of this product. A. O. Smith assumes no liability for installation or servicing performed by
any unauthorised personnel. Always install, operate, inspect and maintain this product in
accordance with all applicable standards. Please store this user manual carefully for any
future reference.
Pre-instruction Literature
02

These instructions have been written as a guide for the proper installation and operation
of your A. O. Smith RO Water Purifier. A. O. Smith will not accept any liability where
these instructions have not been followed. However, for your safety and to avoid
damage caused by improper installation, it is recommended that the Water Purifier must
be installed by A. O. Smith Company Authorised Service Technician only.
Before proceeding with the installation instructions:
1. Inspect the A. O. Smith RO Water Purifier and its component parts for possible
damage. DO NOT install or attempt to repair any damaged component parts. If you
detect any damage in your A. O. Smith RO Water Purifier, please contact the
company through Customer Care Centre, details of which are mentioned in this
manual and on the product.
2. Verify that the voltage being supplied corresponds to that which is mentioned in the
A. O. Smith RO Water Purifier manual.
IMPORTANT
Safety
Your safety and the safety of your loved ones is paramount to us. There are several
safety-related messages in this manual, which have been provided during various stages
such as installation, operation and maintenance of your A. O. Smith RO Water
Purifier. These messages point out potential hazards and also educate on how to reduce
any potential risks. Please always read and follow all safety messages as provided in this
manual.
General Instructions
03
This is the safety alert symbol. This symbol alerts you to potential
hazards that can hurt you and others. All safety messages will follow the
safety alert symbol and either the word “DANGER” or “WARNING”.
Indicates an imminently hazardous situation which, if not avoided, will
result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, may
result in minor or moderate injury or property damage.
DANGER
CAUTION
WARNING

Introduction
04
Stage 5 – RO (Reverse Osmosis) membrane
RO membrane contains semi-permeable membrane wherein the water is passed
through the semi-permeable membrane to remove TDS (Total Dissolved Solids) and
heavy metals like mercury, arsenic, lead, chromium, cadmium etc. It also removes
microorganisms like bacteria, virus, protozoa and cysts.
Stage 6 and Stage 7 – SCM-TECH™(Silver Activated Post Carbon and MIN-TECH)
This filter is the combination of Silver Activated Post Carbon and MIN-TECH
(Mineraliser Technology). Silver Activated Post Carbon acts as polisher and enhances
the taste of water. MIN-TECH contains Calcium and Magnesium minerals which helps
to improve the taste and quality of water. It also adds the required essential minerals
back to water and balances the pH of water.
A. O. Smith RO Water Purifier uses one of the latest technologies that is used in
water purification process. A. O. Smith RO Water Purifier works under the principle
of RO (Reverse Osmosis) technology which is found to be one of the most effective
process. In this process, water under pressure is passed through a semi-permeable
membrane. Purified water is collected for drinking in a storage tank and impurities in
the water are flushed to the drain.
Why water purification is important?
Water purification, today is essential due to the presence of harmful contaminants
present in the water supply. Rapid urbanisation and speedy industrial growth have led to
significant pollutants and contaminants being found in the water supply. Below is a list
of some of the harmful contaminants found today in the water supply which if
consumed in excess can be detrimental to human health.
• TDS (Total Dissolved Solids) like Nitrates, Chlorides, Sulphates etc.
• Pesticides and VOC (Volatile Organic Compounds).
• Heavy metals like Mercury, Arsenic, Lead, Chromium, Cadmium etc., imbalanced pH.
• Microorganisms such as pathogenic bacteria, virus, protozoa and cysts.
A. O. Smith RO Water Purifier removes excessive TDS (Total Dissolved Solids) in water
by more than 95%. A. O. Smith RO Water Purifier reduces heavy metals, removes
pathogens and balances the pH value. By this, it ensures you safe and great tasting
water.
A. O. Smith RO Water Purifier has 7 stages of purification system, wherein the water
is passed through the various stages and progressively filtered to get purified water
which is stored in the inbuilt storage tank.
 Stage 1 – Pre-filter
The Pre-filter is used to remove physical contaminants such as dirt, dust, soil
particles, turbidity present in the water. This improves the life of the SCB filterTM.
 Stage 2 and Stage 3 – SCB filterTM (Sediment and Carbon Block)
This is a dual filter (Sediment and Carbon Block) where Sediment filter first removes
fine and coarse physical contaminants present in the water. Then water is passed
through Carbon Block, which reduces harmful chemicals like pesticides, volatile
organic compounds, residual chlorine etc. It also adsorbs bad taste and odour
causing organic compounds from water.
 Stage 4 – ARTTM (Advance Recovery Technology)
The ART is scale control media which conditions the water to reduce scaling
potential in water.
How does A. O. Smith RO Water Purifier work?

