HWAM Autopilot IHS 3640 User manual

User's Manual
Gebruiksaanwijzing
Manuel d'utilisation
NL
FR
EN
01.11.2016 / 97-9664
3630 3650 3660
3640

Table of contents, English
Drawings ........................................................4-7
HWAM Autopilot IHSTM ............................................9
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Firing manual - wood ..............................................15
Firing in general ...................................................18
Maintenance......................................................19
Operational problems .............................................20
Declaration of Performance.........................................20
Inhoud, Nederlands
Tekenings ........................................................4-7
HWAM Autopilot IHSTM ...........................................21
Opstellings-, montage- en gebruikshandleiding .........................22
Handleiding stoken - hout ..........................................27
Algemeen........................................................30
Onderhoud ......................................................31
Bedrijfstoringen ...................................................32
Prestatieverklaring .................................................32
Table de matières, Français
Illustrations .......................................................4-7
HWAM Autopilot IHSTM ...........................................34
Guide de montage et d'installation ...................................35
Guide de chauffage - bois ..........................................40
Généralités.......................................................43
Entretien.........................................................44
Défauts de fonctionnement .........................................45
Déclaration de rendement..........................................45

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B2)
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B1)

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C.
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C1) C2)
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D1.
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E. E1.

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F.

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HWAM Autopilot iHS™
Congratulations on your new wood-burning stove complete with a HWAMAutopilot IHSTM
IHS is short for “Intelligent Heat System”, which is a digital control of the combustion in your new
wood-burning stove. The purpose of the HWAM Autopilot IHSTM is to control the combustion in an
environmentally optimal and economically efficient way, with a view to generating greater user comfort.
The HWAM Autopilot IHSTM is a new patented technology, which electronically adjusts the air supply to
the combustion chamber.Your new wood-burning stove continually measures the temperature and the
oxygen levels of the combustion. Moreover,it is programmed to supply oxygen to the fire through three
important air inlets in the right amount, and at the right time and place in the combustion chamber. By
downloading a free app for your smartphone or tablet, you can use the app among other things: to set
the thermostat to the desired room temperature level, choose time for night-time reduction and keep
your stove updated.The app also gives you current information on burning in the stove. See details in
separate manual.
Your new wood-burning stove and the HWAMAutopilot IHS
TM
will ensure the cleanest possible combus-
tion as well as a good fuel economy, regardless of external conditions such as the type of firewood used,
the chimney, the user’s experience, and other external circumstances.
The HWAM Autopilot IHSTM consists of the following components:
• Air box: the Air box contains a printed circuit board/software, as well as three motors that control
primary, secondary, and tertiary combustion air.The fresh air system can be mounted on theAir box
to the rear or in the bottom.
• Two sensors: a temperature sensor and an oxygen sensor transmit information from the wood-
burning stove to the Air box.
• Room temperature sensor:The room temperature sensor with batteries communicates with the
IHS system via a wireless connection. It should be placed so it does not have direct radiant heat
from the stove. Note that the maximum distance between stove and room temperature indicator
is about 10 metres.The range is reduced if there are walls or other obstructions between the stove
and the room temperature indicator.
• Electricity supply: from the Air box to the nearest wall socket.
• App "IHS Smart ControlTM":The app can be downloaded free from the App Store or Google Play
Store. See details in separate manual.
EngliSH
IHS Airbox
Wood-burning stove with
HWAM Autopilot IHS™
IHS app
Electricity supply
USB connection
Air box air inlet
Connection to fresh air system
Primary
air
Secondary
air Te r ti ar y
air
Oxygen sensor
Temperature sensor

