Hamlet HSB 12 Manual

HSB Boiler Stove
HSB 12 Boiler Stove illustrated
BK505 Rev. 01
March 2012
Part No. AFS 1725
PLEASE RETAIN THIS GUIDE FOR FUTURE REFERENCE
Operating & Installation Manual

Congratulations on your choice of a Hamlet HSB Boiler.
More than 20 years experience has been put into the
development of our Solution Boiler family to ensure ultimate
performance and years of trouble free use and enjoyment
Every detail of the fire has been carefully designed and
engineered which is why we are so confident in the reliability
of our products
Should you have any questions about our Hamlet HSB
Boiler Stoves that are not covered buy our manual, please
contact the Hamlet dealer in your area, or call our technical
support department on 0844 8475107
Copyright 2012
Arada Ltd
This booklet has copyright and may not be
copied in whole or part, or used for any
purpose other than that for which it is supplied
without express written consent form.
HSB Boiler Stove
2
PLEASE NOTE— Arada has a policy of continuous product development and therefore we
reserve the right to amend the specification without prior notice.
Due to printing cycles, items or options may be described before they are generally available
or after they have ceased, so please check with your retailer or dealer.

Contents
HSB Boiler Stove
Page No.
INTRODUCTION
Important fuel notice 4
Safety Notice / Co Alarm 5
The Principle of the Fire 5
Asbestos 5
Electrical Connections 5
Check List 6
Technical Data / Data Plate 7
INSTALLATION
General Precautions 8
Handling 8
Hearth 8
Combustible Materials 8
Air For Combustion 8
Multifuel Grate & Grate Bars 9
Fire Bed Surrounds 9
FEDS inspection & fitting 10
Flue outlet and Hotplate 11
Flues and Chimneys 11-14
Integral Boilers 15
Checking the Thermostat 15
Typical Installation Examples for Boilers 16-17
Boiler Tapping Positions 18
Water Connections 19
Hot water System Check List 20
Final Installation Check List 21
(Building Control Consent Checklist)
Page No.
SERVICE & MAINTENANCE
Annual Maintenance 22
Cleaning 22
Chimney Sweeping 22
Door Glass & Outer Finish 22
Adjustment of Thermostat Damper 23
Adjustment of Door Hinges 24
Fire Door Rope Replacement 25
Fire Door Glass Replacement 26
Cleaning around Thermostat Damper 27
Service Record 28
OPERATING INSTRUCTIONS
Multifuel Grate 29
Air Inlet Controls 29
Easy Boost Air Slider 29
Operating Tool 30
Grate Riddling 30
Fuel Types 31
Lighting the Stove 31
Solid fuel & Longer Burning Periods 32
Over Firing, Chimney Fires 33
and Ash Removal
Optional Extra / Accessories 34
SPARE PARTS LIST 35-37
GUARANTEE 38
ADDITIONAL NOTES 39
FACTORY CHECK LIST 40
3

WARNING
IT IS A LEGAL REQUIREMENT THAT THE INSTALLATION OF ALL
NEW OR REPLACEMENT, WOOD OR SOLIDFUEL HEATING
APPLIANCES ARE REQUIRED TO OBTAIN BUILDING CONTROL
APPROVAL FROM YOUR LOCAL AUTHORITY OR THE
INSTALLATION WORK MUST BE CARRIED OUT THROUGH A
GOVERNMENT APPROVED COMPETENT PERSONS SCHEME
SUCH AS OPERATED BY HETAS.
IF IN DOUBT, CONTACT HETAS LIMITED
TELEPHONE NUMBER : 0845 634 5626
www.hetas.co.uk
THIS STOVE MUST NOT BE CONNECTED
TO A SHARED FLUE SYSTEM
TO ALL USERS
PETROLEUM COKE
SOME OF WHOSE BRAND NAMES ARE
‘CALCO’, ‘PETROCOKE’ AND ‘WONDERCO’
MUST NOT BE BURNED IN THIS APPLIANCE
BITUMINOUS HOUSE COAL
SHOULD NEVER BE USED IN YOUR STOVE
TO USE OTHER FUELS WILL INVALIDATE
THE APPLIANCE GUARANTEE
IF IN DOUBT CONTACT THE SOLID FUEL ASSOCIATION
TELEPHONE NUMBER 0845 601 4460
www.solidfuel.co.uk
HSB Boiler Stove
4

