7
The pressure parts of boiler correspond to the strength requirements according to:
EN 303-5
Heating boilers – Part 5: Heating boilers for solid fuele, hand and automatically stocked, nominal
heat output of up to 300 kW – Terminology, requirements, testing and marking
The main part of the boiler is a boiler body (3-sectional, 4-sectional), that stands on a welded pedestal made
from steel sheets. There are turbulators in the channels of the cast iron body. In case of any necessity of
boiler draught increase, for flue gas temperature reduction a number of turbulators can be reduced. The
burner with a mixer is placed under the cast iron body (fig. no. 3), that is formed by cast iron grate, ceramic
plates, arc and retort. Fuel supply is provided from reservoir with a screw feeder through retort on the cast
iron grate. Ceramic plates regulate burning, they reduce a dustness, they baffle a heat back to the burner and
abet to a complete combustion.
There is place under the combustion chamber the ashtray. Beside the boiler there is placed the fuel reservoir,
joining to the screw conveyor equipment.
The combustion air fan is placed in front of the fuel reservoir and is connected to the burner. The heating
water inlet and outlet is placed in the back part of boiler and it is made of two flanges with external threads
G 1 ½”, for the connection to the heating system. There is a sealing between the boiler and flange made from
temafast
Ø
60 x 48 x 2 mm. The threaded terminal G ½” serves for installation of discharging cock. The
smoke adapter to flue gas exhaust to the chimney is placed in the back upper part of boiler.
All parts (boiler shell, pedestal) are insulated by health harmless mineral insulation which reduces the losses
caused by the heat transmission to the environment.
The boiler shell is coated by by the high quality komaxit.
The boiler is made either in left-hand or right-hand version.
Fig. no. 3a) Burner with mixer (fuel – lignite and hard coal)
Fig. no. 3b) Burner with mixer (fuel – wood pellets)
1 – Mixer
2 – Retort
3 – Countersunk screw with internal
hexagon M8 x 20
4 – Cast iron grate (small diameter)
5 – Sealing
6 – Cap
7 – Washer 8,4
8 – Screw M8 x 20
1 – Mixer
2 – Retort
3 – Setscrew with internal hexagon
M12 x 16
4 – Countersunk screw with internal
hexagon M8 x 20
5 – Cast iron grate(large diameter)
6 – Sealing
7 – Cap
8 – Washer 8,4
9 – Screw M8 x 20
