SENKO P 12 WATER+AIR User manual

I N S T R U C T I O N
M A N U A L
SN-EN-6/19
PELLET STOVES
for central heating
P 12 WATER+AIR 13 kW
P 12 SLIM WATER+AIR 13 kW
P 12 WATER+AIR BOX 13 kW
P 20 WATER+AIR 19 kW
P 12 BOX
P 12 SLIM
P 12 and P 20

SENKO pellet WATER+AIR stoves –Instruction manual 1
Dear client, thank you for choosing a SENKO pellet
stove !
This product was designed and manufactured to its
minutest details in order to fulfil your every need for
functionality and safety.
This Instruction manual will teach you to operate your stove
properly, so please read the manual carefully before using
the stove.
SENKO management
This pellet stove is designed according to the following Directives :
EU 305/2011 Construction Product Regulation
EU 2015/1186 Regulation for the energy labelling of local
space heaters
2004/108 EEC Electromagnetic Compatibility Directive
2006/95 EEC Low Voltage Directive
And according to the following standards :
EN 14785 Room heaters fired by wood pellets
EN 60335
EN 62233
EN 61000
EN 55014
Safety of household and similar electrical
appliances
Electromagnetic compatibility
Symbols used in this Instruction manual :
ATTENTION WARNING
SAFETY ADVICE AND RECOMMENDATIONS

SENKO pellet WATER+AIR stoves –Instruction manual 2
CONTENTS
GENERAL ....................................................................................................4
1. WARNINGS AND SAFETY ...................................................................6
1.1. SAFETY DEVICES ...........................................................................10
2. PELLETS..............................................................................................11
3. TECHNICAL FEATURES ....................................................................12
4. INSTALLATION ...................................................................................16
4.1. RECOMMENDATIONS .....................................................................16
4.2. PROPER INSTALLATIONS ...............................................................19
4.3. IMPROPER INSTALLATIONS ...........................................................19
4.4. CONNECTING TO OUTDOOR AIR ....................................................19
4.5. CONNECTING TO CHIMNEY ............................................................21
4.5.1. FLUE PIPES .............................................................................21
4.5.2. CHIMNEY ................................................................................26
4.5.3. CHIMNEY PREPARATION AND CONTROL .....................................27
4.5.4. CHIMNEY CAP .........................................................................28
4.5.5. CHIMNEY FUNCTION ................................................................30
4.6. CENTRAL HEATING SYSTEM CONNECTION ...................................31
4.6.1. INSTALLATION TESTING ...........................................................34
4.6.2. RECEIVING AND MAINTAINING THE INSTALLATION .......................35
5. HANDLING THE STOVE .....................................................................35
5.1. PRE-IGNITION WARNINGS ..............................................................35
5.2. LOADING THE PELLETS .................................................................37
5.3. CONTROL PANEL ...........................................................................37
5.4. REMOTE CONTROL ........................................................................39
5.5. BEFORE FIRST SWITCHING ON ......................................................40
5.5.1. DATE AND TIME MENU …………………....................................43
5.5.2. WATER TEMPERATURE MENU …………………..........................44
5.6. IGNITION / SHUT DOWN .................................................................45
5.7. OPERATING MODE .........................................................................47
5.7.1. MANUAL MODE (MANU) ……………………................................47
5.7.2. AUTOMATIC MODE (AUTO) ........................................................48
5.7.3. ECO MODE (ECO)……………………..………….......................49

