Metal-Fach Slim Pellet 10 Operator's manual

METAL-FACH Heating Technology
1
Table of contents
Introduction 2
Symbols used in the manual 2
Introductory acts 3
General information 4
Application 5
Boiler equipment 6
Basic elements of boiler construction 7
Technical data of SLIM PELLET boiler 10
Technical data of SLIM PELLET MINI boiler 11
Dimensions of SLIM PELLET boiler 12
Dimensions of SLIM PELLET MINI boiler 14
Safety automation and control 16
Fuel 17
Requirements for the boiler house and boiler installation 18
Boiler installation 21
Connection of the boiler to the heating system 23
Connection of the boiler to a closed heating system 31
Protection of the installation by means of an external cooling coil 32
Protection of the installation by means of a dual-circuit cooling valve 33
Requirements for the expansion vessel 36
Boiler connection to the electrical installation 37
Connection of boiler to chimney 40
Boiler start-up 41
When using the boiler, remember 43
Cleaning and maintenance of the boiler 44
Instructions for disposal of the boiler at the end of its service life 45
List of spare parts 46
Examples of equipment failure 47
Warranty conditions 49
Confirmation of inspection, warranty repair, maintenance service 52
EC/EU Declaration of Conformity 55
Warranty card 57
Notification of complaint 59
Report on the first start-up of the boiler 61
Report on the first start-up of the boiler 63

METAL-FACH Heating Technology
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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 applicable norms and standards, which guarantee safe and reliable operation.
Operation of the boiler in strict observance of the instructions included in the manual attached to the device will
ensure optimal and reliable operation of the central heating boiler for many years. The product is not intended
for use by persons of diminished physical / mental capacity or lack of experience and knowledge, if such
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 read it if it is present.
TIP!
It is worth familiarising yourself with this information, it makes it easier to use.

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

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General information
(User)
The Operation and Technical Manual is one of the product parts which are supplied together with the purchased
central heating boiler. The Operation and Technical Manual contains information about the design, installation
and method of operation of boilers with self-cleaning pellet burner of the SLIM PELLET and SLIM PELLET MINI
series. Careful reading of this manual ensures correct and safe operation of our boiler.
NOTE!
The user is advised to observe all instructions regarding the appliance contained in this
Operation and Maintenance Manual, the Warranty Conditions and the generally applicable
legal provisions.
The boilers are delivered in an assembled condition. They are set up and fixed permanently to a pallet.
Additional protection in the form of foil packaging is used.
When transporting the boiler, it is necessary to secure it against shifting or rotation on the truck body by means
of securing devices, e.g. belts. The transport of boilers should be carried out in accordance with the rules
concerning the transport of materials. Loading and unloading should be carried out with lifting devices (forklift)
with a lifting capacity of more than 1000 kg.

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Application
(User | Installer)
The boilers are designed for heating residential buildings such as: single-family and multi-family houses, farm
buildings, public utility buildings, and domestic hot water. They are equipped with an automatic fuel feeding system.
Thanks to the use of modern construction solutions the boilers of SLIM PELLET and SLIM PELLET MINI series reach
efficiency of ≤90%. Correct operation and achieving the full potential of the boiler depend on the quality of the
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 gravity or
forced circulation, with safeguards in accordance with the requirements of the current
standard PN-B-02413 Heating and Heat Engineering 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 elements, depending on the order. Upon receipt, the
product must be carefully inspected to ensure that it has not been damaged during transport and to check 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
Microprocessor controller
pcs.
1
Fuel feed system with self-cleaning pellet burner
cpl.
1
Fuel tank
pcs.
1
Tools for cleaning the boiler
pcs.
1
Boiler levelling feet
pcs.
4
Additional equipment:
Unit of
measurement
Quantity
LAMBDA SONDA* module
pcs.
1
Documentation:
Unit of
measurement
Quantity
Technical and propulsory documentation of the boiler
pcs.
1
Operating instructions and warranty card for the controller
pcs.
1
Operating instructions and warranty card for the blower fan
pcs.
1
NOTE!
The user should carefully read the operating instructions for the controller, fan and
feeder together with the self-cleaning pellet burner.
NOTE!
METAL-FACH reserves the right to introduce changes to the technical parameters,
equipment and specifications of the offered goods without prior notice.

