HASE MERIDA - User manual

Merida
Bedienungsanleitung / Mode d´emploi
Istruzioni operative / Instructions for use / Bedieningshandleiding

52
Dear Hase customer,
In deciding on a Hase stove, you have purchased a top quality
product. It goes without saying that we only use first-rate
materials and process them with superior craftsmanship
and the greatest care and precision. At our headquarters in
Trier, Germany, we put our love of detail into every stove we
develop and manufacture, thus ensuring that they meet the
highest standards in design, functionality, and eco-friendliness.
The well-balanced design, state-of-the-art production
processes, as well as our efficient and environmentally-friendly
combustion technology will let you keep enjoying your Hase
stove for years to come.
Please read carefully through these operating instructions.
They provide important instructions and offer useful tips for
spending cosy hours around the fire.
We hope you will enjoy your new HASE stove.
Yours sincerely,
Hase Kaminofenbau GmbH
Contents Page
1. General Information ........................................................52
1.1. Definition of Safety Notes.................................52
1.2 Proper Use............................................................53
1.3 Safety Instructions ..............................................53
2. Control Elements..............................................................54
3. Installation Conditions and
Relevant Building Regulations.......................................55
4. Safety Distances................................................................55
5. Installation..........................................................................55
6. Chimney.............................................................................56
7. Flue Pipe Connection.......................................................56
8. Butterfly Valve....................................................................56
9. The Right Fuel....................................................................56
10. Regulating the Combustion Air......................................57
10.1 Primary Air..........................................................57
10.2 Secondary Air ....................................................57
11. Fuel Load Sizes and Thermal Output ...........................57
12. Initial Operation................................................................58
13. Lighting the Fire................................................................58
14. Adding Fuel / Heating at Nominal Thermal Output .59
15. Heating with Brown Coal Briquettes............................59
16. Banking the Fire and Raising the Temperature..........59
17. Heating at Low Thermal Output....................................59
18. Emptying the Ash Drawer...............................................60
19. The Combustion Process................................................60
19.1 Drying Phase .....................................................60
19.2 Degasification Phase........................................61
19.3 Burn-off Phase...................................................61
19.4 Expansion Noises..............................................61
20. The Chemistry of Wood..................................................61
21. Contribution to Environmental Protection..................61
22. Evaluating the Combustion Quality..............................61
23. Wood Moisture Content and CalorificValue...............62
24. Storing and Drying Wood...............................................62
25. Cleaning and Maintenance.............................................62
25.1 Steel Cladding...................................................62
25.2 Flue Gas Paths..................................................62
25.3 Ceramic Glass Panels and Windows............63
25.4 Fire Box Lining..................................................63
25.5 Sealing Strips.....................................................63
26. Troubleshooting................................................................64
27. Technical Data...................................................................65
28. CE Declaration of Conformity........................................66
1. General Information
This section contains important information on using this
technical documentation. Utmost care was taken in preparing
this document. Nevertheless, suggestions for improvement
and comments regarding any errors are always welcome.
© Hase Kaminofenbau GmbH
1.1 Definition of Safety Notes
WARNING!
This symbol alerts you to a potentially
hazardous situation. Non-compliance with this
warning can cause severe injuries, or even
death.
CAUTION!
This symbol alerts you to a potentially ha-
zardous situation. Non-compliance can cause
damage to property or injuries to persons.
NOTE!
Provides additional tips about using the stove
as well as useful information.
ENVIRONMENT!
Sections marked with this symbol provide
information about safe and environmentally-
friendly operation as well as environmental
laws and regulations.

