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BIO HEATING GUIDETHE ARIMAX PRODUCTRANGE AND BIO ENERGY INFORMATION

For over 30 years Swebo Bioenergy has delivered heating systems for houses and industries all over Europe. This have made us to be one of the leading company’s of Bioenergy solutions.

Our own developed product has many times sat an standard of Bio-energy products on the market and we put a great value of being in the front when it comes to new technique and optimized energy systems.

Swebo have one of the largest product scales in the business,everything from 20 k kW up to 4 mW.

Visit us at our website www.swebo.com and readmore about us and our services.

2

DESIGNING AND SIZING THE BIO HEATING SYSTEM

DOMESTIC, NATURAL RENEWABLE ENERGY

Domestic heating energy sources improve their share in Finnish heating every year. Th e reasons for this are simple; e.g. forest processed wood chips, wood pellet and peat are renewable, environment friendly, domestic and economical energy sources which decrease the amount of sulphur and greenhouse gas emissions into the atmosphere. In other words, they correspond to the demands of sustainable development set for heating energy sources today.

Th e modern bio heating is easy and largely automatized,

minimizing the use and upkeep eff ort needed for the heating

system. Th is development has given rise to a new type of

company, the heating enterprise, in which a local entrepreneur

sells bio energy produced heat to the customers.

As a domestic energy source, wood is a part of the Finnish

heating. In its diff erent forms, it easily fi lls the criteria for a

good energy source.

As an energy source, wood is environment friendly and

renewable and also produces practically pollution-free energy.

Th ere is more wood than can be used in the Finnish forests;

of the wood suitable for energy production, over 15 mil. m3

goes unused every year.

Wood chip is made by chipping the wood. Th e raw material

for chips can be whole tree, logging waste or other waste wood.

Th e quality of the chip is crucial to the functionality of the

machinery. Forest processed wood chip has the best properties

for energy use.

Peat is the slowest renewing of the widely used bio fuels.

It is the most economical and is best suited to fuel sizeable bio

heating plants. Peat also fi lls the previously mentioned criteria

for sustainable development.

Wood pellet is a domestic fuel with uniform quality and a

high heat value. It is produced from sawdust and cutter chips by

pressing. Th e raw material comes mainly from mechanical

wood industry enterprises. No additives are used in wood

pellet production, which makes it just as environment friendly

as wood chip.

Wood briquettes are like wood pellets in composition, but

much larger in size. Due to their larger size and higher

combustion temperature, wood briquettes are mostly suitable

for fairly large heating plants (>500 kW).

Grain in its various forms is readily available, especially on

farms. However, the burning qualities of grain are very diff erent

from those of wood fuels. Th e amount of ash is up to ten times

greater and the melting point of the ash is low. Using grain as

fuel means a signifi cantly greater need for cleaning and

maintenance. Th erefore, the suitability of grain for fuel must

always be considered on a case-by-case and system-by-system

basis.

Calculate required heat power(max. power kW)

Calculate annual

total energy requirement (kWh)

Choose fuels to be used (wood chip, pellet, peat)

Calculate manitude of annual fuel consumption (i-m3)

Choose suitable heating equipment (type, power, brand)

Determine space requirements of equipment (with manufacturer)

Determinestoring and space requirements of fuel

Th is Arimax Bio Heating Guide is intended to provide guidelines for designing and installation to customers considering and purchasing

bio heating systems.

Wood pellet Wood briquettesWood chip Peat

The designing of a new bio heating system may proceed as follows:

3

Heat Power RequirementsTh e heating requirements of a property consist of the buildings’

heat loss, ventilation and consumption of warm service water.

Th e values in the enclosed chart can be used as guidelines when

designing heating for a new/old residential building. Th e hea-

ting requirements for buildings have to be sized case-specifi cally

because of the widely varying heat losses, depending on e.g. in-

sulation, temperature used, ventilation, opening of large doors

etc. In case no technical structure data is available, the power

magnitude can be determined with the value 20 W/rm3.

During summertime, when there are several rest periods, it is

important to take care of suffi cient draft. If a suffi ciently good

draft (30 Pa) cannot be guaranteed, it is recommended that

a negative pressure controlled chimney ventilator is installed

into the equipment. In a system equipped with a ventilator,

it is possible to fi t the chimney length as best suits the

surroundings.

Warm water may momentarily require signifi cant amounts of

power. For example, one normal shower requires 30 kW of

power. Heating ducts lose very little power. In modern, well-

insulated ducts the heat loss is approx. 20 W/m. It is best to

confi rm this with the duct manufacturer.

Calculating the Required Heat Power (Max. Power)

New residential buildings 18 W/rm3

Old residential buildings 25-30 W/rm3

Example

Area of an old residential building in good condition 200 m2

Room height x 2,60 m

Building capacity = 520 m3

Heat power requirement 520x25 W 13 kW

Example 1. FARM

Residential building

Area 200 m2

Room height 2,60 m

Building capacity 200 x 2,6 = 520 m3

Required heat power 520 x 25W 13 kW

13 kW

Technical building

Area 300 m2

Inner height of hall 3 m

Building capacity 300 x 3 = 900 m3

Required heat power 900 x 22W

20 kW

Cattle house

Required extra heating during winter 25 kW

Heating ducts

Power loss approx.

(50 m of heating duct, 20 W/m) 1 kW

Domestic hot water

Two showers, power requirement 60 kW. The power requirement is momentary and thus does not need to be taken into account separately; the boiler is equipped with a suffi ciently effective service water spiral instead.

Maximum power requirement 59 kW

Example 2. TERRACED HOUSE + SCHOOL

• A terraced house of 6 apartments and a school, shared heating system

Residential building (a fairly new terraced house)

Building capacity 1100 m3

Required heat power 1100 x 20W22 kW

School building

Building capacity 3000 m3

Required heat power 3000 x 30W90 kW

Heating ducts

Power loss approx (200 m of heating duct, 20 W/m)

4 kW

Domestic hot water

Terraced house: maximum consumption estimate 80 kWSchool: maximum consumption estimate 75 kWPeak consumption is momentary (max.155 kW), so 80 kW is reserved and the rest borrowed from the heating; the boiler is equipped with a 150 kW service water transductor.

80 kW

Maximum power requirement 196 kW

Th e moisture diff erences in the fuel (wood chip) can be utilized

in seasonal heating requirement changes. It is more economical

to burn the drier fuel with more heating value in the winter,

when heating is needed the most. Th e wood chip that is moister,

on the other hand, can be burned in the summer. Th e moister

wood chip needs longer operating periods/heat unit produced,

and thus the features of the bio burner are utilized most

eff ectively. By shortening the rest periods, both the coeffi cient of

performance and the reliability of function are enhanced.

