Herz firestar Lambda 18 User manual

Operating instructions
firestar 18 –40 Lambda

Introduction
2 Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6
INTRODUCTION
Dear Customer,
Your heating system is operated using a HERZ firestar boiler unit and we are pleased to be able to welcome
you to the wide circle of satisfied operators of HERZ equipment. The HERZ biomass furnace system is the
result of many years of experience and further development. Please take into account that a good product
also requires the correct service and maintenance, in order to be able to fulfil its function. Therefore, please
read through this documentation carefully –it will be worthwhile. Please take particular note of the safety
notes. Adhering to the operating regulations is a precondition of any claim against the factory guarantee. In
the event of faults, please contact your heating specialist or the HERZ factory customer service.
Yours sincerely
HERZ- Energietechnik
We reserve the right to make technical changes.
Version 01/2014

Table of content
Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6 3
TABLE OF CONTENT
Page
Page
1Safety notes................................... 4
1.1 Warning notes ...................................... 5
1.2 Installation ............................................ 5
1.3 Operation and maintenance................6
1.3.1 General notes.........................................6
1.3.2 Operation................................................6
1.3.3 Maintenance...........................................6
2Fuels............................................... 7
2.1 Suitable fuels........................................7
2.2 Not suitable fuels .................................7
3Starting up a cold system............. 8
4Handling of the heating system ... 9
4.1 Sealing the boiler ................................. 9
4.2 Operation with low performance
decrease................................................ 9
4.3 Overheating of the boiler.....................9
4.4 Sweating of the boiler.......................... 9
4.5 Taking out of operation ....................... 9
5Boiler operation........................... 10
5.1 Preparation for heating up ................10
5.2 Heating up...........................................10
5.3 Energy absorption capacity / STL ....11
5.4 Re-heating...........................................13
6Maintenance and cleaning.......... 13
6.1 De-ashing and cleaning general.......13
6.2 Cleaning of the heat recovery areas
(manual) ..............................................13
6.3 Cleaning of the combustion chamber14
6.4 Cleaning the flue pipe........................15
6.5 Filling shaft –Filling shaft door........15
6.6 Checking the heat exchanger...........15
6.7 Checking the water level for the
heating unit.........................................15
6.8 Keeping the boiler room clean..........15
7Fault-free operation..................... 15
8Boiler status ................................ 16
8.1 Unit off.................................................16
8.2 Burning phase ....................................16
8.3 High running phase............................16
8.4 Control phase .....................................16
8.5 Ready...................................................16
8.6 New start-up........................................16
8.7 Re-heating...........................................16
8.8 Chimney sweeper...............................16
8.9 Lambda calibration (password
protected)............................................17
8.9.1 Flue temperature control ......................17
8.9.2 Lambda control.....................................17
8.9.3 Control curve ........................................17
9Description of the menu
navigation and adjustment values18
9.1 Main menu...........................................18
9.1.1 Structure...............................................18
9.1.2 Display..................................................18
9.1.3 Modify value .........................................18
9.1.4 Code entry (only Service).....................19
9.2 Status menu (S) ..................................20
9.3 Parameter menu (P)............................22
9.4 Aggregate-Test Output (A) ................24
9.5 Aggregate-Test Input (E)....................25
10 Fault reports and their correction26
11 Emission measurement .............. 30
11.1 Measurement notes............................30
11.2 Measurement preparation..................30
11.3 Establish measurement condition
(continous operating state)...............30
11.4 Measurement performance................30
12 EC-Declaration of conformity..... 31
13 Index directory............................. 32
14 Notes............................................ 33

