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4.6
Burner assembly
4.6.1
CF - Chimney Vent Application
In case of CF applications, the burner shall not operate without pro-
tection A)(Fig. 6) of the suction inlet.
4.6.2
BF - Direct Vent Application
For correct bf application, the burner must be in-
stalled on an appropriate BF boiler.
WARNING
In case of BF applications an optional snorkel and gasket are avail-
able replacing A) with B)(Fig. 6).
This item can be supplied separately.
The combustion air supply is through a flexible or rigid pipe con-
nected to the air intake.
Consequently, you must comply with the following requirements
and instructions:
The combustion air intake tube must be:
fastened securely to the burner;
made of a suitable material, with temperature characteristics
in the range - 22 °F to 176 °F;
in compliance with all requirements of applicable regulations
in force in the country of destination.
The intake-tube / burner system must not allow a loss of over
3
70.67 ft
/h at 0.2"wc: for instance, the above requirements will
be met if you use flues for pressure exhaust of flue gases (the
condensation kind).
Make sure the air intake tube's inlet is positioned so that it is
not likely to be obstructed by foreign matter and, where neces-
sary, use suitable screens.
The temperature of the incoming air must not exceed 104 °F;
The inside diameter of the intake tube must be at least 4 inch.
The intake tube can be up to 100 ft in length.
Length is reduced if there are bends in the intake
section.
For instance, using a tube with a smooth inside sur-
WARNING
face, you must allow for the following losses:
–
for each 45° bend, tube length is reduced by
5 ft;
–
for each 90° bend, tube length is reduced by
10 ft.
Burner installation must comply with one of the in-
stallations illustrated in the Fig. 7.
WARNING
Under no circumstances should the air's entry in the hose
intake area be obstructed.
The hose must not be blocked in any way or feature a shutting
device (valves, membranes etc.).
Coaxial tubes must not be installed for any reason.
20045701
Installation
D5884
12
A
B
D5883
Fig. 6
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