Metal-Fach SE MAX II-15 Operator's manual

Technical and operational documentation
SE MAX II
Original instructions, issue 08/2021
English

1
INTRODUCTION
Dear customer, thank you for purchasing a heating boiler from METAL-FACH. We hope that the operation of the device will meet your expectations and provide a lot of satisfaction. The
heating boiler has been designed and manufactured in accordance with applicable norms and standards, guaranteeing safe and reliable operation. Operation with strict observance of the instructions
included in the manual attached to the appliance will ensure optimal and reliable operation of the central heating boiler for many years.
The product is not intended for use by persons with reduced physical / mental capacity or lack of experience and knowledge, if these persons are supervised or instructed by a person responsible for
their safety. It is forbidden for children to operate the boiler.

2
Table of contents:
1. Introductory steps.......................................................................................................................3
2. Information pictograms..............................................................................................................3
3. The symbols used in the instruction .........................................................................................3
4. Definitions of terms used in the instruction.............................................................................3
5. General information ...................................................................................................................4
6. Boiler equipment ........................................................................................................................4
7. Application ...................................................................................................................................4
8. Basic elements of boiler construction.......................................................................................4
9. Podstawowe wymiary kotłów SE MAX II....................................................................................6
10. Technical data of SE MAX II boilers............................................................................................9
11. Fuel .............................................................................................................................................10
12. Boiler room and boiler installation requirements.................................................................10
13. Installation of the boiler ...........................................................................................................11
14. Connection of the boiler to the heating system ....................................................................11
15. Requirements for the expansion vessel .................................................................................14
16. Connection of the boiler to the electrical installation ...........................................................14
17. Connection of the boiler to the chimney ................................................................................14
18. Start-up of the boiler.................................................................................................................15
19. When using the boiler, remember ..........................................................................................15
20. Cleaning and maintenance of the boiler ................................................................................16
21. Instructions for decommissioning the boiler after its lifetime .............................................16
22. Possible faults and malfunctions.............................................................................................16
Conformity declaration WE/UE ................................................................................................19
Report on the first start-up of the boiler ................................................................................21
Report on the first start-up of the boiler ................................................................................23
List of tables:
Table 2.1 Pictograms ............................................................................................................................ 3
Table 6.1 Boiler equipment ................................................................................................................. 4
Table 9.1 Dimensions (mm) of the SE MAX II boiler .......................................................................... 8
Table 10.1 Technical data of the SE MAX II boiler.............................................................................. 9
Table 13.1 Flammability of masses and building materials ........................................................... 11
Table 14.1 Markings used in the diagrams ...................................................................................... 12
Table 14.2 Markings used in the diagrams ...................................................................................... 12
List of drawings:
Figure 1.1 Nameplate .......................................................................................................................... 3
Drawing 8.1 Basic components of the SE MAX II boiler - 15kW ...................................................... 5
Drawing 8.2 Basic components of the SE MAX II boiler - 20kW ....................................................... 5
Drawing 8.3 Basic components of the SE MAX II boiler --25-50 kW................................................. 6
Drawing 9.1 Boiler dimensions SE MAX II - 15kW.............................................................................. 6
Drawing 9.2 Boiler dimensions SE MAX II - 20kW.............................................................................. 7
Drawing 9.3 Boiler dimensions SE MAX II -25-50 kW ........................................................................ 7
Figure 12.1 Minimum boiler installation distances in the boiler room......................................... 11
Drawing 14.1 Diagram of connection of the boiler to the heating system................................... 12
Figure 14.2 Scheme of connection of the boiler to the heating system ....................................... 12
Drawing 14.3 Connection of the boiler to the heating system ...................................................... 13
Drawing 14.4 Connection of the boiler to a heating system with a ladder and a buffer. ........... 13