1
Safety notes
4 Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6
1 SAFETY NOTES
Please read the documentation carefully prior to commissioning and pay particular attention to the
marked safety notes. Please look up in these instructions anything about which you are unsure.
Ensure that you understand the instructions in this manual and that you are sufficiently informed about
the functioning of the biomass furnace system. HERZ is at your disposal at all times for any questions.
For safety reasons the operator must not alter the system, the construction or its condition, without the
agreement of the manufacturer or their authorised representative.
Ensure you have sufficient fresh air entering the boiler room. (Please take note of any regional
regulations or directives).
The tightness of all connecting points is to be monitored before the system is started up.
A portable fire extinguisher of the prescribed size must be placed in front of the boiler room. (Please
take note of any regional regulations or directives).
When opening the combustion chamber doors take care that no flue gas and sparks are released.
Never leave the combustion chamber door open. Toxic gases may be emitted.
Never heat up the boiler with liquid fuels such as petrol or similar.
Carry out maintenance work (maintenance plan) regularly or make use of our customer services. (TRVB
minimum maintenance interval are to be respected)
When maintaining the system or opening the control system the power supply must be interrupted and
the general valid safety regulations respected.
No fuels should be stored outside the equipment in the boiler room Furthermore, the storage of items
not required for operating the equipment is not permitted in the boiler room.
Always use low voltage lamps for lighting the storeroom (these must be approved for use by each
manufacturer).
The equipment can only be operated using designated fuels.
Prior to further transportation of ashes, these must be cooled down for a minimum period of 96 hours
before storage.
If you have any questions, please contact us on telephone no. +43 3357 / 42840-840.
The first start-up must be carried out by HERZ factory customer service or an authorised specialist.
(otherwise guarantee claims are invalid)
The boiler conform the regulation of the Swiss VKF and respectively the particular state regulations
regarding fire prevention. The costumer is fully responsible for the compliance with those regulations.

Safety notes
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Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6 5
1.1 Warning notes
Risk of injury from incorrect
handling of the equipment.
Material damage may also
occur.
Warning –hot surfaces
Warning –injury to hands
No access for unauthorised
persons
However, adherence to guidelines for
transportation, installation, operation and
maintenance notices as well as technical data (in
the operating instructions, product documentation
and on the equipment itself) which are not
specifically highlighted, is also vital to avoid
breakdowns which may directly or indirectly cause
major personal or material damage.
General note
For reasons of clarity and possible permutations,
this documentation does not contain all detailed
information and cannot take account of every
conceivable operating or maintenance scenario.
Should you require further information or
encounter specific problems, which are not
handled in detail in the documentation supplied,
you can obtain the required information from your
specialist dealer or direct from HERZ.
People (including children) who are not in a
position to use the equipment safely due to their
physical, sensory or mental capacities or their
inexperience or lack of knowledge should not use
this equipment without supervision or instruction
by a responsible person.
Basic safety information
Due to its functionally limited electrical and
mechanical characteristics with regard to usage,
operation and maintenance, if the equipment is
not able to work according to its appropriate use
or improper interference occurs, it may cause
serious health and material damage. It is therefore
conditional that the planning and implementation
of all installations, transportation, operation and
maintenance will be carried out and supervised by
responsible, qualified persons.
When operating electrical equipment certain parts
are inevitably under electrical tension or
mechanical stress. Only appropriately qualified
staff may work on the equipment. Staff must be
basically familiar with the content of these and all
other instructions. The smooth and safe use of
this equipment is dependent upon appropriate
transportation and storage as well as designated
operation and careful maintenance. Notes and
indications on the equipment must also be
observed.
1.2 Installation
General notes
In order to guarantee correct functioning of the
equipment, the installation of the equipment must
be carried out with adherence to the relevant
standards and installation regulations of the
manufacturer.
Manufacturer documents for the devices and
components being used the equipment are
available from HERZ upon request.

