Hoval AgroLyt 20 User manual

Hoval LTD
Northgate
Newark
Nottinghamshire NG24 1JN
Phone: [phone]
Fax: [phone]
Hoval Export
Austrasse 70
9490 Vaduz
Principality of Liechtenstein
Phone: [phone]
Fax: [phone]
[e-mail]
ENG
Wood burning boiler
AgroLyt® (20-50)
Operating instructions
Subject to modifications 4 205 193 / 00 - 06/06

Overview of contents
Information about your heating system ............................................................ 3
Important notes ................................................................................................... 4
Function ............................................................................................................5-7
Heating system control .................................................................................. 8-19
- N5.1 controller ............................................................................................................................... 10-13
- N5.2 TopTronic® lambda controller .............................................................................................. 14-19
Start-up (heat-up phase) ................................................................................... 20
Reloading (wood refilling) ................................................................................ 21
Suitable and permitted fuels ............................................................................ 22
Cleaning the heating boiler .........................................................................23-24
Maintenance and checks / Shutdown .............................................................. 25
Check list in case of faults ............................................................................... 26
Error message checklist for TopTronic® lambda controller ...................... 27-28
How you can save energy ................................................................................. 29
Brief operating instructions ............................................................................. 31
2
4 205 193 / 00

Information about your heating system
AgroLyt® wood burning boiler
To be completed by the heating engineer:
Serial No.: __________________
Order No.: __________________
Boiler type: _____________________________
Boiler power rating: __________________ kW
Domestic hot water storage tank size:_________
Water heater size: ________________________
Heating controller type: ____________________
Heating pump type: _______________________
Mixing valves type: _______________________
Calculation basis for heating system
Lowest outdoor temperature: _____________ °C
Thermal output required: ________________ kW
Max. flow temperature: _________________ °C
Dear Heating System Owner,
With the purchase of this Hoval AgroLyt® wood burning
boiler, you have made an excellent choice. This boiler
- in conjunction with a domestic hot water storage
tank - offers you all the advantages of a modern and
efficient heating system.
Please read these instructions carefully. They describe
how the heating boiler works, how it is operated and
maintained.
Further information can be obtained from our Sales
and Service Centres (see last page for contact de-
tails).
Important addresses and telephone
numbers
Heating installer ____________________
____________________
Plumbing installer ____________________
____________________
Electrical installer ____________________
____________________
Chimney sweep ____________________
____________________
INTENDED USE
The AgroLyt® wood burning boilers were de-
signed for firing air-dried naturally seasoned
logs in the most optimal manner. The boiler may
not be used for burning waste, coated wood and
saw dust. It is also not intended to be utilised
for direct heating of the boiler room.
3
4 205 193 / 00

= Safety information:
(Information on personal protection)
• Keep open the air supply into the
room:
air supply and exhaust openings
may not be closed. This is important
to ensure that the combustion air
required for the correct operation of
the heating boiler can flow unhind-
ered and to protect the operating
personnel from an oxygen depleted
atmosphere.
• Never operate the boiler with open
doors. Any sparks emitted from the
boiler could cause a fire and damage
the boiler.
• While the boiler is in operation, the
doors may only be opened during
start-up and for refilling purposes.
This should be done very slowly and
carefully. Sparks and tongues of flame
can emerge through the door.
• In case of power failure:
Do not open any door and do not refill
with wood.
• Daily and monthly cleaning of the sys-
tem is necessary and must be carried
out; otherwise any possible warranty
claims may be rejected.
• If you have any doubts on the operation
of the boiler, call the heating engineer
or the Hoval customer service.
• Parents must keep their children away
from the boiler room (the heating sys-
tem is not a toy).
• Do not burn unsuitable fuels (see page
22), otherwise any possible warranty
claims may be rejected.
• Do not make any modifications to the
system (possible danger to persons;
warranty claims may be rejected).
= Warning information:
(Information on the protection of the heating
system)
Controlling the water level
Control the water level in the system at regular inter-
vals (page 25).
Flue gas temperature
If the flue gas temperature exceeds 230 ºC for a longer
period of time, it will be necessary to clean the boiler
or change the primary air setting (see page 12).
Circulation pumps
During the time periods when no heating is required,
the circulation pumps should be operated at least once
every month for approx. 2 minutes. This will effectively
prevent the pumps from getting stuck.
Gas tightness
Check the doors for gas tightness every month. Smo-
ke leaks should be avoided in order to prevent any
poisonous smouldering gases from escaping into the
boiler room. The door hinges have to be readjusted
in case of leakage; see technical information / instal-
lation instructions.
Cleaning
Periodic cleaning and inspection by the heating en-
gineer or the Hoval customer service not only extend
the useful life of the wood burning boiler, but also
increase its operating safety and ensure that high
combustion efficiency is maintained.
Protection of the boiler heating surfaces
Do not use any sprays, solvents, chlorine based clean-
ing products, paint, glue, etc. in the proximity of the
heating boiler. These substances can cause corrosion
within the boiler and the flue gas system.
Thermal safety valve, forced draught fan, draught
damper and safety valve
Correct functioning must be checked periodically by
the heating engineer.
Important notes
4
4 205 193 / 00

