Aritherm VEDO Installation and operating instructions

INSTALLATION, OPERATION AND
MAINTENANCE
• Ariterm Vedo

2
CONTENTS
General .....................................................................................3
Installation ............................................................................4-5
Laddomat 21 Connection diagram ........................................6
Temperature control valve .......................................................7
About burning wood ...............................................................8
Operation............................................................................9-11
Service and maintenance ................................................ 12-15
Measurements and connections .......................................... 16
Technical data........................................................................ 17
Guarantee .............................................................................. 17
Declaration of conformation ............................................... 18
Notes ................................................................................ 19-23

GENERAL
Ariterm Vedo is an efficient, modern wood-fired boiler, which can also be equipped with a pellet
or oil burner. It complies with the newest pollution and efficiency requirements laid down in
D8. e boiler also meets the safety requirements laid down in EN 303-5.
Due to the boiler’s excellent burning properties and good insulation, it is highly efficient and has
low environmental emissions. Carefully designed convection channels store the heat efficiently.
Vedo should be connected to a warm water accumulator.
In proportion to its efficiency, Vedo is small and therefore easy to fit in available spaces. e boi-
ler room is not required to have the highest fire safety classification; EI 30 is sufficient. To make
optimal use of the boiler’s properties, it is important to follow the instructions provided in this
manual.
e firewood used in Vedo should be at most 0.5 m long. Vedo is a reverse combustion boiler in
which wood is combusted in a firebox lined inside a water jacket upon a ceramic grate. e fuel
gasifies on the ceramic grate. e gas compounds burn at a high temperature in the bottom part
of the boiler, in a afterburning chamber which is made of fireproof material. e boiler does not
have its own water tank, as it must be connected to a warm water accumulator to operate pro-
perly. Instead, the boiler has a cooling spiral, on which a temperataure control valve is installed
to prevent overheating. It also has an exhaust fan that enables even combustion, and there is no
height requirement for the chimney.
TRANSPORTATION, STORAGE AND OPENING THE PACKAGE
Receiving the goods
e boiler is delivered in a wooden frame. On the bottom is a pallet, which can be used to lift
the boiler safely. It is advisable to open the package as close as possible to the installation locati-
on. e factory insures the boiler against transport damage, which includes transport from the
factory to the first intermediate storage point. It is important that whoever receives the boiler
should check its condition before accepting it. In cases of damage, the seller must be contacted
immediately.
Storage
e boiler can be stored in the open air if protected from rain, but storage indoors is recom-
mended.
Opening the package
After opening the package, open up all the hatches and check the equipment to see that all loo-
se equipment has been supplied. Disposal of packaging: plastic cover can be recycled, wooden
planks can be burned.

4
INSTALLATION
Installation of the boiler can only be done by a company or individual with the necessary profes-
sional accreditations. Installation should be performed so that it meets the minimum require-
ments of the SFS 3332 standard. Electrical and burner installations must be done only by a
qualified company or individual.
Space requirements
An area of 1 metre must be reserved in front of the boiler for cleaning and maintenance pro-
cedures. Plumbing connections are located on top of the boiler with the exception of the return
from the accumulator, which is on the side.
Flue connection and combustion air opening
e boiler can be directly connected to a vertical flue. e seams can be sealed with 350 °C
silicon paste. If the flue is made of bricks, use the supplied square elbow to connect the boiler.
Flue requirements: Minimum Ø 140 mm, and for a masonry flue, free cross-sectional area of at
least 200 cm². If an oil burner is used as well, the flue requirement is a brick flue lined with acid-
proof thin-walled pipe tube or an acid-proof flue element. e free surface area of the combus-
tion air opening must be 1.5 times the diameter of the flue. e combustion air opening must
never be covered.
Flue gas fan
e Vedo has versatile assembly options that allow it to be fitted with different chimney so-
lutions. e standard delivery always includes a flue gas fan. e standard connection to the
chimney is straight up (image 1). Make sure to leave enough space for cleaning when installing
the pipe. A chimney elbow piece also comes as a standard accessory. It allows the boiler to be
connected to a brick chimney (image 2).
Pic 1
Pic 2

