Heatrae Sadia FBM ECO User manual

FBM ECO
Installation, operation and maintenance manual

2
Contents
1. Introduction ......................................................................................................................................................... 3
1.1 General............................................................................................................................................................. 3
1.2 Symbols used................................................................................................................................................... 3
1.3 Abbreviations ................................................................................................................................................... 3
1.4 HWA Charter ................................................................................................................................................... 3
1.5 Tools required .................................................................................................................................................. 3
1.6 Liabilities........................................................................................................................................................... 4
1.7 Benchmark ....................................................................................................................................................... 4
2. Safety.................................................................................................................................................................... 5
2.1 General safety warnings................................................................................................................................... 5
2.2 Recommendations ........................................................................................................................................... 5
2.3 Specic safety instructions ............................................................................................................................... 5
3. Technical specications ..................................................................................................................................... 6
3.1 Technical data .................................................................................................................................................. 6
3.2 Overall Dimensions .......................................................................................................................................... 7
3.3 Circuit Diagrams .............................................................................................................................................. 8
4. Description of the product ................................................................................................................................. 9
4.1 General description .......................................................................................................................................... 9
4.2 Operation principle ........................................................................................................................................... 9
4.3 Standard delivery ............................................................................................................................................ 10
5. Before installation ............................................................................................................................................... 11
5.1 Installation regulations...................................................................................................................................... 11
5.2 Installation requirements .................................................................................................................................. 11
5.4 Choice of location............................................................................................................................................. 11
5.5 Positioning and access..................................................................................................................................... 11
6. Installation ........................................................................................................................................................... 13
6.1 General............................................................................................................................................................. 13
6.2 Wall xing ......................................................................................................................................................... 14
6.3 Water connections............................................................................................................................................ 16
7. Commissioning .................................................................................................................................................. 18
7.1 General............................................................................................................................................................. 18
7.2 Checklist before commissioning....................................................................................................................... 18
7.3 Commissioning procedure................................................................................................................................ 18
8. Operation ............................................................................................................................................................ 19
8.1 General............................................................................................................................................................. 19
8.2 Benchmark ....................................................................................................................................................... 19
8.3 Overview ........................................................................................................................................................ 19
8.4 Displays and Function ...................................................................................................................................... 19
8.5 Temperature adjustment .................................................................................................................................. 20
9. Maintenance......................................................................................................................................................... 21
9.1 General............................................................................................................................................................. 21
9.2 Routine inspection & maintenance operations – Water Heater Draining ........................................................ 21
9.3 Routine inspection & maintenance operations – Filter Inspection.................................................................... 21
9.4 Routine inspection & maintenance operations – Water Sensor Inspection...................................................... 22
9.5 Routine inspection & maintenance operations – Immersion Heater Inspection............................................... 23
9.6 Routine inspection & maintenance operations - System Overview ..................................................................25
9.7 LCD cover removal........................................................................................................................................... 25
10. Troubleshooting ................................................................................................................................................ 26
10.1 Fault Finding................................................................................................................................................... 26
10.2 Fault codes..................................................................................................................................................... 27
11. Decommissioning.............................................................................................................................................. 29
11.1 Decommissioning procedure .......................................................................................................................... 29
11.2 Environmental Information.............................................................................................................................. 29
12. Spares ................................................................................................................................................................ 30
12.2 Accessories ................................................................................................................................................... 31
13. Warranty ............................................................................................................................................................ 37

3
1. Introduction
1.1 General
The following instructions are offered as a guide to the
user and installer.
The installation must be carried out by a competent
plumbing and electrical installer in accordance
with Building Regulations, The Building Standards
(Scotland) Regulations 1990, The Building Regulations
(Northern Ireland), UK Water Regulations and IEE
Electrical Regulations.
1.2 Symbols used
In these instructions, various risk levels are employed
to draw the user’s attention to particular information. In
doing so we wish to safeguard the user, avoid hazards
and guarantee the correct operation of the appliance.
DANGER
Risk of a dangerous situation causing serious
physical injury.
WARNING
Risk of a dangerous situation causing slight
physical injury.
CAUTION
Risk of material damage.
 Signals important information.
1.3 Abbreviations
DHW - Domestic Hot Water
LCD - Liquid Crystal Display
BMS - Building Management System
PCB - Printed Circuit Board
1.4 HWA Charter
The HWA Charter Code of Practice requires that, all
members adhere to the following:
`To supply t for purpose products clearly and
honestly described
`To supply products that meet, or exceed appropriate
standards and building and water regulations
`To provide pre and post sales technical support
`To provide clear and concise warranty details to
customers
1.5 Tools required
M5 security screw:
Torx Tamper Proof T25 bit
Used on base and sensor covers
M8 security screw:
Torx Tamper Proof T40 bit
Used on external brackets
M5
(Security)
M8
(Security)

