Table of contents, English
Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
HWAM Autopilot IHS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Remote control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Firing manual - wood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Firing in general. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Operational problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Declaration of Conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
9 1
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. A window
that opens or an adjustable air vent should be sufficient, but it is also possible to connect the stove to a
HWAM combustion air system.The air inlet/grating must be placed so that they do not become blocked.
Load-bearing capacity of floor
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.
Technical data
HWAM 3520
HWAM 3520 w. soapstone cover
HWAM 3530
HWAM 3530 w. soapstone cover
114 kg
164 kg
124 kg
184 kg
125,8 cm
135,8 cm
143,8 cm
153,8 cm
54,0 cm
54,0 cm
54,0 cm
54,0 cm
37,1 cm
37,1 cm
37,1 cm
37,1 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
Smoke temperature
Exhaust gas flow
4.5 kW
4.02 g/s
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.
HWAM 3520, HWAM 3530 (Drawing A)
10 cm
1. Recommended for brick wall
10 cm
1. For inflammable back wall
41 cm
2. For inflammable side wall
25 cm
1.To inflammable wall,corner installation*
80 cm
3. Distance to furnishings in front
*All dimensions in connection with corner installation are only recommendations. Contact your chimney sweep
for a clarification.
Remember to pay attention to any regulations concerning the required distance between
the wall and smoke pipe.
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.
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 150 mm.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.
Smoke pipe and chimney must always be suitable for a stove connection. Ask your HWAM dealer for
more information.
Installing soapstone in the heat compartment (Drawing I)
1. Lift one of the stove sides (1) 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. Remove the four screws (2) (Torx Bit no. 30) beneath the top plate, two on each side, and lift the top
plate (3) off.
3. Remove the smoke ring (4) at the top of the stove by loosening the three screws (5) (Torx Bit no. 30).
4. Remove the two pins (6) - one on each side - that lock the top plate of the heat storage compartment.
Lift the top plate (7) slightly at the front and pull it away from the guide pins (8) found at the rear.
5. Remove the smoke pipe (9) from the heat storage compartment.
6. Loosen the two screws (10) on each side of the heat storage compartment that support the front
plate of the heat storage compartment (11), and remove the front plate.
7. Place soapstone slabs (12) in the heat storage compartment making sure that the hole in every slab
is right above the smoke ring.
8. Reattach the front plate of the heat storage compartment (11).
9. Lead the smoke pipe (9) through the hole in the soapstone slabs and down into the smoke ring at the
bottom of the heat storage compartment.
10.Reposition the top plate of the heat storage compartment (7) in the guide pins (8) at the rear; once
the top plate is correctly in place, lock it with the two pins (6).
11 Mount the smoke ring (4) on top of the top plate of the heat storage compartment using the three
screws. (5).
12.Place the stove top plate (3) on the fittings (13) and secure it with the four screws (2), two in each side.
13.Put one of the stove sides (1) on the guide pins in the bottom plate of the stove, and then press it
in towards the stove. Lift the side and press it lightly downwards until it engages with the guide pins.
Repeat with the other side.
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 B and C)
B: Top smoke outlet
C: Rear smoke outlet
Steel chimney (9).
Flue gas elbow (10). Fits into smoke flue socket.
Brick-built jamb of flue (11).
Built-in pipe sleeve (12). Fits smoke flue.
Wall rosette (13). Covers disruption to wall around pipe sleeve.
Joint (14). Sealed with packing material.
Smoke outlets (15) of the HWAM stove.
Smoke flue regulating damper (16).
Soot door (17).
Fitting the loose parts
Before the stove is installed, you must ensure that all loose parts are fitted correctly.
Vertical cross-section of the stoves (Drawing B):
• The smoke shelf (5). To be placed on top of the steel rail and on the holders in the sides.
• Two-piece smoke defector plate (6). Each half is hung on the hooks located beneath the top plate.The two
halves join in the holders behind the air pipe. Once the stove has been installed, twist the protection off
the two hooks by using pliers or a screwdriver.
• Cover plate (7). Should always cover the grate.
• Removable rear plate (2), covering automatic controls. This must always be mounted if the stove is
placed next to a combustible wall.
• Loose heat shield (8) under the ash pan. This can be used as a lid when the ash pan is removed for
Connecting and preparing the HWAM Autopilot IHSTM
1. Connect the plug
a) to a normal 230V socket
b) to the Air box in the wood section underneath the combustion chamber (lead the plug through
the air slot at the bottom between the side and rear plates - on the left side of the wood-burning
stove when seen from the front. There is a mark on the Air box where the plug should be let in. See
the photo of the power supply on the Air box.
