SENKO SG-90 User manual

Solid fuel
COOKERS
SG-75 and SG-90
SN-EN-04/14

SENKO cookers SG-75 and SG-90 –Instruction manual 1
Dear client, thank you for choosing a SENKO cooker !
This product was designed and manufactured to its minutest
details in order to fulfill your every need for functionality and
safety.
This Instruction manual will teach you to operate your cooker
properly, so please read the manual carefully before using the
cooker.
Senko management
Symbols used in this INSTRUCTION MANUAL :
ATTENTION WARNING
SAFETY ADVICE AND RECOMMENDATIONS

SENKO cookers SG-75 and SG-90 –Instruction manual 2
CONTENTS
1. GENERAL .............................................................................................4
1.1. FUEL ................................................................................................6
1.2. FEEDING ..........................................................................................6
1.3. CHIMNEY ..........................................................................................7
1.3.1. CHIMNEY CAP ...........................................................................7
1.3.2. CHIMNEY FUNCTION ..................................................................8
1.4. INSULATION ...................................................................................10
2. WARNINGS AND SAFETY .................................................................10
3. TECHNICAL FEATURES ....................................................................11
4. INSTALLATION ...................................................................................13
4.1. POSITIONING .................................................................................13
4.2. CHIMNEY PREPARATION AND CONTROL........................................14
4.3. CONNECTING TO CHIMNEY ............................................................14
4.4. FRESH AIR VENTS..........................................................................17
4.5. OVEN THERMOMETER....................................................................17
4.6. INSTALLATION TESTING ................................................................17
5. HANDLING THE PRODUCT ...............................................................18
5.1. DIRECTING THE FLUE GAS ............................................................18
5.2. AIR ADJUSTMENT AND REGULATION..............................................19
5.3. FIREBOX GRATE.............................................................................20
5.4. FIRING ............................................................................................21
5.4.1. PROCEDURE ...........................................................................21
5.4.2. OPTIMUM USE VALUES .............................................................21
5.4.3. ADDING FUEL ..........................................................................22
5.4.4. FEEDING IN TRANSITION PERIOD ...............................................23
5.5. OVEN DOOR ...................................................................................23
5.6. FUEL BOX.......................................................................................24
5.7. HEIGHT ADJUSTMENT ....................................................................25

SENKO cookers SG-75 and SG-90 –Instruction manual 3
6. CLEANING ..........................................................................................25
6.1. CLEANING THE FLUE GAS CHANNEL .............................................26
7. MAINTENANCE ..................................................................................27
7.1. OLD COOKER DISPOSAL.................................................................27
7.2. SPARE PARTS.................................................................................27
8. MALFUNCTIONS / CAUSES / SOLUTIONS ......................................28
9. TECHNICAL SUPPORT ......................................................................29
10. TECHNICAL DATA .............................................................................30
11. TERMS OF WARRANTY ....................................................................31
WARRANTY ..............................................................................................32
INSTALLATION REPORT .........................................................................33
CE MARKING ............................................................................................34

SENKO cookers SG-75 and SG-90 –Instruction manual 4
1. GENERAL
Classical solid fuel cookers
E2375L SG-75 inox
E2375D SG-75 inox
E2190L SG-90 inox
E2190D SG-90 inox
are models from the SENKO cookers palette which can accommodate your
needs in the best possible way. Therefore, we ask you to CAREFULLY
READ THESE INSTRUCTIONS, which will help you to achieve the best
possible results already during the initial use.
The manufacturer is not responsible for any consequences (people
or animal injuries or property damages) resulting from failure to comply
with this Manual.The cooker is hot during operation and the use of
protective heat insulated gloves is compulsory during handling.
Children and infirm individuals are not allowed to handle the cooker.
The external appearance of the cooker is shown on the first page of this
Manual. Cooker principal parts are made of stainless steel boiler plates and
castings of quality grey cast. The cookers are produced with flue gas
connection point on the left or the right side. When ordering the cooker or
the spare parts, it is necessary to state its full designation, for
example: cooker E2375D SG-75 inox lux; which means that the flue gas
connection is on the right side, if the stove is observed frontally.
The cookers are manufactured and certified in accordance with the EN
12815 standard and comply with all the requirements set by this standard.
These SENKO cookers are intended for cooking, baking and space
heating !

