Heatrae Sadia B3 M User manual

Fitting Instructions and User Guide
B3/C3 M RANGE

2
CONTENTS
SECTION ...............................................................PAGE
1.0 INTRODUCTION ................................................. 3
2.0 TECHNICAL SPECIFICATION............................. 4
3.0 INSTALLATION .................................................... 5
4.0 COMMISSIONING.............................................. 11
5.0 EXPLANATION TO USER................................... 12
6.0 MAINTENANCE.................................................. 14
7.0 FAULT FINDING.................................................. 15
8.0 SPARE PARTS ...................................................... 16
9.0 ACCESSORIES .................................................... 16
10.0 GUARANTEE....................................................... 17
11.0 ENVIRONMENTAL INFORMATION.................. 17
12.0 COMMISSIONING RECORD............................. 18
13.0 SERVICE RECORD .............................................. 19
14.0 SPARES STOCKISTS ........................................... 20

3
1.0 INTRODUCTION
Thankyou for purchasing a Heatrae Sadia B3M or C3M vented water heater.
The B3M or C3M water heater is manufactured in the UK to the highest
standards and has been designed to meet all the latest relevant safety
specifications.
1.1 IMPORTANT POINTS
The B3M or C3M must be installed and commissioned by a competent
person. Please read and understand these instructions before installing the
B3M or C3M. Following installation and commissioning, the operation of the
B3M or C3M should be explained to the user and these instructions left with
them 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 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 supervi-
sion.
Children must be supervised to ensure they do not play with
the appliance.
Means for disconnection from the supply mains having a con-
tact seperation in all poles that provide full discnnection under
overvoltage category III conditions is required. The instructions
shall state that means for disconnection must be incorporated
in the fixed wiring in accordance with the wiring rules.
The B3M or C3M vented water heaters are designed to be wall mounted.
Ideally they should be mounted close to where hot water is required most
frequently. Pipe runs should be kept to a minimum.
The B3M and C3M can be installed either as an Open Outlet or Cistern Fed
type unit when used with the appropriate fittings.

4
Install only as an OPEN OUTLET or CISTERN FED unit, failure to do so will
invalidate any guarantee and may lead to a dangerous installation.
OPEN OUTLET INSTALLATION
When installed as an Open Outlet water heater the outlet acts as a vent
and must not be connected to any form of tap or fitting not recomended
by Heatrae Sadia. Only one outlet can be served via an Open Outlet type
tapset.
CISTERN FED INSTALLATION
When installed as a Cistern Fed water heater the cold water supply must
be from a feed cistern complying with Water Byelaw 30.
A vent pipe must be connected to the outlet of the heater. The vent pipe
must rise continuously and be arranged to discharge into the cold water
feed cistern.
The vent pipe must have a minimum bore of 19mm.
More than one conventional tap can be supplied.
1.2 PACK CONTENTS
Before commencing installation check that all the following components have
been supplied in the Installation Kit :
• Open Outlet Spout
• Inlet Valve
• White 15mm Push Fit Spout Adaptor
• White 15mm Push Fit Cap
• White 15 x 22mm Push Fit Straight Connector
• Wall mounting bracket set
• Self adhesive Levelling Feet (2 off)
• Moulded plastic Spacer
• White 15mm Push Fit blanking cap
2.0 TECHNICAL SPECIFICATION
Electrical rating ..........................................................2.75/3kW @ 230/240V ~
Capacities...................................................................B3M - 30 litres
.....................................................................................C3M - 50 litres
Weight (full)................................................................B3M - 42.5kg
.....................................................................................C3M - 69.3kg
Rated pressure (Open Outlet) ..................................0MPa (0 bar)
Rated pressure (Max, head pressure Cistern Fed)..0.2MPa (2 bar) (20 metres)
Minimum recommended supply pressure ..............0.04MPa (0.4 bar) (4 metres)