4
1.6 Liabilities
Manufacturers liability
Our products are manufactured in compliance with
the requirements of the various applicable European
Directives.
This appliance complies with the requirements of the
CE marking directive and is Kiwa approved to show
compliance with Water and Building Regulations and
Nemko approved for electrical safety. In the interest of
customers, we try continually to improved product
quality.
All the specifications stated in this document are
therefore subject to change without notice. Our
liability as the manufacturer may not be invoked in the
following cases:
`Failure to abide by the instructions when using the
appliance.
`Faulty or insufcient maintenance of the appliance.
`Failure to abide by the instructions when installing
the product.
Installer's liability
The installer is responsible for the installation and the
commissioning of the appliance. The installer must
adhere to the following instructions:
`Read and follow the instructions given in the
manuals provided with the appliance.
`Carry out installation in compliance with the
prevailing legislation and standards.
`Perform the initial start up and carry out any
necessary checks.
`Complete the commissioning checklist.
`Explain the installation to the user.
`If maintenance is necessary, warn the user of the
obligation to check the appliance and maintain it in
good working order.
`Give all the instruction manuals to the user.
Users liability
To guarantee optimum operation of the appliance, the
user must adhere to the following instructions:
`Read and follow the instructions given in the
manuals provided with the appliance.
`Call on qualied professionals to carry out
installation and initial start up.
`Ask the installer to explain your installation to you.
`Have the required checks and services done.
`Keep the instruction manuals in good condition and
close to the appliance.
This appliance can be used by children aged from 8 years and above and persons with
reducedphysicalsensoryormental capabilities
or lack of experience and knowledge if they
have been given supervision or instruction
concerning use of the appliance in a safe
way and understand the hazards involved.
Children shall not play with the appliance.
Cleaning and user maintenance shall not be
made by children without supervision.
Children must be supervised to ensure they
do not play with the appliance.
1.7 Benchmark
It is a requirement that the water heater is installed
and commissioned to the manufacturers instructions
and the data elds on the commissioning checklist
completed in full.
To instigate the warranty the vented water heater
needs to be registered with the manufacturer within
one month of the installation.
To maintain the warranty it is essential that the vented
water heater is serviced annually by a registered
engineer. The service details should be recorded on
the Benchmark Service Interval Record and left with
the owner/tenant of the property/building.
Visit: www.centralheating.co.uk for more information.
Heating and Hot Water Industry Council (HHIC)

5
2. Safety
2.1 General safety warnings
2.2 Recommendations
`Regularly check the water pressure in the
installation (minimum dynamic pressure 0.5 bar,
recommended pressure between 1 and 2 bar).
`Keep the product accessible at all times
`Never remove cover labels and rating plates afxed
to the appliance.
A means for disconnecting the power supply must be
incorporated in the xed wiring in accordance with the
latest version of BS 7671
Figure 1: Drain valve found in base of unit
2.3 Specic safety instructions
CAUTION
`Ensure the drain valve is covered
securely with the supplied cap to
ensure accidental use does not occur.
WARNING
`Only competent persons having
received the appropriate training are
permitted to work on the appliance and
the installation
`Do not tamper with any of the controls
supplied with the unit.
`Before any work, isolate the mains
electrical and water supplies to the
appliance.
DANGER
The hot water contained could lead to serious
physical injury if the safety instructions in this
manual are not adhered to.
WARNING
When handling the unit, take appropriate
precautions for the weight of the unit. Weights
can be found in section 3, table 1 page 6.
CAUTION
Annual maintenance is recommended by a
competent person.

