A.O. Smith CEWHR Series Bedienungsanleitung

Intelligent Water Heater

(CEWHR)

CEWHR-40PE6/CEWHR-40

CEWHR-50PE6/CEWHR-50

CEWHR-80PE6/CEWHR-80

CEWHR-100PE6/CEWHR-100

User Guide

About A.O. Smith

In 1936, A. O. Smith developed and patented a technology to glass-line water heaters. 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 innovative, energy efficient products designed for years of

trouble-free service.

Today A. O. Smith Water Products Company, the largest water heater manufacturer in the world, is a

global leader in innovative technology and energy efficient solutions.

What’s in the box?

Contents

Specifications .....................................................................4

Dimensions

Key Features ......................................................................5

Blue Diamond Dual Elements

Blue Diamond Tank

Touch Control Panel

Hot Water Display

Instant Heating

MAX Function

Intelligent Dormancy

Programmable Timer

3 Year Full Warranty

Thermal Cut Out

High Efficiency Insulation

Pressure Relief Valve

Anode Protection

Installation .........................................................................7

Mounting

Mounting Procedures and Precautions

Mounting Guidelines

Plumbing Connection

Water Inlet and Outlet Connection

Power Connection

Water Filling

Control Panel Concealed Installation

Directions for use ...............................................................11

Maintenance Instructions ...................................................16

Maintenance

Troubleshooting .................................................................17

Wiring Diagram

Specifications

Type

CEWHR -Intelligent Water Heater

Rated volume (L)

40 50 80 100

Power (kW)

2.0/3.3 2.0/3.3 2.0/3.3 2.0/3.3

Voltage/Frequency (V/Hz)

230/50 230/50 230/50 230/50

Temperature range (

°C) 35-75±5 35-75±5 35-75±5 35-75±5

Rated water pressure

(MPa) 0.8 0.8 0.8 0.8

Minimum

inlet water pressure (MPa) 2.0 2.0 2.0 2.0

Maximum inlet water pressure (MPa)

3.0 3.0 3.0 3.0

Inlet/outlet connection (inches)

½½½½

Waterproof grade

IPX4 IPX4 IPX4 IPX4

A. O. Smith reserves the right to make product changes or improvements at any time without notice.

Dimensions

Model

CEWHR-40 CEWHR-50 CEWHR-80 CEWHR-100

mm) 718 838 863 1028

L1(

mm) 275 340 365 446

S (mm)

217 217 250 250

D (mm)

Ø395 Ø395 Ø463 Ø463

Key Features

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%.

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.

Touch Control Panel

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

down your water heater’s 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)

Upon activation of the patented instant heating function, users will have hot water to

take a shower within 2 minutes.

MAX Function (Patent ZL200820185859.4)

The patented MAX function allow users to get up to four times the capacity of hot

water from a regular water heater.

Intelligent Dormancy

During periods when water is not used, the heater goes into power-saving mode.

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

Programmable Timer

The timer turns on the water 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.

Thermal Cut Out

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

temperature exceeds the highest preset temperature (93°C), the switch rapidly cuts

off the live and neutral line for user’s safety.

High Efficiency Insulation

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

insulation and reduces heat loss effectively.

Pressure Relief Valve

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

the system exceeds the rated pressure.

Anode Protection

A strong steel core anode rod is used for protecting the inner tank. It greatly

prolongs the service life of the water heater.

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.

Mounting

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

water utilization point. In the installation area, it should be ensured that the water leakage from the

heater or pipeline joints may not cause damage to the articles in adjacent regions or lower layers of

the building. When installing the water heater, be sure to mount the water inlet and outlet pipes at

the bottom of the heater.

Mounting Procedures and Precautions

The surface for installation must be capable of supporting at least three 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 until

the accessories are fixed firmly or else the heater may fall off, and serious injuries might be caused.

Mounting Guidelines

Drill two holes at least 90 mm in depth using an electric impact drill with a Ø 10mm bit. The holes

must be level. Space between the two holes should be as shown in the table.

Model L (mm)

CEWHR-40 260

CEWHR-50 380

CEWHR-80 380

CEWHR-100 380

A plastic expansion tube must be placed into the drilled holes before the brackets are inserted.

It is necessary to use a special inner hexagon spanner to fasten the bolts into the expansion tubes, no

other tools are permitted. Ensure the screw is not excessively tightened. This may damage the

expansion tubes.

Insert the square holes on the upper of supporting rack at the back of the water heater onto the

brackets, then press the water heater down firmly to ensure the holes are lodged 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.

Plumbing Connection

Do not alter the installation position or block the relief valve. Connect the safety valve provided with

this unit to the inlet of the water heater (inlet pipe has a blue cap). The arrow points to the direction

of water flow (to the heater). The storage heater must be permanently connected to the water mains

and the use of a hose set is prohibited. The safety valve must be connected to the discharge pipe,

mounted downwards to a floor drain in a frostless environment. As water may drip from the

discharge pipe during operation of the heater, a floor drain should be provided nearby. The pipes

should not be blocked.

The hot water pipe is connected to the water outlet (outlet pipe has a red cap). If the water pressure

of the inlet pipe approaches or exceeds the relief limit (0.80 MPa) of the safety valve, the valve will

relieve pressure automatically. Refer to the following diagram for the pipe connection. Nylon hoses

should be used for the connection between the tapping pipe and the heater.

We recommend the use of a double check valve assembly for the installation of the water heaters.

The double check valve assembly is a safe and effective measure for preventing backflow and back-

siphonage of water from the water heaters through the inlet pipe.

CAUTION:

•Apply proper sealant to the pipe joints to prevent leakage. Do not over-tighten the safety valve

to avoid damage.

correct installation incorrect installation100mm depth

Water Inlet and Outlet Connection

Power Connection

Profile of heater right side up

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 3300W, hence a single dedicated power

supply circuit is proposed. The core area of the electric supply wire should not be less than 2.5 mm².

Thermal cutout

Live wire (L)

Neutral wire (N)

3000W heating element

Earth wire

2000W heating element

Control Panel Concealed Installation

For the convenience of operation, the control panel may be installed on a wall near the water heater.

Installing the remote panel in the wall:

•Dismantle the control box and remove the wire connected to the panel and the heater

•Thread the wire cable through the fixing panel and back cover

•Assemble the layers in the order as shown. Fix the control box to the wall by pressing firmly against

the front cover.

Front cover

Digital display

Back cover

Wall for

concealed

installation

Fixing panel

Wall opening

Water Filling

After all the pipes are connected, open the discharge valve of the water heater and then the feed

valve. Fill the water heater with water and exhaust the air till a uniform water stream flows out of the

hot water outlet. This indicates that the water heater has been filled up. Close the hot water

discharge valve and check all connections for any leakage. If leakage occurs, empty the water tank,

repair the leaked connection and then refill the heater with water. Do not close the feeding valve

during the filling of water.

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