5
3.0 INSTALLATION
Warning: this appliance must be earthed. It is suitable for a.c. supply only.
Electrical installation must be carried out by a competent electrician and be in
accordance with the latest IEE wiring regulations
Warning: Do not connect any pressure-relief device to the vent pipe of this
water heater.
Warning: The outlet acts as a vent and must only be connected to a fitting
recommended by the manufacturer. It must not be connected to a tap.
1. National Wiring rules may contain restrictions concerning the installation of
these units in bathrooms.
2. The unit should be vertically wall mounted using the wall bracket and levelling
feet supplied (see Section 3.1 INSTALLATION - WALL MOUNTING). The inlet
and outlet water connections must always be on the bottom of the unit.
3. Enough space should be left below and at the top above the unit for pipe
connections. Refer to Diagram 1 and the Dimensions Table to determine a
suitable position for the heater.
4. NOTE: Ensure that the wall can support the full weight of the unit (see
TECHNICAL SPECIFICATIONS) and that there are no hidden services (electricity,
gas, or water) below the surface of the wall.
5. DO NOT install where the unit may freeze.
6. Refer to the section IMPORTANT INSTALLATION POINTS to determine which
valves and accessories are required.
7. The water connections are 15mm diameter copper tubes suitable for compression
fittings. Do not use solder joints as this will damage the heater.
8. The INLET is marked BLUE, the OUTLET is marked RED. It is recommended that
a WRAS Listed isolating valve be fitted on the cold water supply to the heater.
9. Plumbers Paste must not be used as it can impair the operation of components.
Direct
Supplier’s name or trade mark
Supplier’s model identifier B3 C3
Storage volume V in litres 30.0 50.0
Mixed water at 40 °C V40 in litres 50 77
The declared load profile SM
The water heating energy efficiency class of the model DD
The water heating energy efficiency in % 30.6 34.5
The annual electricity consumption in kWh 603 1489
Daily fuel consumption Q fuel in kWh 2.940 7.060
The thermostat temperature settings of the water heater,
as placed on the market by the supplier
Specific precautions that shall be taken when the water
heater is assembled, installed or maintained and disposed
of at end of life
B3M/C3M
60°C
See section 2 to 6
Table: Technical parameters in accordance with European Commision
regulations 814/2013 and 812/2013

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3.1 INSTALLATION - WALL MOUNTING
1. Using Figure 1 and the Dimensions Table as a guide mark the position
of the wall mounting bracket and lower location point. Drill and plug the
wall with suitable fixings, fix the wall bracket to the wall.
2. Fit the heater wall bracket to the rear of the unit using the screws provided
ensuring the central location bolt is pointing towards the bottom of the
unit.
3. Remove the backing paper from the self adhesive pads of the Levelling
Feet and affix them to the lower back of the unit in the approximate
positions shown on Figure 2.
4. Hang the unit on the wall mounting bracket ensuring the location bolt
locates in the hole in the wall bracket. Position the moulded spacer block
between the tab on the bottom cover moulding and the wall. Insert a
No. 10 x 2 1/2”long screw through the tab and spacer block and tighten
into wall plug.
FIGURE 01: DIMENSIONS
352
74
25
168
D
121
AB C
236
370
100
FIXING CENTRES
OF MOUNTING
BRACKET
FIXING CENTRES
OF MOUNTING
BRACKET
FIXING CENTRE
OF LOWER
LOCATION POINT
Dimension B3M C3M
A 616 888
B 665 937
C 705 977
D 506 778

