ATTACK DPX15, DPX25, DPX35, DPX40, DPX30 Instructions For Use Manual

WOOD GASIFYING

BOILER

ATTACK DPX

STANDARD, PROFI,
LAMBDA

ATTACK, s.r.o. - aktualizácia 05/2010

SK

EN

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ES
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ATTACK DPX - Wood gasifying boiler

- Assembly, control heat up and attendance training is perfomed by field engineer trained by
producer, who also fills in the protocol about boiler installation.

- At wood gasification, it comes to formation of tar and condensates (acids) in the fuel chamber.
Therefore the mixing device has to be installed with the boiler to keep minimum temperature of the
return water into boiler at 65°C.
Operation temperature of the water has to be in the range of 80-90°C.

- The boiler cannot permanently operate in the outout range lower than 50%.

- When using the circuiting pump, its operation has to be controled by detached thermostat to
ensure prescribed minimum temperature of return water.

- Boiler operation is ecological at nominal output.

- Therefore we recommend to install boiler with accumulation tanks and mixing device, which
ensures fuel saving of 20-30% and longer boiler and chimney life-time, together with more
comfortable attendance.

- If you cannot connect the boiler into accumulation, we recommend connect the boiler at least with
one equalisation basin with approximate volume of 25l per 1kW of the boiler´s output.

- Daily heating-up is necessary, when the boiler operates at lower output (summer operation and
D.H.W. heating).

- Use only dry fuel with humidity of 12-20% (output decreases with increasing humidity and fuel
consumption is increased).

- Correct boiler choice, i.e. its heating output is very important condition for economical operation
and correct boiler function. The boiler has to be chosen by nominal output adequate to temperature
losses of heated object.

- Boiler can be used only for purpose that it is intended to and only in the way described in
this manual.

- WARNING – After disconnection of operating boiler from electricity mains, the
burning continues further in attenuation regime. Do not open boiler door, until the
boiler temperature decreases under 40°C.

Guarantee for boiler is not valid if:

-it is not operated with prescribed fuel -not with wood of humidity lower than 20% or if it is used

with the fuel that is not prescribed by producer

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- the mixing device Regumat ATTACK-OVENTROP is not installed in the system to ensure

temperature of return water into boiler at least at 65°C

- functional thermostatic valve is not installed in the aftercooling circuit of the boiler (WATTS

STS20), connected to the cold water source.

This device is not intended for usage by persons (including children) that are physically, sensually,
mentally or due to unsufficient experiences and knowledge unable to use it safely without being
under control or being instructed to use by person responsible for their safety. It is necessary not to
allow children to play with the boiler.

If the electrical cord is broken, it has to be replaced with special cord, available from
producer or service technician!

Be carefull while using the device! The Lambda probe works at high temperatures (300°C)
and by uncareful manipulation there is a danger of scorch!

Warning sign

This warning sign always appears in the instruction manual, when it is necessary to warn about
possible bodily injury and material damages, if this manual is not kept properly.

Two types of warning signs are used in this manual:

WARNING Warns about life-dangerous situations and situations that may cause bodily
injury and damages, in case that necessary actions were not kept.

ATTENTION warns about less safe work methods and processes that may cause bodily

injury or material damages.

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Manual content:

2. Important

4. Content

5. Introduction, general description

6. Technical parameters

7. Boiler dimensions

8,9, 10. Instrument panel of ATTACK DPX STANDARD, PROFI LAMBDA

11. Purpose of usage, technical description, description of the STANDARD version

11. Warning

14. Technical description of DPX PROFI

15. Boiler overheating, methods of boiler regulation, error messages

16. Technical description of ATTACK DPX LAMBDA

20. Setting and putting into operation of ATTACK DPX LAMBDA

23. Safety test of ATTACK DPX LAMBDA

25. Maintenance of the heating system, fuel

26. Assembly and installation of boiler

27. Chimney, flue gas ducting, boiler connection to electricity mains

28. Boiler protection against corrosion

30. Obligate norms for projecting and assembly of boilers

31. Installation and exchange of refractory adapting pieces

32. Connection schemes

33. Connection with heat accumulators

34. Boiler protection against overheating

34. Transport, manipulation and storaging

36. Possible faults and methods of their removal

41. Schedule of dependency of resistance on thermal probe temperature of the heating water (DPX

PROFI)

