Metal-Fach SE MAX II User manual

Technical and operating documentation
SE MAX II
Original instructions, edition 01/2022English language

METAL-FACH Heating Technology
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Table of contents
Introduction 2
Symbols used in the manual 2
Definitions of terms used in the manual 2
Introductory activities 3
General information 4
Application 5
Boiler equipment 6
Basic elements of boiler construction 7
Boiler specifications 10
Boiler dimensions 12
Fuel 14
Requirements for the boiler room and boiler installation 15
Assembly of the boiler 18
Connection of the boiler to the heating system 19
Requirements for the expansion vessel 24
Connection of the boiler to the electrical installation 25
Connecting the boiler to the chimney 25
Commissioning the boiler 27
When using the boiler, remember 29
Cleaning and maintenance of the boiler 30
Instructions for disposal of the boiler at the end of its service life 30
Examples of equipment failure 31
Warranty conditions 33
Confirmation of inspection, warranty repair, maintenance service 36
EC/EU Declaration of Conformity 39
Warranty card 41
Notification of claim 43
Report on the initial start-up of the boiler 45
Report on the initial start-up of the boiler 47

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Introduction
Dear customer, thank you for purchasing METAL-FACH heating boiler. We hope that the operation of the device
will meet your expectations and provide much satisfaction. The heating boiler has been designed and
manufactured in accordance with the applicable norms and standards, guaranteeing safe and reliable
operation. Operation with strict adherence to the recommendations contained in the instructions supplied with
the appliance will ensure optimum 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. Operation by
children is prohibited.
Symbols used in the manual
NOTE!
Very important information, always familiarise yourself with it if it is present.
TIP!
It is worth reading this information, it makes it easier to use.
Definitions of terms used in the manual
(User | Installer)
Central heating boiler - an appliance for burning various types of solid fuels in order to heat the heat carrier
(usually water) circulating in the central heating circuit.
Draught metering device - a device whose function is to regulate the temperature in solid fuel boilers. As the
temperature rises, the air supply to the furnace is reduced, which slows down the combustion of the fuel. As the
temperature falls, the air supply increases, allowing the fuel to ignite again.
Flue draught regulator - used to stabilise and reduce excessive negative pressure in flue pipes.

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Introductory activities
(User)
Activities to be carried out during acceptance of the METAL-FACH boiler:
●Check carefully that the boiler has been delivered complete (Chapter: Boiler accessories) and that it has
not been damaged during transport,
●Compare the rating plate mounted on the boiler casing on the left or right with your order,
●Carefully read the instruction manual - it contains the information you need to use your boiler correctly.
In the case of any problems encountered, please contact the service department or METAL-FACH Jacek
Kucharewicz authorized service staff. These persons have appropriate training and access to original parts,
which enable the proper performance of service and assembly of boilers manufactured by METAL-FACH Jacek
Kucharewicz, confirmed by a certificate issued at the company's headquarters.

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General information
(User)
The Technical and Operational Documentation is one of the parts of the product, it is delivered together with the
purchased central heating boiler. The Technical and Operation Manual contains data on the construction and
assembly as well as the method of operation of the SE MAX II series boilers. Careful reading of this manual
ensures correct and safe use of our boiler.
NOTE!
The user is advised to observe all the instructions concerning the appliance contained in
this Technical and Operating Documentation, the Warranty Conditions and the generally
applicable legal provisions.
The boilers are delivered assembled. They are set up and fixed permanently to the pallet. Additional protection
in the form of foil packaging is used.
When transporting the boiler, it should be secured to prevent it from moving or rotating on the load bed of the
vehicle by means of safety equipment such as belts. The transport of boilers, should be carried out in
accordance with the rules for the transport of materials. Loading and unloading should be carried out using
lifting equipment (forklift) with a lifting capacity of more than 1000 kg.

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Application
(User | Installer)
Steel water boilers are designed for heating water in central heating systems. They are designed to heat residential
facilities such as: single-family and multi-family houses, outbuildings, public utility buildings. Thanks to the application
of modern design solutions, the SE MAX II boiler reaches efficiency of ≤81%. Correct operation and achieving the full
capacity of the boiler depend on the quality of the executed installation, appropriate chimney draught, correct
operation and maintenance of the boiler.
NOTE!
The boilers are designed for operation in open and closed water systems with
gravitational or forced circulation, with safeguards in accordance with the requirements of
the current PN-B-02413 Heating and Heat Engineering standard and closed system in
accordance with PN-EN 12828 Heating installations in buildings. Design.

