Heatrae Sadia Multipoint ECO 30L V 3kW User manual

Multipoint ECO Vertical 30 - 100 Litres
Installation, operation and maintenance manual
WARNING
This water heater must only be installed by qualied persons.
Please read and understand these instructions before starting work.
Please leave this leaet with the user following installation.

2
Contents
1. Introduction ...............................................................3
1.1 General ...................................................................3
1.2 Symbols used .........................................................3
1.3 Abbreviations ..........................................................3
1.4 Liabilities .................................................................3
2. Safety..........................................................................4
2.1 General safety warnings .........................................4
2.2 Recommendations .................................................4
2.3 Specic safety instructions .....................................4
3. Technical specications ...........................................5
3.1 Technical data ........................................................5
3.2 Dimensions and connections .................................6
3.3 Electrical diagram(s) ...............................................7
4. Description of the product .......................................8
4.1 General description ................................................8
4.2 Operation principle .................................................8
4.3 Main components ...................................................8
4.4 Standard delivery ...................................................8
4.5 Auto Pasteurisation.................................................8
5. Before installation .....................................................9
5.1 Installation regulations ............................................9
5.2 Installation requirements ........................................9
5.3 Choice of location ...................................................9
5.4 Transport ................................................................9
6. Installation .................................................................10
6.1 General ...................................................................10
6.2 Water connections ..................................................10
6.3 Electrical connections .............................................15
7. Commissioning .........................................................15
7.1 General ...................................................................15
7.2 Checklist before commissioning .............................15
7.3 Commissioning procedure ......................................15
8. Operation ...................................................................16
8.1 General ...................................................................16
9. Maintenance...............................................................24
9.1 General ...................................................................24
9.2 Standard inspection & maintenance operations .....24
9.3 Removal and replacement of the LCD display........26
10. Troubleshooting ......................................................27
10.1 Fault nding ..........................................................27
Benchmarktm places responsibilities on both manufacturers and installers. The purpose is to ensure that
customers are provided with the correct equipment for their needs, that it is installed, commissioned and
serviced in accordance with the manufacturer’s instructions by competent persons and that it meets the
requirements of the appropriate Building Regulations and relevant electrical qualications. The Benchmarktm
Checklist can be used to demonstrate compliance with Building Regulations and should be provided to the
customer for future reference. Installers are required to carry out installation, commissioning and servicing
work in accordance with the Benchmarktm Code of Practice which is available from the Heating and Hotwater
Industry Council who manage and promote the Scheme. Visit www.centralheating.co.uk for more information.
IMPORTANT NOTE TO USER: PLEASE REFER TO THE COMMISSIONING SECTION, PAGE 16 FOR
IMPORTANT INFORMATION WITH RESPECT TO THE BENCHMARK SCHEME
10.2 Error Codes...........................................................28
11. Warranty ...................................................................29
11.1 General .................................................................29
11.2 Warranty conditions ..............................................29
11.3 Water supply requirements ...................................29
11.4 Claims under warranty ..........................................29
11.5 Exclusions ............................................................29
12. Decommissioning ...................................................30
12.1 Decommissioning procedure ................................30
13. Spare parts...............................................................31
13.1 Spare parts list .....................................................32

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 Part G and L
`The Building Standards (Scotland) Regulations
`The Building Regulations (Northern Ireland)
`I.E.E Wiring Regulations
`UK Water 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 dangerous situation causing slight
physical injury.
CAUTION
Risk of material damage.
 Signals important information.
1.3 Abbreviations
`T&P - Temperature & Pressure relief valve
`PRV - Pressure Reducing Valve
`Prv - Pressure relief valve
1.4 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 Building Regulations (Part G, section
G3).
In the interest of UK customers, we are continuously
endeavouring to make improvements in product
quality. All the specications 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 for using the
appliance.
`Faulty or insufcient maintenance of the
appliance.
`Failure to abide by the instructions for installing the
product.
Installer's liability
The installer is responsible for the installation and the
commissioning of the appliance. The installer must
respect the following instructions:
`Read and follow the instructions given in the
manual provided with the appliance.
`Carry out installation in compliance with the
prevailing legislation and standards.
`Perform the initial start up and carry out any checks
necessary.
`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 the instruction manual to the user.
`Complete the warranty registration card.
Users liability
To guarantee optimum operation of the appliance, the
user must respect the following instructions:
`Read and follow the instructions given in the
manual provided with the appliance.
`Call on qualied professionals to carry out
installation and initial start up.
`Ask your installer to explain your installation to you.
`Have your required checks and services done.
`Keep the instruction manuals in good condition and
available for future reference.
This appliance can be used by children aged from 8 years and above and persons with
reduced physical sensory or mental capabilities
or lack of experience and knowledge if they
have been given supervison 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.
Water may drip from the discharge pipe of the pressure-relief device and this pipe
must be left open to the atmosphere; (see
page 14 for more details)
10.2 Error Codes...........................................................28
11. Warranty ...................................................................29
11.1 General .................................................................29
11.2 Warranty conditions ..............................................29
11.3 Water supply requirements ...................................29
11.4 Claims under warranty ..........................................29
11.5 Exclusions ............................................................29
12. Decommissioning ...................................................30
12.1 Decommissioning procedure ................................30
13. Spare parts...............................................................31
13.1 Spare parts list .....................................................32

