Ccb (Central Control Board) - A.O. Smith Cyclone XL 100 Series Service Handbook

The CCB is a printed circuit board mounted inside a protective plastic enclosure, see Figures below and on next page. The CCB circuit
board is the main control. All instructions for ignition and temperature control originate from this circuit board. Diagnostic and operational
messages are generated by the CCB and sent to the UIM. See Figure 24 (page 40).
Most of the water heater's components, such as the Spark Igniter, Combustion Blower, 24 Volt Gas Control Valve, and Temperature
Probe are directly connected to one of the CCB's socket connectors.
CCB )CENTRAL CONTROL BOARD) CCB )CENTRAL CONTROL BOARD)
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