SERVICE HANDBOOK

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CCBULTRA HIGH EFFICIENCY POWER VENT/POWER DIRECT VENT - <strong>SERVICE</strong> MANUALThe CCB circuit board is the main control. All instructions for ignition and temperaturecontrol originate from this circuit board. Diagnostic and operational messages are generatedby the CCB and sent to the UIM (page 27). Most of the water heater’s components, such asthe igniter, blower, gas valve, and temperature probe are directly connected to one of theCCB’s socket connectors.Service Notes - CCB ReplacementIf the CCB fails and needs to be replaced the replacement board will be shipped with thegray plastic enclosure and a new 24 VAC transformer. There is no need to remove the circuitboard from the enclosure when the CCB is being replaced.CCB Circuit BoardEnclosure With Front RemovedTransformer120V x 24V50 VATechnical Literature Department 35 of 52 Ashland City, TN © 2008Servicing should only be performed by a Qualified Service Agent
ULTRA HIGH EFFICIENCY POWER VENT/POWER DIRECT VENT - <strong>SERVICE</strong> MANUALCCB (CONT)Socket IdentificationAll wiring connections and sockets will be identified in the following pages. TheTroubleshooting section of this Service Manual will refer back to this illustration andinformation.121212 134534J24J32J5J4J1S11512963OPEN1 2 3 4J614131110875421J7 4 3 2 1J9J101 3J131 52 6J15J16J1124371482Technical Literature Department 36 of 52 Ashland City, TN © 2008Servicing should only be performed by a Qualified Service Agent
Page 4 and 5: ULTRA HIGH EFFICIENCY POWER VENT/PO
Page 12 and 13: BURNERULTRA HIGH EFFICIENCY POWER V
Page 16 and 17: GAS VALVEULTRA HIGH EFFICIENCY POWE
Page 28 and 29: UIMULTRA HIGH EFFICIENCY POWER VENT
Page 30 and 31: UIM (CONT)ULTRA HIGH EFFICIENCY POW
Page 32 and 33: UIM (CONT)ULTRA HIGH EFFICIENCY POW
Page 38 and 39: CCB (CONT)ULTRA HIGH EFFICIENCY POW
Page 54: 500 Tennessee Waltz ParkwayAshland

SERVICE HANDBOOK

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