10
inStAllAtion
General information
Installation of your HWAM woodburning stove must always comply with local building regulations. It is
a good idea to consult your local chimney sweep before installing, since he will be the one to sweep the
chimney and stove.
Always follow the instructions of the manual carefully and make sure that the installation is carried out
by a qualified professional. HWAM packaging material should always be handled in accordance with the
local rules for waste handling.
Room requirements
There must be a constant supply of fresh air to the room in which the stove is to be installed. The
woodburning stove uses approx. 13-17 m3air per hour. In comparison, a modern cooker hood sucks up
to 1000m3air per hour.A window that opens or an adjustable air vent should be sufficient, but it is also
possible to connect the stove to a HWAM fresh air system.The air inlet/grating must be placed so that
they do not become blocked.
Technical data
Before installing the stove, you must ensure that the load-bearing capacity of the floor can withstand the weight
of the stove and the chimney. The weight of the chimney should be calculated according to its dimensions and
height.Weight of the stove:
Model Weight Height Width Depth
HWAM 3630 136 kg 114,8 cm 55,6 cm 44,2 cm
HWAM 3640 136 kg 114,8 cm 55,6 cm 44,2 cm
HWAM 3640 w/soapstone cover 226 kg 114,8 cm 60,0 cm 44,2 cm
HWAM 3650 168 kg 150,8 cm 55,6 cm 44,2 cm
HWAM 3650 w/heat-storing stone 223 kg 150,8 cm 55,6 cm 44,2 cm
HWAM 3660 168 kg 150,8 cm 55,6 cm 44,2 cm
HWAM 3660 w/heat-storing stone 223 kg 150,8 cm 55,6 cm 44,2 cm
HWAM 3660 w/soapstone cover 279 kg 150,8 cm 60,0 cm 44,2 cm
HWAM 3660 w/soapstone cover
and heat-storing stone
334 kg 150,8 cm 60,0 cm 44,2 cm
The stove is mainly made of sheet iron, with some items made of cast iron.The HWAM Autopilot IHSTM
is an electronic product primarily consisting of plastic, a printed circuit board and wires.
Test results from nominal test EN 13240
Nominal heating effect 6.0 kW
Smoke temperature 269ºC
Exhaust gas flow 5,04 g/s
Efficiency 80,7 %
The test result according to NS 3058
Particle emission 1,78 g/kg
Distance to inflammable materials
Your HWAM woodburning stove should always be installed on a non-combustible hearth. If it is installed
on a wooden floor or similar, the floor must be covered with a non-combustible material.

11
Drawing A HWAM 3630/3650
Min. distances:
HWAM 3640/3660
Min. distances:
1. Recommended for brick wall, back, cm 10 10
2. Recommended for brick wall, side, cm 15 10
1. For inflammable wall, back, cm 10 10
2. For inflammable wall, side,cm 40 40
1. To inflammable wall,corner installation,cm 35* 20*
3. Distance to furnishings in front, cm 90 90
*All dimensions in connection with corner installation are only recommendations.Contact your chimney
sweep for a clarification.
Please be aware that not all glass parts are heat-resistant. For this reason, a glass wall should sometimes
be treated as a flammable wall, in which case we ask you to contact your local chimney sweep or glass
producer to hear at what distance the stove should be kept from glass.
Remember to pay attention to any regulations concerning the required distance between
the wall and smoke pipe.
The distance to a brick wall is set to faciliate the servicing of the HWAM Autopilot IHSTM.
Requirements for chimney and smoke pipe
The chimney must be of a sufficient height to enable an adequate draft and to prevent smoke problems.The
stove requires a draft of at least 12 Pa.
The chimney must have a minimum opening equivalent to Ø 15 cm.The chimney opening should always
be at least the size of the outlet socket of the stove.The chimney must have an easily accessible soot door.
Smoke pipe and chimney must always be suitable for a stove connection. Ask your HWAM dealer for
more information.
Changing the smoke outlet from top outlet to rear outlet (HWAM 3630/3640 IHS)
(Drawing E)
1. Removing sides. Lift one side about 10 mm and pull it away from the stove so that it disengages from
the guide pins on the bottom plate of the stove. Repeat on the other side.
2. Removing the top plate (7).Remove the four screws (14) (Torx Bit no.30 or M6 nut) beneath the top
plate, two on each side, and lift the top plate off.
3. Removing the rear plate (1). Remove the two screws in the middle of the rear plate. Lift the rear
plate and pull it away from the stove so that it disengages from the guide pins on the bottom plate of
the stove.There is a cut-out in the rear plate for the smoke outlet. Break off the plate (6) within this
cut-out to make a hole in the rear plate so there is room for the smoke outlet.
4. Remove the heat shield (2) by lifting it off the stove.The heat shield has a cut-out for the flue duct.
Break off the pre-cut plate (9); the resulting hole fits the flue duct.
5. Removing the cover plate (3).Remove the cover plate on the back of the stove by removing the three
screws (Torx Bit no. 30).
6. Open the metallic tabs (8) and take the wires out.
7. Pull the lambda sensor coupling (7) free of the wire fastener (9).
8. Remove the temperature monitor (12) from the smoke ring.
9. Installing a heat shield (2). Replace the heat shield at the back of the stove.
10.Removing the flue ring (10).To remove the flue ring (above the combustion chamber), unscrew the
three screws. Lift the flue ring off the top of the stove.
11.The temperature gauge (12) and the lambda sensor coupling (7) are pulled out from the left side of
the wood section and pushed in again through the hole in the right-hand side so that the wires are
kept on the left side of the stove when seen from behind.