53
1.2 Proper Use
The stove may only be used for heating suitable living spaces
and may only be fuelled with wood (firewood) and brown
coal (lignite) briquettes.
WARNING!
Any other use is considered improper use
and can cause severe damage to the product
or even fatal injuries to persons.
The manufacturer‘s warranty does not apply to any damage or
injury caused by improper use of the stove.
1.3 Safety Instructions
WARNING!
Never use spirits, petrol, or other flammable
fluids to light the stove. During
operation, the external surfaces of the stove
become very hot, and thus the entire
stove poses a burn hazard. To ensure the safe
operation of this stove, we are enclosing a
glove with the delivery of your stove.
Children should never be left unattended near
the stove while it is in operation. There is a
burn hazard.
Do not wear loose-fitting and/or easily flam-
mable clothes when adding fuel to the fire.
Do not burn improper or unsuitable materials
such as chipboard, varnished, laminated, trea-
ted or plastic-coated wood, waste, refuse, etc.
These materials are harmful to the environ-
ment and can damage the entire combustion
system and stove.
Do not store flammable or combustible materi-
als or fluids (e.g., spray cans) in the immediate
vicinity of the stove.
If the air slider is closed while the fire is
burning or the embers are still glowing, the
flammable gases still present in the stove
can burn off explosively (deflagration), thus
causing severe damage to the stove.
Never put laundry or other objects on the
stove to dry them. Do not place heat-sensitive
materials on or near the stove.
Make sure that clothes drying racks and
other similar objects are placed at a sufficient
distance away from the stove.
Never put your life at risk in a chimney or
house fire. Your own safety always takes
precedence!
Modifying or making any changes to the stove
is not permitted. Only original
replacement parts from Hase Kaminofenbau
GmbH may be used.
CAUTION!
Be sure to connect the stove to a chimney that
meets the applicable regional and national
regulations and standards.
For safety reasons, make sure that all joints
and connections between the stove and chim-
ney are sealed tightly.
Improperly installed or leaking flue gas pipes
pose a particular risk due to smoke emission
and/or fire hazards. Please make sure to consult
a licensed specialised company to determine
the correct arrangement and installation of the
pipes.
We recommend using a lined wall sleeve and
installing a connecting piece with a butterfly
valve.
Please comply with the applicable country-
specific legal regulations.
Within a radius of 20 cm and around the
connection opening, you are legally required
to remove all flammable, combustible, or
heat-sensitive materials located on or inside
the wall, and replace them with non-flammable
materials. This regulation applies to Germa-
ny only. Outside of Germany, the pertinent
national fire protection regulations have to be
complied with.
NOTE!
In case of a chimney fire:
- Ring the emergency phone number to alert
the fire brigade!
- Notify your chimney sweep!
- Never extinguish the fire with water!
- Remove any flammable objects located in the
vicinity of the chimney!
- Wait for the fire brigade to arrive!

54
2. Control Elements
Fire box door handle
Ash compartment
with lid
Secondary air slider (II)
Primary air slider (I)
Grate slide

55
3. Installation Conditions and Relevant Building
Regulations
The stove must be installed in accordance with the instructions
and requirements stipulated by the respective national and
European standards and local regulations.
In Germany, the stove must be registered with the local master
chimney sweep for inspection prior to initial operation.
4. Safety Distances
Within a radius of 80 cm in front of and 25 cm around the
stove, flammable, combustible, or heat-sensitive materials
(e.g. furniture, wood or plastic panelling, curtains, etc.) are not
allowed to be located in the heat radiating area of the fire box
window (Fig. 1).
With regard to flammable materials beyond the heat radiating
area, a safety distance of 10 cm at the sides of the stove and
10 cm behind the stove has to be adhered to (Fig. 1).
WARNING!
Flammable flooring materials (e.g., wood,
laminate, carpeting,) must be protected with a
floorplate made of non-combustible material
(e.g., tiles, safety glass, slate, or sheet steel).
The size of the floorplate must be larger than
the base of the stove by at least 50 cm in front
and at least 29 cm at the sides of the stove
(Fig. 2).
5. Installation
Check to make sure that the load-bearing capacity of the
installation surface is sufficient. If necessary, using a floorplate
to distribute the load can increase the load bearing capacity.
Check whether the room in which the Merida will be installed
is adequately supplied with enough fresh air. If the windows
and doors are tightly sealed, the necessary supply of fresh
air may not be ensured, which can interfere with the draught
capability of the stove and chimney.
If additional combustion air inlet openings are required, they
are not permitted to be closed or blocked.
CAUTION!
Simultaneous operation of the stove with
ventilation systems and/or exhaust hoods can
cause negative pressure to build up in the
room where the stove is installed, which can
lead to problems such as flue gas escaping
from the stove.
NOTE!
To ensure that air is not drawn out of the room
where the stove is installed, we recommend
using a window contact switch to lock exhaust
hoods that guide the air to the outside.
Dimensions in cm
Dimensions in cm
10
25
80
80
10
10
29 29
50
fig. 1
fig. 2
R
a
d
i
a
t
i
n
g
A
r
e
a
R
a
d
i
a
t
i
n
g
A
r
e
a
floorplate

