THERMOSTAHL ECOTWIN Series User manual

COMBINED WOOD AND PELLET BOILER
ECOTWIN
INSTALLATION AND USER MANUAL
VERSION:
2.1
UPDATE:
18.01.2019

Contents
1. GENERAL INFORMATION ................................................................................... 3
1.1. Proper use of the appliance ................................................................................ 3
1.2. Safety warnings ................................................................................................ 3
1.3. Data label ........................................................................................................ 3
1.4. Document information ....................................................................................... 3
2. TECHNICAL FEATURES AND DIMENSIONS ......................................................... 4
2.1. Technical features ............................................................................................. 4
2.2. Function principle .............................................................................................. 4
2.3. Dimensions ...................................................................................................... 5
2.4. Technical data .................................................................................................. 6
2.5. Fuel................................................................................................................. 7
3. BOILER MOUNTING ........................................................................................... 9
3.1. Transportation and delivery ................................................................................ 9
3.2. Boiler room ...................................................................................................... 9
3.3. Chimney ........................................................................................................ 10
3.4. Mounting the additional door kit (optional) ......................................................... 12
3.5. Mounting the burner ........................................................................................ 14
4. INSTALLATION ................................................................................................ 15
4.1. Hydraulic connections ...................................................................................... 15
4.2. Return temperature protection.......................................................................... 15
4.3. Filling the system ............................................................................................ 16
4.4. Chain thermostat installation ............................................................................ 16
4.5. Connection diagrams ....................................................................................... 17
5. ELECTRICAL CONNECTIONS ............................................................................ 18
5.1. General instructions......................................................................................... 18
5.2. Electrical connection diagram............................................................................ 18
6. CONTROLLER ................................................................................................... 19
6.1. General description ......................................................................................... 19
6.2. Description of buttons...................................................................................... 19
6.3. Operation functions ......................................................................................... 20
6.4. Menu parameters ............................................................................................ 21
7. BOILER START-UP ........................................................................................... 23
7.1. Initial lighting checks ....................................................................................... 23
7.2. Start-up with wood.......................................................................................... 23
7.3. Start-up with pellet ......................................................................................... 23
7.4. Pellet loading .................................................................................................. 23
7.5. Feeder filling procedure.................................................................................... 24
7.6. Checks to carry after initial start-up .................................................................. 24
7.7. Operation mode .............................................................................................. 25
7.8. Chimney damper adjustment ............................................................................ 26
8. SERVICE AND MAINTENANCE .......................................................................... 27
8.1. Cleaning the boiler .......................................................................................... 27
8.2. Cleaning the chimney box ................................................................................ 28
8.3. Cleaning burner's chamber ............................................................................... 28
8.4. Maintenance intervals ...................................................................................... 28
8.5. Basic service procedures .................................................................................. 29
8.6. Maintenance after long stop.............................................................................. 29
9. TROUBLESHOOTING ........................................................................................ 31
CE DECLARATION OF CONFORMITY ............................................................................... 32

GENERAL INFORMATION
3
1. GENERAL INFORMATION
1.1. Proper use of the appliance
Before you make use of this appliance make sure you have read and fully understood the
instructions included in this manual.
The installation and use of the appliance must be performed according to the instructions
indicated in this manual in combination with the current national safety regulations.
The appliance is designed for use in pumped hot water central heating systems. Any other use
is considered improper and is prohibited. THERMOSTAHL ROMANIA declines any responsibility
for damages or injuries caused by improper use; in this case the risk is completely at the user’s
responsibility.
To ensure an efficient and flawless function of the appliance, it is strongly recommended that
you have performed an annual service by a qualified technician.
1.2. Safety warnings
All installation and maintenance procedures must be carried out by professional and authorized
personnel, in compliance with the indications in the present manual and national regulations.
Any failure to correctly install this appliance could cause damage or injuries!
Do not make modifications to parts of the appliance, unless you have contacted the company
and an authorized service contractor.
Only original accessories and spare parts must be used to ensure correct and safe function.
Make sure you respect the cleaning and maintenance procedures on the corresponding intervals.
Failure to do so can cause malfunction to the appliance and possible damages.
The boiler is design to function on the fuels indicated in the corresponding paragraph. Any other
fuel is prohibited. Do not use explosive or flammable substances! Do not store such substances
inside the boiler room.
The working pressure varies according to the model. Make sure you use the appropriate water
pressure.
Working in a pressure higher than the one indicated in this manual is strictly
prohibited and dangerous!
1.3. Data label
The data label of the appliance is placed on the boiler’s side cover, on the external part. Make
sure that it is properly placed and readable.
On the label it is indicated the serial number and the manufacturing year of the appliance.
1.4. Document information
This document is an integral and indispensable part of the product and must be retained in good
condition by the user. Keep it in a safe place for future reference.
If the appliance is sold or transferred to another person, this manual has to always follow the
appliance and handed to the new user or installer.

