Bubble B1 HALF POD MARINE OIL STOVE User manual

USER INSTRUCTIONS
B1 HALF POD MARINE OIL STOVE ©
ISSUE 1 @02-06-15
WARNINGS....................................................................................................................................................................................................................................... 3
INTRODUCTION...........................................................................................................................................................................................................................................3
FIRE GUARDING.............................................................................................................................................................................................................................. 3
DOOR GLASS.................................................................................................................................................................................................................................... 3
STOVE EXTERIOR........................................................................................................................................................................................................................... 3
BURNER POT..................................................................................................................................................................................................................................... 3
FASTENING DOWN. ...................................................................................................................................................................................................................... 3
HOW IT WORKS ...........................................................................................................................................................................................................................................4
CONTROLS........................................................................................................................................................................................................................................ 4
LIGHTING. ........................................................................................................................................................................................................................................ 4
STOVE COMPONENTS................................................................................................................................................................................................................... 5
RUNNING THE STOVE................................................................................................................................................................................................................................5
OIL CONTROL VALVE DETAILS ................................................................................................................................................................................................. 5
LIGHTING AND ADJUSTING...................................................................................................................................................................................................... 5
TWO WAYS TO LIGHT THE STOVE.......................................................................................................................................................................................... 5
1. LIGHTING INTO THE BASE OF THE POT........................................................................................................................................................................... 5
2. MANUAL LIGHTING THROUGH THE LIGHTING PORT................................................................................................................................................... 6
TURN THE OIL OFF........................................................................................................................................................................................................................ 6
EXCESS FLAMES DURING IGNITION...................................................................................................................................................................................... 6
CORRECT LOW FIRE RUNNING.................................................................................................................................................................................................. 6
CORRECT HIGH FIRE RUNNING................................................................................................................................................................................................. 6
NEVER TRY TO RELIGHT A HOT STOVE.................................................................................................................................................................................. 6
EXTINGUISHING THE STOVE ................................................................................................................................................................................................... 6
FUEL SUPPLY INFORMATION..................................................................................................................................................................................................... 6
FUEL GAUGE ..................................................................................................................................................................................................................................... 6
ISOLATION VALVE........................................................................................................................................................................................................................ 6
FUEL FILTER..................................................................................................................................................................................................................................... 7
SAFETY SHUT OFF VALVE........................................................................................................................................................................................................... 7
ISOLATION VALVE........................................................................................................................................................................................................................ 7
FLOODED POT.................................................................................................................................................................................................................................. 7
STOVES WITH BOILERS.............................................................................................................................................................................................................. 7
FAULT FINDING...........................................................................................................................................................................................................................................7
CHIMNEY PROBLEMS..................................................................................................................................................................................................................... 7
DOWN DRAFTING .......................................................................................................................................................................................................................... 7
ATMOSPHERICS.............................................................................................................................................................................................................................. 7
SUMMARY OF CHIMNEY PROBLEMS......................................................................................................................................................................................... 8
CHIMNEY HEIGHTS....................................................................................................................................................................................................................... 8
MINIMUM HEIGHT FOR LOW FIRE RUNNING..................................................................................................................................................................... 8
FUEL SUPPLY PROBLEMS .............................................................................................................................................................................................................. 8
WAXING ............................................................................................................................................................................................................................................ 8
CHANGING OIL PRESSURE AT THE STOVE. .......................................................................................................................................................................... 8

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POOR OIL FLOW PROBLEMS........................................................................................................................................................................................................ 8
OIL FEED SET UP............................................................................................................................................................................................................................ 8
OIL LINE ........................................................................................................................................................................................................................................... 8
WATER CONTAMINATION ......................................................................................................................................................................................................... 9
RACING .............................................................................................................................................................................................................................................. 9
FLUE VACUUM.................................................................................................................................................................................................................................. 9
BURNER SHUTS DOWN AND STOVE GOES OUT.................................................................................................................................................................. 9
OIL TRIP WILL NOT RESET ........................................................................................................................................................................................................ 9
BURNER WILL NOT COME TO HIGH FIRE.............................................................................................................................................................................. 9
OIL WILL NOT FLOW INTO THE POT..................................................................................................................................................................................... 9
OIL SMELLS.....................................................................................................................................................................................................................................10
BURNER RUNS SOOTY. ................................................................................................................................................................................................................10
BURNER DOES NOT LIGHT EASILY.........................................................................................................................................................................................10
OIL WILL NOT ENTER THE POT...............................................................................................................................................................................................10
(STOVES WITH BOILERS)..........................................................................................................................................................................................................10
OIL SMELLS.....................................................................................................................................................................................................................................10
DEFLOODING A FLOODED POT.................................................................................................................................................................................................10
OIL LEAKS........................................................................................................................................................................................................................................10
FAULT FINDING HEATING SYSTEM.....................................................................................................................................................................................................11
THE CIRCUIT DESIGN. ................................................................................................................................................................................................................ 11
AIR LOCKED CIRCULATING PUMP. ........................................................................................................................................................................................... 11
AIR LOCKED SYSTEM PIPEWORK. ............................................................................................................................................................................................ 11
INADEQUATE SYSTEM PRESSURE HEAD.............................................................................................................................................................................. 11
INOPERATIVE CIRCULATING PUMP. ....................................................................................................................................................................................... 11
INADEQUATE PIPE SIZEING. ................................................................................................................................................................................................... 11
INADEQUATE CALORIFYER DESIGN...................................................................................................................................................................................... 11
INADEQUATE STOVE LOCATION............................................................................................................................................................................................ 11
FLOW OF WATER THROUGH THE BOILER. ........................................................................................................................................................................... 11
FLOW OF WATER THROUGH THE CALORIFYER. ................................................................................................................................................................. 11
FLOW OF WATER THROUGH THE RADIATORS. .................................................................................................................................................................. 11
THE SYSTEM IS NOT OVER PUMPING....................................................................................................................................................................................11
LACK OF SAFETY VALVES. .......................................................................................................................................................................................................... 11
FEED AND EXPANSION (IS IT FITTED IN THE CORRECT PLACE.)............................................................................................................................... 11
ROUTINE MAINTENANCE.......................................................................................................................................................................................................................11
EVERY 4 WEEKS: ............................................................................................................................................................................................................................ 11
EVERY 8 WEEKS: ............................................................................................................................................................................................................................ 11
EVERY 24 WEEKS:..........................................................................................................................................................................................................................11
EVERY 12 MONTHS:....................................................................................................................................................................................................................... 11
EVERY 24 MONTHS:...................................................................................................................................................................................................................... 11
AS REQUIRED:................................................................................................................................................................................................................................ 11
WARRANTY.................................................................................................................................................................................................................................................11
ITEMS NOT COVERED BY WARRANTY.................................................................................................................................................................................... 11
PARTS LIST..................................................................................................................................................................................................................................................13

