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GENERAL
DESCRIPTION
The construction of the MEGA series boilers guarantees high output and efficiency at low flue gas temperatures, thus ensuring
reduced polluting emissions.
The appliances are made according to the EN 303 standard, part 1. The main technical elements of the design are:
- the careful design of the shapes, to ensure an optimum ratio between the combustion volumes and the heat exchange surfaces
- the choice of materials used, for the long life of the boiler.
The boilers feature pressurised combustion, a horizontal-cylinder configuration and flame reversal in the furnace, completely coo-
led; the flame produced by the burner is reversed peripherally towards the front, where the flue gas enters the tube bundle, featu-
ring turbulators to create a swirling path that increases the heat exchange by convection.
On leaving the tube bundle, the flue gas enters the rear chamber and is transferred to the chimney.The boilers are fitted with a door
featuring hinges that can be reversed for opening to the right or the left, and is adjustable in both height and depth. The body pla-
ting is insulated with a thick layer of glass wool, and covered with a further layer of tearproof material. The external finish consists
of painted steel panels. The hoisting hooks are fitted on the top of the plating.
The boilers feature two 1/2" fittings for bulb sheaths (able to house three bulbs each).
The pre-wired control panel is located above the boiler, and allows automatic operation.
OPERATING PRINCIPLE
The MEGA boilers are fitted with a closed cylindrical furnace, in which the flame produced by the burner is reversed periphe-
rally towards the front, from where the burned gas enters the fire tubes. At the outlet, the gas is collected in the smokebox and
is then sent to the chimney. The combustion chamber is always pressurised during the operation of the burner. For the pres-
sure values, see the tables on page 37, under the column Flue gas side pressure drop. The flue and the flue stack fitting must
be made in compliance with the standards and the legislation in force, using rigid pipes that are resistant to high temperatu-
res, condensate and mechanical stress, and are airtight.
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