5
3 GENERAL
This is a commercial condensing boiler patented. The boiler condenses and utilises the latent heat absorbed from
the flue gases and is designed for operation with natural gas and LPG.
This boiler has no limit on boiler return temperature so the best boiler performance (efficiency 107%) is reached
when the boiler is fitted to an under floor heating circuit or when the return temperature is under 58 deg. C . Above
this temperature, the condensation phenomenon does not take place and so it is not possible take the latent heat
from the vapour of the flue. The boiler efficiency is still very high (97%) even when the boiler is fitted in a traditional
heating circuit plant working at delta T 80/65 deg. C.
The body that is slightly inclined, is composed of:
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single pass wet back furnace
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large diameter pipes connected directly to the furnace and the front tube plate (two-pass)
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corrugated horizontal flue passages, whose special surface increases: the heat exchange area, the flue gas
turbulence and the formation of condense, the easy drainage of same (three-pass).
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boiler shell complete with boiler flow, constant temperature return, variable temperature return, fittings for con-
trol thermostats and safety devices.
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rear smoke box has the function to drain the condense and an chimney connection to drain any condense from
the chimney.
All the parts of the boiler are manufactured in stainless steel AISI 316 Ti.
The high volume of the furnace reduces the thermal NOx production.
The high boiler efficiency is due to optimum combustion efficiency combined high density rock wool insu-
lation, which puts the boiler in the top position in European regulation “4 stars” according the Efficiency
Directive 92/42/EEC.