42. Electrical schemes of connection of the ATTACK DPX boilers

47. ES declaration of conformity

49. Notes

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Introduction:

Dear customer,

thank you for confidence that you showed us by purchasing our product - the ATTACK wood
gasifying boiler. We wish you long and reliable operation. Proper attendance of the boiler is one of
the conditions for reliable and correct operation, so please read this instruction for use carefully.
The manual is written in the way to respect the correct operation of the boiler.
The most important conditions of correct boiler operation are following:

- choice of the right type and output of the boiler

- impeccable putting into operation

- sensitive attendance

- regular technical maintenance

- reliable service

General description

Wood gasifying boiler ATTACK DPX
Name: WOOD GASIFYING BOILER ATTACK DPX 15, 25, 30, 35, 40, 45,
IN DESIGN „STANDARD“, „PROFI“, „LAMBDA“
Type: ATTACK DPX 15, 25, 30, 35, 40, 45
Max.operation pressure: 250 kPa
Water volume: 80, 100, 110, 128 l
Electr. connection: 230 V/50 Hz/10 A
Electr. output: 60 W
Fuel: Dry wood with heat value of 15 - 17 MJ/kg, humidity of 12 - 20%,
diameter 80 až 150 mm
Nominal output: 15, 25, 30, 35, 40, 45 kW

The ATTACK DPX wood gasifying boiler is intended for economic and ecological heating of
family houses, bungalows, small plants, workshops and similar objects.
Specified fuel for ATTACK DP boilers is dry wood, e.g. logs of lengths, depending on the type of
boiler.

Description of the ATTACK DPX labelling:

ATTACK DPX 15 Standard

25 Profi
30 Lambda
35
40
45

Wood gasifying boiler.

Boiler output

Version type.

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Technical parameters:

Boiler type

DPX15 DPX25 DPX30 DPX35 DPX40 DPX45

Boiler output kW 15 25 30 35 40 45
Surface of exchanger m² 1,98 2,52 2,78 2,78 3,03 3,03
Volume of fuel chamber dm³ 65 96 112 112 128 128
Dimension of feeding opening mm 235x445 235x445 235x445 235x445 235x445 235x445
Prescribed chimney draught Pa 23 23 23 23 23 23
Max. operation overpressure of water kPa 250 250 250 250 250 250
Pressure loss of water (∆T 10K) kPa 1,9 2,3 4,4 4,4 6,6 6,6
Pressure loss of water (∆T 20K) kPa 0,6 0,7 1 1 1,8 1,8
Boiler weight kg 370 430 460 460 490 490
Diameter of flue gas connection mm 150 150 150 150 150 150
Boiler height – „A“ mm 1240 1240 1240 1240 1240 1240
Boiler width – „B“ mm 700 700 700 700 700 700
Boiler depth – „C“ mm 840 1240 1340 1340 1440 1440
Depth of chamber – „D“ mm 400 590 690 690 790 790
Protection of electrical parts IP 21 21 21 21 21 21
Electric output W 50 50 50 50 60 60
Boiler efficiency % 89 89 89 89 90 90
Boiler class 3 3 3 3 3 3
Flue gas temperature at nominal output °C 170 170 180 180 190 190
Substantive flue gas overflow at

nominal output

kg/s 0,019 0,019 0,021 0,021 0,027 0,027

Maximum noise level dB 65 65 65 65 65 65
Prescribed fuel

Dry wood with heat value of 15-17 MJ/kg, water volume min.

