A.O. Smith EWS 1 User manual

Size: 210mm (H) x 148mm (W)
Part No.: 323976-000_R3
Approved on: 10-05-2013
User Guide
* Conditions Apply
Water Heater
EWS 1 & 3 Litres
EWS 3 Litres
Fit it &
Forget it
Guaranteed* A. O. Smith
Service within 24 hours.
Call: 1.800.103.2468
EWS 1 Product Design: REGD/237701
EWS 3 Product Design: REGD/237702
EXPERT SERVICE
Why people prefer an A. O. Smith water heater...
Instant water heater with
Glass Coated Heating
Element.
INNOVATIVE
SUPERIOR QUALITY
Get the best quality that
ensures you have a water
heater that works in
Indian water conditions.
Heating technology that
will always give you hot
water… Guaranteed!
RELIABILITY

Congratulations!
And welcome to the A. O. Smith family.
We would like to thank you for the trust you have shown in choosing an A. O. Smith water
heater. You can be sure it will live up to your expectations. Thousands of delighted users all over
the world trust A. O. Smith water heaters for their families. This user guide will introduce you
to your water heater. Follow the instructions carefully and look forward to enjoying long years
of trouble-free service.
A. O. Smith is a company known for its innovative technologies and energy-efficient solutions.
®
Ours are the only water heaters with the Blue Diamond Glass lining for the inner container of
the storage water heater. This cutting edge technology prevents sediment and scaling, fights
corrosion and extends the life of your water heater.
Our customer-centric approach manifests itself in many other ways too. If you need any
information or assistance with your water heater, just call us from any phone, anywhere in the
country to our Toll Free Customer Care No. 1.800.103.2468.
Or
Factory Address:
A. O. Smith India Water Heating Private Limited
Plot No. 300, Phase-2, KIADB Industrial Area, Harohalli, Kanakapura Taluk,
Ramanagara District - 562 112, Karnataka, India.
About A. O. Smith
A. O. Smith India Water Heating Private Limited was established in 2006. Since then, the
A. O. Smith team has conducted numerous focus group studies and spent endless research
hours determining what India wanted in a water heater. Backed by 75 years of proven
technological advances, A. O. Smith India has created a stylish design with features demanded
by the Indian consumer.
The A. O. Smith plant with manufacturing facilities spread over 76,000 sq.ft. is located on
20 acres, just outside Bengaluru, in the KIADB Industrial Area, Harohalli. The India operations
th
is the 16 A. O. Smith manufacturing facility worldwide. A. O. Smith's India plant has extensive
engineering and technical resources and has the latest technologies incorporated. A. O. Smith
is the first manufacturer to invest in and produce glass lined water heaters in India.
Today, A. O. Smith Corporation is one of the largest water heater manufacturers in the world
and is a global leader in innovative technology and energy efficient solutions.

What's in the box?
Electric
Water Heater
User Guide Wall Mounting
Accessories
Contents
Specifications..............................................................................................1
Key features ................................................................................................2
Installation ..................................................................................................3
Operation instruction.................................................................................5
Troubleshooting..........................................................................................6
Circuit Diagram...........................................................................................6
Warranty .....................................................................................................7
Jurisdiction..................................................................................................8
Warranty Card.............................................................................................9
Service and Maintenance ...........................................................................10
User Guide
* Conditions Apply
Water Heater
EWS 1 & 3 Litres
EWS 3 Litres
Fit it &
F
orget it
Guaranteed* A. O. Smith
Service within 24 hours.
Call: 1.800.103.2468
EWS 1 Product Design: REGD/237701
EWS 3 Product Design: REGD/237702
EXPERT SERVICE
Why people prefer an A. O. Smith water heater...
Instant water heater with
Glass Coated Heating
Element.
INNOVATIVE
SUPERIOR QUALITY
Get the best quality that
ensures you have a water
heater that works in
Indian water conditions.
Heating technology that
will always give you hot
water… Guaranteed!
RELIABILITY