1
Safety notes
6 Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6
1.3 Operation and maintenance
1.3.1 General notes
For safe operation and
maintenance of all equipment, it is
assumed that actions will be
carried out appropriately by
qualified staff, taking heed of the
warning notes in this
documentation and the notes on
the equipment.
Under incorrect operating
conditions, temperatures above
80°C could occur at parts of the
casing.
1.3.2 Operation
General safety notes
Coverings that prevent the
moving of hot or rotating parts or
which are required for the correct
supply of air and effective
functioning must not be opened
during operation.
Any faults or unusual operating
conditions such as the emission
of smoke or the appearance of
flames mean that the equipment
must be immediately switched off
using EMERGENCY OFF. The
HERZ factory customer service
must then be notified of this
straight away.
When the main switch at the back of the
boiler is deactivated or if the power supply
fails, the equipment immediately goes out of
operation. The residual amount of fuel burns
independently without toxic gases being
given off, provided that the naturally
occurring chimney draw is sufficiently high.
The chimney must therefore be dimensioned
and designed according to EN 13384. When
resetting the installation it is obligatory to
check for serviceability and to ensure safe
operation of the total installation.
The noise caused by the machinery during
operation does not have any adverse effects
upon the health of people.
1.3.3 Maintenance
General safety measures
Before commencing any work on the equipment,
but particularly before opening coverings of parts
under voltage, the equipment must be enabled
according to the instructions. As well as the main
electrical circuit, any additional or auxiliary circuits
should be noted. The usual safety rules according
to ÖNORM are:
Switch off all poles on all sides
Ensure that they is not switched on again
Check that there is no voltage
Earth and short-circuit
Covering neighbouring live parts and isolate
dangerous parts
The aforementioned measures
may only be retracted once the
equipment is completely installed
and the maintenance completed.
For overhaul work in the
combustion chamber, ash
chamber, on flue gas-carrying
parts, emptying of the ash store,
etc., the use of personal dust
protection masks and gloves is
required.
For overhaul work in the storage
room, low voltage bulbs must be
used. The design of electrical
equipment in the storeroom must
conform to ÖNM7137.
In order to prevent any commissioning errors due
to incorrect maintenance, it is recommended that
regular maintenance servicing be carried out by
authorised staff or the HERZ factory customer
service.
Spare parts may only be obtained direct from the
manufacturer or sales partner. No health risks will
be caused to the customer from noise arising from
the machinery. Details of any residual risks can be
requested from the residual risk analysis from
Herz as required.

Fuels
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Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6 7
2 FUELS
The HERZ –firestar is suitable for burning logs to
operate central heating systems for closed hot
water installations. Smaller split logs enable
higher boiler performance than whole ones. We
recommend triangular firewood with side lengths
of 50cm and edge lengths of 8cm. Too coarse or
too long firewood may lead to reduced
performance and hollow fire. The heat value of the
wood is primarily dependent on its moisture
content. The heat value decreases with increased
moisture. The combustion of wood with high
moisture content also causes a decrease in the
degree of efficiency of the boiler.
Wood should therefore be stored for at least two
years in a dry, ventilated place. Oak needs to be
stored for about a year longer. Dry bark displays a
heat value similar to wood but there is more likely
to be increased formation of ash.
The burning of unsuitable fuels could lead to
uncontrolled combustion. The guarantee becomes
invalid! Operational faults and consequential
damage are likely to occur.
Possible consequential damage:
Damage to the thermodynamic combustion
chamber, the lambda probe, the flue gas
probe due to aggressive residues in the
boiler.
Sooting or corrosion in the filling area due to
condensation as a result of using fuel that is
too moist.
The escape of flue gas from the airflow
apertures through uncontrolled combustion
(deflagrations).
Combustion time at nominal load up to
Combustion time in hours
Type
FS 18
FS 20
FS 30
FS 40
Softwood
5
6,5
6
3,5
Hardwood
6
8
7
4,5
Wood chips
3
4
3,5
2,5
2.1 Suitable fuels
The firewood must be air dried, that is, dried at
least one year with water content below 20%,
preferable half-meter logs with an average
diameter of 10cm. Are the cleavage planes of the
log much longer, according to the log should be
thinner, in extreme cases 20 to 5cm.
Small sized material may be burned only as
admixture. From the smaller material may be
added less. Wood briquette with 6 to 10 cm
diameter according EN 14961-3.
Only one oversized log each boiler filling.
To split a root stock to such thin pieces is very
hard work. Per boiler filling maximum one large
root stock piece are burned up in the stack.
Type of
wood
Calorific values (by wood
moisture 25%) in kWh/ster
Beech
1890
Oak
1930
Pine
1520
Spruce
1330
We recommend the use of beech
wood. Do not mix different types
of wood. The use of one type of
wood promotes a consistent burn-
off. However, if it cannot be
avoided to use different types of
wood, the boiler must be filled in
layers (softwood below,
hardwood above)
2.2 Not suitable fuels
When burning wet fuel with more than 30% water
content, condensation water formation and
corrosion on the walls of the filling chamber occur.
Furthermore should not be burned:
Garbage, plastics, paper and cardboard (only for
starting the fire) sanding dust, wood shavings,
wood chips smaller than thumb-size, coal and
coke, the respective Clean Air Act (state law)
usually prohibited fuels such as old railroad ties,
plastics, particle board, impregnated wood….