SENKO pellet WATER+AIR stoves –Instruction manual 3
5.7.4. WARM AIR FAN (FAN) ...............................................................50
5.8. ADVANCED FUNCTIONS .................................................................51
5.8.1. AUTOMATIC SHUT DOWN (SLEEP)……………….…...….…........51
5.8.2. TIMER (CHRONO) .....................................................................51
5.8.2.1. WEEKLY PROFILES ……………………...……………...54
5.9. SETTINGS ......................................................................................55
5.9.1. BACKLIGHTING ........................................................................55
5.9.2. COMBUSTION RECIPES (PELLET AND AIRFLOW) ..........................56
5.9.3. PELLET FEEDER FILLING (CHARGE PELLET) ................................58
5.9.4. BURNER POT CLEANING (CLEANING) .........................................58
5.9.5. SWITCHING ON THE PUMP (START PUMP)...................................58
5.10. TECHNICAL MENU ........................................................................58
5.11. USER INFO MENU ……………......................................................58
5.12. ALARMS………………..................................................................59
6. CLEANING AND MAINTENANCE ......................................................62
6.1. BURNER POT .................................................................................62
6.2. ASH BOX ........................................................................................63
6.3. DOOR GLASS .................................................................................64
6.4. EXTERNAL SURFACE .....................................................................64
6.5. PELLET TANK .................................................................................65
6.6. FIREBOX DOOR GASKET ................................................................65
6.7. CENTRAL FLUE GAS CHANNEL ......................................................65
6.8. OUTPUT FLUE GAS CHANNEL ........................................................67
6.9. INPUT PRIMARY AIR CHANNEL .......................................................67
6.10. FIREBOX .......................................................................................68
6.11. ELECTRONIC COMPONENTS ........................................................69
7. MALFUNCTIONS / CAUSES / SOLUTIONS ......................................71
8. TECHNICAL SUPPORT ......................................................................73
9. TECHNICAL DATA .............................................................................74
10. TERMS OF WARRANTY ....................................................................75
WARRANTY SHEET .................................................................................76
INSTALLATION REPORT .........................................................................77
CE MARKING ............................................................................................78

SENKO pellet WATER+AIR stoves –Instruction manual 4
GENERAL
oE 2804 pellet stove for central heating P 12 WATER+AIR MODERN
oE 2805 pellet stove for central heating P 20 WATER+AIR MODERN
oE 2806 pellet stove for central heating P 12 SLIM WATER+AIR MODERN
oE 2807 pellet stove for central heating P 12 WATER+AIR BOX
are models from the SENKO pellet stoves palette which can best
accommodate your space heating needs. 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 stove 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 stove.
The external appearance of the stove is shown on the first page of this
Manual. When ordering the stove or the spare parts, it is necessary to state
its full designation, e.g.: E 2805 P 20 WATER+AIR MODERN, color PC-2.
SIDE WALL COLOUR PALETTE:
BORDEAUX PC-2
CREAM/BEIGE PC-3
ANTHRACITE GREY PC-7
Pellet stoves are manufactured in accordance with the EN 14785:2006
norm and comply with all the requirements set by the norm.
The stove is packaged on a EURO pallet. During transport, the stove
must be properly fastened in order to prevent tumbling or damages.
CAUTION! The stove weighs over 250 kg. Extra caution is
necessary when unloading, transferring, moving and installing the
stove in order to avoid physical injury.
The standard delivered stove set consists of:

SENKO pellet WATER+AIR stoves –Instruction manual 5
A) Main switch 0/1 ;
B) Room temperature probe ;
C) Pellet feeder motor ;
D) Closed expansion tank (6L-stove P12, 8L-stove P20) ;
E) Port for connection to PC / room thermostat ;
F) Port for connecting the WI-FI module ;
G) Motherboard ;
H) High-efficiency circulation pump („ErP ready“) ;
I) Primary air inlet pipe 50 mm ;
J) Flue gases suction ventilator ;
K) Safety valve R1/2'' (2,5 bar) ;
L) Valve R1/2'' for filling/emptying the boiler ;
M) Warm air distribution ventilator (below the pellet tank, behind the right
panel) ;
N) Burner pot ;
O) Ash box ;
P) Instruction manual ;
Q) Regulation feet with screw (not supplied for models 2806 and 2807) ;
R) Remote control + power supply cable ;
S) Automatic vent valve (at the highest point, behind the left panel).
A
B
WARM
WATER
COLD
WATER
C
D
E
F
J
H
I
G
K
L
M
N
O
P
Q
R
EQUIPMENT
S

