Strebel Biotec 25 User manual

Ökotec 25
Aufstellungs- und
Bedienungsanleitung
Produktinformation
Biotec
Installation and user manual
Product information

Biotec
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2
Risk of electric shock
Works with parts marked with this symbol are only
to be carried out by an electrician. Text passages
with this symbol hold information about electric connections.
Caution
Working on parts marked with this symbol can cause
injury or material damage. Text passages with this
symbol hold information about safety precautions.
Possible hand injuries
Working on parts marked with this symbol can cause
hand injuries.
Fire hazard
Flammable items may not be positioned near the boi-
ler. Text passages with this symbol hold information
about fire prevention.
Danger of frost
Frost forming in the system pipes after a longer
period of downtime during the cold season can cause
severe damages. Text passages with this symbol hold information
about frost prevention.
Additional notices
Follow regional prescriptions on positioning, installation, operati-
on and disposal of the boiler.
Every person with the intend of operating the boiler is prescribed
to carefully read this manual. This applies especially for the sa-
fety informations. Even persons intending to clean the boiler or
perform other maintenance must read this manual. Otherwise, the
guaranty expires.
This manual is to be stored safely.
Safety information
Basics
The boiler must be installed by a competent professional. The Bio-
tec is produced according to current safety requirements. Incorrect
use can cause accidents, injury or even death of the user, if the
rules for safe use are ignored. This can also cause damages to the
boiler or to other items next to the boiler. The specialist respon-
sible for the implementation must explain the proper handling of
the boiler to the user. Only use the boiler if it is installed properly.
Always follow the instructions of this manual. Every boiler failure
must be fixed as soon as possible.
Use of the boiler
The manufacturer is not responsible for damages resulting from
an inappropriate use. In this case, the user is responsible.
The operation parameters can only be modified in the range
prescribed in this manual. The use of parameters outside the ran-
ge can cause damages or errors in the system.
Prescribed fuel
This boiler is designed for the combustion of wood pellets. The
use of other fuels is prohibited. Wood pellets are cylindrical and
made from wood scraps without additives or chemical binders. The
pellets must have specifical dimensions and a low moisture level.
STREBEL recommends pellets with a diameter of 6 to 8 mm and a
lenght of 10 to 30 mm. Quality and form are prescribed throughs-
te standards ÖNORM 7135 and DIN 51731. Only use pellets that
comply with ÖNORM, DIN or equal regional stadards. More infor-
mations in chapter 3.
Possible risks
Carbon monoxyde
During boiler operation, carbon monoxyde can issue
through the boiler doors. Only leave them open as
long as necessary. Insufficient vent during operation is critical.
Closing the vent of the boiler room or the boiler is prohibited.
Signs and symbols
Surfaces with high temperatures
Touching such surfaces can cause burns. Surfaces
marked with this symbol may only be touched when
the system is cooled down. Text passages with this symbol hold
information about hot boiler parts.
Safety information
marked with this symbol may only be touched when
Caution
injury or material damage. Text passages with this
Working on parts marked with this symbol can cause
hand injuries.
Flammable items may not be positioned near the boi-
ler. Text passages with this symbol hold information
Frost forming in the system pipes after a longer
period of downtime during the cold season can cause
through the boiler doors. Only leave them open as

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Contents
1 Boiler features................................................................................................................................ 4
2 Technical data ................................................................................................................................ 5
3 Fuel................................................................................................................................................. 7
4 Construction and funtion................................................................................................................ 8
5 Installation...................................................................................................................................... 9
6 Boiler controller.............................................................................................................................. 18
7 Phases of operation........................................................................................................................ 22
8 Maintenance .................................................................................................................................. 23
9 Possible malfunctions .................................................................................................................... 24
10 First start-up................................................................................................................................... 25
11 Disposal of the boiler..................................................................................................................... 26
Terminal connections ..................................................................................................................... 27