NOTICE! A proper heat power calculation is the basis of a well-functioning heating system! It is absolutely vital to discuss this with an expert, as the right sizing makes extra investments unnecessary and ensures the faultless functioning of the system.

4

Annual Total Energy RequirementsTh e annual total energy consumption aff ects the choice of

burning technique and fuel. In our examples, the annual

total energy consumption is in the magnitude of the adjacent

charts.

Choosing the FuelTh e most common fuels are wood chip, peat, pellet and sawdust. Th e following factors aff ect the choice of the fuel: availability, transport, storage and drying. If wood chip or peat is used as fuel, the percentage of moisture and moisture diff erences in the fuel needs to be determined. It is recommended to aim at fuel moisture that does not exceed 40% in bio systems with power less than 1000 kW. In using wood chip, the preservability factor must also be taken into account.

Annual Fuel ConsumptionWith diff erent fuels, the theoretical total annual consumpti-

on of our example properties amounts to the following:

Fuel MoistureWith modern burning techniques, even moist fuel can be

burned, but as the moisture rises, so does fuel consumption

and the need to soot the boiler. Moreover, moist fuel burns

impurely and produces more soot and ashes.

When the moisture of the wood chip rises to 20% -> 50%, the fuel consumption more than doubles!

When using very moist wood chip (>40%), it is recommended

that the devices are sized larger than the required nominal

power. Drying the moist wood chip during the burning

process requires energy, and to reach the same desired power

the machinery must be oversized. In addition, the amount of

combustion gases is greater and the tractive resistance of the

boiler rises. Th is causes the temperature of the combustion

gases to rise and the heat energy to go to waste.

Th e eff ect of moisture on the annual consumption of wood

chip in Example 2 (terraced house + school; total energy

requirement 205 000 kWh):

Seasonal Changes in ConsumptionIt must be noted that while the machinery is sized according to

the required maximum power, the consumption may drop to a

tenth of that, or even less, during the warmest time of the year.

Example 1. FARM

Residental building 34 000 kWh/year

Technical building 15 000 kWh/year

Cattle house 25 000 kWh/year

Domestic hot water 8 000 kWh/year

Total 82 000 kWh/year


Residental building Heat losses 37 000 kWh/year


School building Heat losses 120 000 kWh/year


Total 205 000 kWh/year

Farm Terraced house + school

Pellet 32 i-m3 81 i-m3

Peat 76 i-m3 190 i-m3

Wood chips 125 i-m3 290 i-m3

Moisture 20 % Annual consumption 290 i-m3



Wood chips 850 kWh/i-m3

Peat 1300 kWh/i-m3

Pellet 3150 kWh/i-m3

Thin oil 10000 kWh/i-m3

0 5000 10000

Comparison of the energy contents of different fuels

5

Choosing the Bio Burner and the Bio BoilerA calculated maximum energy requirement is usually the base

when sizing the burner and the boiler, unless there are other

heat sources in use.

In our examples, a burner and boiler combination with the

nominal output of 60 kW was chosen for the farm and one

with the nominal output of 200 kW for the terraced house/

school. Th e outputs of the burners and the boilers are given

as nominal values, meaning that 200 kW of output can be

expected from a burner-boiler combination marked as 200 kW.

When choosing a bio boiler and burner, inform the equipment

supplier of the maximum heating requirement of your facility

(kW) and the principal fuels used. Also inform the supplier of

the fuel moisture fl uctuation range (e.g. wood chip 25-40%).

Th e bio burner and the boiler form a complex and thus need to

function seamlessly together. Arimax burners and boilers have

been designed to fi t together as a complex from the start.

Th e power, couplings and connections fi t together easily, and

the most important thing – the burning result – is fi rst class.

Ask the equipment supplier at least the following important questions:

• What is the temperature of the boiler’s outgoing combustion gas at 100% power? (a good value is less than 200°C in a clean boiler)• What is the carbon monoxide percentage of the combustion gas at 50% and 100% power? (a good value is less than 0.1%)• What is the smallest amount of power output with which the plant can be operated? (e.g. 20%)• What is the burner’s back fi re protection like?• Which functions are included in the provided automatics, and which optional functions are available?• What is the weight of the boiler? (a heavy weight tells of a suffi cient fi re surface and a sturdy build)• What is the pressure class of the boiler? (e.g. 4 bar)

The Features of a Good Bio Burner• high fl ame temperature = pellet 1100°C, wood chip 1000°C, peat 950°C• low air coeffi cient, e.g. less than 1.4 (a high air coeffi cient weakens the effi ciency)• low carbon monoxide emissions (CO emissions), values less than 1000 ppm (or 0.1%)• low emission of nitrogen oxides (NOx)• wide range of use (e.g. 20-100%)• suffi cient burn back protection (safety)

The Features of a Good BoilerClean and effi cient burning require the burner to be paired

with a boiler which can transfer the heat produced by the

burner’s hot combustion gases to the boiler water as effi ciently

as possible.

- vertical convection structure (needs less maintenance)

- easy to clean

- low combustion gas temperature (150-180°C at nominal

power)

- suffi cient fi re surface (prerequisite for effi cient transmission of

heat into boiler water)

- suffi cient pressure class (enables the use of suffi ciently high

temperature)

- heavyweight boiler (tells of the fi re surface measures,

structural sturdiness and the life expectancy of the boiler)

All Ariterm boilers are manufactured according to the highest

level of the Pressure Equipment Directive. As proof of this, all

Arimax boilers have a structural temperature of 120°C and are

given the Inspecta pressure device certifi cate no. INS00-20.

High-power Bio Burning PlantsIf the power of the burner/boiler combination is not enough

to fi ll the maximum power requirements of your facility, a

traditional step grate can be used with wood chip and pellet

to produce heat up to 3 MW. Ask for more information at the

factory!

6

Fuel storage filling with front end loader

Fuel storage withbar dischargers

Fuel feeding screws(storage screw, burn screw)

Burn back protection x2• AVTA• pulse-controlled extinguishing system

Expansion tank GSM running

Output connectionInput connection

Chimney

Combustiongas cleaner

Ash screw

Ash panChimneyventilator

Ash bearerBio burnerwith blowers

Swebo

Careful planning forms the basis of a functional, economical

and easily maintained bio heating system. Before starting the

construction work, it is necessary to go through the power

requirement measurement, choice of machinery and storage

solutions based on the choice of fuel, the functionality of

maintenance and upkeep, the level of automation and fi re safety.

