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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 

• 

The heat supply pump is switched on 

• 

The accumulator or network valves are open 

• 

The combustion air outlet is open 

• 

The 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. This 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. The 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.

Summary of Contents for VEDO

Page 1: ...INSTALLATION OPERATION AND MAINTENANCE Ariterm Vedo ...

Page 2: ...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 ...

Page 3: ...f the boiler in a afterburning chamber which is made of fireproof material The 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...

Page 4: ...on 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 cm 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 The free surface area of the combus tion air opening must be 1...

Page 5: ...stem 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 filling Open all shutter valves including the four way mixing valve The 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...

Page 6: ...sor Radiator temperature sensor Filling Radiator Radiator pump Shunt valve Connection to boiler top Ball check valve 1 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...

Page 7: ...ontrol valve to wood fired boiler with a cooling spi ral The 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 This does not however replace other safety devices such as a pressure relief valve Installation The temperature ...

Page 8: ...ater 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 proc...

Page 9: ...sely populated neighbour hoods It has been tested and approved in accordance with the latest wood fired boiler requi rements The 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 ...

Page 10: ...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 prima...

Page 11: ...mpatible 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 The oil b...

Page 12: ... the convector after the flue gas temperature has risen by 30 C from clean boiler value or the draft has weakened The boiler will function properly and have a long service life when the following matters are ta ken care of The boiler should be located in a dry space The boiler should always be operated within the recommended limits The boiler should be cleaned up when the flue gas temperature has ...

Page 13: ...e 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 ...

Page 14: ...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...

Page 15: ...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 ...

Page 16: ...8 Outlet to accumulator DN 32 9 Expansion 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 ...

Page 17: ...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 ...

Page 18: ...18 MANUFACTURES DECLARATION ...

Page 19: ...19 NOTES ...

Page 20: ...20 NOTES ...

Page 21: ...21 NOTES ...

Page 22: ...NOTES ...

Page 23: ...23 NOTES ...

Page 24: ...05 05 2011 All Rights to modifications and corrections reserved ARITERM SWEDEN AB Flottiljvägen 15 39241 Kalmar www ariterm se 0771 442850 ...

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