Heatrae Sadia Multipoint 30H User manual

Multipoint Horizontal 30 and 50 litre
Fitting Instructions

 This product 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 supervision or
instruction concerning use of the product in a safe way and understand
the hazards involved. Children shall not play with the product. Cleaning
and user maintenance shall not be made by children without supervision.
Children must be supervised to ensure they do not play with the product.
The HWA Charter Statement 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.
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cation ...............................5
3.1 Technical data ........................................5
3.2 Dimensions and connections .................5
3.3 Electrical diagram(s) ..............................5
4. Description of the product..........................6
4.1 General description ................................6
4.2 Operation principle .................................6
4.3 Standard delivery ...................................6
4.4 Mains connections .................................6
5. Before installation .......................................7
5.1 Installation regulations ...........................7
5.2 Installation requirements ........................7
5.3 Choice of location...................................7
6. Installation....................................................8
6.1 General ..................................................8
6.2 Water connections..................................8
6.3 Electrical connections ............................11
7. Commissioning............................................11
7.1 General ..................................................11
7.2 Checklist before commissioning.............11
7.3 Commissioning procedure .....................11
8. Operation......................................................12
8.1 General ..................................................12
9. Maintenance.................................................13
9.1 General ..................................................13
9.2 Standard inspection & maintenance
operations ..............................................13
10. Troubleshooting........................................14
10.1 Fault nding..........................................14
11. Decommissioning procedure ..................15
12. Spare parts................................................15
Accessories......................................................16
Warranty ...........................................................16

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 Regulation G3 (England and Wales),
Technical Standard P3 (Scotland) or Building
Regulation P5 (Northern Ireland) and the Water
Fitting Regulations (England and Wales) or Water
Byelaws (Scotland).
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.
WARNING
Risk of dangerous situation causing slight
physical injury.
DANGER
Risk of dangerous situation causing slight
physical injury.
CAUTION
Risk of material damage.
Signals important information.
1.3 Abbreviations
`RCD – Residual current device
`MCB – Miniature circuit breaker
1.4 Liabilities
Manufacturer’s liability
Our products are manufactured in compliance with
the requirements of the various applicable European
Directives.
This product complies with the requirements of the
CE marking directive.
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 on using the
product.
`Faulty or insufcient maintenance of the product.
`Failure to abide by the instructions on installing
the product.
Installer's liability
The installer is responsible for the installation and
the commissioning of the product. The installer must
respect the following instructions:
`Read and follow the instructions given in the
manuals provided with the product.
`Carry out installation in compliance with the
prevailing legislation and standards.
`Perform the initial start-up and carry out any
checks necessary.
`Complete the commissioning checklist.
`Explain the installation to the user.
`If maintenance is necessary, warn the user of
the obligation to check the product and maintain
it in good working order.
`Give the instruction manual to the user.
User’s liability
To guarantee optimum operation of the product, the
user must respect the following instructions:
`Read and follow the instructions given in the
manuals provided with the product.
`Call on qualied professionals to carry out
installation and initial start-up.
`Get your tter to explain your installation to you.
`Have your required checks and services done.
`Keep the instruction manuals in good condition
and close to the product.

4
2.3 Specic safety instructions
WARNING
DO NOT operate the product if:
`Water ceases to ow during use.
`Water has entered inside the
product because of an incorrectly
tted cover.
`If the appliance is damaged.
(in all cases turn off mains power and
isolate water supply)
`If water discharges from the
temperature/pressure relief valve
on the product shut down. 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 circumstance.
2. Safety
2.1 General safety warnings
DANGER
This product 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 adhered to.
WARNING
`Only competent persons having
received adequate training are
permitted to work on the product
and the installation.
`Do not tamper with the safety
valve supplied.
`Before any work, switch off the
mains supply to the appliance.
`Do not switch on if there is a
possibility that the water in the
appliance is frozen.
CAUTION
Do not operate immersion heater until the
product has been lled with water.
2.2 Recommendations
CAUTION
`Annual maintenance is
recommended by a competent
person.