3
WARNINGS
1. Never try to relight a hot stove; wait until it has
cooled down, hot oil vapour is explosive.
2. Never try to light a flooded pot, when attempting to
light a stove make sure that the pot is not flooded
with oil, by looking into the base of the burner.
3. If it is flooded remove the excess oil as per
instructions in the fault finding section.
4. The stove must not be operated with the glass
front door opened or cracked, or without the lighting
port plug fitted.
5. Do not attempt to clean the stove door glass whilst
the glass is hot, make sure that the glass is completely
cool before cleaning.
INTRODUCTION
The stove is a heating unit which burns diesel oil in a
controlled manner utilizing a chimney to discharge the
products of combustion.
It will provide space or combined space and water
heating and is designed to be used on inland waterways
craft.
There are three versions of the stove.
Space heating only.
Space heating and a small boiler.
Space heating and a large boiler.
On the boiler versions there are 2 x 1" BSP female
sockets for water connections to be made.
Both boilers are high water content and suitable for
pumped or gravity systems, pressurised or open vented
systems, provided that the systems are correctly
designed.
The stove incorporates a removable front apron, which
is used to gain access for lighting after first opening
the front door.
On the right hand, lower side of the stove is a small
lever which should be rotated occasionally to descale
the oil inlet pipe.
The stove must be securely bolted down so that it can
resist impact or collision and it must be level in both
directions.
The top of the stove can be used for warming and
cooking providing that a suitable fiddle rail is fitted to
the top of the stove.
The stove can also be supplied with or without a coal
kit.
Just like a solid fuel stove, coal effect will only be
available when the stove is running at maximum or near
maximum performance which is 4kW OR 14,000 B.T.U,
s PER HOUR.
There are components in the stove which will need
replacing from time to time and these are -:
Upper catalyser (Burner component)
Lower catalyser (Burner component)
Flame ring (Burner component)
Descaling device packing’s. (This device is located
where the oil flow pipe goes into the burner pot)
Door glass.
Door glass seals.
Door rope seals.
There are components in the oil supply line which need
to be kept in good condition and serviced annually
For spacing from combustible materials the stove must
be treated in the same way as a SOLID FUEL
APPLIANCE and as such, whilst it is running, will
become very hot and must not be touched.
For safe distances from combustible materials see the
information contained in the Installer Literature.
FIRE GUARDING.
To prevent the risk of injury through burning a
suitable fireguard must be fitted and adequate
provision made for guarding the exposed flue pipe
where a potential danger is presented.
DOOR GLASS.
The door glass will require light cleaning occasionally
and the frequency of cleaning will depend upon how
often the stove is used.
Where stoves are ignited each day then the glass may
soot up as the lighting process may generate a little
soot until the stove has settled down into blue flame
combustion.
Where stoves are running continuously then the glass
will need cleaning less frequently but when cleaning is
required you will need to let the stove go out and
completely cool down
Use a soft cloth and slightly damp it with vinegar or a
proprietary stove glass cleaner
After cleaning wipe it dry.
STOVE EXTERIOR
To clean the stove externally
Let it go out and simply brush away any dust with a
very soft brush.
To clean the stove internally, use a soft brush to
remove any dust or combustion debris into a vacuum
cleaner hose.
BURNER POT
Occasionally scrape away any hard carbon deposits
from the bottom of the burner pot and remove debris
with a vacuum cleaner.
See service booklet for more info.
FASTENING DOWN.
7. The stove must be securely fastened down so that
it can resist impact or collision and it must be level in
both directions. Bolt down brackets are supplied.