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1 Boiler features
1.1 General information
The boiler Biotec has a modern design and is made of high quality
material. The boiler testings were carried out conform to EN 303-
5, so the boiler fulfills all requirements for the connection to the
central heating system. The maximum permitted system pressure
is 2.5 bar.
This boiler is suitable as central heating system for single- or mul-
ti-family-homes, small businesses or workshops. The automatic
operation shows to be very user-friedly, because the only action
during operation is re-filling the pellet silo every day to every coup-
le of days, depending on the current output. The Biotec includes
the silo and pellet screw. The basic design of the boiler features
the silo on its right side. On request and for additional charge,
the silo can be mounted on the left side resp. a bigger silo can be
installed.
Pellets make an excellent fuel. Wood pellets are zylindrical and
made from wood sraps. The ash-percentage after the combustion
is especially low with pellets and accounts for about 1 %. The
caloric value of pellets is approx. 18000 kJ/kg, wich means that 2
kg pellets comply to 1 l light heating oil.
The storing qualities and the high energy value of pellets make
them the ideal replacement for oil or gas. Additionally, they are
produced from wood, a regional renewable source.
Boiler features
1.2 Conformity declaration
The company STREBEL confirms according to EN45014:1998 that
the boiler Biotec complies with the following standards:
EC-guidelines:
MD 98/37/EC
PED 97/23/EC
LVD 2006/95/EC
EMC 2004/108/EC
Harmonized standards:
EN 303-5:1999; EN 60204-1:2006; EN 60335-1:2002;
EN 50165:1997+A1; EN 61000-6-3:2001; EN ISO 12100-1:2003;
EN ISO 12100-2:2003; EN 1050:1997
Other standards and technical spezifications:
EN 287-1:2004, EN 288-3:1992; EN 10204:2004; EN ISO
7000:2004.
Used method for testing conformity: Modul B1
Grenzwert der Emission der Verbrennungsprodukte (Klasse) 3
Certificates: EC Control Type –Certifikate Nr. 0745/350/09
Responsible laboratory: TÜV Thüringen e.V. Service-Center
Südthüringen, Industriestr.13, D-98544 Zella-Mehlis
We hereby declare that the mentioned products were produced
under safety- and norm prescriptions, guidelines and standards.
All working conditions and terms of use comply with this manual.
In case the product is changed in a way we are not informed of,
this confirmation loses its validity.

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5
Biotec Technical data
2 Technical data
Pelletskessel Biotec 25 Biotec 25 S Biotec 40
Rated output kW 25 25 40
Minimum output kW 8 8 13
Flow-/Return temperature °C 90/70 90/70 90/70
Flue gas temperature at rated output °C 135 - 140
Minimum flue gas temperature °C 95 95 95
Flue gas volume flow at rated output kg/s 0,0176 - 0,0280
Flue gas volume flow at min. output kg/s 0,0079 - 0,0140
Efficiency % 88 91 85
Water volume l 70 74 118
Resistance on water side
t=10 K/t=20 K hPa 7/2 7/2 7/2
Weight kg 320 340 459
Boiler class N 303-5 3 3 3
Maximum operating/testing pressure bar 2,5/5 2,5/5 2,5/5
Maximum flue draft Pa 12 - 15
Connection flow/return inch 1 1 5/4
Exhaust connection diameter mm Ø 130 130 130
Pellet silo volume l 200 500 400
Maximum volume of silo
(extra charge) l 400 - -
Electric connection 230 V ~ 50 Hz (max. 1 A) 230 V ~ 50 Hz (max. 1 A) 230 V ~ 50 Hz (max. 1 A)
Power consumption
ignition/fan/screw motor W 400/41/50 400/41/50 400/41/50

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Technical data
2.1 Dimensions
Boiler diameters (mm)
Overall width (W) Depth (D) Height (H)
Diameter
exhaust
conn. (DE)
Boiler width
(W2)
Height
return (R)
Height
flow (F)
Centre
exhaust
conn. (HE)
Biotec 25 1275 (200 L silo) 905 1435 130 500 269 1132 1130
Biotec 25 S 1443 (500 L silo) 905 1630 130 500 269 1132 1330
Biotec 40 1645 (400 l silo) 1070 1660 130 708 254 1301 1330
Connections (inch)
R1 R2 R3
Biotec 25 1 1/2 3/4
Biotec 25 S 1 1/2 3/4
Biotec 40 5/4 1/2 3/4
D
W
W2
R
F
H
HE
Pellet silo dimensions (mm)
Silo volume W. H. D. Lid half-
height
Lid max
height
200 Litre 765 1350 650 - 1990
400 Litre
for Biotec 25 935 1350 750 1715 2100
400 Litre
for Biotec 40 935 1625 750 1990 2375
500 Litre 935 1545 750 1910 2295
DE