5
3.3 Electrical diagram(s)
3. Technical specication
3.1 Technical data
Supplier’s name or trade mark Multipoint
Supplier’s model identier 30H 50H
Storage volume V in litres 30.0 50.0
Mixed water at 40 °C V40 in litres 38.5 61.4
The declared load prole S M
The water heating energy efciency class of the model D D
The water heating energy efciency in % 29.3 34.7
The annual electricity consumption in kWh 629 1482
Daily fuel consumption in kWh 3.09 7.02
The thermostat temperature settings of the water heater, as placed on the
market by the supplier 60°C
Specic precautions that shall be taken when the water heater is assembled,
installed or maintained and disposed of at end of life See Section 3 to 11
Electrical rating 3kW@240V~/2.75kW@230V~
Capacities 30 or 50 litres
Weight (full) 30 litre - 42.5kg 50 litre - 69.3kg
Rated pressure 0.6MPa (6 bar)
Minimum recommended supply pressure 0.08MPa (0.8 bar)
Maximum supply pressure to PRV 1.6MPa (16.0 bar)
Combined pressure reducing valve 0.35MPa (3.5 bar)
Pressure relief valve 0.6MPa (6 bar)
Expansion vessel pre-charge 0.35MPa (3.5 bar)
Temperature/Pressure Relief Valve 90°C/0.7MPa (7 bar)
3.2 Dimensions and connections
Element Red
Black
Black
L
N
Red
Red
Red
Terminal
block
Thermal
cut-out Thermostat
Neon
Earth
link to
container
Element
plate
earth
post
Dimension30 litre 50 litre
A
B
C
D
616 888
665
788
355
937
1060
627
A
B
C
25
168
352
390
115 D
100
370
74
Figure 2 – wiring diagram
Figure 1
Table: Technical parameters in accordance with European Commision regulations 814/2013 and 812/2013

6
4.2 Operation principle
The product is used to heat and store hot water for
use in domestic applications.
4.3 Standard delivery
`Product
`Expansion vessel
`Combined pressure reducing valve
`Single check valve
`Pressure relief valve
`Tundish
`Fixing bracket
`Screw pack
`Instructions
4.4 Mains connections
See gure 4 below.
4. Description of the product
4.1 General description
This product is a purposed designed unvented water
heater. The product has a copper inner vessel,
which ensures an excellent standard of corrosion
resistance. The outer casing is a combination of
resilient thermoplastic moldings and painted steel.
The product is supplied complete with all the necessary
safety and control devices needed to allow connection
to the cold water mains. These components are preset
and should not be tampered with.
Temperature
and pressure
relief valve
Hot
Drain
cock
To drain
(waste)
Tundish
Pressure
reducing
valve
Cold
water
mains
Service
valve
Balanced
cold water
draw off
Check
valve
Expansion
vessel
Pressure
(expansion)
relief valve
Multipoint
30 litre
or 50 litre
heater
Figure 4 – Installation diagram

7
5.3 Choice of location
`National Wiring rules may contain restrictions
concerning the installation of these products in
bathrooms.
`The product should be Horizontally wall
mounted using the wall bracket supplied. The
water connections must always be to the right
of the product.
`For servicing leave the following minimum
distances; 250mm on right hand side and
330mm on the left hand side. Refer to gure 1
and the dimension table to determine a suitable
position for the product.
WARNING
Ensure that the wall can support the full
weight of the product (see Technical
specications) and that there are no
hidden services (electricity, gas, or water)
below the surface of the wall.
5. Before installation
5.1 Installation regulations
WARNING
Installation of the product 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
5.2 Installation requirements
Water supply
In an unvented system the pressure and owrate is
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.
`We suggest the minimum supply requirements
should be 0.08MPa (0.8 bar) pressure.
`A 15mm cold water supply is recommended.
`The higher the available pressure and ow rate
the better the system performance.
`The water supply must be of wholesome water
quality (Fluid Category 1 as dened by the Water
Supply Regulations 1999).
Outlet/terminal ttings (taps,etc.)
`The product can be used with most types of
terminal ttings.
`It is not recommended for supplying a shower.
`All ttings, pipework and connections must have
a rated pressure of at least 8 bar at 80°C.