3
Starting up a cold system
8 Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6
3 STARTING UP A COLD
SYSTEM
After a long period of not being used, you should
take particular note of the following points when
starting up the system:
Where the equipment has cooled down, the
boiler requires a proportionate amount of
time to reach temperature if all heat
consumers are switched on during the
heating up process. Therefore, firstly put only
one small heating circuit into operation and
only switch the other heating circuits on when
the boiler has reached its operating
temperature. The first start-up should only be
carried out by HERZ factory customer service
or persons authorised as such.

Handling of the heating system
4
Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6 9
4 HANDLING OF THE
HEATING SYSTEM
4.1 Sealing the boiler
It is imperative that all doors are closed during
operation so that no leak air can disrupt the
combustion process. If this is not observed then
damage to the boiler may result.
4.2 Operation with low
performance decrease
Should fuel be burned in the transition period
(spring or autumn) it is vital to ensure that for low
decreased performance (less than 50%) the filling
shaft is not completely put on. Decreased
performance of less than 50%, means the boiler
and the chimney may become clogged with soot.
It is also possible that smoke may develop in the
chimney. The firestar boiler should therefore
basically be operated equipped with a correctly
dimensioned buffer (according to EN 303-5).
Recommended dimensions are listed in the
document “installation instructions”.
4.3 Overheating of the boiler
Should the boiler temperature exceed maximum
boiler temperature, the safety temperature limiter
switches the controls off and the warning light
illuminates. After the equipment has cooled off
under about 75°C, the Safety Temperature Limiter
(STL) should be tripped by unscrewing the
covering cap (press the knob). Then screw up the
covering cap again afterwards. Before re-starting
the cause of the overheating should be identified
and corrected.
Thermal flow protection
If the boiler overheats then the “thermal flow
protection” opens automatically (at 95°C) via a
sensor and cold water flows through the heat
exchanger. The boiler water is thereby cooled off
and dangerous operating conditions are
prevented. The water heated up in the heat
exchanger must be able to run away freely
(directly into the waste water channel). After the
boiler water has cooled off to about 90°C the
"thermal flow safeguard” automatically interrupts
the cold water feed. After cooling off, the
equipment pressure and/or water level of the
equipment is to be controlled and if necessary the
missing amount of water topped up. According to
DIN 4751 sheet 2, the operator is obliged to
regulate the functioning of the “thermal flow
safeguard” and the heat exchanger belonging to it
at least once a month by activating the test button.
Furthermore this safety instruction is to be
monitored once a year by the manufacturing
company or another competent organisation.
Note:
Where there is a combined non-functioning of the
“thermal flow protection” and heat exchanger, the
set-up of the equipment is prohibited.
4.4 Sweating of the boiler
During long-term operation it should be
guaranteed that the return flow temperature does
not fall below 65°C. For this reason a return flow
temperature bypass is obligatory.
Note:
Corrosion damage caused by too low return flow
temperatures, do not come under the guarantee
or warranty claims.
4.5 Taking out of operation
The mains switch should not be turned to “OFF”
during the burn-off but only after complete burn-
off. (Status: unit off (1))

5
Boiler operation
10 Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6
5 BOILER OPERATION
5.1 Preparation for heating up
If possible, store enough fuel for two or three
combustion processes near the boiler room.
Prepare firewood
The firewood must correspond to size
(circumference 8 –10cm) and dimensions to the
size of the boiler. Firewood without bark burns
better.
5.2 Heating up
Warning: Risk of system damage
due to improper maintenance!
Wrong position or lack of
firebricks inside the boiler can
lead to damage or destruction of
the boiler.
Before heating up the boiler,
check the position of the
firebricks.
Warning: Risk of system damage
due to improper maintenance!
Excessive fuel feeding can cause
overheating and damage to the
boiler.
Adapt the amount of fuel to
the energy absorption
capacity of the heating
system.
Crucial for the clean burn-off in
the boiler are the correct
operation of the boiler as well as
a sufficient feed pressure of the
exhaust system.
In the following a possibility for the heating up of
the boiler is described. Depending on the ambient
conditions (draft, exhaust system, wood, and so
on) other heating up processes may be better.
Get familiar with the boiler and find out the best
handling for you to use. Test the best opportunity
for heating up the boiler.
Please note always the safety notes!
Switch on the main switch [2] and regulator
(On/Off –button, page 18). The regulator
displays status 1.
1 … Cable bushing
2 … Main switch
3 … Electric supply
After the casing door is opened the “burning”
phase (Status: 2) starts automatically.
If it is not desired or necessary to
heat up the boiler, this process
can be interrupted with a long
press of the On/Off button.
To form a good flame it is recommended that
the lower third of the filling shaft be filled with
small pieces of wood.
After that normally chopped wood (size
around 8cm) can be used for filling.
Then open the lighting up door (4) and light
up with an oil ignition, wood shavings or
cardboard.