12
12.Reattach the temperature monitor (12) in the smoke ring, leading the sensor about 3 cm into the
smoke ring.
13.Installing the cover plate (3). Place the cover plate over the hole (above the combustion chamber,
where the flue ring was just removed) and fasten with the three screws (Torx Bit no. 30).
14.Installing the flue ring (10). Insert the flue ring into the smoke outlet hole in the rear of the stove and
secure it with the three screws.NB:Remember to turn the lambda probe (11) as illustrated in drawing
E1.
15.Reposition the lambda sensor coupling (7) in the wire fastener (9).
16.Fix the two wires by closing the metallic tabs (8) again.
17.Installing the rear plate (1). Place the rear plate on the guide pins; then press it in towards the stove.
Lift the rear plate and press it lightly inwards until it engages with the guide pins.Fasten the two screws
in the middle of the rear plate again.
18.Installing the top plate of the stove (7). Place the top plate on the fittings and secure it with the four
screws (14), two on each side.
19.Installing sides. Put the sides on the guide pins in the bottom plate of the stove and press them in
towards the stove. Lift the sides and press them lightly inwards until they engage with the guide pins.
An accessory top cover is available to cover the hole in the stove top plate if the smoke outlet is connected
at the rear of the stove.
Changing the smoke outlet from top outlet to rear outlet (HWAM 3650/3660 IHS)
(Drawing E)
1. Removing the rear plate (1). Remove the two screws in the middle of the rear plate. Lift the rear
plate and pull it away from the stove so that it disengages from the guide pins on the bottom plate of
the stove.There is a cut-out in the rear plate for the smoke outlet. Break off the plate (6) within this
cut-out to make a hole in the rear plate so there is room for the smoke outlet.
2. Remove the heat shield (2) by lifting it off the stove.The heat shield has a cut-out for the flue duct.
Break off the pre-cut plate (6); the resulting hole fits the flue duct.
3. Removing the cover plate (3).Remove the cover plate on the back of the stove by removing the three
screws (Torx Bit no. 30).
4. Remove the front of the heat storage compartment (4). Loosen the two screws (5) on each side of
the front of the heat storage compartment without removing them. Then pull the front forward.
5. Open the metallic tabs (8) and take the wires out.
6. Pull the lambda sensor coupling (7) free of the wire fastener (9).
7. Remove the temperature monitor (12) from the smoke ring.
8. Removing the flue ring (10).To remove the flue ring at the bottom of the heat storage compartment
(above the combustion chamber), unscrew the three screws.Lift the flue ring off the top of the stove.
9. The temperature gauge (12) and the lambda sensor coupling (7) are pulled out from the left side of
the wood section and pushed in again through the hole in the right-hand side so that the wires are
kept on the left side of the stove when seen from behind.
10.Reattach the temperature monitor (12) in the smoke ring, leading the sensor about 3 cm into the
smoke ring.
11.Installing the flue ring (10). Insert the flue ring into the smoke outlet hole in the rear of the stove and
secure it with the three screws.NB:Remember to turn the lambda probe (11) as illustrated in drawing
E1.
12.Reposition the lambda sensor coupling (7) in the wire fastener (9).
13.Fix the two wires by closing the metallic tabs (8) again.
14.Installing the cover plate (3).Place the cover plate over the hole in the bottom of the heat storage compart-
ment (where the flue ring was just removed) and fasten with the three screws (Torx Bit no. 30).
15.Installing the rear plate (1). Place the rear plate on the guide pins; then press it in towards the stove.
Lift the rear plate and press it lightly inwards until it engages with the guide pins.Fasten the two screws
in the middle of the rear plate again.