4
2. Safety
2.1 General safety warnings
DANGER
This appliance is unvented and as such
becomes pressurised when in operation.
The combination of pressurisation and hot
water could lead to serious physical injury if
the safety instructions in this manual are not
WARNING
`Only competent persons having
received adequate training are
permitted to work on the appliance and
the installation.
`Do not tamper with any of the safety
valves or controls supplied with the
appliance.
`Before any work, isolate the mains
electricity supply to the appliance.
CAUTION
Do not operate the immersion heater until the
appliance has been lled with water.
The temperature/pressure-relief device is to
be operated regularly to remove lime deposits
and to verify that it is not blocked; (see page
25 for more details)
How hot water can be drained. (see page 24
for more details)
The type or characteristics of the pressure
reducing device and how to connect it; (see
Figure 9, page 24 for exploded view)
A discharge pipe connected to the temperature/
pressure-relief device is to be installed in a
continuously downward direction and in frost
free environment; (see page 14 for details)
Recommended minimum water pressure 0.08
MPa (0.8 bar). Max water pressure1.6 MPa (16
bar) see table 1 page 5.
If the supply cord is damaged, it must be
replaced by the manufacturer, its service agent
or simularly qualied persons in order to avoid
a hazard.
2.2 Recommendations
WARNING
When handling the unit, take appropriate
precautions for the weight of the unit. Weights
can be found in table 1, p5.
CAUTION
Annual maintenance is essential to ensure the
performance of the water heater and should
to be carried out by a competent person, see
section 9, page 25.
2.3 Specic safety instructions
WARNING
`If water discharges from the
Temperature/Pressure Relief Valve
on the appliance, isolate the electicity
supply to the appliance. DO NOT
turn off any water supply. Contact a
competent installer for unvented water
heaters to check the system.
`DO NOT tamper with any of the safety
valves tted to the system. If a fault
is suspected contact a competent
installer.
`DO NOT bypass the thermal cut-out in
any circumstances.
WARNING
`This appliance is supplied with a
factory tted electronic thermostat
which provides automatic control
of legionella in accordance with the
"Approved Code of Practice L8:
`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.
CAUTION
This appliance contains components that are
sensitive to Electrostatic Discharge.
To prevent damage to these components wear
ESD wrist strap when servicing this appliance.