4
HOW IT WORKS
The stove generates heat from burning oil mixed with
air in a vaporizing pot located in the bottom of the
stove.
Once lit, oil goes into the pot at a steady and
controlled rate via gravity flow, metered by the OIL
CONTROL VALVE the oil flow can be controlled from
minimum to maximum or any setting in between
determined by where you set the oil flow control knob.
Air is sucked into the pot by the natural action of the
negative pressure in the chimney and to allow the
chimney to work correctly it is essential that you have
adequate, unrestricted ventilation into the area where
the stove is situated.
The amount of oil that can be successfully burned is
directly proportional to the amount of air that the
chimney can draw into the pot and so to achieve
adequate combustion a balanced and appropriate flow
of both oil and air is required.
As stated earlier, the air side of the equation can vary
wildly with the changing performance of the chimney
and so to compensate for this the appliance has a built
in, combustion air restrictor, designed to maintain a
steady and constant supply of combustion air to the
burner.
The flow of oil into the pot can be adjusted via the
knob on top of extension rod rising up from the oil
control valve.
With the increased flow of oil, extra heat is
generated, which in turn stimulates the chimney to
work harder and consequently draw more air into the
pot to maintain an adequate fuel air ratio.
CONTROLS
The output of the stove is regulated by the amount of
oil allowed to go into it and this function is controlled
by the -:
OIL CONTROL VALVE (O.C.V.), which is situated at
the rear, right hand side of the stove.
Turning the knob anti clockwise controls the oil flow.
The knob is located at the top right hand side of the
stove and is calibrated from off position (fully
clockwise) through 6 graduations to maximum.
Controls for the stove will vary, depending on which
valve is fitted to it.
The valve could be a ships valve or a Toby valve.
The control for the dry stove comprises-:
Oil flow control only.
Oil valve trip lever
The boiler version has extra controls which are-:
Oil flow control
Oil valve trip lever
Thermostat control
Safety Stat reset control
The Toby oil control valve used on boiler stoves has a
built in, non electric, modulating thermostat control,
which will put the fire on to low fire when the target
temperature has been achieved.
In addition to this there is also a similar safety stat,
which will shut the burner down, should the water
exceed 80 deg C.
The safety stat re set control is lifted to reset the
valve, should the stat trip. Details of this are provided
in the valve booklet supplied with the stove.
The Toby valve has to be tripped into action by lifting
the trip button at the left hand side of the control
panel.
The flow of oil into the pot can be adjusted via the
larger knob on top of the extension rod rising up from
the oil control valve.
LIGHTING.
WARNING FOR BOILER STOVES.
If the stove is fitted with a boiler, air locks or poor
water flow through it may cause damage.
Make sure that the boiler has been vented of all air
BEFORE ATTEMPTING TO LIGHT THE STOVE.
Lighting the stove takes a little time and patience; the
following procedure should be adopted.
Open the front door.
Remove the coal kit if it has been supplied with the
stove.
Remove the inner catalysers and burning ring.
Turn the oil on at full rate and allow oil to flow into
the bottom of the pot to form a pool about the size of
a small digestive biscuit and then turn the oil off.
Do not allow any depth of oil to build up in the base
of the pot.
Light a small piece of firelighter (about the size of a
pineapple chunk) and place it into the centre of the
pot.
Replace the lower burning ring, the mesh catalyser and
the coal kit and then leave the door slightly open
whilst the firelighter gets the oil going.
After 30 to 40 seconds, you will notice the flame start
to establish itself and spread around the bottom of
the pot.
When this occurs, close the door and turn the oil on to
its minimum setting.
After two or three minutes the flame should then
slowly change from yellow into blue flame combustion
and settle down to a steady burn.
Note there may be the occasional growl or audible
vibration whilst the burner settles down into blue
flame combustion.

5
Allow the burner 10 – 15 minutes to stabilise and the
increase the flow of oil as required, moving by one
increment of the dial only.
Do not leave the appliance unattended during the
lighting and stabilising procedure.
THE OPTIONAL COAL KIT
The coals are located on the coal support bars, which
are designed to glow red in the flame, passing on the
incandescence into the coals.
The front fret is designed to allow incandescent glow
and flicker through to add to the effect.
Care must be taken when positioning the coals on the
spikes.
The whole system is designed so that it can be
removed in its entirety without the need to disturb
the coals making routine leaning and servicing very
easy.
To remove it, turn the stove off and when it is cooled
down, undo the front door knob, open the door and lift
it out using the front fret.
Take care not to drop any coals into the pot.
STOVE COMPONENTS
The stove has the following components, which can be
removed for cleaning or servicing.
The front door can be opened beneath which is a small
apron covering the front of the burner pot.
The apron can be lifted off to reveal access to the
lighting port cover.
The inner burner components generally consisting of a
burner ring, upper catalyser and lower catalyser.
On the lower right hand side of the stove is the
descaling device lever.
This lever is used for descaling carbon build up from
the inside of the oil inlet connection.
This lever should be rotated occasionally to clean away
any carbon build up.
The descaling device has a gland packing nut which
must be tightened occasionally to stop oil fume leak.
The sealing gland will need to be replaced every
second year.
NOTE WELL
The descaling lever must not be touched whilst the
stove is running, it gets very hot and if touched will
cause burns.
RUNNING THE STOVE
We use different valves on dry stoves as opposed to
stoves with boilers, you will note that the appropriate
valve information is supplied with each stove as a
separate leaflet.
OIL CONTROL VALVE DETAILS
The output of the stove is regulated by the amount of
oil allowed to go into it and this function is controlled
by the:
OIL CONTROL VALVE (O.C.V.), which is situated at
the right hand side of the stove, behind the right
hand side panel.
On dry stoves the oil flow is controlled by turning the
knob anti clockwise from its off position.
The knob is located at the top right hand side of the
stove and is calibrated from off position (fully
clockwise) through 6 graduations to maximum.
LIGHTING AND ADJUSTING
TOBY VALVES
When attempting to light the stove these are the
rules, which must be followed.
Always make sure that the pot is not flooded with
oil by looking down into the base of the pot.
Never try to light the stove if it is flooded with
oil.
Do not light the stove and then leave it
unattended, until it is settled down and stabilized
into blue flame combustion on low fire.
(This will take approximately 10 minutes.)
TWO WAYS TO LIGHT THE STOVE
Through the lighting port.
Through the front door, directly into the base of the
pot.
1. LIGHTING INTO THE BASE OFTHE POT
Always make sure that the pot is not flooded with oil.
On the first light up you may find the first option
easier, as you can see the oil trickle in to the pot more
easily.
You must use a heatproof glove when putting the
catalysers back into the pot and it is important to
replace them quickly whilst the flame is small.
Make sure that the oil is turned off and make sure
that the oil safety cut off knob is lifted (tripped on)
via an audible click , if there is no click then the valve
will be in a cocked on state. LIFTING THE TRIP
APPLIES TO TOBY VALVES
Open the front door.
Carefully remove the coal kit. (Note this is an optional
extra and only supplied if ordered.)
Remove the upper catalyser and ring,
Remove the lower catalyser,
Turn the oil on and allow a small pool of oil to flow into
the pot about the size of a small biscuit, and then
turn the oil off.
Light a small piece of firelighter and drop it into the
oil, replace the catalysers and coal kit, and close the
door.

