Bradford-White Corp D-38T-155 service manual Table of Contents

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Table of Contents

	Page		Service Procedure
Introduction	4			- - -
Tools Required for Service	4		- - -
Sequence of Operation	6		- - -
Troubleshooting	7		- - -
Thermostat Circuit Testing	24			D24-I
Pilot Operation Testing	27			D24-II
Main Burner Operation Testing	30			D24-III
Main Burner & Pilot Removal & Inspection	32			D24-IV
Flue Baffle Removal & Inspection	35			D24-V
Anode Removal & Inspection	36			D24-VI
Generic Parts List	38		- - -
Glossary of Terms	41		- - -
Notes	41		- - -

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Contents Service Manual To be performed only by qualified service providersTable of Contents Features of Honeywell Integrated Controls System Tools Required for Service Specifications Sequence of Operation Lockout ConditionVoltage at primary pins 1&3 white TroubleshootingPins to black and white wires DefectiveFrom previous Displaying temperature SensorsExample of error code shown on control display Operate?Using Control Display for Servicing Water Heater Sensor is used Setpoint Display/Change Software Version Display only Select SET ExitingSELECTServiceSETMode Display of Water TemperatureTo Display and Change Temperature Setpoint To Display Flame Sense Current of the Pilot Flame SensorSetpoint Flashes Selectset Idle Status Operational Error Codes and Error History Display Error Code HistoryTo view previous error codes ExitingSELECTServiceSET Mode Error Code Definitions Error Code Shown Water Heater Display Press for 3 seconds to reset control in service modeDo not reset the display from the hard lockout Service Procedure D24-IThermostat Circuit Testing State without correcting the causeService Procedure D24-I Upper thermister location Applicable models Upper SensorLower Sensor 131 Service Procedure D24-IIPilot Operation Testing Pilot Inspection Meter Probe Micro-amp readings MeterProbe Micro Amp =114 Service Procedure D24-IIIMain Burner Operation Testing See Pilot Inspection section Build-up causing restrictionHeater. Refer to Installation Instructions InspectionMain Burner Removal Service Procedure D24-IVMain Burner & Pilot Removal and Inspection Main Burner InspectionFlame Rod Pilot Burner RemovalPilot Burner Inspection Ferrule NutTo remove lower sensor Control Board ReplacementControl board replacement Service Procedure D24-V Flue Baffle Removal, InspectionService Procedure D24-VI Approximate Anode Rod Locations Generic Parts List 15A 16/16A 17/17A13A 14A 16A 17A6A 11A 10A 18A 15A 19A 12A 20A 19B 20B 17B18B 16B 12B10B 13B 14B 15BECO BTU/HCO2 GFIPage Page Parts@bradfordwhite.com Techserv@bradfordwhite.com