Inis Oirr MK2 Multifuel Boiler stove
1
Inis Oirr MK2 Multifuel
14kw Boiler Stove
User and installation manual.
Inis Oirr MK2 Multifuel Boiler stove
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Congratulations on the purchase of your
new Inis Oirr MK2 Boiler stove. We here
at Inis Stoves truly love building high
quality stoves for our customers. The
stove we produced for you was not just
an appliance to us. We hope that you
will see it as a focal point in your
home. When fitted and operated
correctly, you should enjoy many years,
trouble free warmth from your Inis Oirr
MK2 boiler stove. Please read the user
manual fully before operating the stove.
As a general recommendation to all home
owners, Inis Stoves highly recommend the
use of fire alarms and carbon monoxide
alarms to EN 50291 standard, in your
home to protect you and your family from
harm. In the event that an alarm sounds,
evacuate everyone from the building
immediately and do not re-enter the
building until it is deemed safe to do
so.
Stove features.
As shown, the twin doors are opened by
turning the right side handle anti-
clockwise over 90 degrees to just beyond
vertical. When the right door is opened
it pulls the left door opened as well to
aid re-fuelling the stove and being able
to open the doors with one hand only.
Although the door handles have been
designed to be operated with bare hands,
when burning at full output over
extended periods, a kitchen glove is
recommend.
To riddle the grate, use the riddling
hand tool and gently oscillate the
riddler back and forth. Using excessive
force can lead to damaging the riddling
mechanism.
Normally it is advisable to have the
doors closed at all times except when
re-fuelling, de-ashing and when igniting
the stove. If excess fuming to the room
results at any time when the doors are
opened, they should be closed
immediately.
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The stove has been designed for ease of
use by the operation of only one air
control knob. This adjustment knob is
found on the left hand side of the stove
and to increase the air turn clockwise
and to close turn anti-clockwise. Your
Inis Oirr MK2 boiler stove has a manual
”Easy Start” damper fitted to the
underside of the stove and the damper is
operated as shown the diagram above by
pulling the damper out away from the
stove to open and pushing fully in
towards the stove to close.
To help with keeping the stove glass
clean, load the fuel toward the back of
the stove when lighting and fire the
stove at a high rate and avoid prolonged
periods at a very low setting.
The Inis Oirr MK2 boiler stove is fitted
with a multi-grate which facilitates the
combustion of various fuels. The multi-
grate can also be riddled with the doors
closed for cleanliness and safety. To
achieve this use the riddling/ash pan
removal tool as shown above.
First firing
When the stove is used for the first
number of times the process of curing the
paint will occur. To do this a small fire
using only kindling wood should be lit
for approximately 30 minutes, allow the
stove to cool slightly then repeat the
small fire using only kindling wood for
another 30 minutes. The final action to
cure the paint is to put on a strong fire
before the stove has cooled down, at full
output for at least one hour. The stove
paint will emit fumes with are non-toxic
but a window should be opened to avoid
fume build up during the curing process.
Before you operate the stove, consult
with the installer that all the relevant
work has been carried out correctly and
that they have ignited a small fire in
the stove and it is operating correctly.
Check that all relevant local, national
and European Standards have been adhered
to when installing the stove.
1. Inis Stoves is dedicated to the
principal of using renewable fuels
in all our stoves. We recommend
using wood fuel in the stove if
possible. Some recommended fuels
for this stove are below,
A. Hard or soft woods below 20%
moisture content,
Eco friendly formed wood fuels
for example “EcoBrix”.
B. Peat in solid form with low
moisture content.
C. Solid fuels use only HETAS
approved solid fuel, for example
„EcoBrite‟ nugget form smokeless
coal.
2. Never use liquid fuels in the stove
3. When in operation, the stove will
be hot and care should be taken to
avoid injury.
4. When using solid fuels like
smokeless coal, the ash pan should
be emptied at least every day.
5. Never attempt to modify the stove
in any way and always use genuine
Inis Stove spare parts.
6. Never place combustible or non-
combustible materials near, in or
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around the stove that will
interfere with the proper heat
convection and air supply to the
stove. The stove surround should be
fireproof. Never leave any fuels
too close to the stove.