SAFETY
A fireguard conforming to BS 8423:2010 should be
used in the presence of children, the old or infirm.
Please note, this appliance should be used with
the fire door closed at all times except when
fuelling, de-ashing or initial lighting.
Do not use aerosol sprays or any other
flammable materials near the appliance
under fire.
Fire cement is caustic, hand and eye
protection should always be worn,
prolonged contact with the skin should be
avoided.
Arada Ltd will not be responsible for any
consequential or incidental loss or
injury however caused.
Before continuing any further with the
installation of this appliance please read the
following guide to manual handling.
 Always obtain assistance when lifting the
appliance.
 When lifting always keep your back straight,
bend your legs not your back.
 Avoid twisting at the waist. It is better to
reposition your feet.
 Avoid upper body/top heavy lifting. Do not lean
forwards or sideways when handling the fire.
 Always grip with the palms of your hands.
Do not use your fingertips for support, use
gloves for a better grip.
 Always keep the stove close to the body as this
will minimise the cantilever action.
CO ALARM
Building regulations require that whenever a new
or replacement fixed solid fuel or wood / biomass
appliance is installed in a dwelling a Carbon
Monoxide Alarm must be fitted in the same room
as the appliance. Further guidance on the
installation of the CO Alarm is available in
BS EN 50292:2002 and from the alarm
manufacturers instruction.
Provision of an alarm must not be considered
a substitute for either installing the appliance
correctly or ensuring regular servicing and
maintenance of the appliance and chimney
system.
THE PRINCILE OF THE STOVE
Your HSB Boiler Stove is built to the highest
standard of craftsmanship using the best materials
and most modern equipment available. It is a highly
efficient and sophisticated piece of machinery and
when properly installed and operated it should
provide a lifetime of heating satisfaction.
Safety is the most important consideration when
installing your fire. If not properly installed and
operated a house fire may result. Installation must
comply with the Building regulations and conform to
all safety standards.
Arada produce a variety of appliances ranging from
the traditional to the modern in style and appearance,
all bristling with ‘High Tech’ features.
The fire door is fitted with a special high temperature
ceramic glass panel through which the fire can be
viewed.
An internal throat plate produces turbulence to
encourage secondary combustion and direct the flue
gas around the whole upper firebox before allowing it
to escape up the chimney.
Arada stoves are also fitted with an ‘air wash’ so
called because it provides a curtain of high speed
preheated air behind the glass to help keep it clean
and provide secondary air /over draught.
The air inlets on the stove give a wide range of
primary / secondary air, under draught / over draught
combinations. The optimum setting will only be
established by experience in firing the appliance,
and will depend on the type of fuel, the position of
the appliance in the house, conditions of chimney
etc..
Asbestos
This stove contains no asbestos.
If there is a possibility of disturbing any asbestos in
the course of installation then please seek specialist
guidance and use appropriate protective equipment.
Electrical Connections
The installation of any electrical services during the
installation of this boiler and associated heating
system must be carried out by a registered
competent electrician and in accordance with the
requirements of the latest issue of BS 7671.
The design, installation and commissioning of any
water based heating system should be in accordance
with the following standards:-
BSEN12828:2003; BSEN12831:2003
BSEN14336:2004
HSB Boiler Stove
INTRODUCTION
5

CHECK LIST :
6
Inside the appliance body you should find the following:
Part Description & Visual Aid (not to scale) HSB 9 HSB 12 HSB 16
1. Fuel retainer
111
2. Grate bars
779
3. Lower FEDS cover
111
4. Flue spigot
1, ( 4" ) 1, ( 5" ) 1, ( 5" )
5. Hot plate
1, ( 4" ) 1, ( 5" ) 1, ( 5" )
6. Ash pan
111
7. Operating tool
111
8. Fire bed surrounds
223
9. Fire door handle
111
10. Instruction manual
111
11. Heat resistant glove
111
HSB Boiler Stove