6
3. Technical specications
3.1 Technical data
Product Name FBM 25 ECO 3KW FBM 45 ECO 3KW FBM 70 ECO 3KW FBM 120 ECO 3KW
Product Code 95040300 95040301 95040302 95040303
Electrical Rating 2.8kW at 230V
3.0kW at 240V
2.8kW at 230V
3.0kW at 240V
2.8kW at 230V
3.0kW at 240V
2.8kW at 230V
3.0kW at 240V
Maximum inlet pressure 1MPa (10bar)
(145psi)
1MPa (10bar)
(145psi)
1MPa (10bar)
(145psi)
1MPa (10bar)
(145psi)
Weight Empty kg 15 20 35 40
Weight Full kg 40 65 105 160
Capacity (Litres) 25 45 70 120
Heat up time (minutes) 30 50 80 135
Fill time (minutes) 3.5 at 7L/min 4 at 7L/min 6 at 12L/min 10 at 12L/min
Table 1: Technical data
Table 2: Technical che
Technical parameters in accordance with European Commission regulations 814/2013 and 812/2013
Direct
Suppliers name or trade mark FBM ECO
Supplier’s model identier 25L (3kW) 45L (3kW) 70L (3kW) 120L (3kW)
Storage volume V in litres 25.0 45.0 70.0 120.0
Mixed water at 40 °C V40 in litres 35 60 95.7 165.6
The declared load prole S M M M
The water heating energy efciency class of the model B C C C
The water heating energy efciency in % 35.1 37.7 36.1 36.6
The annual electricity consumption in kWh 526 1362 1423 1403
Daily fuel consumption Qlec in kWh 2.48 6.31 6.67 6.55
Heat Loss 0.56 0.84 1.12 1.27
The thermostat temperature settings of the water heater,
as placed on the market by the supplier 60OC
Specic precautions that shall be taken when the water
heater is assembled, installed or maintained See pages 7 to 29

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3.2 Overall Dimensions
A
B
C
I
F
D
E
H
G
Item 25L 45L 70L 120L
A 830 882 1221 1021
B 510 609 609 660
C 380 425 425 457
D 74 76 76 76
E 204 245 245 396
F 235 276 276 429
G 180 220 220 362
H 148 188 188 325
I 415 463 463 562
Figure 2: General dimensions
Table 3: General dimensions

8
3.3 Circuit Diagrams
s
s
Inlet
pipe work 1
Inlet
pipe work 2
Outer
case
LCD control
P1 P3
1 2 3 4 5 6
H
N
W
L1
L2
L3
J5
J7
J11
Electronic control
L N
LCD screen
Thermistor
Solenoid
valve
Element
1
2
3
4
5
6
BMS status out -
BMS status out +
BMS heating on -
BMS heating on +
BMS heating off -
BMS heating off +
Figure 3: Circuit diagram
Upper level sensor
Lower level sensor
BMS terminal
block
Terminal block
Earth / ground
Thermal
cutout
Thermostat
1
2
3
4
5
6
7
8
9
10
1
2
3
4
In Line Filter

9
4. Description of the product
4.1 General description
These water heaters are a series of wall mounted units
that store and produce domestic hot water efciently.
These vented units (unpressurized) mount securely
to the wall. Where required additional pressure safety
components may be added.
There are four models in the range:
`FBM 25 ECO
`FBM 45 ECO
`FBM 70 ECO
`FBM 120 ECO
The unit is supplied complete with safety and control
devices needed to allow connection to the cold water
supply where the pressure is below 10 bar. All these
components are preset and should not be tampered
with. The units' hot and cold pipes are situated so as
to provide ease of installation. The unit also has a
breather connection at the top that provides a visual
indication, via the tundish supplied, of overlling should
the unit fail. This must be vented to a suitable and safe
location, preferably an outside wall.
4.2 Operation principle
All the unit sizes produce DHW in the same way, by
heating the potable water volume via an immersion
heater. The hot water temperature programmed in the
unit is factory set to 60 degrees centigrade, but can
be adjusted to suit the installation requirements via the
digital interface panel.
4.2.1 Temperature Control
The temperature of the stored water can be adjusted
between 38 degrees centigrade and 78 degrees
centigrade, this is achieved by selecting manual
mode on the digital interface and then selecting the
temperature required using the temperature buttons,
up and down as shown on page 20.
4.2.2 Water inlet control
When hot water is drawn from the water heater, the unit
will detect a change in water level automatically and
request rell via a solenoid valve. The ow of potable
water is controlled via a ow restrictor, this ensures that
1
13 12 11 10
2
3
4
5
6
7
8
9
14
15
16
17
Number Part description
1 Product bracket
2 Breather gasket
3 Level sensor assembly
4 Sensor cover
5 Tank assembly
6 LCD screen cover
7 LCD board and display
8 Main electronic control
9 Base cover
10 22mm hot outlet pipe
11 15mm water inlet (push t elbow)
12 Fixing bracket
13 Drain valve
14 Power cable clamp assembly
15 Inlet assembly
16 Immersion heater
17 Wall bracket
Figure 4: Main components diagram
Table 4: Main components list

