A.O. Smith EES - 30 Troubleshooting guide

EES 30 EES 66
EES 40 EES 80
EES 52 EES 120
United Kingdom & Ireland
ELECTRIC HOT WATER STORAGE HEATERS
Installation, User and Service Manual
Innovation has a name.
0313297 3918 –Changes Reserved.

2
Read this manual carefully
Warning
Read this manual carefully before using the
device. Not reading this manual and not
following the instructions in this manual may
lead to personal injuries and damage to the
device.
Copyright © 2009 A.O. Smith Water Products
Company All rights reserved.
Nothing from this edition may be copied,
reproduced and/or made public by means of
press, photocopying or in any other way
without the prior written permission of
A.O. Smith Water Products Company.
A.O. Smith Water Products Company
reserves the right to change the
specifications as
mentioned in this manual.
Trademarks
All brand names mentioned in this manual
are registered trademarks of the respective
suppliers.
Liability
A.O. Smith Water Products Company does
not accept any liability for claims of third
parties as a result of incompetent use other
than mentioned in this manual and in
conformity with the General Terms and
Conditions as filed with the Chamber of
Commerce.
For further information see the General
Terms and Conditions. These can be
obtained from us free of charge.
Although utmost care has been taken in
ensuring a correct and, where necessary,
complete description of the relevant parts,
the manual may contain errors and some
things may be unclear.
Should you still discover faults or things
which are unclear, please inform us about
this. It helps us to further improve the
documentation.
Additional information
If you have any remarks or questions
concerning specific subjects related to the
device, please do not hesitate to contact:
A.O. Smith Water Products Company
P.O. Box 70
5500 AB Veldhoven
The Netherlands
Telephone: (free) 0870 - AOSMITH
0870 - 267 64 84
General: [phone]
Fax: [phone]
E-Mail: [e-mail]
Website: www.aosmith.co.uk
For problems with respect to connections to
electricity and water supplies, please contact
the supplier/installation engineer of your
installation.

3
CONTENTS
1. GENERAL...................................................................................................................4
1.1 Description of the apparatus........................................................................................4
1.1.1 Packaging material......................................................................................................4
1.1.2 Disposal......................................................................................................................4
1.2 Technical safety devices..............................................................................................4
1.2.1 Thermostat..................................................................................................................4
1.3 Technicaldescription ....................................................................................................4
1.3.1 Dimensions .................................................................................................................5
1.3.2 Technical Data ............................................................................................................6
1.3.3 EcoDesign Data ..........................................................................................................7
2. FOR THE INSTALLER................................................................................................8
2.1 Installation instructions ................................................................................................8
2.2 Installation...................................................................................................................8
2.2.1 Water connection.........................................................................................................8
2.2.2 Electrical connection....................................................................................................8
2.3 Putting into operation...................................................................................................9
2.3.1 Filling of the heater......................................................................................................9
2.3.2 Putting into operation...................................................................................................9
2.3.3 Putting out of operation ...............................................................................................9
2.3.4 Temperature control....................................................................................................9
2.4 Maintenance..............................................................................................................10
2.4.1 Sacrificial anode........................................................................................................10
2.4.2 Decalcification...........................................................................................................10
2.5 Measures to be taken at moments of failures ............................................................10
2.5.1 Safety thermostat......................................................................................................10
2.5.2 Water temperature not right.......................................................................................10
2.5.3 Warm water temperature too high .............................................................................10
2.5.4 Probability of a water leakage....................................................................................10
2.5.5 Measures ..................................................................................................................11
2.6 Spare Parts...............................................................................................................11
3. FOR THE USER........................................................................................................12
3.1 Instructions for use....................................................................................................12
3.2 Use ...........................................................................................................................12
3.3 Putting out of operation .............................................................................................12
3.4 Maintenance..............................................................................................................12
3.5 In case of failures......................................................................................................12
4. WARRANTY .............................................................................................................13
4.1 General warranty.......................................................................................................13
4.2 Tank warranty............................................................................................................13
4.3 Conditions of installation and use ..............................................................................13
4.4 Exclusions.................................................................................................................13
4.5 Extent of the warranty................................................................................................14
4.6 Claims.......................................................................................................................14
4.7 Obligations for A.O. Smith.........................................................................................14