12% - max. 20% diameter 80-150 mm
Average fuel consumption Kg/h 3,9 6,5 7,8 9,1 10,4 11,75
Consumption per season 1 kW = 1 m3
Maximum length of wood logs mm 350 550 650 650 750 750
Burning time at nominal output hod 3 3 3 3 3 3
Volume of water in boiler l 80 100 110 110 128 128
Minimum volume of equalisation basin l 375 625 750 900 1000 1200
Connection voltage V/Hz

230/50

Range of settings of heat. Water
temperature

°C 65-90

Range of setting of room temperature
(PROFI version)

°C 10-27

Power handling capacity of boiler
regulator´ s contacts (PROFI version)

V/A 230/2

Acoustical pressure level A does not exceed 70dB (A).
Immediate top value of acoustical pressure C does not exceed 63 Pa.
Prescribed min. temperature of return water in operation is 65°C.
Prescribed operation temperature of water in boiler is 80-90°C. Producer, the ATTACK, s.r.o. reserves right of
technical changes of products without previous announcement!

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Dimensions of the ATTACK DPX boilers

DPX15 DPX25 DPX30 DPX35 DPX40 DPX45

C.H. flow
connection – „E“

G6/4“ G6/4“ G6/4“ G6/4“ G2“ G2“

C.H. return
connection – „F“

G6/4“ G6/4“ G6/4“ G6/4“ G2“ G2“

KEY:

1. BOILER BODY 2. UPPER CAP 3. FEEDING DOOR

4. ASH PAN DOOR 5. SUCTION FAN 6. CHIMNEY 7. PRIMARY AIR FLAP

8. SECONDARY AIR FLAP 9. INSTRUMENT PANEL 10. DISCHARGE VALVE

11. COOLING CIRCUIT 12. COVERING OF CLEANING OPENING 13. C.H. FLOW CONNECTION

14. C.H. RETURN CONNECTION 15. PULL ROD OF THE CHIMNEY FLAP 16. LEVER FOR EXCHANGER CLEANING

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Instrument panel

ATTACK DPX STANDARD

The wood gasifying boiler "ATTACK DPX Standard" is controled by boiler and flue gas
thermostat.

1 – Emergency
thermostat with reset

2 - Fuse
3 - Main switch
4 - Flue gas thermostat
5 - Boiler thermostat
6 –Thermomanometer

Description:

1. Emergency thermostat with reset - boiler protection against overheating (after reaching
temperature higher than 110°C it comes to boiler disconnection from electricity mains) after
decrease of water temperature under 85°C it is necessary to push the restart button manually
after removing cover of reset .

2. Fuse - boiler protection against short circuit

3. Main switch - boiler start and complete boiler stop for the case of need.

4. Flue gas thermostat - at decrease of flue gas temperature under adjusted value is the fan
switched off

ATTENTION! While heating-up, set this thermostat to 0°C. After fuel burn-out set the flue
gas thermostat to „Operation“. When the temperature decreases under adjusted value, the
suction fan is switched off. If you wish to turn the fan on again, set the lower temperature on
the flue gas thermostat. It is necessary to test the optimum setting for operation.

5. Boiler thermostat - serves for setting of max. temperature of water in boiler (after exceeding

of adjusted value is the fan switched off and boiler works at minimum output, after decrease of
given temperature is the fan switched on again and boiler works at maximum output).

6. Thermomanometer - indicates outlet water temperature from the boiler and operation pressure.

Pull rod of the chimney flap - serves to open and close the heat-up flap (everytime the feeding door
is opened).

Lever for exchanger cleaning - serves for cleaning of exchanger´s tubes

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ATTACK DPX PROFI

The ATTACK DPX Profi version in comparison with Standard version represents higher attendance
comfort, possibility of output modulation and possibility of connection of control and regulation
elements.
The boiler temperature is kept at the level set by the user, by setting up number of rotations of the
flue gas fan. The ATTACK PROFI boiler regulator measures the temperature of water in the boiler
continuously and indicates its value on the display, controlling pump of central heating at the same
time. There is a possibility to connect a room thermostat to boiler regulator. The room thermostat
ensures regulation of temperature of heated rooms. Control of gear of the four-way mixing valve is
possible as well.