SENKO pellet WATER+AIR stoves –Instruction manual 6
1. WARNINGS AND SAFETY
SENKO pellet stoves are constructed in accordance with all the security
measures prescribed by EN 14785 norm. Attention paid to every stove
component assures safety from potential accidents for both the user and
the fitter.
Our recommendations:
a) Prior to undertaking any operation on the stove the user is
OBLIGATED TO READ AND COMPREHEND this Manual.
b) It is necessary to turn off the stove (the switch must be in position
0) and unplug the electric cable before any operation on the stove.
c) During any operation on the stove, special attention must be paid to
electric connections, especially bare conduit sections, which must
not, in any way, leave the wire grips, thus avoiding direct contact
with the conduit.
d) The stove must not be installed in rooms with gas stoves or
cookers, in bathrooms, laundry objects or similar. The same
applies for rooms and apartments which are vented via air
facilities or hot air heating facilities with fans (air conditioning,
kitchen hoods and similar), UNLESS such facilities have safety
devices which unfailingly prevent occurrence of underpressure of 4
Pa in the room where the furnace has been installed, i.e. rooms
connected with external air.
e) The stove can be installed in a residential space and basement
with normal air humidity and temperature from +5°C to +25°C
(temperature of the surrounding area at the stove in operation).
f) A pellet stove is not resistant to moisture and MUST NOT BE
installed in moist rooms!
g) In spaces where the temperature is less than 5°C (holiday
house) it is necessary to ensure that the stove is working at

SENKO pellet WATER+AIR stoves –Instruction manual 7
minimum power or on the ECO mode (see chapter 5.7.3.). In
central heating systems it is necessary to infuse the antifreeze into
the system.
h) At room temperatures above 25°C, the safety systems on the stove
can be activated.
i) Due to stove operation and flame sound, it’s not recommended to
install the stove in bedrooms and relaxation rooms.
j) For your own safety, DO NOT LEAVE THE STOVE TO
OPERATE DURING THE NIGHT WITHOUT SUPERVISION!
k) The room, in which will be the pellet stove installed, must be large
enough to prevent overheating of the stove the minimum
volume of the room, in which will be the pellet stove installed,
must be 4 m3per kW of stove nominal power!
l) In the room in which the stove is located you should always have
installed additional heating devices (eg. radiators, underfloor
heating, etc ...). This is especially important in the transitional
period (autumn / spring), when the stove is not in use, but you use
heat from other energy sources (solar,biomass, etc.) in combination
with a water storage tank (buffer). Then such heating is sufficient,
but you need a heating device which will warm up the space.
m) It is necessary to adhere to all European, national and local
regulations (norms) applicable in the country of product
installation.
n) The manufacturer is not responsible for any consequences
(people or animal injuries or property damages) resulting from
failure to comply with this Manual.
o) This Manual is an important part of the product, and is therefore
necessary to ensure it is kept next to the product, especially in
cases the product is handed over to a different owner or relocated.

SENKO pellet WATER+AIR stoves –Instruction manual 8
p) This stove is intended for central heating and may not be used for
different purposes. Upon removing the protective foil from the
stove, inspect it for damages and missing parts. Should anything be
missing, contact the vendor you purchased the stove from.
q) Prior to commencing the firing procedure, the stove MUST be
connected to the chimney and central heating system !
r) Connecting the stove to the central heating system must only
be carried out by authorized service personnel. Servicer that
connects the stove to the central heating system must
guarantee the correctness of the system.
s) Never use any flammable liquids for ignition of pellets !
t) Do not leave the pellet bag in contact with a hot stove !
u) All stove parts enable good and proper functioning of the stove and,
when necessary, must be replaced by original spare parts made
exclusively by the manufacturer (failure to install original parts
results in void warranty!)
v) In order to maintain product functionality and to protect it, regular
stove maintenance (service) must be executed in accordance
with the Manual (at user’s expense) depending on the pellets used
- after 2000 operating hours OR once a year (usually before the
heating season) - for A1 quality pellets. For A2 quality pellets and
those without a certificate, the complete stove service should be
done before. The consequences of alarms A01, A02, A03, A04
and A07 are not warranted. THE STOVE USER IS OBLIGED TO
REGULARLY CLEAN THE STOVE, ESPECIALLY ACCORDING
TO CHAPTERS 6.7-6.10 !
It is also necessary to mention:
All stoves before shipment may be activated and tested.
It is FORBIDDEN to dry a laundry in front of a decorative front grille!