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Fuel
3 Fuel
3.1 Required fuel-quality
DIN 51731
Pellet-size HP5, made from by-products of wood and wood-
shavings, without additives. The energy value of 2 kg pellets com-
plies with the energy of 1 l light heating oil (10 kWh).
ÖNORM 7135
The Austrian standard comprises quality requirements of pellets,
testing regulations, supervision of pellet production and labelling.
DIN Plus
Standard DIN Plus combines Standard DIN 51731 and Standard
ÖNORM 7135. The certification procedure at the manufacturer‘s
works is carried out by the responsible certified DIN-inspector. The
quality of the pellets is supervised and checked regularly.
Standard DIN 51731 ÖNORM 7135 DIN Plus
Length mm max. 50 max. 5 x diameter max. 5 x diameter
Diameter mm 4-10 max. 10 max. 10
Chaloric value MJ/kg 17.5 - 19.5 min. 18 min. 18
Pellet density kg/m31 - 1.4 min. 1.12 min. 1.12
Pellet bulk density kg/m3min. 650 min. 650 n.a.
Water content % max. 12 max. 10 max. 10
Ash content % max. 1.5 max. 1.5 max. 0.5
Abraison of the pellets % n.a. max. 2.3 max. 2.3
Sulphur content % n.a. max. 0.04 max. 0.04
Nitrogen content % n.a. max. 0.3 max. 0.3
Chlorine content % n.a. max. 0.2 max. 0.2

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Construction and function
4. Construction and function
4.1 Construction
Construction of the boiler
Legend:
1 Burner
2 Heat exchanger w. turbulators
3 Pellet silo
4 Pellet screw
5 Gear motor
6 Case of heat exchanger
7 Case of burner
8 Fan
9 Combustion chamber door
10 Exhaust connection and exhaust probe
11 Cleaning lever
12 Controller panel
13 Ash drawer
14 Application box
15 Sight glas
4.2 Function
The application box (14) houses the main switch for turning the
boiler on and off. Boiler operation can be adjusted via push-
buttons on the controller panel (12). If the combustion process is
started, the gear motor (5) of the pellet screw (4) starts to run.
It conveys pellets from the silo (3) to the burner (1). Combustion
takes place in the combustion chamber and can be inspected via
the sight glass (15). The fan (8) provides primary and secundary
air for combustion. The pellet ash falls into the ash drawer (13)
through the openings of the combustion chamber floor. The turbu-
lator-spirals within the heat exchanger tubes (2) can be moved up
and down with the cleaning lever (11) to remove cloggings from
the inside of the tubes.
Caution! The combustion chamber door (9) must be closed during
boiler operation. The ash drawer and the combustion chamber may
only be touched and cleaned when the boiler has cooled down.
1
15
1314 9874
5
2
3 106 12 11

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9
A
BAB
Hydraulische
Weiche Rücklaufanhebung
Regumat RTA 130 DN 25
Netz 230 V / 50 Hz
Pelletskessel Biotec 25
Speicher
RTH
SF
SLP
HKP
RTH Raumthermostat
SF Speicherfühler
SLP Speicherladepumpe
HKP Heizkreispumpe
AG Ausdehnungsgefäss WW Warmwasser
KW Kaltwasser
Schemazeichnung, keine Gewähr auf Vollständigkeit
A
BAB
Rücklaufanhebung Regumat RTA 130 DN 25
Netz 230 V / 50 Hz
Pelletskessel Biotec 25
RTH
SLP
HKP
RTH Raumthermostat
SF Speicherfühler
PF Pufferfühler
SLP Speicherladepumpe
HKP Heizkreispumpe
AG Ausdehnungsgefäss WW Warmwasser KW Kaltwasser
Schemazeichnung, keine Gewähr auf Vollständigkeit
Pufferspeicher
PF
Sicherheitsgruppe
Kaltwasser
Brauchwassermischer
Warmwasser
KW
Speicher
SF
Sicherheitsgruppe
Kaltwasser
Brauchwassermischer
Warmwasser
KW
Connection scheme with domestic water tank
Installation
5 Installation
The installation of the boiler and other system components must be
carried out by qualified technicians.
5.1 Hydraulic scheme examples
Room thermostat Domestic water probe Tank charging pump Heating circuit pump Expansion vessel Hot water Cold water
Pellet boiler Biotec 25
Power supply 230 V/50 Hz
Return riser
Hydraulic compensator
Safety group cold water
Tank
Domestic water mixer Hot water
TCP
HCP
RTH DWP TCP HCP EV HW CW
CW
DWP
HW
EV

