Bradford-White Corp D-38T-155 service manual Service Procedure D24-VI

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SERVICE PROCEDURE D24-VI

Anode Removal and Inspection

WARNING

Heater components may be HOT when performing the following steps in this procedure.

Take necessary precaution to prevent personal injury.

Step 1. Disconnect (unplug) water heater from electrical supply.

Step 2. Turn “OFF” water supply to water heater.

Step 3. Open a near by hot water faucet to relieve tank pressure.

Step 4. Connect hose to drain valve of water heater and route to an open drain. Open drain valve and drain a minimum of 5 gallons of water from the water heater. Close drain valve and disconnect drain hose from water heater.

Step 5. Disconnect venting from draft diverter and remove draft diverter from top of water heater.

Step 6.

Disconnect flue damper from wire harness and remove flue damper from top

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of water heater (see photo 32).

Step 7. If required, turn off water supply and disconnect top plumbing connection from top of water heater.

Step 8. Remove screws holding jacket head to top of water heater and remove jacket head from top of water heater. Note, it may be necessary to use a screw driver to pry underneath jacket head (see photo 33).

Step 9. Remove insulation from top of water heater to expose collector cover, remove if necessary. (see next page for approx. anode locations)

Step 10. Remove screws from side (or top) of collector cover. Note, it may be necessary to chisel away some foam to access screws (see photo 34).

Step 11. Locate and remove anode rods from top of water heater (1-1/16 hex socket). Note, anodes located outside of the collector (see photo 35) may require foam

to be chiseled away to access anode rods. (see next page for approx. anode locations)

Step 12. Visually inspect anode rod. Anode rod may show signs of depletion; this is normal. If the anode shows signs of depletion

(approximately 5/8", see photo 36), replacement is recommended. If any of the steel core of the anode is exposed, replacement is recommended.

Step 13. Upon completion of inspection or subsequent replacement, reinstall anode rods into water heater.

Anode

Step 14. Check for leaks.

Step 15. Reinstall collector cover & insulation over collector cover.

Replace Anode

Step 16. Reinstall jacket head, flue damper and draft diverter. Reconnect venting.

Step 17. Reconnect plumbing connection to top of water heater if required.

Step 18. Restore water supply and power to water heater.

Step 19. Verify proper operation.

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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 Upper Sensor Lower SensorUpper thermister location Applicable models Service Procedure D24-II Pilot Operation Testing131 Pilot Inspection Micro-amp readings Meter ProbeMeter Probe Micro Amp =Service Procedure D24-III Main Burner Operation Testing114 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