13
16.Installing the front on the heat storage compartment (4).Place the front on the heat storage compart-
ment and fasten with the four screws (5).
An accessory top cover is available to cover the hole in the stove top plate if the smoke outlet is connected
at the rear of the stove.
Fitting the loose parts
Before the stove is installed, you must ensure that all loose parts are fitted correctly. Make sure that the
chimney is tight and that no false draft is caused around neither the cover plate, in connection with a
covered smoke outlet, nor the cleanout door and pipe connections. Please note that bent and/or hori-
zontal smoke pipes will reduce the effect of the chimney draft.
Vertical cross-section of the stoves (Drawing B)
B1: HWAM 3630, HWAM 3640
B2: HWAM 3650, HWAM 3660
1. Smoke shelf. Must be placed on the steel rail and the holder at the front in the middle.
2. The baffle plate is suspended on three hooks beneath the top plate.One of the hooks has an additional
flap that is bent upwards as protection during transport.This flap should be removed with the help
of a screwdriver before installation.
3. The rear smoke outlet has been closed at the factory by screwing a plate over it and it is therefore
hidden behind the rear plate.
4. Removable rear plate.This must always be mounted if the stove is placed next to a combustible wall.
5. Loose heat shield.This must always be mounted if the stove is placed next to a combustible wall.
6. Loose heat shield beneath the ash pan. Can be used as a lid when the ash pan is removed for emptying.
Connection to chimney
All the stoves have both rear and top smoke outlet that can be connected to an approved steel chimney on
top or directly out at the rear to a chimney.
Make sure that the chimney is tight and that no false draft is caused around neither the cover plate, in
connection with a covered smoke outlet, nor the cleanout door and pipe connections. Please note that
bent and/or horizontal smoke pipes will reduce the effect of the chimney draft.
Vertical cross-section of smoke flue (Drawing C):
C1: Top smoke outlet
C2: Rear smoke outlet
1. Steel chimney.
2. Flue gas elbow. Fits into smoke flue socket.
3. Brick-built jamb of flue.
4. Built-in pipe sleeve. Fits smoke flue.
5. Wall rosette. Covers disruption to wall around pipe sleeve.
6. Joint. Sealed with packing material.
7. Smoke outlets of the HWAM stove.
8. Cover plate in the external rear plate – break off if a rear outlet is required.
9. Cover screwed in position: secure it to the top plate with screws if a rear outlet is required.
10. Smoke bushing: to be screwed to the back of the stove if a rear outlet is required.
11. Adjusting damper in smoke pipe.
12. Cleaning hatch.
13. Smoke pipe to rear outlet.
14. Loose cast iron cover: to be placed on the top plate when there is a rear outlet.