6
Wait for approx 1 minute until the pool of oil is alight
and then turn the oil on to minimum setting no 1.
Watch the appliance for a few minutes and you will see
the flame establish and settle down into blue flame
combustion.
Allow the burner to run for a further 10 minutes
before turning the appliance up to the higher settings.
If at any time during the ignition process large
amounts of flame can be seen, turn the oil off
immediately and wait until the flames die down
before putting the oil on again at minimum setting.
2. MANUAL LIGHTING THROUGH THE LIGHTING PORT
Always make sure that the pot is not flooded with oil.
Make sure that the oil is turned off and make sure
that the oil safety cut off knob is lifted (tripped on)
via an audible click , if there is no click then the valve
will be in a cocked on state.
Open the front door.
Remove the lighting port plug by pulling it out of its
tubular socket.
Turn the oil on to the first position via the flow
control knob and allow a small pool of oil to flow into
the pot about the size of a small biscuit.
TURN THE OIL OFF.
Cut a small piece of firelighter and stab it onto the
spike.
Light it and push it into the lighting port tube, let the
firelighter drop off the spike into the bottom of the
pot.
Replace the lighting port plug back into the tube and
close the cover.
Close the front door.
Wait for approx 1 minute until the pool of oil is alight
and then turn the oil on to minimum setting no 1.
Watch the appliance for a few minutes until it settles
down into blue flame combustion.
Allow the burner to run for a further 10 minutes
before turning the appliance up to the higher settings.
If at any time during the ignition process large
amounts of flame cane be seen, turn the oil off
immediately and wait until they die down before
putting the oil on again.
EXCESS FLAMES DURING IGNITION
If at any time during the ignition process large
amounts of flame can be seen, turn the oil off
immediately and wait until they die down before
putting the oil on again.
When the burner has been running for ten to fifteen
minutes move the oil flow control knob round to
position 3 and leave for another ten minutes after
which it will be safe to run the burner up to full
output.
CORRECT LOW FIRE RUNNING
When the burner is running correctly on position 1
(LOW FIRE) the lower catalyser will be glowing dull
red with little blue flames shooting into the lower
catalyser. The blue flames should just be showing over
the top of the lower catalyser.
Keep an eye on the low fire and if a dirty yellow flame
can be seen in the bottom and to one side of the
burner pot, call back your service man to re adjust the
oil flow.
CORRECT HIGH FIRE RUNNING
When the burner is running correctly on high fire the
flame picture should comprise of a large conical blue
flame just tipping with little yellow tips, the blue cone
should be approc150 -170mm above the top of the pot.
Stoves with Coal Kit
On full output, after approximately ten minutes, the
coals should begin to glow red and there should be
wispy blue flames licking through them.
To get the maximum effect the stove will need to be
left for half an hour or so, if there are a lot of yellow
flames call back your service man to re adjust the oil
flow, a few yellow flames are acceptable.
Excess oil flow, poor flue vacuum, bad coal positioning
or bad lighting technique can all contribute to rapid
sooting of the glass and coals.
NEVER TRY TORELIGHT A HOT STOVE
NEVER TRY TO RELIGHT A HOT BURNER, MAKE
SURE THAT THE BURNER IS COMPLETELY COOLED
DOWN BEFORE RE LIGHTING.
EXTINGUISHING THE STOVE
Shutting the burner off is a very simple manoeuvre.
Turn the oil flow control knob FULLY in a clockwise
direction until you feel it stop in its off position.
After a few minutes, the flame will die down and
eventually extinguish itself.
DO NOT TOUCH THE STOVE UNTIL IT HAS
COMPLETELY COOLED DOWN.
NEVER TRY TO RE LIGHT A HOT BURNER, MAKE
SURE THAT THE BURNER IS COMPLETELY
COOLED DOWN BEFORE RE LIGHTING.
FUEL SUPPLY INFORMATION
Your Fuel is stored in an oil tank, which should
incorporate the following features.
FUEL GAUGE
A fuel gauge, which can be in the form of a numbered
circular dial or a site glass into which oil is fed so as to
indicate the amount of oil in the tank.
ISOLATION VALVE
A manually operated isolation valve on the tank,
usually a gate valve.

