Bradford-White Corp D-38T-155 service manual Btu/H, CO2, Eco, Gfi, Gpm, Led, Npt, Psi, Vac

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Glossary of Terms

AC

Alternating Current

BTU/H

British Thermal Units per Hour

CO

Carbon Monoxide

CO2

Carbon Dioxide

DC

Direct Current

ECO

Energy Cut Off

GFI

Ground fault interrupt

GPM

Gallons per Minute

Hz

Hertz

LED

Light Emitting Diode

NOx

Oxides of Nitrogen

NPT

National Pipe Thread

PSI

Pounds per Square Inch

VA

Volt Amps

VAC

Volts Alternating Current

W.C.

Inches of Water Column

°C

Degrees Centigrade

°F

Degrees Fahrenheit

ȝA

Micro Amp

NOTES

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Contents To be performed only by qualified service providers Service ManualTable of Contents Features of Honeywell Integrated Controls System Tools Required for Service Specifications Lockout Condition Sequence of OperationPins to black and white wires TroubleshootingVoltage at primary pins 1&3 white DefectiveExample of error code shown on control display Displaying temperature SensorsFrom previous Operate?Using Control Display for Servicing Water Heater Sensor is used Setpoint Display/Change Software Version Display only Select SET Display of Water Temperature ExitingSELECTServiceSETModeTo Display Flame Sense Current of the Pilot Flame Sensor To Display and Change Temperature SetpointSetpoint Flashes Selectset Idle Status Operational Error Code History Error Codes and Error History DisplayTo view previous error codes ExitingSELECTServiceSET Mode Error Code Definitions Press for 3 seconds to reset control in service mode Error Code Shown Water Heater DisplayThermostat Circuit Testing Service Procedure D24-IDo not reset the display from the hard lockout 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 Probe Micro-amp readings MeterMeter Probe Micro Amp =114 Service Procedure D24-IIIMain Burner Operation Testing Heater. Refer to Installation Instructions Build-up causing restrictionSee Pilot Inspection section InspectionMain Burner & Pilot Removal and Inspection Service Procedure D24-IVMain Burner Removal Main Burner InspectionPilot Burner Inspection Pilot Burner RemovalFlame Rod Ferrule NutTo remove lower sensor Control Board ReplacementControl board replacement Flue Baffle Removal, Inspection Service Procedure D24-VService Procedure D24-VI Approximate Anode Rod Locations 15A 16/16A 17/17A Generic Parts List13A 14A 16A 17A6A 11A 10A 18A 15A 19A 12A 20A 14B 15B 19B 20B 17B18B 16B 12B10B 13BCO2 BTU/HECO GFIPage Page Parts@bradfordwhite.com Techserv@bradfordwhite.com