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FORUM
BEDIENUNGSANLEITUNG & GARANTIEKARTE
MODE D’EMPLOI & CARTE DE GARANTIE
ISTRUZIONI OPERATIVE & CARTOLINA DI GARANZIA
INSTRUCTIONS FOR USE & WARRANTY CARD
BEDIENINGSHANDLEIDING & GARANTIEBEWIJS
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FORUM
BEDIENUNGSANLEITUNG S. 5 - 17
Garantiekarte im Anhang
MODE D’EMPLOI P. 19 - 31
Carte de garantie jointe en annexe
ISTRUZIONI OPERATIVE PAG. 33 - 45
Scheda di garanzia in allegato
INSTRUCTIONS FOR USE P. 47 - 59
Warranty card in the appendix
BEDIENINGSHANDLEIDING P. 61 - 73
Garantiebewijs zie bijlage
01/2005
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CONTENTS
Dear Customer,
You have decided to buy a Hase tiled
stove.
Traditional craftmanship, elegant design
and the latest combustion technology
guarantee you years of enjoyment in
front of your FORUM stove.
The bodywork of the Hase stove comprises strong modern welded steel plates.
The stability and long service life of all
Hase models is ensured by both the
heat-resistant tiling of the fire box and
the temperature-stable special lacquer.
The top quality of all the materials is a
matter of course for us as is the greatest
possible care we take in production.
All control elements are easily located
and simple to use.
Please read through these operating
instructions carefully. They will give
you helpful hints and useful tips to
increase the pleasure you get from
your stove.
We hope that you will enjoy many
happy hours around your new Hase
stove.
Your
Hase-Kaminofenbau GmbH
1. INSTALLATION P.
1.1 Legal building regulations 48
1.2 Type of construction 48
1.3 The flue pipe 48
1.4 Heat-sensitive materials 48
2. OPERATION P.
2.1 Fuels 49
2.2 The combustion process 49
2.3 The combustion products 50
2.4 Your contribution to
protecting the environment 50
2.5 Heating between seasons 50
2.6 Wood moisture content and
calorific value 50
2.7 Drying and storing wood 51
2.8 Assessment of the wood
moisture content 51
2.9 Cleaning and maintenance 52
3. CONTROL AND
OPERATING ELEMENTS P.
3.1 The fuel selector 53
3.2 The shaking gate 53
3.3 The baking oven valve 53
3.4 The ash drawer 53
3.5 The throttle flap 53
4. HEATING P.
4.1 Initial Operation 54
4.2 Heating with wood 54
4.2.1 Closed operation 54
4.2.2 Open operation 55
4.3 Heating with brown coal
briquettes 56
5. SAFETY P.
5.1 Safe distances 57
5.2 Radiation zone 57
6. HINTS AND TIPS 58
7. TECHNICAL DATA 59
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INSTALLATION
1.1 Legal building regulations
Before installing your tiled stove we
recommend that you talk to your local
chimney sweep. He will advise you on
the relevant building regulations, supply
permission and perform the acceptance
test.
Also check whether the room in which
the FORUM stove is to be installed has
an adequate supply of fresh air. If the
windows and doors are sealed it may be
that the necessary supply of fresh air is
no longer ensured and the draught
levels required by your stove may be
insufficient. The performance of your
tiled stove is also dependent on the
draught from your chimney. This may be
impaired by the cross section of your
chimney or an effective chimney height
of less than 4.50 m. The effective chimney height is the distance between the
flue gas intake in the chimney and the
top of the chimney pot.
1.2 Type of construction
The stove may only be operated with the
fire box being closed. It can be connected to any chimneys already assigned.
For reasons of safety, the stove is equipped with a self-closing fire box door.
1.3 The flue pipe
The FORUM must be connected to a flue
pipe whose internal diameter is 150 mm.
All the parts must be fitted extremely
accurately at the connection points. The
pipe must be sealed well in the chimney
entrance and must not project into the
cavity of the chimney otherwise smoke
extraction will be impaired.
1.4 Heat-sensitive materials
If the floor is flammable, for example, if
made of wood, plastic or is carpeted,
etc., a floor plate must be used.
(Please also read Chapter 5: Safety).