Caution: *Safety valve has been factory fit with the water heater and set at 0.8 MPa
(8 Bar) rated pressure.
Warning: Do not tamper or detach the safety valve from the water heater.
Specifications
Model EWS 3 EWS 1
Volume [litres] 3 1
No. of Element One One
Power [kW] 3/4.5 3/4.5
Voltage/Frequency [V/Hz] ~230/50 ~230/50
Temperature range [°C] 25-75 25-75
Working Pressure [Bar] 6.5 6.5
Inlet/Outlet connections [Inch] ½ ½
Tank Warranty [Year] 5 5
1
Dimensions
Model EWS 3 EWS 1
A [mm] 245 215
B1 [mm] 348 306
B2 [mm] 384 346
C [mm] 197 167
Part Descriptors
1 Outlet
2 Inlet
3 Safety Valve
4 Thermostat
5 Thermal - Cutout
6 Front Casing
7 Back Casing
8 Heating Element
9 Inner Container
10 Green Lamp Indicator
11 Red Lamp Indicator
12 Reset Button
EWS 3 Litre EWS 1 Litre
4
8
9
5
7
12
6
C
10
3
11
B1
21
A
B2
12
9
8
45
7
6
C
10
3
11
B1
21
A
B2

2
Key Features
The container has a high pressure withstanding capacity of 95 psi (6.5 bar
equivalent to 65 metres water head), which makes it suitable for high-rise
buildings.
Superior quality ABS outer body prevents rusting. The elegantly styled water
heater matches kitchen and bathroom décor.
This Instant Water Heater gives you a 3 year* warranty on the Glass Coated
Heating Element.
Scale and sediment build-up on the surface of the element can lead to
premature failure. A. O. Smith Glass Coating helps to prevent scale formation
and extends the life of the heating element.
It has a superior Thermostat. In case a fault occurs and the water temperature
exceeds the preset temperature, the Thermal Cutout cuts off the power supply
to assure safety.
The Inner Container is highly dependable, it comes with a 5 year replacement
warranty.
Glass Coated Heating Element
High-rated Pressure
6.5
BAR
Hi-tech Thermostat & Cutout
Rust-proof Outer Body
3 year Warranty on Heating Element
5 year replacement Warranty on Inner Container
*The heating element has a 2 year warranty that can be extended to 3 years if registered within the first two months of purchase.
3
YEAR
WARRANTY
5
YEAR
REPLACEMENT
WARRANTY

Installation
Mounting
1. Make sure that the wall can withstand at least twice the weight of water heater when
completely filled with water.
2. Use a drill bit with diameter of 6mm to drill 3 holes at least 35mm deep in the wall, as
shown in the above diagram.
3. Insert the expansion anchors into the holes, tighten the screws providing sufficient gap for
mounting the water heater.
4. Hang the water heater using the 3 screws on the wall and ensure the water heater is fixed
steadily.
EWS 3 Litre
54.5 mm
116 mm
EWS 1 Litre
65mm
173mm
Water heater must be mounted on the wall by fixing 3 nos. of screws (as provided)
Plumbing
1. Make necessary plumbing with reference to the above installation diagram.
2. It is recommended that suitable nylon/SS braided hoses should be used. These hoses
should have a minimum pressure rating of 6.5 Bar and should be compatible for hot water
applications.
3. Connect the cold water pipe to the inlet [blue].
4. Connect the hot water pipe to the outlet [red].
Attention: Make sure a suitable sealing tape is used for all water connections to prevent
leakage. Meanwhile, the hoses should not be tightened excessively over the inlet/outlet
tubes of the product. The hexagonal faces of the inlet outlet tubes must be held firmly by
means of a suitable wrench while fastening the hoses onto them. Failure to do so will
result in damages to the product and voids the guarantee.
3

Electrical Connections
4
Filling Water
EWS 3 Litre EWS 1 Litre
1. Open a hot water faucet nearby to permit the air to escape.
2. Open the cold water inlet valve fully, filling the heater and the piping.
3. Close the hot water faucet when water flows.
4. Check all the connections to see if there is any leak. In case of a leak, drain the heater
completely, repair the leaking joint and then refill the heater.
 The Power cord is provided with this water heater. Customer should procure a suitable plug
with adequate ratings.
 For a 3kW unit , the power plug should be having a minimum 15 A rating.
 For a 4.5kW unit , the power plug should be having a minimum 20 A rating.
 The Power plug should be BIS certified in view of Product performance and Safety.
Warning:
Connect the water heater using independent sockets, adhering to national standards, to
ensure reliable earthing. Do not use adapters. Use pen multimeter to check whether the
live line and neutral line are not reverse, to ensure complete safety.
Note :
 The RED, BLACK and GREEN wires in the power cord corresponds to Live, Neutral & Earth
connections.
 These should be connected in the Plug accordingly. It is not permitted to leave out or
short the earth wire with Neutral.
 Reliable earthing in the circuit should be ensured by the customer before installation.
 Ensure that the Live, Neutral & Earth Terminals in the plug corresponds to the same in the
socket.
 Use a pen multimeter to check the socket for any reversed Live & neutral lines and take
corrective action by a qualified electrician if required.
Safety Valve
Cold water inlet
Hot water outlet
Safety Valve
Cold water inlet
Hot water outlet