8
WARNING
Failure to provide adequate pressure relief
will invalidate any warranty and lead to a
dangerous installation.
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 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 unit or package.
6. Installation
6.1 General
After reading the previous sections in this booklet
and choosing a good location for the product please
install, paying attention to the following hydraulic,
electrical and commissioning sections.
6.2 Water connections
WARNING
`Under no circumstances should
the factory tted temperature/
pressure relief valve be removed
other than a competent person. To
do so will invalidate any warranty
or claim.
`No control or safety valve 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 4, page
6) to determine which valves and accessories are
required.
Plumb in the valves in the sequence shown in the
relevant gures 4, page 6.
`The water connections are 15mm diameter
copper tubes suitable for compression ttings.
Do not use solder joints as this will damage
the heater and may prevent servicing under
warranty.
`The INLET is marked BLUE, the OUTLET is
marked RED. The WRAS listed isolating valve
(supplied) must be tted on the cold water supply
to the product. Several hot outlets can be served.
`A drain valve must be tted below the heater in
the inlet pipework. It must be sited between the
heater and the check valve (see gure 4 page 6).
`Plumbers Paste must not be used as it can
impair the operation of the valves.
`The product MUST be tted with a Pressure
Relief Valve. The factory tted Temperature/
Pressure Relief Valve can fulll this function.

9
`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 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.
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 g 15).
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 g. 15);
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 gure 5,
table 5 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.

10
`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. 15: 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 5:
`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.
Safety device
(e.g. temperature
relief valve)
Metal discharge pipe (D1) from
temperature relief valve to tundish
600mm
maximum
300mm
maximum
Tundish
Discharge pipe (D2) from tundish,
with continuous fall. See Building
Regulations G3 section 3.56,
Table 4 and worked example
Discharge below
fixed grating
(Building
Regulation G3
section 3.61
gives alternative
points of
discharge
Fixed grating
Trapped gully
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 (ie 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
1.4m 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
Figure/Table 5

11
7. Commissioning
7.1 General
After lling the installation with water in the previous
section please follow the following steps to complete
the installation of the product.
WARNING
DO NOT switch on the product until it has
been lled with water.
7.2 Checklist before commissioning
`Check all water connections for leaks and rectify
as necessary.
`Check that all installation, electrical and
discharge pipe requirements have been met.
`Check that electrical connections are tight.
7.3 Commissioning procedure
`Open a hot water tap; turn on mains water
supply to the product.
`Allow product to ll and leave hot tap running
for a short while to purge any air and ush out
the pipework. Close the hot tap and check the
system for leaks.
`Manually test the operation of the Temperature/
Pressure Relief Valve and, if tted, the Pressure
(expansion) Relief Valve. Ensure water ows
freely from the valve(s) and through the
discharge pipes.
`Switch on the electrical supply. The indicator
light will illuminate during heating. When the set
temperature is reached, the indicator light will go
out.
`The set temperature can be adjusted by rotating
the knob located in the terminal cover. It is
possible to lock the thermostat knob in either
the mid-range or a “hot” position by following
the procedures below. Always switch off the
electrical supply before removing the terminal
cover.
6.3 Electrical connections
WARNING
`Disconnect from the mains
electrical supply before removing
any covers.
`This product must be earthed. It is
suitable for a.c. supply only.
`Disconnect the electrical supply
before removing the terminal
cover.
`Installation must be in accordance
with the current I.E.E. Wiring
Regulations.
`The product is supplied tted with a 1.0m 3 core
1.5mm2 exible cable on the 3kW model. The
electricity supply should be fused 13 Amp for a
3kW model and be via a double pole isolating
switch with a contact separation of at least 3mm
in both poles. Refer to the schematic wiring
diagrams (gure 3.3 page 5).
The wires are colour coded as follows:
Green and Yellow EARTH
Brown LIVE (L)
Blue NEUTRAL (N)