TECHNICAL FEATURES AND DIMENSIONS
4
2. TECHNICAL FEATURES AND DIMENSIONS
2.1. Technical features
The ECOTWIN boiler series is designed for manual function on solid fuel: wood, agricultural
residues, briquettes, with a minimum diameter of 15mm, and also wood pellet of 6-8mm
diameter automatically by means of an automatic pellet burner. The boiler is equipped with two
doors: one upper for cleaning of the heat exchanger and a lower door fuel loading and ash
removal. The wood combustion is performed by an air door and a chain thermostat regulator.
The boiler is made of steel, ideal material for thermal fluctuations, resistant to expansion and
contraction. Monobloc construction, with no other welded structures is an advantage of ECOTWIN
boiler. Also this boiler is protected against thermal shock.
The boiler body is designed so that all surfaces that are in contact with the flame are cooled by
water, including the grate where the ash and combustion residues fall. The two gas passes at
the top, the large number of flue pipes, large volume of the furnace and boiler water as well,
and symmetrical construction causes a high yield.
DESCIPTION OF COMPONENTS
Steel boiler body with heat exchanger
Removable rear smoke box with inspection cleaning door
Upper door for cleaning the heat exchanger
Lower door with flange for pellet burner mounting
Lower door with air door for manual wood function (optional)
Ash box positioned on the lower part of the fire chamber
Glasswool body insulation of 50 mm thickness
Electrostatically painted external covers
Chain thermostat regulator for wood combustion
Automatic pellet burner with feeder
Fuel tank
2.2. Function principle
The function of the boiler is based on natural gas
evacuation through the chimney. The lower door
is equipped with flange for mounting a pellet
burner and air door.
Alternative function on wood can be realized by
unmounting the burner, and mounting the blind
flange in place, and connecting the chain
regulator to the air door.
With the optional kit which includes the second
lower door, altering between pellet and wood can
be performed easily by closing the corresponding
door.
On manual mode with wood, the fuel is
positioned on the grate. The pellet combustion is
controlled by the automatic pellet burner.
The combustion takes place in the fire chamber.
During the combustion the flame comes in
contact with the side walls of the fire chamber,
which are surrounded by water. The exhaust
gases are guided through the heat exchanger to
the smoke box, and afterwards evacuated to the
chimney.
Fig 2. Boiler function

TECHNICAL FEATURES AND DIMENSIONS
5
2.3. Dimensions
Boiler
type
Wood
loading
dimensions
H
H1
W
F
L1
L
SLIM
MID
MAX
mm
mm
ECT 25
340x385
1220
1195
735
885
1035
880
935
1270
ECT 30
340x385
1220
1195
735
885
1035
880
1035
1370
ECT 40
340x385
1220
1195
735
885
1035
880
1135
1470
ECT 50
465x425
1220
1310
865
1015
1165
1000
1035
1350
ECT 60
465x425
1220
1310
865
1015
1165
1000
1135
1450
ECT 80
565x510
1220
1650
990
1140
1290
1195
1385
1735
ECT 100
565x510
1220
1650
990
1140
1290
1195
1585
1935
Boiler type
T1-T2
T3
T4
T5
inch
mm
inch
ECT 25
1½”
Ø180
¾”
2”
ECT 30
1½”
Ø180
¾”
2”
ECT 40
1½”
Ø180
¾”
2”
ECT 50
1½”
Ø180
¾”
2”
ECT 60
1½”
Ø180
¾”
2”
ECT 80
2”
Ø200
¾”
2 ½”
ECT 100
2”
Ø200
¾”
2 ½”