It is recommended to get the assistance of a professional for the

planning. As for fi re safety, it is worthwhile to contact the local

fi re authorities as soon as possible. Th is way an offi cial approval

of the fi re safety measures is obtained already at the design

stage.

Heating devices are often installed in an existing building,

but a separate boiler house or a ready-made heating container

solution is worth considering.

DRAFT OF A WELL-DESIGNED BIO HEATING SYSTEM

Some of the key factors in designing are the following:• size and fi lling method of the storage

• types and measurements of the storage discharger and the fuel

conveyors

• level of burn back protection

• level of automation and possibility of remote control and

monitoring

• automatic ash removal

• chimney ventilator and/or cleaner

7

Ceramic burning chamber

Cast iron

step grate

Especially for Wood Chip BurningArimax HakeJet is excellent for farms, woodland estates

and other places with good wood chip availability. Th e use

of wood chip is signifi cantly helpful in effi cient forestry.

Also, wood chip is an environment friendly and renewable

energy source. It can be obtained either from wood chip

producers in the vicinity or by chipping one’s own wood

reserves.

Arimax HakeJet is compatible with Arimax bio boilers and

feeding systems. Th e burner power classes are 60 kW, 80 kW,

120 kW, 150 kW, 200 kW, 250 kW ja 300 kW.

Arimax HakeJet is designed primarily for burning wood chip.

Its open, half-circle burning head is constructed from cast iron,

which makes the fi re grate very durable and long-lasting.

Due to the ceramic burning chamber, the temperature of the

C

Ø D

Arimax HakeJet from behind

Arimax HakeJet bio burners are compatible with Arimax bio boilers. Adapter fl anges for rectangular burner openings are available from the factory.

Arimax HakeJet has separate blowers for

primary and secondary air

ARIMAX HAKEJET BIO BURNER | 60 300 kW

fl ame can be raised suffi ciently high and the burning will be

clean. Th e HakeJet burner is inserted almost all the way into

the fi re chamber of the boiler, which saves space in the boiler

room. Th is may be essential when renewing the heating system

in existing buildings.

Main measurements of the burner

Arimax HakeJet 60 kW 80 kW 120 kW 150 kW 200 kW 250 kW 300 kW

measure C (mm) 515 605 705 825 905 980 1080

diameter D (mm) 330 370 410 450 500 550 600

8

ARIMAX BIOJET BIO BURNER | 60 500 kW

Water-cooled casing

Ceramic burning chamber

Cast iron step grate

Features of Arimax BioJetTh e cast iron grate of the Arimax BioJet is durable and long-

lasting. Th e water-cooling in the casing keeps the temperature

constant between heating and rest periods. Th e ceramic fi re

chamber raises the burning temperature of the fl ame even to

1100 degrees. Separate blowers for primary and secondary air

enable an optimally accurate air distribution, which in turn

makes the air coeffi cient low (less than 1.4) and causes all

combustion gases to burn up very well.

A new, segmentated cast iron grate system can handle changes

in temperature even better than before, thus lengthening the

life expectancy of the burner/grate. Th e burner is available with

standard or special-alloy steel fi re grate (e.g. for pellet use).

briquettes, wood chip and sawdust. Arimax BioJet is below the

strictest current emission limits: NOx (nitrogen oxides)

100 mg/MJ, CO (carbon monoxide content) 0.02%, which is

10 times better than the commonly accepted 0.2%.

C190

Ø D

Arimax BioJet from behind

The measurements of the BioJet T model in the 150 kW-400 kW power range are the same as in the standard model. Arimax BioJet bio burners are compatible with Arimax bio boilers. Adapter fl anges for rectangular burner openings are available from the factory.

Arimax BioJet T with grate maintenance bars

Main measurements of the BioJet burner (4 bar)

Arimax BioJet 60 kW 80 kW 120 kW 150 kW 200 kW 250 kW 300 kW 400 kW 500 kW BioJet T 500 kW

measure C (mm) 330 420 520 630 710 790 880 1030 1260 1030

diameter D (mm) 335 375 415 460 510 560 630 710 710 710

Th e BioJet burner can also be shipped as T-model, equipped

with grate maintenance bars, in the 150-500 kW class.

Th e bar model lengthens the necessary grate cleaning interval

and is especially useful with fuels that produce plenty of ash,

such as peat. In burning grain, it must be taken into account

that it also produces much ash which melts in a comparatively

low temperature; these factors increase the need to clean the

burner and boiler.

Th e machinery will also function well with a partial load.

Th e usable power range is 20-100%. For example, with an

Arimax Bio 300 kW boiler, fuelled with pellet, the coeffi cient

of effi ciency was 90% at nominal power and 85% at partial

power.

In developing the water-cooled burning head of the Arimax

BioJet burner, Th ermia has utilised the best information and

practical knowledge available from researchers and users. Th e

following fuels can be burned with Arimax BioJet: pellet, peat,

Arimax BioJet has separate blowers for primary and secondary air

9

Th e feeding screws in Arimax bio burning devices are made of

steel. Th ey are tough and designed to take the strain caused by

diff erent fuels. Th e right choice of screws is essential for the

faultless functioning of the bio feeding system.

In a one-screw system the burner and the bottom of the fuel

storage are on the same level.

In a two-screw system there is more leeway in positioning the

boiler and the storage in relation to each other. Th e free fall

funnel can also be ordered with special measurements, enabling

the designing of the device positions to fi t the existing assembly

space.

Th e two-screw system is recommended because of its better

burn back protection. Th e free fall funnel between the screws

forms a fl ame-retarding fuel-free space between the storage

and the burner. Th e funnel, along with the lifting burner screw,

enables the forming of a water seal in a burn back situation.