5
Plumbing connections
Before installation of the boiler, the heating system must be flushed and a water pressure test
carried out. e tightness of connections must be ensured after installation. e factory is not
responsible for damage caused by leaking connections.
Relief valve installation
e pressure relief valve must be CE-approved with a maximum opening pressure of 1.5 bar
and a minimum size of DN 15. It must correspond to the highest pressure class of the equip-
ment assembly. Between the valve and the boiler, no equipment may be installed, the connection
of which could be closed. e exhaust pipe must be dimensioned and installed so that it neither
restricts the exhaust efficiency of the relief valve, nor causes a hazardous situation when the val-
ve is working.
e capacity of the expansion vessel must correspond to the greatest possible fluid volume chan-
ge in the boiler system. In periodic heating, the expansion capacity must be approximately 10%
of the system volume. We recommend that only a closed system is used (membrane expansion
vessel).
Filling the system
Before heat is turned on, the storage tank and heating system must be filled with water.
Instructions for lling
• Open all shutter valves, including the four-way mixing valve.
• e pump must be switched off. Fill in the heating system.
• Remove air through the accumulator and radiators.
• When the system is filled, you can switch on the circulation pump and start heating.
• When the water in the boiler has reached the set operating temperature, switch off the
pump and remove air from radiators again. is has to be repeated a few times.
Since there is a lot of air in the water at the start (up to 10%), it is normal for the pressure to
drop as air leaves the system. erefore it may be necessary to add water on several occasions
when operating the boiler. e temperature of water returning to the boiler should be around
70°C, which is achieved through a by-pass connection illustrated in the connection diagram.
A sufficiently high boiler temperature throughout the operation keeps the convection surfaces
clean and achieves highly efficient combustion. is also enables a long service life for the boiler,
since no corroding acids will form on the fire surfaces.
INSTALLATION

6
CONNECTION DIAGRAM
A T-pipe with a min.
diameter of 1 ¼”
improves ventilation
Flue thermostat
Relief valve
Boiler
Hot water
Cold water
Mixer valve
Exp.
vessel
Automatic
shunt
Electric resistor
Warm water
accumulator
Tank
Room temperature sensor
Radiator temperature sensor
Filling
Radiator
Radiator pump
Shunt valve
Connection to boiler top
Ball check valve 1 ¼” IG
Internal thermal valve
Internal pump Wilo RS 25-6/3
Thermometer
Connection to accumulator
tank bottom
Automatic cycle valve
in case of power cut
Easy-to-clean dirt pocket to
prevent operating errors
Connection to boiler bottom
Thermometer
Filling connection R15
Ball check valve 1 ¼” IG
Thermometer
Ball check valve 1 ¼” IG

7
TEMPERATURE CONTROL VALVE
e Ariterm Vedo boiler must be installed in connection with a warm water accumulator. is
improves its functionality and extends its life span substantially.
By installing the boiler as presented here, it is possible to make the boiler temperature rise
quickly and to maintain a steady, high temperature when the boiler is being used. e fact that
water is layered in the accumulator ensures a quick supply of warm water soon after heating
starts. e heating circuit and household water circuit are connected to the accumulator.
Installing a temperature control valve to wood-red boiler with a cooling spi-
ral
e Pressure Equipment Directive requires that manually-filled wood-fired boilers must be
equipped with a safety device, which prevents the boiler from overheating. We recommend the
SYR 3065 temperature control valve for this boiler. is does not, however, replace other safety
devices, such as a pressure relief valve.
Installation
e temperature control valve is connected to the cooling spiral so that, when the valve is activa-
ted, it sends hot water down the drain. e temperature sensor is installed on the sleeve on the
upper part of the boiler, using a DN 15 x 150 well.
TECHNICAL DATA
Max pressure of incoming water 10 bar
Opening temperature 97° C
Temperature control valves are available from Ariterm Product Number 5012921