TECHNICAL FEATURES AND DIMENSIONS
6
2.4. Technical data
Boiler type
ECT
25
ECT
30
ECT
40
ECT
50
ECT
60
ECT
80
ECT
100
Nominal power pellet / wood
kW
25/25
30/30
40/40
50/50
60/60
80/80
80/100
Furnace power
kW
27
33
44
55
66
88
110
Efficiency pellet / wood
%
91 / 83
Boiler class2
5
Max working pressure
bar
3
Test pressure
bar
4,5
Max working temperature
 C
90
Exhaust gas temperature
 C
180-220
Fuel consumption at max
work3
kg/h
5,51
6,73
7,14
11,22
12,25
16,32
16,32
Water pressure drop (ΔΤ
20Κ)
mbar
20
24
32
48
52
60
64
Water contents
l
100
120
130
170
190
370
440
Fire chamber length
mm
480
580
680
580
680
850
1050
Weight (empty)
kg
298
325
352
402
423
735
825
Total power consumption
(without optionals)
kW
0,49
0,49
0,49
0,55
0,55
0,60
0,60
Electrical connection
V/Hz
230 / 50
1. Nominal power output is obtained with fuel type C, calorific power 4,9 kWh/kg according to
standard EN 303-5:2012.
2. According to standard EN 303-5:2012, for fuel type C (wood pellets).
3. The values are calculated for fuel type C, calorific power 4,9 kWh/kg according to standard
EN 303-5:2012.

TECHNICAL FEATURES AND DIMENSIONS
7
2.5. Fuel
2.5.1. Wood
The ECOTWIN series is designed for use with solid fuel of biogenic or fossil nature. This means
different types of natural wood, solid residues of organic nature coming from trees or agricultural
plants, wood briquettes of various types.
Good quality wood is oak, ash, beech, maple, olive tree and fruit trees, except cherry. Medium
quality wood is chestnut and birch. Low quality wood is poplar and willow.
The nominal characteristics of the boiler are calculated for use on wood!
Table 1. Calorific power of different types of wood
Every type of wood contains a significant amount of humidity, which highly affects its combustion
behavior and calorific value. Boiler output, efficiency and autonomy will significantly diminish as
the humidity increases. The nominal data presented in this manual are calculated for humidity
content 15%.
For proper and efficient function and a long lifespan, it is strictly recommended that only dry
wood is used, with a humidity content of 15%. Practically, this means at least one year dry
wood. Maximum humidity content allowed is 25%.
As understood, wood is an extremely heterogeneous fuel, due to different essences, different
humidity contents, shapes and dimensions. This is why the combustion behavior highly varies
through time and average data as fuel consumption, autonomy, and output are very difficult to
forecast.
It is prohibited the use of laminated wood, or other chemically treated wood. It
It is prohibited the use of explosive, inflammable materials, plastic, domestic
residues, etc.
0
20
40
60
2,2 2,8 3,4 3,7 4,0 4,3 4,6 4,8 5,1
Humidity [%]
Lower Calorific Power [kWh/kg]
Calorific power in relation to
humidity
Fuel
Calorific power
kWh/kg
kcal/kg
Oak
4,2
3.600
Beech
4,0
3.450
Birch
4,3
3.700
Poplar
4,1
3.500
Pine
4,4
3.800
Spruce, Fir
4,5
3.900
Wood briquettes
4,0 –4,9
3.600 –4.200
Carbon
Anthracite
5,6 –6,5
4.800 –5.600
Coal
4,5 –6,4
3.900 –5.500
Brown carbon
2,7 –4,2
2.300 –3.600
Lignite
1,6 –3,8
1.400 –3.300

TECHNICAL FEATURES AND DIMENSIONS
8
2.5.2. Pellet
Pellet is used in an automatic way by means of an automatic pellet burner. Only wood pellets
are to be used with this burner. No other fuel is allowed be used in the burner. The pellet is
deposited in the fuel tank and then automatically fed through the feeder, which is controlled by
the burner.
As fuel, it is recommended to use only premium quality wood pellet 6-8 mm diameter. Pellet of
lower quality or agropellets can only be used if approved by the manufacturer. Note that if lower
quality pellet is used, the ash produced can be signifantly bigger and the cleaning interval more
often.
Table 2. Pellet fuel characteristics
The quality of the pellets, calorific power, humidity and ash content is very
important for the boiler function and efficiency!
Normally, if using pellets with low ash content (DIN+ quality certification) the burner needs
cleaning once every week. If low quality pellets are used this might be needed up to once a day.
It is prohibited the use of processed wood pellets, or other chemical treatment.
It is prohibited the use of explosive, inflammable materials, plastic, domestic
residues, etc.
NEVER BURN ANY TYPE OF CORN, CHERRY PITS, STICKS OR OTHER TYPES OF FUEL
IN THE BURNER.
Pellet fuel characteristics
Diameter
6-8 mm
Length
12-30,5 mm
Density
650-700 kg/m3
Ash content
<1%
Calorific power
>4,8 kWh/kg
Humidity content
<8%

