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6104 BCF5 R06 Page 7
Mount the burner
Mount fl ange(s) on air tube
This section does not apply to burners with welded fl ang-
es.
Do not install air tube on burner.
For non-pressure fi ring fl ange, refer to Figure 3: Install
gasket (item a) and fl ange (item d). Ignore the next
paragraph.
For pressure-fi ring fl ange, refer to Figure 3: Slide gasket
(item a) onto the air tube, making sure the top of the air
tube is up. Pre-drill holes in the pressure fi ring plate (item
b) to match the appliance studs. Slide the pressure fi ring
plate (item b) and fl ange (item d) onto the air tube as
shown. Wrap ceramic fi ber rope (item c) around the air
tube and press tightly into the inside diameter of the fl ange
(item d).
Slide the air tube (item e) into position in the appliance
front. Tighten the fl ange-mounting-stud nuts. Set the
insertion of the air tube so dimension G is 1/4” nominal.
Pitch the air tube at 2° from horizontal as shown and secure
the fl ange to the air tube.
y
y
y
y
y
y
Protect the Air Tube From
Overheating
Overheating could cause damage to the air
tube and other combustion components lead-
ing to equipment malfunction and impaired
combustion performance.
The end of the air tube must not extend into the com-
bustion chamber unprotected unless it has been facto-
ry-tested and specifi ed by the appliance manufacturer.
Position the end of the air tube 1/4” back from fl ush
with the refractory inside entry wall to prevent damage
from overheating.
y
y
Figure 3 - Mount fl ange(s) on air tube
Firebox
pressure
(in w.c.)
CF500 CF800
Tube KK Tube KH Tube KJ
No reserve air
0.0” 5.50 7.00 8.00
0.1” 4.75 6.25 7.50
0.2” 4.00 5.50 6.75
0.3” 3.50 4.50 6.25
0.4” 2.75 3.75 5.50
0.5” 2.00 3.00 5.00
Note: The above ratings may vary 5% due to variations in ac-
tual job conditions.
Table 2 - Air tube capacities vs fi rebox pressure