Figure 1
Note: The Pre-filter and the Ball Valve comes along with the product as standard accessories.
05
Stage 5 – RO (Reverse Osmosis) membrane
RO membrane contains semi-permeable membrane wherein the water is passed
through the semi-permeable membrane to remove TDS (Total Dissolved Solids) and
heavy metals like mercury, arsenic, lead, chromium, cadmium etc. It also removes
microorganisms like bacteria, virus, protozoa and cysts.
Stage 6 and Stage 7 – SCM-TECH™(Silver Activated Post Carbon and MIN-TECH)
This filter is the combination of Silver Activated Post Carbon and MIN-TECH
(Mineraliser Technology). Silver Activated Post Carbon acts as polisher and enhances
the taste of water. MIN-TECH contains Calcium and Magnesium minerals which helps
to improve the taste and quality of water. It also adds the required essential minerals
back to water and balances the pH of water.
Pre-filter
Ball
valve

Product Overview
Figure 2
Rear
Cover
Overflow
water
R
Feed water
inlet
Reject
water
Back View
IO
Front View
Drip Tray
Cover
Faucet
Lever
Water
Level
Indicator
Display Panel
Indicators
Top
Cover
Main
Body
Removable
Drip Tray
06

07
Function of indicators
Figure 3
Filter change indicator
This indicates that the RO membrane and other filters needs to be replaced.
• Filter change indicator blinks when 10% life is remaining, indicating that it is time to
replace RO membrane and other filters.
• When RO membrane and other filters life reaches its end, this indicator will blink.
The unit will not function until RO membrane and other filters are replaced.
• Filter change indicator keeps blinking every time the system is switched ON. The unit
will not function until RO membrane and other filters are replaced.
This indicates, that the system is switch ON/OFF condition.
• When the power LED is blinking check feed water supply to the purifier
Note: Call A. O. Smith Customer Care Centre if you notice continuous blinking of Power light.
Power indicator
Note: Call A. O. Smith Customer Care Centre to replace the RO membrane and/or Pre and post
RO filters.
Pre-filter might need to be changed befor indication based on the water quality.

08
Figure 4
Figure 5
Water flow
Electrical diagram
Low Pressure
Switch
Pump
SMPS
Inlet SV
Flush SV
Upper
Level
Sensor
Lower
Level
Sensor
Display
PCB
150V - 300V
50 Hz
1- φAC supply
P
N
Driver Board
24V DC
GND
Low
Pressure
Switch
Pump RO
Tap
water Pre-filter SCB filterTM ARTTM
Ball
Valve
Inlet water
3-way joint
Inlet
Solenoid
valve
Faucet
Overflow
Water Level 1
Sensor
Level 2
Sensor
Storage
Tank
Check
Valve
Pure
Water
SCM-TECHTM
Flow
Restrictor
Flush
Solenoid
valve
Waste
water

09
Safety Precautions
Electrical safety
Do not pull out or touch power plug with
wet hands to avoid electrical shock.
(Figure 7)
Power plug must be used with a
grounded 230V outlet. It is recommended
to connect the product to the power
supply only with the plug that is provided
with the purifier. (Figure 6)
Figure 7
Even though this product is designed keeping highest safety standards in mind, there are
certain Do’s and Dont’s which need to be followed while using this product.
Figure 8
Install the product away from direct
sunlight. (Figure 8)
DANGER
Figure 6
230V
CAUTION
Figure 9
Make sure that the feed water is tested
before installation. Do not install the
product if the TDS and Hardness are more
than that prescribed in the recommended
feed water conditions (Refer page 21).
(Figure 9)
TDS
METER
Note: It is recommended not to switch off the Water Purifier and/or turn off the water
supply to the product when it has not been used for more than 24 hrs. The purifier
has an in-built cleaning mechanism which cleans the RO membrane every 24 hrs by
flushing it. This feature protects the RO membrane and ensures longer life.

