• Vigas
Vigas 25–80kW Log Fired Central Heating Boilers
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Vigas Ireland are pleased to offer the full range of Vigas log fired central heating boilers. There are four models ranging from 25kW to 80kW in nominal output. In addition, there is a 25kW air heater model suitable for workshops. All of the boilers employ the latest “gasification down burning” technology and have sophisticated electronic controls that ensure maximum efficiency and minimum emissions. All models comfortably exceed the best performance class of EN303-5, the British Standard governing solid fuel boilers. This is true both for efficiency and emissions. |
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Vigas Boiler |
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The specification for the model 25 is as follows:
Technical discription for Vigas boilers:
A woodfired Central Heating operates according to the same principles as a normal gas and oil fired Central Heating Systems with Thermoregulators and room thermostats.
Thermal boilers, Vigas 25, 40, 60, 80 are designed for combustion of dry wood material, starting from sawdust up to logs in the length according to the dimensions of the gasification chamber, maximum 20 cm diameter. Sawdust, chippings, splinters and cuttings must be burnt mixed in with logs. Thermal boiler Vigas UD 29 is designed for burning browncoal. Its also possible to burn dry firewood as a substitute fuel.
The boilers are welded from steel sheets, boilerparts in contact with boiler gases 6 mm thickness and other parts out of 4 mm sheets. The heat exchanger is welded from steel pipes, 57 x 5 mm. The outer body is made of 0.8 mm sheet, insulated with 20 and 40 mm Nobasil. The boiler exhaustflange sizes are 159 and 196 mm depending on type of boiler.
Inside the boiler is a gasification chamber/ fuelbox where the fuel is dried and gasified. The created gas, under pressure of forced air feeds through the fire concrete nozzle into the combustion chamber for secondary combustion. This happens at temperatures up to 1200 C. After this the hot gases are led through the heat exchanger where they change their heat to water, after which they leave the chimney.
The boilers are equipped with a lighting up damper to avoid fumes escaping from the fuelbox when refilling.
The boiler complies with the requirements for non demanding operation, therefore its equipped with the AK 2000 electronic control unit on the top.
The AK 2000 arranges to:
• smooth and automatic control of forced draft fan according to
required output and fuel
• to connect a circulation pump
• to connect and control the boiler by room thermostat
• to connect and control an exhaust extractor
• to connect an expander to control individual heating circuits
• to set the mode of heating ( TURBO or EKO )
• to set required temperature and real time
• to control heat output during heatcycle and the time you want your
spaces heated
• to set and match 10 programs for different days of the week
• to set the required language
• to display ” boiler shut down”
• to display “heated space”
The boilers have a thermal fuse to disconnect the forced air fan if boiler overheats above 95
Cross section of the Vigas boiler:
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1. Controller |
11. Door handle |
21. Thermal fuse |
2. Upper door |
12. Secondary combustion chamber |
22. Heat exchanger |
3. Chimney damper handle |
13. Bottom door |
23. Heatproof concrete filling |
4. Fuel chamber |
14. Chimney neck |
24. Secondary air intake |
5. Primary air supply |
15. Heat exchanger |
25. Fire bricks |
6. Fan flap |
16. Lighting up damper |
26. Direction of waste gases |
7. Fan |
17. Upper back cover |
27. Return central heating |
8. Fan cover |
18. Outlet hot water |
28. Boiler fill / drain plug |
9. Fire proof nozzle |
19. Upper front cover |
29. Cleaning plate |
10. Secondary air screen |
20. Thermometer |
30. Cleaning scraper |
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31. Cleaning hook |
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Operation of the Vigas boiler:
Vigas wood gasifying boilers are constructed in such a
way that all components will be gasified. |
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The hot combustion gases exchange their heat to the heat exchanger. The Vigas boilers can be filled with the following wood length sizes: Due to the high yield of the boiler and the large wood chamber only few refills are required. As all materials are gasified and due to the high efficiency almost no ash remains in the combustion chamber. The boiler is provided with a cooling coil in order to prevent overheating.
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Vigas 25 |
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Because of the enormous heat output of these boilers within a relative
short space of time the incorperation of of a buffertank (accumulator tank)
into the heating system is inevitable.
We recomment a buffercapacity of 70 to a 100 litres per kW boiler output,
this is to get as high an efficiency as possible from your heating system
,at a greater convenience.
The AK 2000 electronic control system for the Vigas boilers:
The AK 2000 electronic control system is the controlling unit of the Vigas boilers. Its simple system controls all of the main functions of the boiler, but in addition may be expanded to control extra heating circuits as required. In its most basic form the AK 2000 will control the central heating pump, the room thermostat and the variable speed air induction fan. |
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The AK 2000 unit is able to control a programme of both
heat and time for a whole week. It will indicate when fuel is low or when
the boiler has closed down. Should a malfunction occur the AK 2000 unit
is able to carry out a self-analysis fault programme displaying the relevant
problem. Should another control unit be added it is even possible to connect
or add a triple central heating system. The electronic control of the AK
2000 monitors a chance of temperature and will increase the speed of the
air induction fan continuously during the process of gasification or combustion.
Accessories
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We can also offer you the full range of buffertanks, domestic hotwatertanks and expansiontanks sized to your specific systems- or personal needs. These tanks can also contain a solarcoil to connect up to your thermal solarpanels and can also have an electric immersion heater element. We can also supply you with all other accessories like connectors, valves, pumps, stainless steel flue pipes and exhaust extractors. In the event of a mains electric failure the boiler should be able to release its minimal boiler output into the primary gravity system of your heating system, or the boiler needs to be fitted with the Honeywell TS130 safety valve into a cooling loop circuit to dissipate this amount of heat. |