7
FUEL FILTER
A fuel filter, to filter out any small particles of dirt or
contamination, which may get into the oil or tank.
SAFETY SHUT OFF VALVE
An automatically operated safety valve designed to
shut off the oil supply should a fire occur near to the
stove.
ISOLATION VALVE
A manually operated isolation valve near to the stove
to allow you or the service man to turn the oil off
should the need arise.
If you allow the stove to run the oil tank dry it will
obviously go out.
Before filling the fuel tank you must make sure that
the oil valve is tripped to it’s off position, otherwise
the pot will flood.
FLOODED POT
If the pot floods do not attempt to light the stove
until the excess oil has been removed from it.
STOVES WITH BOILERS
1. Stoves with hot water boilers are run in exactly the
same way as stoves without.
There are extra controls, which are detailed in the oil
valve booklet supplied with the stove.
FAULT FINDING
CHIMNEY PROBLEMS
The fitting of any appliance, solid fuel, wood or oil
burning, requiring a naturally generated chimney
vacuum, into a traditional narrow boat creates specific
problems, which are mainly concerned with flues
amongst other things.
Normally when fitting stoves into houses or bungalows
although there are many problems, generally if the
chimney comes out of the highest point of the
property (normally the ridge of the highest roof)
stoves will work well in most normal cases.
With boats the two major problems are -:
They move
By the nature of their shape, must have relatively low
chimneys.
Whilst on the move the boat will travel through a
variety of changing countryside which will have a
dramatic effect on the atmospherics at the chimney
terminal.
An example of this would be the transition of a boat
down through a lock where the wind conditions at the
outlet of the chimney will change dramatically as the
boat descends into the lock to the lower water levels,
severe down draught could occur.
Great care must be followed with chimneys on boats
and it is critical to observe the following instructions.
To try and ensure satisfactory performance from the
BUBBLE stove chimneys must be capable of
maintaining a constant steady vacuum of not less than
.04" Water Gauge when running on the high fire
position and not less than .02" Water gauge when
running on the low fire position; at all times and in
all terminal conditions.
This obviously means that it is essential to fit a
suitable anti down draft device to the terminal of the
chimney.
Anti down draft terminals come in a variety of designs
and it may be that trials will have to be made using
more than one design to establish which of the
different designs is more suitable to deal with a
particular problem.
The chimney vacuum is directly proportional to the
following factors:
The height of the chimney.
The resistance of the chimney. (Bends. terminals. etc.)
The cross sectional area of the chimney (diameter)
The Flue gas temperature.
The availability of replenishment air (ventilation)
The integrity of the chimney (does it leak)
DOWN DRAFTING
The contents of the chimney are equal to a cylinder of
hot air which depending upon its temperature and
volume wants to move vertically, with some force.
Stopping it moving vertically are resistances such as:
Smoothness of internal wall of chimney.
Chimney bends.
Chimney terminals.
Lack of ventilation. (Air going out must be replaced by
air coming in).
ATMOSPHERICS.
Atmospheric conditions at the chimney terminal that
could be affected by where the boat is moored.
The boat is moored in a position near to high buildings,
high trees or higher surrounding land and down
drafting is occurring.
This can be a serious problem, if there are any of the
above in the immediate location (within 100 –200
yards) of the boat.
Under changing and fluctuating wind conditions down
drafting will occur.
If you have to moor in situations where the above-
mentioned criteria exist, and the stove is running, you
must let it go out and wait until the offending wind
conditions die down before re lighting the appliance.
Don’t leave the appliance running and unattended.
Don’t leave the appliance in running overnight.

8
SUMMARY OF CHIMNEY PROBLEMS
Hot air in large volumes = plenty of chimney pull.
(Vacuum)
Cold air in small volumes = little chimney pull.
Bends and chimney terminals create resistance to hot
air flow thus reducing potential maximum chimney
vacuum.
Because it is not possible to use high chimneys it is
critical to observe the following instructions.
The chimney system must be designed so as to be
easily extendible.
The chimney can have a minimum inside diameter of
90mm.
Outside the boat, the chimney should be twin wall and
insulated to keep the flue gasses as hot as possible.
The chimney and stove must be adequately guarded to
prevent the risk of injury through burning.
When moored extend the chimney if you want the
appliance to be run at its maximum output, if you are
happy with the output of the stove running at up to
setting 3, then it will not be necessary to add the
chimney extension.
The chimney terminal must be fitted with a terminal
that will resist down drafting in all terminal conditions.
CHIMNEY HEIGHTS.
MINIMUM HEIGHT FOR HIGH FIRE RUNNING IS
2.2 METRES (long extension)
When cruising reduce the chimney height and turn the
stove down to match the reduced chimney height.
Do not cruise with the stove turned up on full output.
MINIMUM HEIGHT FOR LOW FIRE RUNNING
MINIMUM HEIGHT FOR LOW FIRE RUNNING IS
1.8 METERS. (Short extension)
When mooring pay particular attention to the
surroundings and remember that close objects such as
high buildings, trees or adjacent walls may well cause
down or up draughting.
Typical flue set ups can be seen in the illustrations
showing the flue pipe fitting into a standard cast iron
deck flange topped of with a traditional twin wall
chimney, terminating with a rotating cowl.
FUEL SUPPLY PROBLEMS
There are several problems relating to fuel supply of
which you need be informed.
WAXING - TRIM – ROLL
WAXING
Diesel has a nasty habit of waxing up when the
temperature gets down to or lower than freezing,
This waxing or thickening alters its flow
characteristics and consequently what was an
adequate fuel feed supply can rapidly turn into an
inadequate one when the temperature starts to fall.
The worst scenario is fuel feed pipe 50-60 feet long in
8mm dia. pipe.
The best-case scenario is a fuel pipe 4 feet long in
15mm dia with good insulated lagging.
CHANGING OIL PRESSURE ATTHE STOVE.
Because of the layout of a boat it is not possible to
provide a high pressure oil supply, in most cases a
pressure head of out 18" is all that is available and as
the tank empties this head of pressure will reduce,
and may alter the flow characteristics of the fuel.
In some cases this head can also be affected by the
ballast or trim of the boat, the changing level of the
boat due to addition removal of ballast, fuel or water
can have an effect on the position of the oil tank in
relation to the stove and the angle at which the oil line
is established.
Take great care to monitor all the effects of the
different ballast and trim possibilities.
Make sure that adequate oil feed is always available at
the outlet end of the fuel pipe before it enters the oil
control valve at the stove.
POOR OIL FLOW PROBLEMS.
Bubble stoves have a very accurate oil flow control
valve, which is set up to give a precise oil flow at high
and low fire.
For example the stove is flow rated at 4cc per minute
on low fire and 10cc per minute on high fire.
The test flow through the supply pipe should be well in
excess of the maximum flow rate of 10ccs even when
the temperature is below freezing and the boat is
adversely trimmed.
OIL FEED SET UP.
If the stove is fitted forward at the bow end of the
boat, to keep the oil feed supply as short as possible; a
forward mounted oil tank is recommended.
The tank should have insulating material around it for
protection from the effects of cold weather.
Always add a suitable proprietary antifreeze additive
to the stove fuel for wintertime running, your fuel
supplier should be able to advise you about fuel
additives.
The tank should have conveniently sized filler and it
must be vented.
The tank should have:
An isolation valve before an easily replaceable
cartridge filter.
OIL LINE
The oil feed line starts after the fuel filter and
proceeds to the point of entry, where the oil line goes
into the cab of the boat, at this point there will be a
remote sensing fire valve which is designed to do two
jobs:-