7
TECHNICAL DATA
TECHNICAL DATA HSB 9 HSB 12 HSB 16
Nominal output to room ( kW ) 9816
Output to Water - Multi ( kW / BTU ) 9 / 30,000 12 / 40,000 16 / 55,000
Output to Water - Wood ( kW / BTU ) 7.5 / 25,000 9.5 / 32,000 13 / 44,000
Efficiency Net. (%) 74.3* 73.4* 71.8*
Mean Co Emission @ 13% O2 (%) 0.58* 0.47* 0.83*
Mean Flue Gas Temperature °C 358* 445* 475*
Minimum Distance to Combustible materials (mm)
Overall height 570 603 603
Overall Width 468 535 590
Overall depth 417 417 417
Height to centre of rear flue 431 452 504
Depth from back to centre of top flue 144 149 149
Flue diameter (mm / inch) 101 / 4” 127 / 5” 127 / 5”
Weight packed (Kg) 110 113 120
1 Kw = 3420 BTU, 1 inch = 25.4mm
HSB Boiler Stove
Stove Data
Plate:
Arada Stove Data Plate
Information
Arada stoves are fitted with a data plate
located on the bottom right hand side of the
stove, just below the riddling shaft as shown
in fig. a.
The data contained is as indicated in the
table above.
Fig. a
* These figures are obtained from our in house test facility designed and operated in
accordance with EN13240.
Side = 210
Rear = 230
Side = 225
Rear = 245
Side = 240
Rear = 250

HSB Boiler Stove
GENERAL PRECAUTIONS
Note - All local regulations, including those
referring to National and European stand-
ards need to be complied with, when in-
stalling the appliance. We strongly advise
that installation should only be carried out
by a qualified Solid Fuel Heating Engineer,
covered by the HETAS scheme (see page 12)
as installation by non-qualified persons may
affect the guarantee.
The building Regulations for England and Wales
2000 ref Approved Document J 2010 edition
(issued by the DTLR). The Building Standard
(Scotland) (Consolidation) Regulations. Detailed
recommendations for installation of Appliances,
chimneys and flues are outlined in the current
issue of the following British Standards BS6461,
BS8303 and BS4543.
Any manufacturer’s instruction must NOT
be taken as overriding statutory require-
ments.
During installation ensure that adequate
precautions are taken to avoid unnecessary risk
to yourself or any householder. In particular the
danger from the caustic nature of the fire
cement should be avoided by using these
accepted methods:
 Wear gloves when handling fire cement.
 Wear goggles when chiselling or looking up
chimneys
Make sure that Building Regulation are adhered
to during installation along with any local
by-laws. In the case of heating systems ensure
that the pipe work is correctly bonded to provide
a correct electrical earth.
HANDLING
By the time you read this you will appreciate the
weight of the appliance. The safety and handling
guidelines as set out on page 5 of this manual
should be followed.
To make movement easier, internal fittings, fuel
retainers, grate, flue outlets hot plate, throat
plate, etc., can be removed.
Care should be taken to make sure that the
hinges are not damaged during installation.
HEARTH
The stove should be installed on a floor with adequate
load-bearing capacity. If the existing construction does
not meet this prerequisite, suitable measures
(e.g. load distributing plate) should be taken to
achieve it.
Ideally, the appliance should stand on a constructional
hearth of non combustible materials not less than
125mm (5”) thick conforming to Building Regulations.
Dimensions of the hearth should project at least
300mm (12”) forward of the front of the appliance and
150mm (6”) at the sides.
The hearth surface should be free from combustible
materials. In most buildings with solid concrete or
stone floors, the requirement will be met by the floor
itself, but mark the perimeter of the hearth to ensure
floor coverings are kept well away or use different
levels to mark the hearth perimeter.
COMBUSTIBLE MATERIALS
A gap of at least 150mm (6”) should be allowed
between the appliance and any combustible materials.
Ideally, adjacent walls should be of suitable non
combustible construction, preferably brickwork.
In large fireplaces take care that any supporting beam
is protected by a 13mm (0.5”) thick sheet of
Masterboard / Supalux spaced 13mm (0.5”) off the
surface with strips of non-combustible material.
Make sure that there is a gap between an un-
insulated flue system and any combustible material.
This gap must be at least 3x the outside diameter of
the flue pipe, or 1.5x the flue diameter to non-
combustible surfaces. See illustration on page 14.
AIR FOR COMBUSTION
There must always be a permanent means of
providing air for combustion into the room in which the
stove is installed. A permanent vent with a total free
area of at least 550mm² for every kW rated above
5kW should be connected directly to the outside air or
to an adjacent room which itself has a permanent vent
of the same size direct to the outside air. The position-
ing of any air vent must be such that it cannot be
liable to blockage or obstruction.
Please refer to Approved Document J, Section 1
for detailed guidance.
Please note:
The fitting of an extractor fan to either of these
rooms is not permitted.
8
INSTALLATION