The maximum length of the screws is 4 m. The minimum lengths of different systems can be found in the reference drawings in the brochure (pg. 27– 37). Ash screws: see page 26

ArimaxBio boiler

Fuel storage

Burner

Feeding screw (1)

ArimaxBio boiler

Burner

Fuel storage

Feeding screws (2)

Free fall tunnel

One-screw Feeding System

Two-screw Feeding System

Measuring of the feeding screws for 40 - 500 kW bio burners

Product Burner power FuelDiam. of screwed pipe x wall thickness mm

Screw diameter mm (name) Margin mm

Arimax 540/1040 40 kW chip/pellet 114,3 x 4,5 95 (1125) 2 x 6

Bar discharger T1 40-300 kW chip/peat 159 x 5 135 (1335) 2 x 7

Bar discharger T2 40-300 kW chip/peat 159 x 5 135 (1335) 2 x 7

Bar discharger T2 400-500 kW chip/peat/briquettes 193,7 x 5 165 (10019) 2 x 7,5

Bar discharger K2 40-300 kW chip/peat 159 x 5 135 (1335) 2 x 7

Pellet storage 40-500 kW pellet 114,3 x 4,5 95 (10557) 2 x 6

FEEDING SCREWS AND CHOOSING THEM

10

Bar dischargers T1 (1,5x3 m), T2 (3x3 m), K2 (2x2 m)Th e bar discharger base T2 includes two rakes moving back

and forth, controlled by automatics, that transfer the fuel to the

storage screw in the centre of the discharger. Th e rakes function

electro-hydraulically, separate from the storage screw, which has

its own actuator. Th e discharger rakes only move as needed, so

as not to pack the fuel on the storage screw.Th e capacity of the

bar discharger base is approx. 3 m3 and it is easy to build a fuel

storage of the desired size on top of it. Th e size of the silo is

max 50 m3.

Th e bar dischargers T1 and K2 functions hydraulic and are

equipped with one rake.

Bottom size: T1=1,5x3 m and K2=2x2 m.

Max. storage size is approx. 20 m3.

Floor Discharger TPYMTh e fl oor discharger is based on the same technique as the bar

dischargers, but it is delivered in loose parts. Th e dischargers

must be assembled together with the casting work. Th e number

and length of the rakes is variable, making the fl oor discharger

ideal for diff erent storage solutions.

Th e base area of the fl oor discharger storages can vary between

7.5 – 26 m2. Th e capacity of the storage can be up to 200 m3.

T1, T2 AND K2 STANDARD EQUIPMENT

- storage screw

- storage screw motor and power transmission

- bar discharger hydraulic unit

- top part of free fall tunnel

- feeding funnel capacitive sensors

- AVTA extinguishing valve

- back burning thermostat

- fl ame control thermostat/fl ame control unit

T1 T2 K2

FUEL STORAGES AND BOTTOM STRUCTURES

11

Storage Solutions for PelletPellet, unlike wood chip, peat and briquettes, is a slippery fuel

of uniform quality. Th e pellet storage does not need dischargers

to function. Vertical steel silos, familiar from farming, are

suitable for storage. V-bottomed horizontal silos are also

common, especially in use in private homes. Th e important

thing is that the inclination of the silo walls is not under 50°;

otherwise the risk of arching is great and the system may be

extinguished due to the lack of fuel. In determining the size

of the pellet storage, it is advisable to take into account the

minimum delivery amounts of the pellet suppliers. Pellets are

not aff ected by cold air, and air humidity is not a problem.

However, it does have to be protected from water. Th e high-

density pellet will swell many times its normal size in water,

thus obstructing the feeding devices

Determining the Capacity of the Fuel StorageDecide on a suitable refi ll interval - in other words,

how often you want to take care of the fuel refi ll. Choose the

capacity of the storage according to the desired fuel storage

refi ll interval and the calculated daily consumption (calculated

by power requirement and fuel, see the adjacent chart).

Storage capacity = refi ll interval x daily consumption

Th e chart emphasizes the maximum daily fuel consumption

(consumption on the highest continuous power). In other

words, the storage capacity calculated by this value is suffi cient

for the desired refi ll interval in the coldest period in the winter.

At other times, the fuel storage refi ll interval will be longer.

Power kW Pellet i-m³ Peat i-m³ Wood chip i-m³

40 0,3 0,8 1,1

60 0,5 1,0 1,6

80 0,6 1,5 2,1

120 1,0 2,2 3,2

150 1,2 2,8 3,6

200 1,6 3,7 4,8

250 2,0 4,6 6,0

300 2,4 5,5 8,0

400 3,2 7,4 10,7

500 4,0 9,2 13,3

Example 1. FARM


Maximum power 60 kW 200 kW -

Fuel wood chip pellet peat

Suitable burner Arimax HakeJet Arimax BioJet Arimax BioJet T

Daily consumption at max. power i-m³

1,6 1,6 3,7

Desired refi ll intervall 4 days 1 week 1 week

Silo capacity 4x1,6 = 6,4 m³ 7x1,6 = 11 m³ 7x3,7 = 26 m³

12

Fire is an essential part of any bio heating system.

When working with fi re, it is always necessary to take great

care and remember that the system is as safe as its weakest

link. Nevertheless, a well designed, built and maintained bio

heating system is safe to use. In screw-conveyed solid fuel

devices the danger is caused when the fi re in the burning head

starts to crawl backwards to the direction of the fuel storage.

Th e Arimax bio burning systems have been designed with burn

back protection in mind, and the extinguishing systems will

extinguish a possible back fi re as it starts.

Th e function of back fi re protection is to stop the fi re from

crawling from the burning head through the feeding pipe to the

fuel storage in all circumstances.

The following solutions tell of the thorough fi re safety planning of the Arimax burners:- a round screw in a round feeding pipe: the pipe is always full

of fuel

- two-screw feeding system: air gap between the screws and a

lifting burning screw

- a fl ange between the burning head and the fuel feeding pipe

hinders the transmission of heat

- AVTA valve, a thermostatic extinguishing system functioning

by pressured water, backed up by an expansion tank in case of

network pressure loss. Nozzles for the burning screw and the

free fall funnel.Th e AVTA valve is self-powered and needs no

electricity etc. to function. (AVTA is standard equipment in

T1, T2 ja K2).

Burning screwHeat-insulating flange

The round feeding pipe is always full of fuel,thus stopping air flow in the pipe

Pulse controlled extinguishingsystem, functioning withpressured water

Burner

Air gap

AVTA valve opens the pressured water when the temperature settings are exceeded, unleashing the extinguishing water in the burning screw

Sweboback burning sensor

FIRE SAFETY

- pulse controlled extinguishing system, functioning by

pressurized water. A nozzle at the front end of the burning

screw will extinguish a starting fi re (accessory). Its functioning

in case of power failure can be ensured with a UPS device

- automatics, thermostat-controlled burn back protection (if

the temperature in the feeding screw rises over the set value,

the blowers will stop and the automatic system will drive the

screw for a set time to empty it of the overheated fuel)

- temperature sensors in the fuel storage

- limit switches in the burner and the lid of the silo

- automatic dry powder extinguisher system for pellet

- alarm connection to a GSM phone

In pellet systems, the water extinguisher must be replaced with

a dry powder extinguisher system.