1 – Electronic regulator
Profi
2 - Manometer

Frontal view of electronic regulator

1 - Switch of connection
2 - Display indicating boiler temperature
3 - Control light of heating up process
4 - Control light of boiler overheating
5 - Control light of room thermostat
6 - Knob of the boiler thermostat
7 - Control light of the C.H. pump operation
8 - Control light for insufficiency of fuel
9 - Knob of room thermostat
10 -TEST button (after pressing it,
the temperature set by knob 6 appears and the flue
gas fan is switched off for the moment )

Backward view of electronic regulator:

Setting of flue gas
fan speed during
burning up mode

Setting of post purge time of fan after reaching set up temperature of heating water

Fuse
2A

Connection of
mixing valve
(12 V)

Connecting of room temperature sensor or thermostat

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ATTACK DPX LAMBDA

1. – Green control light

2. – Yellow Green
control light

3. – Red Green control
light

4. - Display

5. – Button „+“

6. – Button „-„

7. – Button ←“

8. – Reset of emergency

thermostat

Control light 1:Lights, when the boiler was switched on by „+“(5), expires automatically after

burning out (fuel is gone and boiler is switched off). Expires also in case, when the
boiler was switched off manually by „-“ button (6).

Control light 2: Lights, when following errors occure:

o incorrectly measured values of the flue gas temperature
o see chapter Errors and warnings

Control light 3: Lights or flickers, when error or warning occurs:

o STB on - Reset (error, message (3)lights)
o incorrectly measured values of boiler temperature(error, message (3)lights)
o Too high temperature of flue gas (warning, message (3)flickers)
o Overheating – do not open! (Boiler temperature over 90°C, warning flickers

display 3)

o see chapter Errors and warnings

Display 4: Diplays operation data for different settings at errors. In case that the boiler is switched

off and no error is displayed, illumination of display expires after 15 minutes.

Button 5 (+): After first key depression, the dipslay illumination is on. Boiler is switsched on after

repeated depression of the key - heating up or loading is possible afterwards. Also
another settings given in the menu can be done via this button (see below - button 7).

Button 6 (-): Serves to switch the boiler off. This function is used only for emergency shut down,

e.g. if there is no water in the heating system or if the sensor for overheating is not
working. . Also another settings given in the menu can be done via this button (see
below - button 7).

Button 7 (←): After first key depression, the dipslay illumination is on. Enter the „Selection“

menu via repeated depression of the key. Afterwards, by „+“ (5) or „–“(6) button it is
possible to get several information and to perform different settings.

! Buttons 5 and 6 have different functions.

Button 8: Reset of the emergency thermostat button (STB)
If the STB was switched on because of too high boiler temperature (≥95˚C) and the

boiler temperature decreased to 85°C, it is possible to reset the STB by removing cover
(8) and pressing the key underneath (8). Error is removed automatically. If fault occures
again, it is necessary to inform technician.

Reasons:low warmth offtake, power failure, circuiting pump - faulty mixing valve. To

decrease temperature to 85°C, regulators switches connecting pump on.

If the flue gas fan is not working, the boiler door must not be opened!

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Purpose of usage

Ecological warmwater boiler

Ecological warmwater boiler Attack DPX is designed for heating of dwelling houses and similar
objects. The boiler is designed for burning wood only. Any dry wood can be used for burning,
mainly logs. Also wood of bigger diameter, blocks, can be used, which reduces nominal output but
prolongs burning time. The boiler cannot be used for burning filedust and small wooden debris.
This can be burnt only in small amount together with logs (max. 10%). Due to its large feed hopper
you can avoid the most demandable operation of preparation and cutting the wood into smaller
pieces.Location of the boilers in living spaces (including halls) is inadmissible!