Function
Functional description of the heating system
It is important that the perfectly coordinated individual components function properly at all times to ensure
that your home stays warm in winter.
FUNCTION:
Burns the wood safely and environmentally friendly.
Extracts the heat from the combustion gases and
transfers it to the heating water.
The wood is combusted within the heating boiler to
release and convert the natural energy contained
therein into heat.
It is used as an intermediate storage of hot heating
water (max. 90ºC). It compensates any differences
between heat generation and demand.
It holds a reserve of domestic hot water for consump-
tion (e.g. for showering).
Controls and monitors the operation of the heating
boiler.
Adjusts the room temperature optimally and fuel effi-
ciently, independently of the outdoor temperature.
Releases the heat of the heating water into the
room.
Transports the heating water from the heating boiler to
the radiators and back into the heating boiler, where
it is reheated.
Transport the generated heat from the heating boiler
to the radiators.
COMPONENTS
Wood burning boiler
Wood
Domestic hot water
storage tank
Storage tank water
heater
Boiler control unit
Heating controller
Radiator or underfloor
heating
Heating pump
Heating water and
heating pipes
5
4 205 193 / 00

Function
Adjusts the heating flow temperature to the radiator
to maintain the desired room temperature, indepen-
dently of the outdoor temperature. This is achieved
by admixing colder return heating water.
Indicates the boiler flue gas temperature.
Displays the hydraulic pressure in the heating sys-
tem.
Eliminates any air from within the heating pipes.
Prevents overpressure in the installation.
Maintains constant the pressure in the system and
accepts the expanding water.
Mixing valve
Flue gas thermometer
Pressure gauge
Air bleeder
Safety valve
Diaphragm expansion
tank
Water heater
Depending on the selected type of heating system, some of the components can be missing or some
might be added. The heating engineer will explain the system to you.
The heating water heated by the boiler is fed into the domestic hot water storage tank from where it is dis-
tributed to heat the rooms (radiators) or for heating the domestic hot water (water heater).
Mixing valve
Radiator or floor
heating
Heating pump
Wood burning
boiler
Domestic hot water storage tank
Flue gas thermo-
meter
6
4 205 193 / 00

Function
What happens inside the
AgroLyt®?
The Hoval AgroLyt® is a state-of-the-
art, environmentally friendly wood
burning boiler that operates with 3-
stage combustion technology. The fuel
is introduced into the loading chamber
through the fuel loading door.
The AgroLyt® “bottom combustion
system” operates on the basis of three
combustion stages:
1. Primary air is supplied to the loading
chamber, drying the wood and caus-
ing its gasification.
2. The combustible gases flow through
the layer of embers into the combust-
ion chamber cone.
3. The hot gases are mixed with the
secondary air in the adjacent re-
fractory-lined vortex combustion
chamber, where they are completely
combusted.
The hot flue gases are subsequently
passed through and toward the back of
the vortex combustion chamber and, from
there, in upward direction through the
downstream heating surface, where they
transfer the heat to the heating water. From
there the flue gases pass through the flue
gas collector and are finally exhausted into
the flue by means of an extractor fan.
Figure 2
4
Extraction of smouldering gases:
The AgroLyt® is equipped with a smouldering
gas extractor which prevents any smouldering
gases from escaping while the fuel loading door
is open. The extractor operates while the fuel
loading door is open.
Figure 3
2
1
3
6
4
5
10
98
711
14
13 16
15
12
1 Fuel loading door
2 Combustion chamber and ash remov-
al door
3 Lighting and stoking door
4 Smouldering gas extraction
5 Primary air regulation
6 Secondary air regulation
7 Loading chamber
8 Grate and grate openings
9 Combustion chamber cone
10 Vortex combustion chamber
11 Ash chamber
12 Thermolytic downstream heating
surface
13 Fan
14 Cleaning aperture
15 Flue gas adapter pipe
16 Thermal safety valve
7
4 205 193 / 00