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Basic elements of boiler construction
(User | Installer)
SLIM PELLET and SLIM PELLET MINI are boilers with an automatic burner for biomass in the form of wood
pellets. The boiler is made of certified steel sheets P265GH (for furnace components), S235JR (for water jacket
components) and heat resistant steel (burner components exposed to direct flame impact). The boiler
exchanger is a flame-tube construction with two horizontal flue gas passages. In the lower part of the body,
there is a flame tube which serves as a combustion chamber, in which a self-cleaning pellet burner is installed.
The automatic feeder delivers fuel from a hopper which is located above the exchanger (in SLIM PELLET version),
or stands independently on the side of the exchanger (SLIM PELLET MINI version). The electronic regulator
smoothly controls the operation of the burner and pumps in the heating system.

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SLIM PELLET boiler
1. Exchanger
2. Self-cleaning pellet burner
3. Fuel tank
4. Furnace and ash door
5. Flue pipe
6. Flue
7. Supply spigot
8. Return spigot
9. Drain stub
10. Boiler temperature capillaries and STB
11. Flue gas sensor capillary
12. Ash drawer
13. Flexible fuel feed pipe
14. Feeder
15. Controller display
16. Main switch
17. Fuse
18. STB
19. Hopper cover
20. Cable output
21. Exhaust

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SLIM PELLET MINI boiler
1. Exchanger
2. Self-cleaning pellet burner
3. Fuel tank
4. Furnace and ash door
5. Flue pipe
6. Flue
7. Supply spigot
8. Return spigot
9. Drain stub
10. Boiler temperature capillaries and STB
11. Flue gas sensor capillary
12. Ash drawer
13. Flexible fuel feed pipe
14. Feeder
15. Controller display
16. Main switch
17. Fuse
18. STB
19. Hopper cover
20. Cable output
21. Exhaust

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Technical data of SLIM PELLET boiler
(User | Installer)
Parameters
S.I. Unit.
Boiler model
SLIM PELLET 10
SLIM PELLET 15
SLIM PELLET 20
Nominal heat output
[kw].
10
15
20
Boiler output range
[kw].
3-10
4,5-15
6-20
Heating surface
[m2]
1,5
2,1
2,5
Water capacity
[L]
45
65
75
Maximum operating pressure
[bar].
3
3
3
Maximum operating temperature
[°C]
80
80
80
Test pressure
[bar].
4,5
4,5
4,5
Boiler class
[-]
5
5
5
Boiler efficiency
[%]
89,3
90,4
89,2
Fuel tank capacity
[L]
120
160
180
Fuel
[-]
Wood pellets of class C in accordance with pt. 5.3
(Table 7) of PN EN 303-5:2012 standard:
(diameter: 6 ± 1 mm; 8 ± 1mm, length 3.15 ≤ L ≤ 40,
moisture content ≤ 12%, ash content ≤ 0.5%, calorific
value >17 MJ / kg)
Electrical connection
[-]
~230V; 50Hz; 2A
Electrical power consumption
[W]
115
115
115
Electric power consumption
(instantaneous at start-up)
[W]
415
415
415
Setting range of temperature controller
[°C]
60-80 (in 1°C steps)
Required chimney draught
[Pa]
20
23
26
Exhaust mass flow
[g/s].
6,23
9,50
12,36
Design flow resistance ΔT [10K]
[mbar].
2,38
3,58
4,77
Design flow resistance ΔT [20K]
[mbar].
1,19
1,79
2,39
Boiler weight
[kg].
260
310
-

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Technical data of SLIM PELLET MINI boiler
(User | Installer)
Parameters
S.I. Unit.
Boiler model
SLIM PELLET
MINI 10
SLIM PELLET
MINI 15
SLIM PELLET
MINI 20
Nominal heat output
[kw].
10
15
20
Boiler output range
[kw].
3-10
4,5-15
6-20
Heating surface
[m2]
1,5
2,1
2,5
Water capacity
[L]
45
65
75
Maximum operating pressure
[bar].
3
3
3
Maximum operating temperature
[°C]
80
80
80
Test pressure
[bar].
4,5
4,5
4,5
Boiler class
[-]
5
5
5
Boiler efficiency
[%]
89,3
90,4
89,2
Fuel tank capacity
[L]
230
230
230
Fuel
[-]
Wood pellets of class C in accordance with pt. 5.3
(Table 7) of PN EN 303-5:2012 standard:
(diameter: 6 ± 1 mm; 8 ± 1mm, length 3.15 ≤ L ≤ 40,
moisture content ≤ 12%, ash content ≤ 0.5%, calorific
value >17 MJ / kg)
Electrical connection
[-]
~230V; 50Hz; 2A
Electrical power consumption
[W]
115
115
115
Electric power consumption
(instantaneous at start-up)
[W]
415
415
415
Setting range of temperature controller
[°C]
60-80 (in 1°C steps)
Required chimney draught
[Pa]
20
23
26
Exhaust mass flow
[g/s].
6,23
9,50
12,36
Design flow resistance ΔT [10K]
[mbar].
2,38
3,58
4,77
Design flow resistance ΔT [20K]
[mbar].
1,19
1,79
2,39
Boiler weight
[kg].
270
305
345