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the heater returns to the correct level in a controlled
manner.
4.2.3 Electronic Control
All heater functionality is controlled electronically which
allows the following additional features to be supported:
`Automatic Water Level Control
`Digital temperature readout display using a Liquid
Crystal Display, LCD
`Real-time user access to the heater for setup and
adjustment
`Automatic Pasteurization Control
`Error Indication using the LCD
`Building Management System (BMS), interface
allowing remote connectivity to the heater through
volts free connections.
4.2.3.1 Water Level
In normal operation the water heater manages the
level of the stored water inside the unit automatically,
maintaining the correct level and ensuring optimum
performance from the heater. In the unlikely event of a
system failure, the heater has safety features to ensure
that it shuts down in a safe manner, see troubleshooting
section on page 26.
4.2.3.2 User Interface
An LCD display is tted to the water heater to provide
real time indication of the stored water temperature
inside the unit. In addition, the user interface provides
a visual indication of ‘power on’ and ‘heater on’ via two
red indicators.
The Power On light indicates that mains, 230V ac
power is applied to the unit and that care should be
taken. However this is not proof of isolation, see page
5 for more safety information.
Heater On indicates that the immersion heater is
turned on and will heat the stored water to the required
set point. In addition the user interface has two control
buttons, these allow the heater to be put into manual
mode and the stored water set point to be adjusted to
the required level, see temperature adjustment section
on page 20. This user interface provides the end user,
support engineer or commissioning engineer with a
clear visual indication of the heater status and allows
adjustment of the water temperature set point. The LCD
provides additional information, see section 4.2.3.4.
4.2.3.3 Auto Pasteurization
WARNING
`The stored water temperature during
this function exceeds that which is
safe for hand wash requirements, if
the stored hot water is used for hand
washing then an appropriate water
tempering device must be tted at the
point of use.
WARNING
`With the addition of this feature,
the obligation to control Legionella
under the provisions laid down by L8,
Legionnaires’ disease: The control
of legionella bacteria water systems.
Approved Code of Practice and
guidance, within the hot water supply
network pipe work are not negated. It is
still the responsibility of the end user or
contracted support agency to manage
this requirement.
The water heater will automatically heat the stored water
temperature to 60°C for one hour should the stored
water set point temperature be inadvertently set to 55°C
or less for a period of 23 hours. This pasteurization
function ensures that the risk of developing Legionella
within the water heater is minimized.
4.2.3.4 Fault Condition Indication
In the unlikely event that a fault with the water heater
develops an error code is displayed in the LCD display.
This is intended to aid fault analysis and helps to reduce
the heater downtime whilst the fault is analysed. See
the troubleshooting section of this document for further
information. One of six error codes will be displayed in
the LCD should a fault develop, see page 27.
4.2.3.5 Building Management
The water heater has electronic hardware that will
allow the unit to interface with Building Management
Systems that are hard wired.
 Interconnection with wireless systems is not
possible.
Supplied with the heater is a six way terminal block that
will allow the heater to be hard wired to the Building
Management System through a ‘Volts Free’ connection.
See the heater wiring diagram for wiring connections
on page 8. The interface will allow two input signals to
control the immersion heater to turn it remotely either
on or off and an output signal line providing status of
the heater, fully operational or in fault condition.
4.3 Standard delivery
The units are supplied to site in one package. Within
the box there will be a set of tting instructions wall
mounting and xing brackets, heater assembly and
breather pipe assembly.