INSTALLATION
9
3. BOILER MOUNTING
3.1. Transportation and delivery
The boiler is delivered on wood pallet, well positioned with metal plates. Remove them carefully
by unscrewing the screws holding them in place.
The loading and unloading of the boiler must be performed with a forklift or a crane.
The boiler is very heavy. Do not try to lift by hands or other unsuitable
equipment. Danger of injury! Perform all moves with extreme caution.
Remove the boiler packaging with attention. Keep the packaging material away from
children since it can be dangerous. After having unpacked everything, make sure that the
appliance is intact and undamaged. In case of doubt do not use the appliance and inform the
supplier.
The ECOTWIN boiler is delivered with the following equipment:
Boiler steel body
Rockwool insulation mounted on the boiler body
Metal covers mounted on the boiler body
Pellet burner
Fuel feeder
Fuel tank
Ash box
Cleaning tools
Chain regulator
A second door for alternative wood combustion (optional)
In the documentation folder you will find:
Technical manual
Warranty leaflet
Declaration of conformity
3.2. Boiler room
3.2.1. General requirements
The boiler must be installed in a special and separate room. This room must be chosen so that
it offers easy access for fuel transport, air supply and exhaust gas evacuation. The doors of the
boiler room must be metallic, open outwards, and have at least 0,9 m width.
The boiler installation is prohibited in rooms with extensive dust, dangerous
gases, and moist spaces.
For the correct boiler function it is necessary that the boiler room has openings for natural
ventilation and combustion air supply. It is recommended that two different openings are used
for this purpose, positioned on opposite walls and diagonally to ensure good air circulation. The
total surface of the openings must be at least 1/12 of the boiler room surface. Forced ventilation
is prohibited in the boiler room.
The boiler room must be provided with a drainage channel. All safety devices must be connected
to this channel.
The boiler room must have an appropriate fire extinguishing system, according to the regulations
in force. In case that the building is designed with a fire alarm system, a smoke detector must
be positioned on top of every boiler.
The fuel storage is prohibited in the boiler room. If so, the storage must be separated from the
boiler with a non-flammable wall, and proper distanced from the boiler.

INSTALLATION
10
3.2.2. Boiler room dimensions
The boiler must be placed on a horizontal plane, with adequate mechanical resistance to support
the boiler’s weight. The boiler must be positioned in the room in such a way so that it is easily
accessible from all the sides. The following dimensions are recommended (see Fig 2):
The distance between the boiler and the back
wall - is the proper distance that allows easy
access for inspection and maintenance.
The distance between the boiler and side wall -
at least 0.6 m.
The height of the boiler room - at least 2 m.
Access and service spaces of boiler room and hall
doors paths will always be free.
In the boiler room will be displayed operating
instructions, taking into account the specificities
of the boilers mounted. Also, you will see internal
instructions of staff and service duties.
Fig 2. Boiler room dimensions
3.3. Chimney
The chimney installation must supply sufficient draught, air tightness and protection against
condensation.
The appropriate chimney installation is very important for the boiler’s efficient
and safe function!
The chimney must be positioned if possible in the interior of the building. It must be vertical,
with no changes in the direction. The cross-section of the chimney can be round or rectangular.
If the chimney is installed in the exterior, it must be insulated.
The horizontal part connecting the boiler’s chimney pipe with the vertical chimney must have
maximum length 2 m. If this distance is bigger, it is recommended to have a 15-30oinclination
upwards. The connection with the boiler’s chimney pipe must be air-tight.
The chimney must be equipped with a cleaning door at its base. Also cleaning doors are
recommended where there are changes in direction and ash can be accumulated. Tactical
cleaning is recommended (every 3 months) for efficient boiler function.
A chimney terminal must be installed at the end of the chimney for protection against weather
effects and foreign objects entrance. In areas with strong winds a special anti-downdraught
terminal is recommended.
The chimney height must exceed the roofline by at least 1 m. If there are other obstacles
positioned on the roof, the chimney height must exceed them by at least 1 m. If there are
multiple chimneys, minimum distance between them is 0,3m.

