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Table 2 - Air tube capacities vs fi rebox pressure
CF500
Firebox
Tube
Tube
pressure
KK
KH
(in w.c.)
No reserve air
0.0"
5.50
7.00
0.1"
4.75
6.25
0.2"
4.00
5.50
0.3"
3.50
4.50
0.4"
2.75
3.75
0.5"
2.00
3.00
Note: The above ratings may vary 5% due to variations in actual
job conditions.
Stray Light
Protect Against Stray
Light Lockout
Failure to follow these instructions could cause
loss of burner operation resulting in no heat, an
unplanned process interruption, work stoppage
and the potential for frozen plumbing or other
cold weather property damage.
The control must detect a dark, no-fl ame condition in
order to start the burner or it will hold in the stray light
lockout mode.
Shield the burner from direct exposure to intense
light.
Dust and Moisture
Protect Against Dust and
Moisture
Wet, dusty environments could lead to blocked
air passages, corrosion damage to components,
impaired combustion performance and result in
asphyxiation, explosion or fi re.
This burner is designed for clean, dry installations.
Electrical controls are not protected against rain or
sprayed water.
Keep the installation clear of dust, dirt, corrosive va-
pors, and moisture.
Protective covers and more frequent maintenance may
be required.
6104 BCF5 R07
CF800
CF500
CF800
Tube
Tube
Tube
KJ
KK
KH
10% Turndown
8.00
4.95
6.30
7.50
4.27
5.62
6.75
3.60
4.95
6.25
3.15
4.00
5.50
2.47
3.37
5.00
1.80
2.70
Mount the burner
Tube
KJ
Overheating could cause damage to the air
tube and other combustion components lead-
7.20
ing to equipment malfunction and impaired
6.75
combustion performance.
6.07
The end of the air tube must not extend into the com-
5.62
bustion chamber unprotected unless it has been facto-
4.95
ry-tested and specifi ed by the appliance manufacturer.
4.50
Position the end of the air tube 1/4" back from fl ush
with the refractory inside entry wall to prevent damage
from overheating.
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 4: Install
gasket (item a) and fl ange (item d). Ignore the next
paragraph.
For pressure-fi ring fl ange, refer to Figure 4: 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.
Figure 4 - Mount fl ange(s) on air tube
Protect the Air Tube From
Overheating
7
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