6
so it is not replaceable. Between water grate there are cast iron movable
grates (pos. 11
2
). Under a heat exchanger, on its entire section, there is an
ash pan chamber. There is an opening for combustion chamber cleaning (pos.
24)on the sidewall. At the upper part of boiler, under the cover (pos. 19),
there is a flap of combustion chamber (pos. 20), which during boiler’s work,
transfers gases into a channel placed between water partitions to the smoke
conduit (pos. 21). It also enables easy access to combustion chamber, when
cleaning operations take place. To the upper part of a heat exchanger the
hot water connector is welded (pos. 23). Blowdown connection (pos. 25) is placed
on the lateral wall.
Traditionally, fuel charge door (pos. 5), furnace door (pos. 6), and ash box door
(pos. 8), are placed on the front wall of the boiler. Use of these door enables
easy access when combustion and ash pan chambers cleaning is considered.
Fumes are carried out to a chimney through the smoke conduit (pos. 21)
placed at the back side of a boiler. The smoke conduit is equipped with
mounted smoke throttle (pos. 26), rendering draught regulation. On the smoke
conduit backside, there is a smoke conduit cleaning hole (pos. 22).
The entire heat exchanger’s construction is wrapped with insulation material (pos.
2), a mineral wool, which fill the space between the heat exchanger and boilers
casing (pos. 1).
Water temperature in a boiler may be read by use of the electronic controller (pos.
15), attached to the boiler. Due to simple and proved over many years
design, these boilers are reliable and easily operable.
Operation of boilers is based on forced air admission, what is performed by
platform fan(pos. 16, depending on size, boiler may be equipped with one or
two fans), operated by electronic controller(pos. 15) connected to mains.
Basic energetic parameters are structured in the table (p. 11-12) and on the drawing
(p. 13-14).
Basic fuel for heating boilers of SAS MI type is a black coal for energetic
applications namely fine coal (KL 27/10) with max. humidity of 25% . This
fuel is proper for obtaining the declared power. Application of fuels, other than
recommended, may lead to reduced capacity (heating capacity of boiler) and
reduced time of slow combustion.
2
Does not apply to boilers of power above 36kW
5. FUEL
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