1. Ensure the installation is done as per instructions (refer Mounting, Plumbing & Electrical
Connections section in pages 3 & 4).
2. Ensure the inner container is filled with water (refer Filling Water section in page 4).
3. Plug in the electrical power cord & switch on the electrical supply.
4. Once the water heater is switched on, both the red & green indicators will glow. Red light
indicates the heating & green light indicates the power supply to the water heater.
5. After the water reaches the preset temperature, the red light will switch off indicating that
the heating is completed & water heater is in standby mode. The water heater will be in
standby mode until the hot water is withdrawn from the outlet or the temperature of
the water drops due to passage of time.
6. Open the outlet faucet to get the hot water. Upon withdrawing sufficient amount of hot
water, the water heater will again enter into heating mode. This is indicated by glowing of
red & green lights.
7. After usage, switch off the electrical supply & close the outlet valve.
Caution: Hot water over 50°C will cause scalding. In order to protect you and your family
especially for the safety of children, ensure that the hot water flow & cold water mix is
adjusted in the faucet accordingly before usage. It is advised not to use the outlet from
this water heater directly in a shower or in a faucet. Suitable mixing with cold water is
required before usage.
Operation Instructions
Warning: This water heater should not be operated with insufficient amount of water.
Failure to do so may result in damage to the water heater & injuries to the users. This
will also make the warranty null & void.
Warning: The water heater should be connected to the mains using a power plug
conforming to national standards and suitable current carrying capacity (refer Electrical
Connections in page 4).
Do not switch on the heater, if the water in the inner container is in frozen condition.
5

Troubleshooting
Note: Call Customer Care Centre on 1.800.103.2468
Problem Possible Cause(s) Solution
• Green and Red No power to heater Turn on electrical switch. Check for
light off blown fuses or tripped breaker
• No hot water Thermal cutout switch open Press Reset button
Control circuit or internal Call Customer Care Centre
wiring error
• Green light on Non-functioning Call Customer Care Centre
Red light off thermostat
• No hot water Control circuit or internal
wiring error
• Water heats slowly Non-functioning element Call Customer Care Centre
• Thermostat does Non-functioning Call Customer Care Centre
not shut off thermostat
Improper calibration Call Customer Care Centre
• Piping connection Connection not sealed Call plumber
leaks
• Leaky cover Tank or parts leak Shut off power immediately and
Call Customer Care Centre
6
Circuit Diagram
G
N
L
1
5
2
4
3
1. Cut-out
2. Indicator Lamp Green
3. Thermostat
4. Indicator Lamp Red
5. Heating Element

Warranty
Product warranty
Warranty
on tank
5
Extended
Warranty*
3
7
Your A. O. Smith water heater is warranted against defects
arising from faulty design, workmanship and materials for a
period of 24 months from the date of the invoice, subject to
the following conditions:
1. The customer will notify the Company promptly about
defects noticed and give the Company or its Authorised
service provider adequate opportunity to inspect, test
and remedy them, for which the customer will deposit
the goods, if necessary, with the Company's
Office/Authorised service provider along with the
original invoice.
2. Special warranty from the date of purchase is subject to
the following conditions:
• Tank - 5 Years
• Glass Coated Heating Element - 2 + 1 Years*
• Rest of the parts - 2 Years
3. Inspection and Test Report of the Company's
Office/Authorised service provider will be treated as
final and binding under the warranty for determining
the defects, repairs/alterations required or carried out,
or certifying working of the goods thereafter.
4. The Company or its Authorised service provider will be
entitled to retain any defective part replaced under the warranty.
5. The Company's liability under the warranty will be limited only to defects which occur
under conditions of proper installation, normal operation and under proper use. It
excludes defects occurring because of abuse, faulty care or maintenance and
repairs/alterations to product or the parts by unauthorised person.
6. Components subject to wear, are not covered under this warranty.
7. The customer will have no claim under this warranty in respect of any personal injury,
damage or property or consequential damages, or for utilisation of the goods not in
accordance with the user guide.
* Register your product with the
A. O. Smith Customer Care
Centre [1.800.103.2468] within
60 days of purchase and you will
get an extended warranty on the
element [from 2 years to 3 years].

