A.O. Smith Gen 8 Digital Bedienungsanleitung

Mini Water Heater

Gen 8 Digital

EWH-40MINI2

User Guide

About A. O. Smith

Established in 1874, the A. O. Smith Water Products Company is a global leader in innovative water

technologies. With 21 fully-owned plants, they are currently the largest water heater manufacturer in the

world.

Over the years, A. O. Smith has gained the respect and support of homeowners, contractors, architects

and specifying engineers in over 60 countries by providing energy efficient hot and clean water

solutions.

What’s in the box?

Contents

Specifications ........................................................................................... 5

Safety Features ....................................................................................... 6

Product Features ...................................................................................... 6

Installation ................................................................................................. 9

Directions For Use .................................................................................... 13

Maintenance Instructions ....................................................................... 17

Troubleshooting ....................................................................................... 18

Read Before Use

Before installation and use of this device, please read this manual carefully and keep it ready for future

reference.

Engage an experienced water heater installer. A. O. Smith and AOS Bath will not be held liable by any

damages or piping leakages caused by incorrect installations.

This heater is suitable for residential use. Any attempts to use it for commercial purposes will reduce the

heater lifespan. Once the heater has been installed, owners should run checks every 6 months and the

system should undergo maintenance every 3 years. If there are any operational irregularities, please

discontinue use of the heater immediately and call our company hotline.

Before any instances of heater repair and maintenance, users should disconnect the power supply. Any

modifications and repairs should only be handled by company approved technicians.

Heaters may cause serious scalding. Mix hot with cold water before showering or taking a bath.

If heater suffers from dry heating, any resultant steam and hot water may cause serious scalding. As a

result, users should ensure that the heater tank is always full of water. If dry heating occurs, immediately

cut off electrical & water supply and stop using the heater. Call our company service hotline and wait for

our approved technicians to do the necessary checks and repair.

For safety issues, do not change any of the settings of the pressure relief valve or temperature pressure

relief valve. Ensure all blockages are clear and install a drainage pipe to allow the overflow water to be

discharged into a floor drain.

Water produced by the heater is not potable and should not be consumed.

Any circuits, gauges, circuit breakers and wiring used for the heater must meet current ampere

requirements and be checked by approved technicians. Do not use damaged circuitry or an outdated,

loose, unstable power outlet for the heater. This will cause electrical shocks, fuses, fires, etc.

Heater electrical connections must be used in tandem with a dedicated power source located at a dry

area. Do not handle electrical points with wet hands. This may cause electrocution or physical damage to

self.

A white translucent colour to the water produced by the heater is considered normal. This is due to the air

pockets or foam caused by the pressure of dissolved air in water after heating.

Note: Incomplete compliance of this manual’s contents may cause fires, financial or property losses,

personal harm or death.

Warning: This is an electronic appliance and must be used with reliable connections.

Specifications

Rated volume (L)

Power (kW)

4.0

Voltage/Frequency (V/Hz)

220/50

Temperature range (

°C) 35-75±5

Rated water pressure (

MPa) 0.8

Max

-min inlet water pressure (MPa) 2.0/3.0

Inlet/outlet connection (inches)

Waterproof grade

IPX4

A. O. Smith reserves the right to

make product changes or

improvements at any time

without notice.

Dimensions

Length (mm)

880

Width (mm)

340

Height (mm)

350

Safety Features

Thermal Cut Out

The water heater employs a thermal cut out. In case any fault occurs and the water

temperature exceeds the highest preset limits, the switch rapidly cuts off the live and

neutral line for user’s safety.

Pressure Relief Valve

The safety valve will relive pressure automatically through droplets of water when

the system exceeds the rated pressure.

Product Features

Intelligent Maintenance Monitor (IMM)

IMM helps to prevent corrosion of the internal heater tank. The intelligent active

system releases protective ions into the tank, neutralizing aggressive corrosive ions in

the water.

Automatic Energy Saver (AES) (Patent ZL00112584.2)

The AES memory chip records up to 21 days of usage habits and automatically heats

water before users take a bath. During off peak periods, the heater goes into

energy saving mode.