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10
Installation
Connection scheme with domestic water tank and compensator tank
A
BAB
Hydraulische
Weiche Rücklaufanhebung
Regumat RTA 130 DN 25
Netz 230 V / 50 Hz
Pelletskessel Biotec 25
Speicher
RTH
SF
SLP
HKP
RTH Raumthermostat
SF Speicherfühler
SLP Speicherladepumpe
HKP Heizkreispumpe
AG Ausdehnungsgefäss WW Warmwasser
KW Kaltwasser
Schemazeichnung, keine Gewähr auf Vollständigkeit
A
BAB
Rücklaufanhebung Regumat RTA 130 DN 25
Netz 230 V / 50 Hz
Pelletskessel Biotec 25
RTH
SLP
HKP
RTH Raumthermostat
SF Speicherfühler
PF Pufferfühler
SLP Speicherladepumpe
HKP Heizkreispumpe
AG Ausdehnungsgefäss WW Warmwasser KW Kaltwasser
Schemazeichnung, keine Gewähr auf Vollständigkeit
Pufferspeicher
PF
Sicherheitsgruppe
Kaltwasser
Brauchwassermischer
Warmwasser
KW
Speicher
SF
Sicherheitsgruppe
Kaltwasser
Brauchwassermischer
Warmwasser
KW
Room thermostat Domestic water probe Compensator tank probe Tank charging pump Heating circuit pump Expansion vessel Hot water Cold water
RTH DWP CP TCP HCP EV HW CW
Pellet boiler Biotec 25
Power supply 230 V/50 Hz
Return riser
Compensator tank
TCP
HCP
EV
Safety group cold water
Tank
Domestic water mixer Hot water
CW
HW
DWP
CP

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11
Connection scheme with domestic water tank and compensator tank
Installation
A
BAB
Rücklaufanhebung Regumat RTA 130 DN 25
Netz 230 V / 50 Hz
Pelletskessel Biotec 25
RTH
RTH Raumthermostat
AG Ausdehnungsgefäss
Schemazeichnung, keine Gewähr auf Vollständigkeit
A
BAB
Rücklaufanhebung
Regumat RTA 130 DN 25
Netz 230 V / 50 Hz
Pelletskessel Biotec 25
Ceta 106 Regelgerät
Ceta RC Raumgerät VF Vorlauffühler
AF Aussenfühler
PF Pufferfühler MIMO Mischermotor MKP Mischerkreispumpe
AG Ausdehnungsgefäss WW Warmwasser KW Kaltwasser
Schemazeichnung, keine Gewähr auf Vollständigkeit
Speicher im Speicher System
PF
Ceta 106 Ceta 106
VF VF
Ceta RC Ceta RC
AF
MKP
MIMO
MKP
MIMO
Sicherheitsgruppe Kaltwasser
Brauchwassermischer
Warmwasser
Connection scheme with room thermostat
Return riser
EV
Room thermostat Expansion vessel
RTH EV
Pellet boiler Biotec 25
Power supply 230 V/50 Hz

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in construction and dimensions expected.
12
Installation
A
BAB
Rücklaufanhebung Regumat RTA 130 DN 25
Netz 230 V / 50 Hz
Pelletskessel Biotec 25
RTH
RTH Raumthermostat
AG Ausdehnungsgefäss
Schemazeichnung, keine Gewähr auf Vollständigkeit
A
BAB
Rücklaufanhebung
Regumat RTA 130 DN 25
Netz 230 V / 50 Hz
Pelletskessel Biotec 25
Ceta 106 Regelgerät
Ceta RC Raumgerät VF Vorlauffühler
AF Aussenfühler
PF Pufferfühler MIMO Mischermotor MKP Mischerkreispumpe
AG Ausdehnungsgefäss WW Warmwasser KW Kaltwasser
Schemazeichnung, keine Gewähr auf Vollständigkeit
Speicher im Speicher System
PF
Ceta 106 Ceta 106
VF VF
Ceta RC Ceta RC
AF
MKP
MIMO
MKP
MIMO
Sicherheitsgruppe Kaltwasser
Brauchwassermischer
Warmwasser
Connection scheme with tank-in-tank system and 2 heating circuits
Pellet boiler Biotec 25
Power supply 230 V/50 Hz
Controller Room remote controller Flow probe Outside probe Compensator tank probe Mixer motor Mixer circuit pump Expansion vessel Hot water Cold water
Ceta 106 Ceta RC FP OP CP MMO MCP EV HW CW
Return riser
HW
FP
FP
MCP MCP
EV
OP
Safety group cold water
Tank-intank system
Domestic water mixer Hot water
CW
CP