Technical description

The boiler is designed for combustion of wood on the principle of wood gasifying using a flue gas
fan sucking flue gas from the boiler.
The body of the boiler is a weldment of metal steel plates of 6 mm thickness. It includes a feed
hopper with a heatproof shaped piece that has an oblong opening for transition of flue gas and gas.
Under it in the after-combustion space there is an ash pan In the rear part of the boiler there is
there is a pipe exchanger with turbulators joined by vertical flue channel with a fuel cut-off flap in
the upper part. There is also a suction branch for connection to the flue.
In the front wall in the upper part there is a feeding door and in the bottom part there is an ash door.
Between the door, under the front cover is the flap of the primary and secondary air. In the left
cover, in the level of the feeding door, there is a pull rod of the heating up flap controlled by the
door and the exchanger cleaning lever.
The body of the boiler is from the outside insulated by mineral fleece put under the covers of
outside jacket.In the upper part of the boiler there is a control board for electromechanical
regulation.

Technical description ATTACK DPX STANDARD

Operation prescriptions

Preparation of the boiler for operation
Before putting the boiler into operation make sure whether the system is filled with water and

deareated. Make also sure, that it does not come to decrease of heating water pressure. Check
sensors of boiler, safety thermostats and manometer, placed in casings in the rear boiler part,
rearward. Check tightness and construction of flue gas ducting. The boiler can be operated only in
accordance with these instructions in order to work properly. It can be operated only by an adult.
When installing the boiler, lay something under the rear part to elevate it in 10 mm for better
flushing and deareating. Boiler must be attended only by the trained adult person with completed
elementary education.

Attention

After the first heating up, there can be condensation and condensate may leak. This is not a defect
Condensation disappears after longer heating. When burning smaller wooden waste it is necessary
to check the temperature of flue gas which must not overcome 320°C. Otherwise the fan can be

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damaged. Creation of tar and condensate in the feed hopper is a phenomenon accompanying wood
gasifying.

If the boiler was out of order for a longer time (switched off,broke down), it is necessary to use
extreme caution when putting into operation again. In not working boiler, the pump can be blocked,
water can leak or the boiler could get frost in winter.

Heating up and operation
Before you fire up the fuel, open the feeding door and push the pull rod of the heating up flap,

which is pulled out, back to the basic position, until the trimmer engages (like at the closed door,
see the picture).

Set the flue gas thermostat to „0°C“. Put the refractory adapting piece on the thin layer of wood (cca
50mm) through the upper door - there should be a 4-3cm gap inbetween. Put the chippings on this
layer. Then put the paper or the fire wool on the chippings. Put cca 2 layers of thin dry wood on the
top. Fill the chamber to the top with used firewood. Turn on the suction fan and shut the feeding
door to the gap of cca 15mm. Set the required water temperature (80-90°C) on the output regulator.
When it is burning sufficiently (cca 10 minutes), close the feeding door. Set the flue gas thermostat
to the operation position (with the white mark above, cca 90° to the right form the zero position ­it depends on the flue gas temperature, at which is the boiler shut down required after burning out of
the fuel).

Push backwards and down

Position after pushing backwards and down

CAUTION: During the operation, the pull rod of fuel cut-off flap must be shifted in
by door into closed flap position, otherwise the fan can be damaged.

To gasify wood, there must be a reduction zone in the boiler (a layer of charcoal on the ceramic
shaped piece in the feed hopper). The layer can be created by combustion of dry wood of proper
size. When wet wood is burned, the boiler is not working as a gasifying boiler and the consumption

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of wood rises, output is lower than demanded and the service life of boiler as well as that of flue is
shortened. If the draft is as specified, the boiler works up to 70% of output even without a fan.
Electromechanical boiler regulation
Boiler regulation is executed by the boiler thermostat on the boiler panel, by which is the ventilator
controlled according to the set output temperature of the water.
The required boiler operation temperature should be set on the boiler thermostat. On the panel there
is also the flue gas thermostat, which serves for ventilator shut down shut after burning out of fuel.
At heating up it should be set to tehe position of „0°C“. After adequate burning up, set the flue gas
thermostat to the operation temperature - the fan has run and it has to shut down only after burning
out of fuel. It is possible to observe the optimum position of thermostat according to the sort of the
used fuel, chimney draught and another conditions. Watch the output water temperature on the
temperature scale of the thermanometer. The irreversible safety thermostat is also located on the
panel (version STANDARD and LAMBDA).