SENKO pellet WATER+AIR stoves –Instruction manual 9
Ensure that the stove is always plugged to a properly grounded
socket and don't touch the stove with wet or moist body parts.
The stove is hot during operation and the use of protective
heat insulated gloves is compulsory during handling (opening
and closing of firebox door, removing the ash pan and similar).
It is forbidden to alter safety rules without the permission or
instructions by the manufacturer.
Do not pull out, remove or bend electric cables from the stove even
if the stove has been disconnected from the power grid.
Avoid plugging or reducing the dimensions of air supply opening in
the room where stove has been installed. Air supply openings are
necessary for proper combustion. Minimum combustion air opening
is 10 cm x 10 cm (or a hole with approximate diameter of 12 cm).
During regular stove operation, firebox door must be closed at
all times.
Control primary air supply and flue gases channels for possible
clogging before activating the stove after a long period of inactivity
of the stove.
Following repeated attempts to turn on the stove, accumulated non-
combusted pellets must be removed from the firebox prior to
subsequent attempt.
Pellet tank lid must be closed at all times.
In case of chimney fire, turn off the stove, unplug the power
supply cable, close primary air inlet and don’t open the firebox
door. Extinguish the fire using appropriate fire extinguishers.
NEVER EXTINGUISH A FIRE WITH WATER! In case of fire also
call the local fire department. Comply with local regulations for fire
protection!
If you lose this Manual, you can get a copy from SENKO Company
or its authorized representative. You can also find it at
http://en.senko.hr/

SENKO pellet WATER+AIR stoves –Instruction manual 10
1.1. SAFETY DEVICES
SENKO pellet stove consists of the following safety devices:
Motherboard intervenes directly and activates the alarm until
the stove completely cools off in operating conditions which deviate
from the pre-set safety conditions ;
Fuse protects the stove from sudden changes in electricity
voltage (max.6,3 A and 250 V) - see Figure 47 ;
Pellet tank temperature safety probe in the case of too high
pellet tank temperature (max.110°C), the probe automatically
blocks pellet feeding and activates the alarm A03 ;
Water tank temperature safety probe in the case of too high
boiler water temperature (max.95°C), the probe automatically
blocks pellet feeding and activates the alarm A18 ;
Flue gases temperature measurement probe in case of
excessive flue gases temperature (max.180°C) the probe
automatically resets the stove to normal temperature values
(minimum power –level 1, i.e. fire 1 on the control panel) OR
activates the alarm A04 ;
Room temperature measurement probe in case of higher
room temperature from the set point the probe automatically resets
the stove to normal temperature values (minimum power –level 1,
i.e. fire 1 on the control panel) - see Figure 33a ;
Water temperature measurement probe in case that the water
temperature increases above 85°C, the probe automatically resets
the stove to normal temperature values (minimum power –level 1,
i.e. fire 1 on the control panel) ;
Primary combustion air flow measurement probe in case of
insufficient (or excessive) chimney diameter, this probe
automatically regulates (to a certain level) the speed of flue gases
ventilator, i.e. primary air flow, in order to achieve optimum fuel
combustion in the firebox.