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in construction and dimensions expected.
13
Installation
A
BAB
Rücklaufanhebung
Regumat RTA 130 DN 25
Netz 230 V / 50 Hz
Pelletskessel Biotec 25
Ceta 106 Regelgerät Ceta RC Raumgerät
VF Vorlauffühler AF Aussenfühler
PF Pufferfühler MIMO Mischermotor MKP Mischerkreispumpe
AG Ausdehnungsgefäss
FRIWA Frischwassermodul
WW Warmwasser KW Kaltwasser
Schemazeichnung, keine Gewähr auf Vollständigkeit
Ceta 106 Ceta 106
VF VF
Ceta RC Ceta RC
AF
MKP
MIMO
MKP
MIMO
KW WW
FRIWA
PF
A
BAB
Rücklaufanhebung Regumat RTA 130 DN 25
Netz 230 V / 50 Hz
Pelletskessel Biotec 25
Ceta 106 Regelgerät
Ceta RC Raumgerät VF Vorlauffühler AF Aussenfühler PF Pufferfühler MIMO Mischermotor MKP Mischerkreispumpe AG Ausdehnungsgefäss WW Warmwasser KW Kaltwasser
Schemazeichnung, keine Gewähr auf Vollständigkeit
Ceta 106 Ceta 106
VF VF
Ceta RC Ceta RC
AF
MKP
MIMO
MKP
MIMO
PF
Kombipufferspeicher
Brauchwassermischer
Warmwasser
Brauchwasser- Ausdehnungsgefäss
Sicherheitsgruppe Kaltwasser
Sicherheitsgruppe
Kaltwasser
Connection scheme withcompensator tank, 2 heating circuits and freshwater-module
Cobtroller Room remote controller Flow probe Outside probe Compensator tank probe Mixer motor Mixer circuit pump Expansion vessel Fresh water module Hot water Cold water
Ceta 106 Ceta RC FP OP CP MMO MCP EV FREWA HW CW
FREWA
CW HW
CP
Safety group cold water
Pellet boiler Biotec 25
Power supply 230 V/50 Hz
Return riser
FPFP
MCP MCP
EV

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in construction and dimensions expected.
14
A
BAB
Rücklaufanhebung
Regumat RTA 130 DN 25
Netz 230 V / 50 Hz
Pelletskessel Biotec 25
Ceta 106 Regelgerät Ceta RC Raumgerät
VF Vorlauffühler AF Aussenfühler
PF Pufferfühler MIMO Mischermotor MKP Mischerkreispumpe
AG Ausdehnungsgefäss
FRIWA Frischwassermodul
WW Warmwasser KW Kaltwasser
Schemazeichnung, keine Gewähr auf Vollständigkeit
Ceta 106 Ceta 106
VF VF
Ceta RC Ceta RC
AF
MKP
MIMO
MKP
MIMO
KW WW
FRIWA
PF
A
BAB
Rücklaufanhebung Regumat RTA 130 DN 25
Netz 230 V / 50 Hz
Pelletskessel Biotec 25
Ceta 106 Regelgerät
Ceta RC Raumgerät VF Vorlauffühler AF Aussenfühler PF Pufferfühler MIMO Mischermotor MKP Mischerkreispumpe AG Ausdehnungsgefäss WW Warmwasser KW Kaltwasser
Schemazeichnung, keine Gewähr auf Vollständigkeit
Ceta 106 Ceta 106
VF VF
Ceta RC Ceta RC
AF
MKP
MIMO
MKP
MIMO
PF
Kombipufferspeicher
Brauchwassermischer
Warmwasser
Brauchwasser- Ausdehnungsgefäss
Sicherheitsgruppe Kaltwasser
Sicherheitsgruppe
Kaltwasser
Installation
Connection scheme with combined compensator tank and 2 heating circuits
Controller Room remote controller Flow probe Outside probe Compensator tank probe Mixer motor Mixer circuit pump Expansion vessel Hot water Cold water
Ceta 106 Ceta RC FP OP CP MMO MCP EV HW CW
HW
HW
CP
CW
EV
EV
Safety group cold water
Combined compensator tank
Domestic water mixer Hot water
Domestic water expansion vessel
Pellet boiler Biotec 25
Power supply 230 V/50 Hz
Return riser
FP
FP
MCP MCP
OP