8
ABOUT BURNING WOOD
Before starting the boiler, check the following:
• Heating network and boiler are filled with water, pressure at least 0.5 bar
• If there is a smoke pipe damper, make sure that it is open
• e heat supply pump is switched on
• e accumulator or network valves are open
• e combustion air outlet is open
• e relief valve is in unhindered contact with the boiler and is in working order.
Firewood
Fresh firewood contains 80–90% water during the growing season and 70% in winter. Wood
must be allowed to dry before it can be combusted. It is best to fell the trees in winter when
their wood contains less water. It is important to cut firewood to the appropriate length for the
boiler’s combustion chamber. Good firewood should contain no more than 15-25% water. Raw
wood must be cut and split to a suitable size to allow it to dry well and fit in the firebox. If the
wood is from a small tree and not split, strips of bark should be removed lengthways. Large,
damp pieces of wood burn poorly and carbonise slowly. is causes a lot of tar and soot to form
in the boiler and burns inefficiently. You can check the water content of wood by weighing it.
Cut a test piece from freshly-cut wood. It is fit for combustion when its weight has decreased by
about 60%. If the fresh piece of wood weighs 1,000 g, it is fit for combustion when it weighs 400
g.
Burning
Wood is an organic material. Its combustible constituents are carbon and hydrogen. When
wood heats up, these constituents are released and gasify. If the burning process is efficient (with
sufficient primary and secondary air available), the combustion temperature rises sufficiently
high to cause clean burning. Wood also contains some minerals, which result in impurities. In
order to achieve good burning performance and energy production and as few polluting and
sooty emissions as possible, bear the following in mind: Dry firewood. e water must evapo-
rate before the wood is fit for combustion. If the water content is too high, the combustion is
incomplete.
A sufficient supply of air and a sufficiently high temperature in the combustion chamber are
needed. Appropriate air flow is important. If the wood is damp, a lot of heat goes to waste.
Damp weather, a cold chimney pipe and insufficient cross-sectional flue surface area have a ne-
gative impact on the draft. A good supply of oxygen is required in the ignition stage to achieve a
good layer of charcoal and efficient combustion.

9
OPERATION
The use of wood in the Ariterm Vedo
Ariterm Vedo is designed for the combustion of solid fuels in densely populated neighbour-
hoods. It has been tested and approved in accordance with the latest wood-fired boiler requi-
rements. e approval requires both ceramic grates and transfer of heat into an accumulator.
Ariterm Vedo is a reverse combustion boiler in which combustion occurs downwards through
the ceramic grate.

10
OPERATION
Starting the re:
• Open the smoke pipe damper. Adjust primary air vent to 4 and secondary air vent to 5 (on
1 to 7 scale).
• Start up the exhaust fan.
• Open the feeding hatch, which causes the fire door damper to open automatically.
• Stack with small firewood, enough to cover the bottom of the chamber.
• Apply kindling on top of the wood. Start a fire.
• Close the feeding hatch.
• When the fire is properly burning and a layer of charcoal has formed, fill the firebox up no
higher than to the top of the air vents.
• After the fire is going well, adjust the secondary air vent approximately to position 2. Flue
gas temperature should be 150…180°C
Adjust primary air vent
to 4.
Adjust sekundary air
vent to 5.

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Adding rewood
Do not add firewood until after the first load has burnt down to a small amount of charcoal.
Open the feeding hatch slowly to avoid a cloud of smoke caused by the carbon monoxide that
may remain in the firebox. Add firewood. e amount of firewood should not be excessive so
that the accumulator can capture all the thermal energy released from the wood. e maximum
load of wood is to the top of the air vents.
Pellet use
Ariterm Vedo is compatible with an KMP PX21 pellet burner. Replace the stoking hatch with
a hatch with an PX21 pellet stoker. If you use a pellet burner, remove the ceramic grates and se-
condary combustion chamber and close primary and secondary air vents. Specified instructions
on the installation and use of the pellet burner come with the burner.
Oil use
Ariterm Vedo is also compatible with using oil as fuel. e oil burner is installed on the pellet
burner hatch using an oil burner flange, which is available as an accessory.
Electric use
e boiler is not compatible with electric use. If electric resistors are required, they should be
installed on the accumulator.
OPERATION