Boiler operation
5
Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6 11
When the flue gas temperature is more than
120°C, close all doors
By sufficient feed pressure a firebed (draft) is built
up and the wood in the filling room is burning von
bottom to top.
Too short and thick wood logs
lead to an uneven burning
behaviour. Too short and thin
wood reduces the burning time
Only use wood logs according
to specification
During operation, all doors must
be closed to ensure that no false
air can disturb the combustion
process.
The heating-up time can change
due to the cleaning condition of
the boiler, the local conditions,
the used fuels and the weather
changes (low pressure in the
exhaust system).
The boiler operates according to the principle of
the lower burn-up. The control device controls the
boiler automatically and completely.
5.3 Energy absorption capacity /
STL
The energy absorption capacity of the heating
system (in general consisting of the boiler and
buffer) depends on the actual value of the water
temperature of the buffer. For economic operation
of the heating system, the amount of the used fuel
must be adjusted to the relative energy absorption
capacity. As a result, the overheating of the boiler
is avoided and the pollutant emission is reduced.
By significantly transgression of the maximum
boiler temperature, the safety temperature limiter
switches off the controller. If the system is cooled
below 75°C the safety temperature limiter (STL)
must be unlocked.
Unscrew the cover cap of the STL
Press the button of the STL. The STL is
unlocked.
Screw on the cover cap again.
Before resuming operation: Find and fix the
cause of failure

5
Boiler operation
12 Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6
Legend:
1… Control NanoControl
8 … Viewing glass
15 … Ventilator
2 … Filling shaft door
9 … Ash tray
16 … Heat exchanger pipes
3 … Primary air feed
10 … Secondary air aperture
17 … Cleaning brush
4 … Lighting-up door
11 … Primary air aperture
18 … Bellows for burner plate
5 … Burner plate
12 … Cleaning cover
19 … Bellows for primary air feeds
6 … Secondary air aperture
13 … Turbulators
7 … Ash doors
14 … Lambda sensor
18
10
11
12
14
15
13
16
6
9
7
8
5
4
3
2
1
17
19

Maintenance and cleaning
6
Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6 13
5.4 Re-heating
Depending on the wood type and quality the
burning time of a filled boiler by nominal capacity
is about three to eight hours.
By intermediate opening of the
front door or the filling room door
the combustion is disturbed.
These can lead to a poorer
combustion behaviour and
excessive escape of flue gas.
Filling should burn down
completely
To refill fuel or to check the level:
Open the casing door –with
the ventilator going at full
speed, so that the flue gas is
sucked out via the smoke
flue channel by opening the
filling shaft door (2).
Slowly open the filling shaft
(2)
Put in the fuel
Close the filling shaft door
and casing door.
A quick covering of the glow
with wood logs reduces the
leakage of hot gases from
the filling room. Refill only as
much fuel as for the energy
absorption capacity of the
system is permitted.
Pay attention to the lower
buffer temperature. If the
buffer is already loaded
(lower buffer temperature
over 40°C), please avoid a
reloading of fuel. By too
slight heat consumption the
risk of tar formation and
overheating of the boiler is
existing.
The HERZ firestar special boiler is characterised
by its long combustion duration. It does not have
to be re-filled with fuel at frequent intervals. It is
recommended that the filling shaft only be filled
according to the heating requirement, so that
frequent opening of the filling shaft door does not
have a negative effect on combustion.
6 MAINTENANCE AND
CLEANING
6.1 De-ashing and cleaning
general
In order to counteract increased fuel consumption,
rising flue temperature, decreasing efficiency
level, etc., we recommend that the boiler be
cleaned at frequent intervals. The combustion
chamber only has to be cleaned every two to six
days, depending on the type of fuel used. The
heat recovery areas are automatically cleaned at
each start-up or switching off of the equipment.
6.2 Cleaning of the heat recovery
areas (manual)
The heat exchanger pipes are to be checked
regularly for soiling and should be cleaned
manually if required (Cleaning interval is shown at
error 27 on page 27). Rust and fly ash deposits on
the heat recovery areas (16) have a considerable
effect on the economy and performance of the
boiler.
Removing the upper boiler casing
Loosening screw caps and removing
cleaning cover (12)
Loosening the fixture of the turbulators

