Morso UK | 1412 | 1412-1442-1452_Instructions_ for_Installation&use

1412-1442-1452_Instructions_ for_Installation&use
Instructions for Installation and Use
1412, 1442 & 1452
EN 13240
(74,6% efficiency)
Distributed by: Morsø UK
Valley Drive · Swift Valley · Rugby, Warks CV21 1TW · England
E-Mail: · Website:
Enjoy your new Morsø stove!
Morsø, the largest stove manufacturer in Denmark, has been making cast-iron stoves of the
highest quality since 1853. By carefully following
the instructions below, we are certain that you
will enjoy many years of comfortable warmth from
your new Morsø stove.
Installing your Morsø stovePage
Unpacking the stove21
Installing the stove21
Stove placement/clearance requirements 21
The chimney22
Pipe connections23
Connecting to a masonry chimney24
Connecting to a steel chimney24
Draught conditions24
Firing the stove
Lighting instructions and fuelling intervals27
Routine stove maintenance
External maintenance
Internal maintenance
Cleaning the stove
Alternative fuel types
Additional accessories
Morsø also offers a comprehensive line of floor plates and accessory products that can facilitate the safe and efficient operation and maintenance of your Morsø stove.
1.0 Installing your Morsø stove
1.1 Unpacking the stove
1412: After removing the outer packaging, flatten it and lay onto the floor close to the stove;
this can then act as protective work surface during the assembly process.
Next, remove the legs from inside the stove. Carefully lift the stove from the wooden pallet and
gently lay the stove onto its back and unscrew the
heat shield from the underside of the stove. Now
screw the legs and the Heat shield into position on
the underside of the base. Following the removal
of the wooden packaging the heat shield must be
fitted to the underside of the stove at the same time
as the legs utilising the same fixing bolts. Please
see drawing.
The stove should now be lifted and moved into
the upright position, avoiding excess load on the
back legs.
1442: Carefully lift the stove from the wooden pallet and set it carefully in place.
1452: The assembly of the soapstone stove 1450 is described separately and instructions are
enclosed with the soapstone packaging.
We recommend that two people perform the assembly and installation procedure. The Morsø
1412 weighs 70 kg, while the Morsø 1442 weighs 80 kg and the 1452 weighs 120 kg.
1.2 Installing the stove
The stove and chimney installations MUST comply to all current National and Local Building Regulations; your approved Morsø dealer or your local building control officer can advise regarding
this. Ultimately, it is you and your installer who is responsible that the installation complies.
1.3 Chimney sweep
It may also be wise to consult your local chimney sweep before installing the stove. After your
stove has been installed, it is advisable to have the chimney checked and swept at least once
a year. In any case, if your chimney has not been used for some time, it should be inspected
for cracking, bird nests, etc. before it is put back into use.
1.4 Stove placement/clearance requirements
Minimum Clearance requirements apply if the stove is placed near to combustible materials.
Permitted clearances to combustible materials are also indicated on the data plate on the rear
of the stove.
Minimum clearances to combustible surfaces:
Stove type
Behind the
stove (A)
To the sides of
the stove (B)
Above the
To soft
Morsø 1412/1452
uninsulated flue
200 mm
600 mm
500 mm
700 mm
Morsø 1412/1452
insulated flue
100 mm
600 mm
500 mm
700 mm
Morsø 1442
uninsulated flue
200 mm
300 mm
500 mm
700 mm
Morsø 1442
insulated flue
100 mm
300 mm
500 mm
700 mm
1412/1452 corner installation
1442 corner installation
In situations where the stove is to be fitted into a brick or non-combustible recess, we recommend that the stove is installed with at least 10 - 15 cm clearance to the wall, this will allow
heat to circulate around the stove; also the maintenance of the outside stove is easier. When
applied to masonry, a layer of wallpaper is normally classified as a non-combustible surface.
On the floor
National and Local Building Regulations must again be observed when considering the type,
thickness and area of the hearth to be used in the installation. Max Hearth temperature under
safety test was 45°C. One should of course always make certain that the underlying floor surface can bear the weight of the stove.
Distance to furniture and soft furnishings
We recommend that the stove be installed 700 mm from furniture. Serious consideration
should also be given to positioning of any furniture that could be adversely affected by heat.
The clearances to combustible materials in front of the stove should be a minimum of 700
mm. When lit, a wood-burning stove gets hot and therefore adequate protect must be provided, particularly in situations where there is a safety risk to children or the infirm. A suitable
safety guard around the stove should be considered.
The stoves handle also gets hot when the stove is lit, which is why a safety glove is included
with the stove.