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3.2 PLUMBING - OPEN OUTLET
1. When installed as an Open Outlet water heater the outlet acts as a vent
and must not be connected to any form of tap or fitting not recommended
by Heatrae Sadia.
2. Only one outlet can be served. The fittings supplied include an inlet Tap,
300mm Open Outlet Spout, a 15mm straight Push Fit connector and a
15mm Push Fit cap. The heater should be sited so that the spout can
discharge into a suitable sink or basin.
3. Streamline option packs K, Q, Y, J, M, W, R, P, X, or S/T can be used in
place of the spout to provide a single tap outlet. Flow rates will be at a
reduced rate. Note: item 3.2.7
4. The cold water supply may be taken from the cold water mains or
from a cold water feed cistern complying with Water Byelaw 30 with a
minimum recomended pressure of 0.4 bar (4 metres head). A drain cock
should be incorporated in the supply to facilitate draining the heater for
maintenance.
5. The inlet tap should be fitted to the INLET pipe of the heater. The inlet
must not be connected directly to the cold water mains supply. The
Outlet Spout should be fitted to the OUTLET pipe using the 15mm
straight push fit connector supplied in the fittings kit.
6. The 15mm Push Fit Cap, with tamperproof collet, must be fitted to the
Vent Pipe on the top of the heater.
7. In an Open Outlet installation it is normal for the spout to drip during
heating. This is due to expansion of water as it is heated within the unit, it
does not indicate a fault. DO NOT attempt to stop this dripping by over-
tightening the inlet tap as damage to the sealing washers or internal
operating mechanism will occur.
FIGURE 02: BRACKET & LEVELLING FEET POSITIONS
HEATER
MOUNTING
BRACKET
LOCATING
BOLT
SELF ADHESIVE
LEVELLING FEET
MOULDED
SPACER BLOCK
BACK
OF
HEATER

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3.3 PLUMBING - CISTERN FED
1. This method of installation must be used if the outlet is to be connected
to one or more conventional taps. It is not recommended for suppling
a shower. Individual site demands should be considered when choosing
the number of outlets to be served.
2. A vent pipe must be connected to the outlet connection of the heater.
3. The vent pipe must have a minimum internal diameter of 19mm.
4. The vent pipe must be unobstructed, rise continously and be arranged
to discharge over the cold water feed cistern. DO NOT connect any
pressure relief device to the vent pipe of this water heater.
5. The cold water supply must be from a cold water feed cistern complying
with Byelaw 30. The maximum head pressure must not exceed 20
metres.
6. It is recomended that an WRC Listed isolating valve is fitted on the cold
water supply to the heater. A drain cock should be fitted on the inlet
pipe to the heater at a level lower than the unit to allow draining for
maintenance.
7. The inlet must not be connected directly to the cold water mains
supply.
8. The Vent Pipe should be connected to the top of the heater using the 15
x 22mm Push Fit Straight Connector supplied.
FIGURE 03: TYPICAL OPEN OUTLET INSTALLATION
FIT PUSH FIT CAP
(SUPPLIED)
OUTLET SPOUT
(SUPPLIED) INLET VALVE
(SUPPLIED)
COLD WATER
SUPPLY
ISOLATING VALVE
(NOT SUPPLIED)
DRAIN COCK
(NOT SUPPLIED)

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FIGURE 04: TYPICAL CISTERN FED INSTALLATION
DRAIN
COCK
VENT
PIPE
CISTERN TANK
ISOLATING
VALVE
B3/C3 M
HEATER

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3.4 INSTALLATION - ELECTRICAL REQUIREMENTS
WARNING: THIS APPLIANCE MUST BE EARTHED. IT IS SUITABLE FOR A.C.
SUPPLY ONLY.DISCONNECTTHEELECTRICALSUPPLYBEFOREREMOVING
THE TERMINAL COVER. INSTALLATION MUST BE IN ACCORDANCE WITH
THE CURRENT IEE WIRING REGULATIONS.
1. The unit is supplied fitted with a 1.0m 3 core 1.5mm2flexible cable. The
electicity 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 diagram below.
2. The wires are colour coded as follows:
Green and Yellow EARTH
Brown LIVE (L)
Blue NEUTRAL (N)
FIGURE 05: WIRING DIAGRAM
TERMINAL
BLOCK
THERMAL
CUT-OUT THERMOSTAT
RED
BLACK
ELEMENT RED
RED
NEON
EARTH LINK
TO
CONTAINER
ELEMENT
PLATE
EARTH
POST
N
L