SENKO pellet WATER+AIR stoves –Instruction manual 11
2. PELLETS
Pellets are pressed wooden waste
(sawdust and similar) obtained by mechanic
pressing in special machines. Apart from
being an ecological fuel, pellets also have a
technical advantage over other wooden
biomass –they have the highest calorific
value and very low humidity (10% max).
The pellets you use must be certified in
accordance with EN 14961-2, Ö-Norm
M 7135, DIN 51731 or ENplus-A1 norm.
How to determine pellet quality?
They must by cylindrical with a constant diameter and must have a
shiny surface!
Their diameter must be 5 - 6 mm and their length 10 - 40 mm!
There must not be too much sawdust or dust in the packaging!
The packaging must be hermetically sealed (due to potential
exposure to moisture)!
The pellets must break, but not crack!
Put a handful of pellets into a water container. If the pellets are
good quality, they will sink to the bottom, otherwise they will float!
Pellets must be stored in dry conditions!
Use of low quality pellets or any other fuel
adversely affects the functionality of your
stove and can result in void warranty and
annulment of manufacturer responsibility !

SENKO pellet WATER+AIR stoves –Instruction manual 12
3. TECHNICAL FEATURES
SENKO pellet stove WATER is constructed for the purpose of heating
residential spaces and central heating, but also to serve as a piece of a
decorative element in every room. Fan blows warm air from the stove to the
room through grids on the front side of the stove. The second fan is leading
the primary air to the firebox and at the same time flue gases are lead from
the firebox to the chimney.
Stove centre and load bearing construction are made from steel sheets.
Internal part of the firebox (boiler) is made of highly resistant quality boiler
sheet according to EN 14785. Firebox is equipped with door with fire
resistant glass. This solution provides an aesthetically pleasing visual effect
of flame in the firebox, simultaneously preventing the egress of ash and
smoke into the heated area.
THE KEY:
①Port for WI-FI module connection
②Port for connection to PC / room thermostat (see Figure 33a)
③Room temperature measurement probe (see “P”on Figure 33a)
④Main switch 0/1
Ⓐ50 mm –primary air inlet
Ⓑ80 mm –flue gases outlet
ⒸR1/2'' F –valve for boiler filling / emptying
ⒹR3/4'' M (P 12) / R1'' M (P 20) –cold water
ⒺR1'' M –warm water
ⒻR3/4'' F –safety valve (2,5 bar)
ⓅCirculation pump (behind the side panel)

SENKO pellet WATER+AIR stoves –Instruction manual 13
Figure 1
③
②
④
①
Ⓐ
Ⓑ
Ⓓ
Ⓔ
P 12 WATER+AIR
Ⓒ
Ⓕ
Ⓟ
P 12 WATER+AIR BOX
①
②
④
③
Ⓐ
Ⓑ
Ⓕ
Ⓓ
Ⓒ
Ⓔ
Ⓟ

SENKO pellet WATER+AIR stoves –Instruction manual 14
P 12 SLIM WATER+AIR
P 20 WATER+AIR
Figure 1
①
②
③
④
Ⓐ
Ⓑ
Ⓓ
Ⓔ
Ⓓ
Ⓔ
③
④
①
②
Ⓐ
Ⓑ
Ⓒ
Ⓕ
Ⓟ
Ⓒ
Ⓕ
Ⓟ

SENKO pellet WATER+AIR stoves –Instruction manual 15
Figure 2
THE KEY:
1. Control panel
2. Cleaning hatch lid
3. Flue gas lid
4. Top decorative sheet
5. Firebox plate
6. Firebox
7. Firebox door glass
8. Burner pot
9. Lower protective sheet
10.Pellet igniter
11.Base with screws for height
adjustment
12.Flue gases fan
13.Chimney connection Ø80mm
14.Connection Ø50mm for
outside (primary) air inlet
15.Airflow sensor
16.Pellet feeder motor
17.Pellet feeder
18.Warm air fan
19. Pellet tank
20. Pellet tank grid
21. Pellet tank gasket
AB –Ash box (see Chapter 6.2.)
CFGC –Central flue gas channel
(see Chapter 6.7.)
1
2
4
3
5
6
7
8
9
11
10
12
13
14
16
17
18
19
20
21
15
AB
CFGC
CFGC