What is the function of the heating
controller TopTronic® T (optional)? The boiler control unit and the temperature sensor connected
to it represent, so to speak, the brain of the heating system.
The unit’s main functions are:
- maintaining the desired room temperature independently of
the outdoor temperature
- heating the living space when required
- producing domestic hot water (e.g. for showering) only when
required
- displaying information
Further functions:
- allows the input of the desired temperatures
- temperature monitoring
The correct settings for the heating system have already been
applied by Hoval or the installer during commissioning. Any
changes to those settings should only be carried out if you go
away on a trip or if your home is too cold or too warm.
An overview including a section with frequently asked questions/
answers is available in the operating manual of the TopTronic®T
heating controller.
Heating system control
Heating system control
8
4 205 193 / 00

Heating system control
Function of the TopTronic®T
operating elements (optional)
Rotary pushbutton:
Change and store
values
Basic procedure for changing
settings An example
Select the desired function.
Turn the rotary pushbutton to select or
change the desired parameter (flashing
word or number).
Press the Info key at any time to go back
to the basic display without storing the
values set.
Press the rotary pushbutton to store
the set value.
It is also possible to store the value
using the selected function key.
Function keys
Function keys
The central rotary pushbutton and the labelled keys are
designed for easy and straightforward operation.
9
4 205 193 / 00

Operating elements of the heating boiler equipped with the N5.1/ZN2
TopTronic®T controller
2
341
10
Heating system control
Key Designation Function
1
Main switch
ON/OFF
0 = Heating boiler OFF; Heating boiler is shut down.
I = Heating boiler ON; Heating boiler is operational.
Note: The main switch should always be turned on
(also in summer when the boiler is not in operation).
This will prevent the pumps from getting stuck.
2
Electronic heating control-
ler TopTronic®T (optional)
Maintains the desired room temperature indepen-
dently of the outdoor temperature; regulates the out-
put of the water heater.
Special brief operating instructions are provided with
the heating controller. Further information can be
obtained from the detailed operating instructions.
3Daytime room temperature Set the daytime room temperature.
4Reduced room tempera-
ture Set the room temperature for reduced heating.
5DHW temperature Set the domestic hot water temperature. Manual DHW
reloading.
6
Rotary pushbutton Change the values by turning. Confirm the values by
pressing. Function selection by pressing and turning.
7Information key Show the operating data on the display or return to the
start page.
5987 6
11
12
14 1315
16 1718
10
4 205 193 / 00

Key Designation Function
8Heating curve set-up Set the heating curve
9
� ��
Operating mode selection
key Operating mode selection
 Holiday Switch off the heating system during the holidays
(frost protection)
 Absence Temporarily switch off heating
 Party Extended heating
 Automatic Automatic heating programme according to the preset
heating times
 Summer Only domestic hot water; no heating
 Constant heating Continuous heating
 Reduced heating Continuous reduced heating
 Standby Frost protection activated
10 Manual mode / emission
measurement For heating engineer only.
11 Display The basic screen displays the day of the week, date
and time of the day, as well as the current boiler tem-
perature and room temperature (room station).
2
1
3
4
6
7
5
Possible readouts:
1 Active heating time 24h
2 Weekday display
3 Display of the active operating mode and the clock
programme
4 Time of the day
5 Selected operating mode
6 Date / Day / Month / Year
7 Room temperature (when activated)
12 Brief operating instructions
Brief operating instructions for heating controller (2) only
13
Boiler temperature control
Use this function to set the required boiler water
temperature. Recommendation: Turn the control to +
to store as much heat as possible in the storage tank.
(Setting range 75 ºC - 85 ºC)
14
Boiler temperature indicator The current boiler temperature is shown here.
Heating system control
11
4 205 193 / 00