6 MAX heating technology produces thrice as much hot water as a conventional

electric heater without consuming more energy.

6 MAX Heating (Patent ZL200820185859.4)

IMM

Blue Diamond Dual Elements (Patent ZL200510037670.1)

This water heater has two patented Blue Diamond heating elements which increase

heating efficiency by up to 50%.

Touch Control Panel

Access all modes of the water heater or reduce your water heating bills by turning

down your heater thermostat from the control panel.

Hot Water Display

Temperature sensors in the heater provide a visual display of hot water from the

control panel.

Instant Heating (Patent ZL200820185859.4)

Intelligent sleep mode

The heater goes into power-saving mode after 3 minutes of inactivity.

The latest instant technology allows users to get hot water from an unheated tank

immediately, without consuming more energy.

Programmable Timer

The timer powers up the heater for you so you don’t have to turn it on manually. It

also switches your heater to energy saving mode when not in use.

Wireless remote

Program your heater with the wireless remote. The keys are identical to those on

the touch screen panel.

3 Year Full Warranty

With the highest manufacturing standards and strict quality control, we assure users

durability with a 3 year full warranty on the whole unit, the longest warranty in

Singapore.

3years

High Efficiency Insulation

A polyurethane foam insulating layer without freon is used, which provides a good

insulation and reduces heat loss effectively.

Blue Diamond Tank (Patent US6303183)

Patented A. O. Smith Blue Diamond Tanks provide superior durability. The longest

lasting Blue Diamond tank in the world was used for 52 years.

Installation

CAUTION:

•Please wait for 30 minutes before using the heater for the first time.

•The heater should only be connected to a power source after a full installation which ensures

secure mounting, piping, wiring and filling of the tank with water.

•To prevent injuries from lifting heavy equipment, the water heater should be installed by at least

2 persons.

•The water heater must be installed by a qualified personnel.

Location

This water heater should be installed at a location that is close to a power source, floor drain and

water supply. As the water heater is in use, water may be discharged from the pressure relief valve,

so there must be a floor drain near the heater. When installing the water heater, be sure the water

inlet and outlet pipes are at the bottom of the heater. The system must not be installed vertically.

Mounting Procedures and Precautions

The surface for installation must be capable of supporting at least four times the weight of the water

heater when filled with water. If the water heater is not installed on the bearing wall or is mounted

on hollow brick wall, corresponding protective measures must be provided.

This water heater must be installed with the fixing accessories provided. The heater must be hung on

accessories which are fixed firmly or else the heater may dislodge and serious injuries will result.

Mounting Guidelines

Before drilling, ensure the right side of the

heater is at least 300mm away from the wall

so as to allow for easy maintenance access. If

the heater is installed above a false ceiling,

ensure a 500 x 500mm service access directly

below.

Use an electric drill with a Ø12mm drill bit to

drill two holes 100mm in depth. The holes must

be level. The space between the two holes

should be 380mm.

Fit a plastic drill bit into the drilled holes and slowly twist the screws into the holes with an allen key.

Do not over tighten as it may cause the drill bits to break.

Place the screws through the square, top portion of the mounting plates and mount the heater on the

plates. Give the heater a firm downward tug to ensure the screws are lodged firmly against the

brackets.

CAUTION:

•The mounting accessories provided can only be used for solid walls, as shown in the drawing

above. Improper installation may cause the water heater to dislodge.

correct installation incorrect installation100mm depth

Electrical Connection

This water heater must be permanently connected to the electrical supply through a double pole

switch having a contact separation of at least 3mm in all poles incorporated in the fixed wiring. The

insulation of the fixed wiring must be protected by an insulating sleeving with a temperature rating

of at least 80°C.

Ensure the water heater is reliably grounded. The earth wire must be longer than the current carrying

conductors. The maximum power of this water heater is 5000W, hence a single dedicated power

supply circuit is proposed. On 5kW mode, the heater must be connected to a circuit of rated current

no less than 32A. If the wire diameter is 2.5m², the system must operate in 4kW mode.

Switching wattage modes

1. Use screwdriver to remove power adjustment switch cover

2. Turn rocker switch to ’0’ position as shown in the figure

3. Close cover and tighten screws to secure

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