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Boiler equipment
(User)
The scope of delivery includes both basic and additional components, depending on the order. During
acceptance, the product must be carefully examined to ensure that it has not been damaged during transport
and that the equipment is complete. The elements included in the basic and additional equipment are described
below.
Basic equipment:
Unit of
measurement
Quantity
Central heating boiler
pcs.
1
Ash drawer
pcs.
1
Tools for cleaning the boiler:
●poker
●brush
pcs.
1
Thermometer
pcs.
1
Additional equipment:
Unit of
measurement
Quantity
Draught metering device
pcs.
1
Documentation:
Technical and propulsion documentation for the boiler
pcs.
1
NOTE!
METAL-FACH reserves the right to make changes to the technical parameters,
equipment and specifications of the goods offered without prior notice.

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Basic elements of boiler construction
(User | Installer)
The water body is made as a welded construction from certified steel plates 6 mm P265GH (for components in
contact with the flue gas) and 4 mm (for other components) S235JR+N.
SEMAX II 15kW boiler
1. Boiler casing
2. Thermal insulation
3. Boiler body
4. Fan attachment
5. Supply spigot
6. Flue gas damper
7. Flue
8. Return spigot
9. Blow-up window
10. Water grate
11. Grid doors
12. Thermometer
13. Sockets for temp sensors
14. Air vent spigot
15. Air dispenser
16. Ash grate door
17. Feed doors
18. Clearance doors
19. Drawer
20. Convection channels
21. Secondary air damper

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SEMAX II 20kW boiler
1. Boiler casing
2. Thermal insulation
3. Boiler body
4. Fan attachment
5. Supply spigot
6. Flue
7. Return spigot
8. Blow-up window
9. Movable grate
10. Water grate
11. Grid doors
12. Thermometer
13. Sockets for temp sensors
14. Air vent spigot
15. Lever for the redrawing
16. Air dispenser
17. Ash grate door
18. Feed doors
19. Clearance doors
20. Ash drawer
21. Flue gas damper
22. Convection channels
23. Secondary air damper

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SEMAX II boiler 25-50kW
1. Feed doors
2. Clean-out door
3. Grate doors
4. Ash door
5. Air door
6. Dispenser adjustment knob
7. Secondary air damper
8. Air vent spigot
9. Thermometer
10. Movable grate lever
11. Boiler body
12. Water grate
13. Movable grate
14. Blow-up window
15. Ashtray
16. Flue gas damper
17. Blower duct
18. Blow channel
19. Temperature sensor sleeve
20. Outlet spigot
21. Return spigot
22. Pre-pipe door
23. Boiler insulation

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Boiler specifications
(User | Installer)
Parameters
S.I. Unit.
Boiler model
SE MAX II-
15
SE MAX II-
20
SE MAX II-
25
SE MAX II-
30
Nominal heat output when burning hard
coal
[kW]
15
20
25
30
Heating surface
[m2]
0,85
1,15
1,56
2,19
Area that can be heated
[m2]
80
80-120
150
150-200
Water capacity
[L]
30
41
56
71
Maximum operating pressure
[bar].
1,5
1,5
1,5
1,5
Maximum operating temperature
[°C]
80
80
80
80
Test pressure
[bar].
4
4
4
4
Length of billets
[cm]
Firewood - hornbeam logs (slabs) with moisture
content Wc=15-20%
Calculation flow resistance ΔT
[10K]
0,14
0,23
2,77
8,79
Calculation flow resistance ΔT
[20K]
0,07
0,12
1,19
2,19
Weight of the boiler
[kg]
160
198
260
330
*Boiler weight +/- 5kg.

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Parameters
S.I. Unit.
Boiler model
SE MAX II- 35
SE MAX II- 40
SE MAX II- 50
Nominal heat output when burning hard
coal
[kW]
35
40
50
Heating surface
[m2]
2,27
2,48
2,70
Area that can be heated
[m2]
210-270
270-320
320-380
Water capacity
[L]
87
93
111
Maximum operating pressure
[bar].
1,5
1,5
1,5
Maximum operating temperature
[°C]
80
80
80
Test pressure
[bar].
4
4
4
Length of billets
[cm]
Firewood - hornbeam logs (slabs) with moisture
content Wc=15-20%
Calculation flow resistance ΔT
[10K]
12,88
17,75
26,51
Calculation flow resistance ΔT
[20K]
3,22
4,43
6,62
Weight of the boiler
[kg]
350
370
395
*Boiler weight +/- 5kg.

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Boiler dimensions
(User | Installer)
NOTE!
Boiler feet are present:
- SE MAX II 15 to SE MAX II 50
- Their height is 30 mm.
Dimensions of the SE MAX II 15kW boiler
Dimensions of the SE MAX II 20kW boiler

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Dimensions of the SE MAX II 25-50kW boiler
Typ
e
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
*Dimension does not include the height of the boiler levelling feet.