Key Designation Function
15 Fuse Check the 6.3 A fuse if all the displays are dark. This
should only be done by the heating engineer.
16
Door lock lever
Locks the door and prevents it from being opened during
operation. The door may only be opened for refilling. This
should be done slowly and carefully. Sparks and tongues
of flame can emerge through the door.
17
Flue gas thermometer
The flue gas temperature is shown here. If the flue gas
temperature is over a longer period over 240 °C, (or
210 ºC for boilers with heating surface cleaning) the boil-
er must be cleaned. If the flue gas temperature remains
excessive, it will also be necessary to adjust the air flow
rate. See next position or call a heating engineer.
18
Air flow adjustment
(primary air)
To guarantee that the combustion is optimal, it is neces-
sary to adjust the necessary air flow rate.
The initial setting is performed by the heating engi-
neer.
The required air flow rate depends on various criteria
(e.g. type and humidity of wood, type of chimney, posi-
tion of building, etc.). Therefore, each boiler has to be
adjusted on-site.
A flue gas thermometer is essential for setting the air
flow rate!
Pre-condition for a correct setting:
The boiler must be clean; particularly the downstream
heating surface!
The primary air flow is adjusted as follows:
Set the upper adjusting knob (18) to 3 (i.e. basic set-
ting)
If the flue gas temperature at full load exceeds 230 °C *):
Turn back knob to 2 or, if necessary, to 1.
If the flue gas temperature at full load is less than 180 °C **):
Turn knob to 4 or, if necessary, to 5.
Ensure that the setting is not changed by accident!
If the flue gas temperature rises only after few weeks:
Clean the downstream heating surface!
Air flow adjustment
(secondary air)
The adjustment of the secondary air flow is carried
out and fixed by the heating engineer as part of
the commissioning work.
Heating system control
*) For boilers with heating surface cleaning system “WiKo” 200 °C
**) For boilers with heating surface cleaning system “WiKo” 160 °C
i
12
4 205 193 / 00

Function of the N5.1 controller
• The controller is switched on via the main switch 1.
• Closing the loading door initiates an automatic function sequence
- The forced draught fan is switched on at high speed (for low boiler water temperature).
- When the boiler water temperature has risen (10 K below the temperature setpoint) the fan switches
over to the 1st stage.
- The fan is switched off when the temperature setpoint at the boiler temperature control (point 13, page
11) is reached.
- If the boiler temperature falls below the temperature setpoint at the boiler temperature control, the fan
is turned back on.
• The fan is switched off if the boiler runs out of fuel. A small quantity of embers is preserved for the next
fuel load.
• The smouldering gas extractor is turned on when the fuel loading door is opened to prevent any smoulder-
ing gases from escaping.
• If the fuel does not light during heat-up, the automatic cut-out switches off the fan unit.
Heating system control
13
4 205 193 / 00

Operating elements of the heating boiler equipped with the N5.2/N2
TopTronic® lambda controller
1
6
5
4
12
3
14 10 11 2
20
19 17 16 15 18
9
78
13
Key Designation Function
1
Main switch
0 = Heating boiler OFF; Heating boiler is shut down
I = Heating boiler ON; Heating boiler is operational
Note: The main switch should always be turned on
(also in summer when the boiler is not in operation).
This will prevent the pumps from getting stuck.
2
Electronic heating control-
ler TopTronic®T (optional)
Maintains the desired room temperature independently
of the outdoor temperature; regulates the output of the
water heater.
Special brief operating instructions are provided with
the heating controller. Further information can be obtain-
ed from the detailed operating instructions.
3Daytime room temperature Set the daytime room temperature.
4Reduced room tempera-
ture Set the room temperature for reduced heating.
5DHW temperature Set the domestic hot water temperature. Manual DHW
reloading.
6
Rotary pushbutton
Change the values by turning.
Confirm the values by pressing. Function selection by
pressing and turning.
7Information key Show the operating data on the display or return to the
start page.
Heating system control
14
4 205 193 / 00

Key Designation Function
8Heating curve set-up Adjust the heating curve
9
� ��
Operating mode selection
key Operating mode selection
 Holiday Heating system off during the holidays (frost protect-
ion)
 Absence Temporarily switch off heating
 Party Extended heating
 Automatic Automatic heating programme according to the preset
heating times
 Summer Only domestic hot water; no heating
 Constant heating Continuous heating
 Reduced heating Continuous reduced heating
 Standby Frost protection activated
10 Manual mode / emission
measurement For heating engineer only
11 Display The basic screen displays the day of the week, date
and time of the day, as well as the current boiler temper-
ature and room temperature (room station).
2
1
3
4
6
7
5
Possible readouts:
1 Active heating time 24h
2 Weekday display
3 Display of the active operating mode and the clock
programme
4 Time of the day
5 Selected operating mode
6 Date / Day / Month / Year
7 Room temperature (when activated)
12 Brief operating instructions Brief operating instructions for heating controller (2)
only
Heating system control
15
4 205 193 / 00