3
1. Introductory steps
(USER)
Actions to be performed when receiving a METAL-FACH boiler:
Check carefully the completeness of the delivered boiler (Table 6.1) and that the boiler has
not been damaged during transport;
Compare the identification plate mounted on the boiler casing on the left or right side with
your order (Drawing 1.1);
Carefully read the manual - it contains the information needed to use the boiler properly.
If you encounter any problems, please contact the service department or an authorised
METAL-FACH service centre. These persons have appropriate training and access to original parts
for proper service and installation of METAL-FACH boilers, confirmed by a certificate issued at the
company's headquarters.
Figure 1.1 Nameplate
2. Information pictograms
(USER)
Table 2.1 Pictograms
Symbol
Description
Symbol
Description
Years of warranty (exchanger)
Controller
Approved boiler steel
Fan
Large loading bay
Thrust gauge
Water grate
Movable SDG
(11-25)
Chimney draught controller
3. The symbols used in the instruction
(USER/INSTALLER)
ATTENTION!
Very important information, always read it if it is in a particular place.
TIP!
It is worth to read this information, it makes it easier to use.
4. Definitions of terms used in the
instruction
(USER/INSTALLER)
Central heating boiler - a device for burning various types of solid fuels in order to heat up
the heat carrier (usually water) circulating in the central heating circuit.
Thrust gauge - a device whose task is to control temperature in solid fuel boilers. As the
temperature increases, the air supply to the furnace is limited, which slows down the fuel
combustion. As the temperature drops, the air supply increases, making it possible for the fuel to
be re-combustion.
Chimney draught regulator - serves to stabilize and reduce too much negative pressure in
chimney ducts.

4
5. General information
(USER)
The Technical and Operational Documentation is one part of the product, it is delivered
together with the purchased central heating boiler. The Technical and Operating Documentation
contains data concerning the construction and assembly and the way of using SE MAX II series
boilers. Carefully read the manual to ensure correct and safe operation of our boiler.
ATTENTION!
The user is advised to follow all instructions for the unit contained in this Operation
and Technical Documentation, in the Warranty Conditions and in the generally
applicable legal regulations.
The boilers are delivered in an assembled condition. They are positioned and fixed to the
pallet in a permanent manner. Additional protection in the form of foil packaging is used.
When transporting the boiler, it must be secured against moving or rotating on the vehicle's
load bed by means of safety equipment such as belts. Transportation of boilers should be carried
out in accordance with the rules for transporting materials. Loading and unloading should be
carried out by means of lifting devices (forklift) with a lifting capacity greater than 1000 kg.
6. Boiler equipment
(USER)
The scope of delivery includes both basic and additional elements, depending on the order
placed. During the reception, the product should be carefully inspected for damage during
transport and the completeness of the equipment checked. The basic and additional equipment is
described below (Table 6.1).
Table 6.1 Boiler equipment
Basic equipment:
Unit of
measurement
Number
Central heating boiler
Pcs.
1
Ashtray drawer
Pcs.
1
Tools for cleaning the boiler:
poker
Brush
Pcs.
1
Thermometer
Pcs.
1
Additional equipment:
Unit of
measurement
Number
Thrust gauge
Pcs.
1
Documentation:
Unit of
measurement
Number
Technical and operational documentation of the boiler
Pcs.
1
ATTENTION!
METAL-FACH reserves the right to make changes to technical parameters,
equipment and specifications of the offered goods without prior notice.
7. Application
(USER/INSTALLER)
Steel water boilers are designed for heating of domestic water in central heating systems. They
are designed for heating residential buildings such as: single-family and multi-family houses, utility
buildings, public buildings. Thanks to the application of modern structural solutions, the SE MAX II
boiler achieves efficiency ≤81%. Correct operation and achievement of full boiler capacity depends
on the quality of the installation, proper chimney draught, correct operation and maintenance of
the boiler.
ATTENTION!
The boilers are designed for operation in open and closed water systems with
gravity or forced circulation, with protections in accordance with the requirements
of the current standard PN-B-02413 Heating and heating and closed system in
accordance with PN-EN 12828 Heating systems in buildings. Design.
8. Basic elements of boiler construction
(USER/INSTALLER)
The water body is made as a welded construction from certified steel sheets 6 mm thick
P265GH (for elements in contact with exhaust gases) and 4 mm (for other elements) S235JR+N.

5
Drawing 8.1 Basic components of the SE MAX II boiler - 15kW
Description of the drawing:
1. Boiler casing
2. Thermal insulation
3. Boiler body
4. Fan mounting
5. Power supply connection
6. The exhaust gas throttle
7. Flue
8. Return spigot
9. Blow window
10. Water grate
11. Grating door
12. Thermometer
13. Temperature sensor sockets
14. The thrust gauge stub
15. Air dispenser
16. Scaffolding door
17. Backfill door
18. Door clear
19. Drawer
20. Convection
channels
21. Secondary air
damper
Drawing 8.2 Basic components of the SE MAX II boiler - 20kW
Description of the drawing:
1. Boiler casing
2. Thermal insulation
3. Boiler body
4. Fan mounting
5. Power supply connection
6. Flue
7. Return spigot
8. Blow window
9. Moving grate
10. Water grate
11. Grating door
12. Thermometer
13. Temperature sensor sockets
14. The thrust gauge stub
15. The handle of the
scaffolding
16. Air dispenser
17. Grid door with
ashtray
18. Backfill door
19. Door clear
20. Ashtray drawer
21. Exhaust gas throttle
22. Convection channels
23. Secondary air
damper

