Beckett Oil Burner Manuel D’Utilisation

Page 8 

RWB 6104 BAFG R02

1.  The important ‘Z’ dimension is the distance from the face of the nozzle 

to the fl at face of the head (or heat shield, if applicable). This dis-
tance for F heads is 1-⅛” (1-⅜” if the air tube has a heat shield). The 
“Z” dimension is factory set for burners shipped with the air tube in-
stalled. Even if factory set, verify that the “Z” dimension has not been 
changed. 

2.  Use the following procedure to adjust the “Z” dimension, if it is not 

correct: 

Turn off power to the burner. 
Disconnect the oil connector tube from the nozzle line
See above fi gure. Loosen the splined nut from the nozzle line. 
Loosen the hex head screw securing the escutcheon plate to the 
burner housing. 
Place the end of a ruler at the face of the nozzle and, using a 
straight edge across the head, measure the distance to the face of 
the head. A Beckett T501 gauge may also be used.
Slide the nozzle line forward or back until this dimension for F 
heads is 1-⅛” (1-⅜” to the face of the heat shield, if applicable). 
Tighten the hex head screw to secure the escutcheon plate to the 
burner chassis. Then tighten the splined nut and attach the oil con-
nector tube. 

3.  Recheck the “Z” dimension periodically when servicing to ensure the 

escutcheon plate has not been moved. You will need to reset the “Z” 
dimension if you replace the air tube or nozzle line assembly. The 
Beckett Z gauge (part number Z-2000) is available to permit checking 
the F head “Z” dimension without removing the burner from the appli-
ance.

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For usable length A (inches)

Dimension (inches)

F Head

L1 

Head

L2 

Head

V1 

Head

H (nozzle to head), +

1/32

N/A

1/4

7/32

1/4

L (Total tube length)

A+

1/2

A+

1/2

A+

1/2

A+

1/2

R (electrode length), + 

1/4

A+2-

1/4

A+1-

1/8

A+1-

1/8

A+1-

1/8

S (adapter to static plate), + 

1/16

(Note 1)

1-

3/8

1-

3/8

1-

3/8

Q (nozzle line length), 

A+ 

15/16

A+ 

3/16

A+ 

3/16

A+ 

3/16

Z (F head-no heat shield)
   (F head-with heat shield)

1-

1/8

1-

3/8

N/A
N/A

N/A
N/A

N/A
N/A

Z (L1 head w/straightshroud)
   (L1/L2/V1 head w/conic 

shroud)

N/A
N/A

1-

3/8

1-

3/4

N/A

1-

3/4

N/A

1-

3/4

Make all adjustments exactly as outlined in 
the following information.

y

WARNING