9
Shut off the oil supply should a fire occur near to the
stove. (Fire safety valve)
Shut off the oil supply should the flame be blown out.
(Flame failure device)
This valve has a reset button, which allows you to re-
cock the valve should it trip off.
The fire valve has a capillary tube on the end of which
is a temperature sensitive phial; the phial is fitted into
suitable pipe clips, near to the bottom of the stove.
The sensing phial should be positioned so that if down
drafting occurs, hot air flowing out of the burner will
heat up the phial and trip the remote sensing valve,
automatically closing down the fuel supply to the
appliance.
In this case the valve is acting as a flame failure
device.
The oil control valve also acts as a further safety
device in as much as it cuts off the supply of fuel
after a flame out.
If the bubble stove is fitted up to the first bulkhead
the isolation valve may well be fitted outside the cabin
or saloon of the boat and you should make sure that
you know where it is and how to operate it.
Because of the high risk of fuel contamination with
water, we strongly recommend the fitting of a high
volume water trap in the oil supply line.
If there is a water trap fitted, make sure that you are
fully familiar with its operation and service
requirements.
In case of emergencies, a suitable and serviceable fire
extinguisher should always be readily accessible near
to the appliance.
WATER CONTAMINATION
A major problem on boats is water contaminated fuel.
Because of changing temperature, condensation
droplets can build up on the inside of the fuel tank.
These droplets along with other sources of water
contamination can cause a serious problem if not
attended to.
Always keep an eye out for water in the oil.
Make sure that you check the filter bowl regularly.
If your stove is fitted with a Toby DVR oil control
valve, it can be drained off without removal from the
appliance.
The small drain screw is located at the bottom of the
valve.
RACING
Audible vibrations generated by the flame caused
allowing by too much oil in the pot, too quickly.
Turn off the oil flow until the burner has settled down
to a steady burn rate and then turn the fuel on again
but don’t let the flame go out otherwise the burner
MUST be allowed to cool down fully before a re-
ignition is attempted.
FLUE VACUUM
The pot type burner is extremely sensitive to flue
vacuum variations.
Good combustion will not be possible unless our
instructions on chimneys and flue vacuum are followed.
If the burner does not burn with a blue flame, recheck
the chimney vacuum and oil flow rate.
If the burner does not run well check that the seals in
the stove are good and that there is no ingress of air
into the appliance flue ways.
Check that the correct fuel oil is being used.
Check the levels.
BURNER SHUTS DOWN AND STOVE GOES OUT
Oil tank empty
Oil in tank at low level.
Water temperature safety stat shut
down. (Optional equipment)
Secondary float chamber in oil control
valve flooded
Safety trip button accidentally caught
and tripped off.
Fire valve tripped off.
Damaged oil feed pipe.
Height of oil control valve has been
disturbed.
OIL TRIP WILL NOT RESET
Water temperature safety stat shut
down.
Secondary float chamber in oil control
valve flooded. (Call serviceman)
BURNER WILL NOT COME TO HIGH FIRE
Water temperature has reached the
required setting and is under the
control of the thermostat.(Optional
equipment)
Oil in storage tank is low or about to
run out.
Height of oil control valve has been
disturbed.
OIL WILL NOT FLOW INTO THE POT
Oil tank empty
Water temperature safety stat shut
down. ( Optional equipment)