6
Drawing 8.3 Basic components of the SE MAX II boiler --25-50 kW
Opis rysunku:
1. Backfill door
2. Cleaner's door
3. The grate door
4. Ash door
5. The air door
6. Dosing knob
7. Secondary air damper
8. The thrust gauge stub
9. Thermometer
10. Lever of the moving grate
11. Boiler body
12. Water grate
13. Mobile grate
14. Blow window
15. Ashtray
16. Exhaust gas throttle
17. Blower channel
18. Blow Channel
19. Temperature sensor sleeve
20. Exhaust outlet
21. Return spigot
22. Pre-running door
23. Boiler insulation
9. Podstawowe wymiary kotłów SE MAX II
(UŻYTKOWNIK/INSTALATOR)
Drawing 9.1 Boiler dimensions SE MAX II - 15kW

7
Drawing 9.2 Boiler dimensions SE MAX II - 20kW
Drawing 9.3 Boiler dimensions SE MAX II -25-50 kW

8
Table 9.1 Dimensions (mm) of the SE MAX II boiler
TYPE
SE MAX II - 15
SE MAX II - 20
SE MAX II - 25
SE MAX II - 30
SE MAX II - 35
SE MAX II - 40
SE MAX II - 50
A
-
-
-
-
-
-
-
B
436
436
450
510
530
580
630
C
962
1122
1201
1256
1256
1256
1256
D
561
613
695
804
804
804
804
E
770
914
1035
1090
1090
1090
1090
F
383
435
547
671
671
671
671
G
3/4''
3/4''
3/4''
3/4''
3/4''
3/4''
3/4''
H
1,5''
1,5''
1,5''
1,5''
1,5''
1,5''
1,5''
I
160
160
180
180
180
180
180
J
1,5''
1,5''
1,5''
1,5''
1,5''
1,5''
1.5''
K
186
190
253
253
253
253
253
L
169
173
241
241
241
241
241
M
-
-
-
-
-
-
-
N
-
-
-
-
-
-
-
O
100
100
125
125
125
125
125
P
726
777
921
1029
1029
1029
1029
R
339
312
351
323
323
323
323
S
332
376
420
520
520
520
520
T
238
238
258
318
338
388
438
U
238x190
238x190
258x190
318x238
338x238
388x238
438x238

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10. Technical data of SE MAX II boilers
(USER/INSTALLER)
Table 10.1 Technical data of the SE MAX II boiler
PARAMETERS
UNIT S.I.
BOILER MODEL
SE MAX II- 15
SE MAX II- 20
SE MAX II- 25
SE MAX II- 30
SE MAX II- 35
SE MAX II- 40
SE MAX II- 50
Nominal heat output of hard coal combustion
[kW]
15
20
25
30
35
40
50
Heating surface
[m2]
0,85
1,15
1,56
2,19
2,27
2,48
2,70
Area to be heated
[m2]
80
80-120
150
150-200
210-270
270-320
320-380
Water capacity
[L]
30
41
56
71
87
93
111
Maximum operating pressure
[bar]
1,5
1,5
1,5
1,5
1,5
1,5
1,5
Maximum operating temperature
[°C]
80
80
80
80
80
80
80
Test pressure
[bar]
4
4
4
4
4
4
4
Boiler class
[bar]
Efficiency of the boiler
[%]
≤81
≤81
≤81
≤81
≤81
≤81
≤81
Fuel
[-]
wood, coal
Design flow resistance ΔT
[10K]
0,14
0,23
2,77
8,79
12,88
17,75
26,51
Design flow resistance ΔT
[20K]
0,07
0,12
1,19
2,19
3,22
4,43
6,62
Weight of the boiler
[kg]
160
198
260
330
350
370
395