11
5. Before installation
5.1 Installation regulations
5.2 Installation requirements
The unit should not be used in association with any of
the following:
`Water supplies that have either inadequate
pressure or where the supply may be intermittent.
(Minimum dynamic pressure 0.5 bar).
`In areas where the water consistently contains a
high proportion of solids, e.g. suspended matter
that could block the strainer, unless adequate
ltration can be ensured.
`In areas where the water supply contains chloride
levels that exceed 250mg/L.
For information or advice regarding any of the above
contact Technical Enquiries on: 0344 871 1535.
 The unit can be connected directly to the water
supply source provided that a minimum dynamic pressure
of 0.5 bar and maximum pressure of 10 bar. If the measured
inlet pressure exceeds this value then a pressure reducing
valve must be tted, this is available through Heatrae
Sadia's supply partners.
5.3 Transport and storage
If the unit has to be stored prior to installation, it must be
in a secure area free from frost, excessive dampness
and humidity.
5.4 Choice of location
The unit must be vertically wall mounted and the
following points should be considered:
The unit should be sited to ensure minimum dead leg
distances, particularly to the point of most frequent use.
However there should be a minimum height between
the hot water outlet and the highest draw off point,
outlet tap, of 1.2 meters.
Avoid installations where extreme cold temperatures
will be experienced. All exposed pipe work should be
insulated.
The breather pipe work from the top of the unit should
have a continuous fall, and ideally vent to an outside
wall in a safe manner via the tundish supplied.
Access to associated controls must be available for the
servicing and maintenance of the system, the heater
requires access from the front and underside for this
purpose, refer to gure 6 page 12. Ensure that the wall
the unit is mounted on, is perpendicular and capable
of permanently supporting the weight when it is full of
water see Table 1 on page 6 for the unit weights.
5.5 Positioning and access
It is important that as much access available is
provided around the unit as is practical. In the event
of a component failure, full access to the front and
underside of the unit is required for servicing. A
minimum of 150mm above the top of the unit must be
kept clear for access, refer to gure 6, page 12.
Access to all isolation valves and control valves in the
water circuits, both hot and cold are also required for
normal operation and servicing.
WARNING
Installation of the appliance must be carried
out by a qualied engineer in accordance
with prevailing and national regulations as
listed below.
`Building Regulations
`The Building Standards (Scotland)
`The Building Regulations (Northern
Ireland)
`I.E.E Electrical Regs
`UK Water Regulations
WARNING
`In the unlikely event that water from the
unit should vent from this breather pipe
then the water could be at an excessive
temperature exceeding 95 degrees.
Therefore it is essential that the
breather pipe work selected is capable
of withstanding this temperature and
must have no obstruction and allow free
and safe passage for this hot water.
CAUTION
`Ensure that the unit is correctly
positioned. Consideration should
be given to the access and space
requirements for operating and
servicing the unit.
 The breather pipe assembly at the top can be
positioned on either the left or right.
Figure 5: Breather pipe assembly

12
Figure 6: Clearance diagram
10
10
150
1000
80 A80 10
B
250
10 C
FBM ECO 25L FBM ECO 45L FBM ECO 70L FBM ECO 120L
A510 609 609 660
B830 882 1221 1020
C235 275 275 429
Table 5: Clearance dimensions

13
150
B
250
C
6. Installation
6.1 General
After reading sections 1 - 5 in this booklet please
install the unit paying attention to the following water
connection, electrical and commissioning sections.
6.1.1 Siting of the unit
These water heaters are vented and can supply
multiple hot water outlets. The units must be mounted
higher than the taps they supply, refer to gure 7 below,
due to gravity supplied hot water.
Ideally the heater should be tted close to the point where
hot water is required. In order to present the minimum
resistance to ow we recommend that the outlet pipe
work be 22mm for as much of its length as possible.
Sufcient space around the water heater must be
provided for both installation and servicing, refer to
gure 6, page 12 for the clearance dimensions.
6.1.2 Water Connections
The unit is supplied with the following connections:
`Cold water inlet – 15mm push t connector
`Hot water outlet – 22mm open end pipe
`Breather pipe - 22mm open end pipe (Initial
Breather Pipe with tundish supplied in kit)
A full bore isolating valve must be inserted into the
15mm cold water inlet pipe work as close as is practical
to the water heater, this is to aid both the installation
and servicing of the unit during its service life.
Figure 7: Example of typical installation (not to scale)
Overow to safe and
suitable location
Cold feed
Hot outlet
Pressure reducing valve CT2
Thermostatic blending valve CT1
Service valve (needs to be full bore)
The unit must be a minimum of 1.2m
above highest outlet
WARNING
If the unit is being installed for a hand wash
only requirement then it is must be tted with
an appropriate low pressure blending valve
on the hot pipe work, close to the point of use
outlet. These available through the supply
partners found on the back page. This will allow
the water in the heater to be stored at a higher
temperature, water stored above 60°C not only
gives more usable blended hot water output,
it also considerably reduces the possibility of
harbouring bacteria