5
3. Technical specications
3.1 Technical data
Product Name Multipoint ECO
30L V 3kW
Multipoint ECO
50L V 3kW
Multipoint ECO
80L V 3kW
Multipoint ECO
100L V 3kW
Product Code 7693979 7693981 7693983 7694025
Electrical rating 3.0kW @ 240V ~ / 2.8kW @ 230V ~
Max Inlet Pressure to PRV 1.6 MPa (16.0 bar)
Weight Empty kg 14 21 26 30
Weight Full kg 44 71 106 130
Capacity (Litres) 30 50 80 100
Heat up time (min) 37 65 115 125
Operating pressure 0.35 MPa (3.5 bar)
Maximum Design (Rated) pressure 0.6 MPa (6.0 bar)
Minimum supply pressure 0.08 MPa (0.8 bar)
Expansion vessel charge pressure 0.35 MPa (3.5 bar)
Expansion relief valve setting 0.6 MPa (6.0 bar)
Temperature/Pressure Relief Valve
settings 90oC / 1.0MPa (10 bar)
T&P Relief Valve Part No. 95605084
Insulation thickness (min) 22mm 22mm 36mm 36mm
Product Name Multipoint ECO
30L V 3kW
Multipoint ECO
50L V 3kW
Multipoint ECO
80L V 3kW
Multipoint ECO
100L V 3kW
Suppliers name or trade mark Multipoint ECO
Supplier’s model identier 30L V 3kW 50L V 3kW 80L V 3kW 100L V 3kW
Storage volume V in litres 30 50 80 100
Mixed water at 40 °C V40 in litres 51 83 132 162
The declared load prole S M M M
The water heating energy efciency
class of the model AB B C
The water heating energy efciency in
%39.78 39.94 39.9 38.0
The annual electricity consumption in
kWh 464 1285 1287 1350
Daily fuel consumption Qelec in kWh 2.39 6.42 6.41 6.24
Heat Loss kWh/24h 0.48 0.69 0.82 0.93
The thermostat temperature settings
of the water heater, as placed on the
market by the supplier
70°C
Table 1: Technical data
Table 2: Technical che

6
Specic pecautions that shall be taken
when the water heater is assembled,
installed or maintained and disposed
of at end of life.
See pages 3 to 21
Technical parameters in accordance with European Commission regulations 814/2013 and 812/2013
Figure 1: General dimensions
Table 3: General dimensions table
B
A1
D
F
C
L
K
G
E
A2
H I
J

7
3.2 Dimensions and connections
Figure 2: Wiring Diagram
L
N
E
T1
Electronic Control
(IBD 12003 Controller)
1
7
5
6
3
4
2
N
W2
W1
1
7
5
6
3
4
2
2
1
CON1
SMART Controller
(IFG90007)
Ribbon Cable
(ICB00005)
HE1 W6
HE2 W4
HE2 W5
HE1 W3
Not Used
Outer Case
Power On
Indicator
(Neon)
Heating
Element
J1
L
Thermostat

8
4. Description of the product
4.1 General description
This appliance is a purpose designed unvented
water heater. The water heater has a stainless steel
inner vessel, which ensures an excellent standard of
corrosion resistance. The outer casing is a combination
of resilient thermoplastic mouldings and coated
corrosion proofed steel sheet. All products are insulated
with CFC free polyurethane foam to give good heat
loss protection.
The appliance is supplied complete with all the
necessary safety and control devices needed to
allow connection to the cold water mains. All these
components are preset and should not be tampered
with.
4.2 Operation principle
The appliance is used to heat and store hot water for
use in domestic & commercial applications.
The water is heated directly using a factory tted
electric heating element and thermostatically controlled
by a SMART electronic thermostat.
This water heater is unvented, to provide pressure to
the tap or shower an unvented water heater uses the
incoming mains water pressure. To protect the water
heater from the risks of over pressure from the incoming
mains pressure and expansion of the heated water it
should be protected using the supplied water safety kit,
(See Figure 6, Page 11) for typical installation
4.3 Main components
See gure 3: Main components
4.4 Standard delivery
The delivery includes:
`Water heater
`Wall mounting brackets
`Literature pack
`Instructions
`Warranty card
`Cold water control pack
`Expansion vessel (inc bracket)
`Tundish
`Pressure reducing valve
`Expansion (Pressure) relief valve
`Check valve
`Compression nuts
`Copper olives
Please check all components are supplied in the
pack and advise your supplier if any are missing.
Figure 3: Main components
Table 4: Main components table
Item Description
1Temperature and Pressure Relief Valve
2Thermostat adjustment
3 Inlet
4 Wall Mounting Bracket (Lower)
5 Neon Indicator
6Outlet
1
2
3
64
5
4.5 Auto Pasteurisation
The appliance provides an automatic pasteurisation
feature. This feature will automatically heat the
internally stored hot water to 65°C once, then returns to
its previous mode of operation. This occurs if the stored
water remains below 60°C for greater than 21 days in
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.