56
6. Chimney
The Merida has to be connected to a suitable chimney with
a minimum effective chimney height of 4.50 m. It can be
connected to a chimney to which other fireplaces are already
connected. The chimney cross section should correspond to
the flue pipe cross section. If the effective chimney height is
too low and/or the chimney cross section is too large or too
small, the draught capability of your stove can be impaired.
The Merida stove requires a 12 Pa output pressure (chimney
draft). At higher output pressures, the stove emissions
increase, which puts a high load on the stove and can lead to
damage.The Merida stove has a maximum permissible output
pressure of 35 Pa. To limit the output pressure, a butterfly
valve (Fig. 4) or output pressure limiter can be used.
7. Flue Pipe Connection
The Merida has to be connected to the chimney with a flue
pipe with an inside diameter of 15 cm. Please ensure that
all pipe pieces are tightly fit at the connection junctions. We
recommend using elbow pipes with cleaning hatches.
CAUTION!
The flue pipe must be well sealed at the
chimney entrance and cannot project into the
inner cavity of the chimney; otherwise the flue
venting will be impaired (Fig. 3).
8. Butterfly Valve
The butterfly valve (Fig. 4/1) is an optional control element. It
is fitted in the flue pipe and used to regulate the flue gas flow,
and can thus slow down the burning-off process. When the
handle’s position is diagonal to the flue pipe, the flue gas flow
rate is turned to minimum. We strongly recommend installing
a butterfly valve to reduce the output pressure. Please comply
with the country-specific legal regulations.
1
fig. 4
NOTE!
Make sure butterfly valve (Fig. 4) is open
before opening the fire box door during the
burning phase.
9. The Right Fuel
Only fuels which generate low quantities of smoke may be
burned in stoves. Only fuel in the form of natural, untreated
wood logs or bricks, including the adherent bark, can be used
for the Merida.
For the most attractive stove fire, use beech wood logs. If
other types of wood are used, such as oak, birch, pine or
larch, we recommend adding beech wood for picturesque
dancing flames. Brushwood and small pieces of wood are
good kindling materials.
Highly resinous coniferous wood (e.g. spruce, pine, fir) tends
to emit flying sparks and leaves behind a fine layer of flue ash
that can swirl up when the fire box door is opened.
The firewood should be stored for at least two years to achie-
ve the required maximum residual moisture content of 20%.
CAUTION!
If the wood used as fuel is too moist, water
vapour can condense and damage the stove. In
addition, it will reduce the thermal output.
CAUTION!
Burning, e.g.:
- damp or moist wood(residual moisture
content over 20%),
- varnished, laminated, treated, or plastic-
coated wood,
- wood treated with wood preservatives,
- household waste,
- paper briquettes (contains pollutants such
as cadmium, lead, zinc), or