14
6.2 Wall xing
The units' wall mounting is provided by two brackets,
one supplied already tted to the water heater, the
second ‘wall bracket’ is provided within the kit.
The wall bracket has several mounting points. If the
water heater being installed is a direct replacement for
either an existing Heatrae Sadia FBM or Santon R Unit
of the same capacity, then the wall mounting points
used by these existing water heaters will align with the
corresponding mounting points on the new wall bracket
for the unit, see gure 8 and 9 below.
In addition to these mounting points the wall bracket has
additional holes that may align with those previously
used by the water heater being replaced, see tables 6
and 7 below.
 When tting the wall bracket ensure that the
xings used are suitable for the wall structure and the
weight of the water heater when full of water, see technical
data table 1 on page 6 of this instruction manual.
CAUTION
The wall bracket is supplied within the
packaging at the top.
A
B
C
D
Previous product t Dimension
AFBM 25L 445
BOTHER 320
CR UNIT 25L 307
DOTHER 400
 There are two types of main brackets, one which
only ts the 25L unit and another which ts all the larger
sizes.
A
B
C
D
Previous product t Dimension
AFBM 50, FBM 75 AND OTHER* 445 (450)*
BR UNIT 45L, 70L and 115L 410
COTHER 530
DFBM 125L 565
Table 7: 45L, 70L and 120L bracket hole dimensions
Figure 8: 25L wall bracket
Table 6: 25L unit bracket hole dimensions
Figure 9: 45L, 70L and 120L wall bracket

15
6.2.1 Wall xing procedure top bracket
If the unit being tted is a direct replacement for an
existing Heatrae or Santon product of the same
capacity then as stated in section 6.2 the existing
wall xing points can be used, provided that they are
suitable for the weight of the water heater being tted
when full of water, see table 1, page 6. If the water
heater is being tted for the rst time then follow the
procedure detailed below.
6.2.2 Wall xing procedure bottom bracket
`Supplied with the water heater as part of the kit is
Table 8: Fixing bracket dimension to bottom of unit
a xing bracket with two screws and shake proof
washers. The xing bracket is required to be tted
to the water heater. Lay the water heater down on a
at surface, face down, ensuring that the heater is
protected from any potential damage. Remove the
bracket, screws and washers from the packaging
and t the bracket to back of the water heater as
shown.
Figure 11: Fixing bracket assembly at bottom of unit
M8
x2
(Security)
`Carefully stand the water heater upright, taking
care not to damage the unit.
WARNING
Be aware that with the xing bracket
attached the water heater will not sit at
to the oor and therefore will be unstable.
Care must be taken not to allow the heater
to topple over.
`Refer to table 1, page 6 for the weight of the water
heater empty, using an appropriate lifting method
lift the water heater up and position the bottom
edge of the water heater bracket over the top edge
of the wall bracket, position the unit towards the
wall and then lower, see gure 12, page 16.
CAUTION
Please note that the water heater bracket
has a location spigot that sits lower than
the visual edge. This needs to be taken
into consideration when positioning the unit
above the wall bracket.
A
Product Size 25L 45L 70L 120L
Dimension A 621 679 1015 806
Figure 10: Fixing bracket dimension to bottom of unit
`Mark the position of the bottom edge of the heater
ensuring that this position is a minimum of 1.2
meters above the highest draw off point see gure
7, page 13.
`Mark the position of the centre line for the wall
bracket mounting holes and mark the centre points
for the xings, see gure 10 for position.
`Drill appropriate holes for the xings
`Secure the wall bracket to the wall using suitable
xings, ensuring that it is secure.
WARNING
Before drilling ensure there are no services
in the immediate area within the wall
structure

16
Figure 12: Bracket lifting procedure
1
2
Figure 13: Top bracket locating procedure
`Once the water heater is located correctly on the
wall bracket, slide either left or right to locate the
spigot in the slot, see gure 13 above.
`Using an appropriate xing, secure the water
heater to the wall with the xing bracket at the
bottom of the heater.
WARNING
All pipe work must be installed by a
competent Installer and must comply with
the following.
3
6.3 Water connections
WARNING
A minimum dynamic pressure of 0.5 bar and
maximum pressure of 10 bar is required. If
the measured inlet pressure exceeds this
value then a pressure reducing valve must be
tted, this is available through Heatrae Sadia's
supply partners.
`The appropriate Water Supply (Water Fittings)
Regulations 1999, Water Byelaws 2000 Scotland
and the Water regulations Northern Ireland must
be adhered to.
`The above regulations require the following;
`A servicing valve shall be installed on the inlet pipe
Schedule 2 - Section 16(2).
`A servicing valve shall be installed on the outlet
pipe Schedule 2 - Section 16(3).
`All ttings used must be WRAS approved
6.3.1 Water (Inlet)
 Each installation can differ in requirement see
gure 7, page 13 for a typical installation.
`Before work commences ensure the water supply
is isolated at the main stopcock.
`Ensure that an isolating valve is inserted into the
inlet feed pipe as close as is practical to the water
heater.
`Connect the inlet feed pipe to the 15mm inlet push
t connector on the underside of the water heater,
see gure 4, page 9.
WARNING
If this unit is cistern fed there needs to be a
minimum of 5m from the cistern to the top
of the unit, to ensure a dynamic pressure
of 0.5 bar.
CAUTION
Do not use a solder tting as this will
invalidate the unit warranty
WARNING
Do not use chrome or stainless steel pipe
work on push ttings on this unit.

