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

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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

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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.