9
5. Before installation
5.1 Installation regulations
5.2 Installation requirements
Water supply
In an unvented system the pressure and owrate are
directly related to the incoming water supply. For this
reason it is recommended that the maximum water
demand is assessed and the water supply checked to
ensure this demand can be satisfactorily met. Minimum
requirements are specied in Table 1 on page 5.
`We suggest the minimum supply requirements
should be 0.08MPa (0.8 bar) pressure and 20 litres
per minute ow rate. However, at these values
outlet ow rates may be poor if several outlets are
used simultaneously.
`A 22mm cold water supply is recommended,
however, if a 15mm (1/2”) supply exists, which
provides sufcient ow, this may be used (although
more ow noise may be experienced).
`The higher the available pressure and ow rate the
better the system performance.
`The appliance has a maximum operating pressure
of 0.35MPa (3.5 bar) which is controlled by the
Pressure Reducing Valve (PRV).
`The Pressure Reducing Valve can be connected
to a maximum mains pressure of 1.6MPa (16 bar).
Outlet/terminal ttings (taps, etc.)
`The water heater can be used with most types of
terminal ttings.
`Outlets situated higher than the appliance will give
outlet pressures lower than that at the heater, a
10m height difference will result in a 1 bar pressure
reduction at the outlet.
`All ttings, pipework and connections must have a
rated pressure of at least 0.6 Mpa (0.6 Mpa (6 bar))
at 80°C.
Limitations
The appliance should not be used in association with
any of the following:
`Ascending spray type bidets or any other class 1
back syphonage risk requiring that a type A air gap
be employed.
`Situations where maintenance is likely to be
neglected or safety devices tampered with.
`Water supplies that have either inadequate
pressure or where the supply may be intermittent.
`Situations where it is not possible to safely pipe
away any discharge from the safety valves.
`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.
5.3 Choice of location
The appliance must be vertically wall mounted.
Although location is not critical, the following points
should be considered:
`The appliance should be sited to ensure minimum
dead leg distances, particularly to the point of most
frequent use.
`Avoid siting where extreme cold temperatures will
be experienced. All exposed pipe work should be
insulated.
`The discharge pipework from the safety valves
must have minimum fall of 1:200 from the appliance
and terminate in a safe and visible position as per
G3 requirements.
`Access to associated controls and immersion
heaters must be available for the servicing and
maintenance of the system.
`Clearance above and below the water heater
should be at least 300 mm to allow removal of the
cover immersion heater at the bottom and the T&P
valve at the top.
`Ensure that the wall the appliance is to be mounted
on is capable of permanently supporting the weight
when full of water (see table 1, page 5 for weights).
`The tundish should be installed away from any
electrical components.
5.4 Transport
Prior to installation the appliance should be transported
and stored in an upright position in its orignal packaging
in a dry area free from excessive damp, humidity or
frost.
Please take care when handling a packaged appliance.
The units are heavy and must only be moved manually
using safe working practices. The package weights
are displayed on the carton label. Once the packaging
has been removed decide on a safe lifting method for
the appliance again taking note of the weights noted in
table 1, page 5. DO NOT use the Temperature/Pressure
Relief Valve to lift or manoeuvre the appliance.
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 G3
`The Building Standards (Scotland)
`The Building Regulations (Northern
Ireland)
`I.E.E Electrical Regulations
`UK Water Regulations

