MORSO S11-70 (01) PDF Document

Distance requirements for the MORSO S11-70 apply only if the stove is placed near flammable materials. The minimum distances are as follows:

The distance to flammable material in front of the stove is 800 mm. It is also recommended that the MORSO S11-70 be installed at least 10-15 cm from masonry to allow heat to circulate and to facilitate cleaning.

Please note that the MORSO S11-70 wall-hung version may not be fitted to a wall made of combustible material.

The wall-mounting frame has 6 holes for mounting expansion bolts into the wall. The bolts must be adequately sized, and you must ensure that the wall is capable of supporting the stove’s weight of 70 kg (154 lbs). It is the responsibility of the installer or customer to ensure the wall can support the stove securely. Element block chimneys and semi-brick chimneys without a lining do not always have the necessary carrying capacity. If in doubt, contact a professional craftsman. The wall fitting can be used as a drilling template.

Note: Plastic rawlplugs must not be used due to the heat produced by the stove.

To install:

1. Mount the wall-mounting fixture on the wall. If the flue exit is wanted to the rear, build a wall bushing correctly into the wall.

2. Lift the wood stove into place so that it rests on the bottom part of the wall-mounting fixture.

3. Secure the stove to the fixture by means of the screws included.

Mounting the flue collar pointing upwards (Top Exit):

The MORSO S11-70 stove is factory-prepared for a top exit flue collar. To facilitate installation, first take the baffle plates out of the stove. Fasten the enclosed cast-iron flue collar to the top of the stove with the included screws. The ball stop, which is a 160 mm long rod, prevents the chimney sweep from damaging the baffle plates and should be fitted when installing the chimney.

Mounting the flue collar to the rear (Rear Exit):

1. Take the baffle plates out of the stove to facilitate the installation.

2. Remove the knockout cover from the rear heat shield with easy, firm taps of a hammer next to the small connecting “bridges”.

3. Remove the cover from the rear convector plate using the same method.

4. Unscrew the round cover from the back panel of the stove and reinstall it in the hole in the top panel.

5. Fasten the enclosed cast-iron flue collar to the back of the stove with the included screws. The ball stop is not used for a rear flue collar installation.

6. Finally, place the enclosed cover plate in the top panel to cover the flue exit hole.

Before lighting the stove, always make sure that the baffles are correctly assembled.

If smoke comes out of the MORSO S11-70 stove when the fire door is opened, it is likely due to a poor draught in the chimney. This stove requires at least 12 PA of chimney draught for satisfactory combustion.

The draught will be reduced when:

• The temperature difference between the chimney and the outside is too low, often due to a poorly insulated chimney.

• The chimney is cold. It may help to light and burn a rolled-up newspaper in the chimney’s cleaning door before lighting the stove.

• The outside temperature is too high, for example, during the summer.

• There is no wind.

• The chimney is not tall enough, sitting in the lee of the roof surface or tall trees.

• Air is entering the chimney in undesired places, such as through cracked joints or leaks in the cleaning door or flue pipe.

• Unsealed, unused fireplaces are connected to the same chimney.

• The flue pipe and chimney are clogged with soot from inadequate cleaning.

• The house is too tightly sealed, preventing sufficient air supply for combustion.

A good draught is achieved when:

• There is a big temperature difference between the chimney and the outside, i.e., when the need for heating is greatest.

• The weather is clear and there is a good wind.

• The chimney is of the proper height, i.e., a minimum of 4 metres above the stove, and clear of the spine of the roof.

Your MORSO S11-70 is EN-approved for burning wood. However, the stove can also burn other solid fuels such as approved manufactured smokeless coal or good quality anthracite (stove nuts).

BITUMINOUS HOUSE COAL SHOULD NEVER BE USED IN YOUR STOVE.

When using wood, you should not fire with wet or unseasoned wood. Wood should be stored under a roof for at least 1 year, preferably 2 years, with free access to wind. Chop wood as soon as possible after felling to help it dry quickly. The wood can be used once the moisture is less than 20%. Pieces of wood with a diameter exceeding 10 cm should always be chopped. The maximum length of fuel in the stove is 30 cm.

Never use driftwood as it has a high salt content which damages the stove and chimney. Impregnated and painted wood, and chipboard emit poisonous smoke and fumes and should not be used as fuel. Please note that liquid fuel may not be used in the stove.

Kindling requires a large flow of air. For the first few times you light the MORSO S11-70, the fire should be moderate to allow the heat-resistant paint to harden.

1. A layer of embers is formed quickly when lit with 2 kindling tablets or similar, along with approx. 1-1.5 kg of dry kindling. Place the kindling sachets evenly under the top layer of kindling.

2. Open the secondary air supply completely with the regulation handle beneath the door by turning it completely towards the right. Primary air is not used when firing with wood.