6
Maintenance and cleaning
14 Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6
Removing and cleaning of turbulators (13)
Clean the heat exchange pipes with the boiler
brushes (17). Here the ventilator can also be
switched on in order to suck away any dust
forming in the air. This can simply be carried out
in the Unit Off (1) condition in the so-called
aggregate test. (Parameter A04 –ID Fan)
After cleaning
Set the turbulators (13) correctly again,
Put on the cleaning cover (12), tighten the
closing screws and
Install the boiler casing.
The accumulated ash should be removed via the
ash door (7).
6.3 Cleaning of the combustion
chamber
This only has to be cleaned every two to six days,
depending on the type of fuel used. When burning
fuels with a high proportion of fly ash (e.g. paper,
cardboard, bark, etc.) on combustion, the
combustion chamber should be cleaned more
frequently:
Open the casing door and ash door (7)
Clean the combustion chamber
Keep the primary air feeds (3) clean with
bellows for primary air feeds (19)
Keep the combustion plate inputs clean with
(5) clean with bellows for primary air feeds
(19)
Clean out the combustion tray and
combustion plate using the bellows for the
combustion plate (18)
Close the ash door (7) and casing door
Any elongation fissures on the
insulation plates or combustion
chamber bricks do not affect their
functioning and therefore do not
represent a claim against the
guarantee.
During cleaning ensure that the
slot between the burner plates is
not clogged (see picture below).
On the burner plates themselves,
an ash layer of about 3cm can be
left which is provided for glow
sustainment.
Note:
The combustion chamber must always be cleaned
last, as the ash may fall in the burn-off areas
when cleaning the heat exchanger pipes.

Fault-free operation
7
Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6 15
6.4 Cleaning the flue pipe
This should be cleaned at least once a month
using a chimney cleaning brush.
Note: Remove the flue temperature sensor before
cleaning as it could be damaged.
6.5 Filling shaft –Filling shaft
door
The filling shaft walls are not heating surfaces and
must therefore not be cleaned. The deposit arising
on the filling shaft walls is a normal chemical
process and flakes off from time to time by itself or
can be removed using the bellows (18).
Note:
For perfect functioning of the boiler the filling shaft
door must always be shut tightly.
The filling shaft door should be
tested for leaks once a year!
6.6 Checking the heat exchanger
In “hard water” areas in particular, there should be
checks on whether the heat exchanger is furred
up and has to be cleaned. Where faults are
identified, ongoing maintenance is offered, as this
may mean important safety checking for operation
in closed heating units (checking the heat
exchanger can be carried out by manually
pressing the thermal flow protection. There should
be a free flow of water into the heat exchanger).
6.7 Checking the water level for
the heating unit
Care should be taken that the required water level
or unit pressure (min. 1.5 bar in cold condition)
should be maintained in the heating unit. Regular
checks are required.
Too low a unit pressure may lead
to simmering noises or the build
up of steam bubbles in the unit.
6.8 Keeping the boiler room clean
Items that are not required for the operation or
maintenance of the boiler unit should not be
stored in the boiler room. Cleanliness and tidiness
enable good access for service and maintenance
and reduce the risk of accidents.
For reasons of fire protection and according to the
valid regulations: Only designated and permitted
materials are allowed to be stored in the boiler
room.
7 FAULT-FREE
OPERATION
To avoid fault-free operation, some basic points
should be adhered to for installation, service and
maintenance. The following table may be helpful
to the operator for rectifying any faults.
Please note that faults arising due to non-
adherence to installation and/or service
instructions, do not come under the guarantee or
warranty provisions.

