Burner Operation and Control
2-8
750-91 (revised 2009)
Model CB-LE Packaged Boiler Manual
2.5 — Controls Common to Oil-Fired Boilers
The following items are applicable to all oil-fired or gas and oil-fired boilers. Additional controls for No. 6 oil are
listed in section 2.6.
FIGURE 2-4. Front of Burner Drawer.
Component Description
Oil Drawer Switch Opens the limit circuit if oil drawer burner gun is not latched in the
forward position required for burning oil.
Atomizing Air Proving Switch Pressure actuated switch whose contacts are closed when sufficient
atomizing air pressure from the air pump is present for oil firing. Oil
valve(s) will not open, or will not remain open, unless switch con-
tacts are closed.
Atomizing Air Pressure Gauge Indicates the atomizing air pressure at the burner gun.
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 operating simultaneously.
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