20045701
12
Installation
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
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:
³
fastened securely to the burner;
³
made of a suitable material, with temperature characteristics
in the range - 22 °F to 176 °F;
³
in compliance with all requirements of applicable regulations
in force in the country of destination.
³
The intake-tube / burner system must not allow a loss of over
70.67 ft
3
/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).
³
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.
³
The temperature of the incoming air must not exceed 104 °F;
³
The inside diameter of the intake tube must be at least 4 inch.
³
The intake tube can be up to 100 ft in length.
³
Under no circumstances should the air’s entry in the hose
intake area be obstructed.
³
The hose must not be blocked in any way or feature a shutting
device (valves, membranes etc.).
³
Coaxial tubes must not be installed for any reason.
WARNING
For correct bf application, the burner must be in-
stalled on an appropriate BF boiler.
WARNING
Length is reduced if there are bends in the intake
section.
For instance, using a tube with a smooth inside sur-
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.
WARNING
Burner installation must comply with one of the in-
stallations illustrated in the Fig. 7.
D5884
D5883
Fig. 6
A
B