SENKO cookers SG-75 and SG-90 –Instruction manual 5
22
23
24
figure 1
The cooker is packaged in a EURO pallet. During transport, the cooker
must be properly fastened in order to prevent tumbling or damages. The
standard delivered cooker set consists from:
cooker,
instruction manual,
chimney terminal extension (22),
cooker cleaning tool (23),
CF agent for removal of soot and grease from glass surfaces (24).
CAUTION! The cooker weighs between 130 and 200 kg. Extra
caution is necessary when unloading, transferring, moving and
installing the cooker in order to avoid physical injury.

SENKO cookers SG-75 and SG-90 –Instruction manual 6
1.1. FUEL
The use of moist and low-calorie wood is not recommended. The wood
moisture must be lesser than 17%. The energy content of moist wood is
low, at approx. 2,3 kWh/kg and it greatly pollutes the door glass, as well as
the chimney and the cooker.
Use only recommended fuel :
wood: common beech, common hornbeam, oak, black locust
air dried for a minimum of 2 years
relative humidity 15-17%, energy content at approx. 4,2 kWh/kg
wood briquettes: energy content at approx. 4,4 kWh/kg
1.2. FEEDING
manually when necessary
we recommend the logs to be of 50 x 50 mm vertical cut, up to 2/3
of the firebox length
use smaller logs for a more intensive fire, and more massive logs to
maintain fire
the minimum distance between the logs must be 1 cm, the same
distance of 1 cm applies for the briquettes
to maintain constant oven temperature, add smaller quantities of
fuel occasionally approx. 0,5 kg
it is necessary to use protective heat insulated gloves when
adding fuel to the firebox
protective heat insulated gloves must also be used when opening
and closing the oven and firebox door and removing the tray from
the oven and ash box

SENKO cookers SG-75 and SG-90 –Instruction manual 7
1.3. CHIMNEY
The cooker is connected to the chimney via 120 mm diameter sliding
rosette. It is necessary to execute the connection of the rosette and the
chimney tightly and impermeably. If the cooker is separated from the
chimney opening (not recommended) the connection is made via
standard 120 mm diameter smoke venting pipe.
We also advise to equip the chimney with solid material and
possible condensation products collection chamber and to install the
chamber in question beneath the smoke channel inlet, in a manner which
allows easy access and inspection via impermeable door.
1.3.1. CHIMNEY CAP
Chimney cap must fulfil the following prerequisites:
identical internal cross-section to that of the chimney,
operational exit cross-section no less than the double inner
cross-section of the chimney,
constructed to prevent rain, snow, leaves and other foreign
bodies from entering the chimney,
constructed to enable expulsion of combustion products in
case of wind from any direction and incline,
installed to enable proper dispersion and dilution of
combustion products outside the reflux zone (backflow)
because the counter pressure occurs here. Therefore, it is
necessary to adhere to limitations listed in figure 2,
mechanical appliances for flue gases suction are not allowed.