8
Boiler status
16 Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6
8 BOILER STATUS
8.1 Unit off
In this condition the unit is switched off.
8.2 Burning phase
In the BURNING PHASE(2) condition wait to see
if the logs catch fire in the combustion chamber.
During 30 minutes an adequate flue temperature
(HEATING UP FROM MIN(P06)) is adjusted so
that it can be switched on into the HIGH
RUNNING PHASE(3) condition. If this flue
temperature is not set, it switches into the UNIT
OFF(1) condition and a fault is declared
accordingly.
In this condition it is possible to switch manually
into the UNIT OFF(1) condition.
8.3 High running phase
In the HIGH RUNNING PHASE(3) condition, after
lightings the logs, it tries to stabilise the
combustion and achieve the minimum boiler
temperature. The optional combustion control
(lambda control) is already activated at this time.
When reaching 65°C the boiler temperature (set
out in the program) is switched on into the control
phase. Should the flue temperature decrease in
this phase (under HEAT UP MIN(P06)),it
switches into the NEW START-UP(6).
8.4 Control phase
The CONTROL PHASE(4) condition carries out
actual boiler control, which splits into an output
and combustion control (OPTIONAL). If the boiler
temperature in this phase increases above the
maximum boiler temperature (BOILER
MAX(P02)), it switches into the READY(5)
condition. Should the flue temperature decrease
in this phase (HEAT UP MIN(P06)), it switches
into the NEW START-UP(6).
8.5 Ready
The maximal boiler temperature (BOILER
MAX(P02)) has been reached due to too low heat
capturing. Therefore the boiler has been switched
off. The boiler starts up again if the boiler
temperature falls 3°C below BOILER MAX(P02).
8.6 New start-up
The NEW START-UP(6) condition tries to re-
stabilise the combustion within a time limit
(adjustable via MAXIMUM RE-START(P07)). It
will always be activated if the flue temperature is
too low. If stable combustion adjusts again, it
switches immediately into the CONTROL
PHASE(4). Should a sufficient flue temperature
not be achieved after a specified time (under
HEAT-UP MIN(P06)), the boiler is switched off as
it is switched to the UNIT OFF(1) condition.
8.7 Re-heating
The RE-HEATING(7) condition is used for safe
operation for re-heating. If the customer re-heats
a larger amount of logs in operation, then this
operation is activated. The boiler then remains in
this condition for the time set. Should the boiler
temperature in the meantime increase above the
maximum boiler temperature, the boiler will be
switched off. After the set time, it switches to the
CONTROL PHASE(4) condition once an
adequate flue temperature is reached, and if the
flue temperature is too low (under HEAT UP
MIN(P06)), it is switched off and reported as a
fault. This function may only be activated by long
pressing the On/Off-switch in the STATUS MENU,
if the unit is in HIGH RUNNING(3) or CONTROL
PHASE(4).
8.8 Chimney sweeper
The CHIMNEY SWEEPING(8) condition is
available as a test mode for the chimney sweeper.
The boiler is precisely operated using rated output
and the chimney sweeper can carry out its test
measurements. The boiler usually runs high and
the chimney sweeper function is only activated
instead of the CONTROL PHASE(4). This
condition is left when deactivation occurs or when
the boiler maximum temperature is exceeded or
when the maximum chimney sweeping time is
exceeded (45min).

Boiler status
8
Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6 17
8.9 Lambda calibration (password protected)
By activating the parameter LAMBDA CALIBRATION (P20) in the parameter menu the calibration starts
(only in condition UNIT OFF(1) activatable). The lambda sensor is calibrated at the factory.
8.9.1 Flue temperature control
The flue temperature control begins if the HEAT UP FROM MIN(P06) is exceeded. The target temperature
modulates between the set values FLUE NL(P04) and FLUE PL(P05). In the high running phase as well as
when re-heating, it will be controlled at an increased flue temperature (FLUE NL + 15). The 15°C are a
setpoint specification. The actual temperature deviance may be higher.
8.9.2 Lambda control
The primary and secondary air is controlled via the lambda sensor. This serves to optimise the combustion
and can detect slight fuel fluctuations.
8.9.3 Control curve
Temperature
Flue gas –must
FLUEGAS NL
FLUEGAS TL
HEAT UP FROM MIN
65 °C
BOILER MUST
BOILER MAX
FLUEGAS NL + 15°C