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4.0 COMMISSIONING
DO NOT SWITCH ON THE ELECTRICAL SUPPLY UNTIL THE UNIT HAS
BEEN FILLED WITH WATER AND CHECKED FOR LEAKS.
4.1 PLUMBING
1. Check that all installation, electrical and discharge pipe requirements
have been met.
2. Check that all water and electrical connections are tight.
3. Open a hot water tap, turn on mains water supply to the heater.
4. Allow unit to fill and leave hot tap running for a short while to purge any
air and flush out the pipework. Close the hot tap and check the system
for leaks.
4.2 ELECTRICAL
1. Switch on the electrical supply. The indicator light will illuminate
during heating. When the set temperature is reached the indicator
light will go out.
2. 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 in 4.2.3
or 4.2.4 below. Always switch off the electrical supply before removing
the terminal cover.
3. Setting the “mid-range” position:
Rotate the thermostat knob to the mid position. Remove the terminal
cover by using a large flat bladed screwdriver to depress the four snap
lugs located in the four rectangular depressions on the bottom 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 refit to the knob ensuring the notch locates with
the boss on the underside of the cover. Refit the terminal cover, the
thermostat will now be locked in the “mid-range” position.
4. 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 refitted the thermostat will be locked in the
“hot” position. This position is recommended when using the heater in
conjunction with a thermostatic blending valve.

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5.0 EXPLANATION TO USER
Following Installation and Commissioning of the water heater, the operation
should be fully explained to the user.
5.1 HOT WATER
1. Indicate the location of the water heater and identify the outlets to which
it is connected.
2. Explain how the temperature is set and how the B3M and C3M vented
water heaters store water at the temperature set on the adjustable
thermostat. This can be set to give temperatures in the range of 10 to
75°C.
3. Explain that to avoid any risk of freezing when the heater is not in use for
long periods during the winter months, the electrical supply should be
left on & the thermostat set to its minimum position. This will protect the
heater, but not the system pipework.
4. Show how the thermostat can be locked in either the mid range or “hot”
position and recommend that this procedure is carried out by a qualified
electrician.
5. Show that the indicator light will be illuminated when the unit is
heating.
6. Recomend that to ensure the heater continues to operate at its optimum
performance it should be periodically maintained in accordance with the
instructions given under the Sections headed MAINTENANCE.
5.2 SYSTEM MALFUNCTION
1. Explain how to isolate electrical and water supplies in case of a fault.
2. Explain that a qualified plumber and/or electrician should be contacted
if there is a fault.
3. Explain how to identify/check basic faults.
4. Explain the necessity to carry out regular maintenance of the water
heater to ensure its continued safe and efficient operation.
5.3 LITERATURE
Hand over the Installation and User Instructions.

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5.4 IMPORTANT NOTES TO USERS OF OPEN OUTLET INSTALLATIONS
When installed as an Open Outlet water heater the outlet acts as a vent
and must not be connected to any form of tap or fitting not recomended by
Heatrae Sadia.
The outlet of the tap must not be restricted or blocked in any way.
In an Open Outlet installation it is normal for the hot outlet to drip during
heating. This is due to the expansion of water as it is heated within the unit,
it does not indicate a fault with the unit.
DO NOT attempt to stop this dripping by over-tightening the inlet tap as
damage to the sealing washers or the operating mechanism will occur.