fig. 3

57
- any flammable fluids (including methanol
and ethanol) as well as any fuel pastes
or gels
is not permitted.
ENVIRONMENT!
Combustion of the materials listed above not
only gives off unpleasant odours, but also
generates emissions that damage the environ-
ment and are harmful to health.
Combustion of non-permitted fuels constitutes
a violation of the German Federal Immission
Control Act.
Improper fuels and their combustion residues
can be detrimental to the functioning and ser-
vice life of the stove and chimney – use of such
fuels voids both the warranty and guarantee.
10. Regulating the Combustion Air
To effectively guide the required volume of air to the right
places, a customized air flow system has been developed for
your Hase stove.
When lighting thefire and adding fuel, you can use theprimary
air and secondary slider to regulate the combustion air.
10.1 Primary Air
The primary air is guided through the grate and into the fire
box from below, which allows the stove to reach the required
fire box temperature more quickly during the warming up
phase.
10.2 Secondary Air
The secondary air is guided into the fire box from the top, via
air ducts in the stove. It supplies the fire box with the volume
of preheated oxygen necessary to completely burn off the
wood gas and reduces the build up of soot on the fire box
windows.
For regulating the secondary air, the following general rule
applies: a small fire requires little secondary air; a large fire
requires ample secondary air.
WARNING!
If the secondary air slider (Fig. 5/II) is closed
too tightly, there is a risk that the flue gases
will not burn completely (smouldering fire),
that soot will build up on the fire box window,
or that the amassed wood gases will burn
explosively (overfiring/deflagration).
Burning wood when the primary air slider
(Fig. 5/I) is opened too wide poses the risk of
overheating the stove (forge fire effect).
CAUTION!
During operation, the secondary air slider
(Fig. 5/II) should never be completely closed.
In contrast, however, the fire box door and ash
compartment must always be tightly shut.
11. Fuel Load Sizes and Thermal Output
The thermal output depends on the amount of fuel you put
in the stove. When adding more fuel, please do not exceed
the maximum fuel load size of 1,7 kg. Exceeding the maximum
fuel load size leads to a danger of overheating, which can
result in damage to the stove and the risk of a stove fire.
NOTE!
To attain a thermal output of approx. 4 kW,
burn wood logs that weigh 0.8 kg and are no
longer than 25 cm in length for about 40 min.
(with brown coal briquettes 2 briquettes
with a total of approx. 1 kg at approx. 60 min)
NOTE!
To attain a thermal output of approx. 2 kW,
burn wood logs that weigh 0.4 kg and are no
longer than 25 cm in length for about 35 min.
(with brown coal briquettes 1 briquette with
a total of approx. 0,5 kg at approx. 55 min).
fig. 5
Primary air slider (I) Secondary air slider (II)
grate slide

58
The Merida is intended for intermittent operation, please only
apply one fuel layer at a time.
In Austria and Switzerland the Merida is only authorised to
burn firewood.
12 . Initial Operation
NOTE!
During shipment, condensation moisture can
accumulate in the stove’s interior, which may
possibly lead to the appearance of
condensation or water on the stove or flue
pipes. Please dry off these damp areas imme
diately.
The surface of your stove was treated in a sandblasting
machine before applying the colour coating. Despite careful
and thorough inspection, there may still be some residual
material in the stove body, which can fall out when your stove
is being installed.
NOTE!
To prevent any damage, please immediately
vacuum up these small steel pellets with a
vacuum cleaner.
The first time a stove is operated, the heat development
causes the emission of volatile components from the coating,
sealing strips and lubricants, and smoke and odours can
occur.
At a higher combustion temperature, this one-time process
can take between 4 to 5 hours.
To achieve this higher combustion temperature, please
increase the fuel quantity recommended
in Section 14, „Adding Fuel/ Heating with NominalThermal
Output“, by approximately 25%.
CAUTION!
To prevent adverse effects on health, nobody
should stay in the room(s) during this process
unless absolutely necessary. Make sure the
room is well-ventilated and open the windows
and outside doors. If needed, use a fan for
faster air circulation.
If the maximum temperature is not reached during the first
heating operation, you may notice an odour for a short period
of time the next time the stove is used as well.
13. Lighting the Fire
The firing up phase should be as short as possible, since
higher emissions can occur during this phase.
The slider settings described in Table 1 (see figure on the
right) are recommendations that were determined under
conformance testing conditions, in compliance with the
relevant standard. Depending on the weather conditions and
the draught capability of your chimney, accordingly adjust the
slider positions for your Merida to the local conditions.
NOTE!
The Merida may only be operated when the
fire box door is closed; the fire box door may
only be opened to add fuel.
WARNING!
Never use spirits, petrol, or other flammable
fluids to light the stove.
Lighting the Fire
Procedure Position of Control
Elements
Completely open primary
and secondary air.
Pull primary and secondary air
slider all the way out. (fig. 6)
Open fire grate. Pull out fire grate slider.
Pile up any remaining ash
and unburned Charcoal
into the centre of the
combustion chamber.
Place 2-3 small logs into
the middle of the fire box;
stack approx. 0.5 kg of dry
wood chips on top.
Light the ignition material
at several places.
Open fire box door.
Close fire box door.
Tab. 1
(I) (II)
Fig. 6