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OPERATION
2.1 Fuels
In accordance with the First Ordinance
on the Implementation of the Federal
Emission Reduction Law, only fuels
which generate low quantities of smoke
may be used in stoves. For Hase stoves
these are exclusively:
- With open fire box doors only natural wood with bark, eg. in the form
of logs or bricks.
- With closed fire box doors in addition
to the fuel described above also
brown coal briquettes.
The following should f. e. NOT BE
BURNED:
- painted or plastic-coated wood
- wood treated with wood preservatives
- domestic waste
- paper briquettes (pollutants: cadmium, lead, zinc)
- damp wood (residual moisture
content over 20%)
Fig.: The combustion process
If the above materials are burned they
not only generate unpleasant smells but
also emissions which damage the environment and are harmful to the health.
Highly resinous kinds of wood (eg. spruce, pine, fir) tend to give off large quantities of sparks. These types of wood
should only be burned with the doors
closed. Twigs and sticks of wood should
only be used for lighting the fire.
2.2 The combustion process
The following conditions must be met
for burning solid fuels:
- The necessary supply of oxygen must
be available. This is generally taken
from the ambient air.
- The ignition temperature must be
achieved. This means the temperature
at which the fuel continues to burn
without interruption whilst giving off
large quantities of heat.
Steel expands very slightly on heating
and contracts again to the same degree
on cooling. The steel of which your
chimney stove is made also reacts to
fluctuations in temperature. Your stove
is however designed in such a way as to
allow the metal room to expand and
contract without damaging the stove.
During the firing process the internal
action in the steel produces a crackling
noise.
Wood combustion can be broken
down into three phases:
1. Drying phase
The moisture still contained in the airdried wood (approx. 15 - 20%) is evaporated. This is done at temperatures of
approx. 100°C. The wood must be provided with heat during the warming
phase for this purpose, which can be
achieved by quick-burning wood.
2. Degasification phase
At temperatures of between 100°C and
150°C the contents of the wood start
(slowly at first) to decompose and gasify
and the wood begins its thermal decom-
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OPERATION
position. At temperatures over 150°C
the gas development increases strongly.
The proportion of volatile components
makes up around 80% of the wood substance. The actual combustion begins
with the ignition of the resulting gases
at a temperature of around 225°C (ignition temperature) with the emission of
heat. There must be an adequate supply
of oxygen available for this purpose.The
peak of the combustion process is reached at a temperature of around 300°C.
The reaction is now so turbulent that
the largest amount of heat is released at
this point. Flame temperatures of up to
1100°C are possible.
3. Burn-off phase
Glowing charred wood remains after the
volatile components have been burned
off. This wood burns slowly and almost
without flames at a temperature of
approx. 800°C.
These processes do not only take place
consecutively in a wood fire, however,
but also simultaneously. The combustion
process is shown in the schematic diagram (s. Figure 1).
2.3 The combustion products
From a chemical point of view wood
mainly consists of the elements carbon,
hydrogen and oxygen.
Wood contains almost no substances
which are critical from an environmental point of view, such as sulphur, chloride and heavy metals. Therefore after
the total combustion of wood the main
gaseous products are carbon dioxide and
water vapour as well as a small quantity
of wood ash which is the solid combustion product.
If the wood does not combust fully on
the other hand, a series of pollutant
substances may be emitted, such as carbon monoxide (toxic), acetic acid, phenols, methanol (toxic), formaldehyde,
soot and tar.
2.4 Your contribution to protecting
the environment
Whether your chimney stove burns in a
manner that is harmful to the environment or not depends to a large extent
on how you operate it and the type of
fuel you use (see Section 2.1).
The following hints are intended to help
you with this:
- Use only dry wood, leaf-wood like
birch and beech are most suitable.
(see Sections 2.6 and 2.7).
- Only use small pieces of wood to light
the fire. These will burn more easily
than large logs and the temperature
required for total combustion of the
wood will be reached more quickly.
- Do not place too much wood in the
stove at one time. It is better to add
smaller quantities more frequently.
The quantity of wood must always be
adjusted to the amount of heat
required.
The quality of the combustion process
can be checked very easily by means of
the following features:
-
The colour and characteristics of the
ash.