7. For safe and efficient operation
of the stove, regular cleaning of
the stove and chimney is
essential. Dirty surfaces within
the stove will lead to poor heat
transfer to the water and the room
and will waste your fuel.
8. Care should always be taken when
emptying the ash pan of the stove.
Hot ashes should never be put in a
plastic dust bin, bag or
container. Ideally, empty the ash
pans when the ashes are cold.
Fuel
Inis Stoves recommend that wood be used
to fuel the stove. Other fuels however
can be burned in the stove.
Using wood to fuel the stove, the grate
should be in the closed position.
Excessive riddling should be avoided and
a good ash layer on the grate is
recommended. When using wood fuel,
please ensure that the wood has moisture
content below 20%. Well-seasoned and
kiln dried wood will achieve this.
Burning wood with a higher moisture
content will result in much reduced heat
output and a build-up of heavy tar
deposits in the stove and chimney.
To refuel the stove the firebox should
be well filled without fuel falling out
over the firebar against the doors. By
operating the stove in this way,
refuelling should only be needed every
90 minutes (when burning wood) at full
output and the stove will operate most
efficiently and cleanly this way. Once
the stove is fully hot the control knob
can be used to adjust the firing rate
down to the required output however to
heat the water properly the dial usually
needs to be kept above 6.
When using other recommended solid
fuels, the grate should be in the open
position. Fill the firebox up but do not
have fuel over flowing over the firebar.
Using smokeless nuggets like „Ecobrite‟
a refuelling period of over 4 hours is
achieved.
Household waste should never be burned
in the stove.
Never burn petroleum coke in this stove
as it will invalidate the guarantee.
Lighting the fire
The key to quick and easy lighting of
the stove is the ample use of kindling
wood. If too little kindling is used,
the fire will be slow to start and will
produce excessive smoke and deposits on
the glass.
The grate should be put in the open
position and both the thermostatic and
“Easy Start” dampers fully open.
Firelighters or well crumpled paper
should be surrounded with small pieces
of kindling toward the back of the
grate.
Light the fire and with the door lock
engaged but the doors slightly ajar let
the fire light up. After the kindling is
well alight add larger pieces of fuel to
the fire and after a few more minutes
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this fuel should be well alight. The
stove can be fully loaded now and a
bright high temperature fire should
result. Once the fire is well
established the “Easy Start” manual
damper should be closed. The stoves
output will normally not require
adjustment down of the thermostatic
damper until after approximately 1-2
hours depending on the system size as
the stove will take this time to fully
heat up.
Continuous burning
Your Inis Oirr MK2 boier stove is capable
of continuous burning making overnight
burning possible at a reduced output. To
achieve overnight burning, open the
thermostatic and “Easy Start” dampers
fully until the fire is burning rapidly.
Fill the firebox with a full charge of
fuel and let it ignite fully. When the
fire is burning brightly, the stove
dampers can then be closed down. With the
damper almost fully closed and the
correct draught in the chimney, an 8-12
hour burn time is possible. For more heat
output over a shorter time span the
damper can be opened up as necessary. To
avoid excessive blackening of the glass
the damper should be left slightly open.
To revive the fire after overnight
burning, riddle the grate, refuel the
firebox with a small amount of fuel, open
the thermostatic and “Easy Start” manual
dampers fully. Please be aware to avoid
excessive condensation in the boiler
during prolonged slow combustion and open
the damper more if it does occur. After a
prolonged period of slow combustion, the
stove should be fired at a high rate for
at least 30 minutes to help burn off
excessive soot deposits in the boiler
ways and the flue system. It is very
important that the installer has
correctly set the pump stats so as to
avoid cold water entering the stove for
any extended periods. A minimum return
temperature of 45 degrees Centigrade is
required to avoid condensation within the
boiler.
Ash clearance
The stove has two ash pans designed for
ease of handling. The ash pans should be
emptied before it is over filled to
protect the grate from overheating
especially when burning solid fuels as
the ash is an excellent insulator and
excess build-up of ash will cause grate
damage.
Stove cleaning and
maintenance
Regular cleaning is essential for safe
and efficient operation of the stove.