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14. Adding Fuel / Heating at Nominal Thermal Output
More fuel should be added to the fire when the flames from
the previous burning off phase have just gone out.
16. Banking the Fire and Raising the Temperature
Keep the stove set as described above until the brown coal
briquettes are thoroughly burnt. Then close the primary air (I)
and the fire grate.Slide the secondary air slider (II) to position
2/3.
NOTE!
While the stove is in operation, the secondary
air slider should never be completely closed.
To raise the temperature of the fire, stir up the rest of the
glowing embers with the fire grate slider. Open the primary air
(I) and add new logs to the fire.
17. Heating at Low Thermal Output
(during Transitional Seasons)
You can vary the thermal output of your Merida by adjusting
the quantity of fuel used.
NOTE!
Do not attempt to slow down the combustion
by reducing the air supply. When heating with
wood, this can result in an incomplete burning
process and pose the risk of an explosive-like
combustion of the accumulated wood gases
(deflagration)
15. Heating with Brown Coal Briquettes
Wood should be used for the warming-up phase and when
adding fuel for the first time, see “Warming-up Phase”. As
soon as a basic glowing firebed is reached, place 2-3 brown
coal briquettes on the grate in the middle of the firebox, kee-
ping a finger’s width between the briquettes, and use the
following procedure and settings:
Adding Fuel / Heating at Nominal Output
Procedure Position of
Control Elements
Adjust primary and
secondary air.
Close primary air slider
(I), set secondary air slider
(II) to position 3. (fig. 7)
Close fire grate. Push in fire grate slider.
Add two logs weighing approx.
0,8 kg in total. Place logs with
one end to the front of fire box.
Only add a single layer of fuel.
Open fire box door.
Close fire box door.
Tab. 2
Heating with Brown Coal Briquettes
Procedure Position of
Control Elements
Open primary air completely.
Adjust secondary air.
Pull primary air slider (I)
all the way out (fig. 8)
Set secondary air slider (II)
to position 2. (fig. 8)
Open fire grate. Pull out fire grate slider.
Tab. 3
Fig. 7
(I) (II)
Fig. 8
(I) (II)

60
Heating with Wood at Low Thermal Output
Procedure Position of
Control Elements
Close primary air
Adjust secondary air.
Push in primary air slider (I)
as far as it will go. (fig. 9)
Set secondary air slider (II) bet-
ween position 2 and 3. (fig. 9)
Close fire grate. Push in fire grate slider.
Add one log (weighting
approx. 0.4 kg total) into
the middle of the fire box.
Tab. 4
18. Emptying the Ash Drawer
As a safety precaution, please make sure to wait until the
ashes are cold before you dispose of them. While the ash
collects during the fire, the lid is located under the ash drawer.
Remove both the ash drawer and the lid located underneath
it. Slide the lid onto the ash drawer so that it is closed; this
prevents ashes from flying around, which in turn means your
home stays clean. To place the ash drawer back into the stove,
proceed in the reverse order.
CAUTION!
Piled up ashes can impair or even block the
supply of primary air supply to the stove.
Please ensure that the air supply path for the
primary air between the ash drawer and the
bottom of the ash compartment remains clear.
19. The Combustion Process
EA piece of wood burns in three phases. In a wood fire,
however, these processes occur both consecutively and
simultaneously.
19.1 Drying Phase
The moisture still remaining in the air-dried wood (approx.
15 - 20%) is evaporated. This takes place at temperatures of
approx. 100°C. For the evaporation to occur, the wood must
be supplied with heat during the warming up phase; this is
achieved by using small wood logs.
Heating with Briquettes at Low Thermal Output
Procedure Position of
Control Elements
Adjust primary air.
Adjust secondary air.
Set primary air slider (I)
to position 3. (fig. 10)
Set secondary air slider
(II) between position
1 and 2. (fig. 10)
Place 1 briquettes
on the fire grate.
Open fire grate. Pull out fire grate slider.
Tab. 5
Fig. 9
Fig. 10
(I) (II)
(I) (II)