9
INSTALLATION
MULTIFUEL GRATE
The grate in the HSB Boiler Stove multi fuel
unit comprises of a series of reciprocating cast
iron bars seated on a pivoted comb. All bars in
the grate are identical, but every other bar is
turned though 180 degrees, with the ends of the
bars marked ‘H’ sitting on the high sections of
the comb, and the ends marked ‘L’ sitting on the
low sections.
ASSEMBLING THE GRATE
To assemble the grate, fit the bars to the low
section of the comb first, inserting the end
marked ‘H’ into the rear channel with groove on
the underside of the bar located on the up stand
tab, then lowering end marked ‘L’ onto the low
section of the comb. (See Fig. 1)
The upper bar is fitted in a similar manner, but
with the end marked ‘L’ inserted in the rear
channel, and the end marked ‘H’ seated on the
high section of the comb. (See Fig. 2).
GRATE BAR REPLACEMENT
After extended use it may be necessary to re-
place some of the grate bars. Periodic inspection
of the bars is recommended and the removal of
any nails or wire that may be present after
burning. All grate bars in each appliance are
identical and can be easily lifted out after the
removal of the fuel retainer. Remove damaged
grate bars and replace with casting of the same
type, fitting as per instructions above. When
re-ordering replacement grate bars, see page 35
of this manual for the correct part code.
Fig. 1 Fitting the grate bars
Fig. 2 Assembled grate
HSB Boiler Stove
FIRE BED SURROUNDS
Cast Fire Bed Surrounds are supplied with your HSB
Boiler Stove and should be fitted into the retaining holes
in the rear Grate Bar Support as shown in Fig a the num-
ber of surround castings is dependant on the stove size
and is detailed on page 6.
Fig a
Fire Bed Surround location holes
in the rear grate bar support.
Fig. b
Cross sectional view of the HSB Boiler
Stove showing Fire Bed Surrounds in place.

HSB Boiler Stove10
INSTALLATION
FEDS Inspection & Fitting
The HSB Boiler Stove is not fitted with a traditional throat plate as found in most integrated boiler stoves,
instead a highly efficient Flue Exhaust Diverter System is incorporated. This allows far more heat to be
absorbed by the boiler jacket, and reduces the overall amount of heat wasted by slowing the flue gasses
passage up the chimney. This in turn helps to reduce the overall fuel quantities required to produce a
given amount of hot water and radiated heat to your room.
As with traditional throat plate designs the FEDS needs to be checked regularly to ensure any build up of
ash and other debris produced by the burning of solid fuel is removed. The inner section of the FEDS is
welded in place during manufacture and requires nothing more than the removal of any residues produced
by the flue gases that may have built up on the surfaces. The outer FEDS should be removed from the
stove to allow access to the mounting bracket, and cleaning of the outer section.
Due to the construction materials the outer FEDS section is both light weight and easy to remove. The
outer section is removed by the following method:
With the stove door fully open, hold the bottom of the FEDS with both hands, palms on the bottom sloping
face. Push up firmly to release the FEDS from the retaining lugs (It may require a smart knock upwards
with the palm of your hand to release it.) Once clean and cleared of debris replace by following the
reverse of the above procedure.
IMPORTANT:
This procedure should only be carried out with the stove unlit and cold.
The FEDS System Retaining Lugs
Outer FEDS