Key Designation Function
13
Operating modes The red luminous figure indicates the currently active
operating mode.
14
Temperature indicator The red luminous figures indicate the current boiler
temperature.
15
Temperature query
With this key the 5 indicated temperatures can be viewed
sequentially. The dot behind the individual figure indicates
that the value now relates to the individual temperature and
not the operating mode.
16 STOP key a) To stop the heat-up phase (operating mode 1) if the
loading door was opened when the boiler did not
have to be heated up. This eliminates the need for
the fan to operate unnecessarily for 30 minutes.
b) If the loading door is opened during burnout, glow-
ing ember preservation or residual heat utilisation
modes (i.e. during operating mode 4, 5 or 6), the boi-
ler automatically switches over to operating mode 1
(heat-up phase) after closing the door. If, however,
no additional wood had been loaded, then it is pos-
sible to return to the original operating mode (i.e. 4,
5 or 6) by pressing the Stop key.
17 Chimney sweep key Executes the emission measurement function. This
function should only be used by the heating engineer!
18
Plus / Minus key
For adjusting the parameters.
The Plus key is also used to cancel error messages.
This function should only be used by the heating engi-
neer!
19
Boiler safety temperature
limiter unlocking
If the fan unit was turned off as a result of excessive
boiler temperature (> 100ºC) and is now locked out to
prevent automatic start-up, use this key to unlock it.
Unlocking is possible once the boiler temperature has
dropped below 80ºC. The current boiler temperature is
shown on the display (e.g. 100ºC) and on the temper-
ature indicator field (14). Please contact your Hoval
Customer Service point if the boiler safety temperature
limiter keeps locking out.
20
Fuse
Check the 6.3 A fuse if the displays 11, 13 and 14 are
dark.
This should only be done by the heating engineer!
Heating system control
16
4 205 193 / 00

Function of the N5.2TopTronic® lambda controller
• The controller is switched on via the main switch 1. The individual operating mode is shown on the dis-
play (point 13, page 16).
• Closing the loading door initiates an automatic function sequence:
- The forced draught fan is switched on at high speed (operating mode 1, optimised heat-up phase).
- The system changes over to full load mode (operating mode 2) when the flue gas temperature exceeds
about 170 ºC.
- If the storage tank temperature exceeds about 70 ºC (parameter P01, see page 19), the boiler output is
reduced to adjust it to the effectively required thermal output (operating mode 3, modulating output).
- If the storage tank temperature drops below 70 ºC during burnout, the boiler is switched back to full load
operation (operating mode 2).
• When the wood is used up and there are only embers left in the loading chamber, the burnout optimisation
mode is initiated (operating mode 4). The flow rate of the air supplied to the embers is reduced by slowing
down the fan and partially closing the air dampers.
• A drop in the flue gas temperature to below 120 ºC indicates that there is no fuel left and that only glowing
charcoal remains in the boiler. This condition triggers the shut-down of the pump and the fan unit, and
the air dampers are closed off completely; this prevents the boiler from cooling down and allows a certain
quantity of embers to remain for subsequent reloading of wood without the need for relighting (operating
mode 5, ember preservation).
• After expiry of the ember retention time (default setting 90 minutes), the system switches over to operating
mode 6 (residual heat utilisation). The heat remaining in the boiler is now transferred to the storage tank.
• The residual heat utilisation mode is completed when the boiler temperature drops below 40 ºC and the
boiler is switched off (operating mode 0, boiler off).
• The smouldering gas extractor is turned on when the fuel loading door is opened to prevent any smouldering
gases from escaping (operating mode 8). In this operating mode the forced draught fan runs at increased
speed and extracts the smouldering gases directly through the smouldering gas channel.
• If the fuel does not light during heat-up and the flue gas temperature does not rise above 120 ºC within 30
minutes, the automatic cut-out switches off the fan unit; the operating mode changes automatically from 1
(heat-up phase) back to 0 (boiler off).
The boiler control unit should always be operational (also in summer when the boiler is not operating) in order
to keep both the boiler protection function and the regular lambda sensor function test in an active state. The
associated electrical consumption is negligible.
When the main switch is turned off and then on again, the control unit reacts as if a power failure had occurred:
it automatically changes over to operating mode 1 (heat-up phase). If the boiler does not subsequently heat
up, it is possible to cancel this operating mode by pressing the “Stop” key (press for 5 seconds) to prevent
the fan from running unnecessarily for 30 minutes.
Heating system control
17
4 205 193 / 00