9
Description of the menu navigation and adjustment values
18 Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6
9 DESCRIPTION OF THE MENU NAVIGATION AND ADJUSTMENT
VALUES
9.1 Main menu
9.1.1 Structure
The Structure of the displays consists of the menu (Parameter, Status, Aggregate-Test-Input, Aggregate-
Test-Output), the boiler status and the fault reporting.
This page loads automatically once you have switched on the equipment using the main switch (at the back
side of the boiler). From here you can navigate quite simply through the settings.
9.1.2 Display
Boiler status:
1 … Unit off
4 … Control phase
7 … Re-heating
2 … Burning phase
5 … Ready
8 … Chimney –sweeper
3 … High running phase
6 … New start up
9 … Lambda calibration
By pressing the button:
„On/Off“:
long: the equipment is switched on/off
brief: starts up the FAILURE CHECK
„F1“:
Changes to the displayed menu / Confirmation of modification
„F2“:
The bar is pushed up / increase value
„F3“:
The bar is pushed down / decrease value
„F4“:
„ENTER“ – button / aborts the modification
9.1.3 Modify value
The modification of values is ONLY possible in the menus “PARAMETER” (P01-P99) and „AGGREGATE-
TEST OUTPUT” (A01-A99). By pressing the “ENTER-Button” in those menus a „“-symbol appears next to
the active menu item. This means that the parameter can be modified. By pressing F2 or F3 the value can
then be increased or decreased respectively.
F1
F2
F3
F4
FS 20
4
11
S
P05
P06
P07
P08
P09
120
5
35
6.0
100
min
%
O2 %
°C
°C
Type of equipment
Actual
Boiler status
Fault
report
Active menu item
Function of the F - buttons
On/Off –Button

Description of the menu navigation and adjustment values
9
Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6 19
Example: Modification of parameter P02
By pressing the button:
„On/Off“:
The equipment is switched on/off
„F1“:
The modification is aborted
„F2“:
The value is increased
„F3“:
The value is decreased
„F4“:
The modification is confirmed
9.1.4 Code entry (only Service)
For safety reasons most of the menu items are password protected. The entry of the code is done via
Parameter P01 in the menu “PARAMETER”. When the code is entered correctly, the code is “active”. After
10 minutes of inactivity, the code entry will be automatically set to “inactive”.
By pressing the button:
„On/Off“:
The equipment is switched on/off
„F1“:
The first digit of the code is increased
„F2“:
The second digit of the code is increased
„F3“:
The third digit of the code is increased
„F4“:
The entry is confirmed
F1
F2
F3
F4
FS 20
4
11
P01 
P02
P03
P04
P05
90
84
180
120
°C
°C
°C
°C
+100
+10
+1

F1
F2
F3
F4
FS 20
4
11
P01
P02 
P03
P04
P05

84
180
120
80
°C
°C
°C
°C
+
-

9
Description of the menu navigation and adjustment values
20 Betriebsanleitung_firestar_18-40_Lambda_Englisch_V1.6
9.2 Status menu (S)
DESCRIPTION
S01
BOILER TEMPERATURE
Displays the boiler temperatures in °C
S02
BACKFLOW TEMPERATURE
Displays the backflow temperatures in °C
S03
BUFFER-UPPER-TEMPERATURE
Displays the current upper buffer temperature in °C
S04
BUFFER-LOWER-TEMPERATURE
Displays the current lower buffer temperature in °C
S05
FLUE GAS TEMPERATURE
Displays the current flue gas temperature in °C
S06
ID-FAN (password protected)
Displays the condition of ID-Fan in %
S07
ROTARY SPEED (password protected)
Displays the suction speed in %
S08
O2 (password protected)
Displays the O2 values (e.g. 90 = 9% O2)
S09
LAMBDA HEATING (password protected)
Displays the condition of the Lambda heating
S10
PRIMARY AIR FLAP (password protected)
Displays the actual PRIMARY AIR FLAP position in %
By pressing the button:
„On/Off“:
long: the equipment is switched on/off
brief: the fault check is started
„F1“:
(P) changes to the „PARAMETER“ menu
„F2“:
the bar is pushed up
„F3“:
the bar is pushed down
„F4“:
If the symbol „ “ is displayed, then the status (condition) changes into condition
CHIMNEY SWEEPER(9).
F1
F2
F3
F4
FS 20
4
11
S01
S02
S03
S04
S05
37
35
36
35
40
°C
°C
°C
°C
°C
P