11
INSTALLATION
FLUE OUTLET AND HOT PLATE
The flue spigot is found inside the appliance.
The hot plate is supplied fitted to the top
opening and is removed by turning clockwise as
is the flue outlet.
Smear a very thin layer of fire cement on the
surfaces of the flue outlet and hot plate, fit the
outlet to the appliance in the desired position.
Lock into place by rotating anti-clockwise and
tighten by tapping with a block of wood and
mallet from inside of the appliance. Similarly, fit
the hot plate to the unused opening. Clean off
any surplus fire cement.
Place appliance on the hearth and make sure
that it is level and does not rock.
Connect the chimney ensuring all joints are
sealed with fire cement.
FLUE AND SPIGOT FITTING
Note:
THE FLUE PIPE MUST BE FITTED INSIDE THE
OUTLET SPIGOT FAILURE TO DO SO COULD
RESULT IN THE SPILLAGE OF
CONDENSATION ETC. RUNNING DOWN THE
FLUE.
FLUES AND CHIMNEYS
The flue draw is critical on any installation and
should be checked to ensure that it matches what
is specified. If it is higher than recommended
provision must be made to correct the overdraw.
The draw can vary in different weather conditions
and the customer should be made aware of this.
Failure to correct an over-drawing flue will invali-
date the warranty, and may damage the appliance.
Please remember that chimney draught is
dependent on five main factors.
 Flue gas temperature.
 Flue height.
 Flue size.
 Flue terminal.
 Surrounding topography.
The stove must be connected to a suitable and
efficient flue that provides a good up draught to
safely take the products of combustion (fumes)
from the stove outlet to the outside air.
To ensure a good up draught it is important that
the flue gases are kept warm and that the flue
size suits the stove.
The termination of the outlet at the top of the flue
also needs to comply with Building Regulations.
The minimum effective height of the flue must be
at least 4.5 meters from the top of the stove to the
top of the flue outlet. When warm the flue draught
should be between 0.1 and 0.2mb (10-20 pa). A
chimney may comply with the regulations but still
be subject to down draught and similar problems.
A chimney terminating above the ridge level is
generally less likely to suffer such problems.
If a new chimney is being provided it should fully
comply with the relevant Building Regulations that
specify the requirements for solid fuel burning
installations.
Suitable types of chimney include the following.
Masonry chimney built with clay or concrete
liners, or a chimney block system. These types of
chimney should comply with and be installed in
accordance with Building Regulations and
BS EN15287: part1.
Factory made insulated chimney complying with
BS EN1856-1:2009 (often called ‘Class1 prefabri-
cated metal chimney’) and installed in accordance
with Building regulations and BS EN15287: parts 1
to 4.
HSB Boiler Stove
Inside
Flue
Pipe
Outer
Spigot

HSB Boiler Stove
INSTALLATION
Due to the gradual introduction of European
Chimney Standards chimneys will be specified
according to their performance designation as
defined in BS EN 1443 that covers the General
Requirements for chimneys. The minimum
performance designation required for use with solid
fuel burning stove is T450 N2 S D3
The flue and chimney installation must be carefully
checked by a competent person before fitting the
stove to ensure it is suitable and will work safely.
If the chimney is old (i.e. built of brick or stone with
out a liner) or being opened up for reuse additional
checks and smoke testing as described in Appendix
E of Approved Document J 2010 Edition should be
carried out to ensure the flue and chimney are in
good operating condition.
Unless the existing flue is in good condition with
suitable access for collection and removal of debris,
the flue size is more than 225mm (9”) diameter, or
200 x 200mm square, a suitable lining of 150mm
(6”) diameter should be fitted. If the flue length is
over 5.5metres one size larger than the appliance
outlet should be fitted (6” min.). This should be a
double skin stainless steel flexible flue liner that is
independently certified for use with solid fuel. Details
of suitable linings for use with wood and solid fuel
are given in the official HETAS guide that can be
viewed on their website at www.hetas.co.uk -
(Heating Equipment Testing & Approval Scheme.)
It is also important that a suitable flue pipe that
complies with the Building Regulations is used to
connect the stove to the flue in the chimney and that
suitable access is provided into the flue for regular
inspection and sweeping of the flue ways.
The installer should comply with the Building Regu-
lation requirements in respect of providing a notice
plate giving details on the chimney, Document J of
the building regulations for England and Wales is
available from The Stationary Bookshops and can
also be viewed at the following website:
www.planningportal.gov.uk/uploads/br/
BR_PDF_ADJ_2010.pdf
Details on the relevant Building Regulations and BS
British Standards are given in the ‘General
Precautions’ section of this manual.
Chimneys should be as straight as possible.
Horizontal runs should be avoided except where
the rear outlet of the appliance is used, in which
case the horizontal section should not exceed
150mm (6”) in length.
If the fire appears to be working hard but
produces very little output to the room it is likely
that excessive draw is present in the chimney,
and that heat is being sucked out of the appliance
and up the chimney.
If this is the case we recommend the fitting of a
draught stabiliser in preference to a flue damper,
in the interests of safety and efficiency.
FOR ALL APPLIANCES
Access for cleaning the flue should be
incorporated in the system other than through
the appliance (e.g. a soot door or access though
the register plate). Purpose made soot doors and
inspection lengths are available from manufactur-
ers of all flue system.
Ensure that the whole length of the flue can be
reached from the soot door.
Note: If the appliance is fitted with a draught
stabiliser or if one is fitted to the flue pipe or
chimney in the same room as the appliance,
then the permanent air entry opening (or
openings) should be increased by 300mm² for
each kW of rated output.
For advice on flues and chimneys contact :-
NACE (National Association of Chimney
Engineers): Telephone [phone]
Web address: www.nace.org.uk
Or
NACS (National Association of Chimney
Sweeps): Telephone [phone]
Web address: www.chimneyworks.co.uk
Or
HETAS (Official Body to Solid Fuel Domestic
Heating Appliances): Telephone [phone]
5626
Web address: www.hetas.co.uk
12