During the heating season it is
recommended to clean the stove weekly or
fortnightly. Inspect on a regular basis
the condition of the door seals and if
found to be worn replace immediately.
Only clean the stove when it is fully
cold. A pair of gloves should be used
when cleaning the stove and care should
be taken to avoid injury as a number of
the stove components are quite heavy.
The cast iron throat plates are removed
one at a time by pulling them slightly
forward along their length until the
retaining lugs are free of their slots.
The plates can then be lowered away and
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removed. Next the upper centre plate can
be removed by pushing upwards at the
front of the plate and then lifting the
plate vertical and dropping down into the
firebox. Please see Fig below.
With the throat plate assembly now
removed a flexible flue brush can be used
to clean out the 3 flue-way baffles on
either side of the heat exchanger (See
below).
When the throat plate assembly is re
installed, cleaning of the fire box/grate
assembly can be done.
Firstly, lift away the front firebar (See
exploded view of stove for detail). Next
the grate side plates are removed by
moving the front end of the plate up.
Once it is lifted up, it can be
withdrawn. After withdrawal of both side
plates, lift each riddler bar on the left
side first and remove. With the riddler
bars removed, the rear firebox plate can
be removed by lifting up straight and
lifting away.
Sometimes, after extended use a flathead
screw driver may be needed to help lift
the plate free. At this point all the
vents and areas at the back of the
firebox can be cleaned out (never clean
the stove if it is still hot!!!).
Inspect all internal parts of the stove
and replace if needed. Only Inis Stoves
genuine parts should be used in the stove
To clean the paint of the stove we
recommend the use of a slightly damp
cloth with a mild detergent. Avoid using
abrasive material on the paint of the
stove.
If the stove is to be unused for a
prolonged period of time, for instance
over the summer months, the stove should
be fully cleaned and a lubricant applied
to all moving parts. The damper may be
left slightly open to facilitate a little
air movement through the stove and avoid
moisture build up. Avoid excess opening
of the damper as this will result in
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excess heat loss through the stove up the
chimney. After a prolonged period being
unused, inspect the chimney before use to
ensure no blockage has occurred. Also
ensure that the air vent to the room of
the stove is clear. Inis Stoves highly
recommends annual servicing of the stove
as the service engineer will ensure
correct and thorough cleaning of the
entire stove.
Trouble shooting
NOTE: Excess fume emission
to the room must not be
tolerated.
Fire burns very rapidly and refuelling
periods are not being met.
1 Chimney draught is very high, chimney
damper may be required.
2 The fuel load is too small for the
damper setting.
3 Door seals are worn.
4 Adjust the damper for proper fire
control.
Fire will not burn properly
1 Chimney draught is too low
2 Damper is closed
3 Excessive horizontal flue used in rear
flue connection
4 Ash covering all air ways into firebox
5 Chimney and/or stove blocked with ash
or foreign body
6 Fuel is wet
7 No air vent present in room
8 Extractor fan in use
Some/all radiators not heating
1 Check that the fire is burning at
full output
2 Check that the pipe stat for the
heating is not set too high
3 Check if the system needs balancing
and that the radiators are turned
on. Check that a system link isn‟t
preventing flow to the required
radiators and that the radiators
don‟t require bleeding.
4 Ask the installer to check that the
stove is sitting level and that air
has not built up in the boiler.
5 Check that the pump is working.
6 Check that the flow rate of the
pump is not set too high or very
low due to blockage etc.
Stove emits fumes
1 Chimney blocked
2 Door seals require replacing
3 Excess down draught in chimney
4 Chimney draught below 15Pa.
Riddler grate is locked up/ won‟t
operate.
1 A foreign body like a stone or
steel nail has jammed the riddler
assembly. Dis-assemble the riddler
mechanism and check.
Glass blackens excessively
If the stove is fitted correctly and
the correct lighting and operation of
the stove is adhered to, blackening of
the glass should always burn off after a
period of full output. A poor draught
and/or the use of wet or improper fuel
will often lead to excessive glass
blackening.