4
1. GENERAL
1.1 Description of the apparatus
The construction and equipment of the
electric storage heater meet the European
standards for electric household apparatus
(EN60335-1 and EN60335-2-21). Thus, the
heater is in conformity with the European
directives of electric household apparatus,
implying the authority to bear the CE-mark.
The heater is appropriate for aworking power
of 8 bar (=800 kPa). The tank is of steel plate
and has got a glasslined coating, in its
interior. Simultaneously, the tank is provided
with two sacrificial anodes, as an additional
protection against corrosion. A thick FFC
insulating layer, surrounded by a steel casing
is preventing it from an unnecessary loss of
heat. As soon as the heater will be
completely filled with water, it will continually
be under the pressure of the water supply.
Draining hot water, the heater will
immediately be refilled with cold water. A
good transmission of heat is given by the use
of incoloy heating elements.
Additional comfort can be created by making
use of a circulation pipe with the
corresponding pump. The connection of the
above pipe will have to take place at the cold
water pipe.
1.1.1 Packaging material
The packaging protects the device against
transportation damage. The selected
packaging material is environmentally
friendly, recyclable and can be disposed of in
a relatively easy and environmentally friendly
way.
1.1.2 Disposal
Old and discarded devices contain
substances that are to be recycled. Please
take the local laws with respect to waste
processing into account when disposing of
old and discarded devices.
Never dispose of your old device through the
domestic waste, but bring it to a municipal
collection point for electric and electronic
equipment. If necessary, ask your
dealer/installer for information. Store the old
device outside the reach of children.
1.2 Technical safety devices
1.2.1 Thermostat
The heater is provided with one or two
regulating thermostats with a setting range
between 32 °C and 82 °C. Further on, the
heater is equipped with one safety
thermostat, being set at 95 °C.
1.3 Technical description
IMD-0299

5
1.3.1 Dimensions
Description
Unit
EES 30
EES 40
EES 52
A
Total height
mm
930
1110
1370
D
Diameter of the apparatus
mm
520
520
520
R
Height of drain tap
mm
110
110
110
S
Height of T&P plug
mm
730
970
1210
1
Connection cold water
-
3/4 " - 14 NPT
3/4 " - 14 NPT
3/4 " - 14 NPT
2
Connection hot water
-
3/4 " - 14 NPT
3/4 " - 14 NPT
3/4 " - 14 NPT
3
Connection T&P plug
-
3/4 " - 14 NPT
3/4 " - 14 NPT
3/4 " - 14 NPT
4
Connection drain tap
-
3/4 " - 14 NPT
3/4 " - 14 NPT
3/4 " - 14 NPT
Description
Unit
EES 66
EES 80
EES 120
A
Total height
mm
1530
1540
1620
D
Diameter of the apparatus
mm
560
610
710
R
Height of drain tap
mm
110
110
110
S
Height of T&P plug
mm
1360
1330
1385
1
Connection cold water
-
3/4 " - 14 NPT
3/4 " - 14 NPT
3/4 " - 14 NPT
2
Connection hot water
-
3/4 " - 14 NPT
3/4 " - 14 NPT
3/4 " - 14 NPT
3
Connection T&P plug
-
3/4 " - 14 NPT
3/4 " - 14 NPT
3/4 " - 14 NPT
4
Connection drain tap
-
3/4 " - 14 NPT
3/4 " - 14 NPT
3/4 " - 14 NPT

