Unigas H365X, Manual Of Installation - Use - Maintenance

Page: 17 / 116

PART II: INSTALLATION
17
Fitting the burner to the boiler
To install the burner into the boiler, proceed as follows:
1
make a hole on the closing door of the combustion chamber as described on paragraph “Overall dimensions”)
2 place the burner to the boiler: lift it up and handle it according to the procedure described on paragraph “Handling the burner”;
3 place the 4 stud bolts (5) on boiler’s door, according to the burner drilling template described on paragraph “Overall dimensions”;
4 fasten the 4 stud bolts;
5 place the gasket on the burner flange;
6 install the burner into the boiler;
7 fix the burner to the stud bolts, by means of the fixing nuts, according to the next picture.
8 After fitting the burner to the boiler, ensure that the gap between the blast tube and the refractory lining is sealed with appropriate
insulating material (ceramic fibre cord or refractory cement).
Matching the burner to the boiler
(
low NOx burners)
The burners described in this manual have been tested with combustion chambers that comply with EN676 regulation and whose
dimensions are described in the diagram. In case the burner must be coupled with boilers with a combustion chamber smaller in diame-
ter or shorter than those described in the diagram, please contact the supplier, to verify that a correct matching is possible, with respect
of the application involved. To correctly match the burner to the boiler verify the type of the blast tube. Verify the necessary input and
the pressure in combustion chamber are included in the burner performance curve; otherwise the choice of the burner must be revised
consulting the burner manufacturer. To choose the blast tube lenght consider the following rule, even if it differs from the instructions of
the boiler manufacturer:
4
1
2
3 4
5
6
7
6
Keys
1 Burner
2 Fixing nut
3 Washer
4 Sealing gasket
5 Stud bolt
7 Blast tube
Cast-iron boilers, three pass flue boilers (with the first pass
in the rear part): the blast tube must protrude about
150÷200 mm into the combustion chamber (Fig.
A ).The
length of the blast tubes does not always allow this
requirement to be met, and thus it may be necessary to use
a suitably-sized spacer to move the burner backwards
(Fig.
B ).
5° MAX
150÷200 mm
WARNING! Carefully seal the free space between blast tube and
the refractory lining with ceramic fibre rope or other suitable
means.
ceramic fibre
refactory wall
B
A