10
Secondary float chamber in oil control
valve flooded.
Safety trip button accidentally caught
and tripped off.
Fire valve tripped off.
Damaged oil feed pipe.
Height of oil control valve has been
disturbed.
OIL SMELLS
Generally slight oil leaks in the appliance may only be
noticed when the appliance is turned off, as the oil
vapour will normally be drawn into the appliance and
vented off through the chimney.
Do not attempt to light the appliance if there is any
trace of oil smell near or around the appliance.
If the appliance is running and there is an oil smell,
turn the appliance off and investigate or call a service
engineer.
The descaling device has adjustable packing, which
may need to be tightened up after first undoing the
lock nut
If this does not work then you will need to replace the
gland packing, which is available as a service item from
your supplier.
BURNER RUNS SOOTY.
Comments made on this subject assume that the
appliance has been running normally for some time.
If the stove soot’s up this indicates that there is not
adequate air for blue flame combustion or there is an
excess of fuel.
Check that the chimney is working correctly. (This
means pulling enough air into the burner to allow
correct blue flame combustion to occur.
Check that the fuel is the correct type and quality.
Check that the flow rates are correct.
Where burners are incorrectly installed and are
allowed to run at high fuel flow rates on low chimney
vacuums, long unsatisfactory yellow flame combustion
and bad sooting will occur.
To rectify this problem call your service engineer.
Never switch from low settings straight up to high
settings, a longer burner life will be achieved if the oil
flow control knob is moved only by one number at a
time leaving approx. two minutes between each setting
change.
BURNER DOES NOT LIGHT EASILY
Read the instructions in the lighting section of this
publication.
OIL WILL NOT ENTER THE POT
All stoves
1. Is there oil in the fuel tank?
2. Has the fire valve tripped?
3. Has the isolation valve been accidentally turned
off?
4. Is the oil turned on at the oil flow control knob on
the valve?
6. Is the oil feed pipe from the valve to the pot
blocked? (Unlikely)
(STOVES WITH BOILERS)
Operating oil flow rates
OIL Flow rates in cc per minute.
min max
4cc 10cc
Oil Flow Rates In litres per hour.
.24 litres .6 litres
Oil Flow Rates In litres Per 24 hours.
5.76 litres 14.4 litre
Oil Flow Rates In litres Per 7 x 24 hours.
40.32 litres 100.8 litres
To achieve optimum burner performance at these flow
rates you will need to have matching flue vacuums as
stated.
OIL SMELLS
Visual check on all joints for obvious leaks.
Check that the descaling lever packing gland nut is
adjusted.
DEFLOODING A FLOODED POT
If the stove is blown out by severe down drafting oil
will run into the pot to a depth of approx 15mm and
then stop. If this has occurred do not attempt to light
the pot until it has been de flooded.
To carry out this procedure you will need:
A small, leak proof plastic bag.
A small sponge.
A larger plastic bag for disposal of the residue.
A pair of disposable plastic gloves.
Put a small plastic bag into the stove and sponge from
the pot into the bag, when the excess oil has been
removed put the plastic bag and sponge into another
plastic bag and dispose of it.
OIL LEAKS
If the stove has blown out, flooded oil should not leak
from the pot, if it has leaked into the drip tray it will
have come from the descaling seal or the boat could
have been subject to heavy movement causing the oil
to splash around and leak through the air holes in the
side of the pot.

11
FAULT FINDING HEATING SYSTEM
If the system does not perform well check the
following-:
THE CIRCUIT DESIGN.
AIR LOCKED CIRCULATING PUMP.
AIR LOCKED SYSTEM PIPEWORK.
INADEQUATE SYSTEM PRESSURE HEAD.
INOPERATIVE CIRCULATING PUMP.
INADEQUATE PIPE SIZEING.
INADEQUATE CALORIFYER DESIGN.
INADEQUATE STOVE LOCATION.
The stove is fitted out of level, allowing an air pocket
to build up in the top of the boiler, causing subsequent
kettling and damage to thermostat sensing phial.
FLOW OF WATER THROUGH THE BOILER.
FLOW OF WATER THROUGH THE CALORIFYER.
FLOW OF WATER THROUGH THE RADIATORS.
THE SYSTEM IS NOT OVER PUMPING.
LACK OF SAFETY VALVES.
FEED AND EXPANSION (IS IT FITTED IN THE
CORRECT PLACE.)
ROUTINE MAINTENANCE
EVERY 4 WEEKS:
Operate the descaling lever by turning it completely
two or three times.
Clean inside of door glass.
EVERY 8 WEEKS:
Clean the burner completely by removing all the inner
components as follows,
Open the front door via the circular brass knob.
Remove the optional coal kit if it has been supplied
with the stove.
Remove the inner catalysers and flame ring.
Scrape the bottom of the pot clean and remove all
carbon build up.
Reassemble in the reverse order.
EVERY 24 WEEKS:
Tighten up the gland nut on the descaling device to
stop oil smells.
EVERY 12 MONTHS:
Have your service man replace or clean all the filters
in the oil supply line.
EVERY 24 MONTHS:
Have your service man clean out the filter and check
the function of all the safety equipment associated
with the stove, oil supply and plumbing system.
Remove and clean out the oil supply pipe from the valve
to the pot.
AS REQUIRED:
Keep the Coals, Coal kit, and burner inners in good
condition, replace as necessary.
WARRANTY
Fill in the warranty form and returned it to us, the
information recorded on the warranty form helps us to
deal with any problems you may encounter.
Where we do not hold returned warranty forms
replacement parts would only be issued when we are
sure that the appliance has not been damaged by
improper use or installation.
The warranty covers PARTS ONLY for a period of
ONE YEAR from the date of purchase and is
conditional upon all the requirements of our
installation instructions being fully adhered to.
ARRANGE FOR SERVICE visits with a service
engineer.
COPYRIGHT HARWORTH HEATING LTD 20.10.00
ITEMS NOT COVERED BY WARRANTY
DOOR GLASS
LABOUR COSTS.
TRAVELING COSTS.
CONSEQUENTIAL LOSS.
CONSEQUENTIAL DAMAGE.