Refueling
For refueling open slowly the feeding door. The heating up flap will be thereby also opened. Do not
turn off the ventilator. During heating keep the feed hopper always full. To prevent smoke escape
into the boiler-room, stoke other fuel only after the original charge is burnt out at least to 1/3 of the
feeding content. Then cover live coal with a broad log and fill in as usually. The fuel must not be
pressed over the jet as this could cause the jet stuck and the boiler parameters would go wrong.

Technical description of ATTACK DPX PROFI:

During the operation, the display is showing the current temperature of outlet heating water.
Rotations of the fan are controlled in the following way:

- if during burning up process the boiler temperature is lower than 45 °C, the fan works with the

output set up by the turning of burning up button situated in rear side of regulator in the range of 40

- 100 %. (you can see it on the display, from r4 = 40% to r9 = 90 %, rF=100%), for boiler

temperature higher than 45°C, the fan works up to 100%.

- if the temperature of heating water during the operation is more than 10°C lower than the one set

up by the turning button, the fan works in 100 % output.

- if the temperature of heating water is lower than 10°C from the temperature set up by the

turning button of the boiler thermostat, the regulator decreases the output of ventilator according to
the difference between these temperatures but only to the output not lower than 40%.

- if the boiler temperature is higher or equal to the temperature set up by the turning button of the

boiler thermostat, the fan switches off.

- the ventilator switches on again after decreasing the boiler temperature in o 5°C comparing to the

set up temperature.
The regulation of boiler ensures that the pump for central heating switches off when the temperature
of oulet water in the boiler decreases under 60°C. The pump switches on again by the temperature
higher than 65°C. This is a prevention against tarring and the water steam condensation in the
boiler hopper.
To prevent explosion of accumulated gas during ignition, the boiler regulator ensures purging of
gas in the boiler in 5 seconds and then each minute until 9 minutes according to the position of the
turning post-purge time button in the rear part of the regulator. During the set up there is always

information on the display which lasts 2 seconds (P1,...., P9, P-). In case you do not wish purging

of gas in the boiler, it is necessary to set up (P--).
To make the process of burning up the boiler stable, there is a burning up system installed in the
regulator. After plugging in or stopping the alarm the regulator is automatically set up to the process
of burning up and this mode is signalled by a shining dot on the display. The process of burning up
is finished when the dot stops shining and the boiler temperature reaches the value set up by the

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thermostat. In case the temperature in the boiler does not exceed 65 °C in 2 hours of burning up
time, the regulator stops the flue gas ventilator and switches on the control light - fuel shortage.
In the time of burning out the boiler when the temperature falls under 65 °C and this condition lasts
for more than 30 minutes, the regulator stops the flue-gas fan and the control light of fuel shortage
shines on.

Fuel shortage

When the temperature of heating water in the boiler falls under 65 °C and this condition lasts for
more than 30 minutes, the regulator stops the flue-gas fan and the control light of fuel shortage
shines on. If in the burning up process the boiler temperature does not raise to more than 65°C,
fuel shortage will be shining on the display for more than 2 hours. To start the regulation again, it is
necessary to:

- refuel the boiler;

- burn the boiler up

- turn the turning button of the boiler thermostat into the maximum left position and thus stop the

alarm;

-wait until the control light of fuel shortage flickers;

- by turning button of the boiler thermostat set up the required temperature of the boiler and the

regulator starts the process of burning up

15

Boiler overheating

If the temperature of the boiler raises to more than 105 °C, the regulator stops the flue-gas fan and
the control light of boiler overheating shines on. For new start it is necessary to:

- wait until the boiler temperature falls

- remove the cause of boiler overheating (e.g. refill missing water into the central heating

circuit)

Warning! Water can be refilled only after the boiler temperature falls under 40°C.