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Connecting and preparing the HWAM Autopilot IHSTM
Before the stove can be used it must be connected and prepared.Start by connecting the power adapter
to the Airbox that sits in the space under the combustion chamber.
Air box withour power supply. Air box with power supply.
Follow the instructions in the separate manual for linking stove, room temperature sensor and app.If you
do not wish to use an app to control the stove, a remote control can be purchased. In this case, follow
the instructions in the manual supplied with the remote control.The remote control replaces the use of
room temperature sensor and app.
Before the first lighting of the stove, it is important to run a self-test of the system to ensure that every-
thing works as it should.See separate instructions for either app or remote control for more information.
Chimney
The chimney is the “engine” of the stove and it is crucial for the functioning of the woodburning stove.
The chimney draft provides a partial vacuum in the stove.The partial vacuum removes the smoke from
the stove, sucks air through the damper to the so-called pane flush mechanism, which keeps the window
pane soot free, and sucks air into the combustion via the HWAM Autopilot IHSTM.
The chimney draft is created by the differences in temperature inside and outside the chimney.The higher
the temperature within the chimney, the greater the draft (a brick chimney takes longer to warm up than
a steel chimney). On days where the weather and wind conditions create insufficient draught inside the
chimney, it is even more important to warm up the chimney as quickly as possible.The trick is to quickly
get some flames going. Split the wood into extra fine pieces, use an extra firelighter, etc.
If the stove has not been used for a longer period, it is important to check that the chimney pipe is not
blocked. It is possible to connect several devices to the same chimney. However, it is important to first
check the applicable rules.
Even a good chimney can function badly if it is not used correctly. Similarly, a bad chimney may function
well if used correctly.
Chimney sweeping
To prevent the risk of chimney fires,the chimney must be cleaned every year.The flue duct and the smoke
chamber above the baffle plate must be cleaned together with the chimney. If the chimney is too tall to
be cleaned from above, it must be equipped with a soot door.
In case of a chimney fire and overheating, the HWAM Autopilot IHSTM will enter a security mode and
automatically adjust all dampers, effectively quenching the fire. Do not open the stove door, since that
might cause the fire to rekindle. Contact the fire brigade.After a fire, the stove should be checked by a
chimney sweep before use.

15
Firing MAnuAl - Wood
When you light the stove for the first time it should not be stoked excessively as all the materials must be
given time to adapt to the effects of heat.The lacquer will be fully hardened after the stove has been used,
and the door and the ashpan should be opened very carefully as there will otherwise be a risk that the
gaskets will stick to the lacquer. In addition the lacquer may initially give off an unpleasant odour, so make
sure that the room is well ventilated.
Tips about fuel
Approved fuel types
The wood burning stove is EN approved for combustion of wood only. It is recommended to use dried
chopped wood with a water content of a maximum of 18%. Stoking a fire with wet wood results in soot,
environmental problems, and a less efficient fuel economy.
Recommended wood types
All types of wood,for instance birch,beech,oak,elm,ash,conifers,and fruit trees can be used as fuel in your
wood burning stove.The great difference is not in the fuel value, but in the weight of the wood types per
cubic metre.Since beech weighs more per cubic metre than for instance common spruce,it will take more
common spruce to produce the same amount of heat that you would get from a cubic metre of beech.
Banned fuel types
It is not allowed to stoke a fire with the following: printed matter, plywood, plastic, rubber, fluid fuels,
and rubbish such as milk cartons, lacquered wood or impregnated wood or fossil fuels.The reason that
you should not apply any of the above is that during combustion they develop substances that are health
hazardous and harmful to the environment.These substances could also damage your wood burning stove
and chimney, rendering the product warranty void.
Storage of wood
The wood’s water content of a maximum of 18% is reached by storing the wood for a minimum of one
year, preferably outdoors in an open shed exposed to sun and wind.
The wood must be dry (max. 18% water contents) before it is stored indoors. It is recommended that
kindling wood is stored indoors for a couple of days prior to use.
Recommended dimensions
The dimensions of the fuel are important to good combustion.The dimensions should be as follows:
Fuel type Length in cm Diameter in cm
Wood for kindling a fire (finely chopped) 25-33 2-5
Chopped wood 25-33 7-9
Special fire lighting guide for stoves with soapstone or sandstone cladding
Soapstone and sandstone are natural products which need to adjust to temperature changes. We
recommend following the procedure below:
1.The first stoking
Open the door. Place split kindling with a diameter of 2-5 cm the equivalent of approx. two pieces of
wood (a maximum of two kilos) in the stove. Place two fire-lighters in between the top layers of kindling.
Light up the fire-lighters and close the stove door. Set the temperature level to level 1. Let the fire burn
out and do not restoke even if there is a restoking alarm.When the fire has died out completely, the door
must be opened and stay open while the stove cools down to room temperature.
2.The second stoking
Open the door.Place split kindling with a diameter of 2-5 cm the equivalent of approx.two pieces of wood
(a maximum of two kilos) in the stove. Place two fire-lighters in between the top layers of kindling. Light
up the fire-lighters and close the stove door. Set the temperature level to level 2.When there is a restok-
ing alarm, you should restoke. Fill the combustion chamber half way up with dry wood of a diameter of