10
Product should be installed only by
A. O. Smith Company Authorised Service
Technician. Do not open the purifier for
cleaning the filters or for any part
replacements. This must be done only by
A. O. Smith Company’s Authorised Service
Technician. (Figure 11)
CAUTION
Figure 10
Do not connect hot water to the product.
(Figure 10)
Figure 11
When it is used
Figure 12 Figure 13
Do not put heavy objects on the product.
(Figure 12)
Do not put foreign objects or hand inside
the purifier. (Caution is needed, especially
for children). (Figure 13)
CAUTION
Heater
CAUTION

11
1. Turn ON the water connection
through the ball valve. (Figure 14)
How to use
Figure 14
3. To dispense water from the storage
tank, push and hold the water faucet
lever. (Figure 16)
Figure 16
4. To dispense water continuously, lift
up the water faucet lever for the
continuous water flow. To stop the
waterflow, pull down the water faucet
lever. (Figure 17)
Figure 17
Figure 15
Note:
• Discard the first cycle of pure water, before you start using it for consumption.
• Make sure to discard the water in the storage tank if you have not used the purifier
for more than 2 days.
2. Switch ON the power supply and press
the power button of the purifier.
(Figure 15)
ON

12
Draining Drip Tray
Figure 18 Figure 19
1. Remove the Drip Tray assembly by
pulling forward. (Figure 18)
Figure 20
3. Clean the surface of water tray with a
soft cloth. (Figure 20)
We have provided removable Drip Tray with the product. In case there is slippage of
water, it gets collected in Drip Tray.
2. Remove Drip Tray cover by pulling
upward and then drain completely.
(Figure 19)
Figure 21
4. Re-attach the Drip Tray assembly into
the purifier. (Figure 21)

13
How to maintain your product
Replace filters regularly according to the
replacement indications. This must be
done only by A. O. Smith Company
Authorised Service Technician. (Figure 23)
Figure 22 Figure 23
Do not splash water directly or clean with
benzene, pesticides, thinner, alcohol, etc.,
but use a soft, dry cloth to clean the
purifier. (Figure 22)
Figure 24
Use A. O. Smith genuine accessories only,
for optimal performance of the purifier.
(Figure 24)
Benzene
RO
RO

14
Troubleshooting
Your A. O. Smith RO Water Purifier may not function at its desired capability if used
incorrectly. This may not necessarily mean that the product is faulty. For instances like
these, please follow the steps given below to troubleshoot the problem without help
from a certified technician. If the problem still persists, please call Customer Care Centre
immediately.
Problems Check-up Solution
Change in water taste. Has the purified water Drain the stored water
been stored in the tank from the storage tank
for a long time? through faucet.
RO membrane/filters may Call Customer Care Centre
require replacement. for RO membrane/filters
replacement.
Has the raw water quality Call Customer Care Centre.
changed?
Check if there is no water Switch OFF the Water
flow through reject line. Purifier and call Customer
Care Centre.
Decreased flow of Check whether the Open the tap/ball valve.
purified water. tap/ball valve is closed.
RO membrane/filters may Call Customer Care Centre
be clogged or damaged. for RO membrane/filters
replacement.
Less/No reject water. Check if the reject water Clear the bent in the
tube is bent. reject water tube.
Check if the reject water Switch OFF the Water
tube is blocked. Purifier and call Customer
Care Centre.
Less/No purified water. Check whether there is If not, take the help of a
water supply in the tap. plumber to set it right.
Check whether tap/ball Open the tap/ball valve.
valve is closed.
Check if Filter change LED Call Customer Care Centre
(Red colour) is blinking. for RO membrane and
other filters replacement.
None of the above. Call Customer Care Centre.

15
Power LED blinks . Low pressure alarm is Check feed water supply to
5 times triggered indicating that the purifier. If problem still
the system input water persists, switch OFF the
pressure is not in the water purifier and call
required range Customer Care Centre.
Power LED blinks 3 times Level sensor error. Switch OFF the water
Purifier and call Customer
Care Centre.
Power and Filter change Battery error. Switch OFF the water
LED both blinks Purifier and call Customer
continuously. Care Centre.
Filter change LED blinks RO membrane and other Call Customer Care Centre
and unit is functioning. filters life is about to end. for RO membrane and
other filters replacement.

16
Filter change LED blinks RO membrane and other Call Customer Care Centre
and unit is not functioning. filters life ends. for RO membrane and
other filters replacement.