Air box withour power supply
Air box with power supply
2. Insert three AA batteries in the remote control.
3. Go through the self-test of the HWAM Autopilot IHSTM:
The self-test of the electronic control is carried out before lighting the first fire in the stove. Press the
remote control button for five seconds in order to enter the menu. Press the button until the cursor
reaches “Self-test”. Wait a few seconds till the remote control enters the “Self-test” menu. Press the
button till the cursor reaches “Engage”. A few seconds later the self-test begins.
By going through a self-test you ensure that all basic operations function correctly.
A self-test consists of four test types:
• A software test
• A test of the temperature sensor
• A test of the lambda sensor
• A test of the three motor valves
The remote control will respond with the text ”Pass” if everything is OK or ”Fail” if there is a problem.
4. The remote control should be placed in the same room as the wood-burning stove, and in a location where it is not exposed to direct heat radiation from the stove. The reason is that the remote
control functions as a thermometer. The room temperature is transmitted wirelessly to the stove’s
electronic control to support the intelligent regulation of the combustion. The remote control stand
can be mounted on the wall.
Cover plate (Drawing D)
Your HWAM woodburning stove is supplied with a loose cover plate for the shaking grate. This is a 3
mm thick iron plate. It is placed on top of the shaking grate and prevents the embers from falling into
the ash pan. The cover plate is raised approx. 8 mm above the grate, thus ensuring that the automatically
controlled primary combustion air is distributed evenly at the base of the combustion chamber.
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. 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.
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 20%. 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 and 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
A water content of a maximum of 20% is achieved by storing the wood for a minimum of one year,
preferably two years, outdoors under a lean-to. Wood stored indoors has a tendency to become too
dry and combust too quickly. However, it might be advantageous to store fuel for lighting a fire indoors
for a few 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)
Chopped wood
Special lighting guide for wood-burning stoves with soapstone cladding
Soapstone is a natural product, which needs to get used to the changes in temperature. For this reason
you should be very careful the first times you light up the stove. It is recommended that you follow the
procedure outlined below:
1.The First Stoking (Soapstone)
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. Press the remote
control twice to activate the symbol of lighting up. Light up the fire-lighters and close the stove door.
Adjust the temperature selection mechanism on the remote control to level one. 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.
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: 2.0 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
Basically, the HWAM Autopilot IHSTM will burn as slowly and as economically as possible. The slowest
combustion is achieved by adjusting the thermostat on the remote control to level one.
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%).
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 550o Celsius, 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 450o Celsius, the normal functions apply again.
We recommend using birch or beechwood, which has been split and stored for at least one year outdoors
under cover. Wood stored indoors tends to become too dry and burn too quickly.
Briquettes give off a lot of heat. Certain types expand considerably, thus causing an uncontrollable combustion.
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.
The stove is EN 13240 approved for firing wood only. No particle board, lacquered, painted
or treated wood, plastics, or rubber may be burned.
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. Use copper grease for hinges and locking hooks (see drawing F).
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 have softened.
• Checking of heat insulating material and possibly replacement.
• Checking of the bottom/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 E).
• First lift the smoke shelf (1) out of the steel rail (2) at the back of the combustion chamber. Next, lower
it beneath the holders (3) and slide it out.
• Lift each half of the steel smoke plate (4) off the holder (5) behind the smoke pipe, and remove them
from the hook (6) beneath the top plate.
The ash pan is best emptied by pulling a waste bag over the pan, tipping it and then carefully pulling it out
of 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!
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.
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 and ash pan are intact and not brittle. Failing this, they should be replaced.
Use original seals only.
The surface normally requires no treatment. Any damage to the coating may be remedied using a Senotherm spray.
The guarantee does not cover damage due to insufficient maintenance!
Maintenance Alarms
If a maintenance alarm 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 20% RH.
• Faulty seal in door. Fit new seal.
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 or ash pan. 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 Conformity
Nydamsvej 53
DK – 8362 Hørning
Test institute (EN 13240):
RRF - Rhein-Ruhr Feuerstättenprüfstelle
Am Technologiepark 1
D-45307 Essen
hereby declares that:
Wood-burning stove
HWAM 3520
HWAM 3530
was manufactured in accordance with the provisions of the following directive:
Reference no.
Construction Products – CPD
and the following harmonised standards:
EN 13240
Roomheaters fired by solid fuel
EN 13240/A2
Roomheaters fired by solid fuel
and other standards and/or technical specifications
NS 3058
Enclosed wood heaters - Smoke emission
NS 3059
Enclosed wood heaters - Smoke emission
Hørning, 26.09.2012
Torsten Hvam Sølund
Factory and quality manager
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