6
1.3.2 Technical Data
Type
Unit
EES 30
EES 40
EES 52
Tankage
lt.
115
155
190
Number of elements
-
2
2
2
Capacity (220 V)
kW
2,5
2,5
2,5
Capacity (240 V)
kW
3,0
3,0
3,0
Heating time up to 60°C *
(220/240 V)
min
159/134
214/180
263/221
Heating time up to 40°C *
(220/240 V)
min
95/87
129/118
158/133
Tap capacity 1st hour 60°C **
(220/240)
lt.
149/157
187/194
219/227
Tap capacity continuous 60°C **
(220/240)
lt/hr.
43/52
43/52
43/52
Tap capacity 1st hour 40°C **
(220/240)
lt.
248/261
311/324
366/379
Tap capacity continuous 40°C **
(220/240)
lt/hr.
72/86
72/86
72/86
Weight
kg
36
43
48
Type
Unit
EES 66
EES 80
EES 120
Tankage
lt.
250
300
450
Number of elements
-
2
2
2
Capacity (220 V)
kW
2,5
2,5
2,5
Capacity (240 V)
kW
3,0
3,0
3,0
Heating time up to 60°C *
(220/240 V)
min
346/291
415/349
632/523
Heating time up to 40°C *
(220/240 V)
min
208/174
249/209
374/314
Tap capacity 1st hour 60°C **
(220/240)
lt.
276/284
323/330
463/471
Tap capacity continuous 60°C **
(220/240)
lt/hr.
43/52
43/52
43/52
Tap capacity 1st hour 40°C **
(220/240)
lt.
459/473
538/551
772/785
Tap capacity continuous 40°C **
(220/240)
lt/hr.
72/86
72/86
72/86
Weight
kg
64
80
125

7
1.3.3 EcoDesign Data
Description
unit
EES 30
EES 40
EES 52
Load Profile
-
L
L
XL
Energy Efficiency Class
-
C
C
C
Water Heating Efficiency
%
39.3
38.0
38.0
Daily Electricity Consumption
kWh
11.907
12.394
20.320
Daily Fuel Consumption
kWh GCV
0.000
0.000
0.000
Mixed Water 40°C (V40)
ltr.
143
187
237
Additional Load Profile
-
-
-
-
Energy Efficiency
%
-
-
-
Daily Electricity Consumption
kWh
-
-
-
Daily Fuel Consumption
kWh GCV
-
-
-
Mixed Water 40°C (V40)
ltr.
-
-
-
Description
unit
EES 66
EES 80
EES 120
Load Profile
-
XL
XL
XL
Energy Efficiency Class
-
C
D
D
Water Heating Efficiency
%
38.0
37.8
37.3
Daily Electricity Consumption
kWh
20.039
21.500
20.830
Daily Fuel Consumption
kWh GCV
0.000
0.000
0.000
Mixed Water 40°C (V40)
ltr.
295
368
552
Additional Load Profile
-
-
-
-
Energy Efficiency
%
-
-
-
Daily Electricity Consumption
kWh
-
-
-
Daily Fuel Consumption
kWh GCV
-
-
-
Mixed Water 40°C (V40)
ltr.
-
-
-

8
2. FOR THE INSTALLER
2.1 Installation instructions
The heater will not be installed but in spaces
meeting the national and local regulations.
These spaces will be frost protected.
2.2 Installation
The installation will be effected according to
the current general and local regulations of
the electric and water works, and that, by an
authorized installer.
2.2.1 Water connection
The max. admissible working pressure of the
heater will amount to 8 bar. On the cold water
side, the heater will have to be provided with
a stop valve, as well asan approved inlet
combination. The overpressure side, of the
inlet combination, will have to be connected
to an open water discharge. Insulating long
pipes, will prevent from waste of energy.
2.2.2 Electrical connection
The electric installation will always be
effected by an authorized installer, as well as
according to the general and current
regulations of the electricity works. This
heater will have to be provided with a main
switch, as soon as a fixed connection is
involved.
Warning:
Earth/Ground the equipment
1. Power supply connection
2. Safety thermostat of two poles
3. Regulating thermostat (with priority
switch)
4. Heating elements
5. Regulating thermostat
A
Wiring diagram for non-simultaneous use of
heating elements
Scope:
EES 30, EES 40, EES 52, EES 66, EES 80,
EES 120
Power supply: 220-240 V 50-60 Hz IP40