SENKO cookers SG-75 and SG-90 –Instruction manual 8
1.3.2. CHIMNEY FUNCTION
Among all the meteorological and geographical factors that influence the
chimney function (rain, fog, snow, insolation period, etc.) the wind is most
certainly the crucial one. Apart from the pressure caused by the
temperature difference between the flue gases and the outer chimney air,
there is another type of pressure –wind dynamic pressure.
Roof
slope
Distance between the
roof ridge and the
chimney
Minimum chimney height
(measured from the roof
surface)

A, m
Hmin, m
15°
< 1,85
0,5 m above the roof ridge
> 1,85
1 m from the roof
30°
< 1,5
0,5 m above the roof ridge
> 1,5
1,3 m from the roof
45°
< 1,3
0,5 m above the roof ridge
> 1,3
2 m from the roof
60°
< 1,2
0,5 m above the roof ridge
> 1,2
2,6 m from the roof
figure 2
FLAT ROOF
PITCHED ROOF
Z=REFLUX ZONE

SENKO cookers SG-75 and SG-90 –Instruction manual 9
Ascending wind ALWAYS has the effect of increasing the pressure,
i.e., underpressure (flue draught), provided the chimney is properly
installed. Descending wind ALWAYS has the effect of decreasing the
draught overpressure occurs. Apart from wind direction and velocity,
chimney position in relation to the house roof and surrounding area is also
important (figure 3).
The wind also influences the chimney function indirectly by creating
areas of high (overpressure) and low (underpressure) pressure, both inside
and outside the residential area (figure 4).
Pressure that facilitates chimney function can occur in rooms directly
exposed to the wind (B), but it can also adversely affect the chimney
through external pressure if the chimney is situated on the side exposed to
wind (A). Contrary to that, underpressure can occur in lee rooms (C),
adversely affecting functions of the chimney situated on the opposite side
(D) from the wind direction.
figure 3
wind
Unfavorable
position
Favorable
position
Horizontal wind 8 m/s
underpressure of
30 Pa
Descending wind under
45  angle and 8 m/s 
overpressure of 17 Pa
High (positive)
pressure zone
OVERPRESSURE
Low (negative)
pressure zone
UNDERPRESSURE
Flue
gases
from the
cooker

SENKO cookers SG-75 and SG-90 –Instruction manual 10
1.4. INSULATION
Cooker is to the outer surfaces isolated with chamotte plates 20 mm
thick. The sides are chamber derived and cooled with the natural air
circulation. The depth of the chamber is 25 mm. Other parts of the cooker
interior are lined with chamotte brick, 40 mm thick.
2. WARNINGS AND SAFETY
When connecting the cooker to the chimney, adhere to national and
European norms and local regulations.
Prior to use, verify with the local authorized chimney-sweeper whether
the cooker is properly connected to the chimney (the chimney-sweeper
must complete the installation report at the end of this Manual).
Special attention must be paid that there is enough air for combustion
being supplied to the room cooker is installed in.
Descending
wind
wind
A
B
C
D
figure 4
A-B zones in overpressure
C-D zones in underpressure

SENKO cookers SG-75 and SG-90 –Instruction manual 11
3. TECHNICAL FEATURES
SG-75 and SG-90 SENKO cookers are intended for cooking, baking and
household heating. They are equipped with an oven just like the traditional
kitchen cooker. Cookers are suitable for installation between other kitchen
appliances without heating risks.
They are made of stainless steel boiler plates and castings of
quality grey casts. The boiler is made of 5 mm thick boiler plate. The
cooking plate (1) is made of 8 mm thick fireproof plate. Cooker interior is
lined with chamotte and chamotte plates.
The fuel box (12) is on the frontal side, at the bottom, just above the
manual primary air regulator (10) and the ash box (11). Above them is a
firebox (6) with a movable grate (16) and the oven (7) with door and
thermometer (18).
Also, the cooker is on the front equipped with two handles, one serves
as a flue gas deflector (14) and is located on the side where is the chimney
connection point, while the other (15) serves as a lever for moving the
firebox grate (16).
The following figure display the schematic of the cookers and their
accompanying parts.