Th e right measuring of the chimney is very important for burn

back prevention. Make sure the seam between the boiler and

chimney is airtight. Th e user must make sure that there is a low

pressure in the boiler’s fi re chamber at all times (draft from the

boiler to the chimney). If this is not the case, the risk of burn

back will increase signifi cantly.

Low pressure can be caused by a suffi ciently long chimney with

a correctly measured inner diameter. Th e surest way to take

care of a suffi cient low pressure in all circumstances is to equip

the boiler with a chimney ventilator. A low pressure gauge,

installed in the fi re chamber of the boiler, is a good accessory

for ensuring the functioning and adjustments of the system.

1. Directed by the temperature sensor, the pulse controlled extinguishing system sprays water into the feeding screw to increase fuel moisture and lower the temperature. This takes away the conditions the fi re needs to spread. The system does not turn the machinery off or make an alarm.

2. Directed by the temperature sensor, the automatic turns the screw for a set time to drive the seat of fi re out of it. The system turns the machinery off and makes an alarm.

3. Directed by the temperature sensor, the AVTA valve sprays water into the feeding system, thus extinguishing the fi re.

The abovementioned active fi re safety systems, combined with structural fi re safety solutions, guarantee a safe and functional bio heating system. For the best possible result, we recommend contacting the local fi re authorities already in the designing phase.

13

In Bar Discharging Systems1. Flame control unit

2. Burn back thermostat

3. AVTA valve, self-operated DN 25

4. Expansion tank 35-50 l, prepressure 100 kPa

5. Electromagnetic valve, 230 V

6. Pulse controlled burn back protection

7. UPS device

8. Dislocation limit

9. Alarm temperature sensor of the silo

PIA Alarm pressure gauge, 0-600 kPa

Shutter valve

Check valve

KV Cold water

In Pellet Systems1. Flame control unit

2. Burn back thermostat

3. UPS device

4. Dislocation limit

5. Jauhesammutusjärjestelmä kahdella letkulla

Shutter valve

In choosing the bio boiler, at least the following important

details should be taken into account:

- the weight of the boiler; tells of the sturdiness of the boiler

structure and its life expectancy

- pressure class; a proper pressure class (e.g. 4 bar) tells

of durability and the possibility of using the boiler in

diff erent pressures. Ensures the possibility of heating system

expansion.

- temperature of the combustion gas; the lower the temperature

of the combustion gas escaping the boiler at nominal

power, the smaller is the combustion gas loss through

the chimney. Th is makes for a good coeffi cient of boiler

performance.

1

6

5

PIA

4

KV

2

PIA

4

KV

3

8

9

7

T I I M I

1

2

4

3

T I I M I

5

BURN BACK PROTECTION CONNECTIONS

CHOOSING THE BIO BOILER

Arimax Bio Boiler Basic InformationTh e boilers are made of Finnish steel and have all the features of a

good bio boiler:

- wide power range of 40-3000 kW, pressure classes 1.5–10 bar

- strong structure, fi re surfaces 6 mm and water casing 5 mm

Finnish steel (10 bar = 8 mm/6 mm)

- correct fi re surface load of 5.2-9.4 kW/m2

- good insulation: 50 mm mineral wool, small radiation loss

- vertical convection for longer cleaning intervals

- easy to clean, hatches in the right places

14

SMART & ECONOMIC COMBUSTION

The Swebo SA2 controls are our more simple standard controls, which also are PLC controls with a smartaccessory program.

You fi rst select the basis package and then you add the functions that you wish to have as ex-tras, for example fl ame watch, backburning ther-mostat or underpressure control of a fl ue gas fan.

FBSSwebo FBS is our largest and most advances control system,. It is en rely Internet based, which means that you both adjust and moni-tor the plant via the Internet. No subscrip- on or license is required for you to be able

to log onto the Internet at any me and from any place and be able to control or set the parameters foryour system.

Swebo FBS is available in a large number of standard variants, however we can also customise a control system for you according to your desires. For example, if you wish to

connect to a higher level control system.

COMBUSTION CONTROL SYSTEMS

15

16

Powerful 1,5 bar Bio Boilers 40-150 kWTh e bio boilers in the Arimax 300 series are effi cient and

easy to use. All boilers are available as right/left models, with

burner openings always in the front and on either side. An ash

chamber comes with all boilers as a standard feature.

Th e boiler is compatible with e.g. Arimax HakeJet and BioJet

burners. Th e square burner opening enables the use of other

burner solutions as well. Th e boilers are easy to clean through

the large maintenance and cleaning hatches.

Th e chimney duct can be installed from behind or on either

side. Th e ceramic back wall of the fi re chamber adds effi ciency

and maintains clean burning, especially with moister fuels

Detachableceramicelements

Summertime use/convector bypass1 or 2 spirals

Th e bio burners in the Arimax 300 series use authentic vertical convection,

which extends the period between cleanings signifi cantly. Th e large fi re

chamber in the boiler has been designed specifi cally for bio fuels. Versatile

hatches and connections enable several diff erent assembly options.

It is also possible to install several electric resistances into the boiler

as emergency heat sources. Th e boiler convector is equipped with

a detachable ceramic bypass plate. During summertime, when heat

requirements are very small, the bypass plate can be removed. Th is makes

the operationing of the burner more steady and safe. Th e spacious ash

chamber, included as a standard feature, is insulated from the outside.

ARIMAX 300 BIO BOILER SERIES

BOILER 340 360 380 3120 3150

Power kW 40 60 80 120 150

Weight kg 462 611 776 995 1205

Capacity l 210 280 370 460 550

Max. operating pressure bar 1,5 1,5 1,5 1,5 1,5

Max. operating temperature °C 120 120 120 120 120

FIRE CHAMBER MEASUREMENTS

Height mm 780 920 1080 1150 1200

Width mm 400 480 550 650 750

Depth mm 400 480 550 650 750

Capacity m³ 0,125 0,212 0,327 0,486 0,675

Fire surf. loading kW/m² 10,8 10,8 10,8 10,7 10,2

Burner opening size mm x mm 250 x 250 360 x 360 400 x 400 440 x 440 480 x 480

OTHER MEASUREMENTS

Chimney duct size mm 138 x 226 138 x 226 138 x 226 218 x 226 218 x 226

Chimney duct, min Ø mm 150 180 200 220 250

Chimney duct length min. m 4 6 8 9 10

Outgoing/return connection DN 50 50 50 50 50

Expansion connection DN 25 25 25 25 25

Thermostat connection DN 20 20 20 20 20

Warm water spiral 56 kW yes yes yes yes yes

Additional spiral possibility 56+56 kW no yes yes yes yes

kuva

n ka

ttila

var

uste

ttu p

oltti

men

(BJ/H

J) so

vite

laip

alla

B

S2

S1

S4

H

L Bmax

S35

9

11

13

6

7

1 1

2

10

6

3

14

4

15

16

3

4

14

12

8

53

17

17

ARIMAX 300 SERIES MEASUREMENTS

BOILER 340 360 380 3120 3150

Boiler height H mm 1260 1400 1560 1630 1680

Boiler width B mm 620 700 770 870 970

Boiler depth L mm 1090 1192 1300 1440 1590

Maintenance/burner hatch measurements, mm 250 x 250 360 x 360 400 x 400 440 x 440 480 x 480