10
6. Installation
6.1 General
After reading the previous sections in this booklet and
choosing a suitable location for the appliance please
install, paying attention to the following water, electrical
and commissioning sections.
Mounting the water heater
The water heater should be mounted using the brackets
supplied following the steps stated below:
`The top bracket bolts will require mounting to the
unit. Note the location of the bolt holes used for
the vertical units as well as which way up the unit
should be mounted.
`The top bracket bolts should be screwed all the
way into the hole until they stop and stick out 8mm
as shown in gure 4 below.
`The bottom bracket will require mounting to the
casing as shown in gure 5 using the xings
supplied. This must be done before the appiance
is mounted on the wall
`Secure the top bracket to the wall using appropriate
xings. Ensure it is tted the correct way up.
`Locate the appliance top bracket bolts in the
corresponding slots in the wall bracket. Ensure
they are fully engaged and seat correctly (gure 4).
`Secure the bottom bracket to the wall.
6.2 Water connections
WARNING
`Under no circumstances should the
factory tted Temperature & Pressure
Relief valve be removed other than by
a competent person. To do so would
invalidate any warranty claim.
`The cold water controls supplied MUST
be tted on the mains cold water supply
to the appliance.
`No control or safety valves should be
tampered with or used for any other
purpose.
`The discharge pipe should not be
blocked or used for any other purpose.
`The tundish should not be located
adjacent to any electrical components
Refer to the installation schematic (gure 6, page 11)
for details on the pipework layout. Specic details for
the discharge pipework layout is also provided in gure
7 on page 14.
`The appliance is supplied with a Pressure
Reducing Valve, Check Valve, Expansion vessel
and Expansion (Pressure) Relief Valve.
`All pipe ttings are made via 22mm compression
ttings directly to the water heater. Fittings are
threaded 3/4”BSP male parallel.
`A stopcock or servicing valve must be incorporated
into the cold water supply to enable the appliance
and its associated controls to be isolated and
serviced. See Figure 6, page 11 for position.
`The expansion vessel must be connected between
the check valve and the appliance.
`The location of the expansion vessel should allow
access to recharge the pressure as and when
necessary.
`An expansion vessel wall mounting bracket is
Figure 4: Top Bracket
Figure 5: Bottom Bracket
8 ±1.5 mm
CAUTION
If this appliance is installed into a location
where the temperature of the air surrounding
(ambient) the water heater constantly exceeds
45oC, then additional ventilation should be
considered.

11
Figure 6: Typical installation - schematic (not to scale)
12
4
6
7
5
8
9
10
3 2
11
1
2
8
9 9
2
Item Description
1Cold Water Mains in
2Service Valve (not supplied)
3Pressure Reducing Valve
4 Balanced Cold Water Draw Off
5Check Valve
6Expansion Vessel
7Expansion (Pressure) Relief Valve
8 Tundish
9Drain Off Valve
10 Hot out
11 Water heater
12 Temperature and Pressure Relief Valve
Table 5: Typical installation table
supplied and should be tted.
`A suitable drain off valve should be installed in the
cold water supply to the appliance between the
Expansion Valve and the appliance at as low a
level as possible.
`It is recommended that the outlet point of the drain
pipework be at least 1 metre below the level of the
base of the appliance (this can be achieved by
attaching a hose to the drain off valve spigot).
`Hot water distribution pipework should be 22mm
pipe with short runs of 15mm pipe to terminal
ttings such as sinks and basins. Pipe sizes may
vary due to system design.