17
WARNING
This appliance must be earthed.
WARNING
The water heater must be connected to
a 230/240V a.c. electrical supply using a
double pole isolating switch fused at 13A,
with a minimum 3mm contact separation
in both poles. The supply cable must be 3
core and each core must have a minimum
cross sectional area of 1.5mm2.
6.3.2 Hot Water Outlet
`An open ended 22mm pipe is provided at the
bottom of the water heater for connection of the
hot water outlet. Using a compression tting to
connect the outlet pipe to the hot water feed to
the service points. Ensure that a full bore isolating
valve is installed in this outlet pipe work as close to
the water heater as practical.
6.3.3 Breather Pipe
The water heater is provided with a breather pipe
assembly which consists of a short section of 15mm
pipe with a Tundish tted at one end and a push t 90
degree reducer at the other end.
`Push this assembly onto the 22mm pipe at the top
of the water heater. This assembly is designed
to swivel either to the left or the right of the unit.
Decide which side is to be used for the location
of the breather pipe. This pipe must be laid in a
continuous fall and terminate to a safe and visible
location. If a breather pipe already exists move the
assembly to the correct side of the water heater.
`Once installed connect the breather pipe to the
22mm compression tting on the Tundish, ensure
connection is tight, secure all pipe work in the
appropriate manner.
6.4 Electrical Installation
WARNING
It is suitable for A.C. supply only.
WARNING
Electrical installation must be carried
out by a competent electrician and be in
accordance with the latest I.E.E wiring
regulations, ensure the electrical supply is
switched off before making any connections
to the unit.
`Using an appropriate tool, remove the bottom
access panel, retain the screws and panel, place
in a safe location.
`The supply cable must be routed through the cable
entry point at the bottom of the heater and must be
fed through the cable grip provided with the outer
sheath of the cable rmly secured by tightening the
screws on the cable grip in accordance with the
latest version of BS 7671
`The cores of the supply cable must be connected
to the terminal block provided, in the following
manner ensuring that each connection is tight:
Earth (coloured green/yellow or green) to Earth
Terminal E
Neutral (coloured blue or black) to termination marked
N.
Live (coloured brown or red) to termination marked L.
If twin and earth cable is used the bare Earth
conductor must be sleeved.
6.4.1 Building Management System Installation
`To connect the unit to a Building Management
System refer to the electrical wiring diagram in
section 3.3, gure 3, page 8 and Figure 14 below.
The BMS specication to operate the unit remotely
is as follows:
Provide a +5V (10mA) supply supplied from the BMS
interface to the positive (+) connection with respect to (wrt)
the negative (-) connection.
Alternatively provide a +12V (24mA) supply via the BMS
interface to (+) connection (wrt) (-) connection.
Figure 14: BMS Wiring
CAUTION
Do not use a solder tting
1
2
3
4
5
6
CAUTION
Inclusion of a non return valve and or a
pressure reducing valve may be required
when using a mixer tap to prevent back ow.