16
approx.7-9 cm.Let the fire burn and let the stove cool down to room temperature before the next lighting.
3.The third stoking
Repeat the second stoking, but use more wood this time. Set the temperature level to level 3. Let the
fire burn and allow the stove to cool down after the fire has died out.
Restoking:
Follow the general instructions, see the sections “Lighting the stove” and “Stoking”.
Lighting Up
A successful combustion process requires that the wood is lit in the right way.A cold stove and a cold
chimney challenge the combustion process. Be careful to make a good lighting with suitably dry wood,
using kindling and lighting the fire in the top layers of kindling.
Open the door. Place two pieces of wood (5-8 cm in diameter) horizontally in the
bottom of the combustion compartment. Place 5-8 pieces of kindling randomly
on top. Place two fire-lighters in between the top layers of kindling. Light up the
fire-lighters and close the stove door. Select the desired room temperature level.
When the door of the stove is opened the IHS system is activated. If lighting up does not occur within
15 minutes, the system will automatically go back to standby and the dampers will be closed.
If the flue gases do not reach a high enough temperature for kindling or firing, IHS Smart ControlTM and
the wireless room temperature sensor emit a stoking alarm, even if there is still unburned wood and
flames in the combustion chamber.The stoking alarm is emitted to make you aware that the fire needs
more energy. Restoking with small pieces of kindling wood can often provide a more rapid and sufficient
temperature rise.
HWAM Autopilot IHSTM closes all three air dampers when the stove is in standby mode.This prevents
hot air from the room to enter the chimney (heat loss).This might on the other hand result in a very
cold chimney when the stove is lit. In certain cases it is necessary to assist the draught in the chimney
by burning a couple of newspaper pages on top of the wood ready to be lit. Read more on www.hwam.
com about the function of the chimney.
Important!
The door must not be opened when lighting up. It must always be closed when the stove is in use. Oth-
erwise the stove’s intelligent control system does not function.The door should only be opened when
lighting up, when restoking, and when cleaning the stove. Never leave a stove before there are lasting
flames in the wood after firing!
The Thermostat Function
The HWAM Autopilot IHSTM will in general have an environmentally friendly combustion and adapt to
the desired room temperature.The thermostat function is designed as a radiator valve.The user enters
a desired heat level, which suits the room in which the stove is installed.When the thermostat is set at
a heat level, the control function will adapt to this temperature.
• If the room temperature is lower than the desired heat level, the control function increases the flue
gas temperature in order to increase the heat radiation from the stove.
• If the room temperature is higher than the desired heat level, the control function decreases the flue
gas temperature, thereby giving the layer of embers as long a life as possible before re-stoking.This will
reduce the heat radiation from the stove and facilitate re-stoking without having to light up the fire
anew. If the room temperature drops below the desired level, the ember phase will be shortened, and
the system will activate a re-stoking alarm.The system will signal that a re-stoking is due at the flue gas