SENKO cookers SG-75 and SG-90 –Instruction manual 12
9. Cleaning hatch lid
10. Primary air manual regulator
11. Ash box
12. Fuel box
13. Chimney connection point
14. Flue gas deflector
15. Handle for grate moving
16. Movable grate
17. Oven door glass
18. Oven thermometer
SCHEMATIC DISPLAY FOR SG COOKERS
THE KEY :
1. Cooking plate
2. Frame
3. Cooker base with screws for
height adjustment
4. Cooker housing
5. Lower door
6. Firebox door
7. Oven with door
8. Oven door hinge
19. Door hinge bolt
20. Firebox door glass
21. Primary air inlet hatch
22. Chimney connection point
extension
23. Cooker cleaning tool
24. CF agent for removal of soot
and grease from glass
surfaces
figure 5
LEFT COOKER SG
- view from the side
RIGHT COOKER SG
- view from the side

SENKO cookers SG-75 and SG-90 –Instruction manual 13
4. INSTALLATION
Once you have removed packaging from the cooker, it is necessary to
make a detailed inspection in order to determine any potential
damages that might have occurred during transport. Nay detected
damages must instantly be reported to the manufacturer.
In places of any connection points on the cooker (chimney, air inlet),
inspection hatches must be installed for system maintenance and
servicing purposes.
4.1. POSITIONING
A spirit level must be used to place the cooker in a horizontal
position with no incline. It is necessary to ensure the minimum distance
of the cooker from any flammable objects; such as wood, chipboard,
cork and similar. If the materials are easily combustible such as PVC,
polyurethane and similar, the necessary safety distances need to be
doubled.
The minimum distance from any flammable surfaces is 1000 mm
above and 800 mm in front of the cooker, and 200 mm in all other
directions.
When mounting the cooker on the floor made from easily combustible
material (wooden floors), the cooker must be mounted on an insulating
noncombustible surface, 60 mm thick. The surface must cover the layout
area of 800 mm in front of the cooker and 400 mm in all other directions.
It is explicitly RECOMMENDED by the manufacturer to place the
cooker as close as possible to the chimney hole, i.e. next to the
chimney hole itself in order to avoid using an additional smoke uptake
pipe. If the additional smoke uptake pipe is not used, maximum
efficiency of the cooker, i.e. fuel is additionally assured !

SENKO cookers SG-75 and SG-90 –Instruction manual 14
4.2. CHIMNEY PREPARATION AND CONTROL
Prior to cooker mounting, it is necessary to check the chimney –the
diameter, height, possible clogging or damages. The chimney must be
certified by an authorized local chimney-sweeper. The effective
chimney height must be at least 5 meters from the point of flue gases
outlet (figure 6b).
Flue draught must be within parameters 12 ± 2 Pa.
The chimney must be at least 0,5 meters above the roof ridge. The
minimum distance between the two connections on the same chimney
must be 60 cm (figure 6d).
Chimney diameter is chosen according to information provided by the
chimney manufacturer –e.g., for flue draught of 12 Pa, the diameter is
usually 130 mm.
The chimney must be smooth on the inside, well insulated and well
fastened. All cleaning hatches must be well fastened. All gaskets must be
regularly inspected and replaced when necessary.
4.3. CONNECTING TO CHIMNEY
When connecting the cooker to the chimney it is necessary to adhere to
local, national and European regulations (norms) –DIN 4705.
It is necessary to ensure that the connection between the cooker and
the chimney is executed tightly and impermeably. Smoke outlet pipe
must have a suitable incline in cases where the cooker is removed
from the chimney opening.
Smoke outlet pipe must not penetrate into the chimney clear
opening (figure 6c).
Differences between the proper and improper connection of the cooker
to the chimney are displayed in the following figure.