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7. Commissioning
7.1 General
After the initial installation is complete instigate the
following commission process.
7.2 Checklist before commissioning
`Turn the water supply back on and then the installed
water inlet isolation valve.
`Perform a pipe work ush
`Check the inlet water connections for leaks and
rectify as necessary.
`Check all other pipe work is installed correctly, see
section 6.3, page 16.
`Turn the hot outlet isolation valve on.
`Open a hot tap at the point of use
`Check all wiring is correct and connections are
secure in the terminals.
`Check that all pipe work has been earth bonded.
`Ensure the power supply to the water heater is
switched on at source.
WARNING
The water heater cannot be lled with
water without power applied, therefore it
is essential that the following checklist is
completed.
7.3 Commissioning procedure
`Switch on the power to the water heater at the
fused spur
`Ensure the water heater has powered up by
looking at the display, a temperature value will be
displayed in the LCD window and the red "Power
On" light will be lit.
`After approximately 10 seconds the heater will
switch the solenoid valve on and allow water to
ow into the heater. If this does not happen refer to
section 10, page 26, Troubleshooting.
`Check all pipe work and the water heater for leaks
during the water ll process.
`Close the hot water tap once water starts owing.
`Once water has reached the correct level in the
tank, the solenoid will automatically switch off.
WARNING
If during the following commissioning
process an error is indicated on the display
then refer to the troubleshooting section for
analysis, section 10, page 26.
`The water heater will now turn on the immersion
heater automatically. See section 3, page 6
Technical Specication for the heat up time.
 During this initial commission cycle only, the water
heater will raise the temperature automatically to 60oC,
this will pasteurize the water heater.
`During the ll cycle and the water heat up cycle,
check that no error code has been displayed, if no
error code is displayed then the water heater is
now ready for use.
`To set the desired set point temperature refer to
section 8, page 20.
WARNING
If this does not happen and the water
heater continues to ll and water is seen in
the Tundish, turn off the water supply and
the electrical power immediately, refer to
section 10, troubleshoot page 26.

19
8. Operation
8.1 General
 Please note that this product has been
designed to make the operation of the unit and its
subsequent generation of hot water as simple for the
end user as possible. The factory settings that the unit
is delivered with are suitable for most installations.
8.2 Benchmark
The unit is covered by the Benchmark Scheme, which
aims to improve the standards of installation and
commissioning of domestic heating and hot water
systems in the UK and to encourage regular servicing
to optimise safety, efciency and performance.
Benchmark is managed and promoted by the Heating
and Hot Water Industry Council. For more information
visit www.centralheating.co.uk.
This product should be serviced regularly to optimise
its safety, efciency and performance. The service
engineer should complete the relevant Service Record
after each service. The unit must be serviced annually
by a competent engineer to maintain the warranty. The
Benchmark Checklist may be required in the event of
any warranty work.
8.3 Overview
`Refer to section 4, page 9, for an overview of the
product and a list of the main components.
`The heaters function is managed by a micro
controller on the control PCB, in addition the end
user interface is managed by the display PCB,
together they form the heater controller.
DANGER
Always disconnect the electrical supply
before opening the cover.
Auto Mode
`When the water heater is in auto mode the display
will show the current temperature of the water in
the tank.
O
C
Figure 15: Auto mode display example
Manual Mode
`When the water heater is in manual mode the
display will ash and show the current set point
temperature of the water in the tank. In manual
mode the set point temperature can be changed.
O
C
Figure 16: Manual mode display example
Auto pasteurization
`During auto pasteurization the display will be as
above, indicating a Legionella Cycle for the water
heater only
O
C
Figure 17: Auto pasteurization display example
8.4 Displays and Function

20
CAUTION
The temperature set point is the thermostat
temperature and therefore may be lower
than the temperature at the top of the
tank where hot water is drawn off. That
water temperature will be at the set point
temperature + 2°C.
Error codes
`If a fault develops with the water heater during
its service an error code between E1 and E6 will
occur. For a full breakdown of the fault condition
refer to section 10, troubleshooting page 26.
O
C
DANGER
Setting the stored water temperature above
40°C will increase the risk of scalding, for
hand washing, it is essential that a suitable
low pressure water tempering valve is tted
in the hot water supply circuit. The installer
must ensure that this is carried out during
installation. As an end user, if you are
unsure about your installation then consult
a competent engineer before making any
changes.
`Press and hold the up and down arrows, for at
least 3 seconds. The heater will go in to manual
mode, this will be indicated by the LCD ashing.
`Press the up button to increase the temperature
and the down button to decrease the temperature.
`Each time the chosen button is pressed the set
temperature will rise or fall by 1°C, therefore
consecutive button presses may be required to
achieve the desired set point temperature.
`Once the desired temperature is reached, the water
heater display after a short time will stop ashing,
returning to auto mode and the new temperature
set point will be stored in its memory.
O
C
Figure 19: Temp adjustment display example
O
C
Figure 18: Error code display examples
8.5 Temperature adjustment
DANGER
Setting the stored water temperature below
55°C will trigger the auto pasteurization cycle
which will heat the water to 60°C after 23
hours. This cycle will repeat every 23 hours
whilst it is set below 55°C.