12
`Setting the “mid-range” position:
Rotate the thermostat knob to the mid position.
Remove the terminal cover by using a large at
bladed screwdriver to depress the four snap lugs
located in the four top rectangular depressions
on the cover. Holding the thermostat knob in
position turn the terminal cover over and remove
the backing disc from the underside of the cover.
Turn the backing disc over and ret to the knob
ensuring the notch locates with the boss on the
underside of the cover. Ret the terminal cover,
the thermostat will now be locked in the “mid-
range” position.
`Setting the “hot” position:
Rotate the thermostat knob to mid-way through
the hot graduated range (red graphic). Follow
the procedure detailed above; however in
this case the knob should be held in the “hot”
position previously set. When the terminal cover
has been retted the thermostat will be locked in
the “hot” position. This position is recommended
when using the heater in conjunction with a
thermostatic blending valve.
`Water may drip from the discharge pipe of the
pressure relief device - this pipe must be left
open to atmosphere.
8. Operation
8.1 General
WARNING
`Do not block or restrict the
discharge from any safety valve
tted.
`Do not tamper with any safety
valve tted.
`If water discharges from any
safety valve tted, switch off the
electrical supply to the product
immediately. Contact the Heatrae
Sadia Service Team (Tel: 0844
8711535) or an approved installer.
Do not turn the electrical supply
on again until the product has
been checked and approved by a
qualied installer.
`The product stores water at the temperature set
on the adjustable thermostat. This can be set to
give temperatures in the range of 10 to 75°C. To
avoid any risk of freezing when the product is not
in use for long periods during the winter months,
do not switch off the electrical supply and set the
thermostat to its minimum position. N.b. this will
not protect other system pipework.
`The thermostat can also be locked in either the
mid-range or a “hot” (recommended when using
in conjunction with a Thermostatic Blending
Valve) position. To lock the thermostat position,
the instructions given under Section 7 page 12
should be followed. We recommend that this
procedure is carried out by a qualied electrician.
`The indicator light will be illuminated when the
product is heating.

13
9.2 Standard inspection & maintenance
operations
To descale:
`Switch off and disconnect the electrical supply.
Turn off the water supply to the product.
`Open a hot tap to relieve any system pressure.
Disconnect the plumbing connections to the
product and remove from the wall bracket (note
full weights of product). Empty the product by
opening the drain valve in the inlet pipework.
`Remove the terminal cover by using a large at
bladed screwdriver to depress the 4 snap lugs
located in the top 4 rectangular depressions.
`Disconnect the electrical terminations to the
thermostat. Disconnect earth links to the
earthing stud.
`Remove the element plate assembly by
unscrewing the ve securing screws, a tapped
jacking point is provided. Remove any loose
scale from the container. Carefully clean off any
scale from the element and thermostat pocket.
DO NOT clean scale from interior container
walls.
`Re-assemble the element plate assembly tting
a new sealing gasket. Rewire the product with
reference to the Wiring Diagrams. Ret the
insulating pad to ensure the correct operation of
the thermostat.
`Re-commission the product following the
Installation and Commissioning instructions.
`The Temperature/Pressure Relief Valve and,
if tted, the Pressure (expansion) Relief Valve
should be regularly checked. This is to remove
lime scale deposits and to verify that it is not
blocked. To check the valves:
• Manually operate the valves by either twisting
the cap or lifting the lever. Ensure water
ows freely from the valve(s) and through the
discharge pipes. Ensure the valve(s) reseat
correctly when released.
`The Expansion Vessel, should have a precharge
pressure of 0.35 MPa (3.5 bar). This can reduce
over time and eventually require re-charging. To
do this:
• Turn off water supply to the product; open a
hot tap to relieve system pressure.
• Remove dust cap from top of Expansion
Vessel
• Check pre-charge pressure using a tyre
pressure gauge. If the pressure is lower than
0.35 Mpa (3.5 bar) it should be recharged
using a tyre pump (Schraeder Valve type).
DO NOT OVER CHARGE.
• Re-check pressure and when correct replace
dust cap.
• Turn on mains water supply and close hot
tap.
9. Maintenance
9.1 General
Maintenance requirements
Unvented hot water systems have a continuing
maintenance requirement in order to ensure safe
working and optimum performance. It is essential that
the relief valve is periodically inspected and manually
opened to ensure no blockage has occurred in the
valves or discharge pipework. Maintenance of this
appliance should only be carried out by a suitably
qualied person. Failure to do so could invalidate the
warranty
WARNING
Disconnect from all electrical supplies
before beginning any work on the product.
Water contained within the product may
be very hot!
Maintenance should be carried out by a
competent person and any replacement
parts should be authorised Heatrae Sadia
spare parts.
It is recommended that maintenance is
carried out annually and should include
the checks detailed in the sections below.
Little maintenance is required, however in
hard water areas the product will require
periodic descaling to ensure efcient
operation.