SENKO cookers SG-75 and SG-90 –Instruction manual 15
figure 6
Differences between the proper and improper connection of the cooker to the chimney
PROPER
IMPROPER

SENKO cookers SG-75 and SG-90 –Instruction manual 16
odvijačem skinite
zaštitni poklopac
remove the cover on the side of
unscrewing the 4 screws for sheet metal
remove the following cover by
pressing the weakest connection
odvijačem skinite unutarnji
zaštitni poklopac
figure 7
do the same on the outside
and inside sheet
at the end, install
sliding rosette in
place as required
(side or rear), and
adjust the height
and tighten the
screw the outer
rosette
Connect the cooker to the chimney using a sliding rosette, 120 mm in
diameter. Specially designed sliding rosette enables the adjustment of the
chimney opening in tolerance of 1,5 cm upwards, i.e. downwards.
In case it is necessary to keep the cooker removed from the chimney
opening, use the standard smoke outlet pipe, 120 mm in diameter. It is not
allowed to reduce the prescribed pipe diameters !
If the cooker is further removed from the chimney opening, it is
connected via extension tube and an elbow. The extension smoke inlet
pipe must have an appropriate incline and must not exceed 125 cm in
length. The connection of the chimney and the smoke inlet pipe must be
completely fastened !

SENKO cookers SG-75 and SG-90 –Instruction manual 17
4.4. FRESH AIR VENTS
The room where the cooker is installed must be provided with
sufficient air inflow to ensure combustion. The area must be regularly
ventilated.
The fresh air vent must be situated near the room floor and allow the
inflow of fresh air into the room. The minimum dimension of the vent
must be 6 cm2per kW of nominal power (e.g. for 30 kW 180 cm2
10 x 18 cm vent).
A pipe can also be installed on the existing opening (21) on the rear side
of the cooker for the purpose of entering fresh outside air.
4.5. OVEN THERMOMETER
Thermometer (18) indicates the oven temperature; this value is
informative. If the oven temperature exceed 300 C, the oven must be
partly opened to prevent damage to the thermometer, oven door hinge
and oven door.
The warranty will be void in case the damage to the parts listed before
occurred from excessive oven temperature.
4.6. INSTALLATION TESTING
Prior to initial firing it is necessary to check if the smoke uptake pipe is
properly fastened.
Orijentacijska shema spajanja štednjaka C-25 i C-35 na sustav centralnog grijanja s termičkim dvoputnim sigurnosnim ventilom

SENKO cookers SG-75 and SG-90 –Instruction manual 18
closed flue gas deflector (14)
open flue gas deflector (14)
flue gas
deflector (14)
5. HANDLING THE PRODUCT
holding the cooker frame is not allowed while handling the appliance !
5.1. DIRECTING THE FLUE GAS
Flue gas deflector (14) accelerates the expulsion of flue gas from the
cooker when this is necessary. It is primarily used during initial stages of
firing or when larger quantities of fuel are added into the firebox.
Flue gas deflector (14) can also be used to regulate the oven
temperature (7) if the flue gas deflector is opened (pulled outwards),
the oven is cooling.
slika 12
figure 8

SENKO cookers SG-75 and SG-90 –Instruction manual 19
5.2. AIR ADJUSTMENT AND REGULATION
CHIMNEY
If the chimney is equipped with a vent damper, it must be adjusted to keep
the chimney flue draught within the limitations 12 ± 2 Pa.
PRIMARY AIR
Primary air is the air that flows directly through
the firebox grate. There is a manual primary air
regulator (10) between the fuel box (12) and oven (7).
Turning the PVC wheel of the manual regulator
regulates primary air flow. Regulator is set in
accordance with the desired temperature in the
cooking plate or oven. The division ranges from min
(minimum slit) to max (maximum slit) :
min manual regulator is closed and there is no primary air flow,
max primary air opening is completely open and the flow is at its
maximum.
There is a rectangular connection point
for the intake of external primary air on the
cooker rear side, onto which a rectangular
pipe (21), dimensions 110 x 55 mm, can be
connected.
If necessary, the rectangular cross-section
may be reduced and turned into a round
opening (minimum diameter 100 mm). The connecting pipe
or the reduction must be made out of non-flammable
material (in accordance with DIN 4102-B1). Figure 10 shows an example of
reduction (reduction is not supplied with the cooker).
min
max
figure 9
figure 10