12
Discharge
It is a requirement of Building Regulation G3 that any
discharge from an unvented system is conveyed to
where it is visible, but will not cause danger to persons in
or about the building. The tundish and discharge pipes
should be tted in accordance with the requirements
and guidance notes of Building Regulation G3. The G3
Requirements and Guidance section 3.50 - 3.63 are
reproduced in the following sections of this manual.
For discharge pipe arrangements not covered by G3
Guidance advice should be sought from your local
Building Control Ofcer. Any discharge pipe connected
to the pressure relief devices (expansion valve and
temperature/pressure relief valve) must be installed in
a continuously downward direction and in a frost free
environment.
Water may drip from the discharge pipe of the pressure
relief device. This pipe must be left open to the
atmosphere. The temperature/pressure relief device is
to be operated regularly to remove lime deposits and to
verify that it is not blocked.
G3 REQUIREMENT
“...there shall be precautions...to ensure that the
hot water discharged from safety devices is safely
conveyed to where it is visible but will not cause danger
to persons in or about the building.”
The following extract is taken from the latest G3
Regulations
Discharge pipes from safety devices
Discharge pipe D1
3.50 Each of the temperature relief valves or combined
temperature and pressure relief valves specied in
3.13 or 3.17 should discharge either directly or by way
of a manifold via a short length of metal pipe (D1) to a
tundish.
3.51 The diameter of discharge pipe (D1) should be
not less than the nominal outlet size of the temperature
relief valve.
3.52 Where a manifold is used it should be sized to
accept and discharge the total discharge from the
discharge pipes connected to it.
3.53 Where valves other than the temperature and
pressure relief valve from a single unvented hot water
system discharge by way of the same manifold that
is used by the safety devices, the manifold should be
factory tted as part of the hot water storage system
water heater or package.
Tundish
3.54 The tundish should be vertical, located in the
same space as the unvented hot water storage system
and be tted as close as possible to, and lower than,
the valve, with no more than 600mm of pipe between
the valve outlet and the tundish (see Fig 7).
Note: To comply with the Water Supply (Water Fittings)
Regulations, the tundish should incorporate a suitable
air gap.
3.55 Any discharge should be visible at the tundish. In
addition, where discharges from safety devices may
not be apparent, e.g. in dwellings occupied by people
with impaired vision or mobility, consideration should
be given to the installation of a suitable safety device
to warn when discharge takes place, e.g. electronically
operated.
Discharge pipe D2
3.56 The discharge pipe (D2) from the tundish should:
(a) have a vertical section of pipe at least 300mm
long below the tundish before any elbows or bends in
the pipework (see Fig. 7); and
(b) be installed with a continuous fall thereafter of at
least 1 in 200.
3.57 The discharge pipe (D2) should be made of:
(a) metal; or
(b) other material that has been demonstrated to be
capable of safely withstanding temperatures of the water
discharged and is clearly and permanently marked to
identify the product and performance standard (e.g. as
specied in the relevant part of BS 7291).
3.58 The discharge pipe (D2) should be at least one
pipe size larger than the nominal outlet size of the safety
device unless its total equivalent hydraulic resistance
exceeds that of a straight pipe 9m long, i.e. for discharge
pipes between 9m and 18m the equivalent resistance
length should be at least two sizes larger than the
nominal outlet size of the safety device; between 18
and 27m at least 3 sizes larger, and so on; bends must
be taken into account in calculating the ow resistance.
See Fig 11, Table 3 and the worked example.
Note: An alternative approach for sizing discharge
pipes would be to follow Annex D, section D.2 of BS
6700:2006 Specication for design, installation, testing
and maintenance of services supplying water for
domestic use within buildings and their curtilages.
3.59 Where a single common discharge pipe serves
more than one system, it should be at least one pipe
size larger than the largest individual discharge pipe
(D2) to be connected.
3.60 The discharge pipe should not be connected to a
soil discharge stack unless it can be demonstrated that
the soil discharge stack is capable of safely withstanding
temperatures of the water discharged, in which case, it
should:
(a) contain a mechanical seal, not incorporating a
water trap, which allows water into the branch pipe
without allowing foul air from the drain to be ventilated

13
through the tundish;
(b) be a separate branch pipe with no sanitary
appliances connected to it;
(c) if plastic pipes are used as branch pipes carrying
discharge from a safety device they should be either
polybutylene (PB) to Class S of BS 7291-2:2006 or
cross linked polyethylene (PE-X) to Class S of BS
7291-3:2006; and
(d) be continuously marked with a warning that no
sanitary appliances should be connected to the pipe.
Note:
1. Plastic pipes should be joined and assembled with
ttings appropriate to the circumstances in which they
are used as set out in BS EN ISO 1043-1.
2. Where pipes cannot be connected to the stack it
may be possible to route a dedicated pipe alongside or
in close proximity to the discharge stack.
Termination of discharge pipe
3.61 The discharge pipe (D2) from the tundish should
terminate in a safe place where there is no risk to
persons in the vicinity of the discharge.
3.62 Examples of acceptable discharge arrangements
are:
(a) to a trapped gully with the end of the pipe below a
xed grating and above the water seal;
(b) downward discharges at low level; i.e. up to
100mm above external surfaces such as car parks,
hard standings, grassed areas etc. are acceptable
providing that a wire cage or similar guard is positioned
to prevent contact, whilst maintaining visibility; and
(c) discharges at high level: e.g. into a metal hopper
and metal downpipe with the end of the discharge pipe
clearly visible or onto a roof capable of withstanding
high temperature discharges of water and 3m from
any plastic guttering system that would collect such
discharges.
3.63 The discharge would consist of high temperature
water and steam. Asphalt, roong felt and non-
metallic rainwater goods may be damaged by such
discharges.
Worked example of discharge pipe sizing
Fig. 7: shows a G1/2 temperature relief valve with a
discharge pipe (D2) having 4 No. elbows and length of
7m from the tundish to the point of discharge.
From Table 6:
Maximum resistance allowed for a straight length of
22mm copper discharge pipe (D2) from a G1/2
temperature relief valve is 9.0m.
Subtract the resistance for 4 No. 22mm elbows at 0.8m
each = 3.2m
Therefore the permitted length equates to: 5.8m
5.8m is less than the actual length of 7m therefore
calculate the next largest size.
Maximum resistance allowed for a straight length of
28mm pipe (D2) from a G1/2 temperature relief valves
equates to 18m.
Subtract the resistance of 4 No. 28mm elbows at 1.0m
each = 4.0m
Therefore the maximum permitted length equates to:
14m
As the actual length is 7m, a 28mm (D2) copper pipe
will be satisfactory.

