Webster JB Series Installation, Startup, Operation And Maintenance Manual page 15

Mounting Flange
Nose Choke Cone
Primary Gas Orifice
Retention plate Assembly
Figure B-9
Standard Head Arrangement
Section View
Retention Plate
Assembly
Back Mounting
Plate w/View Port
To Oil System
Return
Oil Supply Line
(lower pipe)
Pilot Gas Supply
View Port
Pilot Gas Inlet
Oil Supply Line
Backplate
JB Manual
Diffuser
Oil Supply Line
Oil Return Line
Pilot Gas
Supply Line
Figure B-10
JB3 Combination or Straight Oil Drawer Assembly
with Proven Gas Pilot
Oil Supply Line
Pilot Gas Line
Figure B-11
JB1 & 2 Combination Drawer Assembly
with Proven Gas Pilot Ignition
Orifice Plate
Gas Manifold (inner cylinder)
This connection between the retention plate as-
sembly and the gas manifold inner cylinder must
be properly made for proper performance.
Gas Pilot
Ignition Electrode
Page 15
Gas Manifold
Secondary Gas Orifices
Drawer Assembly
Ignition Electrode
Pilot Assembly
Gas Inlet
Diffuser Mounting Bracket
Oil Nozzle(s)
Adapter
Oil Nozzle(s)
Diffuser
Ignition Electrode
Gas Pilot
Oil Nozzle(s)
Adapter
Oil Nozzle(s)
Diffuser
Sight Tube
Identification