Max. transportation width B max. mm 690 770 840 942 1042

LOCATION OF THE MIDPOINT OF THE HATCHES

- side hatch, from front S1 mm 290 350 364 415 483

- side hatch, from fl oor S2 mm 530 591 625 625 635

- front hatch, from side S3 mm 310 350 385 435 485

- front hatch, from fl oor S4 mm 530 591 625 625 635

STANDARD EQUIPMENT:

- cleaning tools

- pressure gauge/thermometer

- chimney gas thermometer

- warm water spiral

LISÄVARUSTEET:

- lisäkierukka (lämpimälle käyttövedelle,

ei Arimax 340 Bio)

- savukaasupuhallin

- tuhkaruuvipaketti

- varustesarja puun polttoon (ei 3120, 3150)

(luukku, arinat, vedonsäätötermostaatti)

- varoventtiili

- sähkövastus termostaatilla 6 kW

- öljypoltinvarustus (luukkusarja)

- pellettipoltinvarustus

- *) nostosilmukka (irroitettava)

1. Damper/thermostat conn. DN20

2. Thermometer connection DN 20

3. Cold water Ø 22

4. Warm water Ø 22

5. Maintenance/oil burner hatch

6. Ash hatch

7. Cleaning hatch

8. Sooting hatch1

9. Unloading connection DN 15

10. Burner opening, can also be

on the side of boiler

11. Electric resistance connection DN 50

12. Output to network DN 50

13. Return from network DN 50

14. Expansion/safety valve DN 25

15. Chimney duct, also sides 135x185 mm

16. Chimney gas measurements

17. Nostosilmukka

*)

17

FF

E

D

L B

1 6 7 10 11

12

132

3

14

5

4

9

8

E

D

L B

1 6 10 11

12

132

14

8

3

5

4

7

9

HH

- nominal output 120...3000 kW

- compatible with Arimax BioJet and Arimax HakeJet

bio burners

- max working pressure 4-10 bar

- can be equipped with a domestic hot water transductor

- Th e boiler has the necessary hatches for cleaning and fi re

maintenance. Depending on the model, the convection

part is cleaned from the top or from the side of the boiler.

Th e position of the fi re chamber hatches can be determined

separately while ordering.

- the structure is open at the bottom; insulated ash chamber

and screw system for ash removal available as accessories

- automaattinuohous lisävarusteenaPictured here is a side-cleaned model with the ash pit accessory.

ARIMAX BIO | 120 3000 kW

(1 Measurement for the top-cleaned model; the side-cleaned model is 100 mm shorter. Ask the factory for an alternative order form.

Power kW 120 150 200 250 300 400 500 700 1000 1500 2000 2500 3000 1000-3000 kW / 6 bar and 10 bar

Width B mm 980 980 980 1030 1080 1180 1285 1485 1685 1885 1985 1985 1985 1000 kW Max. operating pressure 6 barMax. operating temperature 150°C

Boiler weight 6320 kg

1000 kW Max. operating pressure 10 barMax. operating temperature 175°C


















Depth L mm 1690 1790 1990 2090 2270 2370 2615 2915 3315 3615 4360 4960 5560

Height H mm 1540 1740 1540 1590 1640 1840 1845 2145 2345 2645 2745 3045 3295

Weight kg 1250 1450 1650 1800 2200 2700 2920 3850 6100 8650 11300 12700 13960

Capacity dm³ 500 600 710 800 860 1100 1750 2410 2850 4250 5400 6390 7330

Max. working pressure bar 4 4 4 4 4 4 4 4 4 4 4 4 4

Max. working temperature °C 120 120 120 120 120 120 135 135 135 135 135 135 135

Fire chamber width mm 700 700 700 750 800 900 1000 1200 1400 1600 1700 1700 1700

Fire chamber depth mm 800 900 900 1000 1100 1200 1300 1600 1700 2000 2300 2900 3500

Fire chamber height mm 1400 1600 1400 1450 1500 1700 1700 2000 2200 2500 2600 2900 3150

Fire chamber capacity m³ 0,7 1,0 0,8 1,1 1,3 1,8 2,2 3,8 5,5 8,1 10,2 14,3 18,7

Fire surface load kW/m² 6,3 6,8 7,7 8,1 8,9 9,1 9,2 9,3 9,5 9,3 9,4 9,3 9,5

Chimney duct location D mm 1230 (1 1430 (1 50 50 50 50 - - - - - - -

Chimney duct height E mm 250 250 250 250 250 250 - - - - - - -

Chimney duct width F mm 300 300 400 400 500 500 - - - - - - -

Output/return connection DN 50 50 65 65 65 80 80 100 100 125 150 200 200

Expansion connection DN 50 50 50 50 50 50 50 50 50 65 80 80 100

Thermostat connection DN 20 20 20 20 20 20 20 20 20 20 20 20 20

5-draught bio boilers

1. Thermostat connections2. Flame supervision glas3. Burning head maintenance hatch4. Expansion/relief valve connection5. Output connection6. Oil burner fl ange (accessory)7. Return connection8. Front convector cleaning9. Back convector cleaning10. Damper plate11. Chimney duct12. Oil burner hacth (accessory)13. Burner opening (can also be located on the side of the boiler14. Ash pit (accessory)

Side-cleaned models:

• 120 - 700 kW, cleaning from the side preferred by the customer• Accessory: 120 - 700 kW, cleaning from both sides• Recommendation: 500 - 700 kW boilers, cleaning from both sides

Top-cleaned model Side-cleaned model

18

Draft of Boiler Cross Sections

Bricked Ash Pit Measuring GuideThe ash pit can be made from bricks by scale on the spot. Boilers equipped

with steel bases are also available. The measurements are in millimetres.