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11. Fuel
(USER)
Fuel for boilers of SE MAX II series is hardwood not exceeding 20% humidity, hard coal of OI
range.
It is recommended to use deciduous wood such as beech, hornbeam, oak, birch, alder, ash.
The use of coniferous wood is not recommended as it causes burial of boilers and the need for
more frequent cleaning.
ATTENTION!
When using wood with a moisture content of more than 20%, it is recommended
to use an acid-resistant steel insert in the flue pipe.
12. Boiler room and boiler installation
requirements
(USER/INSTALLER)
In Poland, boiler plants built for solid fuel should meet the requirements of the standard PN-
87/B-02411 "Boilers built for solid fuel" and Journal of Laws. 2015.0.1422. They have been divided
into two types:
1) For small boiler plants up to 25 kw output, the following requirements should be met:
The boiler should be located as central as possible to the ratio of heated rooms and in a
separate room;
The floor of the boiler room should be non-combustible, in the case of combustible
material the floor should be covered with 0,7 mm thick steel sheet at a distance of at least
50 cm from the edge of the boiler; the boiler should be placed on a foundation made of
non-combustible materials, protruding 0,5 cm above the floor level and with steel angles;
There should be artificial lighting in the room, natural lighting is also recommended;
The wheel in the room should allow free access to the boiler during cleaning and
maintenance; the distance from the rear of the boiler to the wall should not be less than
70 cm, from the side of the boiler to the wall not less than 100 cm, and from the front of
the boiler to the opposite wall not less than 200 cm;
The height in new buildings should be at least 220 cm, in the case of existing buildings the
boiler room height is at least 190 cm, with proper ventilation (supply and exhaust)
provided;
Supply air ventilation should be provided by means of an unclosed opening with a
minimum cross-section of 200 cm2 and placed up to a maximum of 100 cm above floor
level;
Exhaust ventilation shall be carried out by means of an exhaust duct made of non-
flammable material with a minimum cross-section of 14 x 14 cm with an inlet opening
under the ceiling of the boiler room; the exhaust duct shall be led above the roof and
placed near the chimney; there shall be no devices enabling its closure;
The chimney section should not be less than 20 x 20 cm;
There should be a floor drain in the boiler room floor;
The optimal place to store fuel is a separate room located near the boiler room;
Ash and slag should be collected in appropriate containers to allow daily emptying.
2) Boilers with a heat output of 25 kw or more shall additionally meet the following
requirements:
The distance from the boiler furthest from the chimney, with gravity draught, must not
exceed 50 cm of chimney height;
The fuel and slag storage facility should be located near the boiler hall at a storage height
of up to 220 cm with a minimum of 50 cm free space above the fuel;
Equipment and devices enabling vertical and horizontal transport of fuel and slag shall be
included;
The fuel depot rooms should have a natural ventilation system, which allows for one full
air exchange per hour in the fuel depot and three full air exchange in the slag depot;
The entry doors to the boiler room shall be non-combustible (fire resistance class 0,5),
minimum width 80 cm, opening outwards; they shall have a locking system without a
handle enabling them to be opened outwards under pressure, inwards using a handle;
The ventilation requirements shall be those for boiler rooms with smaller capacities; in
addition to supply-exhaust ventilation, in boiler rooms with a capacity greater than 400 kw,
there shall be mechanical ventilation, switched on periodically when fuel is backfilled and
the boilers are de-combusted, ensuring a minimum of 10 full air changes per hour;
The boiler room shall include natural lighting, illuminating the boiler from the front and the
windows shall be a minimum of 1/15 of the boiler room floor area; half of the installed
Shall be open; electrical lighting and an electrical outlet not exceeding 24 V shall also be
provided in the room;
There shall be a sump in the floor to cool the water and its capacity shall be equal to that
of the largest boiler, but not exceeding 2 m3;
In the boiler room, the heat pipes shall be insulated;
The boiler room layout with the minimum required distances is shown in the boiler room
layout (Figure 12.1).
ATTENTION!
Do not use mechanical exhaust ventilation in the boiler room.
ATTENTION!
Ensuring the supply of sufficient fresh air to the boiler room will enable effective fuel
combustion.
ATTENTION!
Excessive carbon dioxide formation in the room must be prevented.
ATTENTION!
For more detailed information on the requirements for the construction of the boiler
room, see the Regulation of the Minister of Infrastructure of 12 March 2009.