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SERVICE AND MAINTENANCE
Also check and, if necessary, clean the blades
of the flue gas fan. Remove ash from the
secondary combustion chamber through the
ash box door.
Open the convector cleaning door.
Before each heating season Once a week and as required in
the heating season
Check that the holes of the grate are unblocked
and that there is no combustion residue left
from previous use. Always clean the convector after the flue gas
temperature has risen by 30°C from clean
boiler value, or the draft has weakened.
e boiler will function properly and have a long service life when the following matters are ta-
ken care of:
• e boiler should be located in a dry space.
• e boiler should always be operated within the recommended limits.
• e boiler should be cleaned up when the flue gas temperature has risen 20–30°C above
that of a clean boiler.
• If any part is damaged, it must be replaced with a new one as early as possible.
• Check that condensation water or water from pipe leaks cannot damage the boiler.

13
SERVICE AND MAINTENANCE
Make sure that the fire door damper
opens and closes as you use the
feeding hatch.
Make sure that the fire door damper
closes when you close the feeding
hatch.
Remove all turbulators. Clean the boiler convector by brushing
the convector pipes clean.

14
From time to time, you should check that the
gap between the deflectors and the storage
chamber is unblocked. Lift the deflectors from
their supports to clean them. Also clean the
walls of the storage chamber.
Other maintenance procedures Adjustment of the hatches
Check that the hatch sits tightly. A leaky fee-
ding hatch will cause wood to combust in the
wrong place. Tighten the hatches by adjusting
the lock handle and hinge pieces.
The tightness of the hatches is important for
the proper functioning of the boiler.
Adjusting the lock handle:
• Unscrew the screw of the lock handle
enough to be able to turn the eccentric
sleeve in the hole.
• Turn the sleeve to make the handle move
away from the boiler. Tighten the screw
slightly.
• Test whether the hatch now sits more
tightly on the handle side.
SERVICE AND MAINTENANCE

15
• Unscrew both mounting screws of the
hinge piece enough to move the hinge.
• Move the hinge piece slightly in the direc-
tion of the boiler.
• Tighten the mounting screws slightly and
test whether the hatch now sits more
tightly on the hinge side.
• Once the hatch is sitting properly, tighten
all the screws. If the adjustment tolerance
on the hatch runs out, its seal will have to
be replaced.
Adjusting the hinge:
SERVICE AND MAINTENANCE

16
Part Name Unit
1Feeding hatch
2Stoking hatch
3Primary air vent
4Secondary air vent
5Convector door
6Top door
7Bottom door
8Outlet to accumulator DN 32
9Expansion vessel outlet DN 25
10 Cooling spiral Cu 15
11 Return from accumulator DN 32
12 Draining outlet DN 15
13 Water thermometer / pressure gauge
14 Flue connection
15 Flue gas fan
16 Control valve DN 15
17 Horizontal flue pipe
18 Burnet thermostat / sensor assembly DN 15
MEASUREMENTS AND CONNECTIONS

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TECHNICAL DATA
TECHNICAL DATA
Capacity
With wood
With pellets
With oil
30 kW
30 kW
30 kW
Dimensions
Width
Depth
Height
Weight (empty)
Water capacity
Flue connection
570 mm
1016 mm
1345 mm
415 kg
125 L
diameter 140 mm (external)
Design values
Boiler pressure
Permitted boiler temperature
Size of warm water accumulator
Maximum length of firewood
0,5-1,5 bar
Max 20-120 °C
1100 – 2500 L
0,5 m
Guarantee
For Warranty Issues Ariterm Sweden AB refers to our local Distributor.
Removal from use
A boiler that has reached the end of its useful life can be used for scrap.

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MANUFACTURES DECLARATION

19
NOTES

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NOTES