Measurement h is the minimum height.

Arimax Bio 120-150 kW Arimax Bio 200-400 kW Arimax Bio 500-3000 kW

For top-sooted models, the boiler room height needs to be 2 x the height of the boiler.

Domestic hot waterTh e need for domestic hot water varies by building. Th at is why

the Arimax Bio 120-3000 kW boilers can be equipped with

a domestic hot water plate transductor most suitable for the

customer’s property. Th e advantage of the plate transductor over

the traditional hot water spiral is its signifi cantly better heat

transmission capacity and the possibility to assemble it afterwards.

It is easier to determine the right transductor power if the

following things are known of the hot water consumption:

- maximum consumption (litre per second or litre per minute)

- duration of maximum consumption (e.g. 15 minutes)

- max temperature of water (e.g. +65°C )

If accurate information is not available, the magnitude of the

measurements can be determined if it is known how many warm

water taps there are for the boiler (e.g. 2 showers, 2 kitchen taps

and 3 wash basin taps). A little oversizing of the domestic hot

water transductor does no harm. See also the Arimax APS unit

on page 26.

When using a combustion gas blower, the outgoing part of the combustion gas duct constructed in the base is done according to the table on page 23.

Power a b c d e h

120 825 730 540 - - 300

150 925 730 540 - - 300

200 925 730 536 135 - 300

250 1025 780 536 135 - 300

300 1125 830 596 155 - 500

400 1225 930 596 155 - 500

500 1325 1030 354 334 135 500

700 1625 1230 354 334 135 800

1000 1725 1430 596 374 155 800

1500 2025 1630 596 374 155 800

2000 2325 1730 1040 374 155 1000

2500 2925 1730 1040 374 155 1000

3000 3525 1730 1040 374 155 1000

a c d

b

70 70

a

h

c

b

70

Power range 200 - 400 kW

Power range 120 - 150 kW

h

Power range 500 - 3 000 kW Chimney pipe in the base

h

a c d e

b

70 70 70

19

20

Arimax Bio Boiler Standard Connecting Pattern with water-cooled Arimax BioJet Burner

In fi ve-draught boilers with power exceeding 500 kW, the diameter of the pipe is determined by the used combustion gas blower

(booster/fl ow rate – pressure loss)

Chimney pipe minimum diameters (fl ow rate 16 m/s)

The height of the chimneys is chosen according to the demands of the buildings and other surroundings.

For natural draught boilers with less than 400 kW powerChimney recommendations

The values in the chart have been calculated using good quality wood chip (moisture 35%) and well-regulated burning (residual oxygen max 8%). For moister or otherwise different fuel, the chimney has to be measured case-specifi cally.

If required, natural draught boilers can also be equipped with combustion gas blowers. Ask the factory for more information on sizing!

Boiler circulation ensures that the water returning to the boiler is not too cold (min. 60 °C). If the returning water is too cold, it affects the burning negatively and causes corrosion.

Lämmönjakopumppu (P1), paisunta-astia ja sekoitusventtiili tulee mitoittaa käyttökohteen mukaan.

Arimax Bio 120-3000 kW Chimney Recommendations

Boiler power kW 500 700 1000 1500 2000 2500 3000

Chimney Ø mm 200 250 300 350 400 450 500

Boiler power kW 120 150 200 250 300 400

Chimney Ø mm (or square side) mm 200 230 250 300 330 350

Chimney length m 9 10 12 14 15 15

Service water devices, accessory, version 1P 3 LVK pump, Grundfos, UP 20-15 N LKP 5 LJ pump, Grundfos UPS 25-40 LK KV 2 Service water heat transductor, SWEP E 30 N LKSV 2 3-way valve, kv1.6 Honeywell V5823A 2045 LKPUFV 3 Safety valve, DN 15/1.0 MPA LKPU

Service water devices, accessory, version 2P 4 LVK pump, Grundfos UP 20-45 N LKP 6 LJ pump, Grundfos UPS 32-80 LKKV 3 Service water heat transductor, LPM HL 1-32 LKSV 3 3-way valve, kv2.5 Honeywell V5823A 2052 LKPUFV 4 Safety valve, DN 20/1.0 MPA LKPU

P 1 LJ pump, Grundfos UPE 50-120 F LISP 2 LJ pump, Grundfos UPS 25-80 LKP 7 LJ pump, Grundfos UPS 25-60 LK

SV 1 3-way valve, 3.0 L/S, 10 KPA (kv 35) LISFV 1 Safety valve, DN 25/40/400 KPA 510 KG/H LKPUFV 2 Safety valve, DN 15/400 KPA LKPUPA Expansion tank, 300 l, prep. 100 KPA LKPULA Dryout protection, LABKO SET61+SET/J1 LKPUTIA Alarm thermometer, 0 … +130 °C LKPUTI Thermometer, 0 … +130 °C LKPUPIA Alarm pressure gauge, 0 … 600 KPA LKPU

AVTA Self-powered adjustment valve, DN 25 LKTSA Overheating protection 90 … +120 °C TRAFAG MST15015 LKPU Shutter valve LKPU Choking valve LKPU Check valve LKPU Automatic air vent LKPU

LK = heating plant provider (Thermia)LKPU = plumbing contractor of heating plant providerLIS = accessory

Arimax bio heating container is a ready-to-use heating plant for domestic fuelsAll technology and equipment needed for the heating plant

is already assembled, and the only necessary work in the

assembly area is the connecting of the water and heating pipes

and making the electric connections into the container main

distribution board.

Arimax bio heating containers are abundantly equipped:

continuously controlled automatic burner system and chimney

ventilators, among other things, are standard equipment. Th e

continuously controlled automatic burner system minimises

rest periods, thus enhancing the reliability and effi ciency of the

plant. Th e chimney ventilator, on the other hand, makes tall,

scenery-ruining chimneys unnecessary and helps to achieve a

controlled burning process with less risk of burn back.

When it comes to the fuel devices, the containers for pellet

heating diff er somewhat from the descriptions above. Smaller

feeding screws are suitable for pellet, and the burn back

protection system is also diff erent. In addition, it is usually

sensible to build the storages separately from vertical silos.

Th e 200-500 kW pellet containers are measured according to

the BK 300 wood chip container.

Arimax bio heating container is also excellent for a heating enterprise (ESCo)When the heating energy requirements of a property change, it

is easy to move the container into another place.

