Initial Settings - Webster JB Series Installation, Startup, Operation And Maintenance Manual

The burner will be set at the factory for normal ini-
tial settings. These are only rough settings that
must be adjusted at startup to match the furnace,
fuel pressure and environment of the specifi c ap-
plication. These general settings are covered in
this chapter as a means of checking the burner
(linkage and settings can move in shipment) or
readjusting the burner if the settings are lost.
1. Oil nozzle position
The oil nozzle initial position is shown in Figure
G-2. The oil nozzle will be adjusted at start-up
and may be moved in or out from this initial set-
ting. In some cases, the oil nozzle may be inside
the diffuser
Flexible Strip
Retention
Plate
JB Manual
G. INITIAL SETTINGS
Oil Nozzle Position,
Chart G-2
PRESSURE ATOMIZED NOZZLE
Model Diffuser Qty.
I.D.
2
1 1/2"
JB1
1
1 3/4" 2
JB2
2 1/2" 3
JB3
2 7/8" 3
Fuel Cam Adjustment
Figure G-1
Gas Pilot
INNER FIRE CYLINDER
Spray Dimension Diffuser
Angle Inches I.D.
30 3/8
45 1/4
NA
30 7/8
45 3/4
30 3/4
45 5/8
60 1/2
60 5/8 2 1/2
60 5/8 2 7/8
Cam
Cam Set Screws
Adjusting Screws
Aluminum Strip
End Screws
Spring
End Screw
Adjusting Nut
Cam Follower
Roller Washers
Figure G-3
Page 28
B
AIR ATOMIZED NOZZLE
Nozzle Spray Dim.
Type Angle
NA NA
Single
60 o
2" 1/4"
Port
Multi
80 o
Port
Roller
Cam Follower
Dim.
A B
NA NA
NA
NA 3/8
Return
Springs
Jack
Shaft

Initial Settings