8
TECHNICAL FEATURES
AND DIMENSIONS
2.2 - MAIN COMPONENTS
XC-K oil boilers are equipped with a blind cylindrical furnace,
in which the central flame of the burner is reversed peripherally
towards the front. When the combustion gases have reached the
front part, they are sent through the door into the tubes of the third
pass to reach the rear flue gas chamber and then the chimney.
The combustion chamber is always pressurised while the burner
is operating, within the power range of the boiler.
For the value of this pressure, see the tables
on pages 11÷13, in the column “Flue gas side
pressure drops”.
The chimney must be calculated so that
no positive pressure is detected
at its base.
2
1
2
3
6
5
4
M
R at
R bt
2.1 -
TECHNICAL FEATURES
NOTE!
further details in the section
‘‘Technical Information’’ on the boiler
page of the www.unicalag.it website
fig. 1
KEY
N°
Description
1
Furnace
2
Smoke pipes with smoke diverters
3
Door with flame sight glass
4
Smoke chamber
5
Body insulation
6
Panel board
M
Flow
Rbt
Low temperature return
Rat
High temperature return
Summary of Contents for XC-K oil 230
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