BIO HEATING CONTAINER DETAILS

1. bio burner with blowers

2. fuel storage feeding screw, free fall funnel and burning screw

3. fuel storage bar dischargers

Container main measures (mm)

Chip container Power

Bottom measures

HeightLength Width

BK 300 200 - 300 kW 7200 3260 3200

BK 500 400 - 500 kW 7200 7200 4070

200-500 kW pellet containers; measurements according to BK 300

ARIMAX BIO HEATING CONTAINERS | 200 - 500 kW

21

STANDARD EQUIPMENTChimney ventilator, combustion gas cleaner (400-500 kW), ventilator automatics, complete 2-screw feeding equipment, fuel storage (wood chip containers), quadruple back fi re protection (wood chip containers), automatical power adjustment Tiimi 5304, transfer platform line, hydraulically opened roof (wood chip containers), varolaitteet.

ACCESSORIES

Combustion gas cleaner, ash devices (extractor or screw system, ash pan), residual oxygen control, energy measuring, domestic hot water changer set, movable grate maintenance bars, GSM modem for remote use of the heating plant, automaattinuohous.

lengthwidth

widthlength

heig

ht

heig

ht

BK 300 BK 500

Photo from a trade fair (BK 200)

1.

2. 3.

Arimax Farm containersArimax Farm containers 40-150 kW are cost-effi cient and

reliably functioning, factory-made heating centres, designed

especially for farmers. Th e Farm container has everything that

is needed for heating.

All technical and other equipment the heating centre requires is

assembled in the container at the factory. On site, all you need

to do is to connect the water and heating pipe, as well as the

electrical connections.

Hydraulic opened roof

Boiler room

Fuel storage

Hakekäyttöisen farmikontin (BKF) periaatepiirros

STANDARD EQUIPMENT

Automatiikka/jatkuvasäätöinen TiiMi 5305/F, hydraulically opened roof, 2-screw feeding system, hydraulic bar discharger, triple burn back protection, chimney ventilator, domestic hot water spiral, transfer platform line.

ACCESSORIES

Residual oxygen control, energy meter, heating circuit pump, ash screw for ash removal, GSM or LAN Kit for remote use and alarms.

The Farm container is also available as a pellet version.

ARIMAX FARM CONTAINERS | 40 - 150 kW

22

Main measures (mm) Wood chip cont. BKF Pellet cont. BKFP

Height 3430 3200

From wallsWidth 3260 3260

Length 5100 5100

From eavesWidth 3480 3480

Length 5295 5295

Weight (depending on the system) 4300 - 5400 kg 3500 - 4500 kg

Ash extractorAsh removal screw

Arimax APS pump and adjuster unit Connected to the boiler with two pipes, the Arimax APS

pump and adjuster unit forms a complete heating plant system

including the HP heat transmitter, boiler system pumps,

adjusters and meters in one compact whole. Th e clearly grouped

APS unit is installed into the boiler room wall or next to it.

Th e unit takes only a little assembly space and it is easy to

perform service operations on the actuators.

Chimney Ventilators and Combustion Gas Cleaners In bigger boilers (500kW and up), it is necessary to use a

chimney ventilator due to greater draught resistance. In smaller

boilers, chimney ventilators cause an even low pressure in the

boiler. Chimney ventilators are used to decrease combustion

gas emissions. Boiler plants of over 1 MW have statutory

emission limits. Th e use of a chimney ventilator is justifi able in

smaller plants as well, due to the proximity of residential areas

or for other reasons.

Ash Removal AccessoriesTh ere is a constantly growing demand for a greater degree of

automation in bio heating systems. One of the automatised

areas is the optional equipment for ash removal. You can choose

either a time relay controlled ash screw or an ash extractor for

Arimax bio heating systems.

OTHER EQUIPMENT

APS1 APS2 APS3 APS 4

Power class kW 75 -120 130 - 200 210 - 320 330 - 500

Heat exchanger kW 120 200 300 400

Heat and hot wateradjuster

Siemens RVD 135/209

Siemens RVD 135/209

Siemens RVD 135/209

Siemens RVD 135/209

Heating circuit3-way valve

Siemens VXG44.25 -10 kvs=10



Siemens VXG31.65 vs =4,9

Service water circuit3-way valve

Siemens VXG44.20 - 6,3 kvs=6,3



Siemens VXG44.32-16 kvs =16

Heating circuit pump (P1)

GrundfosUPS 25 - 80 1 ~

GrundfosUPS 40 -120 3 ~



Service water circuit pump (P2)

GrundfosUPS 25 - 60B 1~



GrundfosUPS 25 - 60B 1 ~

Boiler circuit pump (P3)

GrundfosUPS 25 - 80 1~




Heating circuit (LJ input,LJ output) and boiler conn.

DN 50 DN 50 DN 65 DN 65

Warm service water (LV output) Cu 22 Cu 28 Cu 35 Cu 42

Cold water (KV input) Cu 22 Cu 28 Cu 35 Cu 42

Service water circulation (LV circulation) Cu 18 Cu 22 Cu 28 Cu 35

Service water production 55 °C (l/s) 0,63 1,06 1,69 2,10

Width (mm)Depth (mm)Height (mm)

1240600

1650

1240600

1650

1650800

1740

1650800

1740

23

For smaller domestic hot

water requirements, there is a

57 kW LV heat transmitter set.

Ash ExtractorTh e ash extractor is not necessarily a fi xed device; it can be moved from

one heating plant to another in a heating entrepreneur’s (ESCo´s)

vehicle or other suitable transport.

Ash Removal ScrewsWith ash screws, the ashes can be removed from both inside the fi re

chamber and under the convector part. Th e system can include one or

more screws. Every screw has its own power transmission.

Th e diameter of the ash screw is 114 mm. Plan your own ash screw

solution while you ask for an off er!

AutomaattinuohousArimax Bio-kattilat voidaan varustaa automaattinuohousvarustuksella.

Automaattinuohous vähentää kattilan puhdistustyötä sekä parantaa

hyötysuhdetta. Voidaan tehdä myös jälkiasennuksena. Kysy tarjousta!

HEADOFFICE • BULLERLEDEN 7 • 961 67 BODEN SWEDEN PHONE +46 (0)921 578 00 (SWITCHBOARD) • FAX +46 (0)921 176 73

E-MAIL [email protected] • INTERNET WWW.SWEBO.COM

industri/lantbruk- swebo bioenergy ab ...for over 30 years swebo bioenergy has delivered heating...

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