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4 217 901 / 02
TECHNICAl INFORMATION
3.
Technical information
3.1
Description of the boiler
The Hoval UltraGas
®
(1550) is a low-pollution and ener-
gy-saving gas condensing boiler with the Ultraclean bur-
ner system, a gas-fired pre-mix burner with combustion
air fan. The Hoval UltraGas
®
(1550) has a vertically arran-
ged combustion chamber of stainless steel as the primary
heating surface and a secondary heating surface of com-
posite tubes (stainless steel on the water side, aluminium
on the exhaust gas side).
The secondary heating surface is designed so that part of
the water vapour contained in the exhaust gas conden-
ses and the heat of evaporation is utilised for the heating
circuit. The gas burner is configured as a vertical burner
that can be swivelled up easily for maintenance work.
The UltraGas
®
(1550)
®
is provided for operation with na-
tural gas and liquefied gas. The design principle is shown
in the following drawing.
The UltraGas
®
corresponds with the stan-
dards and guidelines listed in the EU decla-
ration of conformity. The EU declaration of
conformity belonging to the product is found
in the system book.
Fig. 10
Summary of Contents for UltraGas 1550
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