If the combustion process is
good the result will be fine white ash.
Dark colouration indicates that the
ash contains charcoal residue. The
burn-off phase in this case has been
incomplete.
-
The colour of the flue gases emitted
from the chimney.
In this respect remember the following: the less colour in the flue gases
emitted from the chimney, the better
the quality of the combustion process.
2.5 Heating between seasons
Between seasons (in spring and autumn)
you may experience draught difficulties
in the chimney if the outdoor temperature is over 16°C. If no draught can be
created at these temperatures by a quick
fire (temporary generation of great heat
by rapidly burning paper or thin wood
chippings) you should not light the
stove.
2.6 Wood moisture content and
calorific value
The calorific value of the wood depends
largely on the wood moisture content.
The more water the wood contains, the
more energy must be used to evaporate
it. This energy is then lost for heating.
The more moisture the wood contains,
therefore, the less 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; wood
which has been well dried in the air, on
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OPERATION
the other hand, has a moisture content
of approx. 15% and a calorific value of
around 4.3 kWh/kg.
Therefore, if you use very moist wood
you will have around half the heat output with the same quantity of wood
than when you use dried wood. To be
also considered is the fact that if you
burn moist wood, the resulting water
vapour can condense in the flue pipe or
chimney. This can lead to pitting or the
chimney becoming sooted up. Furthermore, if the wood has a high moisture
content the combustion temperature is
reduced which prevents total combustion of all the wood components and
causes considerable pollution. The energy content of the unburned wood is also
lost.
It is quiet plain, therefore, that burning
inadequately dried wood is irresponsible
both from an economical and an ecological point of view.
2.7 Drying and storing wood
As explained under Section 2.6 low
wood moisture content is of great
importance. Therefore, the following
provides a few tips on how to dry and
store wood.
- Wood needs time to dry. It will dry in
the air outdoors after approx. one to
two years if stored properly.
- The wood should be stored ready for
use after being sawn and split. This
ensures rapid drying because smaller
pieces of wood will dry better than
logs several metres in length.
- Your logs should be stored in a ventilated, if possible sunny position and
be protected from rain (ideally facing
south).
- Leave a hand’s width between the
individual piles of wood so that air
can get in between them and remove
any escaping moisture.
- Do not cover the piles of wood with
plastic foils or tarpaulins because the
moisture will then be unable to escape.
- Do not stack fresh wood in a cellar
since it will rot rather than dry for the
lack of air movement.
- Only store dried wood in dry cellar
rooms.
2.8 Assessment of the wood
moisture content
For you as a stove user it is important to
be able to assess whether your wood is
air dry (with a residual moisture content
less than 20%) or whether it must be
stored for a longer period.
The air-dried condition has been reached when the moisture content of the
wood is in balance with the ambient air,
i.e. it no longer dissipates moisture to
the air and no longer takes moisture out
of the air. The weight of the wood is
characteristic for the moisture balance.
One method which allows you to assess
the moisture content is described here.
You must observe the points listed
under Point 2.7 as a basis for optimum
wood storage. Then proceed as follows:
- Take a log from various points in
your wood pile.
- Mark these logs to enable you to
identify them easily.
- Now weigh the logs on a kitchen
scale and make a note of their
weights.
- Now dry the logs artificially for
seve-
ral hours (eg. in a warm stream
of
convection air from the stove).
- Then placed the logs back in the
wood pile where they were.
- Weigh the logs again one or two
days later.
The moisture balance will be disturbed
by drying the logs. The logs will therefore try to reproduce the balance after
being dried by taking moisture out of
the air. If they achieve the same weight
as when they were first weighed they
have absorbed the same quantity of
water which they lost through being
dried. This means that the moisture had
balanced out before the wood was
weighed for the first time.
If, on the other hand, they are still lighter, there was more water in them before they were weighed for the first time
than required for the moisture balance.
Therefore, these logs have to be stored
for a while longer.
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CLEANING AND MAINTENANCE
2.9 Cleaning and maintenance
The tile stove and the flue pipe must be
inspected and cleaned after the heating
period, if necessary, more frequently.
The deflection plates can be removed for
this purpose.