9
2.3 Putting into operation
2.3.1 Filling of the heater
1. Installthe draintap and check whether it is
closed.
2. Open the cold water tap leading to the
heater and the rest of the taps of warm
water outlet, for ventilation. The
apparatus will be filled, as soon as water
is flowing out of every outlet.
3. Again, turn off all the taps of warm water
outlets.
2.3.2 Putting into operation
1. Check, whether the heater is filled with
waterand whether all electric connections
leading to it are actually well carried out.
2. Check whether the cold water inlet is
open.
3. Open the covering plate at the front
remove the insulation to be found
thereunder. Now, theregulating
thermostats will be accessible. And can
subsequently be adjusted at the
demanded temperature, by turning the
selector switch by a screwdriver.
4. Set the demanded temperature, on the
regulating thermostat (see table). The
temperature adjustedex works is of
60°C.
Temperature in °F
Temperature in °C
90
32
100
38
110
43
120
49
130
54
140
60
150
66
5. Replacetheinsulationand put back the
coveringplate.
6. With a fixed connection, switch on the
main switch or, otherwise, put the plug
into the socket. Thereon, the apparatus
will be in operation and start to work,
automatically.
2.3.3 Putting out of operation
1. For short periods: Remove theplugfrom
the sockey or, if the connection is fixed,
switch off the main switch.
2. For longer periods, it will be
recommendable to not only act according
to the advises sub 1, but also shut of the
water supply pipe and, as soon as the
heater will be cooled off, let out the water
(fittingan outlet pipe on the drain tap and
open it), in view of the danger of frost.
(Open the nearest warmwater drain taps,
as well, so that the tank can be
ventilated). Whenever the heater will
have to be emptied completely, detach it
and let it slope in the direction of the
drain tap.
2.3.4 Temperature control
The apparatus is under the pressure of the
water supply (max. 8 bar). There will be
supplied the same quantity of cold water as
the one used up of hot water. This implies
that in the moment of showing the thermostat a
temperaturebeing inferior to the set one, the
electric circuit will be closed,makingan
electriccurrentpassthroughtheheating
element.Afterhaving reached thedemanded
temperature, the thermostat will interrupt the
contact again. High water temperature will
involve a calcium precipitation,inside
the heater. Therefore, it is recommended to
maintain the adjusted temperature of 60 °C, so
that less furring will occur. Moreover, a built in
safety thermostat will completely interrupt the
currentsupply, at a water temperature of 95 °C.

10
2.4 Maintenance
At least once a year, the heater will have to
be checked and cleaned by an expert, to
guarantee its good function.
Important advises
The heater must NEVER be put into
operation, with the cold water supply
turned off.
The heater must not be under pressure
nor voltage, in the course of a
maintenance.
2.4.1 Sacrificial anode
The service life of the anodes is determined
by the quality and quantity of the water
flowing through. That is why iet will be
recommendable to have the anodes
inspected, every year.
1. Turn off the cut-off cock of the feed pipe
of cold water.
2. Open the nearest warm water tap, to
eliminate the water pressure of the
heater and the waterconduit.
3. Loosen the anode by the right key.
4. Inspect and replace it, whenever used off
by60%.
5. Screw in the anode to be waterproof.
If the anode must be replaced, make sure
that the new one always will be of exactly the
same type. This can be checked by the type
of the heater, as well as by the complete
serial number.
2.4.2 Decalcification
The lime forming is a sequel of the quality
and the demand of the water. Besides, lime
forming will always be of a higher degree with
high water temperatures than with low ones.
Therefore, it is recommended to adjust the
temperature at 60 °C, so that the degree of
calcium precipitation can be kept at a low rate.
Decalcification will have to be done by using
appropriate means. If you need more detailed
information thereon, the relevant instructions
are available.
2.5 Measures to be taken at
moments of failures
Whenever there is a failure, the items given
below will have to be checked before calling
a trouble-shooting service.
2.5.1 Safety thermostat
Every heater has got a number of safety
thermostats interrupting the electric circuit, at
high water temperatures (95°C). These
safety thermostats cannot be reset but after a
decrease of the temperature by 20°C.
Subsequently, the regulating thermostat will
be checked: if it has been adjusted at a high
temperature, the thermostat will probably be
broken and must be replaced.
2.5.2 Water temperature not right
1. Check the adjustment of the regulating
thermostat.
2. Check whether there are leakages and/or
open taps.
3. Check whether the wiring is still correctly
connected.
4. It’s possible that the consumption of hot
water is higher than it had been
calculated,originally.
5. Inspect whether the cold water inlet pipe
has got the right position.
2.5.3 Warm water temperature too high
Check whether the regulating thermostat is
set too high.
2.5.4 Probability of a water leakage
1. Check whether the drain tap is
completely shut.
2. Check whether the water connections are
waterproof.