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in construction and dimensions expected.
15
Installation
A
BAB
Rücklaufanhebung
Regumat RTA 130 DN 25
Netz 230 V / 50 Hz
Pelletskessel Biotec 25
SLP
Schemazeichnung, keine Gewähr auf Vollständigkeit
Pufferspeicher
PF
Speicher
SF
Sicherheitsgruppe
Kaltwasser
Brauchwassermischer
Warmwasser
KW
Ceta 106
VF
Ceta RC
AF
MKP
MIMO Ceta 106 Regelgerät
Ceta RC Raumgerät VF Vorlauffühler AF Aussenfühler SF Speicherfühler
PF Pufferfühler
MIMO Mischermotor
MKP Mischerkreispumpe
AG Ausdehnungsgefäss WW Warmwasser
KW Kaltwasser
Connection scheme with combined compensator tank, 1 heating curcuit and DW-circuit
Pellet boiler Biotec 25
Power supply 230 V/50 Hz
Return riser
FP
FP
MCP MCP
EV
CW
CP
DW-tank
OP
HW
DP
Domestic water mixer Hot water
Controller Room remote controller Flow probe Outside probe Domestic water tank probe Compensator tank probe Mixer motor Mixer circuit pump Expansion vessel Hot water Cold water
Ceta 106 Ceta RC FP OP DP CP MMO MCP EV HW CW
Safety group cold water
Compensator tank

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5.2 Installation place and chimney
The boiler must be installed near a chimney. It is prohibited to
close air vents.
WARNING!
1.) The boiler must be placed on a solid and stable floor.
2.) The installation must be carried out by qualified technicians.
3.) The boiler room must be equipped with water- and grounded
electrical connection. A waste water draw-off is advantage-
ous.
4.) The boiler room must be vented in a sufficient way.
5.) Floor, walls, ceiling, door and equipment of the room must be
made of non-flammable material.
Installation
Additional notes:
1.) Humidity should be kept at a low level to avoid corrosion of
metal parts.
2.) For the filling of the boiler we advise to use soft water.
3.) The circulation pump must not operate before the heating
system is completely filled with water. The system must be
bled.
4.) When connecting the boiler to the flue it is necessary to put
the flue pipe inhorizontally or vertically. All connections
must be sealed up properly.
5.) Before the first start-up, check the position of the chamotte
bricks to make sure they fit correctly and were not shifted
during transportation of the boiler.
6.) The chimney must be layed out according to diagram below.
An insufficient flue draft holds a fire risk. In that case, the fire
can spread from the burner on to the screw and the pellets in the
silo.
Rated output [kW]
Chimney height [m]
Rated output [kW]

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17
Installation
Examples of correct chimney installation
5.3 Connection of the boiler parts
Connect the electric wire of the pump to the power supply. (max.
current 1 A).
Connection of the controller
Connect the electric wire of the controller to the power supply.
The installation of the electric accessories of the boiler needs a
power supply with 230 V/50 Hz.
Connection of the room thermostat
A room thermostat can be connected to the controller. Before star-
ting up the boiler, check the following:
1.) Water pressure in boiler and system.
2.) System must be bled.
3.) The wires of the boiler are installed correctly, undamaged
and not touching surfaces that heat up during operation.
4.) The chamotte-bricks are correctly positioned in the burner.
5.) The pellet silo is properly clean.
A certified safety valve (2.5 bar) and an expansion vessel must
be installed in the heating system. Do not install other valves
between the safety valve and the vessel. The return temperature
must not fall below 60 °C to prevent the build of condensate in-
side the boiler.
Installation scheme of the thermo-chamotte-bricks
inside the burner.
To prevent system freeze or if the boiler will not be
used for a longer period of time, we advise to fill the
system with a an antifreeze or to drain the system.
To prevent system freeze or if the boiler will not be
used for a longer period of time, we advise to fill the
system with a an antifreeze or to drain the system.
5.3 Connection of the boiler parts