The deflection plates are designed to
improve efficiency. The FORUM has
three deflection plates adapted precisely
to the air intake of the FORUM stove.
We will have to provide the steel stoves
with a finish of heat-resistant paint.
However, heat-resistant stove lacquers
do not provide protection against corrosion, with the result that a rust film may
form in unfavourable conditions, for
example caused through:
- the use of too much water for cleaning the floor/base plate area.
- spilt water from boilers or dishes.
- the positioning in "moist rooms", e.g.
conservatories, or the intermediate
storage in the building carcass/garage
Clean areas covered in a rust film with
emery paper and spray them with stove
lacquer spray (available at your Hase
specialist dealer).
Do not use any detergents containing
acid (e.g. citrus or vinegar detergents) to
clean the steel parts. Sufficient cleaning
can be achieved by wiping the steel
parts with a slightly dampened cloth.
When properly used the secondary air
produces an air curtain in front of the
glass panels which at the same time
delays them from becoming sooted up.
The glass panels can be cleaned when
they are in the stove or by removing the
fire box door.
To remove the fire box door undo the
top screws in the grips (the botom grub
screw adjusts the position of the handle
vertically) with the enclosed Allen key.
Then turned the handle towards the
inside until it is horizontal. This draws
the locking rod completely. The door can
now be lifted out. Proceed in the reverse
order to refit the door. The screws must
be done up tight again.
A time-tested environment friendly
method for cleaning the ceramic glass
panels with materials which are available in every household is as follows:
Take:
- 1 ball of kitchen paper, newspaper,
or the like
- wet it
- dip it into the cold wood ash
- wipe the glass with it
- wipe the glass with a clean ball of
paper and the job is done.
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CONTROL AND OPERATING ELEMENTS
3.1 The fuel selector
Before using the stove for the first time
set the fuel selector which is on the left
under the fire box door for the fuel you
will be using.
By setting this selector the air which is
drawn into the stove will be optimally
divided into primary and secondary air
for the particular type of fuel being
used.
By means of the control handle you can
set it to three positions - for briquettes,
wood or to off, when the stove is not in
use.
See brief operating instructions on
the hinged ash drawer panel.
3.2 The shaking grate
The shaking grate is used to shake any
unburned fuel (ash) into the ash drawer.
The grate is shaken by means of a slide
to the right under the fire box. By
moving the shaking grate slight to and
fro any ash on the grate will drop into
the ash drawer. If you are burning
brown coal briquettes the shaking grate
must be opened by pulling out the
handle.
See brief operating instructions on
the hinged ash drawer panel.
3.3 The baking oven valve
The rotary valve in the top of the baking
compartment is to be opened by turning
anticlockwise to enable steam to escape
when baking. Otherwise it is kept closed.
3.4 The ash drawer
The ash drawer must be emptied in good
time. Ash piling up can prevent primary
air from getting to the stove.
Please make sure that the ash is only
removed when it is cold.
The ash drawer stands in its turned over
lid when collecting ash. To empty the
drawer pull out the lid, turn it over and
push it on the ash drawer. This closes
the ash drawer and prevents flying ash.
This, in turn, keeps your home clean
when you dispose of the ash. The ash
drawer is put back into the stove by proceeding in the reverse order.
3.5 The throttle flap
The throttle flap is fitted in the flue pipe
and is used to regulate the flue gas flow.
It is not fitted in every flue pipe and is
also not absolutely essential. The
influence of the throttle valve on the
burn off is dependent on many factors,
including the chimney height and cross
section, the indoor and outdoor temperature, etc. When the handle is horizontal the throttle flap is closed.
If the fire box door is opened during the
firing process, first of all the throttle
valve must have been opened.
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HEATING
4.1 Initial Operation
Please observe that during the first 2 to
3 firings a distinct odor will be experienced.
4.2 Heating with wood
4.2.1 Closed operation
Lighting
It is important to pass through the lighting phase quickly since during the lighting or firing phase, higher emission
values may occur if mistakes are made
in regulating the stove. Therefore, we
would be grateful, for the sake of the
environment, if you would closely observe the following. The stove should
always be lit with wood. It is not sensible
to light the stove with briquettes.