1.5 The chimney
Only if National or Local Regulations permit are you permitted to connect a stove into a chimney that is shared by another appliance. YOU MUST be aware of any applicable Regulations
in this respect.
The wood-burning stove must never been connected to a chimney to which a gas-burning
stove or appliance is connected.
An efficient modern stove places heavy demands on the chimney, and you should have the
chimney regularly swept and inspected by your approved chimney sweep.
The cross-sectional area of the chimney (at its narrowest point) must comply with National
and Local Building Regulations. Generally, the area needed for a Morsø wood-burning stove
installation should measure at least 175 cm2 (150 mm diameter). An over-sized chimney is
generally hard to keep warm and results in poor draft. In cases where there is an oversized
masonry chimney, it is recommended that the chimney be lined using an appropriate chimney
lining system with the correct internal diameter. With respect to the chimney termination, all
chimneys should terminate in accordance with National and Local Building Regulations. Note
that National and Local Regulations also apply with regard to the placement of chimneys and
flues in connection with thatched roofs. See the section on Draft Conditions, 1.9.
The chimney or flue system must be equipped with access doors for inspection and cleaning.
The size of the cleaning door in the chimney must at least equal to that of the cross-sectional area of the chimney.
1.6 Fluepipe connections
Your stove is supplied ready for a top flue connection (3) the rear flue outlet is fitted with a
cover plate and is situated behind the rear heat shield/convection panel. Where a rear flue installation is required, simply knock out the steel plates in the rear heat shield/convection panel. This is best done by applying gentle hammer taps immediately onto the small ”bridges”
in the circular cut-outs. Once the knock-outs have been removed unbolt the cast iron cover plate and install it into the top of the stove. The flue collar can then be bolted over the rear
flue outlet using the bolts and clamps provided.
Placement of smoke tray
In some cases Morsø stoves come ready-equipped from the factory with a smoke hood (1),
as shown in the diagram. (NOTE: Not all stoves require a smoke hood). Where applicable, the
smoke hood must not be used if the stove is to be installed with a rear flue outlet (3).
Please note: During firing, the cleaning valve must always be installed correctly in the baffle
as the top cover may otherwise overheat and sustain permanent damage. Make sure that the baffle, smoke hood,
firebricks and the riddling grate are positioned correctly.
1.7 Connecting the stove to a masonry chimney
A wall sleeve should be bricked securely into the wall of the chimney at the appropriate
height and the stovepipe inserted centrally. The pipe must not extend into the actual chimney
opening, but rather must reach only to the inside of the chimney aperture. The gap between
the stovepipe and sleeve must be sealed using glass fibre packing rope.
Only use stovepipe components that comply to National and Local Building Regulations.
1.8 Connecting to a stainless steel insulated chimney system
If your installation involves taking the chimney straight up and through the ceiling, you must
comply with National, Local Building Regulations or flue manufacturers instructions concerning clearances to combustible materials such as walls, floor joists and ceilings. The joint between the stove flue collar and the stovepipe must also be sealed using the glass fibre rope
provided. It is important that the insulated flue system is properly supported both at ceiling
level and at roof level. THE STOVE MUST NOT BEAR THE WEIGHT OF THE CHIMNEY SYSTEM (See chimney manufacturer’s instructions). Excessive weight on the stove will inhibit expansion and could lead to damage of the stove top. Damage caused to the stove in this way
would not be covered by the manufacturers guarantee.
In the event that a chimney fire resulting from faulty operation or prolonged use of damp
wood fuel, close the air vents completely and contact your local fire department immediately.
Be aware of the following:
Cleaning procedure: Discuss this with chimney sweep or qualified installer
prior to or during the stove installation
Chimney draft: If the chimney draft is naturally poor it is better to install the
flue from the top of the stove so as to minimise any internal resistance of the
flue gases.
Avoid having any more than 2 bends in the flue system and limit the length of
the offset between bends.
Fresh air supply
A wood-burning stove requires air for combustion and therefore you may
need to install additional ventilation to the room, especially so in well insulated houses. If the air supply in inadequate the chimney draft may be too weak,
with the possible result that the stove will not burn properly; smoke spillage
may also occur during the refuelling process.
On a positive note, a properly installed wood-burner will give even the most
efficient houses a pleasant and natural ventilation.
1.9 Draft conditions
If smoke spillage occurs when the fire door is opened, it is probably due to poor chimney
draft. This type of stove requires at least 12 pa of chimney draft to achieve satisfactory combustion and smoke spillage prevention. However, in cases where the stove door is opened
too vigorously you could expect that slight smoke spillage may occur.
The smoke gas temperature at the rated output is 294˚ C relative to 20˚ C.
