HWAM 4520 User manual

User's Manual EN
05.09.2017 / 97-9688
www.hwam.com
4530 4550 4560
4540
45204510

Table of contents, English
Drawings ........................................................4-8
HWAM Autopilot IHSTM ............................................9
For UK - The Clean Air Act 1993 and Smoke Control Areas .............10
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Firing manual - wood ..............................................16
Firing in general ...................................................19
Maintenance......................................................20
Operational problems .............................................21
Declaration of Performance.........................................21

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A1)
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A2)
B.
A.

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C.
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6
7
8
9
11
12
10
C1) C2)
4
6
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7
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910
E.

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F.

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F.

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F.

9
HWAM Autopilot iHS™
Congratulations on your new wood-burning stove complete with a HWAM Autopilot 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 efcient 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 re 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 HWAM Autopilot IHSTM will ensure the cleanest possible combus-
tion as well as a good fuel economy, regardless of external conditions such as the type of rewood 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 the Air
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 tia r y
air
Oxygen sensor
Temperature sensor

10
For uK - tHE ClEAn Air ACt 1993 And SMoKE Control ArEAS
Under the Clean Air Act local authorities may declare the whole or part of the district of the authority
to be a smoke control area. It is an offence to emit smoke from a chimney of a building, from a furnace
or from any xed boiler if located in a designated smoke control area. It is also an offence to acquire
an ”unauthorised fuel” for use within a smoke control area unless it is used in an ”exempt” appliance
(”exempted” from the controls which generally apply in the smoke control area).
In England appliances are exempted by publication on a list by the Secretary of State in accordance with
changes made to sections 20 and 21 of the Clean Air Act 1993 by section 15 of the Deregulation Act
2015. Similarly in Scotland appliances are exempted by publication on a list by Scottish Ministers under
section 50 of the Regulatory Reform (Scotland) Act 2014. In Northern Ireland appliances are exempted
by publication on a list by the Department of Agriculture, Environment and Rural Affairs under Section
16 of the Environmental Better Regulation Act (Northern Ireland) 2016. In Wales these are authorised
by regulations made by Welsh Ministers.
Further information on the requirements of the Clean Air Act can be found here: https://www.gov.uk/
smoke-control-area-rules.Your local authority is responsible for implementing the Clean Air Act 1993
including designation and supervision of smoke control areas and you can contact them for details of
Clean Air Act requirements.
The HWAM 4500 IHS stoves detailed below have been recommended as suitable for use in smoke control
areas when burning wood logs.
Appliances recommended as suitable for use in Smoke Control Areas :
• HWAM 4510c/4510m IHS
• HWAM 4520c/4520m IHS
• HWAM 4530c/4530m IHS
• HWAM 4540c/4540m IHS, HWAM 4540c/4540m IHS with soapstone, HWAM 4540c/4540m IHS
with sandstone
• HWAM 4550c/4550m IHS
• HWAM 4560c/4560m IHS, HWAM 4560c/4560m IHS with soapstone, HWAM 4560c/4560m IHS
with sandstone
Refuelling on to a low re bed
If there is insufcient burning material in the rebed to light a new fuel charge, excessive smoke emission
can occur. Refuelling must be carried out onto a sufcient quantity of glowing embers and ash that the
new fuel charge will ignite in a reasonable period. If there are too few embers in the re bed, add suitable
kindling to prevent excessive smoke.
Fuel overloading
The maximum amount of fuel specied in this manual should not be exceeded, overloading can cause
excess smoke.
Operation with door left open
Operation with the door open can cause excess smoke.The appliance must not be operated with the
appliance door left open except as directed in the instructions.

11
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 qualied 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. 9-20 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 sufcient, 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 oor 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 4510c/4510m 99/97 kg 75,5 cm 50,0 cm 40,6 cm
HWAM 4510c/4510m with low plinth 105/103 kg 93,0 cm 50,0 cm 40,6 cm
HWAM 4510c/4510m with high plinth 109/107 kg 104,0 cm 50,0 cm 40,6 cm
HWAM 4520c/4520m 94/92 kg 75,5 cm 50,0 cm 40,6 cm
HWAM 4520c/4520m with low plinth 100/98 kg 93,0 cm 50,0 cm 40,6 cm
HWAM 4520c/4520m with high plinth 104/102 kg 104,0 cm 50,0 cm 40,6 cm
HWAM 4530c/4530m 124/122 kg 114,3 cm 50,0 cm 40,6 cm
HWAM 4540c/4540m 119/117 kg 114,3 cm 50,0 cm 40,6 cm
HWAM 4540c/4540m with soapstone 175/173 kg 114,3 cm 50,0 cm 40,6 cm
HWAM 4540c/4540m with sandstone 136/134 kg 114,3 cm 50,0 cm 40,6 cm
HWAM 4550c/4550m 134/132 kg 138,8 cm 50,0 cm 40,6 cm
HWAM 4560c/4560m 129/127 kg 138,8 cm 50,0 cm 40,6 cm
HWAM 4560c/4560m with soapstone 201/199 kg 138,8 cm 50,0 cm 40,6 cm
HWAM 4560c/4560m with sandstone 156/154 kg 138,8 cm 50,0 cm 40,6 cm
Heat storage stones HWAM 4550/4560 Approx. 29 kg
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 result based on EN 13240
Nominal heating effect 4.9 kW
Flue gas temperature EN 13240 measurement point 270ºC
Flue gas temperature measured in the outlet socket 324ºC
Exhaust gas ow 4.0 g/s
Efciency 81%
Test result based on NS 3058
Particle emissions 3.29 g/kg

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Distance to inammable materials
Your HWAM stove must always be installed on a non-combustible foundation. If it is set up on a wooden
oor or another combustible material, the oor must always be covered with non-combustible material,
e.g. a oor plate.The width and depth (distance in front of the stove) of the non-combustible material are
determined according to relevant national and local building regulations. If there is risk of embers falling
under the stove, the non-combustible material must also cover the oor under the entire bottom plate
of the stove as well as the area next to the stove in accordance with national rules.The non-ammable
material must be of a size that is sufcient to prevent embers from falling out on the combustible oor.
Min. distances - uninsulated ue gas pipe:
(drawing A)
With steel cladding With stone
cladding
HWAM 4510
HWAM 4530
HWAM 4550
HWAM 4520
HWAM 4540
HWAM 4560
HWAM 4540
HWAM 4560
1. Recommended for brick wall, back, cm 10 10 10
2. Recommended for brick wall, side, cm 30 10 10
1. For inammable wall, back, cm 10 10 10
2. For inammable wall, side, cm 59 35 40
1.To inammable wall, corner installation, cm 33 7 7
3. Distance to furnishings in front, cm 120 110 110
IMPORTANT FOR UK (for all other countries please see separate text below)
• In case of wall installation, HWAM 4510/4520 must be suspended at least 17.5 cm above
an inammable oor (measured from the bottom plate of the stove).The above require-
ment applies even if the oor is tted with a oor plate.
• The variant HWAM 4510/4520 without a plinth must be installed on a BS non combustible/
constructional hearth.The non combustible/constructional hearth must extend 425 mm
in front of the appliance. It is still considered a combustible oor even if an ember catch-
ing, non-combustible oor plate is placed on top of the combustible oor. Floor in front
exceed 100°C demand closer than 425 mm in front of the stove installed without a plinth.
• Floor directly beneath the stove installed without a plinth does exceed 100°C.
Take note of the applicable regulations for the distance between the wall and ue pipe.
The distance to a brick wall is set to faciliate the servicing of the HWAM Autopilot IHSTM.
Please be aware that not all glass parts are heat-resistant. For this reason, a glass wall should sometimes
be treated as a ammable 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.
IMPORTANT FOR ALL COUNTRIES BUT UK (for UK please see separate text above)
• In case of wall installation, HWAM 4510/4520 must be suspended at least 28.5 cm above
an inammable oor (measured from the bottom plate of the stove).The above require-
ment applies even if the oor is tted with a oor plate.
• HWAM 4510/4520 without a plinth and HWAM 4510/4520 with a low plinth must not be
mounted on combustible oors.It is still considered a combustible oor even if an ember
catching, non-combustible oor plate is placed on top of the combustible oor.
• A non-combustible structure under HWAM 4510/4520 without a plinth and HWAM
4510/4520 with a low plinth must extend at least 480 mm in front of the stove.
Take note of the applicable regulations for the distance between the wall and ue pipe.
The distance to a brick wall is set to faciliate the servicing of the HWAM Autopilot IHSTM.

13
Please be aware that not all glass parts are heat-resistant. For this reason, a glass wall should sometimes
be treated as a ammable 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 sufcient 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 connec-
tion. Ask your HWAM dealer for more information.
Changing the smoke outlet from top outlet to rear outlet - HWAM 4510/4520/4530/4540
(Drawing F)
1. Lift the top plate (2) off the stove.
2. Remove the rear plate (3) by loosening the two screws (4).The rear plate has a cut-out for the ue
pipe. Cut out the plate (5) within this cut-out.
3. The heat shield has a cut-out for the ue pipe. Cut out the plate (6) within this cut-out.
4. Remove the cover plate (7) on the rear of the stove (behind the cut-out plate in the heat shield) by
removing the three screws (8).
5. Remove the smoke ring (9) above the combustion chamber by removing the three screws (10).
6. Place the smoke ring (9) in front of the ue outlet hole on the rear of the stove and afx using the
three screws (10).
7. Place the cover plate (7) so that it closes the ue outlet on top of the combustion chamber (where
the smoke ring was just removed) and afx using the three screws (8).
8. Place the rear plate (3) on the guide taps (11) on the rear side of the stove's base plate and afx the
rear plate using the two top screws (4).
9. Lie the top plate (2) on the stove.
10. Place the cast-iron or stone top cover (12) in the hole in the top plate.
Changing the smoke outlet from top outlet to rear outlet - HWAM 4550/4560 (Drawing F)
1. Remove the heat storage compartment front (1) by lifting the front and pulling away from the stove.
2. Lift the top plate (2) off the stove.
3. Remove the rear plate (3) by loosening the two screws (4).The rear plate has a cut-out for the ue
pipe. Cut out the plate (5) within this cut-out.
4. The heat shield has a cut-out for the ue pipe. Cut out the plate (6) within this cut-out.
5. Remove the cover plate (7) on the rear of the stove (behind the cut-out plate in the heat shield) by
removing the three screws (8).
6. Open the metallic tabs (13) and take the wires out.
7. Disassemble the lambda sensor coupling (14a+14b) and pull its upper part free from the wire fastener
(15).
8. Remove the temperature monitor (16) from the smoke ring (9) and then pull it out of the hole (17)
at the rear end of the heat storage compartment.
9. Remove the smoke ring (9) above the combustion chamber by removing the three screws (10).
Remove the smoke ring (9) through the front opening of the heat storage compartment and then
pull the lambda sensor, including the topmost part of the wire, through the hole (17) at the rear end
of the heat storage compartment.
10. Place the smoke ring (9) in front of the ue outlet hole on the rear of the stove and afx using the
three screws (10).
11. Reattach the temperature monitor (16) in the smoke ring, leading the sensor about 3 cm into the
smoke ring.
12. Assemble the lambda sensor (14a+14b) and t it back into the wire fastener (15).
13. Fix the two wires by closing the metallic tabs (13) again.

14
14. Place the cover plate (7) so that it closes the ue outlet on top of the combustion chamber (where
the smoke ring was just removed) and afx using the three screws (8).
15. Place the rear plate (3) on the guide taps (11) on the rear side of the stove's base plate and afx the
rear plate using the two top screws (4).
16. Lie the top plate (2) on the stove.
17. Place the cast-iron or stone top cover (12) in the hole in the top plate.
18. Re-attach the front (1) to the heat storage compartment.
Fitting the loose parts
Before the stove is installed, you must ensure that all loose parts are tted 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 horizontal smoke pipes will reduce the effect of the chimney draft.
Vertical cross-section of the stoves (Drawing B)
1. Bottom smoke shelf. Must rest on the steel rail at the back of the combustion chamber.
2. Top smoke shelf. Must rest on the bottom smoke shelf.
3. The steel smoke guide plate is in two parts. Each half hangs on a hook under the top plate and is
equipped with two pins (7) that serve as protection during transportation. Remember to remove
the two pins before you start using the stove.
4. Rear ue outlet. Closed at the factory using a plate afxed with screws.The ue outlet is thus concealed
behind the rear plate.
5. Removable rear plate. Must always be installed if the stove is next to a ammable wall.
6. Loose heat shield under the ash pan.
Adjustment feet
The stove comes with four adjustment feet. Mount and adjust the adjustable feet screws in accordance
with the separate instructions, 2 in each side, to the desired height.
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 rst 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.
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.

15
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 ue (Drawing C)
C1: Top smoke outlet
C2: Rear smoke outlet
1. Steel chimney.
2. Flue gas elbow. Fits into smoke ue socket.
3. Brick-built jamb of ue.
4. Built-in pipe sleeve. Fits smoke ue.
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.
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 ush 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 insufcient 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 ames going. Split the wood into extra ne pieces, use an extra relighter, 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 rst
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 res,the chimney must be cleaned every year.The ue duct and the smoke
chamber above the bafe 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 re and overheating, the HWAM Autopilot IHSTM will enter a security mode and
automatically adjust all dampers, effectively quenching the re. Do not open the stove door, since that
might cause the re to rekindle. Contact the re brigade. After a re, the stove should be checked by a
chimney sweep before use.

16
Firing MAnuAl - Wood
When you light the stove for the rst 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 re with wet wood results in soot,
environmental problems, and a less efcient fuel economy. It is recommended to purchase a hygrometer
to continuously check that the rewood has the correct moisture content before using it for ring.
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 re with the following: printed matter, plywood, plastic, rubber, uid 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 re (nely chopped) 20-31 2-5
Chopped wood 20-31 7-9
Special re 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 rst stoking
Open the door. Place two pieces of wood (5-8 cm in diameter) horizontally in the bottom of the combus-
tion compartment (corresponding to 0.9-1.15 kg). Place 6-10 pieces of kindling randomly on top. Place
2-4 relighters between the top layer of kindling. Light up the re-lighters and close the stove door. Set
the temperature level to level 1. Let the re burn out and do not restoke even if there is a restoking
alarm.When the re has died out completely, the door must be opened and stay open while the stove
cools down to room temperature.

17
2.The second stoking
Open the door. Place two pieces of wood (5-8 cm in diameter) horizontally in the bottom of the combus-
tion compartment (corresponding to 0.9-1.15 kg). Place 6-10 pieces of kindling randomly on top. Place
2-4 relighters between the top layer of kindling. Light up the re-lighters and close the stove door. Set
the temperature level to level 2.When there is a restoking alarm, you should restoke. Place 2 pieces of
new rewood (up to 1.15 kg each) with a diameter of approx. 7-9 cm in the combustion chamber. Let the
re 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
re burn and allow the stove to cool down after the re has died out.
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 re 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 (corresponding to 0.9-1.15 kg).Place
6-10 pieces of kindling randomly on top. Place 2-4 re-lighters in between the top
layers of kindling. Light up the re-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 ue gases do not reach a high enough temperature for kindling or ring, IHS Smart ControlTM and
the wireless room temperature sensor emit a stoking alarm, even if there is still unburned wood and
ames in the combustion chamber.The stoking alarm is emitted to make you aware that the re needs
more energy. Restoking with small pieces of kindling wood can often provide a more rapid and sufcient
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
ames in the wood after ring!
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 ue
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 ue
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 re

18
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 ue gas
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 ue 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 rewood may be too high or the draught in the chimney too weak.The IHS system always strives
for a sufciently high ue 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 notication that it is time for re-stoking if the app is opened. For more information on
the app, see separate manual.
The amount of woo 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 - 1800 g) (1600 - 2300 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 ames 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 re 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 ow 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.
To store heat in the heat storage stones in the heat storage compartment as quickly as possible, it is
recommended that the convection vent be kept closed while the re is lit.
With the convection vent closed, the heat storage compartment retains the heat stored in the heat stor-
age stones for the longest possible duration. If the vent is opened, the heat stored in the stones in the
heat storage compartment will be released into the room as quickly as possible.

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Firing in gEnErAl
Rapid or erce heat
Rapid or erce heat is obtained by burning many small pieces of wood.
Maximum amounts of fuel:
The maximum allowed amount of fuel per hour is:
Model Wood
HWAM 4500 2.4 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-ring interval
Typical re-ring interval at nominal performance:
Model Re-ring interval Wood
HWAM 4500 45 min. 1.1 kg
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 ue 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 re 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.
16-18%). Read more on www.hwam.com.
Cleaning the glass
We recommend wiping the glass after a re.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 ue 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.
The stove is EN 13240 approved for ring wood only. No particle board, lacquered, painted
or treated wood, plastics, or rubber may be burned.

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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 G. 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 combustion chamber base.
• Use copper grease for hinges and locking hooks (see drawing G).
All service checks must be performed by an authorised tter. Use only original spare parts.
Inside cleaning
Remove the top smoke shelf and the two-part steel smoke guide plate from the stove before cleaning
(Drawing E):
• Lift the smoke shelf (1) out of the combustion chamber.
• Unhook each half of the smoke guide plate (2) from the hook (3) under the top plate.
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 re has gone out!
Insulation
The efcient, but porous insulation of the combustion chamber may, in time, become worn and damaged.
Cracks in the insulation have no effect on the efciency 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 Senotherm spray.
Guarantee
The guarantee does not cover damage due to insufcient 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.