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Chimney fire
If the stove and chimney are kept
clean, no fire should occur. If
however it does happen, close the
stove damper fully, close the stove
doors tightly. Only once the fire in
the stove and chimney has gone out
should the stove be opened and the
stove and chimney cleaned thoroughly.
If the fire is substantial and doesn‟t
extinguish, the fire brigade should be
called. After a chimney fire, expert
help should be sought to have the
chimney examined for any damage before
the stove is used again.
Should you have an issue?
In the event that you do have an issue
that you aren‟t sure about please
follow the following procedure.
Firstly contact the installer
and discuss the issue with them.
If further help is needed please
contact the retailer of the
stove. We take pride in choosing
retailers who have a proven
track record in customer
service.
If we still have an issue that
hasn‟t been resolved please
contact the Inis Stoves
technical department. Please
have this manual with you when
you call.
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Installation Manual
Specification
Output Kw
Water Kw
14
8.5
Flue Dia mm
153
Flue Gas
Temperature
266
Fuel
Wood, eco
fuels, peat
dried,
smokeless
coal
Min distance to
combustibles
Rear mm
Sides mm
150
250
CO @ 13%O2 %
0.14
Stove Mass
KG
165
Max Hearth Temp
52
Installation Instructions
The heat outputs as shown above were
obtained using well-seasoned hardwood
using a refuelling time of 1.5 hrs.
The wooden crating the stove was shipped
in can be cut up for fuel in the stove.
Health and Safety
precautions
Please ensure that the installation of
the stove complies with all the
requirements of the relevant Health and
safety at work acts applicable.
Some materials used in fire cement are
caustic and contact with the skin should
be avoided. In case of contact with the
skin wash with plenty of cold water.
If any structural work is required for
installation please take note of the
possible presence of asbestos. If the
presence of asbestos is found please
contact a registered asbestos removal
firm.
Combustion and
ventilation air
requirements
Proper air supply must be insured to the
room into which the stove is to be
installed. A permanent vent opening with
a minimum free area of 65 cm sq. must be
present and ensure that the vent cannot
be blocked for example by fallen leaves
and that any grills that fit the vent do
not lessen the cross section of the
vent. Under no circumstances should
there be an extractor fan in the same
room as the stove, to avoid the
possibility of combustion gases being
drawn into the room.
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When deciding on where to place a vent,
the installer must ensure that the
position will not cause undue air
currents through occupied areas of the
room. General points to note when
fitting a vent are,
Building Regulations specify
minimum distances to flues and
chimneys when placing a vent.
Where the vent is passing through
a cavity wall, the vent must have
a continuous duct across the
cavity. This duct must prevent the
ingress of moisture to the cavity
and the room.
If the vent is to be installed
into another internal room it must
not be a toilet, bathroom, bedroom
or separate living area such as a
chalet.
External air for airtight
and HRV fitted
buildings
Due to the increase in building
standards airtightness and the use of
Heat Recovery Ventilation, this stove
is available with external air
capability through the use of an
external air manifold fitted to the
Damper box of the stove. A flexible
aluminium pipe of 75mm internal
diameter can be used to connect off
this manifold onto the air supply
pipe. To bring air to this connection
duct it is advisable if possible to
run a 4” whether proof pipe from one
face of the house to the other end
which will help to balance high and
low pressure zones due to wind
conditions. The flexible aluminium
duct can then be connection to a Tee
piece off of the 4” duct. The 4” pipe
must be fitted with grilles to
prevent the entrance of rodents,
moisture and debris. Particular
attention must be paid to the HRV
unit if its suction fan into the
building fails and a negative
pressure within the building
develops. It is strongly advisable to
install a vent in the room that
allows negative pressure air movement
into the building in this event. It
is also most important to fit a
Carbon Monoxide Alarm approved to EN
50291 standard in the room where the
stove is fitted.
In addition to installation instructions
supplied, the requirements of BS.8303
and BS.6461 Parts 1&2; 1984 must be
fulfilled. Also all local authority
bylaws and domestic building regulations
should be taken into account, including
those referring to national and European
Standards regarding the installation of
solid fuelled burning appliances, flues
and chimneys must be observed.