The smoke gas flow is 5.43 gr/sec.
If you have any doubts, you may want to have your installer measure the draft in the chimney.
Draft conditions
The chimney’s draft is the resulting effect within the flue caused by the difference in temperature within the flue and the cooler temperature outside. Other
factors that can influence the level of draft include the length of the flue, insulation of the chimney, adverse weather conditions or tall buildings or trees
nearby the flue terminal.
Poor draft occurs when:
• The atmospheric temperature difference is too low, e.g. a poorly insulated chimney. If the chimney is excessively cool, it may help to ‘prime’ the flue before the
fire is lit. Just place a screwed-up sheet of newspaper in the flue-ways of the stove and ignite.
• The outside temperature is too high, e.g. during the summer months.
• There is no air movement (wind) outside.
• The chimney is not tall enough, with the result that the terminal sits in the lee of
the roof surface or in the vicinity of tall trees or neighbouring buildings. These conditions are also associated with downdraft where the flue gases are pushed back
down the chimney.
• Flue draft is diluted by residual air entering the chimney, e.g. due to inadequate
flue-pipe joints or leaks at the cleaning door or flue collar.
• Unsealed, unused fireplaces are connected to the chimney.
• The flue is blocked, e.g. by soot, due to inadequate cleaning, loose debris or even
a birds nest.
• The house is too tightly sealed (see section on Fresh air supply).
A good draft is achieved when:
• The temperature difference between the chimney and outside is high. This also
applies during firing, when the need is greatest.
• The weather is clear and there is a good wind.
• The chimney is of the proper height, i.e. minimum 4 meters over the stove and the
termination adequately clear of the roof line.
2.0 Firing the stove/Using your stove
The heat output of your stove is regulated by means of the air inlets. The primary air supply, i.e. the air which passes through the shaking grate, is controlled by the bottom draft vent,
while the secondary air supply, i.e. the air supplied to the fire across the glass window, is controlled by the top draft vent. The stove’s rated heat output is 5,1 kW. The efficiency is 76%.
Your new Morsø stove is EN-tested and recommended to be fired with wood.
The stove is intended for intermittent use.
Wood is a material that contains a great deal of gas (approximately 75 %). The gases
are released when the wood is lit and heated up. For this reason, it is important that
the gases are ignited quickly after stoking.
If the wood just lies smouldering, especially after re-stoking, a lot of smoke is created, which, in the worst case, may cause an explosive ignition of the gasses, resulting in damage to the stove.
In order to ignite the gases that are released from the wood, and to keep clear, lasting flames during the combustion process, it is important to let in the required quantity of oxygen (air supply) at all times.
The setting of the air supply, the method of ignition and the lighting intervals depend
on the draught in the chimney, the wind and weather, the amount of heat required,
the fuel, etc. This means that it may take some time before you get to know the correct functioning of the stove under any given circumstances.
Although you can fire your Morsø stove with almost all kinds of wood, you should
not fire with wet wood, or unseasoned wood. Wood ought to be stored under a roof
for at least 1 year, and preferably 2 years, with free access to wind. Wood should be
chopped as soon as possible after felling if it is to dry quickly. The wood can be used
once the moisture content is less than 20%. During the EN test, all stoves are tested
with wood with a moisture content of (16 ± 4)%.
Never use driftwood, as it usually has a high salt content, which damages both the
stove and the chimney. Impregnated and painted wood and chipboard emit poisonous smoke and fumes, so they should not be used as fuel either.
Please note that liquid fuel may not be used in the stove.
Pieces of wood with a diameter greater than 10 cm should always be chopped.
The pieces of wood should be short enough to be able to lie flat over the layer of
embers, with air at both ends.
The maximum length of fuel in the stove is 25 cm.
The maximum quantity of fuel is 2 kg/hour (max. 2 pieces of wood each time you restoke).
The first few times you light the stove, the fire should be moderate, so that the heatresistant paint can harden before firing more vigorously. During the hardening phase,
the paint may develop obnoxious smoke and smell the first time it is lit, which is very
normal. Make sure that the room is well ventilated during this period.
2.1 Lighting and refuelling intervals
A lot of air is needed when first lighting the stove. When starting with a totally cold stove, it
may be helpful to leave the door ajar (2-3 cm) during the first few minutes; the secondary air
intake should be fully open. You should build and maintain the ash bed to a thickness of approximately 1 cm.
1.A layer of embers will form rapidly if the stove is lit with
2 - 4 fire lighters or 7 - 10 rolled up sheets of newspaper, underneath roughly 1 kg of dry kindling.