17
temperature of 180° C, and at 100° C the system will enter standby mode and all dampers will close.
• Should the room temperature be much lower than the desired heat level,the control function increases
the flue gas temperature. If a satisfactory increase in temperature does not occur, the control will
activate a re-stoking alarm,since it expects that more wood is needed to increase the heat level in the
room.
• If the room temperature after a new re-stoking still does not reach the desired level,the water content
in the firewood may be too high or the draught in the chimney too weak.The IHS system always strives
for a sufficiently high flue gas temperature to ensure an environmentally friendly combustion.
Stoking
When alarm for re-stoking sounds the stove is ready for re-stoking.The alarm for re-stoking will come
via the room temperature sensor or the acquired remote control.The app IHS Smart ControlTM will
also come with a notification that it is time for re-stoking if the app is opened. For more information on
the app, see separate manual.
The amount of wood that is used for re-stoking should be adjusted based on the current heat demand.
Small amount of wood Medium amount of wood Large amount of wood
(700 - 1200 g) (1000 - 2000 g) (1800 - 3000 g)
In terms of combustion technique, you should always stoke the stove with at least two pieces of wood
at a time even if you only use a small amount of wood.You can also choose not to restoke.After a while
the stove will then automatically go into hibernation.
Important!
Never leave a stove before there are lasting flames in the wood after re-stoking!
During combustion, the outer surfaces of the stove will become hot, and due care must
therefore be shown.
Fuelling with coal, wood briquettes or pet coke
The stove is not approved to use coal or pet coke as a fuel. However, wood briquettes can be used to
fuel the fire and should be placed on the embers produced by the burned wood.
Be aware that using fuels other than wood, will cause soot to form on the glass pane.
Operating the heat compartment damper
There is a damper at the back of the stove between the top plate and the heat compartment that opens
and closes the flow of convection air in the heat compartment.The supply of convection air can be opened
by moving the damper to the left and closed by moving the damper to the right.
We recommend that the convection damper is kept closed when fuelling the stove in order to heat up
and thereby store heat in the heat storage stones in the heat compartment as rapidly as possible.
Keeping the convection damper closed retains the heat stored in the heat storage stones as long as pos-
sible.When the damper is opened, the heat from the heat storage stones in the heat compartment will
rapidly be transferred to the room.

18
Firing in gEnErAl
Rapid or fierce heat
Rapid or fierce heat is obtained by burning many small pieces of wood.
Maximum amounts of fuel:
The maximum allowed amount of fuel per hour is:
Wood: 3.1 kg
If these limits are exceeded,the stove will no longer be covered by the factory guarantee, and it may also
become damaged due to excessive heat.The stove has been approved for intermittent use.
Typical re-firing interval
Typical re-firing interval at nominal performance
Wood: 65 min
Long burning times
You achieve the slowest combustion by setting the desired room temperature at level 0. At this level
the combustion takes place with the lowest possible flue gas temperature and the ember phase will be
drawn out as long as possible.
How to achieve the best combustion
The HWAM Autopilot IHSTM is purposely designed to generate the cleanest and the most economical
combustion. A good combustion is achieved when the fire gets the right amount of oxygen supply at
the right time and place in the combustion chamber.The HWAM Autopilot IHSTM allows for variations
in external circumstances. Nevertheless, it is important to use clean and dry wood (humidity approx.
16-20%). Read more on www.hwam.com.
Cleaning the glass
We recommend wiping the glass after a fire.This is best done using a paper towel.
Types of fuel
The stove may be damaged by very high temperatures and the glass may turn white,for example.This can
be avoided by never allowing the stove to burn with the ashpan open and taking great care with types
of fuel that develop excessive heat, such as briquettes. If the flue gas temperature exceeds 580oC, the
HWAM Autopilot IHSTM will revert to safety adjustments and automatically turn down the air valves to
avoid overheating.When the temperature is reduced to 450oC, the normal functions apply again.
It is recommended that you use birch or beech wood that has been chopped and stored for at least one
year in an open shed exposed to sun and wind.The wood must be dry (max.18% water contents) before it
is stored indoors.It is recommended that kindling wood is stored indoors for a couple of days prior to use..
Briquettes give off a lot of heat. Certain types expand considerably, thus causing an uncontrollable com-
bustion.
Coal burns at a high temperature and makes a lot of soot. Coal must be burned using the coal insert.
Not suitable for fuel in these models.
Coke burns at a high temperature and makes a lot of soot. Coke must be burned using the coal insert.
Coke causes severe wear and tear to stove and combustion chamber and,consequently,this considerably
reduces the life expectancy of the stove and chimney.
Not suitable for fuel in these models.

