L.B. White Pilot - Manual (Page 70)

August 1999 8.8-1 1
Burner and Burner Orifice
Servicing
Instructions
Over a period of time, the burner and orifice may start to
become blocked if cleaning is not provided. This can create
poor burning of the fuel gas, resulting in nuisance heater
problems. Removal of burner and orifice may be required if
blockages cannot be removed by general cleaning. If
removal is necessary, refer to the following instructions.
Familiarize yourself with these procedures before
disassembly.
1. Shut off the gas supply to the heater and disconnect
the heater’s electrical supply. Allow heater to cool.
2. Remove the hose and sediment trap from the inlet of
the gas control valve.
3. Remove the burner retaining bolt or screws from the
underside of the heater.
4. Open the burner end access panel (if applicable).
5. Remove the protective cover from over the control
valve (if applicable).
6. The gas control valve with manifold can now be
readied for removal from the heater. This procedure
varies slightly depending on model and age of the
heater. Some models allow the removal of two screws
that can be accessed at the control valve inlet.
Some may require removal of a bracket at the control
valve inlet, or beneath the throttle valve on the
manifold.
Others may also require removal of a bolt that secures
the control valve to the heater base.
Bolt
Bracket
Bracket