13
INSTALLATION
NOTE: Under no circumstances should this appliance be connected to
a shared flue system, that serves any other heating appliance.
Typical Rear Flue Outlet (As Per BS 8303-1)
HSB Boiler Stove
Minimum 150mm
(6”) Diameter Flue
Maximum 100mm
(4”)

HSB Boiler Stove
INSTALLATION
Typical Top Flue Outlet
(AS Per BS 8303-1)
Typical Metal Insulation Chimney System
Installed to the chimney manufacturers instructions in compliance with
Building Regulations and BS EN 15287 Pts 1 to 4
14
PLAN VIEW OF REGISTER PLATE AND
CLEARANCES FOR NON INSULATED FLUES
Steel register plate 1.5mm thick minimum

15
HSB Boiler Stove
INTEGRAL BOILERS
Integral boilers should be connected with flow
and return connections of any circuit on opposite
sides of the appliance, (cross flowed), to indirect
hot water tank/system, adding Fernox or similar
corrosion inhibitor to prevent corrosion and
formation of lime scale.
It is also essential that the water temperature
remains in excess of 45° centigrade (Celsius).
The gravity circuit return should be fitted with a
pipe thermostat, which will activate a cut-out on
the radiator circulating pump, should the
temperature fall below this level. (45°C)
Connecting pipe work to the boiler unit.
The connected pipes should be screwed to a
maximum depth of 19mm from the face of the
tapping boss, (1” BSP, parallel).
Steel integral boilers should only be connected to
an indirect hot water tank system
Note:
The flow and return sections of any circuit
must always be opposite to the appliance.
Remember to incorporate a draining plug/tap
at the lowest point to facilitate draining and
flushing.
Warning: If a pipe-stat is not fitted to control
the radiator circulation pump then cold water
corrosion can occur.
FAILURE TO COMPLY WITH THESE
REQUIREMENTS WILL INVALIDATE THE
GUARANTEE.
CHECKING THE THERMOSTAT AND
PRE-SETTING TO THE CORRECT
DAMPER PRESSURES
PLEASE NOTE:
The thermostat has been fitted and set correctly
during manufacturing. However it is advisable to
check the cold setting prior to lighting the fire for
the first time after installation.
With the control knob set fully clockwise (past
No.5) the circular damper plate should have a
gap of approximately 29mm between the damper
edge and the stove inner body face, measured at
the furthest point from the control knob and in line
with the actuation shaft. Take care to measure
this gap parallel to the actuation arm centre line.
If this is not the case follow the procedure as
detailed in the maintenance section on page 23.
CLEANING AROUND THE THERMOSTAT
For cleaning around the thermostat and removal
of ash build up see:-
Maintenance section page 27.
It is important to regularly clean around the
damper to avoid an ash build up to maintain
proper control of the burn rate.
INSTALLATION
Air inlet control thermostat
Easy Boost Start air inlet

HSB Boiler Stove
16
INSTALLATION
Central Heating and Domestic Hot water System Using Four Boiler Tapings
Central Heating Without Domestic Hot water System Using Four Boiler Tapings
Note: Diagrammatic representation only. Design and calculations for individual systems
should always be carried out by a qualified heating engineer.

17
HSB Boiler Stove
INSTALLATION
Central Heating and Domestic Hot water System Using Three Boiler Tapings
Central Heating Without Domestic Hot water System Using Three Boiler Tapings
Note: Diagrammatic representation only. Design and calculations for individual systems
should always be carried out by a qualified heating engineer.