Procedure
- Open the throttle flap entirely, if your
flue pipe has one
- Set control elements for wood
- Open fire box door
- Sweep remaining ash and any unbur-
ned charcoal into the middle
- Place screwed up newspaper, non-
coated cardboard or wood wool into
the middle of the firebox
- Place dry wood chippings around the
lighting material
- Place 3 - 4 small pieces of wood
around the outside
- Light the material at several points
- The fire box door should be left open
slightly during lighting to prevent
condensation on the glass
- Close the door when the wood is bur-
ning on all sides
- After a short time add 3 - 4 small logs
Position of control elements
- Position handle along the length of
the pipe
- Turn the fuel selector to the left (to
the mark „H“).
- Push shaking grate handle inwards
See brief operating instructions for
wood
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HEATING
4.2.2 Open operation
When burning wood as fuel the
FORUM can be used with either the
doors closed or open. However, we
recommend heating with doors closed
on the FORUM because this is better
for the enviroment.
Moreover, the efficiency of the stove
drops from approx. 75% to below 40%
when the doors are left opn.
The large glass panels in the doors give
you an unhindered view of the fire
even when they are closed.
Procedure
Lighting
- Light with wood as already described, see Section 4.2.1
- Open fire box doors as soon as heating temperature is reached
How to continue heating
- When the fire begins to glow put
more wood to the back of the fire
box
Never leave the FORUM stove burning
unattended !
Position of control elements
- Position handle along the lenght of
the pipe
See brief operating instructions for
briquettes
How to continue adding more wood
After the operating temperature has
been reached, it is possible to operate
the stove whilst producing very little
pollution if a few basic rules are followed. The FORUM 100 has a nominal
heating capacity of 7 kW. This means a
fuel feed rate of approx. 2.2 kg of
beech logs or 1.8 kg of brown coal briquettes per hour. The FORUM 115 has
a nominal heating capacity of 9 kW.
This means a fuel feed rate of approx.
2.9 kg beech logs or 2.4 kg of brown
coal briquettes per hour.
You can use these values as a guide.
During the lighting phase you should
add small logs. After heating temperature has been attained larger logs may
be added.
The output of heat should only be
regulated by the quantity of wood
added.
Procedure
- Open the throttle flap entirely, if
your flue pipe has one
- Slowly open the fire box door, so
that no smoke is emitted into the
room
- Place pieces of wood parallel to the
fire box opening
- Only add one layer of fuel
- Close doors
More fuel should be only added just
before the flames from the previously
used fuel die down
Position of control elements
- Position handle along the length of
the pipe
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HEATING
4.3 Heating with brown coal
briquettes
In addition to wood you can also use
brown coal briquettes to heat your
stove.
In accordance with the First Ordinance
on the Implementation of the Federal
Emission Reduction Law the fire box
doors must be closed when burning
briquettes.
Please note that heating with browncoal briquettes causes a sooty deposit
on the glass panes which cannot be
prevented.
Procedure
Lighting
- Light with wood as already described
How to continue heating
- When the fire begins to glow put 3 4 briquettes in the middle of the fire
box floor
- When adding more briquettes shake
the grate several times so that sufficient primary air is supplied to the
fuel through the grate
Position of control elements
See brief operating instructions for
wood!
- Turn flue selector handle to the
right (to the mark „B“)
- Pull out the shaking grate handle
See brief operating instructions for briquette
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SAFETY
5. Safety
The ash drawer is to be kept closed at all
times to prevent the tiled stove becoming overheated. Never use
methylated spirits; petrol or other
flammable fluids to light the stove.
As with all heating equipment, it is advisable to fit a guard for small children
so that they cannot touch the hot stove.
Children should never be left unat-
tended near the burning stove.
5.1 Safe distances
With flammable materials (eg. wood
panelling, plastic cladding and curtains)
the safe distance to the side and behind
the stove is at least 20 cm. Flammable
floor materials (eg. carpet, wood or plastic flooring) must be protected to the
front and side with a non-flammable
covering (eg. tiles, marble or steel plate)
(see Fig. 1).
According to DIN 18891 the following safe distances are valid when
using a covering for the floor:
A = min. 50 cm
B = min. 30 cm
C = with flammable materials at least
20 cm
Fig. 1: Dimensions of base plate
5.2 Radiation zone
No flammable or heat-sensitive materials are to be left within a distance of
80 cm in the radiation zone (see Fig. 2).