- turn the button of the boiler thermostat into the maximum left position ad thus stop the

alarm

- wait until the control light of boiler overheating starts flickering;

- to start the regulator again, set up the required temperature of the boiler by the turning button of

the thermostat;

If the temperature falls under 60 °C, the regulator comes into the burning up mode.

Methods of regulation of the ATTACK DPX PROFI boiler

The boiler enables regulation of room temperature as well as connecting the sensor of room
temperature. If the room temperature is lower than the set up one, the control light near the button
of thermostat shines on, which means that the boiler must keep the set up temperature. After
reaching the required temperature the control light switchces off, the suction fan switches off and
the boiler starts burning at the temperature of 65 °C.
For the purposes of timing regulation by room temperature it is possible to connect any arbitrary
programmable thermostat with the terminals for the sensor of room temperature. In this case, the
turning button of the room thermostat is not working.

If you do not wish to use the room thermostat nor the room sensor, the inlet terminals must be
short-circuited. In this case only the boiler thermostat is working.

The mixing valve with the electric drive can be also connected to the boiler regulator . (This system
is not standardly delivered with the boiler).

Error messages

The boiler regulator constantly verifies the functions of internal systems and of the sensor of boiler
temperature. After finding out the defect, the regulator switches off the flue-gas fan, the central
heating pump and at the same time the defect shows on the display. In the case of breakdown it is
necessary to switch the boiler off by the main switch,to assure the continuous operation of the
central heating pump by plugging into the mains, the fuel must be burnt thoroughly and the
contract service company contacted.
If E1 fault appears on the display, it means the damage of the sensor of boiler temperature.

16

Technical description of the ATTACK DPX LAMBDA:

Combustion regulation

The boiler output is regulated by means of the exhaust temperature – to the O2 value and by means
of air flaps - actuators for the primary air and secondary air. The burn-off occurs with the adjusted
exhaust temperature set value. If the boiler temperature increases to 90°C (Over temperature)
because there is too much fuel (buffer is fully loaded), the exhaust fan is switched off, the primary
air flap is closed and the secondary air flap is opened on 25%. If the boiler temperature decreases to
to less than 88.5°C, the secondary air flap is opened for 30sec on 100% (chimney cleaning),
afterwards the primary air flap is regulated following exhaust temperature requirement.
The automatic switch off of the boiler: Switching off the boiler after the fuel is used, can be
alternatively done by means of exhaust temperature (TAG) or by the O2 value (function adjustable).
Switch off by exhaust gas temperature adjustment: If the fuel is used and the exhaust gas
temperature decreases for less than 25% of the nominal exhaust temperature, the boiler is switched
off after 15 minutes. This is recommended only with very big woodlogs or with very humid fuel.
Switch off by Oxygene: If the boiler runs for longer than 45 minutes and the O2 value rises for 15
minutes over 14%, the boiler is switched off. This should be the standard function, because cooling
down of the boiler by the chimney is limited. The remaining rest of coal makes easier renewed
firing and proves the lowest issues while heating-up.
After boiler switch off, the exhaust fan is switched off, the primary air flap is closed and the
secondary air flap still remains on 25% open until the exhaust temperature sinks under 100°C.
After switching off the boiler (automatically or manually): The primary air flap V1 is closed (0%),
the exhaust temperature is >100°C, the secondary air flap (V2) stays open to min. 25% and the
automatic operation continuation remains deactivated.

Heating-up and refuelling:
Basically: Before heating up, pay attention to heating system pressure (water level)!

Fuel has to be ready in the boiler!
Ignit the fuel (use operation prescriptions of the boiler)
Check requirement for warmth and external temperature, as well as the residual supply in
the hopper

Heating-up or refuelling only:

If it is possible due to the requirement for warmth and residual supply in the hopper, check
thermometers in the hopper.
Right firing-up follow (see operating instructions to the boiler)!

Effect: Maximum exploitation of the fuel.
Introduction: Make up the fire first, when the boiler is switched off (control light 1 does not shine),

Additional fuelling in “Boiler ON” status

The fuel has to be loaded immediately and the filling door must be immediately closed!