3. After the paper/solid alcohol tablets have caught fire, leave the fire door ajar so that the chimney draws well.

4. When you see that the chimney is hot enough to draw (after 5-10 minutes), close the door. After another 15-20 minutes, a thick layer of embers will have formed.

5. Re-stoking should be carried out while embers still remain. Distribute the embers in the bottom, ensuring most of them are at the front of the stove.

6. Place 2 pieces of wood, each 0.5 kg and approx. 20-22 cm long, over the embers in a single layer with a distance of approx. 1 cm between them.

7. Open the air supply to maximum and close the door. The fresh wood will ignite within a couple of minutes. It is important that the wood starts to burn quickly. To ensure this, open the combustion air to max or leave the door ajar.

8. Once the wood is burning with clear, lasting flames, reduce the amount of combustion air to the desired position for optimal combustion.

9. A new portion of wood can be added by repeating steps 5 and 6.

The maximum quantity of fuel is approx. 2 kg/hour (max. 2 pieces of wood each time you re-stoke).

Refuelling on to a low fire bed:

If there is insufficient burning material in the firebed to light a new fuel charge, excessive smoke emission can occur. Refuelling must be carried out onto a sufficient quantity of glowing embers and ash so that the new fuel charge will ignite in a reasonable period. If there are too few embers in the fire bed, add suitable kindling to prevent excessive smoke.

Fuel overloading:

The maximum amount of fuel specified in the manual should not be exceeded, as overloading can cause excess smoke.

Operation with door left open:

Operation with the door open can cause excess smoke. The appliance must not be operated with the appliance door left open except as directed in the instructions.

Overnight Burning:

It is strongly recommended that you do not leave your MORSO S11-70 lit at night. It harms the environment and constitutes very poor use of the wood as the gases do not ignite at the low temperature, but settle as soot in the chimney and stove.

External Maintenance:

The cast surface of the MORSO S11-70 is painted with heat-resistant Senotherm paint. It is best maintained by simply vacuuming it with a soft brush attachment or wiping it down with a dry, dust-free cloth. If the stove is used too vigorously, the painted surface may assume a greyish tinge, but can be freshened up with Morsø spray paint.

Internal Maintenance – Glass Window:

If used correctly, little or no soot will be deposited on the ceramic glass. If soot does form, it will usually burn away once normal combustion begins. If the glass becomes thoroughly covered in soot, it can be easily removed using Morsø Glass Cleaner. The glass must be cold when you clean it. Only use Morsø Glass Cleaner.

Internal Maintenance – Gaskets:

Over time, the gaskets in the door will wear and should be replaced as needed to prevent wild combustion. Use the original Morsø gasket kit.

Cleaning the Stove:

On the topside of the baffle plates, layers of ashes and soot will form. The baffle plates may be taken out of the stove for normal cleaning, which provides access to the flue chamber above them. Clean the baffle plates before reinserting them, ensuring they are properly put back in place. The chimney sweep must remove soot in the stove in addition to sweeping the chimney and cleaning the flue pipe.

Ash:

There should be a layer of approx. 1 cm of insulating ash in the bottom of the combustion chamber. If the layer is too thick, it can be brushed down into the ash pan. Empty the ash pan before it gets completely full so that the ash does not insulate around the grate, which could speed up burn-through. Store ash in a non-flammable container for several days as embers may be concealed in it.

The reasons for a sooty glass window on your MORSO S11-70 include:

• The fuel is too wet.

• The pieces of fuel are too big or are uncut wood.

• The combustion temperature is too low.

• There is insufficient air for the combustion.

The baffles and other components that come in direct contact with the fire and glowing fuel are wearing parts. Overly vigorous use will accelerate burn-through. Reasons for overly rapid wear of these internal parts include:

• Firing the stove too vigorously.

• Use of very dry wood (such as wood from old furniture).

• Too much soot on top of the baffles.

• Too much ash in the ash pan.

If the baffles are damaged and not replaced in time, the top plate will be exposed to high temperatures that may damage it as well. Please note that any parts that are replaced must be original Morsø parts.

To heat safely for the environment and yourself with your MORSO S11-70, follow these instructions:

• Use only dry wood: Use only dry (max. 20% moisture content) and untreated wood. The fuel must be split and 8 – 12 cm thick.

• Light: Light with dry kindling (use 1 – 2 kg). Leave the door ajar and stay close to the stove during the lighting phase.

• Good layer of embers: Be certain to have a good layer of embers before refilling. The wood should light within 2 minutes. If the logs do not ignite it may, in an extreme case, cause the flue gases to ignite which may pose a risk to material damage or personal injury.

• Refuelling: When refuelling, use 2 – 3 pieces of wood – no more than 2 – 2.5 kg.

• Ensure adequate air: I.e. clear and yellow flames.

• Never burn overnight.

The following spare parts are available for the MORSO S11-70:

The following table shows the number of cubic metres of different wood types (with 20% moisture content) required to equal the energy output of 1000 litres of oil: