HWAM 3520 User manual

Users manual EN
01.11.2020 / 97-9662
www.hwam.com
3520

Table of contents
Drawings ....................................................3-5
HWAM®SmartControlTM ......................................6
Installation....................................................7
Firing manual - wood ..........................................11
Firing in general...............................................14
Maintenance .................................................15
Operational problems..........................................17
Declaration of Performance .....................................18
Product information EcoDesign ..................................19

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B. C.
A.
9
11
10
17
1
6
5
8
2a
3
15
4
16
4
3
14 12
13
2b
11
12
14
14
15
3
1
1
4
45˚
4
3
2
1
6a
6
6a
6

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D. D1.

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6
2
1
3
4
5
E.
F.

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HWAM® SMArtControl™
Congratulations on your new wood-burning stove complete with a HWAM®SmartControlTM
We are pleased that you have chosen a HWAM woodburning stove and confident that it will give you
much pleasure.
The HWAM®SmartControlTM is a digital control of the combustion in your new wood-burning stove.The
purpose of the HWAM®SmartControlTM is to control the combustion in an environmentally optimal and
economically efficient way, with a view to generating greater user comfort.
The HWAM®SmartControlTM 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 manuals for the app IHS Smart ControlTM or in the Quickguide.
.
Your new wood-burning stove and the HWAM®SmartControlTM will ensure the cleanest possible com-
bustion 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®SmartControlTM consists of the following components:
• Air box: the Air box contains a printed circuit board/software, as well as three motors and dampers
that control primary, secondary, and tertiary combustion air.The fresh air system can be mounted
on the Air box to the back 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
HWAM®SmartControlTM 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 4-5 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 manuals for the app IHS Smart ControlTM or in the Quickguide.

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InStAllAtIon
In general
To ensure optimum operation and safety, we recommend that the installation should be carried out by an
authorised HWAM retailer or a fitter recommended by the retailer.For an overview of HWAM retailers,
visit www.hwam.com under “Retailer locations”.
Safety
The installation of your HWAM woodburning stove must always comply with all European, national and
local building regulations.The installation must be carried out in accordance with the instructions in the
installation and user manuals and subsequently registered with the local authorities. Upon installation,
the chimney sweep must approve the installation before you can start using the woodburning stove.All
HWAM woodburning stove packaging material must be handled in accordance with local waste manage-
ment regulations.
Room requirements
Always ensure a supply of fresh combustion air to the room where the stove is to be installed. The
woodburning stove uses approx. 4-15 m3 of air per hour.A window that can be opened or an adjustable
air valve will be sufficient. It must not be possible to block the adjustable air valve/grate. In newly built/
airtight dwellings, we recommend that a fresh air system should be installed for the direct supply of
external air to the combustion.This fresh-air system may be bought separately.
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. Remember to consider that the stove must be connected to power.
Technical measures and data
Test results from nominal test EN 13240
Nominal heating effect 4,5 kW
Flue gas temperature EN 13240 measurement point 238ºC
Flue gas temperature measured in the outlet socket 307ºC
Exhaust gas flow 3,66 g/s
Efficiency 83,4 %
Annual efficiency (EcoDesign) 73,4 %
PM 20 mg/m3
OGC 51 mg/m3
NOx 108 mg/m3
CO at 13% O21000 mg/m3
CO at 13% O20,08 %
Energy efficiency index 111
Energy efficiency class A+
Test result based on NS 3058
Particle emissions 2,45 g/kg
The declaration of performance (DoP) can be downloaded from our website, www.hwam.com.

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Model Weight Height Width Depth
HWAM 3520c/3520m 118/115 kg 126,0 cm 54,0 cm 37,1 cm
HWAM 3520c/3520m, natural stone cladding 155/152 kg 127,0 cm 54,0 cm 37,1 cm
HWAM 3520c/3520m, soapstone cladding 167/164 kg 127,0 cm 54,0 cm 37,1 cm
Heat storage stones, HWAM 3520 44 kg
Floor plate
European, national and local regulations must be observed in terms of the size and thickness of a non-
combustible floor covering the floor in front of the combustion chamber opening. Ask your HWAM
retailer for assistance.The combustion chamber opening is 34.0 cm wide.
Distance to combustible materials
Min. distances - uninsulated flue gas pipe (drawing A) HWAM 3520
1. Recommended for brick wall 10 cm
1. For combustible back wall 10 cm
2. For combustible side wall 20 cm
1.To combustible wall,corner installation, 45º 13 cm
3. Distance to furnishings in front 80 cm
Remember to pay attention to the applicable 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®SmartControlTM..
Please be aware that not all glass parts are heat-resistant. For this reason, a glass wall should sometimes
be treated as a combustible 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 height of the chimney must ensure sufficient draught and prevent any smoke nuisance.As a general
rule, satisfactory draught conditions are achieved if the chimney is 4 m above the stove and at least 80
cm above the ridge. If the chimney is placed at side walls, the top of the chimney should always be higher
than the ridge or the tallest point of the roof.Always be aware of any national and/or local regulations
applying to thatched roofs and the location of the chimneys.
The stove requires a minimum draught of 12 Pa (measured at EN 13240 measurement point).If measured
just above the smoke flue socket, the chimney draught must be 18-20 Pa.
The chimney must have a minimum clearing of Ø 150 mm. The chimney must be provided with an
easily accessible cleaning door.The chimney and flue duct must be of flue class T400 and be CE marked.
Furthermore, it must have obtained the classification of G in soot fire testing.The required distance to
combustible material must be complied with in accordance with the brand label.Ask your HWAM retailer
for further information.
Changing the smoke outlet from top outlet to back outlet - HWAM 3520 (drawing D)
For stoves suitable for stone cladding (without stone cladding installed), begin with item 3 and end after
item 16.
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 (1).Remove the four screws (Torx Bit no. 30 or M6 nut) beneath the top plate,
two on each side, and lift the top plate off.

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3. Remove the front of the heat storage compartment (8). Loosen the two screws (9) on each side of
the front of the heat storage compartment without removing them. Then pull the front forward.
4. Removing the heat shield (7).Uninstall the heat shield on the outside of the rear plate by removing the
three screws.The heat shield has a cut-out for the flue duct. Break off the pre-cut plate; the resulting
hole fits the flue duct.
5. Removing the rear plate (2). 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 within this cut-out to make a hole in the rear plate so there is room for the
smoke outlet.
6. Removing the cover plate (3). Remove the cover plate on the back of the stove by removing the three
screws (Torx Bit no. 30).
7. Open the metallic tabs (5) and take the wires out.
8. Pull the lambda sensor coupling (10) free of the wire fastener (11).
9. Remove the temperature monitor from the smoke ring.
10.Remove the flue ring (4) and fasten it to the rear of the stove. NB: Remember to turn the lambda
probe (6) as illustrated in drawing D1.
11.Reattach the temperature monitor in the smoke ring, leading the sensor about 3 cm into the smoke
ring.
12.Reposition the lambda sensor coupling (10) in the wire fastener (11).
13.Fix the two wires by closing the metallic tabs (5) again.
14.Installing the rear plate (2). Place the rear plate on the guide pins at the back of the bottom plate of
the stove; then press it in towards the stove. Lift the rear plate and press it lightly inwards until it
engages with the guide pins.
15.Installing a heat shield (7). Replace the heat shield at the back of the stove.
16.Installing the front on the heat storage compartment (8).Place the front on the heat storage compart-
ment and fasten with the four screws (9).
17.Installing the top plate of the stove (1). Place the top plate on the fittings and secure it with the four
screws, two on each side.
18.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 con-
nected at the rear of the stove.
Connection to chimney
All the stoves have both back and top smoke outlet that can be connected to an approved steel chimney on
top or directly out at the back 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 outlet
C: Back 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.

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• 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. Check that all insula-
tion plates of the combustion chamber have been properly placed, i.e. that the bottom plate is horizontal
and that the side plates are vertical and reach all the way up to the steel sides of the combustion chamber
and down to the bottom plate.
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.
• Removable rear plate (2a).This must always be mounted if the stove is placed next to a combustible
wall.
• Removable heat shield (2b) - HWAM 3520.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
emptying.This must always be mounted when the stove is burning
Connection of the HWAM®SmartControlTM
Before using the stove it must be connected to power. See the instructions in the separate manuals for
the app IHS SmartControlTM or in the Quickguide in order to connect to stove with the app and the
wireless room temperature sensor.
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. This vacuum removes the smoke from the
stove, sucks air through the dampers in the Air box for the so-called glass pane rinse which keeps the
glass free of soot, and for the combustion.
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.
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®SmartControlTM will enter a security mode and
automatically adjust all dampers in the Air box, effectively quenching the fire. Do not open the door for
the burning chamber, 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.