Metal-Fach SMART EKO-CARBON Series, Operation And Maintenance Documentation, Page: 9 / 38

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9. Control and safety
(USER/INSTALLER)
1) Automatic control of the boiler can adjust:

boiler temperature
 hot water temperature

fuel feeder operation time

feeder and vent manual control time
2) Temperature sensor
The STB mechanical protection is situated inside the boiler and prevent the heating system
from overheating. it is set by default at 95
o
C. if temperature exceeds 95, the vent is turned off. at
the same time central heating hot water pumps come on and the mixer valve opens.
10. Fuel
(USER)
The fuel for firing boilers equipped with a wormscrew feeder and retort burner is:
1) Grade II class a1 hard coal compliant with section 5.3 (Table 7) of standard PN EN 303-
5:2012

calorific value: > 26MJ/kg;
 moisture: 11% in working condition;

ash content: 2 - 7 % in working condition of mass in dry state;
 volatile element content: 15 -30% in working condition of mass in dry state;
11. Requirements for the boiler room and
boiler installation
(USER/INSTALLER)
In Poland, all the soild fuels boilers should be made in accordance with PN- 87/B-02411 Norm
„Soild fuels boilers”. The have been divided into two categories.
1)
For small boilers under 25 kW, the following requirements should be met:

the boiler should be placed in the central position to the heated rooms and in a seperate
room.
 the floor surface should be inflammable. If the floor is flammable, it should be covered
with steel metal sheet of 0,7 mm thickness and exceed the boiler contour by at least 50
cm. the boiler should be placed on inflammable base of 0,05 m above the floor and
secured by steel angles.

the boiler room can be lit naturally as well as artificially.

the location of the boiler in the room should enable free access to the boiler during
cleaning and maintenance works. The distance between the back of the boiler and a wall
should be at least 70 cm, the side of the boiler and a wall should be at least 100 cm and
the front of the boiler and a wall opposite should be at least 200 cm;
 the height in a new building should be at least 220 cm. in old buildings the the boiler room
should be at least 190 cm high as long as the ventilation inside is sufficient (supply-
exhaust ventilation)

supply ventilation should be provided by an open slot of 200 cm2 in diameter and placed
up to 100 cm over the floor surface.
 the exhaust ventilation should be provided by an exhaust duct of 14 x 14 diameter and
made from noncombustible material. Its outlet should be installed under the ceiling of the
boiler room. The exhaust duct should lead out over the roof and placed in the close vicinity
of the chimney. No shut down equipment can be installed on the duct.
2) Boiler rooms of heating power greater than 25kW should meet extra requirements, such
as:
 the distance to the far-most chimney, at gravitional draught, cannot exceed 50 cm of the
chimney height.

the fuel and slag store should be located by the boiler room. The storing height up to 220
cm with a 50 cm free space above it.

the equipment for vertical and horizontal delivery of the fuel and slag should be
considered.
 the fuel store should be equipped with natural ventilation that allows for full airing once an
hour in the fuel store and three airing circles an hour in the slag store.

the entrance door to the boiler room should be fire- resistant (0,5 class of fire resistance),
the minimum width 80cm and should open outside. the door should have a handle- free
system when opened from the inside and have a door handle when coming inside
 the requirements for the ventilation are the same as those for the boiler rooms of lower
power; additionaly, in the boiler rooms of power greater than 400 kW, the supply exhaust
ventilation should be accompanied by mechanical ventilation that can be periodically
activated when feeding the fuel and removing slag. it must also be able to provide 10 airing
circles an hour

natural lightning which can light the front of the boiler should be considered in the room.
the total surface of the windows should equal at least 1/15 of the floor surface; half of the
windows in the room should open; the electrical lightining and electrical socket of max. 24
V should also be located in the room
 inspection chamber that will allow cooling water should be located in the floor; its capacity
should equal the water capacity of the biggest boiler but not exceed 2m3

in the boiler room all the heating pipes should be insulated
 The placing of the boiler together with the minimum distance requirements is presented in
the boiler room (Schematic 11.1)
ATTENTION!
The mechanical exhaust ventilation should not be used in the boiler room
ATTENTION!
Correct fresh air infeed to the boiler room will ensure efficient fuel burn.
ATTENTION!
Ensure that the carbon dioxide level in the room is not too high.