HSB Boiler Stove
18
INSTALLATION
Boiler Tapping Positions
Dimensions (mm) HSB 9 HSB12 HSB 16
A260 328 326
B288 325 324
C255 252 252
D356 425 422

19
HSB Boiler Stove
INSTALLATION
WATER CONNECTIONS
Heating system
The size of the heating system that can be run
will depend on the output rating of the appliance.
It will be necessary to work out the heat loss
calculations for the system proposed in order to
establish the kW / Hr rating. An appliance that will
meet this figure should be chosen. (For boiler
outputs please refer to the sales brochures).
The constructional requirements of installing and
connecting the appliance also need to be taken
into account when selecting. Design calculations
for individual heating systems should be carried
out by a qualified heating engineer. In many
cases your supplier will be able to offer advice
and assistance.
Direct Systems
The HSB Boiler Stove is NOT suitable for con-
necting to Direct domestic hot water systems.
They are designed for use with Indirect vented
central heating systems only.
Indirect Systems
The Domestic Hot Water Circuit
To connect the indirect hot water cylinder use
28mm copper pipes. Ensure that the pipes rise
continuously to the cylinder.
Ensure that runs are not to long, i.e. 6 metres
maximum each for flow and return. Install the
cylinder above the level of the fire, and as close
to it as possible (within reason the higher the
cylinder the faster the circulation).
Ensure no valves are present in the pipes.
In addition to providing hot water the primary
circuit is essential in providing a ‘Heat Leak’
radiator to absorb excessive heat produced in the
event of the circulating pump shutting down.
Heat is produced in varying quantities while the
stove is alight and care must be taken to ensure
that effective circulation can occur around the
primary circuit to carry the heat away and thus
prevent boiling.
The output of any radiator installed as a ‘Heat
Leak’ should not be less than 10% of the rated
output of the appliance to which it is connected.
The radiator should not be fitted with a control
valve as it should never be turned off or down.
The hot water cylinder must be indirect with a
minimum capacity of 110 litres, conforming to
BS 1566 part 1.
A radiator of approximately 2 m² surface area
should be connected into the primary circuit.
If installed in the bathroom it provides a means of
drying towels in the summer.
Safety Vent Circuit
This circuit consists of a cold feed pipe and a
separate expansion pipe, and expansion tank.
The possibility that water in the stove boiler may
boil can never be completely ruled out, and it is
therefore vital to ensure that cold water can be
provided to the boiler and steam vented from it at
all times.
The expansion tank should have a capacity of at
least 7% of the systems total water capacity. The
cold water feed pipe should be at least 22mm in
diameter.
There must not be any shut-off valves in the
circuit. Pipes should be run so as to avoid air
locks. A safety relief valve should be fitted into
the expansion pipe close to the boiler. The
expansion pipe should not be branched off from
the cold water feed pipe to ensure it cannot be
blocked by any settlement matter originating from
the expansion tank.
It is often possible and good practise to utilise the
primary flow and return as part of the safety
circuit. The ball valve should be copper, the
overflow pipe from the expansion tank should be
28mm diameter copper. All pipes in unheated
spaces must be lagged.
Various installation examples can be seen on
pages 16 & 17.

HSB Boiler Stove
INSTALLATION
Temperature and Pressure Relief Valve
With solid fuel appliances it is not practical to
provide a sufficiently rapid reaction for shutting
down the fuel in the event of a sudden rise in
water temperature and a temperature valve or
preferably, a combined temperature and pressure
relief valve should be installed to operate in the
event of high water temperatures occurring.
See diagram below.
HOT WATER SYSTEM
Before handing over the installation to the
customer it is strongly recommended that the ap-
pliance is lit and the functioning of the chimney,
hot water and heating system is checked.
A checklist (Pre-Lighting checks) appears in the
Operating Instructions, but in addition to this the
installer should:-
 Operate the heating system and set the
pump head.
 Balance the radiators.
 Re-vent and ensure there are no air locks.
HOT WATER SYSTEMS
Is boiler cross-flowed? YES/NO
Are the pipes correctly sized? YES/NO
What is the calculated output required to
heat the system?
Is a heat leak fitted? YES/NO
What is the return water temperature?
Is the pump thermostatically controlled
by a pipe stat? YES/NO
What is the height and distance of the hot
water tank above the stove?
 Check the circulation round the primary
system and the heat leak radiator.
 Be sure that all the chimney is operating
and that ALL smoke and fumes are vented
to the atmosphere through the chimney
terminal.
 Check all joints and seals.
 Clean the outside of the appliance to pre-
vent any stains from becoming permanently
burnt on.
 Check the flue draught which should read
0.1 to 0.2mbar.
Hot Water system Check list
The following details MUST be checked and
completed in full by the installer at the time of
installation. Please answer all questions as fully as
possible. Arada Ltd. can not be held responsible
for the flue, chimney or for the stove installation.
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