2.Fully open the top vent so that the secondary air supply can enter the firebox.
3.After the paper/fire lighters have caught fire, leave the
fire door ajar about 2-3 cm, so that the chimney draws
4.After 5-10 minutes the chimney draft should be established, at this point close the fire door. If all the necessary
conditions are met, a nice layer of embers will start to
accumulate after another 15 - 20 minutes.
5.Refuelling of your stove should be done while there
are still glowing embers in the bed. Spread the embers across the bottom, but concentrated mostly towards the front of the stove.
6.Place three pieces of fuel weighing roughly 0.6 kg and
measuring about 25 cm in length across the coals in
one layer, with spacing of roughly 1 cm between the
pieces of wood.
7.When the secondary air supply (top vent) is opened all
the way and the door is closed, the new fuel will ignite
in a few minutes.
8.Once the new fuel has taken, adjust the secondary air
amount to the desired setting; optimal combustion will
continue until glowing charcoals are produced.
Under normal chimney draft conditions, expect to refuel your stove every 60 - 70 minutes.
9.A new charge of wood can be added by repeating steps
5 & 6.
The stove door should normally be opened gently the first 2 - 3 centimetres, then you should
wait until the pressure has equalised before opening the door all the way. This technique will
prevent smoke from getting out, particularly when there is a poor draught.
The stove door should never be opened when the stove is being fired vigorously.
Once the wood has burned out, it becomes glowing charcoal. If a good layer of embers has
already formed on top of a sufficient layer of ash, the stove can keep warm for a very long
time, not least due to the favourable qualities of the cast iron.
We would strongly recommend that you do not leave your stove alit at night.
It harms the environment, and constitutes very poor use of the wood, as the
gases in the wood do not ignite at the low temperature, but settle as soot
(unburned gases) in the chimney and stove. Extreme conditions, such as poor
draught in the chimney, large quantities of wood or wet wood, may, in the
worst-case scenario, cause an explosive ignition.
When firing in the summer period, when there is minimal need for heat, the
combustion will be poor. The stove provides too much heat, so the combustion should be reduced. But always remember to make sure that there are
lasting flames until the wood becomes charcoal. If you want a weaker fire,
stoke up using less wood.
If you fire the stove using wet wood, a lot of the fuel’s thermal energy will be
spent forcing the water out of the wood, without releasing any heat to the
stove. This incomplete combustion results in a layer of soot being left in the
stove, pipe and chimney.
Comparison between wood-burning and oil-burning
Type of wood (moisture content 20%)
No. of cubic metres per 1000 litre of Oil
3.0 Routine stove maintenance
3.1 External maintenance
The surface of the stove is painted with heat-resistant Senotherm paint. If the stove is used
too vigorously, the painted surface may take-on a greyish tinge. It is easily maintained by simply vacuuming the surface with a soft brush attachment and applying two light layers of paint.
Morsø stoves are painted in Morsø dark grey. The touch-up paint is available either as aerosol
spray or as regular brush-on.
3.2 Internal maintenance
Ceramic glass
If the stove is used and installed onto a flue with the correct draft, very little or no deposits
should appear on the ceramic glass. It is usual for soot deposits to appear during long slumbering fires however, once the fire has been re-established to a burn brightly, these deposits
will burn off.
If the glass window becomes thoroughly covered in soot due to faulty operation or poor draft,
the soot can be easily removed using, e.g. Morsø Glass Cleaner, but please ensure that the
glass is cold before cleaning. Avoid fuelling the stove with wood that is so long that it presses
against the glass when the door is closed.
Reasons for sooted glass window:
• fuel is too wet (green)
• pieces of fuel/uncut wood are too thick
• operating temperature of the stove is too low
• too much air coming through bottom grate
Internal cast-iron parts and/or wear components
The shaking grate, baffle plate and other internal components that are in direct contact with
the fire are all constituted as ‘wear’ components or consumables, as, they are exposed to the
most wear. When used properly, these parts will last for many years, but overly vigorous use
will naturally shorten the lifespan. The aforementioned parts are all easily replaced.
If the baffle plate is damaged or warped and is not replaced in time, the top plate could become subject to excessively high temperatures, which may lead to damage here also.
Note that no unauthorised alterations to the stove design should be undertaken, and always
ensure that any replacement parts purchased must be Morsø original parts.
Reasons for premature wear of internal parts
• Stove being used/fired too vigorously • Too much air passing through the bottom grate
• Use of excessively dry wood (wood from old furniture)
• Excessive debris collection on baffle plate or inner fireback (see section on cleaning)
• Ash level too high in the ash pan (see section on ash
The rope gaskets in the door will need regular inspection in order to ensure and maintain full
control of your stove’s burning rate; over time the rope gaskets will harden and will become
less airtight, at this point you will need to remove and replace with new. Use only the genuine
Morsø gasket kit, which comes with detailed replacement instructions.
