Beckett Burner CF375 Manuel D’Utilisation

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 ¼” nominal.
Pitch the air tube at 2° from horizontal as shown and secure 
the fl ange to the air tube. See Figure 2.

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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 ¼” back from fl ush with 
the refractory inside entry wall to prevent damage from 
overheating.

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Install nozzle line assembly

Insert the nozzle line assembly into the burner air tube. 
Reference Figure 5.
Slide the secondary adjusting plate (Figure 6, item f) com-
pletely to the left on the indicator adjusting plate (item e). 
Finger tighten acorn nut (item c) to secure the two plates 
together. Slide both plates completely to the right (Indica-
tor Plate will read 0). Tighten fastener (item d).
Install the spline nut on the end of the nozzle line, leaving 
the nut loosely placed so the plates can be moved.

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Mount air tube to burner

Insert the air tube into the burner housing. Carefully align 
the the four screw holes. 
Attach the air tube to the burner using the four provided 
screws.

Install nozzle

Install the oil nozzle in the nozzle adapter.  Use a 3/4” 
open-end wrench to steady the nozzle adapter and a 5/8” 
open-end wrench to turn the nozzle. Tighten securely but 

do not over-tighten.

Check electrode settings

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Adjust the electrode gap and position in relation to the 
nozzle to the specifi cations shown in Figure 4.

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Check, and adjust if necessary, the critical dimensions 
shown in Figure 4. Verify that the oil tube assembly and 
electrodes are in good condition, with no cracks or dam-
age.

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