Hearth and Fire Surround
If the installer has any doubts as to
the positioning of the stove and
necessary fire proofing, expert advice
should be sought before any work begins.
The stove must be placed onto a fire
proof hearth of at least 12mm in depth
and no combustible materials is used
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unless adjacent fireproofing fitted. The
stove positioning and hearth size are
governed by building regulations for
class 1 appliances. The hearth must
extend 300mm to the front of the stove,
and by 150mm to the sides of the stove.
The installation must allow good air
circulation around the stove to maximise
heat transfer to the room and to avoid
the fireplace overheating. To achieve
this, at least an air gap of 300mm above
the stove and 150mm either side should
suffice.
Please note that in an installation with
a wooded mantelpiece or wood beam, a
greater air gap of up to 650mm, or the
use of appropriate shielding should be
fitted. Building regulations should also
be checked in this regard.
Chimney
This stove is not suitable for a shared
flue arrangement.
Chimneys must satisfy standard EN
15287:2007 and Building Regulations
Approved document J.
A draft test should always be performed
prior to the fitting of the stove to
ensure that a proper draught in the
chimney is present (20PA Constant). A
chimney height of at least 4m from the
top of the stove must be used. The
chimney diameter must be at least 153mm.
The chimney must be in good condition,
be cleaned and free from cracks and
blockages.
The chimney must not have too great a
cross sectional area and if it is (Max
200mm Diameter), the chimney should be
lined with a suitable flue liner for
solid fuel. All chimneys and or flues
used must be sealed for the best
possible performance.
If a chimney is not present, then a
prefabricated block chimney or twin
walled flue can be installed.
The draught in the chimney must be at
least 20 Pa when warn and must not
suffer from down draughts and if there
is an excessive draw in the chimney a
draught stabiliser should be fitted. If
a draught stabiliser is installed please
ensure more air ventilation is provided
into the room. If any doubt exists
please contact a chimney expert.
In some cases although quite rare a
chimney will not produce a sufficient
and stable draught and the fitting of
the stove to this chimney will not
produce satisfactory clean and proper
output. It is very important to examine
alternatives before connecting the stove
in this case.
Connection to flues
Building Regulations Approved Part J
must be adhered to installing a
fabricated flue system for the stove.
When installing the stove to the chimney
care should be taken to assure that the
chimney can be swept and soot removed
properly and easily. If the stove is to
be connected using the top flue outlet
the chimney can be swept through the
stove, however for rear flue outlet
connections, it will most often require
the fitting of a soot door. A number of
flue and soot door arrangements are
possible and the advice of a qualified
chimney expert should be sought.
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Horizontal sections of flue should be
avoided or at least kept to a minimum.
Horizontal flue sections from the stove
or on any part of the flue pipe should
be 6” MAXIMUM in the horizontal. If the
flue needs to carry in any particular
direction greater than 6”, the flue
should rise at 45 degrees to the
horizontal so as to prevent the
degradation of the draught. 90 degree
bends must be avoided in the flue
system. The flue collar and the blanking
plate have sealing rope fitted to them
and must be checked that they are fully
tight before fitting. The installer must
ensure that the chimney and or flue
system is installed correctly as Inis
Stoves is not responsible for incorrect
installation.
Soot doors
Where the flue is installed from the
rear flue outlet, the use of a soot door
is necessary for proper sweeping of the
chimney and removal of the soot.
Adequate access to the soot door is
necessary. The soot door may be placed
in the existing block work or on a
suitable register plate between the flue
pipe and the chimney.
Central heating and
domestic hot water
systems
The stove can be used to heat both hot
domestic water and central heating. It
is best practice to have a radiator
fitted in the room the stove is to be
fitted to allow greater flexibility in
heating this room.
The stove is designed for open vent
central heating systems and a gravity
feed circuit usually to the domestic hot
water should be present. This gravity
feed circuit should rise directly up
from the stove and be vented at the top
to atmosphere. A minimum of 1” diameter
piping must be used on the gravity
circuit and this circuit must not exceed
8 meters horizontal distance from the
stove. An unvalved heat sink radiator
should be fitted to the gravity circuit
with a heat capacity of 1.0Kw to allow
for the removal of excess heat in the
case of a pump failure. All plumbing
circuits to and from this appliance MUST
be cross-connected.