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Fuel
(User)
The fuel for combustion of boilers of the SE MAX II series is hardwood not exceeding 20% humidity, hard coal of
the OI range.
Hardwoods such as beech, hornbeam, oak, birch, alder and ash are recommended. The use of coniferous wood
is not recommended as it causes burnt boilers and the need for more frequent cleaning.
NOTE!
When using wood with a moisture content of more than 20%, an acid-resistant steel insert
is recommended in the flue pipe.

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Requirements for the boiler room and boiler installation
(User | Installer)
In Poland, boiler houses built for solid fuel should meet the requirements of PN-87/B-02411 "Boiler houses built
for solid fuel" and OJ. 2015.0.1422. They are divided into two types:
1. For small boiler plants up to 25 kW capacity, the following requirements should be met:
●The boiler should be positioned as centrally as possible to the rooms to be heated and in a separate
room;
●The boiler should be placed on a foundation made of noncombustible materials, projecting 0.05 m
above the floor level and edged with steel angles;
●there should be artificial lighting in the room, and natural lighting is also advisable;
●the position of the wheel in the room should allow free access to the boiler for cleaning and
maintenance; the distance from the back 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 height of the
boiler room should be at least 190 cm, with proper ventilation (supply and exhaust);
●Supply ventilation should be by means of an unsealed opening with a minimum cross-section of 200 cm2
and located up to a maximum of 100 cm above floor level;
●the exhaust ventilation should be realised through 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 should be led above the roof and placed near the chimney; there must be no devices
on the exhaust duct allowing to close it;
●the section of the chimney should not be smaller than 20 x 20 cm;
●there should be a floor drain in the floor of the boiler room;
●The optimum place for storing fuel is in a separate room close to the boiler room;
●ash and slag must be collected in suitable containers for daily emptying.
2. Boiler plants with a heat output of 25 kW or more should additionally meet the following requirements:
●The distance of the boiler furthest from the chimney, with gravity draught, must not exceed 50 cm of the
chimney height;
●The fuel store and slag store should be located next to the boiler hall at a storage height of up to 220 cm
with a minimum of 50 cm free space above the fuel;
●facilities and equipment must be included to allow vertical and horizontal transport of fuel and slag;
●the fuel store room shall have natural unforced ventilation, providing for one complete change of air per
hour in the fuel store and three complete changes of air in the slag store;
●the entrance door to the boiler room should be non-combustible (class 0.5 fire resistance), minimum
width 80 cm, opening outwards; it should have a handleless locking system allowing it to open outwards
under pressure, inwards using the handle;
●the ventilation requirements are the same as for boiler rooms with smaller outputs; in addition, in boiler
rooms with outputs in excess of 400 kW there should be, in addition to supply and exhaust ventilation,

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mechanical ventilation, switched on periodically during fuel filling and slagging of the boilers, ensuring a
minimum of 10 full air changes per hour;
●natural lighting should be included in the boiler room, illuminating the boiler from the front, and the
window area should be a minimum of 1/15 of the boiler room floor area; half of those installed should
be operable; electrical lighting and an electrical outlet not exceeding 24 V, should also be provided in the
room;
●there should be a sump in the floor to allow cooling of the water and its capacity should be equal to the
water capacity of the largest boiler, but not more than 2 m3;
●in the boiler room, the thermal pipes should be insulated;
●The positioning of the boiler with the minimum distances required is shown in the boiler room diagram
below.
Minimum distances for positioning the boiler in the boiler room

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NOTE!
Mechanical exhaust ventilation should not be used in the boiler room.
NOTE!
Ensuring that sufficient fresh air flows into the boiler room will enable the fuel to burn
efficiently.
NOTE!
Excessive carbon dioxide in the room should be prevented.
NOTE!
For more detailed information on the requirements for the construction of a boiler room,
see the Decree of the Minister of Infrastructure of 12 March 2009.
TIP!
The aforementioned provisions are guidelines to be reviewed as the regulation is subject
to revision.

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Assembly of the boiler
(User | Installer)
An important part of installation is the correct positioning and levelling of the SE MAX II type boiler, these boilers
do not require special foundations. The boiler must stand vertically.
1. Check that four feet are included.
2. Use a spirit level to level the boiler to the ground. If the boiler is in a horizontal position, the installation
of feet is not required.
3. Screw the four feet into the designated holes.
4. Use a spirit level to align the boiler
Installation of the boiler levelling feet
1. Adjustment foot, pcs. 4
2. Nut M10, pcs. 8
3. Washer Ø10, pcs. 8
NOTE!
An improperly levelled boiler can be damaged.
NOTE!
The return water temperature from the system to the central heating boiler should not be
below 45ºC.