11
Figure 12.1 Minimum boiler installation distances in the boiler room
TIP!
The above mentioned provisions are guidelines to be reviewed as the Regulation is
subject to revision.
13. Installation of the boiler
(USER/INSTALLER)
An important element of assembly is correct positioning and leveling of the SE MAX II boiler
type, these boilers do not require special foundations. The boiler must stand vertically.
The boiler should be placed on a heat insulating non-flammable pad, which should be 2 cm
larger than the boiler base on each side. If the boiler is located in the basement, it is
recommended to place it on at least 5 cm of foundation. The strength of the foundation as well as
the fire protection conditions are the key guidelines when setting up the boiler in the right place:
20 cm safe distance from flammable materials;
40 cm for flammable materials with flammability grade C3;
40 cm if the flammability degree is not known.
ATTENTION!
The temperature of water return from the system to the central heating boiler
should not be lower than 45ºC.
ATTENTION!
It is required to connect the boiler to the heating system using a four-way valve.
Table 13.1 Flammability of masses and building materials
Flammability of building masses and
products
Building masses and products
A - Non-flaming
Sandstone, concrete, bricks, fire plaster, mortar,
ceramic tiles, granite
B - Hardly burning
Wooden cement boards, fibreglass, mineral
insulation
C1 - Hardly burning
Beech wood, oak wood, plywood
C2 - Medium burning
Pine, larch and spruce cork, sawn wood planks,
rubber floor coverings
C3 - Easily burning
Asphalt plywood, pulp, polyurethane, polystyrene,
polyethylene, plastic, PVC
14. Connection of the boiler to the heating
system
(INSTALLER)
Connection of the boiler to the central heating system should be made by a company
authorized by the manufacturer, and the fact of proper connection should be confirmed on the
warranty card attached to this manual. The boiler should be connected according to the
manufacturer's recommendations, in accordance with this manual.
ATTENTION!
It is recommended that the first start-up of the boiler be carried out in
accordance with the guidelines contained in the Technical and Operational
Documentation by a person with a valid licence - (Information on persons
authorised to start up the boiler is available from the Manufacturer - phone: +48 85
711 94 56).
ATTENTION!
An incorrectly levelled boiler can be damaged.

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Boiler connection diagrams for heating system according to PN - 91/B - 02420 standard.
Drawing 14.1 Diagram of connection of the boiler to the heating system
Table 14.1 Markings used in the diagrams
Designation
Description
RO
Breathing pipe
RW
Expansion pipe
RS
Signal tube
RP
Overflow pipe
RB
Safety tube
T1
Temperature
P1
Pressure
Figure 14.2 Scheme of connection of the boiler to the heating system
Table 14.2 Markings used in the diagrams
Designation
Description
T
Temperature sensor
Tk
Boiler temperature sensor
Tz
Outdoor temperature sensor
Tcw
Domestic hot water temperature sensor
Tco
Central heating temperature sensor
Tpw
Boiler return temperature sensor
Tpod
Feeder temperature sensor

13
Drawing 14.3 Connection of the boiler to the heating system
Description of the drawing:
1. Outside the building
2. The vessel in the collective
3. The room controller
4. Mixer
5. The heater
6. The heating circuit
7. Central heating pump (chp)
8. Domestic hot water pump (dhw)
9. Buffer
10. Laddomat
Drawing 14.4 Connection of the boiler to a heating system with a ladder and a buffer.