14
Valve
Outlet Size
Minimum Size Of
Discharge Pipe
D1
Minimum Size Of
Discharge Pipe D2
From Tundish
Maximum Resistance
Allowed, Expressed As A
Length Of Straight Pipe
(I.E. No Elbows Or Bends)
Resistance
Created By Each
Elbow Or Bend
G1/2 15mm
22mm
28mm
35mm
up to 9m
up to 18m
up to 27m
0.8m
1.0m
1.4m
G3/4 22mm
28mm
35mm
42mm
up to 9m
up to 18m
up to 27m
1.0m
1.4m
1.7m
G1 28mm
35mm
42mm
54mm
up to 9m
up to 18m
up to 27m
1.4m
1.7m
2.3m
Table 6: Sizing of copper discharge pipe (D2) for common temperature relief valve outlet sizes
Safety device
(e.g. Temperature
relief valve) Metal discharge pipe (D1) from
Temperature relief valve to tundish
Tundish
Discharge below
fixed grating
(Building Regulation
G3 section 3.61 gives
alternative points
of discharge)
Fixed grating
Trapped
gully
600mm maximum
300mm
minimum
Discharge pipe (D2) from tundish,
with continuous fall. See Building
Regulation G3 section 3.56,
Table 1 and worked example
Figure 7: Typical discharge pipe arrangement (extract from Building Regulation G3 Guidance Section 3.50)

15
6.3 Electrical connections
In case of difculty contact service support; contact
details are available on page 36 of this booklet.
WARNING
`Isolate the mains electrical supply
before removing any covers.
`Never attempt to replace the immersion
heater other than with the recommended
immersion heater.
`DO NOT bypass the thermal cut-out(s)
in any circumstances. Ensure the two
spade terminations on thermostat and
thermal cut-out are pushed rmly onto
the corresponding terminations on the
element plate assembly.
`All electrical wiring should be carried
out by a competent electrician and be in
accordance with the latest I.E.E Wiring
Regulations.
`Each circuit must be protected by a
suitable protection device and double
pole isolating switch with a contact
separation of at least 3mm in both
poles.
`DO NOT apply electrical power to the
water heater until the unit has been
lled with water.
`Check that the electrical supply is of sufcent
current rating and voltage.
`The length of ex supplied is 2 metres.
`The water heater will be pre-wired but will need
wiring into a fused switched spur.
`As the unit is pre-wired there should be no
requirement to open the electrical cover. Should
access be required (see Figure 10, page 26).
`The wires are colour coded as follows:
Green and Yellow EARTH
Brown LIVE (L)
Blue NEUTRAL (N)
7.1 General
WARNING
DO NOT apply electrical power to the water
heater until the unit has been lled with
water.
7.2 Checklist before commissioning
`Check that all installation and discharge pipe
requirements have been met.
`Check expansion vessel pre-charge pressure.
The vessel is supplied precharged to 0.35MPa
(3.5 bar) to match the control pressure of the
pressure reducing valve or should be matched to
the incoming cold water mains pressure. The pre-
charge pressure is checked using a car tyre gauge
by unscrewing the plastic cap opposite the water
connection.
`Open a hot tap furthest from the water heater and
turn on the water supply to the water heater.
`Allow water heater to ll and leave hot tap running
for a short while to purge any air and ush out the
pipework.
`Open successive hot taps to purge the system of
air.
`Check all water connections for leaks and rectify
as necessary.
`Turn off mains water supply and depressurise unit.
`Remove the pressure reducing valve head work to
access the strainer mesh, clean and re-t.
`Turn the water supply back on.
`Manually open, for a few seconds, each relief valve
in turn, checking that water is discharged and runs
freely through the tundish and out at the discharge
point.
`Ensure that the valve(s) reseat satisfactorily.
`Check all electrical connections are tight.
`Check all earth bonding links are connected, tight
and un-damaged.
`Check earth continuity, short circuits, polarity and
resistance to earth.
7.3 Commissioning procedure
`Switch on electrical supply to the water heater. You
will notice that the display and all options will light
up for a few seconds.
`After a few seconds the display will go into its
default S smart setting. The "°C" graphic will blink
while heating.
`In this default mode the temperature of the water is
automatically selected but will adjust based on the
usage patterns learnt.
`Please see section 8, Operation, page 16 for more
information on setting the water heater up.
7. Commissioning