Normal wear components (inner parts) are not covered by Morsø’s extended guarantee
Maintenance products (Spare Parts, Glass Cleaner, Paint, Gasket Kit, etc) are all available
from your authorised Morsø dealer.
3.3 Cleaning the stove
During normal use and sweeping of your stove and chimney, a layer of ash, soot or debris
can form, particularly on the top of the baffle plate or inner fireback. Any deposits allowed
to build-up over time will have an insulating effect on these parts, thus restricting expansion;
this ultimately result in a shorter lifespan. The chrome-iron access door 1464 can easily be
removed from the stove and should be regularly checked for debris and cleaned. You must
ensure that your chimney sweep removes all soot and debris from the stove after the sweeping process.
Your chimney should be swept at least once a year; however a regular inspection of your
stovepipe and chimney will determine whether a more frequent approach should be adopted.
As noted above, there should be circa 1 cm insulating layer of ash on top of the grate when
burning wood only in order to achieve a high combustion temperature. Excess ash can be
removed by pulling out the shaker rod (outside of the stove) several times so that ash falls
cleanly into the ash pan below.
Be sure to empty the ash pan before it gets completely full; if the ash level reaches the underside of the grate, air flow through the grate will be restricted and will lead to over-heating and
premature wear of the grate parts.
When emptying the ash pan always dump the waste ash into a metal container (dustbin)
where it can fully cool before being taken away by your refuse collector. Ash from a woodburning stove does not benefit your garden as fertiliser.
Maintenance parts for 1412/1442/1452
Riddling grate (1440)
Riddling grate
Grate frame
Baffle plate complete
Access Door
Front grate
Product code.
Glass panel 1410
Glass kit (with screws, clips & gasket) 1410
Glass panel 1430
Glass kit (with screws, clips & gasket) 1430
Glass panel 1440
Glass window kit
(with screws, clips & gasket) 1440
Side firebrick
Coal inserts/fuel economisers
4.0 Alternative fuel types
Your new Morsø stove is EN-approved for burning wood.
However, the stove is capable of burning other solid fuels as manufactured smokeless coal
or good quality anthracite (stove nuts). If you fire your stove with any fuel other than wood, it
may help to use coal insert/fuel economisers, which simply fit into the left and right sides of
the firebox. Designed primarily to guide the solid fuel over the grate area they also slightly reduce the firebox capacity allowing you to have smaller fires.
This is an additional accessory and can be purchased from your authorised Morsø dealer.
Before burning solid fuel
Install the coal inserts into the left and right sides of the firebox. The stove is supplied with
one front grate; in some models a second front grate can be purchased through your authorised Morsø dealer if you wish to bank your fire higher so as to increase the burn time.
Lighting with solid fuel
All air vents must be fully open during the lighting process.
Start by placing 5-10 crumpled sheets of newspaper or 2 Morsø firelighters on the grate of
the stove; then carefully spread approximately 1 kg of well-dried kindling on the top. Light the
paper/firelighters. Once the kindling has fully ignited, gradually add a small quantity of solid
fuel, adding a little bit more once it has ignited. Continue in this manner until the entire grate
is covered with glowing coals. The level of fuel in the stove should never exceed the level of
the front grate(s). Once the bottom half of the fuel bed is glowing, you should partly close the
bottom vent (on the ash pit door). Once the stove has reached your desired temperature you
can maintain the output by opening further for more heat or closing for less heat. The top air
regulator must always be open just enough so that the flames burn almost clearly and the ceramic glass window stays clean.
Note: In cases where smokeless fuels containing petrocoke are burned, a pale
greyish layer may be deposited on the inner glass surface when the stove is lit. Fuels containing a high content petrocoke may cause a glistening in the surface of
the ceramic glass. Although visible, the structure of the glass will remain intact and
the stove safe. This reaction is not covered under the manufacturer’s guarantee.
In order to maintain the combustion process, the entire grate area must remain covered by
glowing coals. If the coal layer is too shallow you will have less heat and it would not be necessary to supply air via the top vent.
You must empty the ash pan whenever it becomes full. Different fuels have different ash content and therefore the regularity of the de-ashing process can vary.
Fuel storage
Your fuel supply should always be stored in a suitable, weather-tight coal bunker. These are
usually available through your approved coal merchant.
Morsø Jernstøberi A/S - 10.01.2008 - 72146800
E-Mail: · Website:
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