14
15. Requirements for the expansion vessel
(INSTALLER)
Each open-system heating system should be equipped with a collecting vessel to take up the
increase in the volume of water filling the system and to vent. This vessel should be installed at the
highest point of the installation, if possible in a vertical line above the boiler(s).
The volume of the vessel in the collective vessel can be estimated by assuming a unit capacity
per kW of thermal capacity of 1-2 dm3. The vessel is equipped with a spigot to be connected in a
lifted safety pipe, a safety fall pipe and an overflow pipe and a vent connected to it.
The diameter of the vent and overflow pipe is at least:
[MM]
- boiler capacity [kW]
The most important requirements for safety devices are as follows:
The vessel in the tank should have a volume of approximately 3.5% of the volume of water
in the heating system including the boiler;
each boiler should absolutely have a safety pipe and an overflow pipe;
the installation shall be equipped with a signalling pipe and a collective pipe and a venting
connection for the vessel in the collective.
If several boilers are installed, each of them should be equipped with a safety pipe according
to the given rules according to PN-91/B02413 - protection of open system water heating
installations. No shut-off valves must be installed on the safety and overflow pipes and the pipe
and vessel must be protected against freezing.
16. Connection of the boiler to the electrical
installation
(INSTALLER)
The boiler is designed for connection of 230V/50Hz voltage. The installation should be made
by a qualified person. The 230V/10A connection socket with earthing should be easily accessible.
Boiler power supply and boiler room lighting should have a different circuit. Completion of
installation and heating test must be recorded in the Warranty Card. The completed Warranty
Card should be sent to the manufacturer's address by the user in order to register the user in the
company's system.
ATTENTION!
The first start-up of the boiler must be carried out only by a service technician
trained by the manufacturer, with a current certificate from an Authorised
Service Technician, a METAL-FACH Distributor, or a person with SEP
qualifications up to 1.5 kW.
17. Connection of the boiler to the chimney
(INSTALLER)
Smoke ducts
The purpose of the smoke ducts is to reliably discharge the fumes to the outside and suck in
the air that enables fuel to be burned. The chimney draught needed for this depends on:
The temperature difference between hot smoke and cold air;
the effective height of the chimney;
chimney section not less than 20 x 20 cm;
the design of the chimney (as smooth internal surfaces as possible) and the tightness of the
joints;
The effective height of the chimney is the difference in height between the highest fireplace
and the chimney outlet. The effective height of individual chimneys must be at least 4 m, and
common chimneys for solid and liquid fuels at least 5 m. The difference in height between the two
fireplaces must not be greater than 6,5 m.
In the case of sloping roofs, chimneys shall end within the ridge (the highest roof angle), in the
area of free wind flow. This avoids draught disturbances. Always pay attention to the position of
the building in relation to other buildings.
Chimney selection
In most cases, an approximate method or selection according to the chimney manufacturer's
diagrams is sufficient to select the chimney. In special cases (unfavourable pressure and
temperature dependencies, large flue gas volume), chimneys are calculated according to PN-EN
13384-1+A2:2008.
Chimneys for solid fuel boilers
Please note that solid fuel fireplaces with a nominal heat output of >20 kW and without a fan
need their own chimney. Single-layer brick chimneys can be used for solid fuel fireplaces.
Currently, three-layer chimneys with a smooth surface and good thermal insulation are used.
Flue
The boiler is connected to the chimney by a flue pipe and a flue pipe. The flue pipe is a pipe
and fittings which are laid indoors. Smoke ducts meet the requirements of the Polish Fire Safety
Association for chimneys and are often made of the same material as the main chimney. Smoke
ducts should be made of non-flammable products. The pipes or casing of smoke ducts should
meet the requirements specified in the Polish Standard for fire tests of small chimneys. It is
allowed to make a casing of solid brick 12 cm thick, bricked on cement and lime mortar, with
external plaster or grouting. The connectors should be as short as possible and laid with an
elevation to the chimney in order to avoid heat loss and additional resistance. They must not be
led to other storeys. Flue pipes shall not be laid in rooms where the fireplace cannot be installed,
nor shall they be placed in walls and ceilings. In view of the low temperature of the flue gas, to
protect the chimney from moisture and to limit the draught, acid-resistant or ceramic chimney
inserts should be used, with condensate drainage to the drain. A distance of at least 6 m should be
ensured between the chimney and the nearest edge of the tree crown.

