Unigas RG91 Manual page 12

PART II: INSTALLATION
Department.
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 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 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 follow the instructions of the boiler manufacturer. In
absence of these consider the following:
Cast-iron boilers, three pass flue boilers (with the first pass in the rear part): the blast tube must protrude no more than Dist = 100

mm into the combustion chamber. (please see the picture below)
Pressurised boilers with flame reversal: in this case the blast tube must penetrate Dm 50 ÷ 100 mm into combustion chamber in

respect to the tube bundle plate.(please see the picture below)
Dist. = 100 mm
DM = 50 ÷ 100 mm
WARNING! Carefully seal the free space between blast tube and the refractory lining with ceramic fibre rope or
other suitable means.
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 or to design a blast tube tha suites the utilisation (please, contact the manifacturer).
Handling the burner
WARNING! The handling operations must be carried out by specialised and trained personnel. If these
operations are not carried out correctly, the residual risk for the burner to overturn and fall down still
persists. To move the burner, use means suitable to support its weight (see paragraph "Technical spec-
ifications").
The unpacked burner must be lifted and moved only by means of a fork lift truck.
The burner is mounted on a support provided for handling the burner by means of a fork lift truck: the forks must be inserted into the A
anb B ways. Remove the stirrup only once the burner is installed to the boiler.
SIDE UP
SIDE DOWN
A: ceramic fibre
B: refractory wall
Note: the figure is indicative only.
B
Dist.
A
A B
12
DM