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ASTER - boilers with automatics (12-50 kW)

Information
Specifications
Furnace
Control
Configurations
Gallery

Information

ASTER central heating boilers with a coal burner are low-temperature boilers designed for heating up water in central heating systems up to the temperature of 80°C at the outlet, at the maximum pressure of 1,5 bar

They are produced with the capacity of 12 - 50 kW. They are used in both gravity and pump central heating and hot water installations. They are designed for one or multi family residence buildings, public buildings, such as schools, offices, trade buildings, production buildings and many others. Due to their small size, ASTER central heating boilers can be used in small boiler rooms, in which it is impossible to install a big- sized central heating boiler.

ASTER central heating boilers are equipped with an automatic fuel feeding and air dosing system, and also with a fuel tank. Due to the application of a retort burner with wide operating range (25 - 100%), the most economic constant combustion system has been obtained. Fuel transport from the tank to the retort burner is carried out with a feeding screw. ASTER central heating boilers are characterized by almost smoke- free fuel combustion which results in low emission of harmful substances and dusts.

Advantages of ASTER central heating boiler:

easy installation and maintenance,
hot water is available 24h a day throughout the year,
clean operation, order in the boiling room,
fast, easy and comfortable loading of fuel into the intake hopper,
automatic fire maintenance process,
ergonomic control panel location which prevents children from access,
possible temperature adjustment from the flat due to application of room thermostat (option).

Combusted fuel from the burner:

pea-coal

fine coal

pea-coal
/ pellet

pea-coal
/ oat

Grilled fuel burned:

coal

briquette

wood

Specifications

Detailed list		Technical specifications of ASTER
Type		12	15	19	25	38	50
Rated power	kW	12	15	19	25	38	50
Power range	kW	2-12	4 - 15	6 - 19	8 - 25	12 - 38	15 - 50
Heating area	m²	do 90	do 130	130 - 150	150 - 200	200 - 300	300 - 400
Thermal efficiency	%	81,8 - 90,4
Maximum water temperature	°C	80
Minimum temperature of return	°C	55
Maximum working pressure	Bar	1,5
Fuel consumption at rated power	kg/h	2,5-3,0	3,0 - 3,5	3,0 - 4,0	4,0 - 5,0	5,5 - 7,5	5,5 - 8,5
Filling up hopper capacity	kg	100	110	130	130	200	200
Required burnt gas draught	Pa	20 - 25
Chimney hole diameter	cm²	280
Height of chimney	m	4	4	5	6	8	8
Water storage capacity	dm³	60	70	103	123	153	179
Flue diameter	mm	160	160	160	160	160	180
Diameter of supply and return connecting pipe	cal	GZ 2"
Overall dimensions: - width D - height H - depth G - height F	mm	1120 1070 840 910	1120 1170 840 1010	1245 1340 885 1120	1245 1340 935 1120	1295 1340 1110 1130	1295 1545 1110 1320
Overall dimensions - exchanger: - width - height - depth	mm	540 1070 585	540 1170 585	540 1340 640	540 1340 690	635 1340 845	635 1510 845
Filling up hopper dimensions: - width - height - depth	mm	560 700 595	560 800 595	660 940 590	660 940 590	660 990 790	660 1140 790
Boiler weight without water	kg	260	280	350	380	482	542
Power consumption	W	34	34	34	34	34	80
Supply voltage	V	230
Clearance on store tank side	mm	450		500

Control

Device task is an automatic blown-in steering in the central heating boiler and switching on the pumps: circulation, domestic hot water and floor pump in a central heating system. Adjuster cooperates with the boiler screw feeder.

Steering process is carried out through the water temperature control in the central heating boiler.

Adjuster has two modes:

Operation mode (when the central heating temperature is lower than set-point)
Maintain mode (when the central heating temperature is equal or higher than set-point)

Adjuster enables to maintain the set temperature of domestic hot water as well as keeps the inside temperature of building. Adjuster requires settings change due to fuel diversity and boiler type.

Boiler configurations

In the advanced boiler configuration we offer a few options:

we offer a selection of the location of the feeder from the left-hand / right-hand side of the boiler
we offer a selection of opening the door to the left / to the right
we offer a selection of the diameter and kind of power and return connectors
we offer a selection of the location of the power and return connectors
we offer a selection of the shape and location of the boiler flue, e.g. elbow to the left, to the top etc.

1. The output of the flue
from the back
shifted to the left.

2. The output of the flue
from the back in the middle.

3. The output of the flue
from the back
shifted to the right.

4. The output of the flue
from the back
(the elbow to the left).

5. The output of the flue
from the back
(the elbow to the right).

6. The output of the flue
from the top
(the elbow to the left).

7. The output of the flue
from the top
(the elbow to the left).

8. The output of the flue
from the top
(the elbow to the right).

9. The output of the flue
to the top.

The shape of the flue

The shape of the flue can be selected in accordance with the customer’s expectations. We offer the circular shape / the square shape / the rectangular shape.