General Description
1-12
750-96 (revised 2010)
Model CB Packaged Boiler Manual
9. Atomizing Air Pres-
sure Gauge
Indicates the atomizing air pressure at the burner gun.
10. Lube Oil Level Sight
Glass
Indicates the level of lubricating oil in the air-oil receiver tank.
11. Lube Oil Cooling
Coil
Cools the lubricating oil before it enters the air pump. A fan driven by the air pump motor
circulates cooling air over the coil.
12. Lube Oil Strainer Filters lubricating oil before it enters the air pump.
13. Lube Oil Fill Pipe
and Strainer
Used when adding oil to the air-oil receiver tank.
14. Air Intake Control An adjustable cock, located on the air intake pipe adjacent to the air filter, used to limit
pump output, if necessary.
15. Oil solenoid Valve Opens when energized through contacts in the programmer and allows fuel oil flow from
the oil metering valve to the burner nozzle. A light oil fired burner uses two valves operat-
ing simultaneously.
16. Fuel Oil Controller An assembly combining into a single unit the gauges, regulators, and valves required for
regulating the flow of fuel oil. All controllers have the following integral parts. In addition
to these, the controller used on an No. 5 or 6 oil fired burner has additional components
described in Section 1.10.
a) Oil Metering Valve: Valve metering stem moves to increase or decrease the orifice area
to regulate the supply of fuel oil to the burner nozzle in accordance with boiler load vari-
ances. Stem movement is controlled by the modulating motor through linkage and oil
metering cam.
b) Oil Modulating Cam: Assembly consisting of a quadrant, a series of adjustable allen-
head screws, and a contour spring provided for adjustment of oil input at any point in the
modulating range.
c) Oil Burner Pressure Gauge: Indicate pressure of the fuel oil at the metering valve.
d) Oil Pressure Regulator: For adjustment of the pressure of oil at the metering valve.
17. Fuel Oil Pump Transfers fuel oil from storage tank and delivers it under pressure to the burner system.
18. Oil Relief Valve Bypasses excess fuel oil and maintains pressure indicated on oil supply pressure gauge.
19. Fuel Oil Strainer Provided to prevent foreign matter from entering the burner system.
20. Gas Pilot See section 1.8 for component descriptions.
21. Light Oil Pilot Valve When a light oil pilot is furnished, a solenoid valve is provided to control flow of fuel to
the pilot nozzle. It is energized through the contacts of a programmer when pilot ignition
is desired. It is de-energized to shut off pilot fuel flow after main flame is ignited and
established.
22. Back Pressure Ori-
fice
A restriction located in the oil return line immediately downstream of the fuel oil control-
ler to create back pressure (100 and 200 series only).
Control Description
Courtesy of: C3 Surplus LLC
Surplus Industrial Superstore
305-428-2777
https://www.c3surplus.com
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