Unigas S10, Installation Operation & Maintenance, Page: 7 / 32

PART I: INSTALLATION 7
MOUNTINGS AND CONNECTIONS
Packing
The burners are dispatched in cardboard pakages with dimensions: 760 x 510 x 440 mm (W x H x D).
Packing cases of this kind are affected by humidity and are not suitable for stacking. The following are placed in each packing
case.
1 burner with detached gas train;
1 gasket to be inserted between the burner and the boiler;
1 envelope containing this manual
To get rid of the burner’s packing and in the event of scrapping of the latter, follow the procedures laid down by current laws on
disposal of materials.
Fig. 7 - Fitting the burner to the boiler
Fix the flange of the burner to the boiler as shown in Fig. 7.
After fitting the burner to the boiler ensure that the space
between the blast tube and the refractory lining is sealed with
appropriate insulating material (ceramic fibre cord or refractory
cement).
Fig. 7
Matching the burner to the boiler
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 Fig. 8. In case the burner must be coupled with boilers with a
combustion chamber smaller in diameter 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 necessary input and the pressure in combustion chamber are inclu-
ded in the burner performance curve; otherwise the choice of the burner must be revised consulting the burner manu-
facturer.
To choose the blast tube lenght follow the instructions of the boiler manufacturer. In absence of these consider the fol-
lowing:
Cast-iron boilers, three pass flue boilers (with the first pass in the rear part): the blast tube must protrude no more
than 100 mm into the combustion chamber.
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.
Pressurised boilers with flame reversal: in this case the blast tube must penetrate at least 50 - 100 mm into combu-
stion chamber in respect to the tube bundle plate.
Key
a) Heat input Q in kW
b) Lenght of the flame tube in meters
c) Flame tube firing intensity in kW/m
3
d) Combustion chamber diameter (m)
Fig. 8 - Firing intensity, diameter and lenght of the test
flame tube as a function of the heat input Q.