SENKO pellet WATER+AIR stoves –Instruction manual 16
4. INSTALLATION
4.1. RECOMMENDATIONS
Figure 3

SENKO pellet WATER+AIR stoves –Instruction manual 17
PELLET
STOVE
We advise you to check the following elements prior to installation:
Appropriate minimum volume of space where the stove will be
installed (avoid placing the stove into hollow or narrow spaces
under 40 m3 of volume);
Ensure suitable and proper exchange of primary air necessary for
combustion via connection with external air;
Proper execution of chimney and smoke venting pipes.
Prior to installation it is necessary to control proper positioning of the
stove and the chimney, which must comply with :
Prohibitions concerning the installation;
Safety distances;
Limitation prescribed by the local administrative regulations or special
safety measures prescribed by the authority;
It is not allowed to install the stove in rooms where another heating
device without the autonomous air exchange already exists;
It is forbidden to install the stove in the room with explosive
atmosphere.
A
200 mm from the back wall
B
200 mm from the side wall
C
800 mm from the front grid
D
500 mm floor protection
E
300 mm (measured from
the maximum angle of
firebox door opening)
BACK WALL
SIDE WALL
SIDE WALL
FLOOR PROTECTION
RADIATION AREA
Table 2
Figure 4

SENKO pellet WATER+AIR stoves –Instruction manual 18
Adjoining walls must be constructed of brick or concrete, or other non-
flammable materials, i.e. protected with insulation. The stove emits heat,
especially on the firebox level, therefore, no flammable or heat sensitive
objects must be placed nearby (for example, alcohol, paper, plastic
objects…).
The stove must be installed with adherence to minimum prescribed
measures and constant control of the safety distance from the walls and
the furniture (figure 4). If the floor is made of flammable material (e.g.
wooden parquet) it must be protected with a single plate made of non-
flammable material which must be placed under and around the stove to
prevent floor overheating problems (figures 3 and 4 –floor protection).
We recommend to install the stove as close to the smoke venting pipe
as possible, limiting the number of roundings to a minimum (max 3 + T-
piece for inspection and cleaning) and chimney horizontal parts (max
total 3 m with a 3-5° incline) see 4.5. Connecting to chimney.
Flammable
objects
Non-flammable
objects
A
200 mm
100 mm
B
1500 mm
800 mm
C
300 mm
200 mm
Table 3
Figure 5

SENKO pellet WATER+AIR stoves –Instruction manual 19
4.2. PROPER INSTALLATIONS
Only devices that function as a closed system (close chamber) or
don’t create underpressure with regard to the external ambient may be
installed or already exist in the room where the stove is to be installed.
Installation of food processing devices and kitchen hoods without
suction is allowed only in rooms used as kitchens.
4.3. IMPROPER INSTALLATIONS
Devices that must not exist nor may be installed in the rooms where the
stove will be installed are:
kitchen hoods, air-conditioning devices;
collective type ventilation pipes.
When the afore mentioned devices are located in the adjoining rooms,
which are in contact with the room where SENKO pellet stove is installed, it
is forbidden to use these devices simultaneously in cases where there is a
risk that underpressure will occur in one of the two rooms with regards to
the other.
4.4. CONNECTING TO OUTDOOR AIR
For proper stove function and good distribution of heat it is necessary to
position the stove in a place where there is an opening for intake of external
(primary) air necessary for pellet combustion or where one can be
constructed. Minimum opening surface must be 100 cm2(figures 6a, 7).
The opening must be constructed to prevent any form of clogging
(protected by grid, metal mesh or appropriate protection).