14
6.0 MAINTENANCE
WARNING: DISCONNECT FROM ALL ELECTRICAL SUPPLIES BEFORE
BEGINNING ANY WORK ON THE B3M OR C3M WATER HEATER. FLUID
CONTAINED IN THE WATER HEATER MAY BE VERY HOT!
To ensure the continued safe and efficient operation of the unit, it should be
regularly maintained.
Maintenance should be carried out by a competent person and any
replacement parts used should be authorised Heatrae Sadia spare parts.
It is recommended that maintenance carried out annually and should include
the checks detailed in the section below.
Little maintenance is required, however in hard water areas the unit will require
periodic descaling to ensure efficient operation. To descale the unit:
1. Switch off and disconnect the electrical supply. Turn off the water supply
to the unit.
2. Open a hot tap to relieve any system pressure. Empty unit by opening
the drain cock in the inlet pipework.
3. Remove the terminal cover by using a large flat bladed screwdriver to
depress the 4 snap lugs located in the 4 rectangular depressions on the
bottom cover.
4. Disconnect the electrical terminations to the element. Disconnect earth
links to the earthing stud. Withdraw the thermostat and thermal cut-out
capillary tubes from the pocket on the element plate.
5. Remove the element plate assembly by unscrewing the five securing
screws, tapped jacking holes are provided (NOTE: a quantity of water
may still be present in the container, it is recommended that a container
be placed under the unit to collect any spillage). 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.
6. Re-assemble the element plate assembly fitting a new sealing gasket.
Rewire the unit with reference to the Wiring Diagrams.
7. Re-commission the unit following the INSTALLATION and
COMMISSIONING instructions.

15
7.0 FAULT FINDING
WARNING: DISCONNECT FROM ALL ELECTRICAL SUPPLIES BEFORE
BEGINNING ANY WORK ON THE B3M OR C3M WATER HEATER. FLUID
CONTAINED IN THE WATER HEATER MAY BE VERY HOT!
The B3M & C3M unist should give trouble free operation, however should a
problem occour, the tables below should enable most faults to be identified
with ease.
Fault Finding should be carried out by a competent person and any replacement
parts used should be authorised Heatrae Sadia spare parts.
FAULT POSSIBLE CAUSES ACTION
Water not heating Electrical supply fault. Check electrical supply.
Thermal cut-out
tripped.
Check cut-out, if operated reset
and check thermostat operation.
If necessary replace.
Thermostat fault. Check thermostat operation,
replace if necessary.
Element fault. Check element for circuit
continuity and insulation
resistance. If faulty replace.
No water flow -
General
Cold water supply not
turned on.
Check mains water supply is on.
Blockage in cold
watter supply.
Check for obstructions.
No water flow
- Open Outlet
installations
Open outlet tapset
not correctly installed.
Check water connections to
tapset.
Blockage in tapset. Check for obstructions.
No water flow
- Cistern Fed
installations
Blockage in tapset. Check for obstructions.
Cistern tank empty. Check water supply to cistern
tank is turned on. Check
operation of cistern float valve.
Water flows
gradually reduces
- Cistern Fed
installations
Cistern not filling as
fast as outlet flow
rate.
Check water supply to cistern
tank is turned on and that the
inlet flow rate is equal to outlet
flow rate. Check operation of
cistern float valve.
Vent pipe blockage. check vent pipe for obstructions,
clear as necessary.

16
8.0 SPARE PARTS
The following comprehensive list of spare parts is available for your B3M or
C3M water heater. Please refer to the Rating Label on the side of your heater
before ordering to ensure the correct spare part is obtained.
DO NOT REPLACE WITH PARTS NOT RECOMMENDED BY HEATRAE
SADIA - THIS WILL INVALIDATE YOUR GUARANTEE AND MAY RENDER
THE INSTALLATION DANGEROUS.
DESCRIPTION CODE NO.
Element plate assembly - 30/50 litre 3kW ........95 606 926
Thermostat.......................................................... 95 612 667
Thermal cut-out ................................................. 95 612 666
Indicator light .....................................................95 607 995
Element plate gasket .........................................95 611 811
Terminal cover c/w thermostat knob.................95 614 184
15mm Push Fit Cap Nut .....................................95 607 996
Spout and adaptor .............................................95 604 212
9.0 ACCESSORIES
The heater can be used to supply only one outlet when used in an open
outlet installation. More outlets can be supplied in a cystern fed installation.
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.
Tap option packs J, K, M, P, Q, R or S can be used in place of the spout to
provide a single tap outlet. Flow rates will be at a reduced rate.
Note: In an Open Outlet installation it is normal for the spout to drip during
heating. This is due to expansion of water as it is heated within the unit,
it does not indicate a fault. DO NOT attempt to stop this dripping by
over-tightening the inlet tap as damage to the sealing washers or internal
operating mechanism will occur.

