7
5.2.
ALTERNATIVE FUEL
The alternative fuel for coal heating boilers of SAS NWT type is a mixture of the black coal
grades as follows: 70% of coal the nut grade ( class 24/12 acc. to above mentioned norm)
and 30% of coal the fine coal grade (class 21/15 acc. to above mentioned norm). These
boilers are also fit fir combusting long flame fuels, such as: brown coal and wood in different
forms, e.g. chips, silver, shavings, etc.
The wood has to be seasoned at least one year! Wet wood combustion lowers the
efficiency and the lifetime of a boiler. It also obstructs the declared power for slow
combustion sustainment. For this type of boiler it is not recommended to relay only on the
fine coal.
Boiler’s assembling should be performed by qualified and authorized personnel
(qualified person upon adequate training and authorized for performing maintenance and
repair works).
The fitter’s obligation is to get familiar with the product, its functioning and
protection systems functionality.
Prior to boiler’s assembling it is strictly necessary to get familiarized with the
content of hereby
Technical-Start-Up Documentation.
6.1.
REQUIREMENTS FOR BOILER-ROOM
The boiler room, where the heating boiler for central heating installation shall be
installed, must conform
the requirements of detailed regulations being in force, at the
country of destination (e.g. PN-87/B-02411).
In particular, the following requirements shall be fulfilled:
the boiler rooms should be located as centrally as possible to rooms which are
covered with heating system, and the boiler itself should be placed as close as
possible to chimney (chimneys),
boiler room entrance door should be opened on the outside, and be made of
inflammable materials,
the boiler room should have air blow-in ventilation, a channel with section no
less than 50% of the chimney section, but not less than 21 x 21 cm, with
the exit at the back part boiler’s room , (lack of such ventilation or obstruction may
cause: smoking, inability to get higher temperature),
the boiler room should have air blow-out ventilation under room’s ceiling with
section no less than 25% of the chimney section, but not less than 14 x 14 cm
(the purpose of this system is to carry out harmful gases).
NOTE: Employing of mechanical blow-out ventilation is unacceptable.
The boiler room should be provided with day and artificial lighting.
6. BOILER’S ASSEMBLY GUIDELINES
