Cleaver-Brooks CBW - Controls Common to All Boilers; Typical Steam Boiler - Light Oil Fired

CHAPTER!
GENERAL DESCRIPTION AND PRINCIPLES OF OPERATION
GAS CONTROL
VALVE
FUEL
OIL
CONTROLLER
OIL
RELIEF VALVE
ERATING, HIGH
LIMIT AND
LATING PRESSURE CONTROLS
WATER COLUMN
AND PUMP CONTROLS
[FIGURE 1-1 I TYPICAL STEAM BOILER- LIGHT OIL FIRED]
Boilers having optionally ordered features may
have control components not listed here.
D. CONTROLS COMMON TO
ALL BOILERS
(1) Forced Draft Fan Motor (Fig. 1-1): Drives the
forced draft fan directly
to provide combustion
air. Also referred
to as a blower motor.
(2) Forced Draft Fan Motor Starter (Fig. 1-7):
Energizes the forced draft fan (blower) motor.
CHAPTER 1-4
(3) Forced Draft Fan (Fig. 1-10): Furnishes all
air, under pressure, for combustion
of pilot fuel
and main fuel, and for purging.
( 4) Ignition Transfonner (Fig.
1-1 ): Provides a
high voltage spark for ignition
of the gas pilot or
the light oil pilot.
(5) Modulating Motor (Fig. 1-1): Operates the
rotary air damper and fuel valves through a cam
and linkage system to provide proper air fuel
ratios under all boiler load conditions.
750-150