INSTALLATION
11
Each boiler should be connected to an independent chimney. Connection of multiple
boilers to the same chimney is not recommended.
Fig 3. Chimney distances
Fig 4. Chimney connection

INSTALLATION
12
3.4. Mounting the additional door kit (optional)
With the optional kit which includes the second door, altering between fuels is performed just
by closing the corresponding door.
To install the second door follow the next steps:
Remove the side cover
Instal the hinge screw on the front plate of the boiler according to drawing with fixing nut
and tightening nut and fix tightly
Place the door into position by introducing the hing pin in the hole of the hinge screw mounted
before
Close the door and make necessary adjustments for door air-tightness
Fig 5. Mounting the additional door
Legend
1
Additional door
2
Hinge pin
3
Hinge screw
4
Tightening nut
5
Hinge nut

INSTALLATION
13
Fig 6. Mounting the two doors

INSTALLATION
14
3.5. Mounting the burner
The burner is mounted on the lower door flange. First mount the insulation gasket and then
the burner with the four screws included, like in Error! Reference source not found.. Make
ure that the burner tube is correctly positioned inside the fire chamber, and the door opens
normally.
Fig 7. Mounting the burner
The pellet silo must be positioned normally from the right side of the boiler, so that the door
opens easily. It must be positioned as close to the boiler as possible so that the feeder length
will be sufficient.
The pellet feeder must be inserted in the silo before you fill it with pellets. The feeder must be
positioned with inclination, optimum at 30-45oto the floor. The pellet feeder cannot be
positioned at angle more than 45o, nor vertically or horizontally! After positioning
secure it so that it doesn’t move. The connection between the pellet feeder and the burner is
done by a flexible hose. This hose must also have an inclination and be tightened so that it
allows free fall of the pellets towards the burner. The connection of the hose with the burner
and the feeder must be air-tight. Use the tighteners provided.
The positioning of the pellet feeder and the silo are very important to the
burner’s operation! If not positioned correctly it can cause malfunction and stop of
the burner.
Legend
1
Burner mounting flange
2
Burner gasket
3
Fixing screws
4
Pellet burner

INSTALLATION
15
4. INSTALLATION
4.1. Hydraulic connections
The boiler is intended for connection with an open expansion vessel network. The boiler can be
connected also with closed expansion vessel, if it is equipped with an overheating serpentine
(optional).
The boiler is intended for maximum working temperature 90oC and maximum pressure 3 bars.
When connected with a closed expansion vessel, its volume must be chosen double to a similar
installation on liquid or gas fuel.
If a connection pipe is not used, it must be sealed before water fill!
4.2. Return temperature protection
For the correct function of the boiler and for protection against corrosion it is very important to
ensure steady temperature at the return of the boiler of at least 55oC.
This can be ensured by installing a recirculation pump between the boiler outlet and return (see
connection diagrams).
An alternative variation is by installing at the return of the boiler a three-way thermostatic valve.
Having a return temperature less than 55oC is very dangerous for the boiler long-
life and can cause warranty loss!
Legend
T1
Outlet
T2
Return
T3
Chimney pipe
T4
Discharge connection
T5
Safety heat exchanger connection
T6
Safety heat exchanger sensor bulb
connection
T7
Boiler sensors bulb
T8
Chain regulator connection

INSTALLATION
16
4.3. Filling the system
After completing all the hydraulic connections, the circuit may be filled with water. After filling
the system, open the radiators air valves to get rid of the air in the installation.
Verify that the installation pressure is according to the technical feature of the boiler. The
pressure must be verified through the boiler’s manometer. An additional manometer should be
installed on the cold water inlet to verify the cold pressure, at the lowest point of the installation,
at a point close to the boiler.
The whole installation must remain under nominal pressure for at least 10 minutes. During this
period, check that all the connections are tight and there are no water leakages. Make sure that
during this period no pressure drop appears.
After firing the boiler, make sure the network functions properly at working temperature and
pressure.
The hardness of the mains water supply affects the boiler’s life span. It is
recommended to use a water softener if water hardness exceeds 15of.
Do not fill the system at the working pressure! When the boiler will be heated,
the water pressure will raise. Filling pressure must be at least 1 bar lower than
working pressure!
4.4. Chain thermostat installation
ECOTWIN boiler is equipped with air door on the lower part
and is delivered with chain thermostatic regulator.
Install the regulator at the connection pipe on the upper
side of the boiler and pass the chain through the hook
provided on the air door.
Choose the desired boiler temperature from the
thermostat head (red scale is valid).
The thermostatic regulator controls the boiler temperature
by controlling the supply of combustion air. The chain
length must be adjusted so that when the set temperature
is reached the air door is in closed position and no air is
supplied.