General Terms of Warranty
1. The “goods” shall mean the goods described in the purchase agreement.
2. “The customer” shall mean the original purchaser under the purchase agreement.
3. “The Company” shall mean A. O. Smith India Water Heating Pvt. Ltd.
4. The “Purchase Agreement” shall mean the General Terms and Conditions of Sale agreed
upon by the customer and the Company as printed on the Invoice.
5. “Invoice” shall mean the Invoice issued for the Unit by the Company or Authorised Dealer
to the customer describing the goods and indicating, inter alia, the total purchase price
thereof, the name of the customer and the place where the goods are to be installed.
6. “User Guide” shall mean the instructions for installation leaflet published by the Company
and delivered to the customer.
Note: Follow any one for registration of the Extended Warranty
• Call our dedicated Customer Care Centre 1.800.103.2468.
• Fill up the details in our website link
(http://www.aosmithindia.com/warranty-form.aspx) to register.
• Fill up the details in the Warranty Card and mail the same to A. O. Smith India Water
Heating Pvt. Ltd., factory address.
Post Warranty
1. The customer may be offered a yearly Service Contract at the prevailing Company rates
and terms.
2. In case the customer does not wish to enter the Service Contract, he has the option of
calling our Authorised service provider and having his A. O. Smith Water Heater unit
serviced on actual basis i.e. by paying the Labour Cost and Spares needed to attend to that
Service or Complaint Call at the prevailing Company rates. Such service will be rendered by
the Company in towns or places where the Company has its Authorised service providers.
3. In case of product repair after warranty by Authorised service provider, all expenses of
transporting the goods to and from the Authorised service provider shall be borne by the
customer directly.
4. If, during such service, it is necessary for the Company or Authorised service provider to
replace or repair defective components or parts, the customer shall be required to pay for
the same as per the Company's prevailing price list.
Guaranteed Service
1. Different models has different service delivery levels.
2. Service level mentioned for particular models are applicable for Metros & A Class Cities e.g.
Delhi & NCR, Bangalore, Hyderabad, Mumbai, Kolkata, Pune, Goa, Cochin, Chennai,
Chandigarh & Ahmedabad.
3. Service level deliverables are valid up to city municipal limit only.
4. Service level may differ in case of public holidays & unavoidable conditions due to natural
climate, any political & regional regulations.
Jurisdiction
The courts of competent jurisdiction at Bengaluru, Karnataka shall have exclusive jurisdiction
over all matters arising out of any disputes in relation to the product.
8

Warranty Card (Company Copy)
(To be sent back to the Company) Unit Serial Number:
Dealer’s Stamp and Signature
Invoice Number: Dated:
Customer's Name and Address:
Model: Capacity:
Warranty Card
Warranty Card (Customer Copy)
(To be retained by the Customer) Unit Serial Number:
Dealer’s Stamp and Signature
Invoice Number: Dated:
Customer's Name and Address:
Model: Capacity:
Warranty Card
9

Service and Maintenance
For Service needs:
Please contact our A. O. Smith
Toll Free Number : 1.800.103.2468
SMS us : +91770.292.8887
Email us : [e-mail]
For grievances please contact : [e-mail]
Registered Office
A. O. Smith India Water Heating Private Limited
Plot No. 300, Phase-2, KIADB Industrial Area, Harohalli, Kanakapura Taluk,
Ramanagara District - 562 112, Karnataka, India.
 Toll Free No.: 1.800.103.2468  Website: www.aosmithindia.com
10
Regional Office
Delhi:
105 & 106, Plot No. 19, Sagar Plaza, Laxmi Nagar District Centre,
Vikas Marg, Laxmi Nagar, New Delhi - 110 092.
Kolkata:
224 A, Office No. 811, 8th Floor, Krishna Building, AJC Bose Road,
Kolkata - 700 017.
Mumbai:
Sanjar Enclave, No. 509, CTS No. 428, S.V. Road,
Opp. Milap Cinema, Kandivali (West), Mumbai - 400 067.
Pune:
401 & 402, Citi Mall, Ganeshkhind Road, Near Pune University,
Pune - 411 007.

Manufactured by A. O. Smith India Water Heating Private Limited
Plot No. 300, Phase-2, KIADB Industrial Area, Harohalli, Kanakapura Taluk, Ramanagara District - 562 112, Karnataka, India.
Toll Free: 1.800.103.2468  Website: www.aosmithindia.com
Part No.: 323976-000_R3 Dt: 10-05-2013