D. Fuel and Control Systems
1.
Gas Systems
2.
Gas Pilot
3.
Pressure Atomized Oil
4.
Air Atomized #2 Oil
5.
Fuel-Air-Ratio Controls
6.
Electrical Controls
7.
Operating and Modulating Controls
8.
Flame Safeguards
The burner can be equipped with a wide variety of fuel and
operating systems to control the fuel, air, modulation and
safety. This section describes how these systems operate
and their common components.
Each of the applicable systems must be completely under-
stood prior to operating any equipment. In addition to the
basic principles defined here, the component details and
specific combination of components on your specific unit
must be fully studied and understood. The fuel diagrams,
wiring diagram, component manuals and bill of materials
for the unit must be included in the study.
1. Gas Systems
All gas fuel systems have a common group of compo-
nents, including the pressure regulator, shutoff valves, gas
control valve and pressure switches. In addition, some
systems use a vent valve, pressure switches and proof of
closure switches. The type and location of these compo-
nents can vary with the different applicable regulations,
insurance and component supplier.
Page 28
Section D - Fuel and Electrical Systems
JBE(X) Manual