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Dimensions of SLIM PELLET boiler
(User | Installer)

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Type
SLIM PELLET 10
SLIM PELLET 15
SLIM PELLET 20
A
-
-
-
B
590
590
690
C
1550
1550
1550
C1
-
-
-
D
705
920
920
E
1510
1510
1510
E1
850
850
868
F
656
656
656
G
G3/4''
G3/4''
G3/4''
H
G1 1/4''
G1 1/4''
G1 1/4''
I
160
160
160
J
G1 1/4''
G1 1/4''
G1 1/4''
K
200
200
200
L
130
130
130
M
-
-
-
N
-
-
-
O
870
1090
1090
P
1250
1465
1465
R
162
162
162
*Dimension does not include the height of the boiler levelling feet.

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Dimensions of SLIM PELLET MINI boiler
(User | Installer)

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Type
SLIM PELLET MINI 10
SLIM PELLET MINI 15
SLIM PELLET MINI 20
A
1200
1200
1300
B
590
590
690
C
1020
1020
1020
C1
1270
1270
1270
D
705
920
920
E
905
905
905
E1
850
850
868
F
656
656
656
G
G3/4''
G3/4''
G3/4''
H
G1 1/4''
G1 1/4''
G1 1/4''
I
160
160
160
J
G1 1/4''
G1 1/4''
G1 1/4''
K
200
200
200
L
130
130
130
M
605
605
605
N
605
605
605
O
870
1090
1090
P
1250
1465
1465
R
162
162
162
*Dimension does not include the height of the boiler levelling feet.

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Safety automation and control
(User | Installer)
1. Boiler automatics enables setting:
●boiler temperature;
●the hot water temperature;
●fuel feeder operation;
●manual control of the feeder fan.
2. Thermal sensor
Mechanical STB protection is located in the boiler and protects the heating system from overheating. It is set at
95oC. Above this temperature it switches off the fan, switching on the central heating and hot water pumps, as
well as two additional ones, and opens the mixing valve.
3. A rising screw feeder feeding fuel to the burner.

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Fuel
(User)
The fuel for boilers equipped with a self-cleaning pellet burner is:
Wood pellets of class C in accordance with pt. 5.3 (Table 7) of PN EN 303-5:2012 standard:
●diameter: 6 ± 1mm; 8 ± 1mm;
●length 3,15 ≤ L ≤ 40;
●moisture content ≤ 12%;
●ash content ≤ 0.5%;
●calorific value >17 MJ/kg;
The fuel should not contain stones, pieces of wood or other impurities.

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Requirements for the boiler house and boiler installation
(User | Installer)
In Poland, boiler houses built for solid fuel should meet the requirements of the PN-87/B-02411 standard "Boiler
houses built for solid fuel" and OJ. 2015.0.1422 These 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 placed as centrally as possible to the rooms to be heated and in a separate room;
●The material of which the boiler room floor is made should be non-flammable; in 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-flammable materials,
protruding 0.05 m above the floor level and edged with steel angles;
●there should be artificial lighting in the room, natural lighting is also advisable;
●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 existing buildings the height of the boiler room
is 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 placed up to a maximum of 100 cm above floor level;
●exhaust ventilation should be carried out with an exhaust duct made of non-flammable material,
minimum cross-section 14 x 14 cm, with an inlet opening under the boiler room ceiling; the exhaust duct
should be led above the roof and placed close to the chimney; there must be no devices allowing to
close it on the exhaust duct
●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 optimal place for fuel storage is a separate room close to the boiler room;
●ash and slag must be collected in suitable containers which can be emptied daily.
2. Boiler houses with a heat output of 25 kW and over shall in addition meet the following requirements:
●The distance of the boiler furthest from the chimney, for gravity draught, must not exceed 50 cm of
chimney height;
●Fuel storage and slag storage 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 provided to allow vertical and horizontal transport of fuel and slag;
●Fuel storage rooms shall have natural unforced ventilation, providing for one complete change of air per
hour in the fuel storage room and three complete changes of air in the slag storage room;
●the entrance door to the boiler room shall be non-combustible (class 0.5 fire resistance), minimum width
80 cm, opening outwards; it shall have a handleless locking system enabling it to be opened outwards
under pressure and inwards using a handle;
●ventilation requirements are the same as for boiler houses of smaller capacity; in addition, in boiler
houses whose capacity exceeds 400 kW, in addition to supply and exhaust ventilation, there should be