Boilers with feeder for coal
Sigma Uni
Discontinued equipment
DESCRIPTION
Sigma Uni is an automatic boiler that is very convenient in use, is equipped with trough burner and is intended for combustion of eco pea coal. The highest quality of materials used for manufacturing of the burner ensure its long-term operation, while suitable design of the heat exchanger ensures optimum fuel combustion conditions, high efficiency and low pollutant emissions. Intuitive and user-friendly controller with colour touch display, with adjustable angle of inclination allows simple programming of the equipment and is responsible for control of system’s operation.
Boiler meets the power-emission requirements of class 5 of the PN EN 303-5:2012.
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5 years warranty for heat exchanger tightness, 2 years for the remaining components and efficient operation of boiler; |
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Heat exchanger made of certified high-grade boiler steel; |
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High thermal efficiency reaching 90% due to increased heat recovery from flue gases; |
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Controller K1P v4 with colour touch panel servicing four pumps /central heating, domestic hot water, circulation, floor pump/. Servicing of mixing valve. Possibility to control using GSM or INTERNET - extra paid option; adjustable angle of position of control panel; |
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NZ version - adapted for installation in closed system, reinforced design, cooling coil pipe installed - extra paid option; |
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Combustion chamber with highly effective trough burner; |
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Automatic water extinguishing system for fuel suppression with thermostatic valve “FIRE FIGHTER”; |
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Sensor indicating opening container’s cover; |
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Coil of endless screw in the fuel feeder made of one piece; |
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Change of direction of boiler door’s opening (not applicable to internal glow doors); |
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ADAPTIVE CONTROL control - adjustment of boiler operation based on air flow through the heat exchanger; |
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Energy-saving motoreducer with high efficiency with automatic reverse in case of locking of fuel feeder; |
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Ceramic catalysts stabilising combustion process; |
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Version R - Fuel self-ignition system (extra payable option); |
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Version F - System for mechanical cleaning of heat exchanger - extra payable option; |
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Pressure equalisation system in fuel container; |
| Version F - System for mechanical cleaning of heat exchanger - extra payable option; |
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Specification / boiler type |
unit | 16 | 20 | 24 | 36 | 48 |
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Fuel |
- | eco-pea coal 5-25 mm | ||||
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Power range |
kW | 4,8-16 | 6-20 | 7,2-24 | 10,8-36 | 14,4-48 |
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Heating area |
m2 |
2,1 | 2,3 | 2,4 | 3,8 | 4,7 |
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Area of heated rooms 1 |
m2 |
to 250 | to 270 | to 290 | to 400 | to 520 |
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Capacity of fuel container 2 |
kg | ~165 | ~165 | ~165 | ~191 | ~266 |
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Optimum thermal efficiency |
% | ~88,8-88,9 | ||||
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Energy efficiency class |
- | B | B | C | C | B |
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Max. permissible work pressure |
bar | 1,5 - opened system, 2,5 - closed system | ||||
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Required flue gas draught |
Pa | 24 | 26 | 28 | 31 | 34 |
| Water temperature on supply max. | °C | 65/85 | ||||
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Boiler weight 3 |
kg | 462 | 513 | 529 | 669 | 735 |
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Boiler water tank capacity |
l | 97 | 100 | 114 | 160 | 196 |
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Chimney section |
cmxcm | 14x14 | 16x16 | 16x16 | 18x18 | 22x22 |
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Chimney section |
Ø mm |
160 | 180 | 180 | 200 | 250 |
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Minimum chimney height |
m |
6 |
7 |
7,5 |
9 |
10 |
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Supply and return socket diameter |
mm |
G1 ½” |
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Diameter of the exhaust gas socket |
mm | 159 | 178 | 178 | 178 | 194 |
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Supply |
V/Hz |
~230/50 |
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1 Maximum area of heated rooms estimated for unit heat demand q=80 W/m2.
2 Fuel tank capacity for bulk density of eco-pea coal equal to 0,8 kg/dm3.
3 Boiler weight depends on its additional equipment.
Height of boiler can be additionally adjusted by means of provided levelling legs.
The regulation of legs varies from 38 to 50 mm.