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19.2 Degasification Phase
At temperatures between 100°C and 150°C, the contents of
the wood start - slowly at first – to disintegrate and gasify and
the wood begins its thermal decomposition. At tempera-
tures above 150°C, the gas development accelerates. The
proportion of volatile components makes up around 80%
of the wood substance. The actual combustion begins at a
temperature of about 225°C (ignition temperature) with the
ignition of the resultant gases and the release of heat. There
must be an adequate supply of oxygen available for this
purpose. The peak of the combustion process is reached at
approx. 300°C. The reaction process is now so rapid that the
largest amount of heat is released at this point; flames can
reach temperatures of up to 1100°C.
19.3 Burn-off Phase
Glowing charcoal embers remain after the volatile compon-
ents have been burned off. These burn slowly, almost without
flames, at a temperature of approx. 800°C.
Crucial to a clean and efficient combustion process is a
complete as possible chemical
reaction of the wood gases with the oxygen in the combustion
air. In your Hase stove, the combustion air is pre-heated and
guided into the fire box via wide air inlet openings, so that at
high temperatures, there is a good, thorough mixing of the
gases with the air. An important variable in any combustion
phase is the amount of combustion air. Too little air leads
to an oxygen deficiency and incomplete combustion, while
too much air reduces the fire box temperature and thus the
efficiency. Incomplete combustion can generate air pollutants
such as dust, carbon monoxide, and hydrocarbons.
Degasification
Drying
Burn-off
fig. 11
19.4 Expansion Noises
Steel expands upon heating and contracts as it cools.These
movements occur during the warming up and cooling down
phases, as well as when adding fuel. They can cause your
stove to emit audible expansion sounds. However, the design
and construction of your stove takes this into account and
prevents this physical process from damaging the stove.
20. The Chemistry of Wood
Wood predominantly consists of the elements carbon,
hydrogen, and oxygen. It contains virtually no environmental-
ly hazardous substances such as sulphur, chloride and heavy
metals. As a result, complete wood combustion produces
mainly carbon dioxide and water vapour as the primary
gaseous products as well as a small quantity of wood ash as
the solid combustion residue. On the other hand, incomplete
combustion can generate a number of pollutant substances,
such as carbon monoxide, acetic acid, phenols, methanol,
formaldehyde, soot, and tar.
21. Contribution to Environmental Protection
Whether your Merida burns in an environmentally-friendly
or environmentally hazardous manner depends to a large
extent on how you operate it and the type of fuel you use (see
Section 9, „The Right Fuel“).
Therefore, use only dry wood; hardwoods such as birch and
beech are most suitable.
Only use small pieces of wood to light the fire. They burn
faster than large logs and as a result, the temperature required
for complete combustion is reached more quickly.
For continuous heating, adding smaller quantities of wood
more frequently is more efficient and more ecological.
22. Evaluating the Combustion Quality
The following characteristics can help you easily evaluate the
quality of the combustion:
– Colour and composition of the ash
If the combustion process is clean and efficient, the
result is a fine white ash. Dark colouration indicates that
the ash contains charcoal residue; in this case, the burn-
off phase was incomplete.
– The colour of the flue gases emitted at the chimney pot
Here, the following applies: the more invisible the flue
gases exiting the chimney, the better the combustion
quality.
During the transitional seasons (spring/autumn), outdoor
temperatures above 16°C can impair the chimney draught. If
a draught cannot be created at these temperatures by rapidly
burning paper or thin wood shavings (quick fire), you should
refrain from lighting the stove.