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6.2 Basic display
In the line „Boiler operation phase“ (13), information about the
current phase of boiler operation (Boiler OFF, First ignition-phase,
Combustion-phase, Cool-down phase, Room thermostat OFF, etc.)
The symbol „Boiler operation“ shows if the boiler is active or not.
If the boiler is set to run in a pre-programmed operation mode, the
display shows „TIME“.
The symbols in the bottom line show the operational availability
of the controller outputs resp. if the elemets (fan, pump, screw,
ingniter, boiler pump) are active or not. If the symbol shows, that
component is active.
Boiler controller
6 Boiler controller
6.1 Control panel
The controller is used for regulating the pellet boiler operation.
The design of the control panel is shown in the scheme below:
The controller has an LCD display and 6 buttons on the right side
of the display.
Functions of the buttons
Increase of parameter values
Escape, boiler power off
Browse menu – go back
Browse menu – go forward
Decrease of parameter values
Enter, confirm selected parameter
Inputs
- Boiler probe (Pt 1000)
- Flue gas probe (Pt 1000)
- Domestic water probe (NTC, 10 kΩ)
- Compensator tank probe (NTC, 10 kΩ)
- Room thermostat
- Input – GSM controller
Outputs
- Ignition electrode (relay, 8A, NO)
- Pellet screw (relay, 5A, NO)
- Fan (PWM)
Legend
1 Time
2 Boiler operation
3 DW-tank temperature
4 Fan activated
5 Pump
6 Pellet screw
7 Ignition electrode
8 Boiler pump
9 Preset power output
10 Flue gas temperature
11 Current boiler temperature (desired)
12 Program
13 Boiler operation phase
1
2
3
4
5 6 7 8
10
9
11
12
13

Biotec
Typographical and printing errors, changes
in construction and dimensions expected.
19
6.5 Automatic operation
To set the hours of operation for the automatic operation, press
the button for about 2 seconds. The weekday can be selected
by pressing or . To change the operating hours for the
selected day, press the enter button.
The display shows two rows of each two time-sets, the first is the
start of operation, the second is the time for operation stop. In the
example below, the boiler starts up at 06:00 am and deactivated
at 04:00 pm. After a pause, operations starts again at 07:00 pm
and stops at 10:00 pm. Then the boiler is deactivated until the next
day. The operation times can be set individually for every day of
the week.
The values can be changed with the buttons and and con-
firmed with the enter button. After confirming, the selection shifts
ahead one position.
After all four sets are confirmed, the display shows „COPY“. If this
is confirmed with the enter button, the settings are copied to the
next day. Pressing the escape button leads to the settings for the
next weekday, without copying the changes.
Boiler controller
6.3 Start and stop of the boiler
To start the boiler, activate the red main switch on the right side
of the boiler. After activation, the boiler controller turns on and
shows the basic display. To start boiler operation, press the enter
button for about 2 seconds. The display shows „ON“ and the
boiler switches into the pre-pulse phase with maximum fan power.
To switch to automatic operation, the enter button is again pressed
for about 2 seconds. Then, the display shows „TIMER PROGRAM
BOILER“.
To shut down the boiler, the escape button is pressed for
about 2 seconds until the display shows „OFF“. The boiler swit-
ches to the cool-down phase with decreased fan power. To deac-
tivate the boiler, the escape button is again pressed for about 2
seconds. By deactivating the main switch, the boiler is powered
down completely.
6.4 Setting of time and date
For the setting of date and time the button is pressed for
about 2 seconds.
The current selection can be changed with the buttons and
. With the enter button, the selection is confirmed and shifts
ahead one position. The seconds can not be set. When all posi-
tions are set, the user reaches the basic display. To escape the
setting without making changes, press the escape button.

Biotec
Typographical and printing errors, changes
in construction and dimensions expected.
20
4.) POWER:
The large position in the middle shows the set power stage. The
row below shows the set values of the Operating duration of
screw (R), the Pausing duration of screw (P) and the - Fan-power
during heating operation (V).
P1: Minimum output operation
P2: Intermediate output operation
P3: Maximum output operation
5.) Switching between summer- and winter-mode
In summer-mode, the boiler only produces heat for domestic
water.
6.6 Operation parameters
The following parameters are relevant for boiler operation, pellet
combustion, and flue gas temperature. The parameters are set by
the technician before the first start-up (see 6.7). The operation pa-
rameters are displayed by pressing the button in the basic
display.
Press the buttons or to set the value for the selected pa-
rameter. Press the escape button to go back to the basic display.
Press the enter button to confirm the selection.
1.) Boiler temperature rated value:
2.) Tank temperature rated value:
3.) DOMESTIC WATER:
Boiler controller