11
2.5.5 Measures
Trouble
Cause
Measures to be taken
Insufficient or no hot water
at all
The temperature is set too low
Adjust the regulating thermostat
higher
The safety thermostat is
interrupting the electric circuit
Press the reset button
There is no hot water supply left
Reduce the hot water
consumption. Admit the necessary
heating time
The plug is out of the socket
Put the plug into the socket
The cause cannot be determined
Turn off the main switch and/or
remove the plug from the socket
Leakage
Insufficient packing of the water
connection (threaded connection)
Tighten the threaded connections
Leakage due to other water
apparatus or pipes, sited in the
neighborhood
Find the cause
2.6 Spare Parts
When ordering spare parts, it will be
necessary to specify the type of apparatus
and the complete serial number. Thereby,
the data of the spare parts can be
determined.

12
3. FOR THE USER
Installing and putting into operation the
heater for the first time will have to be done
by an authorized installer.
3.1 Instructions for use
Operating procedure:
1. Check whether the heater is filled with
water.
2. Turn on the main switch, whenever there
is a fixed connection or put the plug into
the socket.
3.2 Use
Theheateris underthepressureofthewater
supply(max. 8 bar). The quantity of cold
water being supplied, will exactly correspond
to the one of the consumption of hot water.
The regulating thermostat will switch on the
electric supply, automatically. This implies
that the electric circuit will be shut and heat
supplied to the water,whenever the
temperature is inferior to the demanded one.
The electric circuit will be interrupted again,
at the moment the demanded temperature
will be reached.
Temperature in °F
Temperature in °C
90
32
100
38
110
43
120
49
130
54
140
60
150
66
Inviewof thelimitationoftheprecipitationof
calcium,it will be recommendable to adjust
the temperature at 60 °C. Besides, a safety
thermostat will be fitted, interrupting
completely the electric circuit, the water
temperature having reached 95 °C. After this
temperature will have fallen by 20 °C, the
thermostat can be reset, again. Inthecaseof
anotherinterventionofthesafetythermostat,
with the regulating thermostat being adjusted
at a high temperature, this last one will have
to set at a lower temperature.Ifthere will still
beanotherinterventionof the safety
thermostat, the regulating one will probably
be out of order.
3.3 Putting out of operation
Operating procedure:
1. For short periods: Remove the plug from
the socket or, with a fix connection, turn
off the main switch.
2. For longer periods it will be
recommendable, in view of the danger of
frost, not only take the measures
indicated sub 1, but also turn off the
water supply pipe and, after the heater
will have cooled down, drain the water
(connect a drain hose on the drain tap
and open it). Also, open the nearest hot
water tap drain, so that the tank can be
ventilated. If there is the intention to
totally empty the heater, uncouple it and
let it slope in the direction of the drain
tap.
3.4 Maintenance
Regularly test the inlet combination by
discharging it (activate the discharge button).
The water must come out of it as a thick jet:
Check, whether the drain pipe is open. It will
be recommendable to sign a contract, based
on a maintenance, once a year.
When ordering spare parts, it will be
necessary to specify the type of apparatus
and the complete serial number. Thereby, the
data of the spare parts can be determined.
3.5 In case of failures
Whenever there is a failure, do switch off the
water heater by means of turning the main
switch and call for help by an authorized
service engineer.