62
23. Wood Moisture Content and Calorific Value
Rule of thumb: the more damp the wood, the lower the
calorific value.
The calorific value of the wood depends largely on the wood
moisture content. The more
moisture the wood contains, the more energy expended to
evaporate it during the combustion
phase; this energy is then lost. The more damp the wood, the
lower its calorific value.
An example: freshly cut wood has a moisture content of
approx. 50% and a calorific value of around 2.3 kWh/kg;
in contrast, wood which has been efficiently air-dried has
a moisture content of approx. 15% and a calorific value of
around 4.3 kWh/kg.
Accordingly, if you burn very moist wood, you will have about
half the thermal output with the same quantity of wood.
Furthermore, burning moist wood results in substantial soot
build-up on the fire box window. Moreover, when moist wood
is burned, the resultant water vapour can condense in the flue
pipe or chimney, which can lead to a build up of shiny soot
on the chimney or chimney creosote. Chimney creosote can
cause unpleasant odours and damage brick chimneys, while
shiny soot poses a fire hazard (chimney fire). In addition,
if the wood has a high moisture content, the combustion
temperature decreases, which prevents complete combu-
stion of all the wood components and causes considerable
environmental pollution.
You can use a wood moisture meter to determine the residual
moisture content of your firewood.
24. Storing and Drying Wood
Wood needs time to dry. If stored properly, it will air-dry in
approx. 2to 3 years.
Saw, split, and store the wood ready for use; this ensures
rapid drying because smaller pieces of wood dry better than
larger, uncut logs.
Stack and store your wood logs in a ventilated location that is
as sunny as possible, ideally facing south, and ensure that the
wood is protected from rain.
Leave a hand’s width between the individual piles of wood so
that air can flow between them and carry away any escaping
moisture..
Do not cover your wood stacks with plastic sheeting or tarpau-
lins; otherwise the moisture cannot escape.
Do not stack fresh wood in a cellar or basement, since it will
rot rather than dry due to the lack of airflow.
Only store already dried wood in dry and well-ventilated cellar
or basement rooms.
25. Cleaning and Maintenance
25.1 Steel Cladding
Hase stoves are coated with a heat-resistant open pore lacquer
that provides only limited corrosion protection; accordingly, a
rust film may develop in some cases.
Do not use any detergents containing acid (e.g. citrus or
vinegar cleaners) to clean the steel parts. The steel parts can
be adequately cleaned by wiping them down with a slightly
moistened cloth.
Avoid using excessive water to clean the floor/floorplate. Any
water that spills from kettles, boilers, or dishes should be
immediately mopped up.
Do not install the Merida in „damp rooms“, e.g. conservatories
or wintergardens. Do not temporarily store the stove in an
unheated building shell orgarage.
NOTE!
Treat areas covered in a rust film with the
original Hase Stove Lacquer Spray. Be sure
and follow the instructions on the spray can.
Your authorised Hase dealer carries the stove
lacquer spray and can give you tips on using it.
25.2 Flue Gas Paths
The stove and flue pipes should be inspected for sediment
and deposits at the end of each year’s heating period (even
more often if required, e.g. after the chimney has been
cleaned), and then cleaned if necessary.
To clean the flue-gas channels remove the upper heat-
resisting slab and the deflectors, if present (see Instructions for
Installation and Maintenance). Any soot and dust deposits can
be brushed off and vacuumed. After cleaning, re-assemble the
parts removed.
NOTE!
Use a flexible pipe brush to clean the flue pipe
at the cleaning port located on the flue pipe.

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25.3 Ceramic Glass Panels and Windows
When the stove is properly operated, the secondary air forms
an air curtain at the pane, which minimises the formation of
soot on the glass.
If ash particles get on the ceramicglass panels, we recom-
mend a tried and true environmentally-friendly cleaning
method as an alternative to conventional glass cleaners:
Ball some up paper towels or newspaper, moisten the ball, dip
it into the cold wood ash, rub the panel with it and then wipe
the glass with a clean, dry ball of paper.
25.4 Fire Box Lining
The heat-resisting slabs in the fire box of your Merida stove are
made of Vermiculite. Vermiculite is a fire-resistant mineralogi-
cal granulate material with excellent insulating properties. The
density of the slabs arises from the optimal balance between
mechanical stability and insulation properties.The relatively
soft surface is subject to natural wear and tear, depending on
use. The heat-resisting slabs have to be replaced if parts break
off and the back wall of the fire box, located behind the slabs,
becomes visible.Tears or cracks in the heat-resisting slabs do
not impair the functioning of your stove.
NOTE!
To prevent damaging the heat-resisting slabs,
place logs carefully in the fire box and do not
let them fall against the walls of the fire box.
25.5 Sealing Strips
The sealing strips are made of highly heat-resistant, asbestos-
free fibreglass. The sealing strips are wearing parts and thus
have to be replaced in line with the frequency of use.
We advise having your stove regularly inspected by a
specialist.