Fig. 2: Radiation zone
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HINTS AND TIPS
Problem
The wood does not light or only does so slowly
The wood burns without a bright, yellow flame,
smoulders or even goes out
Too much soot is generated, the insulating tiles do
not stay clean
Although the fire burns well the stove does not get
warm
The wood burns up too quickly
Smoke escapes into the room while the stove is burning
The chimney becomes wet and sooty, condensate
runs out of the stove pipe
Cause
The wood is too thick
The wood is too damp
The air supply is too low
The wood is too damp
The air supply is too low
The throttle flap is closed too far
The wood is too damp
The air supply is too low
The quantity of wood is too small and thus the combustion chamber remains too cold
The chimney draught is too strong
The chimney draught is too strong
The wood has been cut too small
Incorrect setting of operating elements
The air supply is too low
The throttle flap is closed too far
The chimney cross section is too small
The flue gas ducts in the stove pipe or chimney are
badly sooted
The wind is blowing down the chimney
The wood is too damp
The flue gases are too cold
The chimney is too cold
The chimney cross-section is to large
Remedy
Section 4.2 Continue heating
Section 2.8
Section 4.2 Lighting
Section 2.8
Section 4.2 Lighting
Section 3.5
Section 2.8
Section 4.2 Continue heating
Section 3.4
Section 3.4
Section 4.2
Section 4.2
Ensure supply of fresh air (i.e. open the window)
Section 3.3
Fit a draught booster (flue gas fan)
Section 2.9
Fit a wind guard on the chimney pot
Section 2.8
The stove pipe is too long and must be insulated The
chimney must be insulated
If you have any problems or questions please ask your dealer or your local chimney sweep.
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TECHNICAL DATA
Type description: FORUM 100
Standard reference: chimney stove to DIN 18891-1
The following data shall apply to the dimensions of
the chimney in accordance with DIN 4705:
Operation with fire box closed (design type 1)
Nominal thermal output 7 kW
Waste gas mass flow rate 9 g/s
Waste gas outlet temperature 335 °C
Minimum delivery pressure at
nominal thermal output 0,11 mbar
Minimum delivery pressure at
0,8x minimum thermal output 0,09 mbar
design type 1
Waste gas mass flow rate 29 g/s
Waste gas outlet temperature 240 °C
Minimum delivery pressure 0,10 mbar
The nominal thermal output of 7 kW indicated on the
unit's type plate will be sufficient for 56 - 144 m
3
depending on the isolation of the house
(volume in accordance with DIN 18893)
Height Width Depht
Oven 100 cm 58,2 cm 52,2 cm
Fire box 28 cm 37,5 cm 32,5 cm
Fire box opening 1050 cm
2
Pipe diameter internal 150 mm
Connection branch top
(Rear installation possible)
Height for top installation 98,6 cm
Height for rear installation, centre of the pipe
87,2 cm
Type description: FORUM 115
Standard reference: chimney stove to DIN 18891-1
The following data shall apply to the dimensions of
the chimney in accordance with DIN 4705:
Operation with fire box closed (design type 1)
Nominal thermal output 9 kW
Waste gas mass flow rate 9,5 g/s
Waste gas outlet temperature 350 °C
Minimum delivery pressure at
nominal thermal output 0,12 mbar
Minimum delivery pressure at
0,8x minimum thermal output 0,10 mbar
design type 1
Waste gas mass flow rate 26 g/s
Waste gas outlet temperature 300 °C
Minimum delivery pressure 0,10 mbar
The nominal thermal output of 9 kW indicated on the
unit's type plate will be sufficient for 82 - 200 m
3
depending on the isolation of the house
(volume in accordance with DIN 18893)
Height Width Depht
Oven 114 cm 67 cm 58 cm
Fire box 32 cm 44,5 cm 36,5 cm
Fire box opening 1536 cm
2
Pipe diameter internal 150 mm
Connection branch top
(Rear installation possible)
Height for top installation 112,7 cm
Height for rear installation, centre of the pipe
101,3 cm
Safety distances from flammable materials:
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