15
18. Start-up of the boiler
(USER/INSTALLER)
Before starting to light a fire in the boiler, check if the central heating system has been made
correctly and if it is filled with water correctly - until it is poured out of the overflow pipe in the
collector vessel.
For filling the whole installation or filling up the cavities, softened water/chemical treated
water, distilled water or rainwater would be most suitable.
In addition, it should be checked whether the grate is cleaned of unburned fuel, ash and slag
from the previous burning and whether the ash has been removed from the ashtray.
Recommended firing (correct - from the top) - the prepared grate deck should be filled with
fuel, (when burning wood - full filling - to the bottom edge of the filling, the clearing should be laid
across the boiler) ...place a layer of heating, (paper, wood chips) on the surface and set it on fire.
We start up the boiler with the ajar flap of the primary air dispenser placed in the lower door
(scaffolding and ashtray door) and with the secondary air damper open in the charging door.
Boiler operation in the upper combustion system takes place in a system with cyclic fuel
filling, which means that after a complete burnout of a portion of fuel filled into the combustion
chamber and removing the ashes from it, the chamber is filled up again and a new portion of fuel
is burned using the heating fuel.
We do not recommend firing up the fuel "from below" in backfill boilers of the upper
combustion type.
Before burning up the firing-up layer, make sure that the chimney provides sufficient draught.
The phenomenon of insufficient draught is most often encountered when the boiler is started up
for the first time or when the operation is interrupted for a longer period when the boiler and
chimney have been cooled down. In order to check the chimney draught, a lit wood splash should
be brought close to the air inlet duct with the damper open.
If we find that the flame is not drawn intensively into the boiler, this indicates insufficient
chimney draught.
In this case, before burning a layer of wood, the chimney must be "warmed up" as follows:
Insert a few wood pins into the flue pipe and set it on fire;
maintain the fire until the chimney draught increases (the flame is drawn into the chimney);
after the wood has burnt out, remove the unburnt residue and throw it into an ashtray.
Once the desired water temperature in the boiler is reached, adjust the intensity of
combustion. The intensity of combustion is adjusted by adjusting the adjustment screw of the
primary air dosing flap and by adjusting the secondary air damper accordingly. During normal
boiler operation, it is necessary to check and replenish the fuel periodically in the way specified
above. In case of hard coal, hitting the hook will cause the fuel to slip.
Special caution must be exercised when opening the charging door, as if it is suddenly opened,
explosive gas (degassing products) may be ignited. When opening the door, stand on the side of
the boiler, tilt the door slightly, wait for a while until the flue gases are discharged from the fuel
tank will give off the chimney, and then slowly open it completely. Also then do not stand in front
of the door opening. The same procedure should be followed when opening the remaining door
while the boiler is running.
ATTENTION!
If for any reason there is a lack of water in the boiler-network system, do not
top up with cold water. Cool down the boiler as soon as possible to 30°C and
only after the boiler has cooled down, top up with water and start burning
again.
ATTENTION!
The inflow of cold water to the boiler walls when they are hot (ignited) may
result in the explosion of the boiler and consequently in the destruction of
heating equipment. In extreme cases it can cause damage to buildings and
injury to people.
When a cold boiler is started up or for the first time, the phenomenon of "boiler sweating" may
occur. This gives the impression of a leakage. In this case an intensive burning process (70-80ºC)
should be carried out to dry and heat up the boiler and chimney duct even for 2-3 days.
To increase the life of the boiler it is recommended to maintain temperature
180ºC of the flue gas above the ambient temperature and the boiler water temperature should
not be lower than 60ºC.
Maintaining a sufficiently low temperature in the radiators in this situation in the autumn or spring
period can be achieved, among others, through
Correct selection of the boiler to the size of heated rooms;
Using three- or four-way mixing valves, controlled manually or automatically, between water
supply and return.
Incorrect warming (insulation) of the expansion (overflow) vessel can also cause a boiler
explosion with all negative effects.
Water frozen in the expansion vessel interrupts the connection between the central heating
system and the boiler and the atmosphere, and when the boiler water temperature rises, an
uncontrolled increase in pressure in the system takes place, which in turn can lead to a boiler
explosion.
ATTENTION!
Do not stand in front of the boiler when opening the door, burns may occur.
19. When using the boiler, remember
(USER)
The boiler may only be operated by adults who have read the operating instructions;
It is forbidden to stay near the boiler for children without adult presence;
If flammable gases or vapours get into the boiler room or during operation, during which
the risk of fire or explosion is increased (gluing, varnishing, etc.), the boiler must be
switched off before starting this work;
When cleaning the carbon in the retort, gutter, the boiler must be switched off ("OFF"
position);

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When adding fuel to the tank, the boiler must be switched off (position "OFF");
Do not use flammable liquids to light up the boiler, the boiler should light up automatically
(using a lighter);
When cleaning the boiler, the device must be switched off (position "OFF");
Do not overheat the boiler in any way during operation;
Do not place flammable objects on the boiler and in its immediate vicinity;
When removing ash, flammable materials must not be less than 150 cm from the boiler;
Ash must be placed in heat-resistant vessels with a cover;
When operating the boiler at a temperature lower than 60°C, the steel exchanger may be
retted and thus corroded as a result of low temperature, which shortens the life of the
exchanger; therefore, the temperature during boiler operation must be at least 60°C;
After the end of the heating season the boiler and the smoke duct must be thoroughly
cleaned;
The boiler room must be kept clean and dry.
ATTENTION!
The product is not intended for use by persons with reduced physical/psychological
fitness or lack of experience and knowledge if these persons are not supervised or
instructed by the person responsible for their safety.
ATTENTION!
Any independent interference with the electronics or the boiler structure is
prohibited.
20. Cleaning and maintenance of the boiler
(USER)
ATTENTION!
Cleaning of the boiler may only be carried out with the device disconnected from the
mains.
In order to save fuel, the combustion chamber and convection ducts of the boiler must be kept
clean. In the firebox, the walls and grates must be cleaned through the charging and fire door.
Boiler exchanger and ashtray are also systematically cleaned.
The convection channels (overflowing) and the flue pipe must be cleaned by cleaning on the
boiler flue and at the bottom on the side wall. Cleaning should be carried out using wire brushes
on extension cords. The above actions should be carried out during periodical boiler shutdown,
preferably every 100 hours of boiler operation. Thorough cleaning of the boiler should be done
once a month.
In case of combustion of inferior types of fuels, these actions should be performed more
often.
21. Instructions for decommissioning the
boiler after its lifetime
(USER)
Before scrapping the boiler all electronic components must be disconnected from it. They are
subject to disposal in accordance with the European Directive 2002/96/EC concerning the
consumption of electronic and electrical equipment. For proper disposal, contact the
manufacturer of electronic components according to the above mentioned European Directive.
The steel elements of the boiler must be disposed of in designated places (scrap purchase).
ATTENTION!
The used boiler for scrapping and its components should not be disposed of
together with general waste.
22. Possible faults and malfunctions
(USER)
Before calling the helpline read the FAQ section of the manual.
ATTENTION!
Please remember that in the case of unnecessary customer support, the customer
covers the costs of calling and work of the support unit.
You can also report problems online: www.metalfachtg.com.pl/zglos-problem-online.
HOTLINE: [phone] ext.17