16
S
8. Operation
8.1 General
WARNING
`If water discharges from the
temperature/pressure relief valve on
the cylinder shut down the heat source.
Do not turn off any water supply. Contact
a competent installer for unvented
water heaters to check the system.
`Do not tamper with any of the safety
valves tted to the system. If a fault
is suspected contact a competent
installer.
`DO NOT bypass the thermal cut-out(s)
in any circumstances.
This water heater is operated via a front mounted
control panel operated by four seperate buttons as
shown in gure 8 below
Item Description
1Mode selection and programming
2Selected mode - Smart, Manual, Vacation and Timer
3Temp up/level up
4Temp down/level down
52 digit display
6Program periods
7Validation and Boost
Table 7: User interface
Figure 8: User interface

17
Mode Selection
The selected mode or the set of the clock is validated by pressing the button
Smart Mode:
Manual Mode: Maintains the total volume of water at a temperature according to the selected temperature.
Vacation mode: Keeps the water temperature at a minimumlevel avoiding any water freezing.
Set Time Mode: To set the current time in hours and minutes.
Core
modes: to move from one mode to another or to set the clock, short press button.
Permanently monitors and learns hot water consumption habits and after a minimum of one
week learning period, automatically adjusts hot water production according to past recorded
consumptions. A minimum of hot water availability is guaranteed depending on the selected
l
level of comfort.
S
S
Installation
After installation of the water heater electrical power and water pipes have been connected, and after the tank is filled,
the installer can turn on the power. As soon as the power is on, all segments of the LCD display are set ON for a few
seconds.
After a few seconds of the test display, the unit goes in to mode, level 4. The blinks while the water is heating.
S
S

18
SMART Mode
°C
Temperature
(Min./ Max.)
L1
- - - +++ (45/60)
L2
- - ++ (45/63)
L3
+
(45/65)
L4
(45/70)
L5
++ - - (55/70)
S
-
The selected level is validated by pressing the key.
This mode offers the option to select different levels of energy saving and comfort. This level of comfort is selected by
using the or , and offers 5 different levels. Level setting activation is identified by a blinking level setting value.
Level Number Comfort Level Energy Saving Level
Balance
Default factory setting
Balance
Default factory setting
Manual Mode
In Manual mode, the water heater regulates water temperature at a pre - set value. The temperature is selected by
The requested temperature is validated by pressing the key.
The real-time water temperature at the bottom of the tank is permanently displayed.
using the or , in a range from 40 °C to 70 °C.

19
Vacation Mode
Whenever the premises that the water heater is installed in are unoccupied for a period of time
, vacation mode can be
Selected. In vacation mode, the water heater will maintain the water at a minimum temperature (4°C) preventing any
risk of water freezing.
or
When the specified period is over, the water heater will automatically go back to the operating mode selected before
To reach the Vacation mode, short press logo is selected and validated
In Vacation mode, by default, the number of vacation days is undefined . If no day period is specified, the
water heater will stay in vacation mode until it is manually cancelled.
The number of days can be selected by pressing
speed day selection. This mode is cancelled by selecting a new mode.
vacation mode. This mode is cancelled by selecting a new mode.
button until the
and validated by . A long press will perform a fast
Boost
The requested temperature is validated by pressing the key.
Boost mode is selected by long pressing the key.
Boost mode, heats the water to the selected temperature as fast as possible. After completion of the boost it will
return into the mode activated before Boost was selected. Boost can be selected at any time and overrides
programme periods. The temperature is selected by using the or , in a range from 65°C to 70°C.

20
Timer setting
Timer mode allows setting of the current time. A timer setting is mandatory before using the program mode
.
A long key
press on or performs a fast speed hour or minute selection.