Bradford-White Corp D-38T-155 service manual 19B 20B 17B18B 16B 12B10B 13B, 14B 15B

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Generic Parts List

19B 20B

7B

17B18B

8B

6B

5B

4B

3B

9B

16B

2B

12B10B

1B	13B	11B
1B

		14B
15B
1B.	Temperature Display	11B.	Power Cord Strain Relief
2B.	Control Box Cover	12B.	Pilot Wire Strain Relief
3B.	Integrated Control Board	13B.	Secondary Transformer Wiring Harness
4B.	Screw 8-16 X ½ PHCR	14B.	Primary Transformer Wiring Harness
5B.	Transformer	15B. Screw 8-18 x ¾ PHCR
6B.	Ground Lug	16B.	Gas Valve Control Wiring Harness
7B.	On/Off Switch	17B.	Damper Wiring Harness
8B.	Control Box Panel	18B.	Power Cord
9B.	Screw 8/32 X ¼ PHCR	19B.	Display Control Wiring Harness
10B. 7/8" Snap Bushing		20B.	Display Cover Wiring Harness

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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 ConditionTroubleshooting Pins to black and white wiresVoltage at primary pins 1&3 white DefectiveDisplaying temperature Sensors Example of error code shown on control displayFrom previous 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 modeService Procedure D24-I Thermostat Circuit TestingDo not reset the display from the hard lockout State without correcting the causeService Procedure D24-I Lower Sensor Upper SensorUpper thermister location Applicable models Pilot Operation Testing Service Procedure D24-II131 Pilot Inspection Micro-amp readings Meter ProbeMeter Probe Micro Amp =Main Burner Operation Testing Service Procedure D24-III114 Build-up causing restriction Heater. Refer to Installation InstructionsSee Pilot Inspection section InspectionService Procedure D24-IV Main Burner & Pilot Removal and InspectionMain Burner Removal Main Burner InspectionPilot Burner Removal Pilot Burner InspectionFlame Rod Ferrule NutControl board replacement Control Board ReplacementTo remove lower sensor 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 15BBTU/H CO2ECO GFIPage Page Parts@bradfordwhite.com Techserv@bradfordwhite.com