It is important that the return water
temperature is not too low (below about
45 degrees Centigrade), to avoid excess
condensation in the boiler, gas ways and
chimney and avoid corrosion. This can be
achieved by the fitting of a low limit
thermostat on the return pipe on the
gravity circuit that will stop the pump
if the water temperature drops to low on
the gravity return circuit.
The plumbing circuit should always have
a drain cock at the lowest point to
facilitate the draining of the system if
required. An injector Tee must be fitted
to the return of the gravity and pumped
circuits if they are to be connected
together.
System controls
The stove is controlled by the single
control dial on the left hand side of
the stove once it is alight.
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The “Easy start” manual damper must be
closed once the stove is fully alight if
the heating controls are automated.
Please check the user manual for proper
operation. The heating system can be
controlled by system links, time
switches or other controls provided that
an unvalved heat sink radiator is
present and a low limit pipe stat is
fitted to the gravity return pipe to the
stove. There should always be a high
limit pipe stat fixed on the flow to the
central heating circuit set at 90
degrees centigrade to start the pump in
the event the low limit stat fails.
Initial firing pre-check
Before firing the stove for the first
time points to check for after
installation are,
1. Inspect the ash-pit and firebox of
the stove to ensure all the
various grate components and fire
bricks did not become dislodged
during transport and fitting.
2. Check that the chimney is sound
and clear.
3. The room has vents as described
above.
4. That all the sealing joints have
had time to set properly.
5. That all door seals etc. are
correct and present.
6. That the damper is operational and
working properly.
7. That all installation guidelines
have been adhered to.
8. That all local national and
European guidelines and laws have
been followed.
Initial firing
The first fire should be quite small to
ensure prompt extinguishing of the fire
in the event of a problem. The user
manual contains details on how to start
a fire in the stove.
Issues to check for once the stove is
alight are,
1. That no fumes are being emitted into
the room,
2. That a window is open in the room to
remove fumes from the paint on the stove
being emitted. Please see the paint
curing procedures in the user manual.
3. Check that all the radiators etc. are
heating and that there is no air present
in the system.
Commissioning and
handover.
Once the initial fire and the correct
operation of the stove have been
established, the user must be instructed
on the proper operation and maintenance
of the stove.
Answer any queries or issues the user
may have and seek advice from Inis
Stoves with regard to any issue you may
not be in a position to answer.
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Item # Description Qty Item# Description Qty
1 Riddler bar 6 25 Damper box cover plate 1
2 Door glass 2 26 “Easy start” damper push rod brace 1
3 Door glass clip 8 27 Thermostatic damper 1
4 Left Brick (part of set) 1 28 Thermostatic damper drive 1
5 Rear Brick (part of set) 1 29 “Easy Start” damper push rod bushing 1
6 Right Brick (part of set) 1 30` “Easy Start” damper slider 1
7 Left throat plate casting 1 31 Damper box 1
8 Right throat plate casting 1` 32 Firebar casting 1
9 Throat plate casting bracket 2 33 Riddler bar centre support plate 1
10 Hand tool 1 34 Riddler bar linkage 1
11 Walnut handle 2 35 Riddler mechanism outer section 1
12 Door lock washer 2 36 Riddler mechanism inner section 1
13 Door lock spacer 2 37 Firebox side plate left 1
14 Door lock 1 38 Firebox side plate right 1
15 Door handle body 2 39 Firebox rear section 1
16 Door lock wear plate clamp 1 40 Throat plate upper plate 1
17 Door lock wear plate 1 41 Flue collar 1
18 Door hinge block 4 42 Flue way blanking plate 1
19 Door hinge pin 4 43 Stove body 1
20 Door hinge block mount bolt 4 44 Ash pan right 1
21 Door casting left 1 45 Ash pan left 1
22 Door casting right 1 46 Stove back panel 1
23 Thermostatic damper dial 1 47 Door seal kit (not shown) 1
24 “Easy start” damper push rod/badge 1 48 Door glass seal kit (not shown) 1
Inis Stoves 2012
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