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10.1 Fault nding
Disconnect the electrical supply before removing the
terminal cover. It is recommended that any service
operations on the product are carried out by a
competent person.
10. Troubleshooting
WARNING
Do not tamper with any of the safety valves
or controls supplied with the cylinder as
this will invalidate any warranty.
Symptom Possible cause Remedy
Water not heating A. Electrical supply fault A. Check electrical supply
B. Thermal cut-out tripped B. Check cut-out, if operated reset and check
thermostat operation. If necessary replace
thermostat/thermal cut-out (see wiring diagram)
C. Thermostat fault C. Check thermostat operation. Replace if
necessary
Discharge of water
from pressure relief
valve (continuously)
Excessive mains water pressure Fit Pressure reducing valve Pack U1 and U2
(see important installation points)
Discharge of water
from Pressure relief
valve (intermittently)
A. Expansion in mains not
possible
A. Fit pack U2 (see important installation points)
B. Mains pressure exceeds 0.41
MPa (4.1 bar)
B. Fit packs U1 and U2
C. Pack U1 tted without pack U2 C. Fit pack U2 when using pack U1
D. Pressure relief valve fault D. Replace pressure relief valve
E. Loss of pressure from
expansion vessel
E. Check and if necessary re-charge Expansion
vessel pre-charge pressure (see section 9)
Discharge of water
from Temperature /
pressure relief and/
or water/steam from
pressure relief valve
Thermostat and thermal cut-out
fault
Replace thermostats and thermal cut-outs
No water ow A. Inlet vales incorrectly tted A. Check all vales are correctly installed in
accordance with ow direction arrows
B. Mains water supply not turned
on
B. Check mains water supply is on
C. Blockage in mains water
supply
C. Check for obstructions. If pack U1 is tted
check the strainer is not blocked
'Milky water' Oxygenated water Water from a pressurised system releases
oxygen bubbles when owing. The milkiness will
disappear after a short while