17
10.0 GUARANTEE
This water heater is guaranteed for a period of five years from the date of
purchase with the exception of the element and thermal controls which are
guaranteed for a period of two years provided:
1. The unit has been installed in accordance with these instructions and all
necessary inlet controls and safety valves have been fitted correctly.
2. Any valves or controls are of Heatrae Sadia recommended type.
3. The unit has not been tampered with and has been regularly maintained
as detailed in these instructions.
4. The unit has been used only for heating potable water.
5. Within 60 days of installation, the user completes and return certificate
supplied along with proof of purchase to register the product.
The unit is not guaranteed against damage by frost and the immersion heater
is not guaranteed against excessive scale build up. This guarantee does not
affect the statutory rights of the consumer.
11.0 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 benefits.
Insulation of the domestic hot water cylinder is by means of an approved
CFC/HCFC free polyurethane foam with an ozone depletion factpr of zero
and Global Warming Potential (GWP) of 3.1.
The B3M/C3M does not contain and substances harmful to health; it does
not contain any asbestos.

18
12.0 COMMISSIONING RECORD
Installation Date:____________________________________________
Model and Serial Number: __________________________________
Installer (Plumbing): ________________________________________
Contact Details: ____________________________________________
Competency Scheme & ID Number: _________________________
Installer (Electrical): ________________________________________
Contact Details: ____________________________________________
Competency Scheme & ID Number: _________________________
Comments: ________________________________________________
________________________________________________
________________________________________________
Mains supply pressure and flow rate
Isolation valve fitted
Pipework checked for leaks
Pipework bonded
Electrical connections checked
Thermostat locked
Thermostat setting
Water Temperature

19
13.0 SERVICE RECORD
Service Date:_______________________________________________
Engineer: ________________________________________________
Contact Details: ___________________________________________
Competency Scheme & ID Number: _________________________
Comments: ________________________________________________
________________________________________________
________________________________________________
Service Date:_______________________________________________
Engineer: __________________________________________________
Contact Details: ____________________________________________
Competency Scheme & ID Number: _________________________
Comments: ________________________________________________
________________________________________________
________________________________________________
Service Date:_______________________________________________
Engineer: __________________________________________________
Contact Details: ____________________________________________
Competency Scheme & ID Number: _________________________
Comments: ________________________________________________
________________________________________________
________________________________________________
Service Date:_______________________________________________
Engineer: __________________________________________________
Contact Details: ____________________________________________
Competency Scheme & ID Number: _________________________
Comments: ________________________________________________
________________________________________________
________________________________________________

14.0 SPARES STOCKISTS
For the fast and efficient supply of spares, please contact the stockists
listed below:
Electric Water Heating Co.
2 Horsecroft Place, Pinnacles
Harlow, Essex, CM19 5BT
Tel: [phone]
E-Mail: [email protected]
SPD
Units 9 & 10 Hexagon Business Centre
Springfield Road, Hayes, Middlesex, UB40 0TY
Tel: [phone]
Parts Centre
Tel: [phone]
www.partscentre.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 finder
at www.interpartspares.co.uk
Heatrae Sadia Heating
Hurricane Way Norwich NR6 6EA
www.heatraesadia.com
36005722_issue_04
SPECIFICATION ADVICE HOTLINE
t| 01603 420220
e| specifi[email protected]
AFTER SALE SERVICE
t| 0344 8711530
e| [e-mail]