INSTALLATION
17
4.5. Connection diagrams
4.5.1. Open expansion vessel connection
Legend
1-9.
Separation valves
B
Hot water boiler
10,11.
Radiator valves
VED
Open expansion vessel
12.
Radiators
PCI
Central heating pump
13-15.
Safety valves
PRC
Recirculation pump
16.
Filling valve
RP
Pressure reducer
17.
Drainage valve
F
Filter
18.
Cold water valve
A
Air relief valve
19-24.
One-way valves
FD
Water softener
4.5.2. Closed expansion vessel connection
Legend
1-9.
Separation valves
B
Hot water boiler
10,11.
Radiator valves
VE
Closed expansion vessel
12.
Radiators
PCI
Central heating pump
13-15.
Safety valves
PRC
Recirculation pump
16.
Filling valve
RP
Pressure reducer
17.
Drainage valve
F
Filter
18.
Cold water valve
A
Air relief valve
19-24.
One-way valves
FD
Water softener

ELECTRICAL CONNECTIONS
18
5. ELECTRICAL CONNECTIONS
5.1. General instructions
All electrical connection must be performed by an authorized professional, in conformity with the
local regulations and the indications of this manual. Connections must be done according to
norms EN 60529 and EN 60335-1, and protection norms IP 40 and IP 44.
All wiring must be waterproof insulated. Exposed cables should be protected within plastic
channel. The main electrical supply of the boiler must be connected to an independent safety of
max 16A. The boiler room lighting must be on a separate circuit.
The user is obliged to connect the boiler to an efficient grounding system.
THERMOSTAHL ROMANIA SRL declines any liability for damage caused to
people, animals and goods, due to defects caused by faulty electrical
connections or lack of connecting the boiler to an efficient grounding system.
5.2. Electrical connection diagram
Do not connect the pumps to the controller, because when the burner will be
stopped on manual mode, they will not function!

CONTROLLER
19
6. CONTROLLER
6.1. General description
Description:
Diodes signalizing the status of outputs and the working mode of the driver,
LCD screen used for communication between the device and the user,
Buttons steering the driver's work.
6.2. Description of buttons
Button
Function
1
Changes the burner's working mode –“STOP”, “IGNITION”, “AUTOMATIC
WORK”.
2
Return to the previous menu
1
Entry on the Menu's parameters
2
Saves the change of a parameter
1
In the Ignition MODE activates the feeder for the time specified on the
parameter “Filling Feeder Time”
2
Go to the previous menu or parameter
Decreases the value of a parameter
1
In the Ignition MODE activates the ignition procedure
2
Go to the menu or parameter
Increases the value of a parameter του καυστήρα.

CONTROLLER
20
6.3. Operation functions
After switching the burner on, it is appeared on the LCD screen the program's logo defining the
type of the driver and the version of the current software
While activating, the burner carries out a test of the connected sensors. In case of one lacking,
on the screen appears an appropriate message (---). The work of the burner without a heating
water temperature sensor (CH) is blocked and an emergency mode is activated (CH pump is
still on).
Correct connection of sensors causes displaying of actual CH furnace's temperature and the
temperature of useful warm water of the WUW buffer (if the function is active). On the screen
appears which function is currently used by the driver.
The burner may work in three working modes (“STOP”, “IGNITION”, “AUTOMATIC WORK”).
The mode changes when the “MODE/ ” button is pressed. Activating the “STOP” mode is
possible in all modes after pressing the “MODE/ ” button for 3 seconds. When Stop is
activated, the burner goes at “Burning off” process (if there is fire) and the at “Cleaning”
process.
When the burner is activated for first time, it is on “Stop” mode. Every next time, its status is
saved in the regulator's non-volatile memory. Activating the driver again, automatically causes
switching on of the lately used working mode.
In the table beneath a short description of particular functions of the burner, activated
depending on the working mode of the driver, is shown.