The lambda sensor continuously monitors the resi-
dual oxygen content in the flue gas and allows the
secondary air flow rate to be carefully adapted to the
particular operating mode and specific fuel by means
of motorised dampers. The existing advantages of
3-stage combustion (see page 7) are thus substant-
iated by further emission reductions and enhanced
efficiency.
Moreover, the TopTronic® lambda controller provides
the following additional services: thanks to the parallel
measurement of flue gas temperature and continuous
monitoring of the loading condition of the storage
tank, the thermal output of the AgroLyt® can be
continuously adapted to the actual heat demand.
This prevents an overheating or underheating when
changing fuel types.
Longer burning times result in longer intervals and
thus in more flexibility when refilling. Power modula-
tion between 100 % and 50 % of the nominal rating
takes place by means of continuous speed regulation
of the forced draught fan and the motorised primary
air damper. The range of functions of the TopTronic®
lambda controller includes heat-up optimisation for
rapid and low emission ramping up of the boiler, re-
turn temperature control, storage tank management,
burnout optimisation with ember preservation, residual
heat utilisation during standby, etc. In addition, it also
offers the possibility of remote reloading indication.
Heating system control
What are the additional benefits of the TopTronic® lambda combustion
controller?
18
4 205 193 / 00

The following settings are possible:
1) Storage tank - temperature setpoint (Parameter P 01):
Setting range 60 - 95 °C
Default setting: 70 °C
Function: When this temperature is exceeded,
the operating mode changes from 2 (full load) to
3 (part load).
Recommended settings:
• If the boiler is to be operated mainly under full
load: 75 - 80 °C
• If the boiler is to be operated mainly under part
load (results in longer burning time): 65 - 70
°C.
2) Boiler - temperature setpoint (Parameter P 02):
Setting range 80 - 95 ºC
Default setting: 80 °C; P 02 must be at least 5 °C
higher than P 01
Function: When this temperature is exceeded the
operating mode changes from 2 (full load) to 3
(part load).
3) Selection: Comfort- or energy-optimised operati-
on
(Parameter P 03; Co or Eo)
Default setting: Co
Function: In the mode “comfort-optimised operati-
on”, the ember preservation time set by the Hoval
engineer is adhered to, i.e. the comfort of the ember
preservation is utilised.
Alternative: Eo
Function: In the mode “energy-optimised operati-
on”, the ember preservation time (operating mode 5)
is reduced to 10 minutes, after which the operating
mode is changed to energy efficient residual heat
utilisation (operating mode 6).
Settings of the N5.2 TopTronic® lambda controller
&

Normal display


adjustable
with
or
Normal display
Normal display
Temperature
displays
1. ...... 5.
Heating system control
The parameters P 01, P 02 and P 03 are adjusted
as follows:
adjustable
with
or
adjustable
with
or
19
4 205 193 / 00

Start-up (heat-up phase)
When starting up the system, it is advisable to observe
the notes in the installation manual.
1. Checks:
• Are the slide valves in the heating flow and return
lines open?
• Is the combustion air supply into the boiler room
adequate?
• Is the main switch on the boiler control unit set
to “ON”?
• Are the combustion chamber door and the ash
removal door 1 closed?
• Only for N5.1 controller: Has the desired tempe-
rature been set on the boiler temperature control
(pos. 13, figure on page 11)?
Please note the information on fuels on page
22.
2. Open fuel loading door 2 and lighting door 3 (lift
door lock lever).
3. Place paper and easily ignitable kindling on the
loading chamber and light it. Fill height approx. 15
cm.
4. Close the fuel loading door 2. Lighting door 3 stays
open.
5. Wait approx. 10 minutes to allow the wood to catch
fire before loading more wood into the fuel loading
chamber.
Align the split logs in line with the
longitudinal direction of the boiler (not
criss-cross) to avoid any gaps as much
as possible. Any wood that does not
fill the full length of the loading space
should be loaded first and placed at
the very back of the chamber. The re-
maining space at the front should then
be filled crossways with wood.
6. Proceed to close the lighting door 3.
From this moment everything is done
automatically.
7. When the fuel is consumed, the auto-
matic cut-out switches off the fan unit.
Start-up
Figure 5
2
3
1
The loading chamber can be filled up to the
top with wood.
During the periods of lower heat demand (e.g.
autumn, spring), or when the heating water
storage tank is already at the desired temper-
ature (65 ºC or higher), the boiler should be
filled with less wood (see page 31 of the brief
operating instructions).
Stoking and burnout control is carried out
through the lighting door.
All doors must be kept closed during operat-
ion!
20
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