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Question
Answer
Explanation
Smoke escapes from the
backfill or ashtray door
- no draught;
- wrong connection between boiler and chimney;
- the remaining fuel has been hinged or sealed; another stove
installed in the same chimney duct;
- too small a chimney section.
- seal the flue pipe entry of the flue pipe;
- check the chimney's permeability and its parameters;
- check the sealant of the door;
- seal the outlet of the stove to the flue pipe to prevent the suction of cold air;
- enlarge the chimney opening.
During the first start-ups,
water escapes from the boiler
(leakage).
- condensation (boiler sweating).
- We light up the boiler to a temperature above 80OC and keep it at least 6 hours.
If necessary, repeat this operation.
Too low a temperature on the
boiler.
- Incorrectly selected boiler output (size);
- fuel calorific value too low;
- improperly adjusted boiler.
- See chapter on operation and use of the boiler;
- incorrectly selected boiler output.
Sudden increase in
temperature and pressure in
the boiler.
- no sealing of the ashtray chamber;
-Too much chimney section.
- ensure that the doors and clear openings, if any, are tight;
- reduce the cross-section of the chimney, install a glazing.
Leakage of water from
convection channels.
- Bad fuel;
- too low a combustion temperature;
- no air supply through the air dampers;
- exhaust gas throttle closed.
- use a fuel with sufficient calorific value and humidity;
- open the air dampers;
- open the exhaust gas throttles.

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Conformity declaration WE/UE
1. Manufacturer:
METAL-FACH Jacek Kucharewicz
Ul. Sikorskiego 66
16-100 Sokółka
NIP 545-100-10-62
2. Product name and intended use
Solid fuel steel central heating boiler with automatic feeder.
Type SLIM PELLET / SLIM PELLET MINI …………………………………….Manufacturer’s number…………………………………………….. Year of production 20………………………………………
Relevant documents:
1. Directive 2009/125/EC establishing a framework for the setting of ecodesign requirements for energy-related products
2. Electromagnetic compatibility directive -2014/30/UE
3. Directive 2006/42/WE Machinery.
Technical documentation:
1. Norm PN-EN 303-5:2012: Heating boilers for solid fuels, hand and automatically stocked of nominal power of 500 kW.
2. Norm PN EN ISO 12100:2012 Safety of machinery –Basic concepts, principles for design –part 1: Basic terminology, Methodology.
3. Norm PN EN 1708-1:2010 Welding —Basic welded joint details in steel Part 1: Pressurized components
4. Norm PN EN ISO 9606-1:2014-02 Welder Approval Testing.Steel
5. Norm PN-EN 60335-2-102 Household and similar electrical appliances. Safety. General requirements
6. Norm PN EN 60335-2-102:2006/A1:2010 Household and similar electrical appliances. Safety. General requirements of gas, oil and solid fuel burning devices with electrical connections.
7. Norm PN EN 61000-6-2:2008 on electromagnetic compatibility (EMC)-Part 6-3 General norms- Reistance in industrial environments
8. Norm PN EN 61000-6-3:2008/A1:2012 on electromagnetic compatibility (EMC)-Part 6-3 General norms-Emission norms in environments: habitated, retail and of low industry
The product has the marks
Person approving the documentation:
Location: Sokółka Date 08.2021
Jacek Kucharewicz
(Name, Surname, Signature)