12

13
PARTS LIST
DESCRIPTION
QTY
PER
STOVE
PART NO
SPECIFIC PARTS DRY STOVE
DRY STOVE FIREBRICK KIT COMPRISING OF :-
1
DRY STOVE SIDE BRICKS
2
DRY STOVE BACK BRICK
1
BAFFLE PLATE ASSEMBLY (means including fastener)
1
DRY STOVE OIL VALVE ASSEMBLY
1
78-01-008DRY
REAR HEAT SHIELD
SPECIFIC PARTS SMALL BOILER STOVE
SMALL BOILER ASSEMBLY
1
92-20-102A
SMALL BOILER BACK NUTS
2

14
SMALL BOILER STOVE OIL VALVE ASSEMBLY
1
SMALL BOILER STOVE FIREBRICK KIT
1
REAR HEAT SHIELD FOR SMALL BOIER STOVE
SPECIFIC PARTS LARGE BOILER STOVE
LARGE BOILER ASSEMBLY
92-20-105A
TOBY VALVE TO ACCEPT AQUASTAT 35 SEC 4/13
1
78-01-008WET
AQUASTAT ZW12 (3904011)
1
78-01-008C
SLEEVE (FOR AQUASTAT) ZW12 (3904012)
1
78-01-008D
REAR HEAT SHIELD FOR LARGE BOILER STOVE
1
COMMON PARTS FOR ALL STOVES
COMMON POT ASSEMBLY COMPRISING :-
1
87-01-501A
LIGHTING PORT TUBE PRE FITTED TO THE POT
1
87-01-501-T8
LIGHTING WICK HOLDER (LONG 8KW)
1
87-01-100H2
POT
1
905317-B
LOWER CATALYSER
1
194403-B
UPPER CATALYSER
1
194401-B
RING
1
198205-B
DESCALING DEVICE
1
119216-B
M5 POT NUTS
4
77-02-006-D
CONTROL ROD ASS
1
FLUE COLLAR (100MM)
1
303829-EF-B
REAR DAMPER (5")
1
78-01-200
OIL FEED PIPE FROM VALVE TO POT
1
77-01-350-C
TIN OF HIGH TEMPERATURE STOVE PAINT BLACK
1
77-01-950
BOLT DOWN BRACKETS
2
87-01-501/25
COMMON DOOR ASSEMBLY COMPRISING :-
1
87-01-450DA
DOOR CASTNG (BLACK)
1
309997-B
DOOR GLASS
1
188798-B
GASKETS FOR GLASS RETAINERS
4
142881-B
GLASS RETAINER SQUARES
4
259015-B
GASKET FOR BRASS KNOB
1
THERMOCORD SEAL FOR DOOR GLASS
1
181632-B
DOOR ROPE SEAL
1
77-01-918
SCREWS FOR GLASS RETAINERS
4
77-03-017
DOOR ROPE GLUE
1
77-01-965
COMMON FASTENERS AND SPACERS COMPRISING :-
OIL CONTROL VALVE SPACERS
2
87-01-501CS
OIL CONTROL VALVE SPACER FASTENERS
2
77-02-009-BB
REAR HEATSHIELD SPACERS
4
87-01-501SP1
SPLIT PINS FOR LOWER HEATSHIELD
2
77-02-044
REAR HEATSHIELD SPACER FASTENERS
4
77-02-009-A
HINGE PINS FOR DOOR
2
FLUE COLLAR FASTENERS
3
BOLT DOWN BRACKET FASTENERS
2
87-01-501-25

15
HEAT SHIELD FASTENERS
2
M8 DOOR HINGE
2
DOOR HANDLE
1
M8 NUT
2
77-02-072
COMMON OIL FLOW CONTROL ROD ASSEMBLY
COMPRISING :-
SPLIT PIN
1
77-02-044
OIL TRIP ROD (ALLUMINIUM)
1
87-01-501TCR
OILTRIP SWITCH BLACK KNOB
1
RS686-008
FLOW RATE STICKER
1
PRINT011
COMMON OIL VALVE COMPONENTS COMPRISING :-
OIL CONTROL VALVE SUPPORT BRACKET
87-01-501-16
OIL CONTROL VALVE INLET FITTING
1
FIT403
OIL CONTROL VALVE OUTLET FITTING
1
FIT404
FASTENERS FOR OIL CONTROL VALVE TO BRACKET
2
77-02-078
COMMON HEAT SHIELD COMPONENTS COMPRISING :-
LOWER HEAT SHIELD
87-01-501-9
RIGHT SIDE FOR LOWER HEAT SHIELD
87-01-501-10
LEFT SIDE FOR LOWER HEAT SHIELD
87-01-501-10A
OPTIONAL PARTS FOR ALL STOVES
COAL KIT COMPRISING :-
1
ONE PIECE SUPPORT FRAME
1
92-20-200-G
CROSS BRACE
1
92-20-200-F
COAL SUPPORT BARS
5
92-20-200-C
FRONT FRET
1
92-20-200-A
COALS MEDIUM
8
COALS-MMC2
COALS SMALL
4
COALS-MMC1
SEA GOING SHIPS VALVE 252AY 4/10 4CST
1
78-01-024
COMMON FIDDLE RAIL
1
92-40-070
© BUBBLEPRODUCTS 02-06-15
This publication may not be copied by any means, without written permission from the authors.
This product is subject to continuous development and improvement and it is consequently acknowledged that dueto this process there may be some omissions and errors.
This publication is intended only to assist the reader in the use of this product and therefore Harworth Heating Ltd shall not be liable for any loss or damage whatsoever
arising from the use of any information, error or omission found in this guide.
Only approved personnel, WHO HAVE BEEN SUITABLY TRAINED, must carry out maintenance on this appliance.