13
4. WARRANTY
4.1 General warranty
If, within one year from the original
installation date, after investigation and
exclusive evaluation by A.O. Smith, a water
heater delivered by A.O. Smith turns out to
have a part, with the exception of the tank,
that is not properly functioning as a result of
manufacturing or material faults, A.O. Smith
will replace or repair this part.
4.2 Tank warranty
If within 5 years of the original installation
date, after investigation and exclusive
evaluation by A.O. Smith, a water heater
delivered by A.O. Smith turns out to have a
steel glass-lined tank that is leaking as a
result of rust or corrosion from the water side,
A.O. Smith will replace the whole water
heater by a completely new one of similar
size and quality.
The replacement water heater will have a
warranty that will be valid for the remaining
period of the warranty for the original water
heater delivered. Notwithstanding the
provisions in Article 2, the warranty term will
be reduced to one year after the original
installation date if unfiltered or softened water
is flowing through the water heater or left in it.
4.3 Conditions of installation and
use
The warranty referred to in Articles 1 and 2
only applies if the following conditions are
met:
a) that the water heater is installed
according to the installation instructions
of A.O. Smith for the specific model, as
well as according to the local and
national installation and building
regulations, instructions and rules;
b) that the water heater will remain installed
in the original installation position;
c) that only drinking water is used, which is
allowed to circulate freely at all times (a
separately installed heat exchanger is
requisite for the heating of saline or
corrosive water);
d) that the tank has been defurred to
remove harmful scale deposits by means
of periodic maintenance;
e) that the water heater water temperatures
do not exceed the maximum settings of
the thermostats that are part of the water
heater;
f) that the water pressure and/or heat load
do not exceed the maximum values
indicated on the water heater’s
identification plate;
g) that the water heater has not been
installed in a corrosive atmosphere or
environment;
h) that the water heater has been provided
with an inlet combination, approved by an
authorized body, of sufficient capacity,
not greater than the operating pressure
indicated on the water heater, and, if
applicable, with a temperature and
pressure relief valve, also approved by
an authorized body, which has been
mounted according to the installation
instructions of A.O.
i) Smith that apply to the specific water
heater model, as well as according to the
local and national instructions,
regulations and rules;
j) that the anodes are replaced and
renewed if and when they have 60 % or
more wear.
4.4 Exclusions
The warranty referred to in Articles 1 and 2
does not apply:
a) for equipment that are not used for
domestic use, guarantee on the tank for
one year after the initial installation date
applies, with the conditions shown in
article 2.
b) if the water heater has been damaged by
an external cause;
c) in case of abuse, neglect (including
freezing), modification, incorrect and/or
deviating use of the water heater and if
attempts have been made to repair leaks;
d) if contamination or other impurities were
allowed to flow into the tank;

14
e) if the conductivity of the water is less
than 125 microSiemens and/or the
hardness of the water is less than
5,6°DH;
f) if unfiltered, recirculated water flows
through or is stored in the water heater
g) if the owner has attempted to repair a
defective water heater himself.
4.5 Extent of the warranty
A.O. Smith’s commitments pursuant to the
warranty provided are confined to the
delivery free of charge of the water heater to
be replaced or any parts thereof ex the
Veldhoven warehouse. Any costs involved
with transport, labor, installation or any other
capacity connected to the replacement
cannot be charged to A.O. Smith.
4.6 Claims
A claim based on the warranty provided shall
be deposited with the dealer from whom the
water heater was purchased or any other
dealer who sells products manufactured by
A.O. Smith. The examination of the water
heater as referred to in the Articles 1 and 2
will take place in an A.O. Smith laboratory.
4.7 Obligations for A.O. Smith
In relation to its water heaters or else the
water heaters (or parts or components
thereof) supplied for replacement, no
warranty or guarantee is given by A.O. Smith
other than the warranty given here. A.O.
Smith will not be held liable for any damage
to property or persons under the warranty
given or in any other way caused by a water
heater it has supplied (parts or components
or the steel glass lined tank) (for
replacement).
This warranty applies to the following models:
EES 30 EES 66
EES 40 EES 80
EES 52 EES 120

15
0313297 R0

Your Installer
Nederland
A.O. Smith Water Products Company B.V.
Postbus 70
5500 AB VELDHOVEN
0800 - AOSMITH (2676484)
[email protected]
www.aosmith.nl
France
A.O. Smith L’Eau Chaude SARL 14,
allée Charles Pathé
1800 Bourges
01 3975 5140 ou 008008 - AOSMITH (2676484)
[email protected]
www.aosmith.fr
United Kingdom
A.O. Smith Water Heaters
Unit B8 Armstrong Mall, Southwood Business Park, Farnborough,
Hampshire, GU14 0NR
0870 - AOSMITH (267 6484)
[email protected]
www.aosmith.co.uk
Deutschland
A.O. Smith Water Products Companny B.V.
Postbus 70
5500 AB Veldhoven
[phone]
[email protected]
www.aosmith.de