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The stove is EN 13240 approved for firing wood only. No particle board, lacquered, painted
or treated wood, plastics, or rubber may be burned.
MAintEnAncE
Cleaning
Any maintenance of the stove should only be carried out when it is cold.Daily maintenance is limited to
vacuum cleaning the stove externally, using the soft brush attachment.You can also dust the stove using a
dry, soft cloth or brush. But remember, only when the stove is cold.Do not use water, spirit or any other
kind of cleaner, as this will damage the lacquer.
Once a year, the stove should be thoroughly serviced.The combustion chamber should be cleared of
ashes and soot.
The hinges and the closing hook must be greased with liquid copper fat spray (heat-resistant up to 1100
degrees Celsius), see drawing F. Lift the door approx. ½ cm and spray copper fat onto the hinge leaf.
Service inspection
Your stove should be given a thorough, preventive inspection once every two years.This includes:
• Thorough cleaning of the stove.
• Checking gaskets. Replace gaskets if they are not intact or are no longer soft.
• Checking and/or replacing insulation material.
• Checking the construction (only some countries).
• Checking the bottom and/or shaking grate.
• Use copper grease for hinges and locking hooks (see drawing F).
All service checks must be performed by an authorised fitter. Use only original spare parts
Inside cleaning
The smoke shelf and baffle plate is to be removed from the stove before cleaning (Drawing D):
• Lift the smoke shelf (1) off the steel rail (2) at the back of the combustion chamber.Then lower it
beneath the holder (3) and tilt it out.
• The baffle plate (4) is lifted from the holders (5), under the top plate and edged out.
Ashes
It is easiest to empty the ash pan by pulling a plastic bag over it, turning it upside down and then carefully
removing it from the bag.Ashes are disposed of via the domestic waste collection.
Please note that there may be embers in the ashes for up to 24 hours after the fire has
gone out!
Insulation
The efficient, but porous insulation of the combustion chamber may,in time, become worn and damaged.
Cracks in the insulation have no effect on the efficiency of the stove.The insulation should be replaced,
however, when it is reduced to less than half the original thickness due to wear and tear.
Door/glass
A sooty glass door can easily be cleaned with a piece of moist kitchen roll dipped in ash. Go about it in
vertical movements (up and down).Follow up with a dry piece of kitchen roll.Check frequently to ensure
that seals in the door are intact and not brittle.Failing this,they should be replaced. Use original seals only.
Surface
The surface normally requires no treatment.Any damage to the coating may be remedied using a Seno-
therm spray.

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Guarantee
The guarantee does not cover damage due to insufficient maintenance!
Maintenance Warnings
If a maintenance warning goes off,you can continue using the wood-burning stove,but contact your dealer
as soon as possible.Your stove could be affected by impure combustion.
opErAtionAl problEMS
Blackened glass
•The wood is too damp. Only use wood stored for at least 12 months under cover and with a moisture
level not exceeding 18% RH.
• The door gasket may be leaking.
Smoke in the room when opening door
• The grate in the chimney may be closed. Open the grate.
• Insufficient chimney draft. See section on chimney or contact chimney sweep.
• Soot door leaking or dislodged. Replace or refit.
• Never open the door when there are still flames on the wood.
Uncontrollable combustion
• Faulty seal in door. Fit new seal.
Safety Alarms
In case the safety alarms go off, you must not use the stove. Contact your dealer as soon as possible.
At interruptions that you cannot yourself rectify, you should contact the dealer.
dEclArAtion oF pErForMAncE
The DoP can be downloaded from our website via the following links:
HWAM 3630 with Autopilot IHSTM: www.hwam.com/dop/3630ihs-3650ihs
HWAM 3650 with Autopilot IHSTM: www.hwam.com/dop/3630ihs-3650ihs
HWAM 3640 with Autopilot IHSTM: www.hwam.com/dop/3640ihs-3660ihs
HWAM 3660 with Autopilot IHSTM: www.hwam.com/dop/3640ihs-3660ihs