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Possible Problem Possible Cause
The wood does not light orlights only slowly. - The wood is too thick. / The wood is too damp.
- The air supply is inadequate.
The wood burns without a bright, yellow flame, smoulders, or even goes out. - The wood is too damp.
- The air supply is inadequate. / The butterfly valve is closed too tightly.
- The outside temperature is too high.
Too much soot is produced; the heat-resisting slabs do not
stay clean and free of soot during operation.
- The outside temperature is too high.
- The air supply is inadequate.
- The quantity of wood is too small and thus the combustion chamber remains too cold.
The fire box window becomes sooty. - The wood is too damp.
- The secondary air supply is inadequate.
- The secondary air supply is inadequate.
- The chimney draught is too weak.
The wood burns too quickly. - The chimney draught is too strong.
- The wood logs are too small.
- The control elements are positioned or set incorrectly.
Smoke escapes into the room while the stove is in operation. - The air supply is inadequate. / The butterfly valve is closed too tightly.
- The chimney cross section is too narrow.
- The flue gas ducts in the stove pipe or chimney are extremely sooty.
- Wind is blowing down on the chimney.
- Fans (bathroom, kitchen) are creating negative pressure in the
living room and drawing smoke from the stove.
The chimney becomes wet and coated with creosote, condensate leaks out of the stove pipe. - The wood is too damp.
- The flue gases are too cold. /The chimney is too cold.
- The chimney cross section is too wide.
Although the fire burns well, the stove does not get warm. - The chimney draught is too strong.
- The air sliders are not in the correct position.
Smoke escapes when the fire box door is opened. - The chimney draught is too weak. / The chimney cross section is too wide or too narrow.
- The fire is still burning too strongly.
- The fire box door was opened too quickly.
- Fans (bathroom, kitchen) are creating negative pressure in the living room
and drawing smoke from the stove.
- The butterfly valve is closed.
26. Troubleshooting

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27. Technical Data
The Merida, certified in compliance with DIN-EN 13240 : 2001 + A2 2004 and Art. 15
a B-VG (Austria), can only be operated when the fire box is closed; more than one device
can be connected to the chimney.
VKF-No.: 21010; Inspection Report No. (A): FSPS-Wa 1962-A
Combustion Values (Inspection with split beech logs):
The following data applies to thechimney characteristics in accordancewith EN 13384-1/ 2:
Depending on the insulation of the building, the nominal thermal output of 4 kW indicated
on 10 - 50 m² (subject to change)
Dimensions: Height Width Depth
Stove 135 cm 48 cm 41 cm
Fire box 34 cm 22 cm 27 cm
Weight: 144 kg
Fire Box Opening: 88 cm²
Flue pipe diameter: 15 cm
Pipe diameter of Hase ventilation system* 10 cm
* For separate air supply in low-energy houses and insufficient combustion air supply in the
room where the stove is installed
Front view Side view
Top view
Dimensions in cm
Wood Briquettes
Nominal Thermal Output 4 4 kW
Waste Gas Mass Flow Rate 4 4 g/s
Waste Gas Outlet Temp. 280 280 ˚C
Min. Supply Pressure at Nominal Thermal Output 12 12 Pa
CO content at 13% O2 0,085 0,09 Vol%
Efficiency 80 79 %
Particulate 23 50 mg/Nm³
Stove height: 135
Height for top installation:132
48
41
Height for inst. of hase air system: 12,5
18,5
Height for rear installation: 122

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28. CE Declaration of Conformity
The original Declaration of Conformity and associated documents are available from the manufacturer upon request.
The Manufacturer: Hase Kaminofenbau GmbH
Niederkircherstr. 14
54294 Trier / Germany
Hereby declares that the room heating appliance for use
with solid fuels, bearing the trade name:
Merida
complies with the stipulations and provisions of the:
CE Construction Products Directive 89/106/EEC and the M129 Mandate
and is in compliance with the following harmonised standard:
EN 13240:2001+EN 13240:2001/ A2: 2004
The notified testing institute listed below has performed the inspection and
testing of the room heating appliance for use with solid fuels in regards
to conformity with the requirements specified by the standard:
RWE Power AG
Feuerstättenprüfstelle
D-50226 Frechen
Kennziffer: NRW 16
Trier, Germany, dated 10.05.2010
Fernando Najera , Executive Manager
Please observe the safety notes and precautions contained in the installation
and operating instructions that are shipped with the product.