15
12. Spare parts
The following comprehensive list of spare parts is
available for your product. Please refer to the Rating
Label on the side of your product before ordering to
ensure the correct spare part is obtained.
Do not replace with parts not recommended by
Heatrae Sadia - this will invalidate your warranty and
may render the installation dangerous.
11. Decommissioning procedure
`Isolate electrical supplies and make safe
`Isolate the water supply
`Drain the product
`Remove product
`Cap pipework
Environmental information
The Waste Electrical and Electronic Equipment
(Producer Responsibility) Regulation 2004
This product is outside of the scope of the European
Waste Electrical & Electronic Equipment Directive as
interpreted within the UK.
In the UK this product can therefore be disposed of
through commercial non-WEEE waste facilities.
Heatrae Sadia does not accept any liability under the
WEEE directive.
This product is manufactured from many recyclable
materials. At the end of its useful life it should be
disposed of at a Local Authority Recycling Centre to
realise the full environmental benets.
Insulation of the product is by means of an approved
CFC/HCFC free polyurethane foam with an ozone
depletion factor of zero and a Global Warming
Potential (GWP) of 3.1.
The product does not contain any substances
harmful to health; it does not contain any asbestos.
Description Code No
Element plate assembly -
30/50 litre 3kW
95 606 933
Thermostat 95 612 667
Thermal cut-out 95 612 666
Indicator light 95 607 995
Element plate gasket 95 611 708
Pressure (expansion) Relief Valve 95 607 986
Temperature/Pressure Relief Valve 95 905 045
Check Valve 95 607 987
Expansion Vessel 95 607 675
Pressure Reducing Valve 95 607 989

16
Warranty
The product warranty is for a period of ve years
from the date of purchase with the exception of the
immersion heater and thermal controls which are
covered for a period of two years provided:
1. The product has been installed in accordance
with these instructions and all necessary inlet
controls and safety valves have been tted
correctly.
2. Any valves or controls are of Heatrae Sadia
recommended type.
3. The product has not been tampered with and
has been regularly maintained as detailed in
these instructions.
4. The product has been used only for heating
potable water.
5. Within 60 days of installation, the user completes
and returns the certicate supplied along with
proof of purchase to register the product.
The product is not covered against damage by frost
and the immersion heater is not covered against
excessive scale build up.
This warranty does not affect the statutory rights of
the consumer.
Accessories
The product can be used to supply several hot water
outlets via conventional taps. It is not recommended
for supplying a shower. Individual site demands
should be considered when choosing capacity and
the number of outlets to be served.
A Thermostatic Blending Valve can be used in
conjunction with this product. Accessory Pack U3
(code no. 95 970 354) is recommended. Follow the
installation instructions supplied with the valve for
connection to the system.

17

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19

PN 36 00 5726 Issue 3
©Heatrae Sadia 2015
Please follow us online:
Electric Water Heating Co.
2 Horsecroft Place
Pinnacles
Harlow
Essex CM19 5BT
Tel: [phone]
E-Mail: [email protected].uk
SPD
Special Product Division
Units 9 & 10
Hexagon Business Centre
Springeld Road
Hayes
Middlesex UB4 0TY
Tel: [phone]
Parts Center
Tel: [phone]
www.partscenter.co.uk
Newey & Eyre
Unit 3-5 Wassage Way
Hampton Lovett Ind. Estate
Droitwich, Worcestershire
WR9 0NX
Tel: [phone]
Fax: [phone]
UK Spares Ltd
Unit 1155
Aztec West
Almondsbury
Bristol BS32 4TF
Tel: [phone]
Alternatively contact your
local supplying merchant
or wholesale branch or use
our online stockist nder at
www.interpartspares.co.uk
PRODUCT RANGE
Full specication details on all our products are available to download from our website.
To support our corporate responsibility and sustainability charters and reduce our
printed material we encourage you to download product brochures from our website.
In designing these les we have taken into account the need to access data on screen.
If you would like to receive a printed copy of our full product catalogue please call
our literature hotline on 01603 420127.
Heatrae Sadia may introduce modications to their products from time
to time. Consequently, the details given in this brochure are subject to alteration
without notice.
OUR NATIONWIDE NETWORK OF CUSTOMER SUPPORT ENGINEERS
Heatrae Sadia has its very own dedicated nationwide network of highly trained
customer support engineers so you can have peace of mind that we’re always
here to help.
MADE IN
THE UK
5
5 YEAR
INNER
CONTAINER
WARRANTY
SPECIFICATION ADVICE HOTLINE
t| 01603 420220 e| speci[email protected]
AFTER SALES SERVICE
t| 0344 871 1535 e| customer.suppor[email protected]
w | heatraesadia.com
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